WO2024181468A1 - 蓄電装置 - Google Patents

蓄電装置 Download PDF

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Publication number
WO2024181468A1
WO2024181468A1 PCT/JP2024/007190 JP2024007190W WO2024181468A1 WO 2024181468 A1 WO2024181468 A1 WO 2024181468A1 JP 2024007190 W JP2024007190 W JP 2024007190W WO 2024181468 A1 WO2024181468 A1 WO 2024181468A1
Authority
WO
WIPO (PCT)
Prior art keywords
bent portion
bent
opening
positive electrode
storage device
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/JP2024/007190
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English (en)
French (fr)
Japanese (ja)
Inventor
嵩広 野上
雄大 加藤
真也 下司
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to CN202480012624.7A priority Critical patent/CN120752787A/zh
Priority to EP24763947.9A priority patent/EP4675775A1/en
Priority to JP2025503950A priority patent/JPWO2024181468A1/ja
Publication of WO2024181468A1 publication Critical patent/WO2024181468A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
    • 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
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • 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

Definitions

  • This disclosure relates to power storage devices such as secondary batteries.
  • the peripheral portion of the sealing member is crimped and fixed to the top of the exterior can, thereby sealing the contact area between the exterior can and the sealing member.
  • a circular groove recessed inward is formed around the top end of the outer can. Then, with the peripheral portion of the sealing material placed on top of this groove, the top end of the outer can is bent inward and crimped, so that the peripheral portion of the sealing material is sandwiched and fixed between the groove and the bent portion.
  • Patent Document 1 a notch is formed in advance in the upper end of the outer can, which prevents the inner tip from rippling when the upper end is bent inward.
  • the above-mentioned energy storage device improves sealing reliability.
  • the objective of this disclosure is to provide an energy storage device with excellent reliability.
  • the energy storage device includes an exterior can having an electrode body, a cylindrical portion, and an opening formed at one end of the cylindrical portion, housing the electrode body, and a sealing member closing the opening, the opening of the cylindrical portion has an inwardly recessed annular groove formed therein, the periphery of the opening has a bent portion bent inward, the periphery of the sealing member is sandwiched from both sides by the groove and the bent portion, and the thickness of the bent portion extending from the peripheral portion extending in the axial direction of the exterior can to the bent portion extending inward is thicker than at least a portion of the bent portion.
  • the disclosed power storage device improves reliability.
  • FIG. 1 is a cross-sectional view of a battery 1 which is an example of an electricity storage device according to an embodiment.
  • 3A and 3B are diagrams illustrating the wound state of the electrode body 10.
  • 2 is a vertical cross-sectional view of an example of a folded portion 210 at the top end of an outer can 20 folded inward.
  • FIG. 3A and 3B are diagrams illustrating a configuration of a bending portion 210.
  • “Overall composition” 1 is a cross-sectional view of a battery 1, which is an example of a power storage device according to an embodiment. Note that the power storage device also includes a capacitor.
  • the battery 1 includes an electrode body 10 and an exterior can 20 that houses the electrode body 10.
  • the exterior can 20 includes a cylindrical portion 21 and a bottom portion 22 that closes one end of the cylindrical portion 21. An opening is formed at the other end of the cylindrical portion 21, and the opening is closed with a sealing member 24.
  • the exterior can 20 also houses an electrolyte solution together with the electrode body 10.
  • the electrolyte solution may be an aqueous electrolyte solution, but in this embodiment, a non-aqueous electrolyte solution is used.
  • a solid electrolyte may be used instead of the electrolyte solution.
  • the solid electrolyte for example, a solid or gel-like polymer electrolyte, an inorganic solid electrolyte, or the like is used.
  • an annular groove 23 that protrudes radially inward of the battery (or outer can) is provided on the opening side of the tube portion 21.
  • a sealing member 24 is supported by the groove 23 and closes the opening of the outer can 20.
  • the sealing member 24 side of the battery 1 is referred to as the top
  • the bottom 22 side of the outer can 20 is referred to as the bottom.
  • the outer can used in the energy storage device of the present disclosure has openings at both ends in the height direction, and each of the pair of openings may be sealed with a sealing member.
