WO2023119793A1 - コイン形電池 - Google Patents

コイン形電池 Download PDF

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Publication number
WO2023119793A1
WO2023119793A1 PCT/JP2022/037365 JP2022037365W WO2023119793A1 WO 2023119793 A1 WO2023119793 A1 WO 2023119793A1 JP 2022037365 W JP2022037365 W JP 2022037365W WO 2023119793 A1 WO2023119793 A1 WO 2023119793A1
Authority
WO
WIPO (PCT)
Prior art keywords
gasket
wall
bottom plate
coin
wall portion
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/JP2022/037365
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
正雄 大塚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2023569077A priority Critical patent/JP7724430B2/ja
Priority to CN202280081782.9A priority patent/CN118402123A/zh
Priority to US18/718,481 priority patent/US20250055084A1/en
Publication of WO2023119793A1 publication Critical patent/WO2023119793A1/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
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin 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
    • H01M50/545—Terminals formed by the casing of the cells
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H01M10/0427—Button cells
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/153—Lids or covers characterised by their shape for button or coin 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
    • H01M50/10—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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides 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

  • the present disclosure relates to coin batteries.
  • Patent Document 1 Conventionally, there is known a coin-shaped battery that includes a power generation element and an exterior body that hermetically houses the power generation element (for example, Patent Document 1).
  • the outer package of the coin-shaped battery of Patent Document 1 has a sealing plate, a bottomed cylindrical case, and a gasket interposed between the sealing plate and the case.
  • compression ratios are specified at a plurality of locations of the gasket.
  • one object of the present disclosure is to increase the internal space of the coin battery.
  • the coin-shaped battery includes a power generation element and an exterior body that hermetically houses the power generation element.
  • the exterior body has a bottom plate portion and a side portion rising from the peripheral edge of the bottom plate portion. a case having a surface, a sealing plate having a top plate portion and a peripheral edge portion extending from the top plate portion to the inside of the side portion, the sealing plate having an outer surface having a second terminal surface, and between the side portion and the peripheral edge portion and a gasket interposed by being compressed to a maximum extent, wherein the peripheral edge portion includes a first wall portion extending in a direction from the top plate portion toward the bottom plate portion, and is provided on the outer peripheral side of the first wall portion, a second wall portion extending in a direction from the bottom plate portion toward the top plate portion and compressing the gasket between itself and the side portion; a folded portion connecting the first wall portion and the second wall portion; and a space exists between the first wall and the second wall, and the thickness of the gasket before
  • the internal space of the coin-shaped battery can be increased.
  • FIG. 1 is a cross-sectional view showing essential parts of a coin-shaped battery according to one embodiment of the present disclosure.
  • FIG. 2 is a cross-sectional view for explaining the dimensions of each part of the coin-shaped battery.
  • FIG. 3 is a plan view of a coin-shaped battery.
  • a coin-shaped battery according to the present disclosure includes a power generation element and an exterior body. Note that the coin-shaped battery according to the present disclosure also includes a button-shaped battery.
  • a coin cell battery may be, for example, a primary battery such as a lithium primary battery, or a secondary battery such as a lithium ion battery or a lithium metal battery.
  • the power generation element has a first electrode (eg, positive electrode), a second electrode (eg, negative electrode), a separator interposed therebetween, and an electrolytic solution.
  • the exterior body hermetically accommodates the power generating elements.
  • the exterior body has a case, a sealing plate, and a gasket.
  • the exterior body may hermetically house the power generating element with the gasket compressed between the case and the sealing plate.
  • the case and the sealing plate surround and define the inner space of the button-shaped battery.
  • a power generating element is housed in the inner space.
  • the case has a bottom plate portion and side portions rising from the periphery of the bottom plate portion.
  • the bottom plate portion and the side portions may be integral.
  • the bottom plate portion is usually circular around the central axis, but may have a nearly circular shape surrounding the central axis (for example, an elliptical shape).
  • the angle formed by the bottom plate portion and the side portion may be, for example, 85° or more and 95° or less, or may be 90°.
  • the outer surface of the case has a first terminal surface.
  • the first terminal surface may be electrically connected to the first electrode of the power generating element, and may be, for example, a positive terminal surface.
