WO2022107716A1 - 円筒形電池 - Google Patents
円筒形電池 Download PDFInfo
- Publication number
- WO2022107716A1 WO2022107716A1 PCT/JP2021/041872 JP2021041872W WO2022107716A1 WO 2022107716 A1 WO2022107716 A1 WO 2022107716A1 JP 2021041872 W JP2021041872 W JP 2021041872W WO 2022107716 A1 WO2022107716 A1 WO 2022107716A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sealing body
- positive electrode
- negative electrode
- cylindrical battery
- open end
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 46
- 238000002788 crimping Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 239000003125 aqueous solvent Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011255 nonaqueous electrolyte Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- -1 lithium transition metal Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—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
- H01M50/166—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
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/547—Terminals characterised by the disposition of the terminals on the 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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.
- an outer can has a grooved portion whose side surface is partially overhanging inward, the open end of the outer can is bent inward, and a gasket interposed between the grooved portion and the open end is placed in the vertical direction.
- the sealing body is crimped and fixed by compressing it to.
- positive electrode leads and negative electrode leads protrude from the positive electrode and negative electrode contained in the electrode body, respectively.
- the sealing body is connected to the positive electrode lead to become a positive electrode external terminal, and the outer can is connected to the negative electrode lead to form a negative electrode external terminal. Become.
- an external lead is connected to each of the sealing body and the outer can, and the plurality of cylindrical batteries are connected to each other by the external lead.
- an external lead may be connected to the open end of the outer can located on the battery sealing body side and to the adjacent battery sealing body.
- the open end of the outer can is short, so workability when connecting an external lead to the open end is not good.
- the gasket cannot be uniformly compressed at the open end, wrinkles and wrinkles occur, and the flatness of the open end deteriorates. Therefore, the external lead cannot be stably connected to the end of the opening as an external terminal.
- an object of the present disclosure is to provide a cylindrical battery having an external terminal at the open end of the outer can, which has a polarity different from that of the sealing body and is easily connected to an external lead.
- the cylindrical battery according to one aspect of the present disclosure includes an electrode body including a positive electrode and a negative electrode, a bottomed cylindrical outer can that houses the electrode body and is connected to either the positive electrode or the negative electrode, and a positive electrode and a negative electrode.
- the outer can has a protrusion whose side surface projects radially inward, and the opening end extends radially outward, and the sealing body is via a gasket. It is characterized in that it is caulked and fixed inward in the radial direction by a protruding portion.
- the open end for connecting the external lead extends outward in the radial direction, so that the open end of the outer can of the conventional cylindrical battery is compared with the open end. It is possible to form an open end portion that is flat and has a sufficient area. As a result, it is possible to form an external terminal having a polarity different from that of the sealing body and being easily connected to an external lead at the open end of the outer can.
- FIG. 1 is an enlarged view of a part of the upper end of the outer can in FIG.
- FIG. 2 is a diagram showing an embodiment further including a conductive member joined to the end of the opening. It is a figure corresponding to FIG. 2 in another example of an embodiment.
- FIG. 1 is a vertical sectional view of a cylindrical battery 10 which is an example of an embodiment.
- the cylindrical battery 10 has an electrode body 14, a bottomed cylindrical outer can 16 accommodating the electrode body 14 and an electrolyte (not shown), and a gasket 18 at the opening of the outer can 16. It is provided with a sealing body 17 that closes through.
- the electrode body 14 includes a positive electrode 11, a negative electrode 12, and a separator 13, and has a structure in which the positive electrode 11 and the negative electrode 12 are spirally wound via the separator 13.
- the direction along the axial direction of the outer can 16 is referred to as "vertical direction or vertical direction”
- the sealing body 17 side is referred to as "upper”
- the bottom surface side of the outer can 16 is referred to as "lower”. do.
- the direction perpendicular to the axial direction of the outer can 16 will be referred to as "horizontal direction or radial direction"
- the radial inner side of the outer can 16 will be referred to as the inner side
- the radial outer side will be referred to as the outer side.
