[go: up one dir, main page]

WO2018150723A1 - Module de stockage d'énergie - Google Patents

Module de stockage d'énergie Download PDF

Info

Publication number
WO2018150723A1
WO2018150723A1 PCT/JP2017/045803 JP2017045803W WO2018150723A1 WO 2018150723 A1 WO2018150723 A1 WO 2018150723A1 JP 2017045803 W JP2017045803 W JP 2017045803W WO 2018150723 A1 WO2018150723 A1 WO 2018150723A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
seal portion
thickness
storage module
seal
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/JP2017/045803
Other languages
English (en)
Japanese (ja)
Inventor
田丸耕二郎
前田紘樹
奥田真也
遠藤諭史
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
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of WO2018150723A1 publication Critical patent/WO2018150723A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01G11/66—Current collectors
    • H01G11/72—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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • 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 storage module.
  • an electricity storage module having a laminate in which a positive electrode is provided on one side of an electrode plate and a bipolar electrode having a negative electrode provided on the other side is stacked.
  • a bipolar battery storage module
  • a current collector electrode plate
  • a seal layer is provided so as to surround the peripheral portion of the current collector, and the adjacent seal layers are adhered to each other.
  • second seal portion that surrounds the side surfaces of all the seal layers (first seal portion) and retains all the seal layers.
  • the second seal portion surrounding all the first seal portions is formed by injection molding
  • the periphery of the first seal portion can not be pressed by a mold or the like, so that the second seal portion is injection molded.
  • the flow of the resin may cause the outer edge of the first seal portion disposed on the end side in the stacking direction of the laminate to curl up.
  • the second seal portion can not sufficiently surround the first seal portion that is curled up, or a portion of the second seal portion that is not filled with resin is generated in the curled-up portion.
  • a gap may be generated between the first seal portion and the second seal portion, which may reduce the airtightness of the storage module.
  • An object of the present invention is to provide a power storage module capable of suppressing a reduction in air tightness.
  • An electricity storage module is an electricity storage device having a bipolar electrode including a positive electrode layer provided on the first surface of the electrode plate and a negative electrode layer provided on the second surface opposite to the first surface.
  • An end of the bipolar electrode group in which the bipolar electrodes are stacked via the separator and the bipolar electrode group disposed at both ends in the stacking direction of the bipolar electrode group via the separator and the positive electrode layer or the negative electrode layer is provided only on the first surface of the electrode plate
  • the protruding portion is a first structure formed by a part of the first seal portion, a second structure formed by a resin member different from the first seal portion, and a resin member fixed to the first seal portion
  • the thickness of the outermost seal portions disposed at both ends in the lamination direction of the laminate is the lamination.
  • the thickness of the resin member is larger than the thickness of the first seal portion, in the case of the third structure.
  • the total value of the thickness of the resin member and the thickness of the first seal portion to which the resin member is fixed is larger than the thickness of the first seal portion.
  • the storage module includes a frame-like protruding portion that protrudes in the stacking direction from the peripheral edge portion of the terminal electrode, and the second seal portion integrally joins the first seal portion and the protruding portion. Further, this projecting portion is a part of the first seal portion (first structure), a resin member (second structure) different from the first seal portion, and a resin member (third structure) fixed to the first seal portion Or the like.
  • the thickness of the outermost seal portion of the laminate is larger than the thickness of the first seal portion disposed between the outermost seal portions, and in the second direction, the thickness of the resin member is the first seal
  • the sum of the thickness of the resin member and the thickness of the first seal portion to which the resin member is fixed is larger than the thickness of the portion, and is larger than the thickness of the first seal portion.
  • the seal portion holding the peripheral portion of the electrode plate disposed in the outermost layer may curl up. Be suppressed. Therefore, the protrusion and the first seal can be sufficiently connected by the second seal. By the above, the airtightness of the storage module can be suppressed.
  • the thickness of the termination electrode may be larger than the thickness of the electrode plate of the bipolar electrode.
  • the electrode plate is provided with a surface treatment portion that strengthens the bonding with the first seal portion.
