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WO2018142919A1 - Dispositif de stockage d'énergie - Google Patents

Dispositif de stockage d'énergie 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
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/001023
Other languages
English (en)
Japanese (ja)
Inventor
友規 神谷
耕二郎 田丸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
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/ja
Priority claimed from JP2017015512A external-priority patent/JP6828470B2/ja
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of WO2018142919A1 publication Critical patent/WO2018142919A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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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  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un dispositif de stockage d'énergie, comprenant un module de stockage d'énergie et un élément de refroidissement pour refroidir le module de stockage d'énergie par canalisation d'un fluide frigorigène. Le module de stockage d'énergie comprend un stratifié et un corps de cadre pour maintenir la partie de bord d'une plaque d'électrode sur une surface latérale du stratifié s'étendant dans une première direction. L'élément de refroidissement est disposé le long du stratifié dans la première direction. Le corps de cadre comprend : une région de corps recouvrant la surface latérale, la région de corps comprenant un trou d'injection pour injecter un électrolyte dans le corps de cadre; et une région saillante faisant saillie à partir de la région de corps de façon à être éloignée du trou d'injection dans la première direction. L'élément de refroidissement comprend une ouverture pour permettre au fluide frigorigène de s'écouler dans l'élément de refroidissement ou pour permettre au fluide frigorigène de s'écouler hors de l'intérieur de l'élément de refroidissement. Le trou d'injection et l'ouverture sont orientés vers des directions différentes.
PCT/JP2018/001023 2017-01-31 2018-01-16 Dispositif de stockage d'énergie Ceased WO2018142919A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017015908A JP6828471B2 (ja) 2017-01-31 2017-01-31 蓄電装置
JP2017-015512 2017-01-31
JP2017-015908 2017-01-31
JP2017015512A JP6828470B2 (ja) 2017-01-31 2017-01-31 蓄電装置

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WO2018142919A1 true WO2018142919A1 (fr) 2018-08-09

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JP2020030955A (ja) * 2018-08-22 2020-02-27 株式会社豊田自動織機 蓄電モジュール
WO2020138110A1 (fr) * 2018-12-25 2020-07-02 トヨタ自動車株式会社 Batterie bipolaire et dispositif de stockage d'énergie
JP2020102412A (ja) * 2018-12-25 2020-07-02 株式会社豊田自動織機 蓄電装置
JP2020140768A (ja) * 2019-02-26 2020-09-03 株式会社豊田自動織機 蓄電モジュール
CN112290158A (zh) * 2019-07-10 2021-01-29 本田技研工业株式会社 蓄电模块
WO2021095551A1 (fr) * 2019-11-13 2021-05-20 株式会社豊田自動織機 Dispositif de stockage électrique
CN113178610A (zh) * 2020-01-24 2021-07-27 株式会社丰田自动织机 蓄电装置
CN113178611A (zh) * 2020-01-24 2021-07-27 株式会社丰田自动织机 蓄电装置
CN114079111A (zh) * 2020-08-11 2022-02-22 北京好风光储能技术有限公司 一种大型竖式储能电池以及储能集装箱
JP2022037493A (ja) * 2020-08-25 2022-03-09 株式会社豊田自動織機 蓄電装置
CN115956280A (zh) * 2020-09-30 2023-04-11 松下知识产权经营株式会社 蓄电模块
US12444795B2 (en) 2018-12-25 2025-10-14 Kabushiki Kaisha Toyota Jidoshokki Power storage device

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JP7042193B2 (ja) 2018-08-22 2022-03-25 株式会社豊田自動織機 蓄電モジュール
JP2020030955A (ja) * 2018-08-22 2020-02-27 株式会社豊田自動織機 蓄電モジュール
JP7152948B2 (ja) 2018-12-25 2022-10-13 株式会社豊田自動織機 蓄電装置
WO2020138110A1 (fr) * 2018-12-25 2020-07-02 トヨタ自動車株式会社 Batterie bipolaire et dispositif de stockage d'énergie
US12444795B2 (en) 2018-12-25 2025-10-14 Kabushiki Kaisha Toyota Jidoshokki Power storage device
JPWO2020138110A1 (ja) * 2018-12-25 2021-10-28 トヨタ自動車株式会社 バイポーラ電池および蓄電装置
CN113228390A (zh) * 2018-12-25 2021-08-06 株式会社丰田自动织机 蓄电装置
JP7084498B2 (ja) 2018-12-25 2022-06-14 トヨタ自動車株式会社 蓄電装置
WO2020137923A1 (fr) * 2018-12-25 2020-07-02 株式会社豊田自動織機 Dispositif de stockage d'énergie
JP2020102412A (ja) * 2018-12-25 2020-07-02 株式会社豊田自動織機 蓄電装置
JP2020140768A (ja) * 2019-02-26 2020-09-03 株式会社豊田自動織機 蓄電モジュール
JP7132871B2 (ja) 2019-02-26 2022-09-07 株式会社豊田自動織機 蓄電モジュール
CN112290158A (zh) * 2019-07-10 2021-01-29 本田技研工业株式会社 蓄电模块
WO2021095551A1 (fr) * 2019-11-13 2021-05-20 株式会社豊田自動織機 Dispositif de stockage électrique
CN113178610A (zh) * 2020-01-24 2021-07-27 株式会社丰田自动织机 蓄电装置
CN113178611A (zh) * 2020-01-24 2021-07-27 株式会社丰田自动织机 蓄电装置
JP2021118072A (ja) * 2020-01-24 2021-08-10 株式会社豊田自動織機 蓄電装置
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
JP7430537B2 (ja) 2020-01-24 2024-02-13 株式会社豊田自動織機 蓄電装置
CN114079111A (zh) * 2020-08-11 2022-02-22 北京好风光储能技术有限公司 一种大型竖式储能电池以及储能集装箱
CN114079111B (zh) * 2020-08-11 2023-11-14 好风光储能技术(成都)有限公司 一种大型竖式储能电池以及储能集装箱
JP7491776B2 (ja) 2020-08-25 2024-05-28 株式会社豊田自動織機 蓄電装置
JP2022037493A (ja) * 2020-08-25 2022-03-09 株式会社豊田自動織機 蓄電装置
CN115956280A (zh) * 2020-09-30 2023-04-11 松下知识产权经营株式会社 蓄电模块

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