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WO2018142919A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2018142919A1
WO2018142919A1 PCT/JP2018/001023 JP2018001023W WO2018142919A1 WO 2018142919 A1 WO2018142919 A1 WO 2018142919A1 JP 2018001023 W JP2018001023 W JP 2018001023W WO 2018142919 A1 WO2018142919 A1 WO 2018142919A1
Authority
WO
WIPO (PCT)
Prior art keywords
power storage
cooling member
storage device
storage module
refrigerant
Prior art date
Application number
PCT/JP2018/001023
Other languages
French (fr)
Japanese (ja)
Inventor
友規 神谷
耕二郎 田丸
Original Assignee
株式会社豊田自動織機
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017015908A external-priority patent/JP6828471B2/en
Priority claimed from JP2017015512A external-priority patent/JP6828470B2/en
Application filed by 株式会社豊田自動織機 filed Critical 株式会社豊田自動織機
Publication of WO2018142919A1 publication Critical patent/WO2018142919A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
    • H01G11/18—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors against thermal overloads, e.g. heating, cooling or ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a power storage device.
  • a bipolar battery having a plurality of stacked bipolar electrodes is known.
  • Each bipolar electrode includes an electrode plate, a positive electrode provided on one surface of the electrode plate, and a negative electrode provided on the other surface of the electrode plate.
  • Patent Literature 1 and Patent Literature 2 disclose a power storage device including a bipolar battery. In these power storage devices, high capacity and high output can be achieved by forming a plurality of bipolar batteries into an assembled battery.
  • Patent Document 3 discloses a power storage device in which a plurality of power storage modules are electrically connected in parallel and a heat dissipation path is provided in a conductor that electrically connects adjacent power storage modules. When such a cooling member is used, it is desired to improve the heat dissipation of the power storage module by efficiently circulating the refrigerant.
  • One aspect of the present invention provides a power storage device that can improve heat dissipation of a power storage module.
  • a power storage device includes an electrode plate having a first surface and a second surface opposite to the first surface, a positive electrode provided on the first surface, and a negative electrode provided on the second surface. Are stored in the first direction, and a cooling member that cools the power storage module by circulation of the refrigerant.
  • the power storage module includes a laminated body having a plurality of laminated bipolar electrodes, and a frame body that holds an edge portion of the electrode plate on a side surface extending in the first direction of the laminated body.
  • the cooling member is arranged side by side with the stacked body in the first direction.
  • the frame body covers the side surface and is provided with a main body region provided with a liquid injection port for injecting an electrolyte into the frame body, a protruding region protruding from the main body region so as to be separated from the liquid injection port in the first direction,
  • the cooling member is provided with an opening for allowing the refrigerant to flow into the cooling member or for allowing the refrigerant to flow out of the cooling member.
  • the direction of the liquid inlet and the direction of the opening are different from each other.
  • the cooling member is arranged side by side with the stacked body in the first direction.
  • the frame in the power storage module has a main body region that covers the side surface of the laminate and is provided with a liquid injection port, and a protruding region that protrudes from the main body region so as to be separated from the liquid injection port in the first direction.
  • region protrudes in a 1st direction from the main body area
  • a cooling member is covered with a protrusion area
  • the direction of the liquid injection port provided in the main body region and the direction of the opening provided in the cooling member are different from each other.
  • the opening is not covered by the protruding area.
  • coolant can be distribute
  • the direction in which the liquid injection port faces and the direction in which the opening faces may be orthogonal to each other.
  • the opening can be further opened from the protruding region.
  • the cooling member may be provided with a plurality of flow paths for circulating the refrigerant.
  • the plurality of flow paths may be arranged in a second direction that intersects the first direction, and may extend in a third direction that intersects the first direction and the second direction.
  • the cooling member may include a pair of plate members that sandwich the plurality of flow paths in the first direction.
  • the plate member since the plate member can be brought into contact with the power storage module as a whole, it is possible to suppress application of local pressure to the power storage module.
  • the cooling member may have a plate shape.
  • the cooling member may be provided with a through hole that penetrates the cooling member in a direction intersecting the first direction. In this case, since the refrigerant can be circulated more efficiently inside the cooling member, the heat dissipation of the power storage module can be further improved.
  • the cooling member may have conductivity.
  • the power storage modules adjacent in the first direction can be electrically connected by the cooling member.
  • the refrigerant may have an insulating property. In this case, it is possible to prevent a short circuit between the cooling members through the refrigerant.
  • the power storage device includes a plurality of power storage modules arranged in one direction and a conductor disposed in contact with both of the power storage modules adjacent to each other.
  • the power storage module includes a plurality of first electrodes and an electrode plate having a second surface opposite to the first surface, a positive electrode provided on the first surface, and a negative electrode provided on the second surface. It has a laminated body formed by laminating bipolar electrodes via separators, and a seal portion that holds the peripheral portions of the plurality of bipolar electrodes and forms the side surfaces of the laminated body.
  • the conductor is formed with a flow path extending in a direction crossing one direction. The distance between the seal portions in the storage modules adjacent to each other, and the first distance of the first portion facing the end portion of the flow channel in the extending direction of the flow channel is the second distance of the second portion not facing the end portion. Longer than.
  • the first distance between the seal portions in the first portion facing the channel end is longer than the second distance of the second portion not facing the channel end.
  • the flow path may extend in a straight line, and the second portion is a portion that does not face the end portion and that extends along the direction in which the flow path extends. There may be.
  • the flow path can be easily formed in the conductor.
  • the seal portions of the power storage modules adjacent to each other may be in contact with each other.
  • cooling air leakage due to circulation of cooling air in addition to the flow path can be effectively suppressed.
  • the seal portions of the power storage modules adjacent to each other may be in contact with each other in an elastically deformed state.
  • dimensional tolerance in the height direction of the conductor can be absorbed.
  • At least one of the power storage modules adjacent to each other may have a convex portion at a portion where the seal portions are in contact with each other. In the power storage device, it can be easily elastically deformed at a portion where the seal portions are in contact with each other.
  • one of the storage modules adjacent to each other has a convex portion formed in a portion where the seal portions contact each other, and the other of the storage modules adjacent to each other includes A concave portion that covers the convex portion may be formed in a portion that contacts the surface.
  • dimensional tolerance in the height direction of the conductor can be absorbed.
  • the extending direction of the flow path formed in the conductor may be the same in all the conductors arranged in one direction.
  • the seal portion covers the outer peripheral surface of the frame-shaped first seal portion joined to the peripheral portion of the electrode plate and the first seal portion, and the first seal portion is integrated. And a second seal portion that holds the target.
  • the sealing performance of the electrolyte solution in the power storage module can be improved.
  • FIG. 1 is a perspective view showing a power storage device according to a first embodiment.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is sectional drawing which shows the electrical storage module shown by FIG. It is a perspective view which shows the electrical storage module shown by FIG. It is the side view to which a part of electrical storage module of FIG. 4 was expanded. It is sectional drawing for demonstrating the formation method of a 2nd resin part. It is a perspective view which shows the cooling member shown by FIG. It is a side view which shows the electrical storage apparatus which concerns on a comparative example. It is the side view to which a part of electrical storage apparatus of FIG. 8 was expanded.
  • FIG. 13 is a cross-sectional view seen from the stacking direction when the power storage device shown in FIG. 12 is cut along the line XIV-XIV. It is the figure which looked at the electrical storage apparatus which concerns on a modification from the direction which the edge part of the through-hole formed in the conductor can be seen in the front. It is the figure which looked at the electrical storage apparatus which concerns on a modification from the direction which the edge part of the through-hole formed in the conductor can be seen in the front. It is the figure which looked at the electrical storage apparatus which concerns on a modification from the direction which the edge part of the through-hole formed in the conductor can be seen in the front.
  • FIG. 1 is a perspective view showing the power storage device according to the first embodiment.
  • FIG. 2 is a sectional view taken along line II-II in FIG.
  • the power storage device 10 shown in FIGS. 1 and 2 is used as a battery for various vehicles such as forklifts, hybrid vehicles, and electric vehicles.
  • the power storage device 10 includes a plurality (three in the present embodiment) of power storage modules 12, a plurality (four in the present embodiment) of cooling members 14, and a restraining member 16.
  • the number of power storage modules 12 and cooling members 14 included in the power storage device 10 may be one each.
  • the power storage module 12 is, for example, a bipolar battery in which a plurality of bipolar electrodes 32 (see FIG. 3) are stacked in the first direction D1 (one direction).
  • the power storage module 12 is a secondary battery such as a nickel hydride secondary battery or a lithium ion secondary battery, but may be an electric double layer capacitor. In the following description, a nickel metal hydride secondary battery is illustrated.
  • the cooling member 14 cools the power storage module 12 by circulation of the refrigerant.
  • the cooling member 14 is arranged (laminated) alternately and side by side with the stacked body 30 (see FIG. 3) of the power storage module 12 in the first direction D1.
  • the cooling member 14 is disposed between two power storage modules 12 adjacent in the first direction D1, and is also disposed outside the power storage modules 12 located at both ends in the first direction D1.
  • the cooling member 14 has conductivity, and is formed of a conductive material such as metal, for example.
  • the cooling member 14 is electrically connected to the power storage modules 12 adjacent in the first direction D1. Thereby, the some electrical storage module 12 is connected in series in the 1st direction D1.
  • a positive electrode terminal 24 is connected to the cooling member 14 located at one end, and a negative electrode terminal 26 is connected to the cooling member 14 located at the other end.
  • the positive terminal 24 may be integrated with the cooling member 14 to which the positive terminal 24 is connected.
  • the negative electrode terminal 26 may be integrated with the cooling member 14 to which the negative electrode terminal 26 is connected.
  • the positive electrode terminal 24 and the negative electrode terminal 26 extend in a second direction D2 that intersects (here, orthogonal) the first direction D1.
  • the positive and negative terminals 24 and 26 can charge and discharge the power storage device 10.
  • the restraining member 16 is a member for restraining the power storage module 12 and the cooling member 14 in the first direction D1.
  • the restraining member 16 includes a pair of restraining plates 16 ⁇ / b> A and 16 ⁇ / b> B, a bolt 18, and a nut 20.
  • the bolt 18 and the nut 20 are connecting members that connect the restraining plates 16A and 16B.
  • An insulating film 22 such as a resin film is disposed between the restraining plates 16A and 16B and the cooling member 14, for example.
  • Each restraint plate 16A, 16B is comprised, for example with metals, such as iron.
  • the power storage module 12, the cooling member 14, each of the restraining plates 16A and 16B, and the insulating film 22 have, for example, a rectangular shape, and each longitudinal direction is the second direction D2 and each short direction. Are arranged in the third direction D3.
  • the third direction D3 is a direction that intersects (here, orthogonal) the first direction D1 and the second direction D2.
  • each of the restraining plates 16A and 16B is larger than the power storage module 12, the cooling member 14, and the insulating film 22.
  • the storage module 12 and the insulating film 22 are larger than the cooling member 14 when viewed from the first direction D1.
  • the restraint plate 16A is provided with a plurality of insertion holes 16A1 through which the shaft portion of the bolt 18 is inserted in the first direction D1.
  • the plurality of insertion holes 16A1 are located at both ends of the restraint plate 16A in the second direction D2 and both ends of the third direction D3, as viewed from the first direction D1, and outside the power storage module 12, the cooling member 14, and the insulating film 22. It is provided in the position.
  • the constraining plate 16B is provided with a plurality of insertion holes 16B1 through which the shaft portion of the bolt 18 is inserted in the first direction D1.
  • the plurality of insertion holes 16B1 are formed on the outer sides of the power storage module 12, the cooling member 14, and the insulating film 22 when viewed from the first direction D1 at both ends in the second direction D2 and both ends in the third direction D3 of the restraining plate 16B. It is provided in the position.
  • One restraint plate 16 ⁇ / b> A is abutted against the cooling member 14 connected to the negative electrode terminal 26 via the insulating film 22, and the other restraint plate 16 ⁇ / b> B attaches the insulating film 22 to the cooling member 14 connected to the positive electrode terminal 24.
  • the bolt 18 is passed through the insertion hole 16A1 and the insertion hole 16B1 sequentially from one restraint plate 16A side to the other restraint plate 16B side.
  • the insulating film 22, the cooling member 14, and the power storage module 12 are sandwiched and unitized, and a restraining load is applied in the first direction D1.
  • FIG. 3 is a cross-sectional view showing the power storage module shown in FIG.
  • the power storage module 12 includes a stacked body 30.
  • the stacked body 30 includes a plurality of bipolar electrodes 32 stacked in the first direction D1 with the separator 40 interposed therebetween.
  • the bipolar electrode 32 includes an electrode plate 34, a positive electrode 36 provided on one surface (first surface) of the electrode plate 34, and a negative electrode 38 provided on the other surface (second surface) of the electrode plate 34. Including.
  • the positive electrode 36 of one bipolar electrode 32 faces the negative electrode 38 of one bipolar electrode 32 adjacent in the first direction D1 with the separator 40 interposed therebetween, and the negative electrode 38 of the one bipolar electrode 32 It faces the positive electrode 36 of the other bipolar electrode 32 that is adjacent in the first direction D1 with 40 interposed therebetween.
  • an electrode plate 34 (negative terminal electrode) having a negative electrode 38 disposed on the inner surface is disposed at one end of the stacked body 30, and a positive electrode 36 is disposed on the inner surface at the other end of the stacked body 30. Is disposed on the electrode plate 34 (positive terminal electrode).
  • the negative electrode 38 of the negative electrode-side termination electrode faces the positive electrode 36 of the uppermost bipolar electrode 32 with the separator 40 interposed therebetween.
  • the positive electrode 36 of the positive terminal electrode is opposed to the negative electrode 38 of the lowermost bipolar electrode 32 with the separator 40 interposed therebetween.
  • the electrode plates 34 of these termination electrodes are connected to adjacent cooling members 14 (see FIG. 2).
  • the power storage module 12 includes a frame 50 that holds the edge 34a of the electrode plate 34 on the side surface 30a of the stacked body 30 extending in the first direction D1.
  • the frame body 50 is configured to surround the side surface 30 a of the stacked body 30.
  • the frame 50 can include a first resin portion 53 that holds the edge portion 34a of the electrode plate 34, and a second resin portion 54 that is provided around the first resin portion 53 when viewed from the first direction D1.
  • the first resin portion 53 constituting the inner wall of the frame 50 is provided from one surface (surface on which the positive electrode 36 is formed) of the electrode plate 34 of each bipolar electrode 32 to the end surface of the electrode plate 34 at the edge portion 34a. Yes. As viewed from the first direction D1, each first resin portion 53 is provided over the entire circumference of the edge portion 34a of the electrode plate 34 of each bipolar electrode 32. The first resin portions 53 adjacent in the first direction D1 are welded on the surface extending outside the other surface (surface on which the negative electrode 38 is formed) of the electrode plate 34 of each bipolar electrode 32. As a result, the edge portion 34 a of the electrode plate 34 of each bipolar electrode 32 is buried and held in the first resin portion 53.
  • an internal space (space) V that is airtightly partitioned by the electrode plates 34 and 34 and the first resin portion 53 is formed between the electrode plates 34 and 34 adjacent to each other in the first direction D1.
  • an electrolytic solution made of an alkaline solution such as an aqueous potassium hydroxide solution is accommodated.
  • the second resin portion 54 constituting the outer wall of the frame body 50 is a cylindrical portion that extends with the first direction D1 as the axial direction.
  • the second resin portion 54 extends over the entire length of the stacked body 30 in the first direction D1.
  • the second resin portion 54 covers the outer surface of the first resin portion 53 extending in the first direction D1.
  • the second resin portion 54 is welded to the first resin portion 53 on the inner side when viewed from the first direction D1.
  • the electrode plate 34 is a rectangular metal foil made of nickel, for example.
  • the edge portion 34 a of the electrode plate 34 is an uncoated region where the positive electrode active material and the negative electrode active material are not coated, and the uncoated region is buried in the first resin portion 53 constituting the inner wall of the frame body 50. It is an area to be held.
  • An example of the positive electrode active material constituting the positive electrode 36 is nickel hydroxide.
  • Examples of the negative electrode active material constituting the negative electrode 38 include a hydrogen storage alloy.
  • the formation region of the negative electrode 38 on the other surface of the electrode plate 34 is slightly larger than the formation region of the positive electrode 36 on one surface of the electrode plate 34.
  • the electrode plate 34 may be formed from a conductive resin.
  • the separator 40 is formed in a sheet shape, for example.
  • the material forming the separator 40 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), and a woven or non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, or the like. Is done.
  • the separator 40 may be reinforced with a vinylidene fluoride resin compound.
  • the separator 40 is not limited to a sheet shape, and may be a bag shape.
  • the frame 50 (the first resin portion 53 and the second resin portion 54) is formed in a rectangular cylindrical shape by, for example, injection molding using an insulating resin.
  • the resin material constituting the frame 50 include polypropylene (PP), polyphenylene sulfide (PPS), and modified polyphenylene ether (modified PPE).
  • the formation of the first resin portion 53 may be performed, for example, before the stacked body 30 is formed by stacking the bipolar electrode 32 via the separator 40 or after the stacked body 30 is formed. It may be broken. Formation of the 2nd resin part 54 is performed after formation of the 1st resin part 53 and the laminated body 30, for example.
  • FIG. 4 is a perspective view showing the power storage module shown in FIG.
  • the power storage module 12 has a rectangular plate shape, for example, and is disposed such that the thickness direction of the power storage module 12 is the first direction D1.
  • the power storage module 12 includes a pair of main surfaces 12a facing each other in the first direction D1, a pair of first side surfaces 12b facing each other in the second direction D2, and a pair of second side surfaces 12c facing each other in the third direction D3. And have.
  • the first side surface 12 b and the second side surface 12 c are configured by the second resin portion 54 of the frame body 50.
  • the frame 50 of the electricity storage module 12 has a main body region 51 that covers the side surface 30 a and a protruding region 52 that protrudes from the main body region 51.
  • the main body region 51 includes a first resin portion 53 and a second resin portion 54.
  • the main body region 51 has a pair of first side parts 51a that face each other in the second direction D2, and a pair of second side parts 51b that face each other in the third direction D3.
  • a liquid injection port 50 a for injecting an electrolytic solution into the frame body 50 is provided.
  • the liquid injection port 50a is provided on the outer surface of one of the first side portions 51a. Since the outer side surface of one first side portion 51a forms part of the first side surface 12b, it can be said that the liquid injection port 50a is provided on the first side surface 12b.
  • the liquid injection port 50a faces the same direction as the first side surface 12b provided with the liquid injection port 50a. That is, the direction in which the liquid injection port 50a faces is the direction in which the first side surface 12b faces, and the direction from the first side surface 12b to the outside of the power storage module 12 along the second direction D2.
  • the shape of the liquid injection port 50a is, for example, a rectangle, but may be another shape such as a circle.
  • the liquid injection port 50a extends, for example, such that the third direction D3 is the longitudinal direction.
  • the liquid injection port 50a is arranged, for example, at the center in the third direction D3 of the first side surface 12b.
  • the liquid injection port 50a may be disposed at the end of the first side surface 12b in the third direction D3.
  • the protruding region 52 is configured by the second resin portion 54.
  • the protruding region 52 protrudes from one first side portion 51a so as to be separated from the liquid injection port 50a in the first direction D1.
  • the protruding region 52 has, for example, a rectangular shape when viewed from the second direction D2.
  • the protruding region 52 has an outer surface that is continuous from the outer surface of one of the first side portions 51a and forms a part of the first side surface 12b.
  • the pair of protruding regions 52 are arranged so as to sandwich the liquid injection port 50a in the first direction D1.
  • the protruding region 52 is provided with a length that extends beyond the entire length of the liquid injection port 50a along the third direction D3 and protrudes from both outer sides of the liquid injection port 50a.
  • the liquid inlet 50a is sealed with a sealing material (not shown) after the electrolyte is injected.
  • the electrolytic solution is injected, for example, while pressing a supply pipe (not shown) for supplying the electrolytic solution against a region around the injection port 50a.
  • This peripheral region includes a portion adjacent to the liquid injection port 50 a on the outer side surface of one first side portion 51 a and the outer side surface of the protruding region 52.