  • the surface treatment portion has a first surface and a second surface. Only one of the faces may be provided, and one face may be disposed in the same direction in the stacking direction. By this configuration, it is possible to strengthen the bonding between the electrode plate and the first seal portion while minimizing the portion forming the surface treatment portion.
  • the surface treatment portion may be provided only on one of the first surface and the second surface. According to this configuration, it is possible to further strengthen the bonding between the terminal electrode and the projection while minimizing the portion for forming the surface treatment portion.
  • one surface of the termination electrode may be the second surface.
  • the frame-like protruding portion protrudes in the stacking direction from the second surface of the terminal electrode.
  • the surface treatment unit can strengthen the bonding between the terminal electrode (electrode plate) and the resin member.
  • one surface of the terminal electrode and one surface of the electrode plate of the bipolar electrode may be arranged in the same direction in the stacking direction.
  • the surface treatment portion is provided on the surface of all the electrode plates of the laminate disposed in the same direction, the simple configuration can suppress the decrease in the airtightness of the storage module.
  • FIG. 1 is a schematic cross-sectional view showing an embodiment of a power storage device provided with a power storage module.
  • FIG. 2 is a schematic cross-sectional view showing the storage module of FIG.
  • FIG. 3 is an enlarged cross-sectional view of the peripheral portion of the terminal electrode and the peripheral portion of the bipolar electrode.
  • FIG. 4 is an expanded sectional view of the surface of a current collection board, and a surface treatment part.
  • FIG. 5 is an enlarged cross-sectional view of the peripheral portion of the terminal electrode and the peripheral portion of the bipolar electrode according to a modification.
  • FIG. 6 is an enlarged cross-sectional view of the peripheral portion of the terminal electrode according to the modification and the peripheral portion of the bipolar electrode.
  • FIG. 1 is a schematic cross-sectional view showing an embodiment of a power storage device provided with a power storage module.
  • FIG. 2 is a schematic cross-sectional view showing the storage module of FIG.
  • FIG. 3 is an enlarged cross-sectional view of the peripheral portion of
  • FIG. 7 is a schematic cross-sectional view showing a storage module according to a modification.
  • FIG. 8 is a schematic cross-sectional view showing a storage module according to a modification.
  • FIG. 9 is a schematic cross-sectional view showing a storage module according to a modification.
  • Power storage device 10 shown in FIG. 1 is used, for example, as a battery of various vehicles such as a forklift, a hybrid car, and an electric car.
  • the storage module 12 is, for example, a bipolar battery.
  • Examples of the storage module 12 include secondary batteries such as a nickel hydrogen secondary battery and a lithium ion secondary battery, but may be an electric double layer capacitor. The following description exemplifies a nickel-hydrogen secondary battery.
  • the plurality of storage modules 12 are stacked via a conductor 14 such as a metal plate to form an array 11.
  • the conductor 14 is one metal body disposed between the power storage modules 12 and 12 adjacent to each other, and is disposed in contact with both of the power storage modules 12 and 12 adjacent to each other.
  • the conductor 14 is formed of, for example, a metal material such as aluminum or copper.
  • the storage module 12 and the conductor 14 When viewed from the stacking direction (Z direction), the storage module 12 and the conductor 14 have, for example, a rectangular shape.
  • the conductor 14 is smaller than the storage module 12, but may be the same as or larger than the storage module 12.
  • Conductor 14 is electrically connected to adjacent power storage module 12. Thereby, the plurality of power storage modules 12 are connected in series in the stacking direction.
  • the conductors 14 are also disposed outside the storage modules 12 positioned at both ends in the stacking direction of the storage modules 12. That is, the conductors 14 are also disposed at both ends of the array 11 in the stacking direction.
  • the positive electrode terminal 24 is connected to the conductor 14 located at one end
  • the negative electrode terminal 26 is connected to the conductor 14 located at the other end.
  • the positive electrode terminal 24 may be integral with the conductor 14 to be connected.
  • the negative electrode terminal 26 may be integral with the conductor 14 to be connected.
  • the positive electrode terminal 24 and the negative electrode terminal 26 extend in the direction (X direction) intersecting the stacking direction. The charge and discharge of the power storage device 10 can be performed by the positive electrode terminal 24 and the negative electrode terminal 26.
  • the conductor 14 can also function as a heat sink for releasing the heat generated in the storage module 12.
  • a refrigerant such as air
