WO2021124995A1 - 円筒形電池 - Google Patents

円筒形電池 Download PDF

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Publication number
WO2021124995A1
WO2021124995A1 PCT/JP2020/045746 JP2020045746W WO2021124995A1 WO 2021124995 A1 WO2021124995 A1 WO 2021124995A1 JP 2020045746 W JP2020045746 W JP 2020045746W WO 2021124995 A1 WO2021124995 A1 WO 2021124995A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylindrical battery
battery
metal
easily broken
end plate
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/JP2020/045746
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
恵輔 山下
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to EP20901542.9A priority Critical patent/EP4080670A4/en
Priority to JP2021565504A priority patent/JP7686570B2/ja
Priority to US17/785,267 priority patent/US12347878B2/en
Priority to CN202080087126.0A priority patent/CN114868305B/zh
Publication of WO2021124995A1 publication Critical patent/WO2021124995A1/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
    • H01M50/183—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
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • 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 a cylindrical battery.
  • Patent Document 1 describes a cylindrical battery in which a current cutoff mechanism is incorporated in a sealing body that seals one end of an outer can in order to ensure safety.
  • This current cutoff mechanism is configured by combining a metal valve body, an insulating member, and a metal body having ventilation holes. The central portions of the valve body and the metal body are connected to each other, and an insulating member is interposed between the outer peripheral portions thereof.
  • the sealing body includes three parts, a valve body, an insulating member, and a metal body, in order to give the sealing body that closes one end of the outer can a current blocking function.
  • These parts are required to operate reliably in the event of an abnormality in the battery, and it is indispensable that these parts have a complicated and highly accurate processed shape.
  • increasing the number of components of the sealing body as in the configuration described in Patent Document 1 imposes a heavy burden such as an increase in man-hours in processing, so that the number of components of the sealing body can be reduced. desired.
  • An object of the present disclosure is to provide a cylindrical battery capable of reducing the number of components of the sealing body by providing a current blocking function to the metal parts constituting the sealing body that closes one end of the outer can.
  • the cylindrical battery according to the present disclosure includes a bottomed tubular outer can, a sealing body that closes one end of the outer can, an electrode body arranged inside the outer can, and insulation arranged between the outer can and the sealing body.
  • the sealing body has a metal part electrically connected to the electrode lead derived from the electrode body, and the metal part is radially inside the connection portion between the metal part and the electrode lead.
  • a cylindrical battery that has an easily broken part and is crimped and fixed by an outer can via a resin part, and the resin part is crimped and fixed by the metal part inside the metal part in the radial direction from the easily broken part. is there.
  • the metal parts constituting the sealing body can have a current cutoff function, the number of components of the sealing body can be reduced.
  • FIG. 1 is a cross-sectional view of a cylindrical battery of an example of an embodiment.
  • FIG. 2 is a diagram corresponding to part A of FIG. 1, which shows a state in which the internal pressure of the battery rises from the state of FIG. 1 and the current cutoff mechanism is activated.
  • FIG. 3 is a diagram corresponding to part A of FIG. 1, which shows a state in which the battery internal pressure is further increased from the state of FIG. 2 and the gas discharge mechanism is operated.
  • FIG. 4 is a cross-sectional view of a cylindrical battery of a comparative example.
  • FIG. 1 is a cross-sectional view of the cylindrical battery 10 of the embodiment.
  • a non-aqueous electrolyte secondary battery such as a lithium ion battery is used.
  • the cylindrical battery 10 is configured by accommodating an electrode body 20 and a non-aqueous electrolyte (not shown) inside a bottomed tubular outer can 100 which is substantially cylindrical.
  • the sealing body 11 is fixed to the opening at one end (upper end of FIG. 1) of the outer can 100 via an insulating resin component 18. As a result, the opening at one end of the outer can 100 is closed by the sealing body 11 via the resin component 18.
  • the resin component 18 is an insulating member and has a function as a gasket for sealing between the outer can 100 and the sealing body 11, but also has a function of discharging gas when the internal pressure of the battery rises as described later.
  • the non-aqueous electrolyte contains a non-aqueous solvent and an electrolyte salt dissolved in the non-aqueous solvent.
  • the non-aqueous electrolyte is not limited to the liquid electrolyte, and may be a solid electrolyte using a gel polymer or the like.
  • the electrode body 20 is a winding type, has a positive electrode plate 21, a negative electrode plate 22, and a separator 23, and the positive electrode plate 21 and the negative electrode plate 22 are spirally wound via the separator 23.