  • the case may be made of, for example, a metal plate such as stainless steel (SUS430, SUS444, SUS329J, etc.), titanium, or a titanium alloy.
  • the sealing plate has a top plate portion and a peripheral portion extending from the top plate portion to the inner side of the side portion.
  • the top plate portion and the peripheral edge portion may be integrated.
  • the shape of the top plate corresponds to the shape of the bottom plate and is generally circular with a diameter smaller than that of the bottom plate.
  • the angle formed by the top plate portion and the peripheral portion may be, for example, 93° or more, or may be 95° or more and 110° or less.
  • the outer surface of the sealing plate has a second terminal surface.
  • the second terminal surface may be electrically connected to the second electrode of the power generating element, and may be, for example, a negative terminal surface.
  • the sealing plate may be made of, for example, a metal plate such as stainless steel (SUS304, SUS316, etc.), ordinary steel, or carbon steel.
  • a metal plate such as stainless steel (SUS304, SUS316, etc.), ordinary steel, or carbon steel.
  • Common steel is steel such as SS material, SM material, and SPCC material defined by JIS.
  • Carbon steels are steels such as S10C, S20C, S30C, S45C, S55C, and belong to alloy steels for machine structures.
  • the gasket is compressed and interposed between the side of the case and the peripheral edge of the sealing plate.
  • Resin materials such as polypropylene (PP), polyphenylene sulfide (PPS), and polyetheretherketone (PEEK) can be used as the gasket material.
  • the peripheral portion of the sealing plate includes a first wall portion, a second wall portion, and a folded portion.
  • the first wall portion, the second wall portion, and the folded portion may be integral.
  • the first wall portion extends from the top plate portion side to the bottom plate portion side.
  • the first wall portion may extend toward the outer peripheral side of the coin-shaped battery as it goes from the top plate portion side to the bottom plate portion side, that is, away from the central axis and away from the internal space.
  • the second wall is provided on the outer peripheral side, that is, farther from the central axis than the first wall.
  • the second wall portion extends from the bottom plate portion side to the top plate portion side.
  • the second wall compresses the gasket between the sides of the case.
  • the second wall may extend along the side.
  • the second wall may extend substantially parallel to the side. That the second wall portion and the side portion extend substantially parallel means that the angle formed by the two is ⁇ 3° or less, and includes the case where the two extend strictly parallel.
  • the folded portion connects the first wall portion and the second wall portion.
  • the folded portion may connect the end portion of the first wall portion on the bottom plate portion side and the end portion of the second wall portion on the bottom plate portion side.
  • the folded portion may be formed between both wall portions in the process of folding the plate to form the first wall portion and the second wall portion.
  • a so-called springback occurs remarkably at the folded portion. Due to this springback, a restoring force is generated that tends to displace the second wall part away from the central axis and toward the side part of the case to the outer peripheral side.
  • a gasket is present on the outer peripheral side of the second wall, and the sides of the case are present on the outside of the gasket. Therefore, the gasket is compressed over a wide range between the second wall portion, which tends to be displaced to the outer peripheral side, and the side portion of the case. Therefore, even with a relatively thin gasket, it can be compressed over a large area to provide a good seal for the coin cell.
  • the thickness of the gasket before compression is less than the thickness of the second wall.
  • the resin gasket will shrink and cause dimensional changes.
  • a gap may occur between the gasket and the sealing plate or the case, resulting in leakage of liquid.
  • the second wall portion follows the dimensional change of the gasket because the springback described above is used. Therefore, even with thin gaskets, gaps are less likely to occur in the coin cell of the present disclosure.
  • the thickness of the first wall portion and the second wall portion may be equal to or less than the thickness of the bottom plate portion and the side portions.
  • the springback mentioned above occurs more remarkably as the thickness of the material becomes smaller. Therefore, by setting the thickness of the first wall portion and the second wall portion to be equal to or less than the thickness of the side portion of the case, a spring generated between the bottom plate portion and the side portion of the case, which is usually formed by bending a plate material, is reduced.
  • the effect of springback generated between the first wall portion and the second wall portion can be increased more than the back. If the latter springback effect is large, the gasket is compressed more strongly between the second wall and the side. Therefore, the sealing structure of the coin-shaped battery can be made even more excellent.