  • Each through hole 14 a extends, for example, in a direction (Y direction) intersecting the stacking direction.
  • the storage device 10 can include a storage member 12 and a restraining member 15 that restrains the conductors 14 in the stacking direction.
  • the restraint member 15 includes a pair of restraint plates 16 and 17 and a connection member (bolt 18 and nut 20) for coupling the restraint plates 16 and 17 to each other.
  • an insulating film 22 such as a resin film is disposed between the restraint plates 16 and 17 and the conductor 14.
  • Each restraint plate 16 and 17 is made of, for example, a metal such as iron.
  • each of the restraint plates 16 and 17 and the insulating film 22 has, for example, a rectangular shape.
  • the insulating film 22 is larger than the conductor 14, and the restraint plates 16 and 17 are larger than the storage module 12.
  • an insertion hole 16 a through which the shaft portion of the bolt 18 is inserted is provided at the edge of the restraint plate 16 at a position outside the storage module 12.
  • an insertion hole 17 a through which the shaft portion of the bolt 18 is inserted is provided at the outer edge of the storage module 12 at the edge of the restraint plate 17.
  • the insertion holes 16 a and the insertion holes 17 a are located at the corners of the restraint plates 16 and 17.
  • One restraint plate 16 is abutted against the conductor 14 connected to the negative electrode terminal 26 via the insulating film 22, and the other restraint plate 17 is attached to the conductor 14 connected to the positive electrode terminal 24. It is hit through.
  • the bolt 18 is, for example, passed through the insertion hole 16 a from one restraint plate 16 side toward the other restraint plate 17 side, and a nut 20 is screwed into the tip of the bolt 18 projecting from the other restraint plate 17. ing.
  • the insulating film 22, the conductor 14, and the storage module 12 are sandwiched and unitized, and a restraining load is applied in the stacking direction.
  • the storage module 12 includes a stacked body 30 having a bipolar electrode group 33 in which a plurality of bipolar electrodes 32 are stacked.
  • the stacked body 30 When viewed from the stacking direction of the bipolar electrode group 33 (the Z direction, which is the same as the stacking direction of the storage module 12 and the conductor 14), the stacked body 30 has, for example, a rectangular shape.
  • a separator 40 is disposed between the bipolar electrodes 32, 32 adjacent to each other. That is, the bipolar electrodes 32 of the bipolar electrode group 33 are stacked via the separator 40.
  • the bipolar electrode 32 includes an electrode plate 34, a positive electrode layer 36 provided on a first surface 34s of the electrode plate 34, and a negative electrode layer 38 provided on a second surface 34t opposite to the first surface 34s. Including.
  • the positive electrode layer 36 of one bipolar electrode 32 faces the negative electrode layer 38 of one bipolar electrode 32 adjacent in the stacking direction with the separator 40 interposed therebetween, and the negative electrode layer 38 of one bipolar electrode 32 It faces the positive electrode layer 36 of the other bipolar electrode 32 adjacent in the stacking direction with the separator 40 interposed therebetween.
  • the terminal electrodes 35 in which the positive electrode layer 36 or the negative electrode layer 38 is provided only on the first surface 34s of the electrode plate 34 are disposed at both ends in the lamination direction. Specifically, in the stacking direction, the termination electrode 35 (negative electrode side termination electrode) having the negative electrode layer 38 disposed on the inner side surface (first surface 34s) is disposed at one end of the laminate 30 The termination electrode 35 (positive electrode side termination electrode) in which the positive electrode layer 36 is disposed on the inner side surface (first surface 34s) is disposed.
  • the thickness D1 of the terminal electrode 35 is larger than the thickness D2 of the electrode plate 34 of the bipolar electrode 32.
  • the thickness D1 of the terminal electrode 35 is, for example, 250 to 1000 ⁇ m.
  • “thickness” refers to the length (dimension) in the stacking direction (Z direction).
  • the negative electrode layer 38 of the negative electrode side termination electrode faces the positive electrode layer 36 of the uppermost bipolar electrode 32 with the separator 40 in between.
  • the positive electrode layer 36 of the positive electrode side termination electrode faces the negative electrode layer 38 of the lowermost bipolar electrode 32 via the separator 40.
  • the electrode plates 34 of the terminal electrodes 35 are connected to the adjacent conductors 14 (see FIG. 1).
  • a frame-shaped first seal portion 52 that holds the peripheral portion 34 a of the electrode plate 34 is joined to the peripheral portion 34 a of the electrode plate 34.
  • the first seal portion 52 is provided in the laminate 30 from one surface (the first surface 34s on which the positive electrode layer 36 is formed) of the electrode plate 34 of the bipolar electrode 32 to the end surface of the electrode plate 34 in the peripheral portion 34a.
  • each first seal portion 52 is provided over the entire periphery of the peripheral portion 34 a of each electrode plate 34.