  • FIG. 5 is an enlarged side view of a part of the power storage module of FIG. 4 as viewed from the second direction.
  • a portion of the second resin portion 54 constituting one first side portion 51a is provided with a single flow path 54a having a liquid injection port 50a as one end.
  • the channel 54a extends in the second direction D2 (see FIG. 4).
  • a portion of the first resin portion 53 that constitutes one first side portion 51a includes a plurality of internal spaces V (see FIG. 3) between the bipolar electrodes 32 adjacent in the first direction D1 and the flow paths 54a.
  • a flow path 53a is provided.
  • Each of the plurality of flow paths 53a extends in the second direction D2, and the plurality of flow paths 53a are arranged in the first direction D1.
  • the flow path 53a is formed between the first resin parts 53 and 53 by forming a groove on one surface side of the electrode plate 34. It may be a void. This groove may be formed at the same time so as to communicate with the internal space V and the flow path 54a when the first resin portion 53 is molded, or may be formed by processing after the first resin portion 53 is molded.
  • Each flow path 53a has, for example, a rectangular cross section.
  • the cross-sectional shape of the flow path 54a is, for example, the same shape as the liquid injection port 50a, and spreads so as to cover the plurality of flow paths 53a.
  • FIG. 6 is a cross-sectional view for explaining a method of forming the second resin portion.
  • the second resin portion 54 is formed by pouring the resin material 54P of the second resin portion 54 having fluidity into the mold M.
  • the mold M includes a first portion M1 that forms the outer edges of the main body region 51 and the protruding region 52 (see FIG. 5) of the frame body 50, and a second portion M2 that is a nesting for forming the flow path 54a.
  • Resin material 54P flows along the third direction D3, for example.
  • the resin material 54P flows between the pair of first portions M1 arranged to face each other, then collides with the second portion M2, and is divided into two along the periphery of the second portion M2.
  • the resin material 54P divided into two flows between the first portion M1 and the second portion M2, respectively, and then merges to flow between the pair of first portions M1.
  • the flow path of the resin material 54P is likely to be narrowed by the second portion M2 being disposed. Therefore, in order to secure the flow path of the resin material 54P, the first portion M1 is formed with a recess M1a in a portion corresponding to the second portion M2.
  • the recessed portion M1a is recessed with respect to the other portions of the first portion M1 so as to be separated from the second portion M2 in the first direction D1.
  • the protruding region 52 is formed by the recess M1a.
  • FIG. 7 is a perspective view showing the cooling member shown in FIG.
  • the cooling member 14 has a rectangular plate shape, for example, and is arranged so that the thickness direction of the cooling member 14 is the first direction D1.
  • the cooling member 14 includes a pair of main surfaces 14a facing each other in the first direction D1, a pair of first side surfaces 14b facing each other in the second direction D2, and a pair of second side surfaces 14c facing each other in the third direction D3. And have.
  • the cooling member 14 causes the refrigerant to flow inside the cooling member 14, thereby efficiently releasing heat from the power storage module 12 (see FIG. 1) to the outside, thereby cooling the power storage module 12.
  • the refrigerant is, for example, insulative and is air, a gas such as ammonia, or a liquid such as LLC.
  • the cooling member 14 is provided with a plurality of flow paths 15a for circulating the refrigerant.
  • the plurality of flow paths 15a are arranged in the second direction D2.
  • Each flow path 15a extends linearly in the third direction D3.
  • the channel 15a has, for example, a rectangular cross section.
  • the channel 15a may have a circular cross section or the like.
  • the cooling member 14 includes a pair of plate members 15b that sandwich the plurality of flow paths 15a in the first direction D1, and a plurality of connection members 15c that connect the pair of plate members 15b to each other.
  • the plate member 15b has, for example, a rectangular shape when viewed from the first direction D1, and has a main surface 14a as an outer surface thereof.
  • the connection member 15c is, for example, a rectangular plate that extends in the first direction D1 and the third direction D3.
  • the connection members 15c are arranged in the second direction D2 alternately with the flow paths 15a.
  • the connection members 15c arranged at both ends in the second direction D2 function as side walls of the cooling member 14, and have first side surfaces 14b as outer surfaces thereof.
  • the other connection member 15c functions as a partition that separates two adjacent flow paths.
  • the opening 15d faces the same direction as the second side surface 14c provided with the opening 15d. That is, the direction in which the opening 15d faces is the direction in which the second side face 14c faces, and is the direction from the second side face 14c toward the outside of the cooling member 14 along the third direction D3. Therefore, the direction in which the opening 15d provided in one second side surface 14c faces and the direction in which the opening 15d provided in the other second side surface 14c faces are different from each other and in opposite directions.
  • the direction in which the liquid injection port 50a (see FIG. 4) faces is different from the direction in which the opening 15d provided in any one of the pair of second side surfaces 14c faces.
  • the direction in which the liquid injection port 50a faces and the direction in which the opening 15d faces are, for example, orthogonal to each other.
  • the cooling member 14 is smaller than the power storage module 12 shown in FIG. 4 when viewed from the first direction D1, and the main surface 14a is entirely brought into contact with the electrode plate 34 inside the frame 50 of the power storage module 12.
  • the main surface 14a is configured by the outer surface of the plate member 15b. Therefore, it can be said that the cooling member 14 is disposed so that the plate member 15b is brought into contact with the electrode plate 34 as a whole, for example.
  • FIG. 8 is a perspective view showing a power storage device according to a comparative example.
  • FIG. 9 is an enlarged side view of a part of the power storage device of FIG. In FIG. 9, the illustration of the bolt 18 is omitted.
  • the power storage device 100 according to the comparative example is mainly different from the power storage device 10 according to the first embodiment in terms of a cooling member 14.
  • the plurality of flow paths 15a are arranged in the third direction D3, and each flow path 15a extends linearly in the second direction D2.
  • An opening 15d is provided in the first side surface 14b.
  • the direction in which the liquid injection port 50a faces and the direction in which the opening 15d faces are the same. Therefore, a part of the opening 15d is covered with the protruding region 52. Thereby, since the distribution
  • the direction toward the liquid injection port 50 a and the direction toward the opening 15 d are different from each other and are orthogonal to each other. Therefore, the opening 15d is not covered by the protruding region 52, and the opening 15d can be opened from the protruding region 52. For this reason, since the circulation of the refrigerant is not hindered by the protruding region 52, the refrigerant can be efficiently circulated through the opening 15d. As a result, in the power storage device 10, it is possible to suppress a decrease in cooling efficiency due to the cooling member 14, so that the heat dissipation of the power storage module 12 can be improved.
  • the cooling member 14 is provided with a plurality of flow paths 15a for circulating the refrigerant.
  • the flow path 15a is a through hole that penetrates the plate-like cooling member 14 in the third direction D3.
  • the plurality of flow paths 15a are arranged in the second direction D2 and each extend in the third direction D3. According to such a flow path 15a, since the refrigerant can be efficiently circulated inside the cooling member 14, the heat dissipation of the power storage module 12 can be further improved.
  • the cooling member 14 has a pair of plate members 15b that sandwich the plurality of flow paths 15a in the first direction D1. For this reason, since the outer surface of the plate member 15b, that is, the main surface 14a of the cooling member 14 can be brought into contact with the main surface 12a of the power storage module 12 as a whole, local pressure is applied to the power storage module 12. It is possible to suppress the addition.
  • the cooling member 14 has conductivity. For this reason, the power storage modules 12 adjacent in the first direction D1 can be electrically connected by the cooling member 14. Therefore, since it is not necessary to further provide a member for electrically connecting the power storage modules 12 to each other, the power storage device 10 can be reduced in size.
  • Refrigerant has insulating properties. For example, when a conductive coolant such as water is used, the cooling members 14 may be short-circuited through the coolant. In the power storage device 10, for example, an insulating refrigerant such as air is used. Therefore, it is possible to prevent a short circuit between the cooling members 14 through the refrigerant.
  • the power storage device 110 shown in FIG. 10 is used as a battery for various vehicles such as forklifts, hybrid cars, and electric cars.
  • the power storage module 112 is, for example, a bipolar battery. Examples of the power storage module 112 include secondary batteries such as a nickel hydride secondary battery and a lithium ion secondary battery, but may be an electric double layer capacitor. In the following description, a nickel metal hydride secondary battery is illustrated. 10 to 16 show the XYZ orthogonal coordinate system.
  • the plurality of power storage modules 112 are stacked via a conductor 114 such as a metal plate to form an array 111.
  • the conductor 114 is one metal body disposed between the power storage modules 112 and 112 adjacent to each other in the stacking direction (Z-axis direction; one direction), and both the power storage modules 112 and 112 adjacent to each other in the stacking direction. It arrange
  • the conductor 114 is made of a metal material such as aluminum and copper, for example. When viewed from the stacking direction, the power storage module 112 and the conductor 114 have, for example, a rectangular shape.
  • the conductor 114 When viewed from the stacking direction, the conductor 114 is smaller than the power storage module 112, but may be the same as or larger than the power storage module 112.
  • the conductor 114 is electrically connected to the power storage module 112 adjacent in the stacking direction. Thereby, the some electrical storage module 112 is connected in series in the lamination direction.
  • the conductors 114 are also arranged outside the power storage modules 112 positioned at both ends in the stacking direction of the power storage modules 112, respectively. That is, the conductor 114 is also disposed at both ends of the array body 111 in the stacking direction. In the stacking direction, a positive electrode terminal 124 is connected to the conductor 114 located at one end of the array 111, and a negative electrode 126 is connected to the conductor 114 located at the other end of the array 111.
  • the positive terminal 124 may be integrated with the conductor 114 to which the positive terminal 124 is connected.
  • the negative electrode terminal 126 may be integrated with the conductor 114 to which the negative electrode terminal 126 is connected.
  • the positive electrode terminal 124 and the negative electrode terminal 126 extend in a direction intersecting the stacking direction (X-axis direction). The positive and negative terminals 124 and 126 can charge and discharge the power storage device 110.
  • the conductor 114 also functions as a heat radiating plate for releasing the heat generated in the power storage module 112.
  • the conductor 114 may have higher thermal conductivity than a contact portion (for example, the contact surface 112a) with the conductor 114 in the power storage module 112.
  • a through-hole 114a extending in the direction intersecting the stacking direction (Y-axis direction) is provided inside the conductor 114.
  • the through-hole 114a communicates linearly from one side surface 114d (see FIG. 14) facing each other in the conductor 114 to the other side surface 114f (see FIG. 14).
  • the conductor 114 is provided with a plurality of through holes 114a.
  • the plurality of through holes 114a are arranged in the stacking direction and the direction (X-axis direction) intersecting the stacking direction.
  • a gaseous refrigerant such as air passes through such a through-hole 114a
  • heat generated in the power storage module 112 can be efficiently released to the outside.
  • the size of the conductor 114, the material of the conductor 114, the size of the through hole 114a, the number of the through holes 114a, and the like are appropriately adjusted so that the temperature of the power storage device 110 does not exceed 50 ° C., for example.
  • a device that actively circulates (circulates) air through the through hole 114 a may be provided in the power storage module 112. Moreover, in this embodiment, the extending direction of the through-hole 114a formed in the conductor 114 is the same in all the conductors 114 arranged in the stacking direction.
  • the power storage device 110 can include a constraining member 115 that constrains alternately stacked power storage modules 112 and conductors 114 in the stacking direction.
  • the restraining member 115 includes a pair of restraining plates 116 and 117 and a connecting member (bolt 118 and nut 120) for joining the restraining plates 116 and 117 to each other.
  • an insulating film 122 such as a resin film is disposed between the restraining plates 116 and 117 and the conductor 114.
  • Each constraining plate 116, 117 is made of metal such as iron, for example.
  • each of the restraining plates 116 and 117 and the insulating film 122 has, for example, a rectangular shape.
  • the insulating film 122 is larger than the conductor 114, and the restraining plates 116 and 117 are larger than the power storage module 112.
  • an insertion hole 116 a through which the shaft portion of the bolt 118 is inserted is provided at an edge of the restraining plate 116 at a position outside the power storage module 112.
  • an insertion hole 117 a through which the shaft portion of the bolt 118 is inserted is provided at the edge of the restraining plate 117 at a position outside the power storage module 112.
  • the insertion hole 116a and the insertion hole 117a are located at the corners of the restraint plates 116, 117.
  • One constraining plate 116 is abutted against the conductor 114 connected to the negative electrode terminal 126 via the insulating film 122, and the other constraining plate 117 applies the insulating film 122 to the conductor 114 connected to the positive electrode terminal 124.
  • the bolt 118 is passed through the insertion hole 116a and the insertion hole 117a sequentially from one restraint plate 116 side to the other restraint plate 117 side. 120 is screwed together. Accordingly, the insulating film 122, the conductor 114, and the power storage module 112 are sandwiched and unitized, and a restraining load is applied in the stacking direction.
  • the power storage module 112 includes a stacked body 130 in which a plurality of bipolar electrodes 132 are stacked.
  • the stacked body 130 When viewed from the stacking direction of the bipolar electrode 132, the stacked body 130 has, for example, a rectangular shape.
  • a separator 140 may be disposed between the bipolar electrodes 132 adjacent in the stacking direction.
  • the bipolar electrode 132 is provided on the electrode plate 134, the positive electrode layer 136 (positive electrode) provided on one surface (first surface) of the electrode plate 134, and the other surface (second surface) of the electrode plate 134.
  • a negative electrode layer 138 negative electrode).
  • the positive electrode layer 136 of one bipolar electrode 132 faces the negative electrode layer 138 of one bipolar electrode 132 adjacent in the stacking direction with the separator 140 interposed therebetween, and the negative electrode layer 138 of one bipolar electrode 132 is It faces the positive electrode layer 136 of the other bipolar electrode 132 adjacent in the stacking direction with the separator 140 interposed therebetween.
  • an electrode plate 134 (negative electrode termination electrode) having a negative electrode layer 138 disposed on the inner surface is disposed at one end of the laminate 130, and a positive electrode layer 136 is disposed on the inner surface at the other end.
  • An electrode plate 134 (positive terminal electrode) is disposed.
  • the negative electrode layer 138 of the negative electrode side termination electrode is opposed to the positive electrode layer 136 of the uppermost bipolar electrode 132 with the separator 140 interposed therebetween.
  • the positive electrode layer 136 of the positive electrode side termination electrode faces the negative electrode layer 138 of the lowermost bipolar electrode 132 with the separator 140 interposed therebetween.
  • the electrode plates 134 of these termination electrodes are respectively connected to adjacent conductors 114 (see FIG. 10).
  • the power storage module 112 includes a frame 150 (seal portion) that holds the peripheral edge 134a of the electrode plate 134 on the side surface 130a of the stacked body 130 that extends in the stacking direction of the bipolar electrodes 132.
  • the frame 150 is configured to surround the side surface 130 a of the stacked body 130.
  • the frame 150 has, for example, a rectangular shape when viewed from the stacking direction of the bipolar electrodes 132. In this case, the frame 150 is composed of four rectangular surfaces.
  • the frame 150 includes a first resin portion 152 (first seal portion) that holds the peripheral portion 134a of the electrode plate 134 and a second resin portion 154 that is provided around the first resin portion 152 when viewed from the stacking direction. (Second seal part).
  • the first resin portion 152 constituting the inner wall of the frame 150 is provided from one surface (surface on which the positive electrode layer 136 is formed) of the electrode plate 134 of each bipolar electrode 132 to the end surface of the electrode plate 134 in the peripheral portion 134a. ing. When viewed from the stacking direction of the bipolar electrodes 132, each first resin portion 152 is provided over the entire periphery 134 a of the electrode plate 134 of each bipolar electrode 132. The first resin portions 152 adjacent in the stacking direction are welded to each other on the surface extending outside the other surface (surface on which the negative electrode layer 138 is formed) of the electrode plate 134 of each bipolar electrode 132.
  • the peripheral portion 134 a of the electrode plate 134 of each bipolar electrode 132 is buried and held in the first resin portion 152.
  • the peripheral portion 134 a of the electrode plate 134 of each bipolar electrode 132 the peripheral portion 134 a of the electrode plate 134 disposed at both ends of the laminated body 130 is also held in a state of being buried in the first resin portion 152.
  • the second resin portion 154 constituting the outer wall of the frame 150 is a cylindrical portion that extends over the entire length of the multilayer body 130 in the lamination direction of the bipolar electrode 132.
  • the second resin portion 154 covers the outer surface of the first resin portion 152 extending in the stacking direction of the bipolar electrode 132.
  • the second resin portion 154 is welded to the outer surface of the first resin portion 152 on the inner surface that extends in the stacking direction of the bipolar electrode 132.
  • the electrode plate 134 is, for example, a rectangular metal foil made of nickel.
  • the peripheral portion 134 a of the electrode plate 134 is an uncoated region where the positive electrode active material and the negative electrode active material are not coated, and the uncoated region is buried in the first resin portion 152 constituting the inner wall of the frame 150. It is an area to be held.
  • Examples of the positive electrode active material constituting the positive electrode layer 136 include nickel hydroxide.
  • Examples of the negative electrode active material constituting the negative electrode layer 138 include a hydrogen storage alloy.
  • the formation region of the negative electrode layer 138 on the other surface of the electrode plate 134 is slightly larger than the formation region of the positive electrode layer 136 on one surface of the electrode plate 134.
  • the electrode plate 134 may be made of a conductive resin.
  • the separator 140 is formed in a sheet shape, for example.
  • Examples of the material forming the separator 140 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), and a woven fabric and a nonwoven fabric made of polypropylene and methylcellulose.
  • the separator 140 may be reinforced with a vinylidene fluoride resin compound.
  • the separator 140 is not limited to a sheet shape, and may be a bag shape.
  • the frame 150 (the first resin portion 152 and the second resin portion 154) is formed in a rectangular cylindrical shape by, for example, injection molding using an insulating resin.
  • the resin material constituting the frame 150 include polypropylene (PP), polyphenylene sulfide (PPS), and modified polyphenylene ether (modified PPE).
  • FIG. 12 is a side view of a part of the power storage device of FIG. 10 as viewed from the direction A
  • FIG. 13 is a view of the power storage device of FIG. 12 from the direction in which the end portion of the through hole formed in the conductor can be seen from the front.
  • FIG. 12 is the distance between the second resin portions 154 in the power storage modules 112, 112 adjacent to each other in the stacking direction, and faces the end portion 114b (end portion 114c) of the through hole 114a in the extending direction.
  • the distance of the 1st part P1 to perform is set to 1st distance G11. Further, as shown in FIG.
  • the first distance G11 in the first portion P1 is longer than the second distance G12 in the second portion P2 (G11> G12).
  • the second resin portions 154 and 154 of the power storage modules 112 and 112 adjacent to each other in the stacking direction are in contact with each other. That is, the second distance G12 in the second portion P2 is 0 (zero).
  • the height G2 of the through hole 114a may be equal to or greater than the first distance G11 in the first portion P1.
  • One of the power storage modules 112 and 112 adjacent to each other in the stacking direction is formed with a convex portion 154b at a portion where the second resin portions 154 and 154 are in contact with each other, and the power storage modules 112 and 112 adjacent to each other in the stacking direction.
  • a concave portion 154a that covers the convex portion 154b is formed at a portion where the second resin portions 154 and 154 contact each other.
  • the one part or all part of the said convex part 154b and the recessed part 154a is mutually contacting in the state elastically deformed.
  • the first distance G11 (see FIG. 12) between the second resin portions 154 and 154 in the first portion P1 facing the end portion 114b (end portion 114c) of the through hole 114a passes through. It is longer than the second distance G12 (see FIG. 13) of the second portion P2 that does not face the end portion 114b (end portion 114c) of the hole 114a. Accordingly, it is possible to suppress leakage of cooling air due to circulation of cooling air other than the through hole 114a while securing a passage for the cooling air flowing through the through hole 114a. As a result, efficient heat dissipation becomes possible.
  • the second resin portions 154 and 154 of the power storage modules 112 and 112 adjacent to each other in the stacking direction are in contact with each other. Further, it is possible to effectively suppress the cooling air leakage due to the circulation of the cooling air other than the through hole 114a.