  • one side of the electrode body 20 in the winding axis direction may be referred to as “upper”, and the other side in the winding axis direction may be referred to as “lower”.
  • the sealing body 11 is composed of only the metal parts 12.
  • the metal component 12 has a function as a positive electrode terminal and a function as a current cutoff mechanism that cuts off the current path when the internal pressure of the battery rises.
  • the metal parts 12 include a disk-shaped outer end plate portion 13 arranged at the outer end of the battery, a disk-shaped inner end plate portion 15 arranged at the inner end of the battery, an outer end plate portion 13, and the outer end plate portion 13. It has a disk-shaped connecting portion 17 that connects the inner end plate portions 15.
  • the outer diameter of the outer end plate portion 13 is smaller than the outer diameter of the inner end plate portion 15.
  • the outer diameter of the connecting portion 17 is smaller than the outer diameter of the outer end plate portion 13 and the inner end plate portion 15.
  • the outer end plate portion 13, the inner end plate portion 15, and the connecting portion 17 have a coaxial shape in which the central axes coincide with each other.
  • a circular groove portion 12a is formed between the outer end plate portion 13 and the inner end plate portion 15, and the inner end plate portion 15 has a flange portion 15a radially outward from the connecting portion 17. Is formed.
  • the metal part 12 can be made of, for example, aluminum or an aluminum alloy.
  • an external lead (not shown) for electrically connecting to another cylindrical battery in the battery module (not shown). are joined by welding.
  • the end portion of the positive electrode lead 21a led out from the electrode body 20 is connected to the inner side surface of a part of the flange portion 15a in the radial direction.
  • the positive electrode lead 21a corresponds to an electrode lead.
  • the flange portion 15a has an easily broken portion 16 inward in the radial direction from the connecting portion G between the metal component 12 and the positive electrode lead 21a.
  • the easily broken portion 16 is an annular thin-walled portion formed in a radial portion of the flange portion 15a, and an annular groove 15b is formed in a radial portion of the inner side surface (lower surface of FIG. 1) of the flange portion 15a. By being formed, the easily broken portion 16 is formed.
  • the easily broken portion 16 can also be formed on the outer surface (upper side surface of FIG. 1) of the flange portion 15a.
  • the resin component 18 is arranged between the inner peripheral surface of the opening formed at one end (upper end of FIG. 1) of the outer can 100 and the outer peripheral surface of the sealing body 11.
  • the resin component 18 has a substantially J-shape in which the outer end portion (upper end portion in FIG. 1) of the battery is longer than the inner end portion (lower end portion in FIG. 1) of the battery in a part in the circumferential direction. It is formed in a ring shape.
  • the flange portion 15a of the inner end plate portion 15 is caulked and fixed by the outer can 100 via the resin component 18.
  • the resin component 18 is held in a compressed state between one end of the outer can 100 and the outer peripheral surface of the sealing body 11, and is caulked and fixed by the metal component 12 inside the metal component 12 in the radial direction from the easily broken portion 16.
  • the tip end portion of the resin component 18 extending from between the flange portion 15a and one end of the outer can 100 is caulked and fixed by the outer end plate portion 13 and the inner end plate portion 15.
  • the resin component 18 a material that can ensure insulation and does not affect the battery characteristics can be used.
  • a polymer resin is preferable, and polypropylene (PP) resin and polybutylene terephthalate (PBT) resin are exemplified.
  • the airtightness inside the battery is ensured even after the easily broken portion 16 is broken due to the increase in the internal pressure of the battery.
  • the resin component 18 is deformed to the outside of the battery, and the portion including the outer end plate portion 13 is separated from the metal component 12 along the easily broken portion 16.
  • the current cutoff mechanism is configured so that the current path between the central portion of the metal component 12 to which the external lead is connected and the positive electrode lead 21a is cut off.
  • the battery internal pressure further rises, as shown in FIG. 3, a part of the resin component 18 breaks.
  • the gas discharge mechanism is configured so that the gas inside the battery is discharged.
  • the strength of the resin component 18 can be adjusted depending on the material and thickness, but the resin component 18 may be provided with an easily broken portion such as an annular groove.
  • the easily broken portion 16 is formed in an annular shape.
  • An annular easily broken portion may be formed by a step portion whose thickness is changed in the radial direction of the inner end plate portion 15.
  • the easily broken portion 16 may be partially discontinuous like a C shape.