- the positive electrode 11 has a positive electrode core body and a positive electrode mixture layer formed on at least one surface of the core body.
- a metal foil stable in the potential range of the positive electrode 11 such as aluminum or an aluminum alloy, a film in which the metal is arranged on the surface layer, or the like can be used.
- the positive electrode mixture layer contains a positive electrode active material, a conductive agent such as acetylene black, and a binder such as polyvinylidene fluoride, and is preferably formed on both sides of the positive electrode core.
- a lithium transition metal composite oxide or the like is used for example.
- the negative electrode 12 has a negative electrode core body and a negative electrode mixture layer formed on at least one surface of the core body.
- a metal foil stable in the potential range of the negative electrode 12 such as copper or a copper alloy, a film in which the metal is arranged on the surface layer, or the like can be used.
- the negative electrode mixture layer contains a negative electrode active material and a binder such as styrene-butadiene rubber (SBR), and is preferably formed on both sides of the negative electrode core.
- SBR styrene-butadiene rubber
- the negative electrode active material for example, graphite, a silicon-containing compound or the like is used.
- the electrolyte may be an aqueous electrolyte or a non-aqueous electrolyte. Further, it may be either a liquid electrolyte or a solid electrolyte. In this embodiment, a non-aqueous electrolyte is used.
- the non-aqueous electrolyte contains a non-aqueous solvent and an electrolyte salt dissolved in the non-aqueous solvent.
- the non-aqueous solvent for example, esters, ethers, nitriles, amides, and a mixed solvent of two or more of these can be used.
- the non-aqueous solvent may contain a halogen-substituted product in which at least a part of hydrogen in these solvents is substituted with a halogen atom such as fluorine.
- a halogen atom such as fluorine.
- the electrolyte salt for example, a lithium salt such as LiPF 6 is used.
- the cylindrical battery 10 includes insulating plates 19 and 20 arranged above and below the electrode body 14, respectively.
- the outer can 16 is connected to either the positive electrode 11 or the negative electrode 12, and the sealing body 17 is connected to the other of the positive electrode 11 and the negative electrode 12.
- the positive electrode lead 21 connected to the positive electrode 11 extends toward the sealing body 17 through the through hole of the insulating plate 19, and the negative electrode lead 22 connected to the negative electrode 12 passes through the outside of the insulating plate 20. It extends to the bottom surface side of the outer can 16.
- the positive electrode lead 21 is connected to the internal terminal plate 25 which is the bottom plate of the sealing body 17 by welding or the like, and the rupture plate 26 of the sealing body 17 electrically connected to the internal terminal plate 25 serves as the positive electrode external terminal.
- the negative electrode lead 22 is connected to the inner surface of the bottom surface of the outer can 16 by welding or the like, and the outer can 16 serves as a negative electrode external terminal.
- the negative electrode lead may be connected to the inner surface of the sealing body 17, and the positive electrode lead may be connected to the inner surface of the outer can 16.
- the sealing body 17 serves as the negative electrode external terminal
- the outer can 16 serves as the positive electrode external terminal.
- the outer can 16 is a metal container having one end (upper end) open in the axial direction, and has a disk-like bottom surface and a cylindrical side surface along the outer peripheral edge of the bottom surface.
- the sealing body 17 is formed in a disk shape corresponding to the shape of the opening of the outer can 16.
- the gasket 18 is an annular member made of resin, which secures the airtightness inside the battery and also secures the electrical insulation of the outer can 16 and the sealing body 17.
- the sealing body 17 is caulked and fixed via a gasket 18 inside the protruding portion 16a of the outer can 16 in the radial direction.
- the outer can 16 has a protruding portion 16a whose side surface projects inward in the radial direction, and the opening end portion 16b extends outward in the radial direction.
- the protrusion 16a functions to crimp and fix the sealing body 17.
- An external lead is connected to the open end 16b.
- the outer can 16 has a grooved portion 23 whose side surface projects from the outside to the inside.