  • the outer surface curvature radius of the folded portion may be larger than the outer surface curvature radius of the bent portion between the bottom plate portion and the side portion.
  • the springback described above occurs more remarkably as the radius of curvature of the bent portion of the material (for example, the radius of curvature of the outer surface) increases. Therefore, by making the radius of curvature of the outer surface of the folded portion larger than the radius of curvature of the folded portion, the effect of the springback generated at the folded portion can be made greater than the springback generated at the folded portion. If the latter springback effect is large, the gasket is compressed more strongly between the second wall and the side. Therefore, the sealing structure of the coin-shaped battery can be made even more excellent.
  • the angle formed by the first wall and the second wall may be 3° or more and 20° or less. By setting the angle to 3° or more, the effect of springback generated at the folded portion can be sufficiently increased. Further, by setting the angle to 20° or less, it is possible to prevent the sealing structure from becoming excessively large, and to ensure a sufficiently large internal space of the coin-shaped battery.
  • the said angle may be 5 degrees or more and 20 degrees or less. By setting the angle to 5° or more, the effect of springback generated at the folded portion can be further enhanced.
  • H1 is the distance in the height direction between the outer main surface of the bottom plate portion and the outer main surface of the top plate portion, and the height direction length of the region of the gasket compressed by the side portion and the second wall portion Assuming that the height is L1, H1 ⁇ 0.4 ⁇ L1 ⁇ H1 ⁇ 0.8 may hold.
  • the height direction refers to a direction perpendicular to the main surface of the bottom plate portion of the case.
  • a region of the gasket compressed between the side portion and the second wall portion may correspond to a region where the side portion and the second wall portion extend substantially parallel.
  • the tip of the side portion may be bent toward the inner peripheral side, that is, toward the central axis, and may compress the gasket with the second wall portion. According to this configuration, the gasket is also compressed between the tip portion of the side portion and the second wall portion, so that the sealing structure of the coin-shaped battery can be further improved. Moreover, since the second wall portion is pressed by the tip portion of the side portion, it is possible to prevent the sealing plate from coming off from the case, for example, when the internal pressure of the coin-shaped battery rises.
  • the compression ratio of the gasket between the second wall portion and the side portion may be smaller than the compression ratio of the gasket between the tip portion of the side portion and the second wall portion.
  • the compressibility of the gasket between the second wall portion and the side portion may be, for example, 0.3 or more and 0.4 or less.
  • the compression rate of the gasket between the tip of the side portion and the second wall portion may be, for example, 0.5 or more and 0.6 or less.
  • the gasket may be compressed between the folded portion and the bottom plate portion.
  • the compressibility of the gasket between the second wall portion and the side portion may be less than the compressibility of the gasket between the folded portion and the bottom plate portion.
  • the compressibility of the gasket between the second wall portion and the side portion may be, for example, 0.3 or more and 0.4 or less.
  • the compression rate of the gasket between the folded portion and the bottom plate portion may be, for example, 0.5 or more and 0.6 or less.
  • the internal space of the coin-shaped battery can be increased by using a thin gasket. Further, according to the present disclosure, it is possible to take advantage of such large internal space to increase the capacity of coin cell batteries.
  • the coin-shaped battery 10 of this embodiment includes a power generation element 20 and an exterior body 30 .
  • 1 and 2 show a cross section of the coin cell battery 10 shown in FIG. 3 along line II.
  • the power generating element 20 has a positive electrode 21, a negative electrode 22, a separator 23 interposed therebetween, and an electrolytic solution.
  • the positive electrode 21 and the negative electrode 22 are each pellet-shaped.
  • the separator 23 is made of a porous material such as non-woven fabric.
  • the exterior body 30 hermetically accommodates the power generation element 20 in the internal space 30s.
  • the exterior body 30 has a case 31 , a sealing plate 36 and a gasket 41 .
  • the exterior body 30 hermetically accommodates the power generating element 20 with the gasket 41 compressed between the case 31 and the sealing plate 36 .
  • the case 31 has a bottom plate portion 32 and side portions 33 rising from the periphery of the bottom plate portion 32 .
  • the bottom plate portion 32 has a circular shape centered on the central axis 10c.
  • the bottom plate portion 32 and the side portion 33 are integrated.