  • the breaking strength of the resin component 18 can be adjusted according to the material and thickness thereof, and the resin component 18 may also have an easily broken portion.
  • the easily broken portion of the resin component 18 can be formed by, for example, an annular or C-shaped groove.
  • An easily broken portion may be formed by a step portion whose thickness is changed in the radial direction of the resin component 18.
  • the fixing strength of the resin component 18 by the metal component 12 can be adjusted by the pressure of press working when the resin component 18 is compressed.
  • the electrode body 20 is arranged inside the outer can 100.
  • the positive electrode plate 21 constituting the electrode body 20 has a positive electrode current collector and a positive electrode active material layer formed on the positive electrode current collector.
  • positive electrode active material layers are formed on both sides of the positive electrode current collector.
  • a metal foil such as aluminum, a film on which the metal is arranged on the surface layer, or the like is used.
  • a suitable positive electrode current collector is a metal foil containing aluminum or an aluminum alloy as a main component.
  • the thickness of the positive electrode current collector is, for example, 10 ⁇ m to 30 ⁇ m.
  • the positive electrode active material layer preferably contains a positive electrode active material, a conductive agent, and a binder.
  • the positive electrode plate 21 is dried after applying a positive electrode mixture slurry containing a positive electrode active material, a conductive agent, a binder, and a dispersion medium such as N-methyl-2-pyrrolidone (NMP) on both sides of the positive electrode current collector. And produced by rolling.
  • NMP N-methyl-2-pyrrolidone
  • the positive electrode active material examples include lithium-containing transition metal composite oxides containing transition metal elements such as Co, Mn, and Ni.
  • the lithium-containing transition metal composite oxide is not particularly limited, but contains at least one of the general formula Li 1 + x MO 2 (in the formula, ⁇ 0.2 ⁇ x ⁇ 0.2, M is Ni, Co, Mn, Al). ) Is preferable.
  • Examples of the above-mentioned conductive agent include carbon materials such as carbon black (CB), acetylene black (AB), Ketjen black, and graphite.
  • Examples of the binder include fluororesins such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVdF), polyacrylonitrile (PAN), polyimide (PI), acrylic resins, and polyolefin resins. Be done. Further, these resins may be used in combination with carboxymethyl cellulose (CMC) or a salt thereof, polyethylene oxide (PEO) and the like. One of these may be used alone, or two or more of them may be used in combination.
  • CMC carboxymethyl cellulose
  • PEO polyethylene oxide
  • the positive electrode plate 21 is provided with a positive electrode current collector exposed portion (not shown) in which the surface of the metal constituting the positive electrode current collector is exposed.
  • the exposed portion of the positive electrode current collector is a portion to which the positive electrode lead 21a is connected. This is a portion where the surface of the positive electrode current collector is not covered with the positive electrode active material layer.
  • One end side portion of the positive electrode lead 21a is bonded to the exposed portion of the positive electrode current collector by, for example, ultrasonic welding.
  • the other end side portion of the positive electrode lead 21a is led upward through an opening (not shown) formed in the disc-shaped first insulating plate 30 arranged on the upper side of the electrode body 20, and is led out of the metal component 12. It is connected to the lower surface (inner surface) of the flange portion 15a.
  • As the material of the positive electrode lead 21a for example, aluminum, aluminum alloy, nickel, nickel alloy, iron, stainless steel and the like are used.
  • the negative electrode plate 22 has a negative electrode current collector and a negative electrode active material layer formed on the negative electrode current collector. For example, negative electrode active material layers are formed on both sides of the negative electrode current collector. Further, the negative electrode plate 22 is provided with a negative electrode current collector exposed portion (not shown) at the end of winding. The exposed portion of the negative electrode current collector is a portion to which the negative electrode lead 22a is connected, and the surface of the negative electrode current collector is not covered with the negative electrode active material layer. One end side portion of the negative electrode lead 22a is bonded to the exposed portion of the negative electrode current collector by, for example, ultrasonic welding. The other end side portion of the negative electrode lead 22a is connected to the bottom portion of the outer can 100 through the outer peripheral side of the disc-shaped second insulating plate 31 arranged under the electrode body 20.
  • the negative electrode active material layer preferably contains a negative electrode active material and a binder.
  • the negative electrode plate 22 is produced by applying, for example, a negative electrode mixture slurry containing a negative electrode active material, a binder, water, and the like to both surfaces of a negative electrode current collector, and then drying and rolling.