  • the second resin portions 154 and 154 of the power storage modules 112 and 112 adjacent to each other in the stacking direction are in contact with each other in an elastically deformed state.
  • the dimensional tolerance in the direction (Z-axis direction) can be absorbed.
  • one of the power storage modules 112 and 112 adjacent to each other in the stacking direction has a convex portion 154 b at a portion where the second resin portions 154 and 154 are in contact with each other.
  • a concave portion 154a that covers the convex portion 154b is formed at a portion where the second resin portions 154 and 154 are in contact with each other. Also in this case, for example, a dimensional tolerance in the height direction of the conductor 114 can be absorbed.
  • the extending direction of the through holes 114a formed in the conductor 114 is the same in all the conductors 114 arranged in the stacking direction. For this reason, the workability
  • the frame 150 covers the first resin portion 152 in the form of a frame joined to the peripheral edge portion 134a of the electrode plate 134 and the outer peripheral surface of the first resin portion 152, and the first And a second resin portion 154 that integrally holds the resin portion 152. For this reason, the sealing property of the electrolyte solution in the electrical storage module 112 can be improved.
  • the present invention is not limited to the above embodiment.
  • the power storage device 10 may further include a member that electrically connects the power storage modules 12 to each other.
  • the cooling member 14 may not have conductivity. Therefore, the cooling member 14 can be made of various materials.
  • the cooling member 14 is made of an insulating material, it is possible to prevent a short circuit between the cooling members 14 through the refrigerant even when a conductive refrigerant such as water is used. Even when the cooling member 14 has conductivity, for example, if the cooling member 14 and the refrigerant are electrically insulated from each other by covering the inner surface of the flow path 15a with an insulator, It is possible to prevent a short circuit between the cooling members 14.
  • the liquid injection port 50a may be provided on each of the pair of first side surfaces 12b.
  • a plurality of liquid injection ports 50a may be provided in one first side surface 12b and arranged in the third direction D3. According to such a plurality of liquid injection ports 50a, it is possible to shorten the time required for injection of the electrolytic solution.
  • the direction in which the opening 15d faces and the direction in which the liquid injection port 50a faces need only be different from each other, and need not necessarily be orthogonal.
  • the shape of the flow path 15a is not limited.
  • the flow path 15a is not linear and may be bent.
  • the openings 15d at both ends thereof can be concentrated on one second side face 14c, for example.
  • the liquid injection port 50a may be provided on the other second side surface 14c side (that is, the other second side portion 51b).
  • the direction toward the opening 15d and the direction toward the liquid injection port 50a are different from each other and are opposite to each other, and thus the opening 15d is not covered by the protruding region 52.
  • coolant can be distribute
  • the cooling member 14 only needs to be provided with the flow path 15a.
  • the cooling member 14 does not have any one of the pair of plate members 15b and has a comb-teeth shape when viewed from the third direction D3. It may be. That is, the flow path 15a may be opened not only in the penetration direction but also in a direction intersecting the penetration direction.
  • the cooling member 14 may be the same as or larger than the power storage module 12 when viewed from the first direction D1. In this case, the cooling efficiency by the cooling member 14 can be improved. Moreover, each restraint plate 16A, 16B may be the same as the electrical storage module 12, the cooling member 14, and the insulating film 22, or smaller than it, seeing from the 1st direction D1.
  • both contact surfaces of the power storage modules 112 and 112 adjacent to each other in the stacking direction may be flat surfaces.
  • a convex portion may be formed on at least one of the contact surfaces of the power storage modules 112 and 112 adjacent to each other in the stacking direction. In this case, the second distance G12 in the second portion P2 is 0 (zero).
  • the first distance G11 in the first portion P1 is longer than the second distance G12 in the second portion P2 (G11> G12), so that the cooling air flowing through the through hole 114a Cooling air leakage due to the circulation of cooling air in addition to the flow path can be suppressed while securing the passage.
  • the second distance G12 that is the distance of the second portion P2 along the extending direction of the through hole 114a has been described as an example of 0 (zero).
  • the second distance G12 may be greater than 0 (zero) and smaller than the first distance G11. Even in this case, leakage of the cooling air due to the circulation of the cooling air in addition to the flow path can be suppressed while ensuring the passage of the cooling air flowing through the through hole 114a.
  • the through hole 114 a formed in the conductor 114 communicates from one side surface 114 d facing each other to the other side surface 114 f in the conductor 114.
  • one side surface 14e or one side surface 14g may communicate with one adjacent side surface 114f (side surface 114d).
  • the through hole 114a formed in the conductor 114 is described as an example of the flow path through which the cooling air flows.
  • a groove is formed on at least one surface.
  • a flow path through which cooling air flows may be formed by bringing the conductor 114 into contact with the electrode plate 134 of the termination electrode.
  • the power storage device 110 is described as an example of a nickel hydride secondary battery, but may be a lithium ion secondary battery.
  • the positive electrode active material is, for example, a composite oxide, metallic lithium, sulfur or the like.
  • the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ⁇ x ⁇ 1.5 ) And the like, as well as boron-added carbon.
  • bipolar electrodes 134 ... electrode plates, 134a ... peripheral parts, 136 ... positive electrode layer (positive electrode), 138 ... negative electrode layer (negative electrode) , 150 ... frame (seal part), 152 ... first resin part (first seal part), 154 ... second resin part (second seal part), 154a ... concave part, 154b ... convex part, G11 ... first distance , G12 ... second distance, P1 The first part, P2 ... the second part.

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  • Electrochemistry (AREA)
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  • Engineering & Computer Science (AREA)
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Abstract

A power storage device, provided with a power storage module and a cooling member for cooling the power storage module by channeling a refrigerant. The power storage module is provided with a laminate and a frame body for holding the edge part of an electrode plate on a side surface of the laminate extending in a first direction. The cooling member is disposed alongside the laminate in the first direction. The frame body has: a body region covering the side surface, the body region being provided with an injection hole for injecting an electrolyte into the frame body; and a projecting region projecting from the body region so as to be set away from the injection hole in the first direction. The cooling member is provided with an opening for allowing the refrigerant to flow into the cooling member or for allowing the refrigerant to flow out from the interior of the cooling member. The injection hole and the opening face different directions.

Description

蓄電装置Power storage device
　本発明は、蓄電装置に関する。 The present invention relates to a power storage device.
　積層された複数のバイポーラ電極を有するバイポーラ電池が知られている。各バイポーラ電極は、電極板と、電極板の一方の面に設けられた正極と、電極板の他方の面に設けられた負極と、を含んでいる。例えば、特許文献１及び特許文献２には、バイポーラ電池を備える蓄電装置が開示されている。これらの蓄電装置では、複数のバイポーラ電池を組電池化することで、高容量化及び高出力化が可能となる。 A bipolar battery having a plurality of stacked bipolar electrodes is known. Each bipolar electrode includes an electrode plate, a positive electrode provided on one surface of the electrode plate, and a negative electrode provided on the other surface of the electrode plate. For example, Patent Literature 1 and Patent Literature 2 disclose a power storage device including a bipolar battery. In these power storage devices, high capacity and high output can be achieved by forming a plurality of bipolar batteries into an assembled battery.
特開２００４－３２７３７４号公報JP 2004-327374 A 特開２０１０－０８６８７４号公報JP 2010-086874 A 特開２００３－１７１２７号公報JP 2003-17127 A
　上記蓄電装置では、充放電時にバイポーラ電池において熱が発生する。そこで、バイポーラ電池を冷却するために冷却部材を用いることが考えられる。冷却部材として、例えば、冷媒を流通させることで冷却効果を得る方式の冷却部材がある。例えば、特許文献３には、複数の蓄電モジュールが電気的に並列に接続され、互いに隣り合う蓄電モジュール同士を電気的に接続する導電体に放熱路を設けた蓄電装置が開示されている。このような冷却部材を用いる場合、冷媒を効率よく流通させることにより、蓄電モジュールの放熱性を向上させることが望まれる。 In the above power storage device, heat is generated in the bipolar battery during charging and discharging. Therefore, it is conceivable to use a cooling member to cool the bipolar battery. As a cooling member, for example, there is a cooling member that obtains a cooling effect by circulating a refrigerant. For example, Patent Document 3 discloses a power storage device in which a plurality of power storage modules are electrically connected in parallel and a heat dissipation path is provided in a conductor that electrically connects adjacent power storage modules. When such a cooling member is used, it is desired to improve the heat dissipation of the power storage module by efficiently circulating the refrigerant.
　本発明の一側面は、蓄電モジュールの放熱性を向上させることができる蓄電装置を提供する。 One aspect of the present invention provides a power storage device that can improve heat dissipation of a power storage module.
　本発明の一側面に係る蓄電装置は、第１面及び第１面とは反対側の第２面を有する電極板と、第１面に設けられた正極と、第２面に設けられた負極と、をそれぞれ含む複数のバイポーラ電極が第１方向において積層された蓄電モジュールと、冷媒の流通により蓄電モジュールを冷却する冷却部材と、を備える。蓄電モジュールは、積層された複数のバイポーラ電極を有する積層体と、積層体の第１方向に延在する側面において電極板の縁部を保持する枠体と、を備える。冷却部材は、第１方向において積層体と並んで配置される。枠体は、側面を覆うと共に、枠体内に電解液を注入するための注液口が設けられた本体領域と、第１方向において注液口から離れるように本体領域から突出する突出領域と、を有する。冷却部材には、冷却部材の内部に冷媒を流入させるため、又は冷却部材の内部から冷媒を流出させるための開口が設けられる。注液口の向く方向及び開口の向く方向は、互いに異なっている。 A power storage device according to one aspect of the present invention includes an electrode plate having a first surface and a second surface opposite to the first surface, a positive electrode provided on the first surface, and a negative electrode provided on the second surface. Are stored in the first direction, and a cooling member that cools the power storage module by circulation of the refrigerant. The power storage module includes a laminated body having a plurality of laminated bipolar electrodes, and a frame body that holds an edge portion of the electrode plate on a side surface extending in the first direction of the laminated body. The cooling member is arranged side by side with the stacked body in the first direction. The frame body covers the side surface and is provided with a main body region provided with a liquid injection port for injecting an electrolyte into the frame body, a protruding region protruding from the main body region so as to be separated from the liquid injection port in the first direction, Have The cooling member is provided with an opening for allowing the refrigerant to flow into the cooling member or for allowing the refrigerant to flow out of the cooling member. The direction of the liquid inlet and the direction of the opening are different from each other.
　本発明の一側面に係る蓄電装置では、冷却部材は、第１方向において積層体と並んで配置されている。蓄電モジュールにおける枠体は、積層体の側面を覆うと共に注液口が設けられた本体領域と、第１方向において注液口から離れるように本体領域から突出する突出領域と、を有している。このように突出領域が、積層体の側面を覆う本体領域から第１方向において突出するため、冷却部材が突出領域によって覆われる。ここで、本体領域に設けられた注液口の向く方向、及び冷却部材に設けられた開口の向く方向は、互いに異なっている。したがって、開口は突出領域によって覆われない。これにより、開口を通じて冷媒を効率よく流通させることができるので、蓄電モジュールの放熱性を向上させることができる。 In the power storage device according to one aspect of the present invention, the cooling member is arranged side by side with the stacked body in the first direction. The frame in the power storage module has a main body region that covers the side surface of the laminate and is provided with a liquid injection port, and a protruding region that protrudes from the main body region so as to be separated from the liquid injection port in the first direction. . Thus, since a protrusion area | region protrudes in a 1st direction from the main body area | region which covers the side surface of a laminated body, a cooling member is covered with a protrusion area | region. Here, the direction of the liquid injection port provided in the main body region and the direction of the opening provided in the cooling member are different from each other. Thus, the opening is not covered by the protruding area. Thereby, since a refrigerant | coolant can be distribute | circulated efficiently through opening, the heat dissipation of an electrical storage module can be improved.
　本発明の一側面に係る蓄電装置において、注液口の向く方向及び開口の向く方向は、互いに直交していてもよい。この場合、開口を更に突出領域から開放された状態とすることができる。 In the power storage device according to one aspect of the present invention, the direction in which the liquid injection port faces and the direction in which the opening faces may be orthogonal to each other. In this case, the opening can be further opened from the protruding region.
　本発明の一側面に係る蓄電装置において、冷却部材には、冷媒を流通させる複数の流路が設けられてもよい。複数の流路は、第１方向に交差する第２方向に配列されると共に、第１方向及び第２方向に交差する第３方向に延在していてもよい。この場合、冷却部材の内部に冷媒を更に効率よく流通させることができるので、蓄電モジュールの放熱性を更に向上させることができる。 In the power storage device according to one aspect of the present invention, the cooling member may be provided with a plurality of flow paths for circulating the refrigerant. The plurality of flow paths may be arranged in a second direction that intersects the first direction, and may extend in a third direction that intersects the first direction and the second direction. In this case, since the refrigerant can be circulated more efficiently inside the cooling member, the heat dissipation of the power storage module can be further improved.
　本発明の一側面に係る蓄電装置において、冷却部材は、複数の流路を第１方向に挟む一対の板部材を有していてもよい。この場合、板部材を全体的に蓄電モジュールに当接させることができるので、蓄電モジュールに対して局所的な圧力が加わるのを抑制可能となる。 In the power storage device according to one aspect of the present invention, the cooling member may include a pair of plate members that sandwich the plurality of flow paths in the first direction. In this case, since the plate member can be brought into contact with the power storage module as a whole, it is possible to suppress application of local pressure to the power storage module.
　本発明の一側面に係る蓄電装置において、冷却部材は、板状を呈してもよい。冷却部材には、冷却部材を第１方向に交差する方向において貫通する貫通孔が設けられていてもよい。この場合、冷却部材の内部に冷媒を更に効率よく流通させることができるので、蓄電モジュールの放熱性を更に向上させることができる。 In the power storage device according to one aspect of the present invention, the cooling member may have a plate shape. The cooling member may be provided with a through hole that penetrates the cooling member in a direction intersecting the first direction. In this case, since the refrigerant can be circulated more efficiently inside the cooling member, the heat dissipation of the power storage module can be further improved.
　本発明の一側面に係る蓄電装置において、冷却部材は、導電性を有していてもよい。この場合、第１方向に隣り合う蓄電モジュール同士を冷却部材によって電気的に接続することができる。 In the power storage device according to one aspect of the present invention, the cooling member may have conductivity. In this case, the power storage modules adjacent in the first direction can be electrically connected by the cooling member.
　本発明の一側面に係る蓄電装置において、冷媒は、絶縁性を有していてもよい。この場合、冷却部材同士の短絡が冷媒を通じて生じることを防止できる。 In the power storage device according to one aspect of the present invention, the refrigerant may have an insulating property. In this case, it is possible to prevent a short circuit between the cooling members through the refrigerant.
　本発明の一側面に係る蓄電装置は、一方向に配列された複数の蓄電モジュールと、互いに隣り合う蓄電モジュールの両方に接触させた状態で配置される導電体と、を備える。蓄電モジュールは、第１面及び第１面とは反対側の第２面を有する電極板と、第１面に設けられた正極と、第２面に設けられた負極と、をそれぞれ含む複数のバイポーラ電極を、セパレータを介して積層してなる積層体と、複数のバイポーラ電極の周縁部を保持すると共に積層体の側面を形成するシール部と、を有する。導電体には、一方向に交差する方向に延在する流路が形成されている。互いに隣り合う蓄電モジュールにおけるシール部同士の距離であって、流路の延在方向における流路の端部に対向する第一部分の第一距離は、端部に対向しない第二部分の第二距離よりも長い。 The power storage device according to one aspect of the present invention includes a plurality of power storage modules arranged in one direction and a conductor disposed in contact with both of the power storage modules adjacent to each other. The power storage module includes a plurality of first electrodes and an electrode plate having a second surface opposite to the first surface, a positive electrode provided on the first surface, and a negative electrode provided on the second surface. It has a laminated body formed by laminating bipolar electrodes via separators, and a seal portion that holds the peripheral portions of the plurality of bipolar electrodes and forms the side surfaces of the laminated body. The conductor is formed with a flow path extending in a direction crossing one direction. The distance between the seal portions in the storage modules adjacent to each other, and the first distance of the first portion facing the end portion of the flow channel in the extending direction of the flow channel is the second distance of the second portion not facing the end portion. Longer than.
　上記蓄電装置では、流路端部に対向する第一部分におけるシール部同士の第一距離が、流路端部に対向しない第二部分の第二距離よりも長い。これにより、上記流路を介して流通する冷却風の通り道を確保しつつ、上記流路以外に冷却風が流通することによる冷却風漏れを抑制することができる。この結果、効率的な放熱が可能となる。 In the above power storage device, the first distance between the seal portions in the first portion facing the channel end is longer than the second distance of the second portion not facing the channel end. Thereby, it is possible to suppress leakage of cooling air due to circulation of cooling air in addition to the flow channel while securing a passage of cooling air flowing through the flow channel. As a result, efficient heat dissipation becomes possible.
　本発明の一側面に係る蓄電装置では、上記流路は、直線状に延在してもよく、第二部分は、端部に対向しない部分であると共に流路の延在方向に沿う部分であってもよい。上記蓄電装置では、容易に導電体に流路を形成することができる。 In the power storage device according to one aspect of the present invention, the flow path may extend in a straight line, and the second portion is a portion that does not face the end portion and that extends along the direction in which the flow path extends. There may be. In the above power storage device, the flow path can be easily formed in the conductor.
　本発明の一側面に係る蓄電装置では、第二部分では、互いに隣り合う蓄電モジュールのシール部同士が互いに接触していてもよい。上記蓄電装置では、流路以外に冷却風が流通することによる冷却風漏れを効果的に抑制することができる。 In the power storage device according to one aspect of the present invention, in the second portion, the seal portions of the power storage modules adjacent to each other may be in contact with each other. In the power storage device, cooling air leakage due to circulation of cooling air in addition to the flow path can be effectively suppressed.
　本発明の一側面に係る蓄電装置では、互いに隣り合う蓄電モジュールのシール部同士は、弾性変形した状態で互いに接触していてもよい。上記蓄電装置では、例えば、導電体の高さ方向における寸法公差を吸収することができる。 In the power storage device according to one aspect of the present invention, the seal portions of the power storage modules adjacent to each other may be in contact with each other in an elastically deformed state. In the power storage device, for example, dimensional tolerance in the height direction of the conductor can be absorbed.
　本発明の一側面に係る蓄電装置では、互いに隣り合う蓄電モジュールの少なくとも一方には、シール部同士が接触する部分に凸部が形成されていてもよい。上記蓄電装置では、シール部同士が接触する部分において容易に弾性変形させることができる。 In the power storage device according to one aspect of the present invention, at least one of the power storage modules adjacent to each other may have a convex portion at a portion where the seal portions are in contact with each other. In the power storage device, it can be easily elastically deformed at a portion where the seal portions are in contact with each other.
　本発明の一側面に係る蓄電装置では、互いに隣り合う蓄電モジュールの一方には、シール部同士が接触する部分に凸部が形成されており、互いに隣り合う蓄電モジュールの他方には、シール部同士が接触する部分に凸部を覆う凹部が形成されていてもよい。上記蓄電装置では、例えば、導電体の高さ方向における寸法公差を吸収することができる。 In the power storage device according to one aspect of the present invention, one of the storage modules adjacent to each other has a convex portion formed in a portion where the seal portions contact each other, and the other of the storage modules adjacent to each other includes A concave portion that covers the convex portion may be formed in a portion that contacts the surface. In the power storage device, for example, dimensional tolerance in the height direction of the conductor can be absorbed.
　本発明の一側面に係る蓄電装置では、導電体に形成される流路の延在方向が、一方向に配列される全ての導電体において一致していてもよい。この蓄電装置では、組み付け時の作業性を向上させることができる。 In the power storage device according to one aspect of the present invention, the extending direction of the flow path formed in the conductor may be the same in all the conductors arranged in one direction. With this power storage device, workability during assembly can be improved.