- the grooved portion 23 is formed in an annular shape along the circumferential direction of the outer can 16 by spinning processing from the outside of the side surface.
- the grooved portion 23 has a substantially U-shaped cross section, and the sealing body 17 is supported on the upper surface thereof. Since the grooved portion 23 supports the sealing body 17 from below, the positioning of the sealing body 17 at the time of manufacturing the cylindrical battery 10 becomes easy.
- the outer can 16 does not have to have the grooved portion 23.
- the projecting portion 16a crimps and fixes the sealing body 17 inward in the radial direction, so that the airtightness inside the battery can be ensured even if the outer can 16 does not have the grooved portion 23.
- the space for accommodating the electrode body 14 inside the outer can 16 can be increased in the vertical direction to increase the capacity of the battery.
- the sealing body 17 is a disk-shaped member provided with a current cutoff mechanism.
- the sealing body 17 has a structure in which an internal terminal plate 25, an insulating plate 27, and a rupture plate 26 are laminated in this order from the electrode body 14 side.
- the internal terminal plate 25 is a metal plate including an annular portion 25a to which the positive electrode lead 21 is connected and a thin central portion 25b that is separated from the annular portion 25a when the internal pressure of the battery exceeds a predetermined threshold value.
- a ventilation hole 25c is formed in the annular portion 25a.
- the rupture plate 26 is arranged to face the internal terminal plate 25 with the insulating plate 27 interposed therebetween.
- the insulating plate 27 is formed with an opening 27a at the center in the radial direction and a ventilation hole 27b at a portion overlapping the ventilation hole 25c of the internal terminal plate 25.
- the rupture plate 26 has a valve portion 26a that breaks when the internal pressure of the battery exceeds a predetermined threshold value, and the valve portion 26a is welded to the central portion 25b of the internal terminal plate 25 through the opening 27a of the insulating plate 27. It is connected by.
- the insulating plate 27 insulates a portion other than the connecting portion between the annular portion 25a and the central portion 25b of the valve portion 26a.
- the valve portion 26a includes a convex downward convex portion inside the battery and a thin-walled portion formed around the downward convex portion, and is formed in the radial center portion of the rupture plate 26.
- the internal terminal plate 25 to which the positive electrode lead 21 is connected and the rupture plate 26 are electrically connected to form a current path from the electrode body 14 to the rupture plate 26.
- the internal terminal plate 25 is broken, the central portion 25b is separated from the annular portion 25a, and the valve portion 26a is deformed so as to be convex toward the upper side of the battery. This cuts off the current path.
- the valve portion 26a breaks and a gas discharge port is formed.
- the structure of the sealing body is not limited to the structure shown in FIG.
- the sealing body may have a laminated structure including two valve bodies, or may have a convex sealing body cap covering the valve body.
- a plurality of cylindrical batteries 10 are connected in series and modularized.
- the external lead is connected to the opening end portion 16b and the sealing body 17 by welding or the like.
- the connection distance between the batteries can be shortened as compared with the case where the external lead is connected to the bottom surface of the outer can 16.
- FIG. 2 is an enlarged view of a part of the upper end of the outer can in FIG.
- the outer can 16 has a protruding portion 16a whose side surface protrudes inward in the radial direction.
- the protrusion 16a compresses the gasket 18 inward in the radial direction to crimp and fix the sealing body 17.
- the protruding portion 16a is formed on the entire circumference of the outer can 16.
- the protruding portion 16a is formed in an annular shape along the circumferential direction of the outer can 16 by spinning processing from the outside of the side surface.
- protrusion 16a is formed in the vertical direction, but a plurality of protrusions 16a may be formed.
- the shape of the protruding portion 16a is not particularly limited, and the cross section may be a substantially V-shaped shape as shown in FIG. 2, a substantially U-shaped shape, a substantially W-shaped shape, or the like. Further, one or a plurality of protruding portions 16a may be formed in a part of the outer can 16 in the circumferential direction. In this case, from the viewpoint of improving the airtightness inside the battery, it is preferable that the pair of protruding portions 16a are formed so as to face each other in the radial direction.