  • the battery 1 further has a number of electrode leads that extend from various points of the electrode body 10 toward the sealing member 24 and directly connect the first electrode constituting the electrode body 10 to the current collector 26 of the sealing member 24.
  • an upper insulating plate 34 is disposed between the electrode body 10 and the sealing member 24.
  • the electrode body 10 is a wound type electrode body in which a first electrode and a second electrode are wound with a separator interposed therebetween, and in this embodiment, the first electrode is a positive electrode and the second electrode is a negative electrode, and the electrode lead is a positive electrode lead 19.
  • multiple positive electrode leads 19 are arranged at predetermined intervals in the longitudinal direction of the positive electrode, and extend upward from the top of the positive electrode.
  • the positive electrode lead 19 electrically connects the positive electrode to the metal parts of the sealing member 24.
  • the negative electrode is electrically connected to the outer can 20, for example, by contacting the protruding portion of its core with the outer can 20 via the negative electrode current collector plate. Therefore, the sealing member 24 functions as the positive electrode terminal, and the outer can 20 functions as the negative electrode terminal.
  • the upper insulating plate 34 prevents the positive electrode and the positive electrode lead 19 from touching the outer can 20, and also prevents the positive electrode lead 19 from touching the negative electrode of the electrode body 10.
  • the negative electrode may also be electrically connected to the bottom of the outer can via a lead.
  • FIG. 2 is a diagram illustrating the wound state of the electrode body 10.
  • the electrode body 10 includes a positive electrode 11, a negative electrode 12, and a separator 13 interposed between the positive electrode 11 and the negative electrode 12. All of these are long strips that are wound in a spiral shape and are alternately stacked in the radial direction of the electrode body 10.
  • the positive electrode 11 and the negative electrode 12 each have a mixture layer on their surface.
  • the mixture layer of the negative electrode 12 is formed to be one size larger than the mixture layer of the positive electrode 11 in order to prevent lithium precipitation. That is, the mixture layer of the negative electrode 12 is formed longer in the longitudinal direction and width direction (short direction) than the mixture layer of the positive electrode 11.
  • FIG. 1 is a diagram illustrating the wound state of the electrode body 10.
  • the electrode body 10 includes a positive electrode 11, a negative electrode 12, and a separator 13 interposed between the positive electrode 11 and the negative electrode 12. All of these are long strips that are wound in a spiral shape and are alternately stacked in the radial direction of
  • the inner starting end of the positive electrode 11 is located outside the starting end of the negative electrode 12, and only the negative electrode 12 and the separator 13 are wound in the center of the electrode body 10.
  • the separator 13 is formed with dimensions at least one size larger than the positive electrode 11, and two sheets are arranged to sandwich the positive electrode 11. As a result, when wound, the separator 13 is interposed between the positive electrode 11 and the negative electrode 12.
  • the positive electrode 11 has a strip-shaped positive electrode core and a positive electrode composite layer formed on at least one surface of the core.
  • the positive electrode core can be a foil of a metal that is stable in the potential range of the positive electrode, such as aluminum or an aluminum alloy, or a film with the metal disposed on the surface.
  • the positive electrode composite layer contains a positive electrode active material, a conductive agent such as acetylene black, and a binder such as polyvinylidene fluoride, and is preferably formed on both sides of the positive electrode core.
  • a lithium transition metal composite oxide is used as the positive electrode active material.
  • the positive electrode lead 19 is connected to the positive electrode, but is preferably directly joined to the positive electrode core by welding or the like.
  • the negative electrode 12 has a strip-shaped negative electrode core and a negative electrode composite layer formed on at least one surface of the core.
  • the negative electrode core can be made of a foil of a metal that is stable in the potential range of the negative electrode, such as copper or a copper alloy, or a film with the metal disposed on the surface.
  • the negative electrode composite layer contains a negative electrode active material and a binder such as styrene-butadiene rubber (SBR), and is preferably formed on both sides of the negative electrode core.
  • SBR styrene-butadiene rubber
  • graphite or a silicon-containing compound is used as the negative electrode active material.