  • the first seal portions 52, 52 adjacent to each other are arranged in contact in the stacking direction.
  • the stacked body 30 is in a state in which the electrode plates 34 are stacked at a constant interval by arranging the first seal portions 52 in this manner.
  • the first seal portions 52, 52 adjacent to each other are not joined at the portions in contact with each other, but are joined together by a second seal portion 54 described later.
  • the first seal portion 52 is welded at the surface extending to the outside of the other surface (the second surface 34 t on which the negative electrode layer 38 is formed) of the electrode plate 34 of each bipolar electrode 32.
  • the peripheral portion 34 a of the electrode plate 34 of each bipolar electrode 32 is buried and held in the first seal portion 52.
  • the peripheral portions 34 a of the electrode plate 34 disposed at both ends of the laminated body 30 are welded to the first seal portion 52 or the first seal portion 52 In a state of being buried in the resin member 56 (described later).
  • an internal space V airtightly partitioned by the electrode plates 34 and 34 and the first seal portion 52 is formed between the electrode plates 34 and 34 adjacent to each other in the stacking direction.
  • an electrolytic solution (not shown) made of an alkaline solution such as a potassium hydroxide aqueous solution is accommodated.
  • the storage module 12 includes frame-like protruding portions 50 provided at both ends of the stacked body 30 in the stacking direction.
  • the protruding portion 50 protrudes from the peripheral edge portion 35 a of the terminal electrode 35 in the stacking direction.
  • the projecting portion 50 is formed of a resin member 56 welded to the first seal portion 52.
  • the case where the projecting portion 50 is formed of the resin member 56 welded to the first seal portion 52 is referred to as a “third structure”.
  • the "first structure” and the "second structure” will be described later.
  • the resin member 56 is disposed overlapping with the first seal portion 52 when viewed in the stacking direction, and is welded to the first seal portion at a portion in contact with the first seal portion 52.
  • the resin member 56 and the first seal portion 52 are not limited to the configuration in which they are welded to each other, and may be adhered to each other, for example.
  • the resin member 56 is provided from one surface (the first surface 34s for the positive electrode side termination electrode and the second surface for the negative electrode side termination electrode) of the termination electrode 35 to the end face of the electrode plate 34 at the peripheral portion 35a.
  • a total value D5 of the thickness D4 of the resin member 56 disposed at the other end of the laminate and the thickness D3 of the first seal portion 52 to which the resin member 56 is welded is larger than the thickness D3 of the first seal portion 52.
  • a total value D51 of the thickness D41 of the resin member 56 disposed at one end of the laminate and the thickness D3 of the first seal portion 52 to which the resin member 56 is welded is larger than the thickness D3 of the first seal portion 52 .
  • Each of the total values D5 and D51 is, for example, 1.5 to 2.0 times the thickness D3 of the first seal portion 52.
  • Each of the thicknesses D4 and D41 of the resin member 56 is, for example, 100 to 500 ⁇ m, and each of the total values D5 and D51 is, for example, 300 to 1000 ⁇ m.
  • the storage module 12 includes a second seal that holds the stack 30 and the resin member 56 on the side surface 30 a of the stack 30 extending in the stacking direction.
  • the second seal portion 54 is configured to surround the side surface 30 a of the laminate 30.
  • the side surface 54 a of the second seal portion 54 has, for example, a rectangular shape when viewed from the stacking direction. In this case, the side surface 54a is composed of four rectangular surfaces.
  • the second seal portion 54 is a tubular portion extending over the entire length of the laminate 30 in the stacking direction.
  • the second seal portion 54 covers the outer side surface of the first seal portion 52 and the resin member 56 at the inner side surface extending in the stacking direction of the bipolar electrode 32.
  • the second seal portion 54 is integrally formed with the first seal portion 52 and the resin member 56 by injection molding.
  • the electrode plate 34 is, for example, a rectangular metal foil made of nickel.
  • the peripheral 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 a region where the first sealed portion 52 is buried and held.
  • Nickel hydroxide is contained in the example of the positive electrode active material which comprises the positive electrode layer 36.
  • FIG. Examples of the negative electrode active material constituting the negative electrode layer 38 include a hydrogen storage alloy.
  • the formation region of the negative electrode layer 38 on the second surface 34 t of the electrode plate 34 is slightly larger than the formation region of the positive electrode layer 36 on the first surface 34 s of the electrode plate 34.
  • the electrode plate 34 may be formed of a Ni-plated iron foil or a conductive resin.