　本発明の一側面に係る蓄電装置では、シール部は、電極板の周縁部に接合される枠体状の第一シール部と、第一シール部の外周面を覆い、第一シール部を一体的に保持する第二シール部と、を有していてもよい。上記蓄電装置では、蓄電モジュールにおける電解液の密閉性を高めることができる。 In the power storage device according to one aspect of the present invention, the seal portion covers the outer peripheral surface of the frame-shaped first seal portion joined to the peripheral portion of the electrode plate and the first seal portion, and the first seal portion is integrated. And a second seal portion that holds the target. In the power storage device, the sealing performance of the electrolyte solution in the power storage module can be improved.
　本発明の一側面によれば、蓄電モジュールの放熱性を向上させることができる蓄電装置を提供することができる。 According to one aspect of the present invention, it is possible to provide a power storage device that can improve the heat dissipation of the power storage module.
第１実施形態に係る蓄電装置を示す斜視図である。1 is a perspective view showing a power storage device according to a first embodiment. 図１のII－II線に沿っての断面図である。FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 図１に示される蓄電モジュールを示す断面図である。It is sectional drawing which shows the electrical storage module shown by FIG. 図１に示される蓄電モジュールを示す斜視図である。It is a perspective view which shows the electrical storage module shown by FIG. 図４の蓄電モジュールの一部を拡大した側面図である。It is the side view to which a part of electrical storage module of FIG. 4 was expanded. 第２樹脂部の形成方法を説明するための断面図である。It is sectional drawing for demonstrating the formation method of a 2nd resin part. 図１に示される冷却部材を示す斜視図である。It is a perspective view which shows the cooling member shown by FIG. 比較例に係る蓄電装置を示す側面図である。It is a side view which shows the electrical storage apparatus which concerns on a comparative example. 図８の蓄電装置の一部を拡大した側面図である。It is the side view to which a part of electrical storage apparatus of FIG. 8 was expanded. 第２実施形態に係る蓄電装置を示す概略断面図である。It is a schematic sectional drawing which shows the electrical storage apparatus which concerns on 2nd Embodiment. 図１０の蓄電装置に含まれる蓄電モジュールを示す概略断面図である。It is a schematic sectional drawing which shows the electrical storage module contained in the electrical storage apparatus of FIG. 図１０の蓄電装置の一部をＡ方向から見た側面図である。It is the side view which looked at a part of power storage device of Drawing 10 from the A direction. 図１２の蓄電装置を導電体に形成された貫通孔の端部が正面に見える方向から見た図である。It is the figure which looked at the electrical storage apparatus of FIG. 12 from the direction where the edge part of the through-hole formed in the conductor can be seen in the front. 図１２に示す蓄電装置をＸＩＶ－ＸＩＶ線に沿って切断したときの積層方向から見た断面図である。FIG. 13 is a cross-sectional view seen from the stacking direction when the power storage device shown in FIG. 12 is cut along the line XIV-XIV. 変形例に係る蓄電装置を導電体に形成された貫通孔の端部が正面に見える方向から見た図である。It is the figure which looked at the electrical storage apparatus which concerns on a modification from the direction which the edge part of the through-hole formed in the conductor can be seen in the front. 変形例に係る蓄電装置を導電体に形成された貫通孔の端部が正面に見える方向から見た図である。It is the figure which looked at the electrical storage apparatus which concerns on a modification from the direction which the edge part of the through-hole formed in the conductor can be seen in the front.
　以下、添付図面を参照しながら本発明の実施形態が詳細に説明される。図面の説明において、同一又は同等の要素には同一符号が用いられ、重複する説明は省略される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and redundant descriptions are omitted.
（第１実施形態）
　図１は、第１実施形態に係る蓄電装置を示す斜視図である。図２は、図１のII－II線に沿っての断面図である。図１及び図２に示される蓄電装置１０は、例えばフォークリフト、ハイブリッド自動車、及び電気自動車等の各種車両のバッテリとして用いられる。蓄電装置１０は、複数（本実施形態では３つ）の蓄電モジュール１２と、複数（本実施形態では４つ）の冷却部材１４と、拘束部材１６と、を備える。蓄電装置１０が備える蓄電モジュール１２及び冷却部材１４の数は、それぞれ１つであってもよい。 (First embodiment)
FIG. 1 is a perspective view showing the power storage device according to the first embodiment. FIG. 2 is a sectional view taken along line II-II in FIG. The power storage device 10 shown in FIGS. 1 and 2 is used as a battery for various vehicles such as forklifts, hybrid vehicles, and electric vehicles. The power storage device 10 includes a plurality (three in the present embodiment) of power storage modules 12, a plurality (four in the present embodiment) of cooling members 14, and a restraining member 16. The number of power storage modules 12 and cooling members 14 included in the power storage device 10 may be one each.
　蓄電モジュール１２は、例えば複数のバイポーラ電極３２（図３参照）が第１方向Ｄ１（一方向）において積層されたバイポーラ電池である。蓄電モジュール１２は、例えばニッケル水素二次電池、及びリチウムイオン二次電池等の二次電池であるが、電気二重層キャパシタであってもよい。以下の説明では、ニッケル水素二次電池を例示する。 The power storage module 12 is, for example, a bipolar battery in which a plurality of bipolar electrodes 32 (see FIG. 3) are stacked in the first direction D1 (one direction). The power storage module 12 is a secondary battery such as a nickel hydride secondary battery or a lithium ion secondary battery, but may be an electric double layer capacitor. In the following description, a nickel metal hydride secondary battery is illustrated.
　冷却部材１４は、冷媒の流通により蓄電モジュール１２を冷却する。冷却部材１４は、第１方向Ｄ１において蓄電モジュール１２の積層体３０（図３参照）と交互に並んで配置（積層）されている。冷却部材１４は、第１方向Ｄ１で隣り合う２つの蓄電モジュール１２の間に配置されていると共に、第１方向Ｄ１において両端に位置する蓄電モジュール１２の外側にもそれぞれ配置されている。 The cooling member 14 cools the power storage module 12 by circulation of the refrigerant. The cooling member 14 is arranged (laminated) alternately and side by side with the stacked body 30 (see FIG. 3) of the power storage module 12 in the first direction D1. The cooling member 14 is disposed between two power storage modules 12 adjacent in the first direction D1, and is also disposed outside the power storage modules 12 located at both ends in the first direction D1.
　冷却部材１４は、導電性を有し、例えば金属等の導電材料により形成されている。冷却部材１４は、第１方向Ｄ１において隣り合う蓄電モジュール１２と電気的に接続される。これにより、複数の蓄電モジュール１２が第１方向Ｄ１において直列に接続される。第１方向Ｄ１において、一端に位置する冷却部材１４には正極端子２４が接続されており、他端に位置する冷却部材１４には負極端子２６が接続されている。正極端子２４は、正極端子２４が接続される冷却部材１４と一体であってもよい。負極端子２６は、負極端子２６が接続される冷却部材１４と一体であってもよい。正極端子２４及び負極端子２６は、第１方向Ｄ１に交差（ここでは、直交）する第２方向Ｄ２に延在している。これらの正極端子２４及び負極端子２６により、蓄電装置１０の充放電を実施できる。 The cooling member 14 has conductivity, and is formed of a conductive material such as metal, for example. The cooling member 14 is electrically connected to the power storage modules 12 adjacent in the first direction D1. Thereby, the some electrical storage module 12 is connected in series in the 1st direction D1. In the first direction D1, a positive electrode terminal 24 is connected to the cooling member 14 located at one end, and a negative electrode terminal 26 is connected to the cooling member 14 located at the other end. The positive terminal 24 may be integrated with the cooling member 14 to which the positive terminal 24 is connected. The negative electrode terminal 26 may be integrated with the cooling member 14 to which the negative electrode terminal 26 is connected. The positive electrode terminal 24 and the negative electrode terminal 26 extend in a second direction D2 that intersects (here, orthogonal) the first direction D1. The positive and negative terminals 24 and 26 can charge and discharge the power storage device 10.
　拘束部材１６は、蓄電モジュール１２及び冷却部材１４を第１方向Ｄ１に拘束するための部材である。拘束部材１６は、一対の拘束プレート１６Ａ，１６Ｂと、ボルト１８と、ナット２０と、を備える。ボルト１８及びナット２０は、拘束プレート１６Ａ，１６Ｂ同士を連結する連結部材である。各拘束プレート１６Ａ，１６Ｂと冷却部材１４との間には、例えば樹脂フィルム等の絶縁フィルム２２が配置される。各拘束プレート１６Ａ，１６Ｂは、例えば鉄等の金属により構成されている。 The restraining member 16 is a member for restraining the power storage module 12 and the cooling member 14 in the first direction D1. The restraining member 16 includes a pair of restraining plates 16 </ b> A and 16 </ b> B, a bolt 18, and a nut 20. The bolt 18 and the nut 20 are connecting members that connect the restraining plates 16A and 16B. An insulating film 22 such as a resin film is disposed between the restraining plates 16A and 16B and the cooling member 14, for example. Each restraint plate 16A, 16B is comprised, for example with metals, such as iron.
　第１方向Ｄ１から見て、蓄電モジュール１２、冷却部材１４、各拘束プレート１６Ａ，１６Ｂ及び絶縁フィルム２２は、例えば矩形状を呈し、それぞれの長手方向が第２方向Ｄ２、及びそれぞれの短手方向が第３方向Ｄ３となるように配置されている。第３方向Ｄ３は、第１方向Ｄ１及び第２方向Ｄ２に交差（ここでは、直交）する方向である。第１方向Ｄ１から見て、各拘束プレート１６Ａ，１６Ｂは、蓄電モジュール１２、冷却部材１４及び絶縁フィルム２２よりも大きい。第１方向Ｄ１から見て、蓄電モジュール１２及び絶縁フィルム２２は、冷却部材１４よりも大きい。 When viewed from the first direction D1, the power storage module 12, the cooling member 14, each of the restraining plates 16A and 16B, and the insulating film 22 have, for example, a rectangular shape, and each longitudinal direction is the second direction D2 and each short direction. Are arranged in the third direction D3. The third direction D3 is a direction that intersects (here, orthogonal) the first direction D1 and the second direction D2. As viewed from the first direction D1, each of the restraining plates 16A and 16B is larger than the power storage module 12, the cooling member 14, and the insulating film 22. The storage module 12 and the insulating film 22 are larger than the cooling member 14 when viewed from the first direction D1.
　拘束プレート１６Ａには、ボルト１８の軸部を第１方向Ｄ１に挿通させる複数の挿通孔１６Ａ１が設けられている。複数の挿通孔１６Ａ１は、拘束プレート１６Ａの第２方向Ｄ２の両端部及び第３方向Ｄ３の両端部において、第１方向Ｄ１から見て、蓄電モジュール１２、冷却部材１４及び絶縁フィルム２２の外側となる位置に設けられている。同様に、拘束プレート１６Ｂには、ボルト１８の軸部を第１方向Ｄ１に挿通させる複数の挿通孔１６Ｂ１が設けられている。複数の挿通孔１６Ｂ１は、拘束プレート１６Ｂの第２方向Ｄ２の両端部及び第３方向Ｄ３の両端部において、第１方向Ｄ１から見て、蓄電モジュール１２、冷却部材１４及び絶縁フィルム２２の外側となる位置に設けられている。 The restraint plate 16A is provided with a plurality of insertion holes 16A1 through which the shaft portion of the bolt 18 is inserted in the first direction D1. The plurality of insertion holes 16A1 are located at both ends of the restraint plate 16A in the second direction D2 and both ends of the third direction D3, as viewed from the first direction D1, and outside the power storage module 12, the cooling member 14, and the insulating film 22. It is provided in the position. Similarly, the constraining plate 16B is provided with a plurality of insertion holes 16B1 through which the shaft portion of the bolt 18 is inserted in the first direction D1. The plurality of insertion holes 16B1 are formed on the outer sides of the power storage module 12, the cooling member 14, and the insulating film 22 when viewed from the first direction D1 at both ends in the second direction D2 and both ends in the third direction D3 of the restraining plate 16B. It is provided in the position.
　一方の拘束プレート１６Ａは、負極端子２６に接続された冷却部材１４に絶縁フィルム２２を介して突き当てられ、他方の拘束プレート１６Ｂは、正極端子２４に接続された冷却部材１４に絶縁フィルム２２を介して突き当てられている。ボルト１８は、例えば一方の拘束プレート１６Ａ側から他方の拘束プレート１６Ｂ側に向かって挿通孔１６Ａ１及び挿通孔１６Ｂ１に順に通され、他方の拘束プレート１６Ｂから突出するボルト１８の先端には、ナット２０が螺合されている。これにより、絶縁フィルム２２、冷却部材１４及び蓄電モジュール１２が挟持されてユニット化されると共に、第１方向Ｄ１に拘束荷重が付加される。 One restraint plate 16 </ b> A is abutted against the cooling member 14 connected to the negative electrode terminal 26 via the insulating film 22, and the other restraint plate 16 </ b> B attaches the insulating film 22 to the cooling member 14 connected to the positive electrode terminal 24. Has been hit through. For example, the bolt 18 is passed through the insertion hole 16A1 and the insertion hole 16B1 sequentially from one restraint plate 16A side to the other restraint plate 16B side. Are screwed together. Accordingly, the insulating film 22, the cooling member 14, and the power storage module 12 are sandwiched and unitized, and a restraining load is applied in the first direction D1.
　図３は、図１に示される蓄電モジュールを示す断面図である。同図に示されるように、蓄電モジュール１２は、積層体３０を備える。積層体３０は、セパレータ４０を介して第１方向Ｄ１において積層された複数のバイポーラ電極３２を有する。バイポーラ電極３２は、電極板３４と、電極板３４の一方の面（第１面）に設けられた正極３６と、電極板３４の他方の面（第２面）に設けられた負極３８とを含む。積層体３０において、一のバイポーラ電極３２の正極３６は、セパレータ４０を挟んで第１方向Ｄ１において隣り合う一方のバイポーラ電極３２の負極３８と対向し、一のバイポーラ電極３２の負極３８は、セパレータ４０を挟んで第１方向Ｄ１において隣り合う他方のバイポーラ電極３２の正極３６と対向している。 FIG. 3 is a cross-sectional view showing the power storage module shown in FIG. As shown in the figure, the power storage module 12 includes a stacked body 30. The stacked body 30 includes a plurality of bipolar electrodes 32 stacked in the first direction D1 with the separator 40 interposed therebetween. The bipolar electrode 32 includes an electrode plate 34, a positive electrode 36 provided on one surface (first surface) of the electrode plate 34, and a negative electrode 38 provided on the other surface (second surface) of the electrode plate 34. Including. In the laminate 30, the positive electrode 36 of one bipolar electrode 32 faces the negative electrode 38 of one bipolar electrode 32 adjacent in the first direction D1 with the separator 40 interposed therebetween, and the negative electrode 38 of the one bipolar electrode 32 It faces the positive electrode 36 of the other bipolar electrode 32 that is adjacent in the first direction D1 with 40 interposed therebetween.
　第１方向Ｄ１において、積層体３０の一端には、内側面に負極３８が配置された電極板３４（負極側終端電極）が配置され、積層体３０の他端には、内側面に正極３６が配置された電極板３４（正極側終端電極）が配置される。負極側終端電極の負極３８は、セパレータ４０を介して最上層のバイポーラ電極３２の正極３６と対向している。正極側終端電極の正極３６は、セパレータ４０を介して最下層のバイポーラ電極３２の負極３８と対向している。これら終端電極の電極板３４はそれぞれ隣り合う冷却部材１４（図２参照）に接続される。 In the first direction D1, an electrode plate 34 (negative terminal electrode) having a negative electrode 38 disposed on the inner surface is disposed at one end of the stacked body 30, and a positive electrode 36 is disposed on the inner surface at the other end of the stacked body 30. Is disposed on the electrode plate 34 (positive terminal electrode). The negative electrode 38 of the negative electrode-side termination electrode faces the positive electrode 36 of the uppermost bipolar electrode 32 with the separator 40 interposed therebetween. The positive electrode 36 of the positive terminal electrode is opposed to the negative electrode 38 of the lowermost bipolar electrode 32 with the separator 40 interposed therebetween. The electrode plates 34 of these termination electrodes are connected to adjacent cooling members 14 (see FIG. 2).
　蓄電モジュール１２は、第１方向Ｄ１に延在する積層体３０の側面３０ａにおいて電極板３４の縁部３４ａを保持する枠体５０を備える。枠体５０は、積層体３０の側面３０ａを取り囲むように構成されている。枠体５０は、電極板３４の縁部３４ａを保持する第１樹脂部５３と、第１方向Ｄ１から見て第１樹脂部５３の周囲に設けられる第２樹脂部５４とを備え得る。 The power storage module 12 includes a frame 50 that holds the edge 34a of the electrode plate 34 on the side surface 30a of the stacked body 30 extending in the first direction D1. The frame body 50 is configured to surround the side surface 30 a of the stacked body 30. The frame 50 can include a first resin portion 53 that holds the edge portion 34a of the electrode plate 34, and a second resin portion 54 that is provided around the first resin portion 53 when viewed from the first direction D1.
　枠体５０の内壁を構成する第１樹脂部５３は、各バイポーラ電極３２の電極板３４の一方の面（正極３６が形成される面）から縁部３４ａにおける電極板３４の端面にわたって設けられている。第１方向Ｄ１から見て、各第１樹脂部５３は、各バイポーラ電極３２の電極板３４の縁部３４ａ全周にわたって設けられている。第１方向Ｄ１において隣り合う第１樹脂部５３同士は、各バイポーラ電極３２の電極板３４の他方の面（負極３８が形成される面）の外側に延在する面において溶着している。その結果、第１樹脂部５３には、各バイポーラ電極３２の電極板３４の縁部３４ａが埋没して保持されている。 The first resin portion 53 constituting the inner wall of the frame 50 is provided from one surface (surface on which the positive electrode 36 is formed) of the electrode plate 34 of each bipolar electrode 32 to the end surface of the electrode plate 34 at the edge portion 34a. Yes. As viewed from the first direction D1, each first resin portion 53 is provided over the entire circumference of the edge portion 34a of the electrode plate 34 of each bipolar electrode 32. The first resin portions 53 adjacent in the first direction D1 are welded on the surface extending outside the other surface (surface on which the negative electrode 38 is formed) of the electrode plate 34 of each bipolar electrode 32. As a result, the edge portion 34 a of the electrode plate 34 of each bipolar electrode 32 is buried and held in the first resin portion 53.
　各バイポーラ電極３２の電極板３４の縁部３４ａと同様に、積層体３０の両端に配置された電極板３４の縁部３４ａも第１樹脂部５３に埋没した状態で保持されている。これにより、第１方向Ｄ１に隣り合う電極板３４，３４間には、当該電極板３４，３４と第１樹脂部５３とによって気密に仕切られた内部空間（空間）Ｖが形成されている。当該内部空間Ｖには、例えば水酸化カリウム水溶液等のアルカリ溶液からなる電解液（不図示）が収容されている。 Similarly to the edge 34 a of the electrode plate 34 of each bipolar electrode 32, the edge 34 a of the electrode plate 34 disposed at both ends of the laminated body 30 is also held in a state of being buried in the first resin portion 53. Thus, an internal space (space) V that is airtightly partitioned by the electrode plates 34 and 34 and the first resin portion 53 is formed between the electrode plates 34 and 34 adjacent to each other in the first direction D1. In the internal space V, for example, an electrolytic solution (not shown) made of an alkaline solution such as an aqueous potassium hydroxide solution is accommodated.
　枠体５０の外壁を構成する第２樹脂部５４は、第１方向Ｄ１を軸方向として延在する筒状部である。第２樹脂部５４は、第１方向Ｄ１において積層体３０の全長にわたって延在する。第２樹脂部５４は、第１方向Ｄ１に延在する第１樹脂部５３の外側面を覆っている。第２樹脂部５４は、第１方向Ｄ１から見て内側において第１樹脂部５３に溶着されている。 The second resin portion 54 constituting the outer wall of the frame body 50 is a cylindrical portion that extends with the first direction D1 as the axial direction. The second resin portion 54 extends over the entire length of the stacked body 30 in the first direction D1. The second resin portion 54 covers the outer surface of the first resin portion 53 extending in the first direction D1. The second resin portion 54 is welded to the first resin portion 53 on the inner side when viewed from the first direction D1.
