WO2024176908A1 - 密閉電池 - Google Patents

密閉電池 Download PDF

Info

Publication number
WO2024176908A1
WO2024176908A1 PCT/JP2024/004986 JP2024004986W WO2024176908A1 WO 2024176908 A1 WO2024176908 A1 WO 2024176908A1 JP 2024004986 W JP2024004986 W JP 2024004986W WO 2024176908 A1 WO2024176908 A1 WO 2024176908A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
identification mark
plate
negative electrode
positive electrode
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/JP2024/004986
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
ジェローム デイビス
洋裕 今西
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 EP24760210.5A priority Critical patent/EP4672445A4/en
Priority to CN202480012190.0A priority patent/CN120642111A/zh
Priority to JP2025502295A priority patent/JPWO2024176908A1/ja
Publication of WO2024176908A1 publication Critical patent/WO2024176908A1/ja
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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M50/19—Sealing members characterised by the material
    • H01M50/193—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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 sealed batteries.
  • Sealed batteries equipped with an identification mark are known in the past (see, for example, Patent Documents 1 and 2). From this identification mark, it is possible to identify the production line and date and time of manufacture of the battery. For example, if a defect occurs for some reason during the battery manufacturing process or after the battery is shipped, this identification mark is used to analyze the cause.
  • Patent Document 1 describes providing an identification barcode (identification mark) on the outer periphery or end face of the battery can.
  • Patent Document 2 describes providing an identification code (identification mark) in a position different from the gas release valve on a sealing body that closes the opening of a rectangular exterior body in a rectangular secondary battery having a rectangular exterior body.
  • an identification mark is provided on the outer peripheral surface of a battery can, as in the configuration described in Patent Document 1, during the manufacturing process of a battery module comprising multiple batteries and a battery holder, the identification mark may be damaged when the outer peripheral surface of the battery comes into contact with other parts such as the battery holder. This may make the identification mark difficult to read. Furthermore, if the identification mark is provided on the outer peripheral surface, end face, or a position other than the gas exhaust valve of the battery when the battery abnormally heats up, the identification mark may become discolored or deformed due to the high temperature of the battery, making it difficult to read.
  • the sealed battery according to the present disclosure is a sealed battery comprising an electrode assembly in which positive and negative electrode plates are stacked with a separator between them, an exterior body that houses the electrode assembly and has an opening at one end, and a sealing body that closes the opening of the exterior body, the sealing body having an identification mark formed in a portion that can move away from the exterior body when the internal pressure of the battery increases.
  • the sealed battery disclosed herein allows an identification mark to be provided on a portion of the sealing body that is unlikely to come into contact with other components during the manufacturing process of the battery module that contains the battery, and that moves away from the battery before being exposed to high temperatures in the event of abnormal heat generation from the battery. This makes it easier to read the identification mark both after the battery is assembled into the battery module and after abnormal heat generation.
  • FIG. 1 is a schematic diagram showing an axial cross section of a cylindrical battery as a sealed battery according to an embodiment of the present invention.
  • 2A is a schematic diagram of the cylindrical battery of FIG. 1 as seen from the side
  • FIG. 2B is a diagram of part A of FIG.
  • FIG. 2A is a schematic diagram showing a state in which the valve portion of the sealing body is blown off due to an increase in the internal pressure of the battery when abnormal heat is generated in the cylindrical battery of FIG. 1
  • FIG. 2B is a diagram showing the outer surface of the valve portion shown in part B of FIG.
  • FIG. 4 is a schematic diagram showing a state in which the temperature rise of the cylindrical battery has progressed further after the state shown in FIG.
  • FIG. 3 is a view corresponding to FIG.
  • FIG. 11 is a schematic diagram showing a state in which a rupture plate of a sealing body breaks and a valve portion is deformed so as to move outward when abnormal heat is generated in another example of an embodiment.