  • a tongue-shaped negative electrode lead may be directly joined to the negative electrode core by welding or the like, and then joined to the current collector plate.
  • the non-aqueous electrolyte contained in the exterior can 20 includes a non-aqueous solvent and an electrolyte salt dissolved in the non-aqueous solvent.
  • the non-aqueous solvent include esters, ethers, nitriles, amides, and mixed solvents of two or more of these.
  • the non-aqueous solvent may contain a halogen-substituted product in which at least a portion of the hydrogen in these solvents is replaced with a halogen atom such as fluorine.
  • non-aqueous solvents include ethylene carbonate (EC), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), and mixed solvents of these.
  • a lithium salt such as LiPF6 is used as the electrolyte salt.
  • the outer can 20 is a cylindrical metal container with a bottom and an open upper end in the axial direction, and has a cylindrical tube portion 21 and a circular bottom portion 22 when viewed from the bottom.
  • the outer can 20 is generally made of a metal whose main component is iron, but may be made of a metal whose main component is aluminum or the like, particularly when the outer can 20 is electrically connected to the positive electrode.
  • the outer can 20 also has a groove portion 23 formed along the circumferential direction of the tube portion 21.
  • the groove portion 23 is formed in the vicinity of the opening of the outer can 20, at a position spaced a predetermined length downward from the edge of the opening (the upper end of the outer can 20).
  • the predetermined length is, for example, a length equivalent to 1 to 20% of the axial length of the outer can 20.
  • the bottom 22 of the exterior can 20 is provided with a safety valve mechanism that is activated when an abnormality occurs in the battery 1.
  • the bottom 22 is formed with, for example, a thin-walled portion. When an abnormality occurs in the battery 1 and the internal pressure rises, this thin-walled portion breaks preferentially, and a gas exhaust port is formed in the bottom 22.
  • the groove portion 23 is a portion of the tubular portion 21 that protrudes inwardly from the exterior can 20, and is formed, for example, by spinning the tubular portion 21 from the outside. At the position where the groove portion 23 is formed, the exterior can 20 is reduced in diameter, and a thin groove is formed on the outer circumferential surface of the tubular portion 21.
  • the groove portion 23 preferably has a generally U-shaped cross section and is formed in a ring shape over the entire circumferential length of the tubular portion 21.
  • the groove portion 23 may be formed by processing the tubular portion 21 after the electrode body 10 is placed inside the exterior can 20.
  • the inner diameter of the outer can 20 at the position where the groove 23 is formed is, for example, 80 to 99% of the maximum inner diameter of the outer can 20.
  • An example of the length of the groove 23 along the radial direction of the outer can 20 is 0.5 to 2.0 mm. Since the diameter of the electrode body 10 is approximately the same as the maximum inner diameter of the outer can 20, the electrode body 10 and the groove 23 overlap in the vertical direction of the battery 1.
  • the lower end of the positive electrode lead 19 is connected to the upper end of the positive electrode at multiple points, and the other end is connected to the cap 25 via the current collector 26.
  • the sealing member 24 includes, for example, a cap 25, a current collector plate 26, and an electrically insulating gasket 33, and is formed in a disk shape as a whole.
  • the sealing member 24 is placed on the groove 23 of the outer can 20 and is fixed to the opening of the outer can 20.
  • the upper end of the opening is bent inward and crimped to the sealing member 24 via the gasket 33 to form a bent portion.
  • the sealing member 24 is fixed to the upper end of the outer can 20 by the groove 23 and the bent portion of the outer can 20, and closes the opening of the outer can 20.
  • the bent portion is formed in a ring shape along the circumferential direction of the outer can 20, and holds the sealing member 24 together with the groove 23.
  • the sealing member 24 includes a member for covering the upper opening of the outer can 20, such as an upper insulating plate 34.
  • the sealing member 24 may also include a metal rupture plate or the like.
  • the cap 25 is a disk-shaped metal member that is exposed to the outside of the exterior can 20 and forms the top surface of the battery 1.
  • the cap 25 has a shape (raised portion) in which the radial center part protrudes outward from the battery 1.
  • Wiring material is connected to the cap 25 when the battery 1 is modularized to form a battery pack. For this reason, the cap 25 functions as an external terminal of the battery 1, and is also called an external terminal or top cover.