　電極板３４は、例えばニッケルからなる矩形の金属箔である。電極板３４の縁部３４ａは、正極活物質及び負極活物質が塗工されない未塗工領域となっており、当該未塗工領域が枠体５０の内壁を構成する第１樹脂部５３に埋没して保持される領域となっている。正極３６を構成する正極活物質としては、例えば水酸化ニッケルが挙げられる。負極３８を構成する負極活物質としては、例えば水素吸蔵合金が挙げられる。電極板３４の他方の面における負極３８の形成領域は、電極板３４の一方の面における正極３６の形成領域に対して一回り大きくなっている。なお、電極板３４は、導電性樹脂から形成されてもよい。 The electrode plate 34 is a rectangular metal foil made of nickel, for example. The edge portion 34 a of the electrode plate 34 is an uncoated region where the positive electrode active material and the negative electrode active material are not coated, and the uncoated region is buried in the first resin portion 53 constituting the inner wall of the frame body 50. It is an area to be held. An example of the positive electrode active material constituting the positive electrode 36 is nickel hydroxide. Examples of the negative electrode active material constituting the negative electrode 38 include a hydrogen storage alloy. The formation region of the negative electrode 38 on the other surface of the electrode plate 34 is slightly larger than the formation region of the positive electrode 36 on one surface of the electrode plate 34. The electrode plate 34 may be formed from a conductive resin.
　セパレータ４０は、例えばシート状に形成されている。セパレータ４０を形成する材料としては、ポリエチレン（ＰＥ）及びポリプロピレン（ＰＰ）等のポリオレフィン系樹脂からなる多孔質フィルム、並びにポリプロピレン、ポリエチレンテレフタレート（ＰＥＴ）、及びメチルセルロース等からなる織布又は不織布等が例示される。また、セパレータ４０は、フッ化ビニリデン樹脂化合物で補強されてもよい。なお、セパレータ４０は、シート状に限られず、袋状でもよい。 The separator 40 is formed in a sheet shape, for example. Examples of the material forming the separator 40 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), and a woven or non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, or the like. Is done. Moreover, the separator 40 may be reinforced with a vinylidene fluoride resin compound. The separator 40 is not limited to a sheet shape, and may be a bag shape.
　枠体５０（第１樹脂部５３及び第２樹脂部５４）は、例えば絶縁性の樹脂を用いた射出成形によって矩形の筒状に形成されている。枠体５０を構成する樹脂材料としては、例えばポリプロピレン（ＰＰ）、ポリフェニレンサルファイド（ＰＰＳ）、又は変性ポリフェニレンエーテル（変性ＰＰＥ）等が挙げられる。第１樹脂部５３の形成は、例えば、バイポーラ電極３２がセパレータ４０を介して積層されることにより積層体３０が形成される前に行われてもよいし、積層体３０が形成された後に行われてもよい。第２樹脂部５４の形成は、例えば、第１樹脂部５３及び積層体３０の形成後に行われる。 The frame 50 (the first resin portion 53 and the second resin portion 54) is formed in a rectangular cylindrical shape by, for example, injection molding using an insulating resin. Examples of the resin material constituting the frame 50 include polypropylene (PP), polyphenylene sulfide (PPS), and modified polyphenylene ether (modified PPE). The formation of the first resin portion 53 may be performed, for example, before the stacked body 30 is formed by stacking the bipolar electrode 32 via the separator 40 or after the stacked body 30 is formed. It may be broken. Formation of the 2nd resin part 54 is performed after formation of the 1st resin part 53 and the laminated body 30, for example.
　図４は、図１に示される蓄電モジュールを示す斜視図である。同図に示されるように、蓄電モジュール１２は、例えば矩形板状を呈し、蓄電モジュール１２の厚さ方向が第１方向Ｄ１となるように配置されている。蓄電モジュール１２は、第１方向Ｄ１で互いに対向する一対の主面１２ａと、第２方向Ｄ２で互いに対向する一対の第１側面１２ｂと、第３方向Ｄ３で互いに対向する一対の第２側面１２ｃと、を有している。第１側面１２ｂ及び第２側面１２ｃは、枠体５０の第２樹脂部５４により構成されている。 FIG. 4 is a perspective view showing the power storage module shown in FIG. As shown in the figure, the power storage module 12 has a rectangular plate shape, for example, and is disposed such that the thickness direction of the power storage module 12 is the first direction D1. The power storage module 12 includes a pair of main surfaces 12a facing each other in the first direction D1, a pair of first side surfaces 12b facing each other in the second direction D2, and a pair of second side surfaces 12c facing each other in the third direction D3. And have. The first side surface 12 b and the second side surface 12 c are configured by the second resin portion 54 of the frame body 50.
　蓄電モジュール１２の枠体５０は、側面３０ａを覆う本体領域５１と、本体領域５１から突出する突出領域５２とを有している。本体領域５１は、第１樹脂部５３及び第２樹脂部５４により構成されている。本体領域５１は、第２方向Ｄ２で互いに対向する一対の第１側部５１ａと、第３方向Ｄ３で互いに対向する一対の第２側部５１ｂと、を有している。 The frame 50 of the electricity storage module 12 has a main body region 51 that covers the side surface 30 a and a protruding region 52 that protrudes from the main body region 51. The main body region 51 includes a first resin portion 53 and a second resin portion 54. The main body region 51 has a pair of first side parts 51a that face each other in the second direction D2, and a pair of second side parts 51b that face each other in the third direction D3.
　本体領域５１における一方の第１側部５１ａには、枠体５０内に電解液を注入するための注液口５０ａが設けられている。注液口５０ａは、具体的には、一方の第１側部５１ａの外側面に設けられている。一方の第１側部５１ａの外側面は、第１側面１２ｂの一部を構成するので、注液口５０ａは第１側面１２ｂに設けられていると言える。注液口５０ａは、注液口５０ａが設けられた第１側面１２ｂと同じ方向を向いている。つまり、注液口５０ａの向く方向とは、第１側面１２ｂの向く方向であって、第２方向Ｄ２に沿って第１側面１２ｂから蓄電モジュール１２の外方に向かう方向である。注液口５０ａの形状は例えば矩形であるが、円形等の他の形状であってもよい。注液口５０ａは、例えば第３方向Ｄ３が長手方向となるように延在している。注液口５０ａは、例えば第１側面１２ｂの第３方向Ｄ３における中央に配置されている。注液口５０ａは、第１側面１２ｂの第３方向Ｄ３における端部に配置されていてもよい。 In one of the first side portions 51 a in the main body region 51, a liquid injection port 50 a for injecting an electrolytic solution into the frame body 50 is provided. Specifically, the liquid injection port 50a is provided on the outer surface of one of the first side portions 51a. Since the outer side surface of one first side portion 51a forms part of the first side surface 12b, it can be said that the liquid injection port 50a is provided on the first side surface 12b. The liquid injection port 50a faces the same direction as the first side surface 12b provided with the liquid injection port 50a. That is, the direction in which the liquid injection port 50a faces is the direction in which the first side surface 12b faces, and the direction from the first side surface 12b to the outside of the power storage module 12 along the second direction D2. The shape of the liquid injection port 50a is, for example, a rectangle, but may be another shape such as a circle. The liquid injection port 50a extends, for example, such that the third direction D3 is the longitudinal direction. The liquid injection port 50a is arranged, for example, at the center in the third direction D3 of the first side surface 12b. The liquid injection port 50a may be disposed at the end of the first side surface 12b in the third direction D3.
　突出領域５２は、第２樹脂部５４により構成されている。突出領域５２は、第１方向Ｄ１において注液口５０ａから離れるように一方の第１側部５１ａから突出している。突出領域５２は、第２方向Ｄ２から見て、例えば矩形状を呈している。突出領域５２は、一方の第１側部５１ａの外側面から連続し、第１側面１２ｂの一部を構成する外側面を有している。本実施形態では、一対の突出領域５２が第１方向Ｄ１において注液口５０ａを挟むように配置されている。突出領域５２は、第３方向Ｄ３に沿って注液口５０ａの全長を越えて注液口５０ａの両外側にはみ出る長さで設けられている。 The protruding region 52 is configured by the second resin portion 54. The protruding region 52 protrudes from one first side portion 51a so as to be separated from the liquid injection port 50a in the first direction D1. The protruding region 52 has, for example, a rectangular shape when viewed from the second direction D2. The protruding region 52 has an outer surface that is continuous from the outer surface of one of the first side portions 51a and forms a part of the first side surface 12b. In the present embodiment, the pair of protruding regions 52 are arranged so as to sandwich the liquid injection port 50a in the first direction D1. The protruding region 52 is provided with a length that extends beyond the entire length of the liquid injection port 50a along the third direction D3 and protrudes from both outer sides of the liquid injection port 50a.
　注液口５０ａは、電解液の注入後にシール材（不図示）によって封止される。電解液は、例えば電解液を供給する供給管（不図示）を注液口５０ａの周囲領域に押し付けながら注入される。この周囲領域は、一方の第１側部５１ａの外側面における注液口５０ａに隣接する部分と突出領域５２の外側面とを含む。 The liquid inlet 50a is sealed with a sealing material (not shown) after the electrolyte is injected. The electrolytic solution is injected, for example, while pressing a supply pipe (not shown) for supplying the electrolytic solution against a region around the injection port 50a. This peripheral region includes a portion adjacent to the liquid injection port 50 a on the outer side surface of one first side portion 51 a and the outer side surface of the protruding region 52.
　図５は、図４の蓄電モジュールの一部を第２方向から見て拡大した側面図である。同図に示されるように、第２樹脂部５４のうち一方の第１側部５１ａを構成する部分には、注液口５０ａを一端とする単一の流路５４ａが設けられている。流路５４ａは第２方向Ｄ２（図４参照）に延在している。第１樹脂部５３のうち一方の第１側部５１ａを構成する部分には、第１方向Ｄ１において隣り合うバイポーラ電極３２間の内部空間Ｖ（図３参照）及び流路５４ａと連通する複数の流路５３ａが設けられている。複数の流路５３ａのそれぞれは、第２方向Ｄ２に延在し、複数の流路５３ａは、第１方向Ｄ１に配列されている。流路５３ａは、例えば第１方向Ｄ１に隣り合うバイポーラ電極３２の第１樹脂部５３において、電極板３４の一方の面側に溝を形成することによって第１樹脂部５３，５３間に形成された空隙であってもよい。この溝は、第１樹脂部５３の成型の際、内部空間Ｖ及び流路５４ａと連通するように同時に成型されてもよいし、第１樹脂部５３の成型後の加工によって形成されてもよい。各流路５３ａは、例えば断面矩形状を呈している。流路５４ａの断面形状は、例えば、注液口５０ａと同形状を呈し、複数の流路５３ａを覆うように広がっている。 FIG. 5 is an enlarged side view of a part of the power storage module of FIG. 4 as viewed from the second direction. As shown in the figure, a portion of the second resin portion 54 constituting one first side portion 51a is provided with a single flow path 54a having a liquid injection port 50a as one end. The channel 54a extends in the second direction D2 (see FIG. 4). A portion of the first resin portion 53 that constitutes one first side portion 51a includes a plurality of internal spaces V (see FIG. 3) between the bipolar electrodes 32 adjacent in the first direction D1 and the flow paths 54a. A flow path 53a is provided. Each of the plurality of flow paths 53a extends in the second direction D2, and the plurality of flow paths 53a are arranged in the first direction D1. For example, in the first resin part 53 of the bipolar electrode 32 adjacent in the first direction D1, the flow path 53a is formed between the first resin parts 53 and 53 by forming a groove on one surface side of the electrode plate 34. It may be a void. This groove may be formed at the same time so as to communicate with the internal space V and the flow path 54a when the first resin portion 53 is molded, or may be formed by processing after the first resin portion 53 is molded. . Each flow path 53a has, for example, a rectangular cross section. The cross-sectional shape of the flow path 54a is, for example, the same shape as the liquid injection port 50a, and spreads so as to cover the plurality of flow paths 53a.
　図６は、第２樹脂部の形成方法を説明するための断面図である。同図に示されるように、モールドＭ内に、流動性を有する第２樹脂部５４の樹脂材料５４Ｐを流し込むことによって、第２樹脂部５４が形成される。モールドＭは、枠体５０の本体領域５１及び突出領域５２（図５参照）の外縁を形成する第１部分Ｍ１と、流路５４ａを形成するための入れ子である第２部分Ｍ２とを有する。 FIG. 6 is a cross-sectional view for explaining a method of forming the second resin portion. As shown in the figure, the second resin portion 54 is formed by pouring the resin material 54P of the second resin portion 54 having fluidity into the mold M. The mold M includes a first portion M1 that forms the outer edges of the main body region 51 and the protruding region 52 (see FIG. 5) of the frame body 50, and a second portion M2 that is a nesting for forming the flow path 54a.
　樹脂材料５４Ｐは、例えば、第３方向Ｄ３に沿って流れる。樹脂材料５４Ｐは、互いに対向配置された一対の第１部分Ｍ１間を流れた後、第２部分Ｍ２に衝突して、第２部分Ｍ２の周囲に沿って２つに分かれる。２つに分かれた樹脂材料５４Ｐは、それぞれ第１部分Ｍ１と第２部分Ｍ２との間を流れた後、合流して、一対の第１部分Ｍ１間を流れる。このように、樹脂材料５４Ｐの流路は、第２部分Ｍ２が配置されることにより狭くなり易い。そこで、樹脂材料５４Ｐの流路確保のため、第１部分Ｍ１には、第２部分Ｍ２に対応する部分に凹部Ｍ１ａが形成されている。凹部Ｍ１ａは、第１方向Ｄ１において第２部分Ｍ２から離れるように、第１部分Ｍ１の他の部分に対して窪んでいる。突出領域５２は、凹部Ｍ１ａにより形成される。 Resin material 54P flows along the third direction D3, for example. The resin material 54P flows between the pair of first portions M1 arranged to face each other, then collides with the second portion M2, and is divided into two along the periphery of the second portion M2. The resin material 54P divided into two flows between the first portion M1 and the second portion M2, respectively, and then merges to flow between the pair of first portions M1. Thus, the flow path of the resin material 54P is likely to be narrowed by the second portion M2 being disposed. Therefore, in order to secure the flow path of the resin material 54P, the first portion M1 is formed with a recess M1a in a portion corresponding to the second portion M2. The recessed portion M1a is recessed with respect to the other portions of the first portion M1 so as to be separated from the second portion M2 in the first direction D1. The protruding region 52 is formed by the recess M1a.
　図７は、図１に示される冷却部材を示す斜視図である。同図に示されるように、冷却部材１４は、例えば矩形板状を呈し、冷却部材１４の厚さ方向が第１方向Ｄ１となるように配置されている。冷却部材１４は、第１方向Ｄ１で互いに対向する一対の主面１４ａと、第２方向Ｄ２で互いに対向する一対の第１側面１４ｂと、第３方向Ｄ３で互いに対向する一対の第２側面１４ｃと、を有している。冷却部材１４は、冷却部材１４の内部に冷媒を流通させることで、蓄電モジュール１２（図１参照）からの熱を効率的に外部に放出し、蓄電モジュール１２を冷却する。冷媒は、例えば絶縁性を有し、空気、及びアンモニア等の気体又はＬＬＣ等の液体である。 FIG. 7 is a perspective view showing the cooling member shown in FIG. As shown in the figure, the cooling member 14 has a rectangular plate shape, for example, and is arranged so that the thickness direction of the cooling member 14 is the first direction D1. The cooling member 14 includes a pair of main surfaces 14a facing each other in the first direction D1, a pair of first side surfaces 14b facing each other in the second direction D2, and a pair of second side surfaces 14c facing each other in the third direction D3. And have. The cooling member 14 causes the refrigerant to flow inside the cooling member 14, thereby efficiently releasing heat from the power storage module 12 (see FIG. 1) to the outside, thereby cooling the power storage module 12. The refrigerant is, for example, insulative and is air, a gas such as ammonia, or a liquid such as LLC.
　冷却部材１４には、冷媒を流通させる複数の流路１５ａが設けられている。複数の流路１５ａは、第２方向Ｄ２に配列されている。各流路１５ａは、第３方向Ｄ３に直線状に延在する。流路１５ａは、例えば、断面矩形状を呈している。流路１５ａは、断面円形状等を呈していてもよい。 The cooling member 14 is provided with a plurality of flow paths 15a for circulating the refrigerant. The plurality of flow paths 15a are arranged in the second direction D2. Each flow path 15a extends linearly in the third direction D3. The channel 15a has, for example, a rectangular cross section. The channel 15a may have a circular cross section or the like.
　冷却部材１４は、複数の流路１５ａを第１方向Ｄ１に挟む一対の板部材１５ｂと、一対の板部材１５ｂ同士を接続する複数の接続部材１５ｃと、を有している。板部材１５ｂは、例えば、第１方向Ｄ１から見て、矩形状を呈し、その外面として主面１４ａを有する。接続部材１５ｃは、例えば、第１方向Ｄ１及び第３方向Ｄ３に延在する矩形板である。接続部材１５ｃは、流路１５ａと交互に第２方向Ｄ２に配列されている。第２方向Ｄ２の両端に配置された接続部材１５ｃは、冷却部材１４の側壁として機能し、その外面として第１側面１４ｂを有する。それ以外の接続部材１５ｃは、隣り合う２つの流路を隔てる隔壁として機能する。 The cooling member 14 includes a pair of plate members 15b that sandwich the plurality of flow paths 15a in the first direction D1, and a plurality of connection members 15c that connect the pair of plate members 15b to each other. The plate member 15b has, for example, a rectangular shape when viewed from the first direction D1, and has a main surface 14a as an outer surface thereof. The connection member 15c is, for example, a rectangular plate that extends in the first direction D1 and the third direction D3. The connection members 15c are arranged in the second direction D2 alternately with the flow paths 15a. The connection members 15c arranged at both ends in the second direction D2 function as side walls of the cooling member 14, and have first side surfaces 14b as outer surfaces thereof. The other connection member 15c functions as a partition that separates two adjacent flow paths.
　第２側面１４ｃには、冷却部材１４の内部に冷媒を流入させるため、又は冷却部材１４の内部から冷媒を流出させるための開口１５ｄが設けられている。開口１５ｄは、流路１５ａの両端により構成されている。冷媒は、例えば、流路１５ａの一端により構成される開口１５ｄを通って冷却部材１４の内部に流入した後、流路１５ａの他端により構成される開口１５ｄを通って冷却部材１４の内部から流出する。つまり、冷却部材１４には、冷却部材１４を第３方向Ｄ３において貫通する貫通孔が流路１５ａとして設けられている。 The second side surface 14 c is provided with an opening 15 d for allowing the refrigerant to flow into the cooling member 14 or for allowing the refrigerant to flow out of the cooling member 14. The opening 15d is configured by both ends of the flow path 15a. For example, the refrigerant flows into the inside of the cooling member 14 through the opening 15d constituted by one end of the flow path 15a, and then flows from the inside of the cooling member 14 through the opening 15d constituted by the other end of the flow path 15a. leak. That is, the cooling member 14 is provided with a through hole that penetrates the cooling member 14 in the third direction D3 as the flow path 15a.
　開口１５ｄは、その開口１５ｄが設けられた第２側面１４ｃと同じ方向を向いている。つまり、開口１５ｄの向く方向とは、第２側面１４ｃの向く方向であって、第３方向Ｄ３に沿って第２側面１４ｃから冷却部材１４の外方に向かう方向である。したがって、一方の第２側面１４ｃに設けられた開口１５ｄの向く方向と、他方の第２側面１４ｃに設けられた開口１５ｄの向く方向とは、互いに異なり、逆方向である。注液口５０ａ（図４参照）の向く方向は、一対の第２側面１４ｃのいずれに設けられた開口１５ｄの向く方向とも互いに異なっている。注液口５０ａの向く方向、及び開口１５ｄの向く方向は、例えば、直交している。 The opening 15d faces the same direction as the second side surface 14c provided with the opening 15d. That is, the direction in which the opening 15d faces is the direction in which the second side face 14c faces, and is the direction from the second side face 14c toward the outside of the cooling member 14 along the third direction D3. Therefore, the direction in which the opening 15d provided in one second side surface 14c faces and the direction in which the opening 15d provided in the other second side surface 14c faces are different from each other and in opposite directions. The direction in which the liquid injection port 50a (see FIG. 4) faces is different from the direction in which the opening 15d provided in any one of the pair of second side surfaces 14c faces. The direction in which the liquid injection port 50a faces and the direction in which the opening 15d faces are, for example, orthogonal to each other.