  • a cylindrical battery 10 in which a wound electrode body 14 is housed in a cylindrical exterior can 20 with a bottom is exemplified as a sealed battery, but the exterior body of the battery is not limited to a cylindrical exterior can.
  • the sealed battery according to the present disclosure may be, for example, a prismatic battery equipped with a prismatic exterior can.
  • the cylindrical battery 10 includes an electrode body 14, an electrolyte, and an outer can 20 that contains the electrode body 14 and the electrolyte.
  • the electrode body 14 includes a positive electrode plate 11, a negative electrode plate 12, and a separator 13, and has a structure in which the positive electrode plate 11 and the negative electrode plate 12 are stacked with the separator 13 interposed therebetween and wound in a spiral shape.
  • the outer can 20 is a bottomed cylindrical metal container that has an opening at one axial end, and the opening of the outer can 20 is closed by a sealing body 19.
  • the sealing body 19 side of the cylindrical battery 10 is referred to as the top
  • the bottom side of the outer can 20 is referred to as the bottom.
  • the electrolyte may be an aqueous electrolyte, but in this embodiment, a nonaqueous electrolyte is used.
  • the nonaqueous electrolyte includes a nonaqueous solvent and an electrolyte salt dissolved in the nonaqueous solvent.
  • esters, ethers, nitriles, amides, and mixed solvents of two or more of these are used as the nonaqueous solvent.
  • the nonaqueous solvent include ethylene carbonate (EC), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and mixed solvents of these.
  • the nonaqueous solvent may contain a halogen-substituted product (e.g., fluoroethylene carbonate, etc.) in which at least a part of the hydrogen of these solvents is replaced with a halogen atom such as fluorine.
  • a halogen-substituted product e.g., fluoroethylene carbonate, etc.
  • a lithium salt such as LiPF 6 is used as the electrolyte salt.
  • the positive electrode plate 11, negative electrode plate 12, and separator 13 that make up the electrode body 14 are all long, strip-shaped bodies that are wound in a spiral shape and stacked in the radial direction of the electrode body 14.
  • the negative electrode plate 12 is formed to be slightly larger than the positive electrode plate 11 in order to prevent lithium precipitation. In other words, the negative electrode plate 12 is formed to be longer in the length direction and width direction (short direction) than the positive electrode plate 11.
  • the separator 13 is formed to be at least slightly larger than the positive electrode plate 11, and two of them are arranged to sandwich the positive electrode plate 11.
  • the positive electrode plate 11 has a positive electrode core and a positive electrode mixture layer formed on the positive electrode core.
  • a foil of a metal such as aluminum or an aluminum alloy that is stable in the potential range of the positive electrode plate 11, or a film with the metal disposed on the surface layer can be used.
  • the positive electrode mixture layer contains a positive electrode active material, a conductive agent such as carbon black or carbon nanotubes, and a binder such as polyvinylidene fluoride, and is preferably formed on both sides of the positive electrode core.
  • the positive electrode plate 11 can be produced by applying a positive electrode mixture slurry containing a positive electrode active material, a conductive agent, and a binder to both sides of the positive electrode core and compressing the coating.
  • the positive electrode active material contained in the positive electrode mixture layer is a lithium transition metal complex oxide.
  • the lithium transition metal complex oxide is a complex oxide that contains metal elements such as Co, Mn, Ni, and Al in addition to Li.
  • the metal element constituting the complex oxide is, for example, at least one selected from Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Sn, Sb, W, Pb, and Bi.
  • the complex oxide contains at least one selected from Ni, Mn, and Co.
  • the negative electrode plate 12 has a negative electrode core and a negative electrode mixture layer formed on the negative electrode core.
  • a foil of a metal such as copper or a copper alloy that is stable in the potential range of the negative electrode plate 12, 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, a binder, and, if necessary, a conductive agent such as carbon black or carbon nanotubes, and is preferably formed on both sides of the negative electrode core.
  • the binder for example, styrene-butadiene rubber (SBR) can be used, and carboxymethyl cellulose or a salt thereof may also be used in combination.
  • SBR styrene-butadiene rubber
  • the negative electrode plate 12 can be produced by applying a negative electrode mixture slurry containing a negative electrode active material and a binder to both sides of the negative electrode core and compressing the coating.