  • a bent portion 34 is formed between the bottom plate portion 32 and the side portion 33 .
  • a tip portion 33a of the side portion 33 is bent inward toward the central axis 10c.
  • the outer surface of case 31 has a first terminal surface 35 .
  • the first terminal surface 35 is electrically connected to the positive electrode 21 of the power generating element 20 and functions as the positive terminal surface of the coin battery 10 .
  • Case 31 is made of stainless steel.
  • the bottom plate portion 32 has an outer main surface 32s1 forming part of the terminal surface 35 and an inner main surface 32s2 opposite to the outer main surface 32s1.
  • the bottom plate portion 32 and the side portions 33 surround and define the case internal space 31v.
  • the sealing plate 36 has a top plate portion 37 and a peripheral edge portion 38 extending from the top plate portion 37 to the inside of the side portion 33 of the case 31 .
  • the top plate portion 37 has a circular shape centered on the central axis 10c.
  • a peripheral edge portion 38 of the sealing plate 36 is closer to the central axis 10 c than the side portion 33 of the case 31 .
  • the top plate portion 37 and the peripheral portion 38 are integrated.
  • the outer surface of the sealing plate 36 has a second terminal surface 39 .
  • the second terminal surface 39 is electrically connected to the negative electrode 22 of the power generating element 20 and functions as the negative terminal surface of the coin battery 10 .
  • the sealing plate 36 is made of stainless steel.
  • the top plate portion 37 has an outer main surface 37s1 forming part of the terminal surface 39 and an inner main surface 37s2 opposite to the outer main surface 37s1.
  • the top plate portion 37 and the peripheral edge portion 38 surround and demarcate the internal space 30s.
  • the peripheral portion 38 extends inside the side portion 33, that is, into the case internal space 31v.
  • the gasket 41 is compressed and interposed between the side portion 33 of the case 31 and the peripheral edge portion 38 of the sealing plate 36 .
  • Gasket 41 is made of polypropylene.
  • the gasket 41 is compressed between the tip portion 33a of the side portion 33 and the second wall portion 38b (described later).
  • the gasket 41 is compressed between the bottom plate portion 32 and a folded portion 38c (described later).
  • the peripheral edge portion 38 of the sealing plate 36 includes a first wall portion 38a, a second wall portion 38b, and a folded portion 38c.
  • the first wall portion 38a, the second wall portion 38b, and the folded portion 38c are integrated.
  • the first wall portion 38 a extends from the top plate portion 37 side to the bottom plate portion 32 side, that is, in the direction from the top plate portion 37 to the bottom plate portion 32 .
  • the first wall portion 38 a extends from the top plate portion 37 toward the bottom plate portion 32 toward the side portion 33 of the case 31 away from the outer peripheral side of the coin battery 10 , that is, from the central axis 10 c.
  • the first wall portion 38a has an end portion 38at connected to the top plate portion 37 and an end portion 38ab opposite to the end portion 38at.
  • the first wall portion 38a extends linearly from a connection point (end portion 38at) with the top plate portion 37 to a connection point (end portion 38ab) with the folded portion 38c. In other words, the first wall portion 38a does not have a step-like shape in its middle portion.
  • the second wall portion 38b is provided between the first wall portion 38a and the side portion 33 of the case 31 on the outer peripheral side, that is, farther from the central axis 10c than the first wall portion 38a.
  • the second wall portion 38 b extends from the bottom plate portion 32 side to the top plate portion 37 side, that is, in a direction from the bottom plate portion 32 toward the top plate portion 37 .
  • the second wall portion 38 b compresses the gasket 41 with the side portion 33 of the case 31 .
  • the second wall portion 38 b extends substantially parallel to the side portion 33 of the case 31 .
  • the folded portion 38c connects the first wall portion 38a and the second wall portion 38b.
  • the second wall portion 38b has an end portion 38bb connected to the folded portion 38c and an end portion 38bt opposite to the end portion 38bb. More specifically, the folded portion 38c connects an end portion 38at of the first wall portion 38a on the bottom plate portion 32 side and an end portion 38bt of the second wall portion 38b on the bottom plate portion 32 side.
  • the folded portion 38c is formed between the first wall portion 38a and the second wall portion 38b in the process of folding the plate material.
  • the above-described springback remarkably occurs in the folded portion 38c.