　冷却部材１４は、第１方向Ｄ１から見て、図４に示される蓄電モジュール１２よりも小さく、蓄電モジュール１２の枠体５０の内側において、主面１４ａを全体的に電極板３４に当接させるように配置されている。上述のように、主面１４ａは、板部材１５ｂの外面により構成されている。したがって、冷却部材１４は、例えば、板部材１５ｂを全体的に電極板３４に当接させるように配置されているとも言える。 The cooling member 14 is smaller than the power storage module 12 shown in FIG. 4 when viewed from the first direction D1, and the main surface 14a is entirely brought into contact with the electrode plate 34 inside the frame 50 of the power storage module 12. Are arranged as follows. As described above, the main surface 14a is configured by the outer surface of the plate member 15b. Therefore, it can be said that the cooling member 14 is disposed so that the plate member 15b is brought into contact with the electrode plate 34 as a whole, for example.
　図８は、比較例に係る蓄電装置を示す斜視図である。図９は、図８の蓄電装置の一部を拡大した側面図である。図９では、ボルト１８の図示が省略されている。図８及び図９に示されるように、比較例に係る蓄電装置１００は、冷却部材１４の点で、第１実施形態に係る蓄電装置１０と主に相違している。蓄電装置１００の冷却部材１４では、複数の流路１５ａは第３方向Ｄ３に配列されると共に、各流路１５ａは第２方向Ｄ２に直線状に延在する。また、開口１５ｄが第１側面１４ｂに設けられている。このため、蓄電装置１００では、注液口５０ａの向く方向及び開口１５ｄの向く方向が同じである。したがって、開口１５ｄの一部が突出領域５２に覆われる。これにより、冷媒の流通が突出領域５２によって妨げられるので、開口１５ｄを通じて冷媒を効率よく流通させることができない。この結果、蓄電装置１００では、冷却部材１４による冷却効率が低下する。 FIG. 8 is a perspective view showing a power storage device according to a comparative example. FIG. 9 is an enlarged side view of a part of the power storage device of FIG. In FIG. 9, the illustration of the bolt 18 is omitted. As illustrated in FIGS. 8 and 9, the power storage device 100 according to the comparative example is mainly different from the power storage device 10 according to the first embodiment in terms of a cooling member 14. In the cooling member 14 of the power storage device 100, the plurality of flow paths 15a are arranged in the third direction D3, and each flow path 15a extends linearly in the second direction D2. An opening 15d is provided in the first side surface 14b. For this reason, in the power storage device 100, the direction in which the liquid injection port 50a faces and the direction in which the opening 15d faces are the same. Therefore, a part of the opening 15d is covered with the protruding region 52. Thereby, since the distribution | circulation of a refrigerant | coolant is prevented by the protrusion area | region 52, a refrigerant | coolant cannot be distribute | circulated efficiently through the opening 15d. As a result, in the power storage device 100, the cooling efficiency by the cooling member 14 decreases.
　これに対して、図１に示されるように、蓄電装置１０では、注液口５０ａの向く方向、及び開口１５ｄの向く方向が互いに異なり、互いに直交している。したがって、開口１５ｄが突出領域５２によって覆われず、開口１５ｄを突出領域５２から開放された状態とすることができる。このため、冷媒の流通が突出領域５２によって妨げられることがないので、開口１５ｄを通じて冷媒を効率よく流通させることができる。この結果、蓄電装置１０では、冷却部材１４による冷却効率の低下を抑制可能となるので、蓄電モジュール１２の放熱性を向上させることができる。 On the other hand, as shown in FIG. 1, in the power storage device 10, the direction toward the liquid injection port 50 a and the direction toward the opening 15 d are different from each other and are orthogonal to each other. Therefore, the opening 15d is not covered by the protruding region 52, and the opening 15d can be opened from the protruding region 52. For this reason, since the circulation of the refrigerant is not hindered by the protruding region 52, the refrigerant can be efficiently circulated through the opening 15d. As a result, in the power storage device 10, it is possible to suppress a decrease in cooling efficiency due to the cooling member 14, so that the heat dissipation of the power storage module 12 can be improved.
　冷却部材１４には、冷媒を流通させる複数の流路１５ａが設けられている。流路１５ａは、板状の冷却部材１４を第３方向Ｄ３において貫通する貫通孔である。複数の流路１５ａは、第２方向Ｄ２に配列されると共に、それぞれ第３方向Ｄ３に延在する。このような流路１５ａによれば、冷却部材１４の内部に冷媒を効率よく流通させることができるので、蓄電モジュール１２の放熱性を更に向上させることができる。 The cooling member 14 is provided with a plurality of flow paths 15a for circulating the refrigerant. The flow path 15a is a through hole that penetrates the plate-like cooling member 14 in the third direction D3. The plurality of flow paths 15a are arranged in the second direction D2 and each extend in the third direction D3. According to such a flow path 15a, since the refrigerant can be efficiently circulated inside the cooling member 14, the heat dissipation of the power storage module 12 can be further improved.
　冷却部材１４は、複数の流路１５ａを第１方向Ｄ１に挟む一対の板部材１５ｂを有している。このため、板部材１５ｂの外表面、つまり、冷却部材１４の主面１４ａを全体的に蓄電モジュール１２の主面１２ａに当接させることができるので、蓄電モジュール１２に対して局所的な圧力が加わるのを抑制可能となる。 The cooling member 14 has a pair of plate members 15b that sandwich the plurality of flow paths 15a in the first direction D1. For this reason, since the outer surface of the plate member 15b, that is, the main surface 14a of the cooling member 14 can be brought into contact with the main surface 12a of the power storage module 12 as a whole, local pressure is applied to the power storage module 12. It is possible to suppress the addition.
　冷却部材１４は、導電性を有している。このため、第１方向Ｄ１に隣り合う蓄電モジュール１２同士を冷却部材１４によって電気的に接続することができる。したがって、蓄電モジュール１２同士を電気的に接続する部材を更に設ける必要がないので、蓄電装置１０の小型化を図ることができる。 The cooling member 14 has conductivity. For this reason, the power storage modules 12 adjacent in the first direction D1 can be electrically connected by the cooling member 14. Therefore, since it is not necessary to further provide a member for electrically connecting the power storage modules 12 to each other, the power storage device 10 can be reduced in size.
　冷媒は絶縁性を有している。例えば水等の導電性を有する冷媒を用いた場合、冷媒を通じて、冷却部材１４同士の短絡が生じるおそれがある。蓄電装置１０では、例えば空気等の絶縁性を有する冷媒が用いられるので、冷媒を通じて、冷却部材１４同士の短絡が生じることを防止できる。 Refrigerant has insulating properties. For example, when a conductive coolant such as water is used, the cooling members 14 may be short-circuited through the coolant. In the power storage device 10, for example, an insulating refrigerant such as air is used. Therefore, it is possible to prevent a short circuit between the cooling members 14 through the refrigerant.
（第２実施形態）
　図１０に示される蓄電装置１１０は、例えばフォークリフト、ハイブリッド自動車、及び電気自動車等の各種車両のバッテリとして用いられる。蓄電モジュール１１２は、例えば、バイポーラ電池である。蓄電モジュール１１２の例には、ニッケル水素二次電池、及びリチウムイオン二次電池等の二次電池が含まれるが、電気二重層キャパシタであってもよい。以下の説明では、ニッケル水素二次電池を例示する。なお、図１０～図１６には、ＸＹＺ直交座標系が示される。 (Second Embodiment)
The power storage device 110 shown in FIG. 10 is used as a battery for various vehicles such as forklifts, hybrid cars, and electric cars. The power storage module 112 is, for example, a bipolar battery. Examples of the power storage module 112 include secondary batteries such as a nickel hydride secondary battery and a lithium ion secondary battery, but may be an electric double layer capacitor. In the following description, a nickel metal hydride secondary battery is illustrated. 10 to 16 show the XYZ orthogonal coordinate system.
　複数の蓄電モジュール１１２は、金属板等の導電体１１４を介して積層されて配列体１１１を形成している。導電体１１４は、積層方向（Ｚ軸方向；一方向）において互いに隣り合う蓄電モジュール１１２，１１２の間に配置される一つの金属体であり、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の両方に接触させた状態で配置される。導電体１１４は、例えば、アルミニウム、及び銅等の金属材料により形成されている。積層方向から見たとき、蓄電モジュール１１２及び導電体１１４は、例えば、矩形形状を有する。積層方向から見たとき、導電体１１４は、蓄電モジュール１１２よりも小さいが、蓄電モジュール１１２と同じかそれより大きくてもよい。導電体１１４は、積層方向において隣り合う蓄電モジュール１１２と電気的に接続される。これにより、複数の蓄電モジュール１１２が積層方向に直列に接続される。 The plurality of power storage modules 112 are stacked via a conductor 114 such as a metal plate to form an array 111. The conductor 114 is one metal body disposed between the power storage modules 112 and 112 adjacent to each other in the stacking direction (Z-axis direction; one direction), and both the power storage modules 112 and 112 adjacent to each other in the stacking direction. It arrange | positions in the state contacted. The conductor 114 is made of a metal material such as aluminum and copper, for example. When viewed from the stacking direction, the power storage module 112 and the conductor 114 have, for example, a rectangular shape. When viewed from the stacking direction, the conductor 114 is smaller than the power storage module 112, but may be the same as or larger than the power storage module 112. The conductor 114 is electrically connected to the power storage module 112 adjacent in the stacking direction. Thereby, the some electrical storage module 112 is connected in series in the lamination direction.
　導電体１１４は、蓄電モジュール１１２の積層方向において両端に位置する蓄電モジュール１１２の外側にもそれぞれ配置される。すなわち、導電体１１４は、積層方向において、配列体１１１の両端にも配置されている。積層方向において、配列体１１１の一端に位置する導電体１１４には正極端子１２４が接続されており、配列体１１１の他端に位置する導電体１１４には負極端子１２６が接続されている。正極端子１２４は、正極端子１２４が接続される導電体１１４と一体であってもよい。負極端子１２６は、負極端子１２６が接続される導電体１１４と一体であってもよい。正極端子１２４及び負極端子１２６は、積層方向に交差する方向（Ｘ軸方向）に延在している。これらの正極端子１２４及び負極端子１２６により、蓄電装置１１０の充放電を実施できる。 The conductors 114 are also arranged outside the power storage modules 112 positioned at both ends in the stacking direction of the power storage modules 112, respectively. That is, the conductor 114 is also disposed at both ends of the array body 111 in the stacking direction. In the stacking direction, a positive electrode terminal 124 is connected to the conductor 114 located at one end of the array 111, and a negative electrode 126 is connected to the conductor 114 located at the other end of the array 111. The positive terminal 124 may be integrated with the conductor 114 to which the positive terminal 124 is connected. The negative electrode terminal 126 may be integrated with the conductor 114 to which the negative electrode terminal 126 is connected. The positive electrode terminal 124 and the negative electrode terminal 126 extend in a direction intersecting the stacking direction (X-axis direction). The positive and negative terminals 124 and 126 can charge and discharge the power storage device 110.
　導電体１１４は、蓄電モジュール１１２において発生した熱を放出するための放熱板としても機能する。導電体１１４は、蓄電モジュール１１２における導電体１１４との接触部（例えば接触面１１２ａ）よりも高い熱伝導性を有してもよい。また、導電体１１４の内部には、積層方向に交差する方向（Ｙ軸方向）に延在する貫通孔１１４ａが設けられている。貫通孔１１４ａは、導電体１１４において互いに対向する一方の側面１１４ｄ（図１４参照）から他方の側面１１４ｆ（図１４参照）まで直線状に連通する。 The conductor 114 also functions as a heat radiating plate for releasing the heat generated in the power storage module 112. The conductor 114 may have higher thermal conductivity than a contact portion (for example, the contact surface 112a) with the conductor 114 in the power storage module 112. In addition, a through-hole 114a extending in the direction intersecting the stacking direction (Y-axis direction) is provided inside the conductor 114. The through-hole 114a communicates linearly from one side surface 114d (see FIG. 14) facing each other in the conductor 114 to the other side surface 114f (see FIG. 14).
　本実施形態では、導電体１１４には、複数の貫通孔１１４ａが設けられている。複数の貫通孔１１４ａは、積層方向及び積層方向に交差する方向（Ｘ軸方向）に配列されている。このような貫通孔１１４ａに空気等の気体の冷媒が通過することにより、蓄電モジュール１１２において発生する熱を効率的に外部に放出できる。導電体１１４のサイズ、導電体１１４の材質、貫通孔１１４ａのサイズ、及び貫通孔１１４ａの数等は、例えば、蓄電装置１１０の温度が５０℃を超えないように適宜調整される。貫通孔１１４ａに空気を積極的に流通（循環）させる装置が、蓄電モジュール１１２に設けられてもよい。また、本実施形態では、導電体１１４に形成される貫通孔１１４ａの延在方向が、積層方向に配列される全ての導電体１１４において一致している。 In the present embodiment, the conductor 114 is provided with a plurality of through holes 114a. The plurality of through holes 114a are arranged in the stacking direction and the direction (X-axis direction) intersecting the stacking direction. When a gaseous refrigerant such as air passes through such a through-hole 114a, heat generated in the power storage module 112 can be efficiently released to the outside. The size of the conductor 114, the material of the conductor 114, the size of the through hole 114a, the number of the through holes 114a, and the like are appropriately adjusted so that the temperature of the power storage device 110 does not exceed 50 ° C., for example. A device that actively circulates (circulates) air through the through hole 114 a may be provided in the power storage module 112. Moreover, in this embodiment, the extending direction of the through-hole 114a formed in the conductor 114 is the same in all the conductors 114 arranged in the stacking direction.
　蓄電装置１１０は、交互に積層された蓄電モジュール１１２及び導電体１１４を積層方向に拘束する拘束部材１１５を備え得る。拘束部材１１５は、一対の拘束プレート１１６，１１７と、拘束プレート１１６，１１７同士を連結する連結部材（ボルト１１８及びナット１２０）と、を備える。各拘束プレート１１６，１１７と導電体１１４との間には、例えば、樹脂フィルム等の絶縁フィルム１２２が配置される。各拘束プレート１１６，１１７は、例えば、鉄等の金属によって構成されている。 The power storage device 110 can include a constraining member 115 that constrains alternately stacked power storage modules 112 and conductors 114 in the stacking direction. The restraining member 115 includes a pair of restraining plates 116 and 117 and a connecting member (bolt 118 and nut 120) for joining the restraining plates 116 and 117 to each other. For example, an insulating film 122 such as a resin film is disposed between the restraining plates 116 and 117 and the conductor 114. Each constraining plate 116, 117 is made of metal such as iron, for example.
　積層方向から見たとき、各拘束プレート１１６，１１７及び絶縁フィルム１２２は、例えば、矩形形状を有する。絶縁フィルム１２２は、導電体１１４よりも大きく、各拘束プレート１１６，１１７は、蓄電モジュール１１２よりも大きい。積層方向から見たとき、拘束プレート１１６の縁部には、ボルト１１８の軸部を挿通させる挿通孔１１６ａが蓄電モジュール１１２よりも外側となる位置に設けられている。同様に、積層方向から見たとき、拘束プレート１１７の縁部には、ボルト１１８の軸部を挿通させる挿通孔１１７ａが蓄電モジュール１１２よりも外側となる位置に設けられている。積層方向から見たときに各拘束プレート１１６，１１７が矩形形状を有している場合、挿通孔１１６ａ及び挿通孔１１７ａは、拘束プレート１１６，１１７の角部に位置する。 When viewed from the stacking direction, each of the restraining plates 116 and 117 and the insulating film 122 has, for example, a rectangular shape. The insulating film 122 is larger than the conductor 114, and the restraining plates 116 and 117 are larger than the power storage module 112. When viewed from the stacking direction, an insertion hole 116 a through which the shaft portion of the bolt 118 is inserted is provided at an edge of the restraining plate 116 at a position outside the power storage module 112. Similarly, when viewed from the stacking direction, an insertion hole 117 a through which the shaft portion of the bolt 118 is inserted is provided at the edge of the restraining plate 117 at a position outside the power storage module 112. When each restraint plate 116, 117 has a rectangular shape when viewed from the stacking direction, the insertion hole 116a and the insertion hole 117a are located at the corners of the restraint plates 116, 117.
　一方の拘束プレート１１６は、負極端子１２６に接続された導電体１１４に絶縁フィルム１２２を介して突き当てられ、他方の拘束プレート１１７は、正極端子１２４に接続された導電体１１４に絶縁フィルム１２２を介して突き当てられている。ボルト１１８は、例えば、一方の拘束プレート１１６側から他方の拘束プレート１１７側に向かって挿通孔１１６ａ及び挿通孔１１７ａに順に通され、他方の拘束プレート１１７から突出するボルト１１８の先端には、ナット１２０が螺合されている。これにより、絶縁フィルム１２２、導電体１１４及び蓄電モジュール１１２が挟持されてユニット化されると共に、積層方向に拘束荷重が付加される。 One constraining plate 116 is abutted against the conductor 114 connected to the negative electrode terminal 126 via the insulating film 122, and the other constraining plate 117 applies the insulating film 122 to the conductor 114 connected to the positive electrode terminal 124. Has been hit through. For example, the bolt 118 is passed through the insertion hole 116a and the insertion hole 117a sequentially from one restraint plate 116 side to the other restraint plate 117 side. 120 is screwed together. Accordingly, the insulating film 122, the conductor 114, and the power storage module 112 are sandwiched and unitized, and a restraining load is applied in the stacking direction.
　図１１に示されるように、蓄電モジュール１１２は、複数のバイポーラ電極１３２が積層された積層体１３０を備える。バイポーラ電極１３２の積層方向から見たとき、積層体１３０は、例えば、矩形形状を有する。積層方向において隣り合うバイポーラ電極１３２間にはセパレータ１４０が配置され得る。バイポーラ電極１３２は、電極板１３４と、電極板１３４の一方の面（第１面）に設けられた正極層１３６（正極）と、電極板１３４の他方の面（第２面）に設けられた負極層１３８（負極）と、を含む。積層体１３０において、一のバイポーラ電極１３２の正極層１３６は、セパレータ１４０を挟んで積層方向に隣り合う一方のバイポーラ電極１３２の負極層１３８と対向し、一のバイポーラ電極１３２の負極層１３８は、セパレータ１４０を挟んで積層方向に隣り合う他方のバイポーラ電極１３２の正極層１３６と対向している。 As shown in FIG. 11, the power storage module 112 includes a stacked body 130 in which a plurality of bipolar electrodes 132 are stacked. When viewed from the stacking direction of the bipolar electrode 132, the stacked body 130 has, for example, a rectangular shape. A separator 140 may be disposed between the bipolar electrodes 132 adjacent in the stacking direction. The bipolar electrode 132 is provided on the electrode plate 134, the positive electrode layer 136 (positive electrode) provided on one surface (first surface) of the electrode plate 134, and the other surface (second surface) of the electrode plate 134. A negative electrode layer 138 (negative electrode). In the stacked body 130, the positive electrode layer 136 of one bipolar electrode 132 faces the negative electrode layer 138 of one bipolar electrode 132 adjacent in the stacking direction with the separator 140 interposed therebetween, and the negative electrode layer 138 of one bipolar electrode 132 is It faces the positive electrode layer 136 of the other bipolar electrode 132 adjacent in the stacking direction with the separator 140 interposed therebetween.