  • An example of the negative electrode active material contained in the negative electrode mixture layer is a carbon material such as graphite that reversibly absorbs and releases lithium ions.
  • the graphite may be either natural graphite or artificial graphite.
  • an element that alloys with Li, such as Si or Sn, or a material containing the element may be used as the negative electrode active material.
  • a composite material containing Si is preferable.
  • a suitable example of a composite material containing Si is a material in which a fine Si phase is dispersed in a SiO2 phase, a silicate phase such as lithium silicate, a carbon phase, or a silicide phase.
  • 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.
  • Suitable materials for the separator 13 include polyolefins such as polyethylene and polypropylene, and cellulose.
  • the separator 13 may have a single-layer structure or a multi-layer structure.
  • a highly heat-resistant resin layer such as an aramid resin may be formed on the surface of the separator 13.
  • a filler layer containing an inorganic filler may be formed on the interface between the separator 13 and at least one of the positive electrode plate 11 and the negative electrode plate 12.
  • Insulating plates 15 and 16 are arranged above and below the electrode body 14.
  • the positive electrode lead 17 passes through a through hole in the insulating plate 15 and extends toward the sealing body 19, and the negative electrode lead 18 passes outside the insulating plate 16 and extends toward the bottom 20a of the outer can 20.
  • the positive electrode lead 17 is connected to the underside of the internal terminal plate 21 of the sealing body 19 by laser welding or the like, and the rupture plate 22 (described below), which is the top plate of the sealing body 19 and is electrically connected to the internal terminal plate 21, serves as the positive electrode terminal.
  • the negative electrode lead 18 is connected to the inner surface of the bottom 20a of the outer can 20 by laser welding or the like, and the outer can 20 serves as the negative electrode terminal.
  • the positive electrode lead 17 is joined to the positive electrode core by ultrasonic welding or the like.
  • the positive electrode lead 17 is joined, for example, to a longitudinal center portion of the positive electrode plate 11, away from both longitudinal ends.
  • the positive electrode lead 17 may be joined to a position substantially equidistant from both longitudinal ends of the positive electrode plate 11.
  • the negative electrode lead 18 is joined to the negative electrode core by ultrasonic welding or the like. In the example shown in FIG. 1, the negative electrode lead 18 is joined to the winding end side end, which is the longitudinal end of the negative electrode plate 12 located on the outer periphery of the electrode body 14.
  • the positive electrode lead 17 and the negative electrode lead 18 are, for example, band-shaped metal members, and have a thickness of 30 ⁇ m to 100 ⁇ m.
  • a negative electrode plate 12 may be disposed on the outer peripheral surface of the electrode body 14.
  • an exposed portion in which the surface of the negative electrode core body is exposed may be formed on the outer peripheral surface of the electrode body 14, and the exposed portion may contact the inner surface of the outer can 20 to be electrically connected to the negative electrode plate 12 and the outer can 20.
  • the negative electrode plate 12 may not have a negative electrode lead 18.
  • the outer can 20 is a cylindrical metal container with a bottom and an opening at one axial end.
  • a resin gasket 24 is provided between the outer can 20 and the sealing body 19 to ensure airtightness inside the battery and insulation between the outer can 20 and the sealing body 19.
  • the outer can 20 has a grooved portion 20b that supports the sealing body 19, with part of the side surface protruding inward.
  • the grooved portion 20b is preferably formed in an annular shape along the circumferential direction of the outer can 20, and supports the sealing body 19 with its upper surface.
  • the sealing body 19 is fixed to the top of the outer can 20 by the grooved portion 20b and the open end of the outer can 20 that is crimped to the sealing body 19.
  • the sealing body 19 is a disk-shaped member equipped with a current interruption mechanism.
  • the sealing body 19 has a structure in which, from the electrode body 14 side, an internal terminal plate 21, an insulating plate 23, and a rupture plate 22 are stacked.
  • the internal terminal plate 21 has a thin-walled portion in the center that is thinner than the outer annular portion to which the positive electrode lead 17 is connected.
  • the insulating plate 23 is a disk-shaped member made of insulating material with an opening 23a in the center.
  • the rupture plate 22 is disposed opposite the internal terminal plate 21 with the insulating plate 23 in between.
