WO2024116923A1 - 円筒形電池 - Google Patents

円筒形電池 Download PDF

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Publication number
WO2024116923A1
WO2024116923A1 PCT/JP2023/041567 JP2023041567W WO2024116923A1 WO 2024116923 A1 WO2024116923 A1 WO 2024116923A1 JP 2023041567 W JP2023041567 W JP 2023041567W WO 2024116923 A1 WO2024116923 A1 WO 2024116923A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating plate
cylindrical battery
negative electrode
sealing body
easily breakable
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/JP2023/041567
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
曉 高野
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 Energy Co Ltd
Original Assignee
Panasonic Energy 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 Energy Co Ltd filed Critical Panasonic Energy Co Ltd
Priority to CN202380080970.4A priority Critical patent/CN120226200A/zh
Priority to JP2024561382A priority patent/JPWO2024116923A1/ja
Publication of WO2024116923A1 publication Critical patent/WO2024116923A1/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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates

Definitions

  • This disclosure relates to cylindrical batteries.
  • Patent Document 1 A conventional cylindrical battery is described in Patent Document 1.
  • This cylindrical battery includes an electrode body, a bottomed cylindrical outer can that houses the electrode body, a sealing body that closes the opening of the outer can, and an insulating plate arranged between the electrode body and the sealing body in the axial direction.
  • the sealing body includes a safety valve that breaks when the battery generates abnormal heat and the pressure inside the battery increases, thereby venting gas inside the battery to the outside.
  • the insulating plate has a through hole, and the positive electrode lead extending from the electrode body passes through the through hole and is then joined to the underside of the sealing body. The insulating plate prevents the positive electrode and negative electrode from shorting out.
  • the cylindrical battery disclosed herein aims to provide a cylindrical battery that can easily secure an exhaust path for gas inside the battery when the battery generates abnormal heat, thereby improving safety.
  • the cylindrical battery disclosed herein comprises an electrode assembly in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, a bottomed cylindrical outer can that houses the electrode assembly, a sealing body that closes the opening of the outer can, and an insulating plate that is arranged between the sealing body and the electrode assembly in the axial direction, the sealing body including a safety valve, and the insulating plate having an easily breakable portion.
  • the cylindrical battery disclosed herein makes it easier to ensure an exhaust path for gas inside the battery in the event of abnormal heat generation, improving safety.
  • FIG. 2 is an axial cross-sectional view of a cylindrical battery according to one embodiment of the present disclosure.
  • FIG. FIG. 2 is an enlarged cross-sectional view of the periphery of the sealing body of FIG. 1 .
  • FIG. 2 is a schematic perspective view of an insulating plate as viewed obliquely from above.
  • FIG. 5 is a schematic perspective view of an insulating plate according to a first modified example, the perspective view corresponding to FIG. 4 .
  • FIG. 5 is a schematic perspective view of an insulating plate according to a second modified example, the perspective view corresponding to FIG. 4 .
  • the cylindrical battery according to the present disclosure may be a primary battery or a secondary battery. It may also be a battery using an aqueous electrolyte or a battery using a non-aqueous electrolyte.
  • a non-aqueous electrolyte secondary battery (lithium ion battery) using a non-aqueous electrolyte will be exemplified as a cylindrical battery 10 according to one embodiment, but the cylindrical battery according to the present disclosure is not limited thereto.
  • FIG. 1 is an axial cross-sectional view of a cylindrical battery 10 according to one embodiment of the present disclosure.
  • the cylindrical battery 10 comprises a wound electrode body 14, a non-aqueous electrolyte (not shown), a bottomed cylindrical outer can 16 that contains the electrode body 14 and the non-aqueous electrolyte, and a sealing body 17 that closes the opening of the outer can 16.
  • the electrode body 14 has a positive electrode 11, a negative electrode 12, and a separator 13 interposed between the positive electrode 11 and the negative electrode 12.
  • the cylindrical battery 10 further comprises a resin gasket 28 disposed between the outer can 16 and the sealing body 17.
  • the non-aqueous electrolyte includes a non-aqueous solvent and an electrolyte salt dissolved in the non-aqueous solvent.
  • an electrolyte salt dissolved in the non-aqueous solvent.
  • esters, ethers, nitriles, amides, and mixed solvents of two or more of these may be used as the non-aqueous solvent.
  • the non-aqueous solvent may contain a halogen-substituted body in which at least a part of the hydrogen atoms of these solvents is replaced with a halogen atom such as fluorine.
  • the non-aqueous electrolyte is not limited to a liquid electrolyte, and may be a solid electrolyte using a gel polymer or the like.
  • a lithium salt such as LiPF6 is used as the electrolyte salt.
  • FIG. 2 is a perspective view of the electrode body 14.
  • the electrode body 14 has a long positive electrode 11, a long negative electrode 12, and two long separators 13, and has a wound structure in which the positive electrode 11 and the negative electrode 12 are wound with the separator 13 interposed therebetween.