　積層方向において、積層体１３０の一端には、内側面に負極層１３８が配置された電極板１３４（負極側終端電極）が配置され、他端には、内側面に正極層１３６が配置された電極板１３４（正極側終端電極）が配置される。負極側終端電極の負極層１３８は、セパレータ１４０を介して最上層のバイポーラ電極１３２の正極層１３６と対向している。正極側終端電極の正極層１３６は、セパレータ１４０を介して最下層のバイポーラ電極１３２の負極層１３８と対向している。これら終端電極の電極板１３４はそれぞれ隣り合う導電体１１４（図１０参照）に接続される。 In the stacking direction, an electrode plate 134 (negative electrode termination electrode) having a negative electrode layer 138 disposed on the inner surface is disposed at one end of the laminate 130, and a positive electrode layer 136 is disposed on the inner surface at the other end. An electrode plate 134 (positive terminal electrode) is disposed. The negative electrode layer 138 of the negative electrode side termination electrode is opposed to the positive electrode layer 136 of the uppermost bipolar electrode 132 with the separator 140 interposed therebetween. The positive electrode layer 136 of the positive electrode side termination electrode faces the negative electrode layer 138 of the lowermost bipolar electrode 132 with the separator 140 interposed therebetween. The electrode plates 134 of these termination electrodes are respectively connected to adjacent conductors 114 (see FIG. 10).
　蓄電モジュール１１２は、バイポーラ電極１３２の積層方向に延在する積層体１３０の側面１３０ａにおいて電極板１３４の周縁部１３４ａを保持する枠体１５０（シール部）を備える。枠体１５０は、積層体１３０の側面１３０ａを取り囲むように構成されている。枠体１５０は、バイポーラ電極１３２の積層方向から見たとき、例えば、矩形形状を有している。この場合、枠体１５０は四つの矩形面から構成される。枠体１５０は、電極板１３４の周縁部１３４ａを保持する第一樹脂部１５２（第一シール部）と、積層方向から見たときに第一樹脂部１５２の周囲に設けられる第二樹脂部１５４（第二シール部）とを備え得る。 The power storage module 112 includes a frame 150 (seal portion) that holds the peripheral edge 134a of the electrode plate 134 on the side surface 130a of the stacked body 130 that extends in the stacking direction of the bipolar electrodes 132. The frame 150 is configured to surround the side surface 130 a of the stacked body 130. The frame 150 has, for example, a rectangular shape when viewed from the stacking direction of the bipolar electrodes 132. In this case, the frame 150 is composed of four rectangular surfaces. The frame 150 includes a first resin portion 152 (first seal portion) that holds the peripheral portion 134a of the electrode plate 134 and a second resin portion 154 that is provided around the first resin portion 152 when viewed from the stacking direction. (Second seal part).
　枠体１５０の内壁を構成する第一樹脂部１５２は、各バイポーラ電極１３２の電極板１３４の一方の面（正極層１３６が形成される面）から周縁部１３４ａにおける電極板１３４の端面にわたって設けられている。バイポーラ電極１３２の積層方向から見たとき、各第一樹脂部１５２は、各バイポーラ電極１３２の電極板１３４の周縁部１３４ａ全周にわたって設けられている。積層方向において隣り合う第一樹脂部１５２同士は、各バイポーラ電極１３２の電極板１３４の他方の面（負極層１３８が形成される面）の外側に延在する面において溶着している。その結果、第一樹脂部１５２には、各バイポーラ電極１３２の電極板１３４の周縁部１３４ａが埋没して保持されている。各バイポーラ電極１３２の電極板１３４の周縁部１３４ａと同様に、積層体１３０の両端に配置された電極板１３４の周縁部１３４ａも第一樹脂部１５２に埋没した状態で保持されている。これにより、積層方向に隣り合う電極板１３４，１３４間には、当該電極板１３４，１３４と第一樹脂部１５２とによって気密に仕切られた内部空間Ｖが形成されている。当該内部空間Ｖには、例えば水酸化カリウム水溶液等のアルカリ溶液からなる電解液（不図示）が収容されている。 The first resin portion 152 constituting the inner wall of the frame 150 is provided from one surface (surface on which the positive electrode layer 136 is formed) of the electrode plate 134 of each bipolar electrode 132 to the end surface of the electrode plate 134 in the peripheral portion 134a. ing. When viewed from the stacking direction of the bipolar electrodes 132, each first resin portion 152 is provided over the entire periphery 134 a of the electrode plate 134 of each bipolar electrode 132. The first resin portions 152 adjacent in the stacking direction are welded to each other on the surface extending outside the other surface (surface on which the negative electrode layer 138 is formed) of the electrode plate 134 of each bipolar electrode 132. As a result, the peripheral portion 134 a of the electrode plate 134 of each bipolar electrode 132 is buried and held in the first resin portion 152. Similarly to the peripheral portion 134 a of the electrode plate 134 of each bipolar electrode 132, the peripheral portion 134 a of the electrode plate 134 disposed at both ends of the laminated body 130 is also held in a state of being buried in the first resin portion 152. Thereby, between the electrode plates 134 and 134 adjacent to each other in the stacking direction, an internal space V that is airtightly partitioned by the electrode plates 134 and 134 and the first resin portion 152 is formed. In the internal space V, for example, an electrolytic solution (not shown) made of an alkaline solution such as an aqueous potassium hydroxide solution is accommodated.
　枠体１５０の外壁を構成する第二樹脂部１５４は、バイポーラ電極１３２の積層方向において積層体１３０の全長にわたって延在する筒状部である。第二樹脂部１５４は、バイポーラ電極１３２の積層方向に延在する第一樹脂部１５２の外側面を覆っている。第二樹脂部１５４は、バイポーラ電極１３２の積層方向に延在する内側面において第一樹脂部１５２の外側面に溶着されている。 The second resin portion 154 constituting the outer wall of the frame 150 is a cylindrical portion that extends over the entire length of the multilayer body 130 in the lamination direction of the bipolar electrode 132. The second resin portion 154 covers the outer surface of the first resin portion 152 extending in the stacking direction of the bipolar electrode 132. The second resin portion 154 is welded to the outer surface of the first resin portion 152 on the inner surface that extends in the stacking direction of the bipolar electrode 132.
　電極板１３４は、例えば、ニッケルからなる矩形の金属箔である。電極板１３４の周縁部１３４ａは、正極活物質及び負極活物質の塗工されない未塗工領域となっており、当該未塗工領域が枠体１５０の内壁を構成する第一樹脂部１５２に埋没して保持される領域となっている。正極層１３６を構成する正極活物質の例には、水酸化ニッケルが含まれる。負極層１３８を構成する負極活物質の例には、水素吸蔵合金が含まれる。電極板１３４の他方の面における負極層１３８の形成領域は、電極板１３４の一方の面における正極層１３６の形成領域に対して一回り大きくなっている。なお、電極板１３４は、導電性樹脂から形成されてもよい。 The electrode plate 134 is, for example, a rectangular metal foil made of nickel. The peripheral portion 134 a of the electrode plate 134 is an uncoated region where the positive electrode active material and the negative electrode active material are not coated, and the uncoated region is buried in the first resin portion 152 constituting the inner wall of the frame 150. It is an area to be held. Examples of the positive electrode active material constituting the positive electrode layer 136 include nickel hydroxide. Examples of the negative electrode active material constituting the negative electrode layer 138 include a hydrogen storage alloy. The formation region of the negative electrode layer 138 on the other surface of the electrode plate 134 is slightly larger than the formation region of the positive electrode layer 136 on one surface of the electrode plate 134. The electrode plate 134 may be made of a conductive resin.
　セパレータ１４０は、例えば、シート状に形成されている。セパレータ１４０を形成する材料の例には、ポリエチレン（ＰＥ）及びポリプロピレン（ＰＰ）等のポリオレフィン系樹脂からなる多孔質フィルム、並びにポリプロピレン及びメチルセルロース等からなる織布及び不織布等が含まれる。また、セパレータ１４０は、フッ化ビニリデン樹脂化合物で補強されていてもよい。なお、セパレータ１４０は、シート状に限られず、袋状でもよい。 The separator 140 is formed in a sheet shape, for example. Examples of the material forming the separator 140 include a porous film made of a polyolefin resin such as polyethylene (PE) and polypropylene (PP), and a woven fabric and a nonwoven fabric made of polypropylene and methylcellulose. The separator 140 may be reinforced with a vinylidene fluoride resin compound. The separator 140 is not limited to a sheet shape, and may be a bag shape.
　枠体１５０（第一樹脂部１５２及び第二樹脂部１５４）は、例えば絶縁性の樹脂を用いた射出成形によって矩形の筒状に形成されている。枠体１５０を構成する樹脂材料の例には、ポリプロピレン（ＰＰ）、ポリフェニレンサルファイド（ＰＰＳ）、及び変性ポリフェニレンエーテル（変性ＰＰＥ）等が含まれる。 The frame 150 (the first resin portion 152 and the second resin portion 154) is formed in a rectangular cylindrical shape by, for example, injection molding using an insulating resin. Examples of the resin material constituting the frame 150 include polypropylene (PP), polyphenylene sulfide (PPS), and modified polyphenylene ether (modified PPE).
　次に、上述した蓄電モジュール１１２間の距離について、図１２及び図１３を用いて説明する。図１２は、図１０の蓄電装置の一部をＡ方向から見た側面図であり、図１３は、図１２の蓄電装置を導電体に形成された貫通孔の端部が正面に見える方向から見た図である。図１２に示されるように、積層方向において互いに隣り合う蓄電モジュール１１２，１１２における第二樹脂部１５４同士の距離であって、延在方向における貫通孔１１４ａの端部１１４ｂ（端部１１４ｃ）に対向する第一部分Ｐ１の距離を第一距離Ｇ１１とする。また、図１３に示されるように、積層方向において互いに隣り合う蓄電モジュール１１２，１１２における第二樹脂部１５４同士の距離であって、延在方向における貫通孔１１４ａの端部１１４ｂ（端部１１４ｃ）に対向しておらず、貫通孔１１４ａの延在方向に沿う第二部分Ｐ２の距離を第二距離Ｇ１２とする。 Next, the distance between the above-described power storage modules 112 will be described with reference to FIGS. 12 is a side view of a part of the power storage device of FIG. 10 as viewed from the direction A, and FIG. 13 is a view of the power storage device of FIG. 12 from the direction in which the end portion of the through hole formed in the conductor can be seen from the front. FIG. As shown in FIG. 12, it is the distance between the second resin portions 154 in the power storage modules 112, 112 adjacent to each other in the stacking direction, and faces the end portion 114b (end portion 114c) of the through hole 114a in the extending direction. The distance of the 1st part P1 to perform is set to 1st distance G11. Further, as shown in FIG. 13, it is the distance between the second resin portions 154 in the power storage modules 112 and 112 adjacent to each other in the stacking direction, and the end portion 114b (end portion 114c) of the through hole 114a in the extending direction. The distance of the second portion P2 along the extending direction of the through hole 114a is defined as a second distance G12.
　ここで、第一部分Ｐ１における第一距離Ｇ１１は、第二部分Ｐ２における第二距離Ｇ１２よりも長い（Ｇ１１＞Ｇ１２）。図１３に示されるように、本実施形態では、第二部分Ｐ２では、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の第二樹脂部１５４，１５４同士が互いに接触している。すなわち、第二部分Ｐ２における第二距離Ｇ１２は０（ゼロ）である。また、貫通孔１１４ａの高さＧ２は、第一部分Ｐ１における第一距離Ｇ１１と同等、又はそれ以上であってもよい。 Here, the first distance G11 in the first portion P1 is longer than the second distance G12 in the second portion P2 (G11> G12). As shown in FIG. 13, in the present embodiment, in the second portion P2, the second resin portions 154 and 154 of the power storage modules 112 and 112 adjacent to each other in the stacking direction are in contact with each other. That is, the second distance G12 in the second portion P2 is 0 (zero). Further, the height G2 of the through hole 114a may be equal to or greater than the first distance G11 in the first portion P1.
　積層方向において互いに隣り合う蓄電モジュール１１２，１１２の一方には、第二樹脂部１５４，１５４同士が接触する部分に凸部１５４ｂが形成されており、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の他方には、第二樹脂部１５４，１５４同士が接触する部分に凸部１５４ｂを覆う凹部１５４ａが形成されている。そして、上記凸部１５４ｂ及び凹部１５４ａの一部又は全部は、弾性変形した状態で互いに接触している。 One of the power storage modules 112 and 112 adjacent to each other in the stacking direction is formed with a convex portion 154b at a portion where the second resin portions 154 and 154 are in contact with each other, and the power storage modules 112 and 112 adjacent to each other in the stacking direction. On the other side, a concave portion 154a that covers the convex portion 154b is formed at a portion where the second resin portions 154 and 154 contact each other. And the one part or all part of the said convex part 154b and the recessed part 154a is mutually contacting in the state elastically deformed.
　第２実施形態の蓄電装置１１０では、貫通孔１１４ａの端部１１４ｂ（端部１１４ｃ）に対向する第一部分Ｐ１における第二樹脂部１５４，１５４同士の第一距離Ｇ１１（図１２参照）が、貫通孔１１４ａの端部１１４ｂ（端部１１４ｃ）に対向しない第二部分Ｐ２の第二距離Ｇ１２（図１３参照）よりも長い。これにより、上記貫通孔１１４ａを介して流通する冷却風の通り道を確保しつつ、上記貫通孔１１４ａ以外に冷却風が流通することによる冷却風漏れを抑制することができる。この結果、効率的な放熱が可能となる。 In the power storage device 110 according to the second embodiment, the first distance G11 (see FIG. 12) between the second resin portions 154 and 154 in the first portion P1 facing the end portion 114b (end portion 114c) of the through hole 114a passes through. It is longer than the second distance G12 (see FIG. 13) of the second portion P2 that does not face the end portion 114b (end portion 114c) of the hole 114a. Accordingly, it is possible to suppress leakage of cooling air due to circulation of cooling air other than the through hole 114a while securing a passage for the cooling air flowing through the through hole 114a. As a result, efficient heat dissipation becomes possible.
　第２実施形態の蓄電装置１１０における第二部分Ｐ２では、図１３に示されるように、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の第二樹脂部１５４，１５４同士が互いに接触しているので、貫通孔１１４ａ以外に冷却風が流通することによる冷却風漏れを効果的に抑制することができる。 In the second portion P2 of the power storage device 110 of the second embodiment, as shown in FIG. 13, the second resin portions 154 and 154 of the power storage modules 112 and 112 adjacent to each other in the stacking direction are in contact with each other. Further, it is possible to effectively suppress the cooling air leakage due to the circulation of the cooling air other than the through hole 114a.
　第２実施形態の蓄電装置１１０では、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の第二樹脂部１５４，１５４同士が、弾性変形した状態で互いに接触しているので、導電体１１４の高さ方向（Ｚ軸方向）における寸法公差を吸収することができる。 In the power storage device 110 of the second embodiment, the second resin portions 154 and 154 of the power storage modules 112 and 112 adjacent to each other in the stacking direction are in contact with each other in an elastically deformed state. The dimensional tolerance in the direction (Z-axis direction) can be absorbed.
　第２実施形態の蓄電装置１１０では、図１３に示されるように、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の一方には、第二樹脂部１５４，１５４同士が接触する部分に凸部１５４ｂが形成されており、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の他方には、第二樹脂部１５４，１５４同士が接触する部分に凸部１５４ｂを覆う凹部１５４ａが形成されている。この場合も、例えば、導電体１１４の高さ方向における寸法公差を吸収することができる。 In the power storage device 110 of the second embodiment, as illustrated in FIG. 13, one of the power storage modules 112 and 112 adjacent to each other in the stacking direction has a convex portion 154 b at a portion where the second resin portions 154 and 154 are in contact with each other. In the other of the power storage modules 112 and 112 adjacent to each other in the stacking direction, a concave portion 154a that covers the convex portion 154b is formed at a portion where the second resin portions 154 and 154 are in contact with each other. Also in this case, for example, a dimensional tolerance in the height direction of the conductor 114 can be absorbed.
　第２実施形態の蓄電装置１１０では、導電体１１４に形成される貫通孔１１４ａの延在方向が、積層方向に配列される全ての導電体１１４において一致している。このため、組み付け時の作業性を向上させることができる。 In the power storage device 110 of the second embodiment, the extending direction of the through holes 114a formed in the conductor 114 is the same in all the conductors 114 arranged in the stacking direction. For this reason, the workability | operativity at the time of an assembly | attachment can be improved.
　第２実施形態の蓄電装置１１０では、枠体１５０は、電極板１３４の周縁部１３４ａに接合される枠体状の第一樹脂部１５２と、第一樹脂部１５２の外周面を覆い、第一樹脂部１５２を一体的に保持する第二樹脂部１５４と、を有している。このため、蓄電モジュール１１２における電解液の密閉性を高めることができる。 In the power storage device 110 of the second embodiment, the frame 150 covers the first resin portion 152 in the form of a frame joined to the peripheral edge portion 134a of the electrode plate 134 and the outer peripheral surface of the first resin portion 152, and the first And a second resin portion 154 that integrally holds the resin portion 152. For this reason, the sealing property of the electrolyte solution in the electrical storage module 112 can be improved.
　本発明は、上記実施形態に限定されない。 The present invention is not limited to the above embodiment.
　例えば、蓄電装置１０は、蓄電モジュール１２同士を電気的に接続する部材を更に備えてもよい。この場合、冷却部材１４が導電性を有していなくてもよい。したがって、冷却部材１４を様々な材料で構成することができる。冷却部材１４が絶縁性材料により構成されている場合、水等の導電性を有する冷媒が用いられても、冷媒を通じて、冷却部材１４同士の短絡が生じることを防止できる。なお、冷却部材１４が導電性を有している場合でも、例えば、流路１５ａの内面を絶縁体で覆うことにより、冷却部材１４及び冷媒が互いに電気的に絶縁されていれば、冷媒を通じて、冷却部材１４同士の短絡が生じることを防止できる。 For example, the power storage device 10 may further include a member that electrically connects the power storage modules 12 to each other. In this case, the cooling member 14 may not have conductivity. Therefore, the cooling member 14 can be made of various materials. When the cooling member 14 is made of an insulating material, it is possible to prevent a short circuit between the cooling members 14 through the refrigerant even when a conductive refrigerant such as water is used. Even when the cooling member 14 has conductivity, for example, if the cooling member 14 and the refrigerant are electrically insulated from each other by covering the inner surface of the flow path 15a with an insulator, It is possible to prevent a short circuit between the cooling members 14.
　注液口５０ａは、一対の第１側面１２ｂのそれぞれに設けられていてもよい。また、１つの第１側面１２ｂに、複数の注液口５０ａが第３方向Ｄ３に配列されて設けられていてもよい。このような複数の注液口５０ａによれば、電解液の注入にかかる時間を短縮することができる。 The liquid injection port 50a may be provided on each of the pair of first side surfaces 12b. In addition, a plurality of liquid injection ports 50a may be provided in one first side surface 12b and arranged in the third direction D3. According to such a plurality of liquid injection ports 50a, it is possible to shorten the time required for injection of the electrolytic solution.
　開口１５ｄの向く方向、及び注液口５０ａの向く方向は、互いに異なっていればよく、必ずしも直交していなくてもよい。また、流路１５ａの形状は限定されない。例えば、流路１５ａは直線状でなく、曲がっていてもよい。例えば、中央でＵ字状に折れ曲がった流路１５ａによれば、その両端の開口１５ｄを、例えば一方の第２側面１４ｃに集約することができる。この場合、注液口５０ａは他方の第２側面１４ｃ側（つまり、他方の第２側部５１ｂ）に設けられてもよい。この場合も、開口１５ｄの向く方向と、注液口５０ａの向く方向とは、互いに異なり、反対であるため、開口１５ｄは突出領域５２によって覆われない。これにより、開口１５ｄを通じて冷媒を効率よく流通させることができる。 The direction in which the opening 15d faces and the direction in which the liquid injection port 50a faces need only be different from each other, and need not necessarily be orthogonal. Moreover, the shape of the flow path 15a is not limited. For example, the flow path 15a is not linear and may be bent. For example, according to the flow path 15a bent in a U shape at the center, the openings 15d at both ends thereof can be concentrated on one second side face 14c, for example. In this case, the liquid injection port 50a may be provided on the other second side surface 14c side (that is, the other second side portion 51b). Also in this case, the direction toward the opening 15d and the direction toward the liquid injection port 50a are different from each other and are opposite to each other, and thus the opening 15d is not covered by the protruding region 52. Thereby, a refrigerant | coolant can be distribute | circulated efficiently through opening 15d.