  • the separator 40 is formed, for example, in a sheet shape.
  • the material for forming the separator 40 include porous films made of polyolefin resins such as polyethylene (PE) and polypropylene (PP), woven and non-woven fabrics made of polypropylene and the like.
  • the separator 40 may be reinforced with a vinylidene fluoride resin compound or the like.
  • the first seal portion 52, the second seal portion 54, and the resin member 56 are formed of, for example, an insulating resin.
  • resin materials constituting each of the first seal portion 52, the second seal portion 54, and the resin member 56 include polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), and the like.
  • the electrode plate 34 has a surface treatment portion 60 that strengthens the bonding with the first seal portion 52.
  • the surface treatment unit 60 is provided only on one surface (first surface 34s).
  • the surface treatment unit 60 is provided only on one surface (the first surface 34s of the positive electrode terminal electrode and the second surface 34t of the negative electrode terminal electrode).
  • One surface of the terminal electrode 35 and one surface of the electrode plate 34 of the bipolar electrode 32 are arranged in the same direction in the stacking direction. Therefore, the surface treatment unit 60 is provided on the surfaces of all the electrode plates 34 of the laminate 30 arranged in the same direction.
  • the surface treatment unit 60 is formed on the entire area of one surface of all the electrode plates 34 of the laminate 30.
  • the surface treatment unit 60 may be formed in a region in which one of the frame-shaped first seal 52 and the frame-shaped resin member 56 is disposed.
  • the surface treatment unit 60 can be formed of an electrolytic plating layer obtained by electrolytic plating on the electrode plate 34.
  • the electrolytic plating layer is a roughened plating layer formed on the surface of the electrolytic foil constituting the electrode plate 34.
  • the electrolytic foil is obtained, for example, by immersing the drum and the anode in an electrolytic solution containing nickel cations, and applying a predetermined current between the drum and the anode to precipitate nickel on the surface of the drum.
  • fine projections 34 d are formed on the surface of the electrolytic foil opposite to the drum.
  • the electrolytic plating layer is obtained by depositing nickel on the surface of the electrolytic foil on the drum until the thickness becomes constant.
  • the nickel is deposited on the projections 34 d of the electrolytic foil.
  • current concentration occurs in the convex portion 34d, and nickel is selectively deposited so that the convex portion 34d is used as the base end 62.
  • the surface treatment portion 60 is formed by the plurality of protrusions 61 grown in this manner. The above process is the electrolytic plating process.
  • the surface treatment unit 60 shown in FIG. 4 has a plurality of protrusions 61 projecting in the stacking direction from one surface by electrolytic plating. Each protrusion 61 reaches the tip along the stacking direction with the protrusion 34 d as the base end.
  • the protrusions 61 are disposed along the direction (X direction and Y direction) intersecting the stacking direction.
  • the protrusions 61 include a plurality of substantially spherical deposited metals (applied substances) formed by the electrolytic plating process.
  • the precipitation metal overlaps each other, so that in the projection 61, an enlarged portion in which the base end 62 (the length (dimension) in the direction crossing the stacking direction) is larger than the width of the projection 61 at the base end 62 64 are formed. That is, the protrusion 61 has a shape that becomes thicker in the direction from the base end 62 side to the tip end 63 side.
  • the position of the enlarged portion 64 in the projection 61 may not necessarily be at the tip 63 but is at least closer to the tip 63 than the proximal end 62.
  • the position of the enlarged portion 64 in the protrusion 61 may be different for each protrusion 61 depending on the overlapping manner of the deposited metal.
  • a portion 52 a of the first seal portion 52 is interposed between the projections 61, 61 adjacent to each other.
  • the first seal portion 52 formed of resin is molded such that a portion 52 a of the first seal portion 52 is interposed between the protrusions 61 at the time of molding.
  • the protrusions 61, 61 adjacent to each other restrict the movement of the part 52a of the first seal portion 52 interposed away from the proximal end 62.
  • the cross-sectional shape between the protrusions 61 adjacent to each other is an undercut shape that exerts an anchor effect.
  • the thickness D4 of the resin member 56 disposed at the other end of the laminate 30 and the thickness D3 of the first seal portion 52 to which the resin member 56 is welded is larger than the thickness D3 of the first seal portion 52.
  • a total value D51 of the thickness D41 of the resin member 56 disposed at one end of the laminate 30 and the thickness D3 of the first seal portion 52 to which the resin member 56 is welded is larger than the thickness D3 of the first seal portion 52 .