  • This springback sufficiently compresses the gasket 41 over a wide area between the second wall portion 38 b and the side portion 33 . Accordingly, it is possible to use a relatively thin gasket 41 to achieve a sealed structure for the coin-shaped battery 10 .
  • the thickness of the gasket 41 of this embodiment before compression is smaller than the thickness t1 (see FIG. 2) of the second wall portion 38b.
  • the compression ratio of the gasket 41 between the second wall portion 38b and the side portion 33 is smaller than the compression ratio of the gasket 41 between the tip portion 33a of the side portion 33 and the second wall portion 38b.
  • the former compression rate is, for example, 0.3 or more and 0.4 or less.
  • the latter compression rate is, for example, 0.4 or more and 0.6 or less.
  • the compression ratio of the gasket 41 between the second wall portion 38b and the side portion 33 is smaller than the compression ratio of the gasket 41 between the folded portion 38c and the bottom plate portion 32.
  • the former compression rate is, for example, 0.3 or more and 0.4 or less.
  • the latter compression rate is, for example, 0.4 or more and 0.6 or less.
  • the thickness t1 of the first wall portion 38a and the second wall portion 38b is equal to or less than the thickness t2 of the bottom plate portion 32 and the side portion 33.
  • the thickness t1 and the thickness t2 are equal to each other, but are not limited to this.
  • thickness t1 may be less than thickness t2.
  • t1 ⁇ 2>t2 holds.
  • the outer surface curvature radius R1 of the folded portion 38c is larger than the outer surface curvature radius R2 of the bent portion 34 .
  • the angle ⁇ between the first wall portion 38a and the second wall portion 38b is 3° or more and 20° or less.
  • the angle ⁇ is 5° or more and 20° or less, and more preferably, the angle ⁇ is 5° or more and 10° or less.
  • H1 be the distance in the height direction between the outer main surface 32s1 of the bottom plate portion 32 and the outer main surface 37s1 of the top plate portion 37 (that is, the height dimension of the coin-shaped battery 10), and the side portion of the gasket 41 Assuming that the length in the height direction of the compressed region between 33 and the second wall portion 38b is L1, H1 ⁇ 0.4 ⁇ L1 ⁇ H1 ⁇ 0.8 holds. Preferably, H1 ⁇ 0.65 ⁇ L1 ⁇ H1 ⁇ 0.75.
  • the present disclosure can be used for coin batteries.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
PCT/JP2022/037365 2021-12-24 2022-10-06 コイン形電池 Ceased WO2023119793A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2023569077A JP7724430B2 (ja) 2021-12-24 2022-10-06 コイン形電池
CN202280081782.9A CN118402123A (zh) 2021-12-24 2022-10-06 硬币形电池
US18/718,481 US20250055084A1 (en) 2021-12-24 2022-10-06 Coin-shaped battery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021211359 2021-12-24
JP2021-211359 2021-12-24

Publications (1)

Publication Number Publication Date
WO2023119793A1 true WO2023119793A1 (ja) 2023-06-29

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PCT/JP2022/037365 Ceased WO2023119793A1 (ja) 2021-12-24 2022-10-06 コイン形電池

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US (1) US20250055084A1 (https=)
JP (1) JP7724430B2 (https=)
CN (1) CN118402123A (https=)
WO (1) WO2023119793A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918030U (https=) * 1972-05-18 1974-02-15
JP2001143958A (ja) * 1999-11-11 2001-05-25 Nok Corp 電子部品の封口方法
JP2003045382A (ja) * 2001-07-27 2003-02-14 Sii Micro Parts Ltd リフローはんだ付け実装可能な電気化学セル
JP2005123017A (ja) * 2003-10-16 2005-05-12 Sii Micro Parts Ltd 電気化学セル用ガスケット及び電気化学セル
JP2012069455A (ja) * 2010-09-27 2012-04-05 Panasonic Corp コイン形電池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918030U (https=) * 1972-05-18 1974-02-15
JP2001143958A (ja) * 1999-11-11 2001-05-25 Nok Corp 電子部品の封口方法
JP2003045382A (ja) * 2001-07-27 2003-02-14 Sii Micro Parts Ltd リフローはんだ付け実装可能な電気化学セル
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