  • the negative electrode active material is not particularly limited as long as it can reversibly occlude and release lithium ions, for example, a carbon material such as natural graphite or artificial graphite, a metal alloying with lithium such as Si or Sn, or these. Alloys containing, composite oxides and the like can be used.
  • the binder contained in the negative electrode active material layer for example, the same resin as in the case of the positive electrode plate 21 is used.
  • SBR styrene-butadiene rubber
  • CMC styrene-butadiene rubber
  • polyacrylic acid or a salt thereof, polyvinyl alcohol and the like can be used. One of these may be used alone, or two or more of them may be used in combination.
  • the negative electrode plate 22 is used by being wound around the positive electrode plate 21 in a state of being laminated via the separator 23.
  • the negative electrode lead 22a is used, or the negative electrode lead 22a is omitted, and the negative electrode current collector exposed portion is arranged over the entire circumference of the outermost peripheral surface of the winding end end of the negative electrode plate 22, and the negative electrode current collector is exposed.
  • the negative electrode plate 22 may be electrically connected to the outer can 100 by bringing the portion into contact with the inner peripheral surface of the cylindrical portion of the outer can 100. Thereby, better current collecting property can be ensured.
  • one end side portion of the negative electrode lead 22a may be joined to the negative electrode current collector exposed portion formed at the winding start side end portion of the negative electrode plate 22.
  • a porous sheet having ion permeability and insulating property is used for the separator 23.
  • the porous sheet include a microporous thin film, a woven fabric, and a non-woven fabric.
  • a polyolefin resin such as polyethylene or polypropylene is preferable.
  • the thickness of the separator 23 is, for example, 10 ⁇ m to 50 ⁇ m.
  • the separator 23 tends to be thinned as the capacity and output of the battery increase.
  • the separator 23 has a melting point of, for example, about 130 ° C. to 180 ° C.
  • the cylindrical battery 10 is assembled as follows, for example.
  • the electrode body 20 was inserted together with the lower disk-shaped second insulating plate 31 inside the bottomed cylindrical outer can 100 produced by drawing a steel plate, and was connected to the negative electrode plate 22.
  • the negative electrode lead 22a is connected to the bottom of the outer can 100 by welding.
  • a disk-shaped first insulating plate 30 is inserted inside the outer can 100 on the upper side of the electrode body 20, and a groove portion having a U-shaped cross section is inserted on the opening side above the first insulating plate 30 in the outer can 100.
  • 101 (FIG. 1) is formed by plastic working over the entire circumference in the circumferential direction.
  • the resin component 18 is caulked and fixed in advance on the outer peripheral side of the metal component 12.
  • the resin component 18 is press-processed so as to be compressed by the inner end plate portion 15 and the outer end plate portion 13 of the metal component 12, and the resin component 18 is caulked and fixed to the metal component 12.
  • the metal component 12 is stored inside the outer can 100 on the groove 101 via the resin component 18, and the open end of the outer can 100 is crimped to form a sealed cylindrical shape.
  • the battery 10 is manufactured.
  • the outer end plate portion 13 is exposed to the uppermost layer portion of the cylindrical battery 10 at the upper end of the sealing body 11.
  • the outer peripheral portion of the metal component 12 is placed at one end of the exterior can 100 via the resin component 18. It may be fixed by caulking. Then, after that, the resin component 18 may be pressed so as to be compressed by the inner end plate portion 15 and the outer end plate portion 13.
  • the metal component 12 constituting the sealing body 11 can have a current cutoff function, the number of parts of the component component of the sealing body 11 can be reduced. As a result, the man-hours for processing parts that require processing accuracy can be reduced, so that the manufacturing cost can be reduced.
  • FIG. 4 is a cross-sectional view of the cylindrical battery 10a of the comparative example.
  • the cylindrical battery 10a of the comparative example has a sealing structure at one end of the outer can 100a including a gasket 34 as a resin component and a sealing body 11a.
  • the sealing body 11a is composed of three parts: a metal valve body 36, an insulating member 38, and a metal body 40 having a vent. The central portions of the valve body 36 and the metal body 40 are connected to each other, and an insulating member 38 is interposed between the outer peripheral portions thereof.
  • the end portion of the positive electrode lead 21a led out from the electrode body 20 is connected to the metal body 40 radially outside the connecting portion of the valve body 36 and the metal body 40.
  • the metal body 40 has a thin wall portion at the connection portion with the valve body 36.