- the opening end portion 16b is formed by bending the opening edge portion (upper end portion) of the outer can 16 outward, and extends substantially horizontally outward in the radial direction.
- the length L1 of the opening end portion 16b is, for example, 0.5 to 3 mm.
- the length L1 of the open end portion 16b means the length along the radial direction from the side surface of the outer can 16 to the end portion. Similar to the grooved portion 23, the open end portion 16b is formed in an annular shape along the circumferential direction of the outer can 16.
- the opening end portion 16b is formed on the entire circumference of the outer can 16.
- the external lead can be connected to the opening end portion 16b in any direction in the circumferential direction of the outer can 16.
- the opening end portion 16b may be formed one or more in a part of the outer can 16 in the circumferential direction.
- the cylindrical battery 10 may further include a conductive member 30 bonded to the open end portion 16b.
- a conductive member 30 bonded to the open end portion 16b.
- an external lead can be connected to the surface of the conductive member 30 having a larger area than the open end portion 16b, and the conductive member 30 functions as an external terminal.
- the conductive member 30 is, for example, a flat plate made of metal.
- the thickness of the conductive member 30 is, for example, 0.05 to 0.5 mm.
- the position of the outer end 30a of the conductive member 30 is not particularly limited, but for example, as shown in FIG. 3, the open end and the outer end 30a of the outer can 16 may be substantially aligned.
- the position of the inner end 30b of the conductive member 30 is not particularly limited, and may be outside the inner end of the gasket 18, for example, as shown in FIG. Further, the conductive member 30 may be a ring-shaped plate member.
- the outer diameter of the conductive member 30 is, for example, ⁇ 20 to 30 mm and the hollow cut hole is ⁇ 15 to 20 mm.
- a welding method, an adhesive method, or the like can be used as a method of joining the conductive member 30 and the open end portion 16b.
- the welding method include laser welding and resistance welding, and laser welding is preferable.
- the bonding method include a method using an adhesive or solder.
- the adhesive preferably has conductivity.
- the surface roughness of the conductive member 30 may be increased to improve weldability.
- the material of the conductive member 30 is preferably the same as the main component of the material of the outer can 16. As a result, the conductive member 30 and the open end portion 16b can be easily joined by laser welding.
- the material of the conductive member 30 and the open end portion 16b may be a steel plate material. Further, the surface of the steel plate material may be plated with, for example, nickel or the like.
- the cross-sectional shape of the gasket 18 may be an L-shape.
- the base portion 18a extending in the radial direction of the gasket 18 prevents the outer peripheral edge of the sealing body 17 from coming into contact with the grooved portion 23.
- the upright portion 18b extending in the vertical direction of the gasket 18 is compressed between the protruding portion 16a of the outer can 16 and the sealing body 17 while preventing the outer peripheral edge of the sealing body 17 from coming into contact with the outer can 16. By doing so, the sealing body 17 is crimped and fixed.
- the outer shape of the gasket 18 is not particularly limited as long as the base portion 18a and the upright portion 18b can perform their respective functions.
- press working is performed with a 90 ° bent portion formed near the upper end of a bottomed cylindrical outer can 16 made of a steel plate material, the upper end is trimmed, and the length is 0.5 to the outside in the radial direction.
- a 3 mm open end 16b is formed.
- the insulating plates 19 and 20 are arranged above and below the electrode body 14, and are housed in the outer can 16.
- the negative electrode lead 22 is welded to the bottom of the outer can 16, and the grooved portion 23 is formed on the side surface of the outer can 16 by pressing.
- the sealing body 17 is welded to the positive electrode lead 21, and an appropriate amount of non-aqueous electrolyte is injected into the outer can 16.
- the gasket 18 and the sealing body 17 are housed in the upper part of the grooved portion 23, and the side surface of the outer can 16 is spun from the outside to form an annular protruding portion 16a along the circumferential direction of the outer can 16.