  • the center of the rupture plate 22 is connected to the thin-walled portion in the center of the internal terminal plate 21 by welding or the like through the opening 23a of the insulating plate 23.
  • the rupture plate 22 has an easily breakable portion 22a in the radial middle portion.
  • the easily breakable portion 22a is formed by a ring-shaped thin portion 22b formed in a radial portion of the rupture plate 22.
  • the easily breakable portion 22a is formed by forming an annular groove 22c in a radial portion of the inner surface (lower surface in Figure 1) of the rupture plate 22.
  • the groove for forming the easily breakable portion 22a may be formed in the outer surface (upper surface in Figure 1) of the rupture plate 22.
  • the valve portion 22d is formed by a portion of the rupture plate 22 that is radially inward from the easily breakable portion 22a.
  • the sealing body 19 is fixed by crimping to the outer can 20 via a gasket 24, radially outward from the easily breakable portion 22a.
  • the pressure inside the battery acts on the groove 22c of the rupture plate 22 through the vent holes formed in the internal terminal plate 21 and the insulating plate 23.
  • the internal terminal plate 21 to which the positive electrode lead 17 is connected is electrically connected to the rupture plate 22, forming a current path from the electrode body 14 to the rupture plate 22.
  • the internal terminal plate 21 breaks, the thin-walled portion of the internal terminal plate 21 is separated from its outer annular portion, and the valve portion 22d deforms so as to become convex toward the outside of the battery. This cuts off the current path.
  • the easily breakable portion 22a breaks as described above, forming a gas exhaust port. At this time, if the easily breakable portion 22a breaks over its entire circumference, the valve portion 22d is blown off to the outside of the battery.
  • valve portion 22d deforms so as to move outward.
  • the valve portion 22d is a portion that can move away from the exterior can 20 if the battery internal pressure increases.
  • FIG. 1 is a schematic diagram of a cylindrical battery 10 as seen from the side
  • Figure 2(b) is a diagram of part A in Figure 2(a) as seen from above.
  • the sealing body 19 has an identification mark 30 formed on the outer surface of the valve portion 22d, radially inward from the easily breakable portion 22a. It is preferable to form the identification mark 30 at a position away from the center of the valve portion 22d so as to avoid the connection position of the external lead provided on the positive electrode terminal plate (not shown) to the rupture plate 22.
  • the identification mark 30 is an individual marking given to the cylindrical battery 10, and provides identification information for distinguishing it from other cylindrical batteries 10.
  • a different identification mark 30 is provided for each cylindrical battery 10, or for each group of a predetermined number of cylindrical batteries 10.
  • the identification mark 30 may be a lot number given to a group of products manufactured at the same time, or a product number given to each individual product.
  • the identification mark 30 makes it possible to distinguish between individual cylindrical batteries 10 or individual production lots, and is used to obtain information relating to the manufacture of cylindrical batteries 10.
  • a manufacturer of cylindrical batteries 10 has a database that contains information relating to the manufacture of cylindrical batteries 10, linked to the identification mark 30 of the cylindrical battery 10. Therefore, by reading the identification mark 30 with a reading device such as a reader and identifying the cylindrical battery 10, information relating to the manufacture of the cylindrical battery 10 can be obtained.
  • An example of information relating to the manufacture of cylindrical batteries 10 is the history of the manufacturing process, including information such as the manufacturing line and the date and time of manufacture.
  • the identification mark 30 is composed of at least one selected from, for example, numbers, letters, and an identification code.
  • the identification mark 30 may be a display consisting of a combination of numbers and letters.
  • the identification code constituting the identification mark 30 may be any one-dimensional code, two-dimensional code, or three-dimensional code, but is preferably a two-dimensional code. In the example shown in FIG. 2, a square-shaped two-dimensional code (QR code (registered trademark)) is formed as the identification mark 30.
  • the identification mark 30 may be composed of at least one selected from a protrusion and a depression as long as it can be read using a reading device such as a reader. Alternatively, the identification mark 30 may have a color different from the surroundings. The numbers, letters, or identification code that compose the identification mark 30 may not have a protrusion or depression, and only its color may differ from the surroundings.