　冷却部材１４には、流路１５ａが設けられていればよく、例えば、冷却部材１４が一対の板部材１５ｂのうちいずれかを有さず、第３方向Ｄ３から見て、櫛歯形状を呈していてもよい。つまり、流路１５ａは、貫通方向だけでなく、貫通方向に交差する方向に開放されていてもよい。 The cooling member 14 only needs to be provided with the flow path 15a. For example, the cooling member 14 does not have any one of the pair of plate members 15b and has a comb-teeth shape when viewed from the third direction D3. It may be. That is, the flow path 15a may be opened not only in the penetration direction but also in a direction intersecting the penetration direction.
　冷却部材１４は、第１方向Ｄ１から見て、蓄電モジュール１２と同じか、それよりも大きくてもよい。この場合、冷却部材１４による冷却効率の向上を図ることができる。また、各拘束プレート１６Ａ，１６Ｂは、第１方向Ｄ１から見て、蓄電モジュール１２、冷却部材１４及び絶縁フィルム２２と同じか、それよりも小さくてもよい。 The cooling member 14 may be the same as or larger than the power storage module 12 when viewed from the first direction D1. In this case, the cooling efficiency by the cooling member 14 can be improved. Moreover, each restraint plate 16A, 16B may be the same as the electrical storage module 12, the cooling member 14, and the insulating film 22, or smaller than it, seeing from the 1st direction D1.
　第２実施形態では、図１３に示されるように、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の一方には凸部１５４ｂが形成され、他方には凹部１５４ａが形成されている例を挙げて説明したが、図１５に示されるように、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の接触面は、両方とも平坦面であってもよい。また、図示はしないが、積層方向において互いに隣り合う蓄電モジュール１１２，１１２の接触面の少なくとも一方に凸部が形成されていてもよい。この場合、第二部分Ｐ２における第二距離Ｇ１２は０（ゼロ）となる。このような構成であっても、第一部分Ｐ１における第一距離Ｇ１１は、第二部分Ｐ２における第二距離Ｇ１２よりも長い（Ｇ１１＞Ｇ１２）ので、上記貫通孔１１４ａを介して流通する冷却風の通り道を確保しつつ、上記流路以外に冷却風が流通することによる冷却風漏れを抑制することができる。 In the second embodiment, as shown in FIG. 13, an example in which a convex portion 154 b is formed on one of the power storage modules 112 and 112 adjacent to each other in the stacking direction and a concave portion 154 a is formed on the other is given. Although described, as shown in FIG. 15, both contact surfaces of the power storage modules 112 and 112 adjacent to each other in the stacking direction may be flat surfaces. In addition, although not illustrated, a convex portion may be formed on at least one of the contact surfaces of the power storage modules 112 and 112 adjacent to each other in the stacking direction. In this case, the second distance G12 in the second portion P2 is 0 (zero). Even in such a configuration, the first distance G11 in the first portion P1 is longer than the second distance G12 in the second portion P2 (G11> G12), so that the cooling air flowing through the through hole 114a Cooling air leakage due to the circulation of cooling air in addition to the flow path can be suppressed while securing the passage.
　第２実施形態又は変形例では、貫通孔１１４ａの延在方向に沿う第二部分Ｐ２の距離である第二距離Ｇ１２を０（ゼロ）とする例を挙げて説明したが、例えば、図１６に示されるように、第二距離Ｇ１２は０（ゼロ）よりも大きく、かつ第一距離Ｇ１１よりも小さくてもよい。この場合であっても、上記貫通孔１１４ａを介して流通する冷却風の通り道を確保しつつ、上記流路以外に冷却風が流通することによる冷却風漏れを抑制することができる。 In the second embodiment or the modification, the second distance G12 that is the distance of the second portion P2 along the extending direction of the through hole 114a has been described as an example of 0 (zero). For example, FIG. As shown, the second distance G12 may be greater than 0 (zero) and smaller than the first distance G11. Even in this case, leakage of the cooling air due to the circulation of the cooling air in addition to the flow path can be suppressed while ensuring the passage of the cooling air flowing through the through hole 114a.
　第２実施形態又は変形例では、図１４に示されるように、上記導電体１１４に形成された貫通孔１１４ａは、導電体１１４において互いに対向する一方の側面１１４ｄから他方の側面１１４ｆまで連通している例を挙げて説明したが、例えば、一の側面１４ｅ又は一の側面１４ｇから隣り合う一つの側面１１４ｆ（側面１１４ｄ）まで連通していてもよい。 In the second embodiment or the modified example, as shown in FIG. 14, the through hole 114 a formed in the conductor 114 communicates from one side surface 114 d facing each other to the other side surface 114 f in the conductor 114. However, for example, one side surface 14e or one side surface 14g may communicate with one adjacent side surface 114f (side surface 114d).
　第２実施形態又は変形例では、冷却風が流通する流通路の例として導電体１１４に形成された貫通孔１１４ａを例に挙げて説明したが、例えば、少なくとも一方の表面に溝が形成された導電体１１４を終端電極の電極板１３４に接触させることによって、冷却風が流通する流通路を形成してもよい。 In the second embodiment or the modification, the through hole 114a formed in the conductor 114 is described as an example of the flow path through which the cooling air flows. For example, a groove is formed on at least one surface. A flow path through which cooling air flows may be formed by bringing the conductor 114 into contact with the electrode plate 134 of the termination electrode.
　また、第２実施形態又は変形例では、蓄電装置１１０がニッケル水素二次電池の例を挙げて説明したが、リチウムイオン二次電池であってもよい。この場合、正極活物質は、例えば複合酸化物、金属リチウム、硫黄等である。負極活物質は、例えば黒鉛、高配向性グラファイト、メソカーボンマイクロビーズ、ハードカーボン、及びソフトカーボン等のカーボン、リチウム及びナトリウム等のアルカリ金属、金属化合物、ＳｉＯｘ（０．５≦ｘ≦１．５）等の金属酸化物、並びにホウ素添加炭素等である。 In the second embodiment or the modification, the power storage device 110 is described as an example of a nickel hydride secondary battery, but may be a lithium ion secondary battery. In this case, the positive electrode active material is, for example, a composite oxide, metallic lithium, sulfur or the like. Examples of the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) And the like, as well as boron-added carbon.
　１０…蓄電装置、１２…蓄電モジュール、１４…冷却部材、１５ａ…流路（貫通孔）、１５ｂ…板部材、１５ｄ…開口、３０…積層体、３０ａ…側面、３２…バイポーラ電極、３４…電極板、３４ａ…縁部、３６…正極、３８…負極、５０…枠体、５０ａ…注液口、５１…本体領域、５２…突出領域、１１０…蓄電装置、１１２…蓄電モジュール、１１４…導電体、１１４ａ…貫通孔、１１４ｂ，１１４ｃ…端部（貫通孔の端部）、１３２…バイポーラ電極、１３４…電極板、１３４ａ…周縁部、１３６…正極層（正極）、１３８…負極層（負極）、１５０…枠体（シール部）、１５２…第一樹脂部（第一シール部）、１５４…第二樹脂部（第二シール部）、１５４ａ…凹部、１５４ｂ…凸部、Ｇ１１…第一距離、Ｇ１２…第二距離、Ｐ１…第一部分、Ｐ２…第二部分。 DESCRIPTION OF SYMBOLS 10 ... Power storage device, 12 ... Power storage module, 14 ... Cooling member, 15a ... Flow path (through hole), 15b ... Plate member, 15d ... Opening, 30 ... Laminated body, 30a ... Side, 32 ... Bipolar electrode, 34 ... Electrode Plate, 34a ... Edge, 36 ... Positive electrode, 38 ... Negative electrode, 50 ... Frame, 50a ... Liquid inlet, 51 ... Main body region, 52 ... Protrusion region, 110 ... Power storage device, 112 ... Power storage module, 114 ... Conductor , 114a ... through holes, 114b, 114c ... ends (ends of the through holes), 132 ... bipolar electrodes, 134 ... electrode plates, 134a ... peripheral parts, 136 ... positive electrode layer (positive electrode), 138 ... negative electrode layer (negative electrode) , 150 ... frame (seal part), 152 ... first resin part (first seal part), 154 ... second resin part (second seal part), 154a ... concave part, 154b ... convex part, G11 ... first distance , G12 ... second distance, P1 The first part, P2 ... the second part.

Claims (15)

  1. 　第１面及び前記第１面とは反対側の第２面を有する電極板と、前記第１面に設けられた正極と、前記第２面に設けられた負極と、をそれぞれ含む複数のバイポーラ電極が第１方向において積層された蓄電モジュールと、
    　冷媒の流通により前記蓄電モジュールを冷却する冷却部材と、を備え、
    　前記蓄電モジュールは、
    　　積層された前記複数のバイポーラ電極を有する積層体と、
    　　前記積層体の前記第１方向に延在する側面において前記電極板の縁部を保持する枠体と、を備え、
    　前記冷却部材は、前記第１方向において前記積層体と並んで配置され、
    　前記枠体は、
    　　前記側面を覆うと共に、前記枠体内に電解液を注入するための注液口が設けられた本体領域と、
    　　前記第１方向において前記注液口から離れるように前記本体領域から突出する突出領域と、を有し、
    　前記冷却部材には、前記冷却部材の内部に冷媒を流入させるため、又は前記冷却部材の内部から冷媒を流出させるための開口が設けられ、
    　前記注液口の向く方向及び前記開口の向く方向は、互いに異なっている、蓄電装置。     A plurality of bipolar plates each including an electrode plate having a first surface and a second surface opposite to the first surface, a positive electrode provided on the first surface, and a negative electrode provided on the second surface A power storage module in which electrodes are stacked in the first direction;
    A cooling member that cools the power storage module by circulating a refrigerant,
    The power storage module is:
    A laminate having the plurality of bipolar electrodes laminated;
    A frame that holds an edge of the electrode plate on a side surface extending in the first direction of the laminate,
    The cooling member is arranged side by side with the stacked body in the first direction,
    The frame is
    A main body region that covers the side surface and is provided with a liquid injection port for injecting an electrolyte into the frame,
    A projecting region projecting from the main body region so as to be separated from the liquid injection port in the first direction,
    The cooling member is provided with an opening for allowing the refrigerant to flow into the cooling member, or for flowing the refrigerant out of the cooling member,
    The power storage device, wherein a direction in which the liquid injection port faces and a direction in which the opening faces are different from each other.
  2. 　前記注液口の向く方向及び前記開口の向く方向は、互いに直交している、請求項１に記載の蓄電装置。 The power storage device according to claim 1, wherein a direction of the liquid injection port and a direction of the opening are orthogonal to each other.
  3. 　前記冷却部材には、冷媒を流通させる複数の流路が設けられ、
    　前記複数の流路は、前記第１方向に交差する第２方向に配列されると共に、前記第１方向及び前記第２方向に交差する第３方向に延在している、請求項２に記載の蓄電装置。     The cooling member is provided with a plurality of flow paths for circulating the refrigerant,
    The plurality of flow paths are arranged in a second direction that intersects the first direction and extend in a third direction that intersects the first direction and the second direction. Power storage device.
  4. 　前記冷却部材は、前記複数の流路を前記第１方向に挟む一対の板部材を有している、請求項３に記載の蓄電装置。 The power storage device according to claim 3, wherein the cooling member includes a pair of plate members that sandwich the plurality of flow paths in the first direction.
  5. 　前記冷却部材は、板状を呈し、
    　前記冷却部材には、前記冷却部材を前記第１方向に交差する方向において貫通する貫通孔が設けられている、請求項２に記載の蓄電装置。     The cooling member has a plate shape,
    The power storage device according to claim 2, wherein the cooling member is provided with a through-hole penetrating the cooling member in a direction intersecting the first direction.
  6. 　前記冷却部材は、導電性を有している、請求項１～請求項５のいずれか一項に記載の蓄電装置。 The power storage device according to any one of claims 1 to 5, wherein the cooling member has conductivity.
  7. 　前記冷媒は、絶縁性を有している、請求項１～請求項６のいずれか一項に記載の蓄電装置。 The power storage device according to any one of claims 1 to 6, wherein the refrigerant has an insulating property.
  8. 　一方向に配列された複数の蓄電モジュールと、
    　互いに隣り合う前記蓄電モジュールの両方に接触させた状態で配置される導電体と、を備え、
    　前記蓄電モジュールは、
    　第１面及び前記第１面とは反対側の第２面を有する電極板と、前記第１面に設けられた正極と、前記第２面に設けられた負極と、をそれぞれ含む複数のバイポーラ電極を、セパレータを介して積層してなる積層体と、
    　前記複数のバイポーラ電極の周縁部を保持すると共に前記積層体の側面を形成するシール部と、を有し、
    　前記導電体には、前記一方向に交差する方向に延在する流路が形成されており、
    　互いに隣り合う前記蓄電モジュールにおける前記シール部同士の距離であって、前記流路の延在方向における前記流路の端部に対向する第一部分の第一距離は、前記端部に対向しない第二部分の第二距離よりも長い、蓄電装置。     A plurality of power storage modules arranged in one direction;
    A conductor disposed in contact with both of the storage modules adjacent to each other, and
    The power storage module is:
    A plurality of bipolar plates each including an electrode plate having a first surface and a second surface opposite to the first surface, a positive electrode provided on the first surface, and a negative electrode provided on the second surface A laminate formed by laminating electrodes via separators;
    And holding a peripheral portion of the plurality of bipolar electrodes and forming a side surface of the laminate,
    In the conductor, a flow path extending in a direction intersecting the one direction is formed,
    The distance between the seal portions in the power storage modules adjacent to each other, and the first distance of the first portion facing the end portion of the flow channel in the extending direction of the flow channel is the second distance not facing the end portion. A power storage device longer than the second distance of the portion.
  9. 　前記流路は、直線状に延在しており、前記第二部分は、前記端部に対向しない部分であると共に前記流路の延在方向に沿う部分である、請求項８に記載の蓄電装置。 The electricity storage according to claim 8, wherein the flow path extends linearly, and the second portion is a portion that does not face the end portion and that is along a direction in which the flow path extends. apparatus.
  10. 　前記第二部分では、互いに隣り合う前記蓄電モジュールの前記シール部同士が互いに接触している、請求項８又は請求項９に記載の蓄電装置。 The power storage device according to claim 8 or 9, wherein in the second portion, the seal portions of the power storage modules adjacent to each other are in contact with each other.
  11. 　互いに隣り合う前記蓄電モジュールの前記シール部同士は、弾性変形した状態で互いに接触している、請求項１０に記載の蓄電装置。 The power storage device according to claim 10, wherein the seal portions of the power storage modules adjacent to each other are in contact with each other in an elastically deformed state.
  12. 　互いに隣り合う前記蓄電モジュールの少なくとも一方には、前記シール部同士が接触する部分に凸部が形成されている、請求項１０又は請求項１１に記載の蓄電装置。 The power storage device according to claim 10 or 11, wherein at least one of the power storage modules adjacent to each other has a convex portion formed at a portion where the seal portions are in contact with each other.
  13. 　互いに隣り合う前記蓄電モジュールの一方には、前記シール部同士が接触する部分に凸部が形成されており、互いに隣り合う前記蓄電モジュールの他方には、前記シール部同士が接触する部分に前記凸部を覆う凹部が形成されている、請求項１０又は請求項１１に記載の蓄電装置。 One of the energy storage modules adjacent to each other has a convex portion at a portion where the seal portions contact each other, and the other of the energy storage modules adjacent to each other has the protrusion at a portion where the seal portions contact each other. The electrical storage apparatus of Claim 10 or Claim 11 in which the recessed part which covers a part is formed.
  14. 　前記導電体に形成される前記流路の延在方向が、前記一方向に配列される全ての前記導電体において一致している、請求項８～請求項１３のいずれか一項に記載の蓄電装置。 The power storage according to any one of claims 8 to 13, wherein an extension direction of the flow path formed in the conductor is the same in all the conductors arranged in the one direction. apparatus.
  15. 　前記シール部は、前記電極板の周縁部に接合される枠体状の第一シール部と、前記第一シール部の外周面を覆い、前記第一シール部を一体的に保持する第二シール部と、を有している、請求項８～請求項１４のいずれか一項に記載の蓄電装置。 The seal portion includes a frame-shaped first seal portion joined to a peripheral portion of the electrode plate, and a second seal that covers an outer peripheral surface of the first seal portion and integrally holds the first seal portion. The power storage device according to any one of claims 8 to 14, further comprising:
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020030955A (en) * 2018-08-22 2020-02-27 株式会社豊田自動織機 Power storage module
WO2020138110A1 (en) * 2018-12-25 2020-07-02 トヨタ自動車株式会社 Bipolar battery and power storage device
WO2020137923A1 (en) * 2018-12-25 2020-07-02 株式会社豊田自動織機 Power storage device
JP2020140768A (en) * 2019-02-26 2020-09-03 株式会社豊田自動織機 Power storage module
CN112290158A (en) * 2019-07-10 2021-01-29 本田技研工业株式会社 Electricity storage module
WO2021095551A1 (en) * 2019-11-13 2021-05-20 株式会社豊田自動織機 Electrical storage device
CN113178610A (en) * 2020-01-24 2021-07-27 株式会社丰田自动织机 Electricity storage device
CN113178611A (en) * 2020-01-24 2021-07-27 株式会社丰田自动织机 Electricity storage device
CN114079111A (en) * 2020-08-11 2022-02-22 北京好风光储能技术有限公司 Large-scale vertical energy storage battery and energy storage container
JP2022037493A (en) * 2020-08-25 2022-03-09 株式会社豊田自動織機 Power storage device
CN115956280A (en) * 2020-09-30 2023-04-11 松下知识产权经营株式会社 Power storage module
US12444795B2 (en) 2018-12-25 2025-10-14 Kabushiki Kaisha Toyota Jidoshokki Power storage device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003017127A (en) * 2001-07-04 2003-01-17 Nissan Motor Co Ltd Battery system
WO2007082863A1 (en) * 2006-01-17 2007-07-26 Nilar International Ab A battery stack arrangement
JP2007305425A (en) * 2006-05-11 2007-11-22 Toyota Motor Corp Battery pack and vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003017127A (en) * 2001-07-04 2003-01-17 Nissan Motor Co Ltd Battery system
WO2007082863A1 (en) * 2006-01-17 2007-07-26 Nilar International Ab A battery stack arrangement
JP2007305425A (en) * 2006-05-11 2007-11-22 Toyota Motor Corp Battery pack and vehicle

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Publication number Priority date Publication date Assignee Title
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WO2020138110A1 (en) * 2018-12-25 2020-07-02 トヨタ自動車株式会社 Bipolar battery and power storage device
US12444795B2 (en) 2018-12-25 2025-10-14 Kabushiki Kaisha Toyota Jidoshokki Power storage device
JPWO2020138110A1 (en) * 2018-12-25 2021-10-28 トヨタ自動車株式会社 Bipolar battery and power storage device
CN113228390A (en) * 2018-12-25 2021-08-06 株式会社丰田自动织机 Electricity storage device
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JP7132871B2 (en) 2019-02-26 2022-09-07 株式会社豊田自動織機 storage module
CN112290158A (en) * 2019-07-10 2021-01-29 本田技研工业株式会社 Electricity storage module
WO2021095551A1 (en) * 2019-11-13 2021-05-20 株式会社豊田自動織機 Electrical storage device
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US20210234187A1 (en) * 2020-01-24 2021-07-29 Kabushiki Kaisha Toyota Jidoshokki Power storage device
US11715843B2 (en) * 2020-01-24 2023-08-01 Kabushiki Kaisha Toyota Jidoshokki Power storage device
US11552359B2 (en) * 2020-01-24 2023-01-10 Kabushiki Kaisha Toyota Jidoshokki Power storage device
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CN114079111A (en) * 2020-08-11 2022-02-22 北京好风光储能技术有限公司 Large-scale vertical energy storage battery and energy storage container
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