  • a positive electrode lead 20 is joined to the positive electrode 11, and a negative electrode lead 21 is joined to the negative electrode 12.
  • the negative electrode 12 is formed to be slightly larger than the positive electrode 11 in order to suppress lithium precipitation, and is formed to be longer in the longitudinal direction and width direction (short direction) than the positive electrode 11.
  • the two separators 13 are formed to be at least slightly larger than the positive electrode 11, and are arranged to sandwich the positive electrode 11, for example.
  • the positive electrode 11 has a positive electrode current collector and a positive electrode mixture layer formed on both sides of the positive electrode current collector.
  • the positive electrode current collector can be a metal foil that is stable in the potential range of the positive electrode 11, such as aluminum or an aluminum alloy, or a film with the metal disposed on the surface.
  • the positive electrode mixture layer contains a positive electrode active material, a conductive agent, and a binder.
  • the positive electrode 11 can be produced, for example, by applying a positive electrode mixture slurry containing a positive electrode active material, a conductive agent, and a binder onto the positive electrode current collector, drying the coating, and then compressing it to form a positive electrode mixture layer on both sides of the positive electrode current collector.
  • the positive electrode active material is composed mainly of a lithium-containing metal composite oxide.
  • Metal elements contained in the lithium-containing metal composite oxide include Ni, Co, Mn, Al, B, Mg, Ti, V, Cr, Fe, Cu, Zn, Ga, Sr, Zr, Nb, In, Sn, Ta, and W.
  • An example of a preferred lithium-containing metal composite oxide is a composite oxide containing at least one of Ni, Co, Mn, and Al.
  • Examples of the conductive agent contained in the positive electrode mixture layer include carbon materials such as carbon black, acetylene black, ketjen black, and graphite.
  • Examples of the binder contained in the positive electrode mixture layer include fluororesins such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVdF), polyacrylonitrile (PAN), polyimide resins, acrylic resins, and polyolefin resins. These resins may be used in combination with cellulose derivatives such as carboxymethylcellulose (CMC) or its salts, and polyethylene oxide (PEO).
  • CMC carboxymethylcellulose
  • PEO polyethylene oxide
  • the negative electrode 12 has a negative electrode current collector and a negative electrode mixture layer formed on both sides of the negative electrode current collector.
  • a metal foil that is stable in the potential range of the negative electrode 12 such as copper or a copper alloy, or a film with the metal disposed on the surface layer can be used.
  • the negative electrode mixture layer contains a negative electrode active material and a binder.
  • the negative electrode 12 can be produced, for example, by applying a negative electrode mixture slurry containing a negative electrode active material and a binder, etc., onto the negative electrode current collector, drying the coating, and then compressing it to form a negative electrode mixture layer on both sides of the negative electrode current collector.
  • a carbon material that reversibly absorbs and releases lithium ions is generally used as the negative electrode active material.
  • Preferred carbon materials are graphites such as natural graphites such as flake graphite, lump graphite, and earthy graphite, and artificial graphites such as lump artificial graphite and graphitized mesophase carbon microbeads.
  • the negative electrode mixture layer may contain a silicon (Si) material as the negative electrode active material.
  • Si silicon
  • metals other than Si that are alloyed with lithium, alloys containing such metals, compounds containing such metals, etc. may be used as the negative electrode active material.
  • the binder contained in the negative electrode mixture layer may be fluororesin, PAN, polyimide resin, acrylic resin, polyolefin resin, etc., but styrene-butadiene rubber (SBR) or a modified form thereof is preferably used.
  • the negative electrode mixture layer may contain, for example, in addition to SBR, CMC or a salt thereof, polyacrylic acid (PAA) or a salt thereof, polyvinyl alcohol, etc.
  • a porous sheet having ion permeability and insulating properties is used.
  • the porous sheet include a microporous thin film, a woven fabric, and a nonwoven fabric.
  • a polyolefin resin such as polyethylene or polypropylene, or cellulose, etc. is preferable.
  • the separator 13 may have either a single layer structure or a laminated structure. A heat-resistant layer or the like may be formed on the surface of the separator 13.
  • the positive electrode lead 20 is electrically connected to an intermediate portion such as the center portion in the winding direction of the positive electrode core, and the negative electrode lead 21 is electrically connected to the end of the winding direction of the negative electrode core.
  • the negative electrode lead may be electrically connected to the start of the winding direction of the negative electrode core.
  • the electrode body may have two negative electrode leads, one of which is electrically connected to the start of the winding direction of the negative electrode core, and the other negative electrode lead is electrically connected to the end of the winding direction of the negative electrode core.
  • the negative electrode lead may be electrically connected to the start of the winding direction of the negative electrode core, and the end of the winding direction of the negative electrode core may be abutted against the inner surface of the outer can.