  • the positive electrode lead 19 is connected to the current collector 26, and the cap 25 functions as a positive electrode external terminal.
  • the current collector 26 is a metal member having a diameter similar to that of the cap 25, and is disposed closer to the electrode body 10 than the cap 25.
  • the current collector 26 has an opening 26a in the radial center and is formed in a ring shape.
  • the cap 25 and the current collector 26 are welded, and the current collector 26 is welded, for example, to a position closer to the outer periphery than the radial center of the cap 25.
  • the current collector 26 has a ring-shaped protrusion 26b, which will be described later, and the protrusion 26b becomes the welded part with the cap 25.
  • the positive electrode lead 19 connected to the positive electrode of the electrode body 10 is connected to the current collector 26, so that the current collector 26 functions as a positive electrode current collector. It is also possible to directly join the positive electrode lead to the cap without providing a positive electrode current collector.
  • the gasket 33 is provided so as to encase the outer periphery of the laminate of the cap 25 and the current collector plate 26.
  • the gasket 33 is an annular resin or rubber member that prevents contact between the cap 25 and the current collector plate 26 and the outer can 20, and ensures electrical insulation between the outer can 20 and the sealing member 24.
  • the gasket 33 covers the upper surface of the cap 25, the sides of the cap 25 and the current collector plate 26, and the lower surface of the current collector plate 26 on the outer periphery of the laminate.
  • the gasket 33 also seals the inside of the battery 1 by filling the gap between the outer can 20 and the sealing member 24.
  • the gasket 33 is formed to cover most of the lower surface of the current collector 26, and is interposed between the current collector 26 and the upper insulating plate 34.
  • An opening 33a is formed in the radial center of the gasket 33, which overlaps with the opening 26a of the current collector 26 in the vertical direction.
  • the gasket 33 may have a through hole 33b formed in a portion located below the current collector 26. It is expected that electrolyte will accumulate on the upper surface of the gasket 33, and by providing the through hole 33b, such electrolyte can be efficiently returned to the electrode body 10 side.
  • multiple through holes 33b are formed along the circumferential direction of the gasket 33.
  • the gasket 33 has an inner extension portion 33c that extends inward from the outer periphery of the cap 25.
  • the upper end of the exterior can 20 is bent (crimped) inwards to form a bent portion 210.
  • This bent portion 210 can be used as a negative external terminal.
  • Configuration of bending portion 210" 3 is a vertical (radial) cross-sectional view of an example of a bent portion 210 formed by bending the upper end of the exterior can 20 inward.
  • the bent portion 210 is formed by bending the upper end portion inward from a portion 211 extending in the axial direction (vertical direction) of the cylindrical portion 21.
  • This bent portion 210 is formed by spin crimping, as described below.
  • the bent portion 210 includes a bent portion 212 that bends inward, an intermediate portion 213 that extends inward from the bent portion 212, and a tip portion 214 that forms the inner end.
  • the tip portion 214 is thicker than the thin portion located radially outward from the tip portion.
  • the tip portion 214 protrudes toward the closure member in the height direction of the outer can from the thin portion.
  • the bent portion 212 and the tip portion 214 are thick portions.
  • the intermediate portion 213 has a thin portion 213-2 on the side closer to the tip portion 214, a thick portion 213-1 near the center of the intermediate portion 213, and a thin portion 213-3 on the side closer to the bent portion 212.
  • the tip of the bent portion 210 extends further inward on the sealing material side, forming an annular tapered slope. This shape allows the tip to be made thicker, making it easier to hold down (bite into) the inward extending portion 33c of the gasket 33.
  • the bent portion 210 has a thick tip portion 214 and a thin portion 213-2 near the inside thereof.
  • the pressing force against the gasket below it can be increased.
  • This increased pressing force increases the reaction force of the inner extension portion 33c of the gasket 33, and a reliable seal is obtained near the tip portion 214 of the inner extension portion 33c of the gasket 33.
  • the thin portion 213-2 is formed on the radial outside of the outer can of the tip portion 214, the upper surface of the bent portion 210 (the surface facing outward in the thickness direction of the bent portion) can be made flatter even if the radial dimension of the bent portion is longer.
  • the bent portion 210 has an inclined surface on the surface facing the gasket 33 in the radially inner region of the thin portion 213, which approaches the gasket in the radially inner direction, and this region becomes thicker as it moves inward.