  • the identification mark 30 may be formed by printing such as inkjet printing, or by pressing, but is preferably formed by laser marking.
  • Laser marking is a method of forming a mark by irradiating the valve portion 22d with laser light.
  • the identification mark 30 is a laser marking mark, the mark is formed, for example, by discoloring the portion irradiated with the laser light. Also, a dent may be formed in the portion irradiated with the laser light.
  • Laser marking marks are highly durable, so they are less likely to cause reading problems even after the cylindrical battery 10 has been used.
  • the sealing body 19 has an identification mark 30 formed in a portion that can move away from the outer can 20 if the battery's internal pressure increases. This makes it difficult for the identification mark 30 to come into contact with other components during the manufacturing process of the battery module including the battery, and allows the identification mark 30 to be provided in a portion of the sealing body 19 that moves away from the battery before being exposed to high temperatures in the event of abnormal heat generation in the battery. This makes it easier to read the identification mark both after the battery is assembled into the battery module and after abnormal heat generation.
  • Figure 3(a) is a schematic diagram showing the state in which the valve portion 22d of the sealing body 19 is blown off due to an increase in the battery's internal pressure when the cylindrical battery 10 generates abnormal heat
  • Figure 3(b) is a diagram showing the outer surface of the valve portion 22d shown in part B of Figure 3(a).
  • FIG. 4 is a schematic diagram showing the state after the temperature rise of the cylindrical battery 10 has progressed further.
  • the dashed line indicates that a large amount of heat is locally generated at the upper part of the cylindrical battery 10.
  • the valve portion 22d on which the identification mark is formed will have separated from the cylindrical battery 10 and fallen around the cylindrical battery 10. This prevents the thermal effects of the cylindrical battery 10 from affecting the identification mark 30, causing discoloration or deformation that makes it difficult to read the mark.
  • the identification mark 30 is formed on the outer surface of the valve portion 22d, but the identification mark may be formed on the inner surface of the valve portion 22d. On the other hand, from the standpoint of ease of forming the identification mark 30, it is preferable that the identification mark 30 is formed on the outer surface of the valve portion 22d, as in the embodiment of Figures 1 to 4.
  • Figure 5 is a diagram of a cylindrical battery 10a according to another embodiment, corresponding to Figure 2(b).
  • Figure 6 is a schematic diagram showing a state in which the rupture plate 32 of the sealing body 19a breaks and the valve portion 32d is deformed to move outward during abnormal heat generation in another embodiment.
  • the thin-walled portion 32b that forms the easily breakable portion 32a of the rupture plate 32 is provided in a C-shape on the inner surface of the rupture plate 32, and is not provided around the entire circumference.
  • the valve portion 32d is formed by a portion of the rupture plate 32 that is radially inward from the easily breakable portion 32a.
  • the identification mark 30 is formed on the outer surface of the valve portion 22d, radially inward from the easily breakable portion 32a.
  • the easily breakable portion 32a breaks due to an increase in the battery's internal pressure, forming a gas outlet.
  • This break causes the valve portion 22d to move outward from the battery, away from the exterior can 20, while still connected to the remaining outer periphery of the rupture plate 32 at the circumferentially discontinuous portion of the easily breakable portion 32a.
  • the other configurations and functions are the same as those of FIGS. 1 to 4.
  • 10a cylindrical battery 11 positive electrode plate, 12 negative electrode plate, 13 separator, 14 electrode body, 15, 16 insulating plate, 17 positive electrode lead, 18 negative electrode lead, 19 sealing body, 20 outer can, 20a bottom, 20b grooved portion, 21 internal terminal plate, 22 rupture plate, 22a easily breakable portion, 22b thin portion, 22c groove, 22d valve portion, 23 insulating plate, 23a opening, 24 gasket, 30 identification mark, 32 rupture plate, 32a easily breakable portion, 32b thin portion, 32d valve portion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
PCT/JP2024/004986 2023-02-21 2024-02-14 密閉電池 Ceased WO2024176908A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP24760210.5A EP4672445A4 (en) 2023-02-21 2024-02-14 SEALED BATTERY
CN202480012190.0A CN120642111A (zh) 2023-02-21 2024-02-14 密闭电池
JP2025502295A JPWO2024176908A1 (https=) 2023-02-21 2024-02-14