  • the negative electrode lead may not exist, and the end of the winding direction of the negative electrode core may be abutted against the inner surface of the outer can to electrically connect the negative electrode and the outer can.
  • the cylindrical battery 10 further includes an insulating plate 18 arranged on the upper side of the electrode body 14 and an insulating plate 19 arranged on the lower side of the electrode body 14.
  • the insulating plates 18, 19 are made of an insulating material, for example, resin.
  • the positive electrode lead 20 attached to the positive electrode 11 extends to the sealing body 17 side through the through hole of the insulating plate 18, and the negative electrode lead 21 attached to the negative electrode 12 extends to the bottom 68 side of the outer can 16 through the outside of the insulating plate 19.
  • the positive electrode lead 20 is joined by welding or the like to the lower surface of the terminal plate 23, which is the bottom plate of the sealing body 17, and the sealing plate 27, which is the top plate of the sealing body 17 and is electrically connected to the terminal plate 23, serves as the positive electrode terminal.
  • the negative electrode lead 21 is connected by welding or the like to the inner surface of the bottom 68 of the outer can 16, and the outer can 16 serves as the negative electrode terminal.
  • the outer can 16 is a cylindrical metal container with a bottom, and has a cylindrical portion 30 and a bottom 68.
  • the space between the outer can 16 and the sealing body 17 is sealed with an annular gasket 28, thereby sealing the internal space of the cylindrical battery 10.
  • the gasket 28 is sandwiched between the outer can 16 and the sealing body 17, and insulates the sealing body 17 from the outer can 16.
  • the gasket 28 acts as a sealing material to maintain airtightness inside the battery, and as an insulating material to prevent short circuits between the outer can 16 and the sealing body 17.
  • the outer can 16 has an annular grooved portion 35 in part of the axial direction of the cylindrical portion 30.
  • the grooved portion 35 can be formed, for example, by spinning a part of the cylindrical portion 30 radially inward to recess it radially inward.
  • the cylindrical portion 30 has the grooved portion 35 and an annular shoulder portion 33.
  • the shoulder portion 33 is bent radially inward from the end of the opening side of the cylindrical portion 30 and extends inward.
  • the shoulder portion 33 is formed when the upper end of the outer can 16 is bent inward and crimped to the peripheral portion 31 of the sealing body 17.
  • the sealing body 17 is clamped between the shoulder portion 33 and the grooved portion 35 via the gasket 28 by this crimping, and is fixed to the outer can 16.
  • FIG. 3 is an enlarged cross-sectional view of the sealing body periphery of the cylindrical battery 10.
  • the sealing body 17 has a structure in which, from the electrode body 14 side, a terminal plate 23, an annular insulating plate 25, and a sealing plate 27 are stacked.
  • Each member constituting the sealing body 17 has a disk or ring shape, and each member except for the insulating plate 25 is electrically connected.
  • the terminal plate 23 constitutes the bottom plate of the sealing body 17.
  • the terminal plate 23 has an annular thick portion 23a located on the radially outer side, and a disk-shaped thin portion 23b that is connected to the annular end on the radially inner side of the thick portion 23a and is thinner than the thick portion 23a.
  • the positive electrode lead 20 is connected to the underside of the thick portion 23a of the terminal plate 23 by welding or the like.
  • the sealing plate 27 is circular in plan view and has a central portion 27a, an outer periphery 27b, and an inclined portion 27c that connects the central portion 27a and the outer periphery 27b.
  • the upper surface of the thin portion 23b of the terminal plate 23 and the lower surface of the central portion 27a of the sealing plate 27 are joined by metallurgical joining, for example, laser welding.
  • the thickness of the inclined portion 27c is thinner than that of the central portion 27a.
  • the annular upper surface of the inclined portion 27c is an inclined surface that is positioned higher as it moves radially outward, and the annular lower surface of the inclined portion 27c is also an inclined surface that is positioned higher as it moves radially outward. The thickness of the inclined portion 27c decreases as it moves radially outward.
  • the insulating plate 25 is fixed, for example, by being press-fitted into the inner peripheral surface of the outer peripheral portion 27b.
  • the insulating plate 25 has an annular protrusion 25a that is bent axially downward on the radial outer peripheral side, and the thick portion 23a of the terminal plate 23 is fixed, for example, by being press-fitted into the inner peripheral surface of the annular protrusion 25a.
  • the insulating plate 25 is made of an insulating resin or the like, and prevents the thick portion 23a of the terminal plate 23 from being electrically connected to the sealing plate 27.
  • the insulating plate 25 has one or more ventilation holes 25b that penetrate in the axial direction at a location that axially overlaps with the inclined portion 27c of the sealing plate 27, and the terminal plate 23 has one or more ventilation holes 23c that penetrate in the axial direction at a location that axially overlaps with the inclined portion 27c and communicates with the ventilation hole 25b.
  • FIG 4 is a schematic perspective view of the insulating plate 18 when viewed from diagonally above.