- the sealing body 17 is caulked and fixed inward in the radial direction by the protruding portion 16a via the gasket 18, and a cylindrical battery is manufactured.
- the open end portion 16b of the outer can 16 extends outward in the radial direction, and the sealing body 17 is caulked and fixed in the radial direction by the protruding portion 16a.
- the connection area of the external lead at the open end 16b can be sufficiently secured, so that the stability and work of the connection between the outer can and the external lead when modularizing the cylindrical battery 10 can be obtained. Improves sex.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (4)
- 正極及び負極を含む電極体と、
前記電極体を収容し、前記正極及び前記負極のいずれか一方と接続される有底円筒状の外装缶と、
前記正極及び前記負極の他方と接続される封口体とを備え、
前記外装缶は、側面が径方向内側に突出した突出部を有し、且つ、開口端部が径方向外側に延出し、
前記封口体は、ガスケットを介して前記突出部により径方向内側にかしめ固定されている、円筒形電池。 - 前記開口端部は、前記外装缶の全周に形成されている、請求項1に記載の円筒形電池。
- 前記開口端部は、前記外装缶の周方向の一部に1つ又は複数形成されている、請求項1に記載の円筒形電池。
- 前記開口端部に接合された導電部材をさらに備える、請求項1~3のいずれか1項に記載の円筒形電池。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21894590.5A EP4250441A1 (en) | 2020-11-19 | 2021-11-15 | Cylindrical battery |
CN202180076554.8A CN116529935A (zh) | 2020-11-19 | 2021-11-15 | 圆筒形电池 |
US18/036,462 US20240014473A1 (en) | 2020-11-19 | 2021-11-15 | Cylindrical battery |
JP2022563737A JPWO2022107716A1 (ja) | 2020-11-19 | 2021-11-15 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020192289 | 2020-11-19 | ||
JP2020-192289 | 2020-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022107716A1 true WO2022107716A1 (ja) | 2022-05-27 |
Family
ID=81708893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/041872 WO2022107716A1 (ja) | 2020-11-19 | 2021-11-15 | 円筒形電池 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240014473A1 (ja) |
EP (1) | EP4250441A1 (ja) |
JP (1) | JPWO2022107716A1 (ja) |
CN (1) | CN116529935A (ja) |
WO (1) | WO2022107716A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008192321A (ja) * | 2007-01-31 | 2008-08-21 | Sanyo Electric Co Ltd | 円筒型蓄電池およびその製造方法 |
JP2009152031A (ja) | 2007-12-20 | 2009-07-09 | Panasonic Corp | 円筒形電池 |
JP2010512638A (ja) | 2006-12-11 | 2010-04-22 | エルジー・ケム・リミテッド | 安全性を高めた折り曲げ形状のリチウムイオンバッテリー |
WO2019194253A1 (ja) * | 2018-04-06 | 2019-10-10 | 三洋電機株式会社 | 電池 |
WO2020111275A1 (ja) * | 2018-11-30 | 2020-06-04 | パナソニックIpマネジメント株式会社 | 電池 |
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JP2010512638A (ja) | 2006-12-11 | 2010-04-22 | エルジー・ケム・リミテッド | 安全性を高めた折り曲げ形状のリチウムイオンバッテリー |
JP2008192321A (ja) * | 2007-01-31 | 2008-08-21 | Sanyo Electric Co Ltd | 円筒型蓄電池およびその製造方法 |
JP2009152031A (ja) | 2007-12-20 | 2009-07-09 | Panasonic Corp | 円筒形電池 |
WO2019194253A1 (ja) * | 2018-04-06 | 2019-10-10 | 三洋電機株式会社 | 電池 |
WO2020111275A1 (ja) * | 2018-11-30 | 2020-06-04 | パナソニックIpマネジメント株式会社 | 電池 |
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CN116529935A (zh) | 2023-08-01 |
US20240014473A1 (en) | 2024-01-11 |
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