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-025071 2023-02-21
JP2023025071 2023-02-21

Publications (1)

Publication Number Publication Date
WO2024176908A1 true WO2024176908A1 (ja) 2024-08-29

Family

ID=92500801

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/004986 Ceased WO2024176908A1 (ja) 2023-02-21 2024-02-14 密閉電池

Country Status (4)

Country Link
EP (1) EP4672445A4 (https=)
JP (1) JPWO2024176908A1 (https=)
CN (1) CN120642111A (https=)
WO (1) WO2024176908A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006155971A (ja) * 2004-11-26 2006-06-15 Nec Tokin Corp 二次電池
JP2008186712A (ja) * 2007-01-30 2008-08-14 Hitachi Maxell Ltd 密閉型電池
JP2019029189A (ja) 2017-07-31 2019-02-21 三洋電機株式会社 角形二次電池及びそれを用いた組電池
JP2019160452A (ja) * 2018-03-08 2019-09-19 株式会社豊田自動織機 蓄電装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6214629B2 (ja) 2012-05-04 2017-10-18 トライコピアン・エルエルシー 電池を識別するシステムおよび方法
JP2018014160A (ja) * 2014-11-27 2018-01-25 三洋電機株式会社 円筒形非水電解質二次電池
JP6890027B2 (ja) * 2017-03-28 2021-06-18 Fdk株式会社 円筒形電池の封口体、および円筒形電池

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006155971A (ja) * 2004-11-26 2006-06-15 Nec Tokin Corp 二次電池
JP2008186712A (ja) * 2007-01-30 2008-08-14 Hitachi Maxell Ltd 密閉型電池
JP2019029189A (ja) 2017-07-31 2019-02-21 三洋電機株式会社 角形二次電池及びそれを用いた組電池
JP2019160452A (ja) * 2018-03-08 2019-09-19 株式会社豊田自動織機 蓄電装置

Also Published As

Publication number Publication date
CN120642111A (zh) 2025-09-12
EP4672445A1 (en) 2025-12-31
JPWO2024176908A1 (https=) 2024-08-29
EP4672445A4 (en) 2026-02-25

Similar Documents

Publication Publication Date Title
US12191532B2 (en) Electrode plate, electrode body, and battery
JP7750910B2 (ja) 二次電池
US12308394B2 (en) Rectangular secondary battery
JP7160340B2 (ja) 二次電池
WO2024176908A1 (ja) 密閉電池
US20260074175A1 (en) Electrode plate and battery
JP5360795B2 (ja) 非水電解液電池
JP7120026B2 (ja) 二次電池
JP5114018B2 (ja) フィルム外装電気デバイス及びその製造方法
WO2024176930A1 (ja) 電池及び電池の製造方法
EP4447137A1 (en) Electrode plate, electrode body, and battery
CN110214384B (zh) 二次电池及其制造方法
US20260088378A1 (en) Electrode plate, electrode body, battery, and method for manufacturing electrode plate
JP7340568B2 (ja) 電池
WO2024176841A1 (ja) 電極板及びその製造方法と電池
US20230344046A1 (en) Sealed battery
JP6108119B2 (ja) 密閉型二次電池
WO2013031888A1 (ja) 電池情報管理装置および電池
WO2025047140A1 (ja) 蓄電装置の製造方法および蓄電装置
WO2025062918A1 (ja) 円筒形の非水電解質二次電池
WO2026048248A1 (ja) 二次電池
WO2025070189A1 (ja) 円筒形電池
WO2024190548A1 (ja) 電池
WO2024181045A1 (ja) 二次電池
CN121123555A (zh) 蓄电设备

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: 24760210

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025502295

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025502295

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202517076288

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 202480012190.0

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 202480012190.0

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2024760210

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2024760210

Country of ref document: EP

Effective date: 20250922

ENP Entry into the national phase

Ref document number: 2024760210

Country of ref document: EP

Effective date: 20250922

WWP Wipo information: published in national office

Ref document number: 202517076288

Country of ref document: IN

WWP Wipo information: published in national office

Ref document number: 2024760210

Country of ref document: EP