  • the insulating plate 18 has an easily breakable portion 41 formed by a cut that does not penetrate the insulating plate 18 in the thickness direction.
  • the easily breakable portion 41 includes a concentric extension portion 41a located approximately concentric with the inner circumference of the outer can 16.
  • the concentric extension portion 41a has a C-shape in a plan view when the insulating plate 18 is viewed from the axial direction, and both ends of the concentric extension portion 41a are connected to a through hole 45 in the insulating plate 18 through which the positive electrode lead 20 passes.
  • the insulating plate 18 also has a through hole 46 in the center. This through hole 46 is provided for the purpose of allowing the electrolyte to flow smoothly toward the electrode body 14 during injection, but the insulating plate does not need to have a through hole in the center.
  • the cylindrical battery 10 if the cylindrical battery 10 generates abnormal heat and the internal pressure of the cylindrical battery 10 reaches a predetermined value, the following current interruption and gas release operations are performed.
  • the central portion 27a and inclined portion 27c of the sealing plate 27 are inverted axially upward, with the annular end portion 39 on the radially outer side, which has low rigidity, as a fulcrum in the inclined portion 27c.
  • the thin portion 23b of the terminal plate 23 or the welded portion between the terminal plate 23 and the sealing plate 27 breaks, and the sealing plate 27 is separated from the terminal plate 23. This operation interrupts the current path between the terminal plate 23 and the sealing plate 27.
  • the sealing plate 27 forms a safety valve.
  • the sealing plate 27 that forms the safety valve is provided at the upper end of the sealing body 17, but a terminal cap with a ventilation hole may be placed on the top of the sealing plate 27.
  • the through holes 45, 46 of the insulating plate 18 become clogged, and a sufficient exhaust path cannot be secured from the electrode body 14 to the sealing body 17.
  • the through holes 45, 46 of the insulating plate 18 become clogged, the easily breakable portion 41 of the insulating plate 18 breaks, and the breakage forms a sufficient exhaust path from the electrode body 14 to the sealing body 17.
  • the cylindrical battery 10 of the present disclosure even if the through holes 45, 46 of the insulating plate 18 become clogged, the internal pressure of the space on the electrode body 14 side of the insulating plate 18 in the outer can 16 is prevented from becoming excessively high. Therefore, it is possible to reliably prevent the side walls of the outer can 16 other than the safety valve from breaking, and a high level of safety can be achieved when the cylindrical battery 10 is abnormally heated.
  • the concentric extension portion 41a has a C-shape in plan view when the insulating plate 18 is viewed in the axial direction. This makes it easier to ensure an exhaust path.
  • the area of the insulating plate 18 is 20% to 95% of the inner diameter area surrounded by the inner circumference 48 of the portion of the outer can 16 that radially faces the upper end face of the electrode body 14.
  • the area of the insulating plate 18 is the area of the portion of the insulating plate 18 surrounded by the outer periphery of the insulating plate 18 excluding the through holes 45, 46.
  • the easily breakable portion 41 of the insulating plate 18 only needs to break before any portion of the cylindrical battery 10 other than the safety valve breaks, and the operating pressure at which the easily breakable portion 41 breaks can be adjusted based on the depth of the cut made in the insulating plate 18.
  • the depth of the cut is preferably 15% to 90% of the thickness of the insulating plate 18, and more preferably 20% to 80% of the thickness of the insulating plate 18.
  • the easily breakable portion 41 includes a concentric extension portion 41a that is positioned approximately concentrically with the inner circumference of the outer can 16 in a plan view of the insulating plate 18 viewed from the axial direction, and the insulating plate 18 is broken along the concentric extension portion 41a.
  • the easily breakable portion provided in the insulating plate may have any structure as long as it is capable of securing an exhaust path by breaking the easily breakable portion.
  • the easily breakable portion 141 may include a plurality of radially extending portions 141a extending radially from a central position located approximately at the radial center of the outer can 16. By forming the easily breakable portion 141 in this manner, the insulating plate 118 can be broken radially.
  • the easily breakable portion 241 may be configured by combining the above-mentioned concentric circular extension portion 41a and the above-mentioned radial extension portion 141a.
  • the easily breakable portion provided on the insulating plate may include a closed curve portion, for example, a circular closed curve portion formed to surround a through hole through which the lead passes, or may include the circular closed curve portion and a straight line portion extending along a diameter that communicates with the circular closed curve portion at two points.
  • the easily breakable portions 41, 141, and 241 are formed by notches.
  • the easily breakable portions 41, 141, and 241 may be formed by grooves instead of notches in the insulating plate.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
PCT/JP2023/041567 2022-11-30 2023-11-20 円筒形電池 Ceased WO2024116923A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202380080970.4A CN120226200A (zh) 2022-11-30 2023-11-20 圆筒形电池
JP2024561382A JPWO2024116923A1 (https=) 2022-11-30 2023-11-20