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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)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
PCT/JP2020/045746 2019-12-18 2020-12-09 円筒形電池 Ceased WO2021124995A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20901542.9A EP4080670A4 (en) 2019-12-18 2020-12-09 Cylindrical battery
JP2021565504A JP7686570B2 (ja) 2019-12-18 2020-12-09 円筒形電池
US17/785,267 US12347878B2 (en) 2019-12-18 2020-12-09 Cylindrical battery
CN202080087126.0A CN114868305B (zh) 2019-12-18 2020-12-09 圆筒形电池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-227988 2019-12-18
JP2019227988 2019-12-18

Publications (1)

Publication Number Publication Date
WO2021124995A1 true WO2021124995A1 (ja) 2021-06-24

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PCT/JP2020/045746 Ceased WO2021124995A1 (ja) 2019-12-18 2020-12-09 円筒形電池

Country Status (5)

Country Link
US (1) US12347878B2 (https=)
EP (1) EP4080670A4 (https=)
JP (1) JP7686570B2 (https=)
CN (1) CN114868305B (https=)
WO (1) WO2021124995A1 (https=)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220376332A1 (en) * 2019-12-18 2022-11-24 Sanyo Electric Co., Ltd. Cylindrical battery
WO2023176471A1 (ja) * 2022-03-17 2023-09-21 パナソニックエナジー株式会社 円筒形電池
WO2023242167A1 (en) * 2022-06-14 2023-12-21 Northvolt Ab A cylindrical secondary cell
EP4459785A4 (en) * 2021-12-28 2025-01-22 Panasonic Intellectual Property Management Co., Ltd. ENERGY STORAGE DEVICE
EP4354625A4 (en) * 2021-12-15 2025-07-16 Lg Energy Solution Ltd SECONDARY BATTERY AND BATTERY MODULE COMPRISING SAME

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Publication number Priority date Publication date Assignee Title
WO2021187045A1 (ja) * 2020-03-16 2021-09-23 三洋電機株式会社 円筒形電池
CN119856335A (zh) * 2022-09-14 2025-04-18 松下新能源株式会社 电池
CN115498354B (zh) * 2022-11-14 2023-03-03 宁德新能源科技有限公司 电化学装置以及用电装置

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WO2016143287A1 (ja) * 2015-03-06 2016-09-15 三洋電機株式会社 密閉型電池
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WO2019026527A1 (ja) * 2017-07-31 2019-02-07 パナソニックＩｐマネジメント株式会社 円筒形電池

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US12347878B2 (en) 2025-07-01
US20220376332A1 (en) 2022-11-24
CN114868305A (zh) 2022-08-05
CN114868305B (zh) 2025-10-28

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