  • the protrusions 50 formed in this manner can form a portion that is higher in rigidity than the other portions at both ends in the stacking direction of the stacked body 30.
  • the second seal portion 54 surrounding the side surface 30a of the laminate 30 is formed by, for example, injection molding, the peripheral portion 34a of the electrode plate 34 (terminal electrode 35) disposed in the outermost layer It is suppressed that the seal part (the 1st seal part 52 and the resin member 56) which holds these two rolls up. Therefore, the protrusion 50 and the first seal portion 52 can be sufficiently connected by the second seal portion 54.
  • the airtightness of the storage module 12 can be suppressed from being reduced.
  • the thickness D 1 of the terminal electrode 35 is larger than the thickness D 2 of the electrode plate 34 of the bipolar electrode 32.
  • the electrode plate 34 is provided with a surface treatment portion 60 for strengthening the bonding with the first seal portion 52, and the surface of the electrode plate 34 of the bipolar electrode 32 is
  • the processing unit 60 is provided only on one of the first surface 34s and the second surface 34t, and the one surface is disposed in the same direction in the stacking direction. According to this configuration, the bonding between the electrode plate 34 and the first seal portion 52 can be strengthened while minimizing the portion where the surface treatment portion 60 is formed. Furthermore, since the surface treatment unit 60 is formed on the entire area of one surface, bonding between the electrode plate 34 and the positive electrode active material or the negative electrode active material can be strengthened.
  • the surface treatment unit 60 is provided only on one of the first surface 34 s and the second surface 34 t. According to this configuration, it is possible to strengthen the bonding between the terminal electrode 35 and the protrusion 50 while minimizing the portion where the surface treatment portion 60 is formed.
  • one surface of the terminal electrode 35 and one surface of the electrode plate 34 of the bipolar electrode 32 are arranged in the same direction in the stacking direction.
  • surface treatment unit 60 is provided on the surface of all electrode plates 34 of stacked body 30 arranged in the same direction, so that the airtightness of power storage module 12 can be prevented from being reduced by a simple configuration. .
  • the electrode plate 34 of the laminated body 30 may include an electrode plate 34A in which the surface treatment unit 60 is provided on one surface arranged in a direction different from that of the other electrode plates 34.
  • the surface treatment unit 60 faces one surface (the second surface 34t of each of the positive electrode-side termination electrode and the negative electrode-side termination electrode) facing outward in the stacking direction of the laminate 30.
  • the surface treatment portion 60 may be provided on the end electrode 35 disposed on one side which is disposed in a direction (opposite direction) different from each other.
  • one surface of each of the termination electrodes 35 is the second surface 34t.
  • the frame-like protrusion 50 protrudes from the second surface 34t of the terminal electrode 35 in the stacking direction. That is, the surface treatment unit 60 is provided on one side of each of the terminal electrodes 35 on which the resin member 56 is disposed. Thus, the surface treatment unit 60 can strengthen the bonding between the terminal electrode 35 (electrode plates 34 and 34A) and the resin member 56.
  • the said embodiment and modification demonstrated and demonstrated the structure in which the surface treatment part 60 is provided only in one side in all the electrode plates 34 of the laminated body 30, the electrode plate 34 of the laminated body 30 was demonstrated.
  • the electrode plate 34B in which the surface treatment unit 60 is provided on both sides may be included in a part of the above.
  • the surface treatment portion 60 is provided only on one side of the terminal electrode 35 disposed at one end of the stacked body 30, and the electrode plates 34 of all the bipolar electrodes 32,
  • the surface treatment unit 60 is provided on both sides of the terminal electrode 35 disposed at the other end of the laminate 30.
  • the surface treatment unit 60 can strengthen the bonding between the terminal electrode 35 and the resin member 56 and the bonding between the terminal electrode 35 and the first seal part 52. Therefore, the airtightness of the storage module 12B can be further suppressed.
  • the frame-like protruding portions 50 provided at both ends of the stacked body 30 are formed by the resin member 56 welded to the first seal portion 52.
  • the protrusion may be a protrusion 50C formed of a resin member 56C different from the first seal 52 (second structure).
  • the thickness D6 of the resin member 56C is different from the thickness D4 of the resin member 56. Further, the resin member 56C is the same as the resin member 56 in the other configuration. However, unlike the above embodiment, the resin member 56C may not be welded to the first seal portion 52, or may be welded to the first seal portion 52.
  • the thickness D6 of the resin member 56C is larger than the thickness D3 of the first seal portion 52.