  • the bent portion 210 may satisfy the requirement W5 ⁇ W6. Furthermore, the bent portion 210 may further satisfy the requirement W5 ⁇ W4. The bent portion may also satisfy the requirement W3 ⁇ W4, or may satisfy the requirement W3 ⁇ W2. It may also satisfy the requirement W1 ⁇ W2. Furthermore, if the tip portion 214 has a tapered inclined surface and the thickness in the diagonal direction is W7, then W6 ⁇ W7. It may also be W2>W4.
  • the tip portion 212 is located on the 0.5A-A side.
  • the region of 0.9A-A is the tip portion.
  • the thickness of the tip portion W6 or W7 may be increased by 120% or more relative to the minimum thickness W4 in the middle portion of the outer can 20, particularly in the range of 0.5A-0.9A from the outer diameter.
  • the bent portion 212 is thicker than the surrounding area. By making the bent portion 212 thicker, the mechanical strength of the bent portion 212 can be improved. This prevents the occurrence of penetrating cracks or inhibits penetrating cracks from reaching the inside, thereby preventing the intrusion of moisture and electrolyte leakage.
  • the thickness of the bent portion 210 changes in the radial direction.
  • a thickness can be formed by a crimping device.
  • the crimping device performs crimping while rotating the body portion by a motor, which is called spin crimping.
  • a motor is fixed to the base of the crimping device, and its rotating shaft extends vertically.
  • a body is fixed to the lower end of the rotating shaft, and the body rotates within a horizontal plane.
  • wheels are rotatably supported on a horizontally extending shaft.
  • the stand can move up and down, and the crimping device moves up and down as a whole.
  • the shaft may extend in a direction other than horizontal.
  • This crimping device is positioned above the outer can 20, and the motor is rotated to rotate the body.
  • the wheels come into contact with the upper end of the periphery of the outer can 20.
  • the wheels which function as a crimping die, are rotatable, and move above the upper end of the outer can 20 while passively rotating. Then, when the crimping device is further lowered in this state, the upper end of the tubular portion 21 is gradually bent inward.
  • a notch is formed in the outer peripheral surface of the wheel, which is the contact surface with the tubular portion.
  • the inner surface of the notch is in line contact with the tubular portion.
  • the inner surface of the notch has a first surface that faces the upper end of the tubular portion 21 in the height direction of the outer can, a second surface that runs radially opposite the outer peripheral surface of the tubular portion, and a curved R portion at the corner where one end of the first surface and one end of the second surface are connected.
  • the tip portion is thickened at the beginning of the crimping where the tip portion contacts the notch of the wheel.
  • the R portion that contacts the tip portion is represented by an arc of a circle with a radius of 3 mm or less in a cross section obtained by cutting the wheel in the radial direction. It may also be an arc of a circle with a radius of 2.5 mm or less, or may even be an arc of a circle with a radius of 2.0 mm or less.
  • the thickness of the intermediate bent portion increases. At this time, the bent portion can be made thicker by the diameter of the R portion of the cutout of the wheel.
  • Length of the bent part 4 shows an example of the configuration of the bent portion 210.
  • the bent portion 210 is relatively short.
  • the bent portion 212 is thicker than the other portions. With this configuration, it is possible to suppress the occurrence of a penetrating crack in the bent portion or to suppress the penetrating crack from reaching the inside of the tube portion.
  • the thickness of the bent portion is increased during crimping to prevent cracks from occurring, and the distance over which the cracks advance is increased to prevent the cracks from penetrating through.
  • REFERENCE SIGNS LIST 1 battery 10 electrode body, 11 positive electrode, 12 negative electrode, 13 separator, 19 positive electrode lead, 20 outer can, 21 cylindrical portion, 22 bottom portion, 23 groove portion, 24 sealing material, 25 cap, 26 current collector plate, 26a opening, 26b protruding portion, 33 gasket, 34 upper insulating plate, 210 folded portion, 211 portion, 212 bent portion, 213 middle portion, 213-1 thick portion, 213-2: thin portion, 213-3: thin portion, 214 tip portion.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
PCT/JP2024/007190 2023-02-28 2024-02-28 蓄電装置 Ceased WO2024181468A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202480012624.7A CN120752787A (zh) 2023-02-28 2024-02-28 蓄电装置
EP24763947.9A EP4675775A1 (en) 2023-02-28 2024-02-28 Power storage device
JP2025503950A JPWO2024181468A1 (https=) 2023-02-28 2024-02-28