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-191398 2022-11-30
JP2022191398 2022-11-30

Publications (1)

Publication Number Publication Date
WO2024116923A1 true WO2024116923A1 (ja) 2024-06-06

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PCT/JP2023/041567 Ceased WO2024116923A1 (ja) 2022-11-30 2023-11-20 円筒形電池

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CN (1) CN120226200A (https=)
WO (1) WO2024116923A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004362870A (ja) * 2003-06-03 2004-12-24 Matsushita Electric Ind Co Ltd 円筒形電池
WO2011067931A1 (ja) * 2009-12-04 2011-06-09 パナソニック株式会社 密閉型二次電池
WO2022202270A1 (ja) * 2021-03-24 2022-09-29 三洋電機株式会社 円筒形電池
WO2022202293A1 (ja) * 2021-03-24 2022-09-29 三洋電機株式会社 円筒形電池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004362870A (ja) * 2003-06-03 2004-12-24 Matsushita Electric Ind Co Ltd 円筒形電池
WO2011067931A1 (ja) * 2009-12-04 2011-06-09 パナソニック株式会社 密閉型二次電池
WO2022202270A1 (ja) * 2021-03-24 2022-09-29 三洋電機株式会社 円筒形電池
WO2022202293A1 (ja) * 2021-03-24 2022-09-29 三洋電機株式会社 円筒形電池

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JPWO2024116923A1 (https=) 2024-06-06

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