  • the thickness D6 of the resin member 56C is, for example, 1.5 to 2.0 times the thickness D3 of the first seal portion 52.
  • the thickness D6 of the resin member 56C is, for example, 300 to 1000 ⁇ m.
  • the thickness D6 of the resin member 56C is larger than the thickness D3 of the first seal portion 52.
  • the protruding portions 50 ⁇ / b> C formed in this manner can form a portion that is higher in rigidity than the other portions at both ends in the stacking direction of the stacked body 30. Therefore, this configuration also makes it possible to suppress the reduction in the airtightness of power storage module 12C.
  • the protrusion 50 is provided at one end of the stacked body 30 in the stacking direction, and the protrusion 50C is provided at the other end.
  • the storage module may include the protrusion 50 formed by the third structure and the protrusion 50C formed by the second structure. At each of one end and the other end of the stack 30, protrusions may be formed by structures different from each other.
  • the peripheral portion 34 a of the electrode plate 34 of the bipolar electrode 32 is disposed in the first seal portion 52.
  • the first seal portion 52 may be provided from each of the first surface 34s and the second surface 34t of the electrode plate 34 of the bipolar electrode 32 to the end surface of the electrode plate 34 in the peripheral portion 34a.
  • the storage module 12E includes the protruding portion 50E, and the second seal portion 54 integrally joins the first seal portion 52.
  • the protruding portion 50E is formed of a part of the outermost seal portion 52E which is the first seal portion 52 disposed at both ends of the stacked body 30 in the stacking direction (first structure).
  • the thickness D7 of the outermost seal portion 52E is larger than the thickness D3 of the first seal portion 52 disposed inside the outermost seal portion 52E in the stacking direction.
  • the thickness D7 of the outermost seal portion 52E is, for example, 1.5 to 2.0 times the thickness D3 of the first seal portion 52 disposed inside the outermost seal portion 52E in the stacking direction.
  • the thickness D7 of the outermost seal portion 52E is, for example, 300 to 1000 ⁇ m.
  • the thickness D7 of the outermost seal portion 52E disposed at both ends of the stacked body 30 in the stacking direction is equal to that of the first seal portion 52 disposed between the outermost seal portions 52E in the stacking direction. Larger than thickness D3. Due to the protrusions 50E formed in this manner, it is possible to form a portion having higher rigidity than the other portions at both ends in the stacking direction of the stacked body 30. Further, the projecting portion 50E can be formed only by forming the thickness D7 of the outermost seal portion 52E of the first seal portion 52 larger than the thickness D3 of the other first seal portions 52. Therefore, the airtightness of the storage module 12E can be suppressed by a simple configuration.
  • the processing unit 60 may be formed by etching the electrode plate 34.
  • the electrode plate 34 may not have the surface treatment unit 60.
  • the electrode plate 34, the first seal portion 52, the resin member 56, or the resin member 56C may be bonded, for example, by an adhesive.
  • the electrical storage apparatus 10 provided with an electrical storage module gave and demonstrated the example of the nickel-hydrogen secondary battery
  • a lithium ion secondary battery may be sufficient.
  • the positive electrode active material is, for example, a composite oxide, lithium metal, sulfur or the like.
  • the negative electrode active material is, for example, graphite, highly oriented graphite, mesocarbon microbeads, carbon such as hard carbon or soft carbon, alkali metal such as lithium or sodium, metal compound, SiO x (0.5 ⁇ x ⁇ 1.5) Metal oxides, boron-added carbon, etc.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un module de stockage d'énergie comprenant : un stratifié qui a un groupe d'électrodes bipolaires et des électrodes de terminaison disposées aux deux extrémités dans une direction de stratification du groupe d'électrodes bipolaires, et dans lequel des premières parties de joint d'étanchéité, dont chacune a une forme de cadre et étant liée à une partie de bord périphérique d'une plaque d'électrode, sont disposées en contact mutuel dans la direction de stratification de telle sorte que les plaques d'électrode sont stratifiées à des intervalles constants; une saillie en forme de cadre qui fait saillie, dans la direction de stratification, à partir d'une partie de bord périphérique d'une seconde surface d'une électrode de terminaison; et une seconde partie de joint d'étanchéité qui entoure une surface latérale du stratifié et lie le premier joint d'étanchéité et la saillie d'un seul tenant. La saillie est formée par un élément en résine collé à la première partie de joint d'étanchéité. La somme de l'épaisseur de l'élément en résine et de l'épaisseur de la première partie de joint d'étanchéité à laquelle est collé l'élément en résine est supérieure à celle de la première partie de joint d'étanchéité.
PCT/JP2017/045803 2017-02-15 2017-12-20 Module de stockage d'énergie Ceased WO2018150723A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017026045A JP6946656B2 (ja) 2017-02-15 2017-02-15 蓄電モジュール
JP2017-026045 2017-02-15