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-030473 2023-02-28
JP2023030473 2023-02-28

Publications (1)

Publication Number Publication Date
WO2024181468A1 true WO2024181468A1 (ja) 2024-09-06

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PCT/JP2024/007190 Ceased WO2024181468A1 (ja) 2023-02-28 2024-02-28 蓄電装置

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EP (1) EP4675775A1 (https=)
JP (1) JPWO2024181468A1 (https=)
CN (1) CN120752787A (https=)
WO (1) WO2024181468A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006261083A (ja) 2004-09-14 2006-09-28 Matsushita Electric Ind Co Ltd 電池間接続装置
JP2007234305A (ja) * 2006-02-28 2007-09-13 Sanyo Electric Co Ltd 円筒形電池
JP2010282824A (ja) * 2009-06-04 2010-12-16 Hitachi Vehicle Energy Ltd 密閉型電池
US20180097215A1 (en) * 2016-09-30 2018-04-05 Lg Chem, Ltd. Cylindrical Battery Cell Comprising Metal Can Having Groove
WO2020241610A1 (ja) * 2019-05-31 2020-12-03 三洋電機株式会社 円筒形電池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006261083A (ja) 2004-09-14 2006-09-28 Matsushita Electric Ind Co Ltd 電池間接続装置
JP2007234305A (ja) * 2006-02-28 2007-09-13 Sanyo Electric Co Ltd 円筒形電池
JP2010282824A (ja) * 2009-06-04 2010-12-16 Hitachi Vehicle Energy Ltd 密閉型電池
US20180097215A1 (en) * 2016-09-30 2018-04-05 Lg Chem, Ltd. Cylindrical Battery Cell Comprising Metal Can Having Groove
WO2020241610A1 (ja) * 2019-05-31 2020-12-03 三洋電機株式会社 円筒形電池

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JPWO2024181468A1 (https=) 2024-09-06
EP4675775A1 (en) 2026-01-07
CN120752787A (zh) 2025-10-03

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