Publications (1)

Publication Number Publication Date
WO2018150723A1 true WO2018150723A1 (fr) 2018-08-23

Family

ID=63169435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/045803 Ceased WO2018150723A1 (fr) 2017-02-15 2017-12-20 Module de stockage d'énergie

Country Status (2)

Country Link
JP (1) JP6946656B2 (fr)
WO (1) WO2018150723A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4224593A4 (fr) * 2020-09-30 2025-07-02 Furukawa Electric Co Ltd Batterie de stockage bipolaire

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6939258B2 (ja) * 2017-08-28 2021-09-22 株式会社豊田自動織機 蓄電モジュール
JP7067277B2 (ja) * 2018-06-01 2022-05-16 日産自動車株式会社 電池
JP7056472B2 (ja) * 2018-08-29 2022-04-19 株式会社豊田自動織機 蓄電モジュール
JP7042204B2 (ja) * 2018-12-05 2022-03-25 株式会社豊田自動織機 蓄電モジュール
JP7152963B2 (ja) * 2019-02-13 2022-10-13 株式会社豊田自動織機 蓄電モジュール及びその製造方法
JP7217173B2 (ja) * 2019-02-26 2023-02-02 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
JP7125914B2 (ja) * 2019-04-16 2022-08-25 株式会社豊田自動織機 蓄電モジュール及び蓄電モジュールの製造方法
JP7495532B2 (ja) * 2021-02-10 2024-06-04 古河電気工業株式会社 バイポーラ型蓄電池の製造方法
JP7683617B2 (ja) * 2023-02-07 2025-05-27 トヨタ自動車株式会社 電池および電池の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005251465A (ja) * 2004-03-02 2005-09-15 Nissan Motor Co Ltd バイポーラ電池
JP2005259379A (ja) * 2004-03-09 2005-09-22 Nissan Motor Co Ltd バイポーラ電池
JP2008177196A (ja) * 2007-01-16 2008-07-31 Matsushita Electric Ind Co Ltd 面実装用方形蓄電セル
JP2014032929A (ja) * 2012-08-06 2014-02-20 Sh Copper Products Corp 集電体用銅箔及びこれを用いたリチウムイオン二次電池用負極集電体

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005251465A (ja) * 2004-03-02 2005-09-15 Nissan Motor Co Ltd バイポーラ電池
JP2005259379A (ja) * 2004-03-09 2005-09-22 Nissan Motor Co Ltd バイポーラ電池
JP2008177196A (ja) * 2007-01-16 2008-07-31 Matsushita Electric Ind Co Ltd 面実装用方形蓄電セル
JP2014032929A (ja) * 2012-08-06 2014-02-20 Sh Copper Products Corp 集電体用銅箔及びこれを用いたリチウムイオン二次電池用負極集電体

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4224593A4 (fr) * 2020-09-30 2025-07-02 Furukawa Electric Co Ltd Batterie de stockage bipolaire

Also Published As

Publication number Publication date
JP2018133201A (ja) 2018-08-23
JP6946656B2 (ja) 2021-10-06

Similar Documents

Publication Publication Date Title
JP6946656B2 (ja) 蓄電モジュール
JP6586969B2 (ja) 蓄電モジュール
JP6897124B2 (ja) 蓄電モジュール
JP5541514B2 (ja) 積層型二次電池
JP6683084B2 (ja) 蓄電装置
CN110301061B (zh) 镍氢电池
WO2013031891A1 (fr) Batterie rechargeable à électrolyte non aqueux
WO2018123503A1 (fr) Module de stockage d'électricité, et procédé de fabrication de module de stockage d'électricité
JP2018106967A (ja) 蓄電装置及び蓄電装置の製造方法
JP6959514B2 (ja) 蓄電モジュール、蓄電モジュールの製造方法、及び、蓄電装置の製造方法
JP6988089B2 (ja) 蓄電モジュール及び蓄電モジュールの製造方法
CN112585799B (zh) 蓄电模块及蓄电模块的制造方法
JP7123717B2 (ja) 蓄電モジュール
JP6683089B2 (ja) 蓄電装置
JP2018073583A (ja) 蓄電装置
JP2020030985A (ja) 蓄電モジュール
WO2018150829A1 (fr) Dispositif de stockage d'énergie
JP7420566B2 (ja) 蓄電装置
JP7074614B2 (ja) 蓄電モジュール
JP7070279B2 (ja) 蓄電モジュール
JP7079695B2 (ja) 蓄電モジュール
JP6926509B2 (ja) 蓄電装置
JP2017004892A (ja) 蓄電素子、及び蓄電素子の製造方法
JP2019117757A (ja) 蓄電モジュール
JP2019079677A (ja) 蓄電モジュール

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17896878

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17896878

Country of ref document: EP

Kind code of ref document: A1