# US 12,763,443 B2 · Battery housing and battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,443 B2 - Document ID: US12763443B2 - Status: Granted - Kind: B2 - Application number: 18/497,773 - Filed: 2023-10-30 - Published: 2024-02-22 - Granted: 2026-10-13 - Earliest claimed: 2021-04-30 - Assignees: HeFei Guoyan Xinneng Lithium Industry Co., Ltd. - Applicants: HeFei Guoyan Xinneng Lithium Industry Co., Ltd - Inventors: Fengxue Zhang; Zujian Xia - Web page: https://patentgrep.com/patent/US12763443B2 ## CPC - H01M 50/586: inside the batteries, e.g. incorrect connections of electrodes - H01M 50/109: of button or coin shape - H01M 50/14: for protecting against damage caused by external factors - H01M 50/153: for button or coin cells - H01M 50/159: Metals - H01M 50/16: Organic material - H01M 50/164: having a layered structure - H01M 50/169: by welding, brazing or soldering - H01M 50/593: Spacers; Insulating plates - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract Disclosed are a battery housing and a battery. The battery housing includes a bottom shell and a cover. The cover includes an outer contact layer, an insulating layer, and an inner contact layer. The electrode connecting portion of the inner contact layer is electrically connected to one pole of the battery cell. The other pole of the battery cell is electrically connected to the bottom shell. Since the inner contact layer and the outer contact layer are insulated through the insulating layer, the bottom shell is also insulated from the inner contact layer, thereby preventing the two electrodes of the battery cell from being mutually connected and short-circuited. Since the inner contact layer and the outer contact layer of the cover are pre-insulated, the insulating film is not needed, thereby simplifying the packaging process of the battery and improving the packaging efficiency. ## Claims ### Claim 1 A battery housing for a button battery, comprising: a cup-shaped bottom shell, the cup-shaped bottom shell comprising a circular or oval bottom wall and an annular side wall, and the cup-shaped bottom shell defining a receiving opening; and a cover configured to seal the receiving opening, the cover comprising an outer contact layer, an insulating layer, and an inner contact layer from outside to inside; the inner contact layer comprising an outer electrical connecting portion, an electrode connecting portion, and a conductive bonding portion; the insulating layer comprising an insulating bonding portion and an insulating opening portion; the outer contact layer comprising a welding portion, a welding bonding portion, and a welding opening portion; the side wall comprising a welding support portion close to the receiving opening, wherein a maximum outer diameter of the outer contact layer is D1, a maximum outer diameter of the inner contact layer is D2, and D1 is greater than D2, wherein both D1 and D2 are measured in millimeters (mm); wherein the electrode connecting portion is located on a surface of the inner contact layer facing towards an inner side of the battery housing, the electrode connecting portion is configured to be electrically connected to a pole of a battery cell to enable the inner contact layer to be electrically connected to the battery cell; the outer electrical connecting portion is configured to pass through the insulating opening portion and the welding opening portion to be electrically connected to an outer device; the conductive bonding portion is configured to be seamlessly bonded to the insulating bonding portion, to enhance a strength of the cover and reduce a direct contact area between the insulating bonding portion and an inner side of the battery housing, and to prevent external water from permeating into the battery housing; the welding portion is configured to be welded with the welding supporting portion, thereby enabling the cover and the bottom shell to be sealed; the welding bonding portion is configured to enhance the strength of the cover and prevent external water from permeating into the battery housing; wherein the insulating bonding portion is configured to be seamlessly bonded to the conductive bonding portion and the welding bonding portion by melting an insulating anti-electrolyte corrosion material ay ≥100° C. before the cover and the bottom shell are sealed, the insulating anti-electrolyte corrosion material is one or more selected from polypropylene (PP), a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene (PFA), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), and polyvinyl chloride (PVC), and the insulating anti-electrolyte corrosion material has a thermal shrinkage rate of 6%, and a bonding strength, between the insulating bonding portion and the conductive bonding portion or between the insulating bonding portion and the welding bonding portion, is greater than or equal to 1.0 N per square millimeter after the insulating anti-electrolyte corrosion material is at a room temperature; a thickness of the insulating bonding portion is D3, and D3 is 0.01 mm-2.5 mm; the contact area between the insulating bonding portion and the inner side of the battery housing is S0, and S0 satisfies: S0≥π*D2*D3*½, wherein π is a mathematical constant pi; the outer contact layer is made of stainless steel, and a thickness of the outer contact layer is D4 and D4 is 0.1 mm-0.25 mm; and/or the inner contact layer is made of stainless steel, and a thickness of the inner contact layer is D5 and D5 is 0.1 mm-0.25 mm. ### Claim 2 (depends on 1) The battery housing according to claim 1, wherein the insulating layer is made of one or more of PP, PFA, PVDF, PTFE, ETFE and PVC. ### Claim 3 (depends on 1) The battery housing according to claim 1, wherein a bonding strength between the insulating bonding portion and the conductive bonding portion, or between the insulating bonding portion and the bonding portion, is less than or equal to 5.0 N/mm at a room temperature. ### Claim 4 (depends on 1) The battery housing according to claim 1, wherein an area of the insulating bonding portion is S1, and an area of the insulating layer is S2, and an area of the outer contact layer is S3, and S1, S2, S3 satisfy: S1/S2≥0.6 and/or S1/S3≥0.5. ### Claim 5 (depends on 1) The battery housing according to claim 1, wherein a first bonding enhancement layer is placed on a first surface of the conductive bonding portion close to the insulating bonding portion; the first bonding enhancement layer is configured to reinforce a bonding strength between the insulating bonding portion and the conductive bonding portion; and/or a second bonding enhancement layer is placed on a second surface of the welding bonding portion close to the insulating bonding portion, and the second bonding enhancement layer is configured to reinforce a bonding strength between the insulating bonding portion and the welding bonding portion. ### Claim 6 (depends on 1) The battery housing according to claim 1, wherein the outer electrical connecting portion is located at bottom portions of the insulation opening portion and the welding opening portion. ### Claim 7 (depends on 1) The battery housing according to claim 1, wherein the outer electrical connecting portion protrudes toward an outer side of the battery housing and is configured to sequentially pass through the insulation opening portion and the welding opening portion, and a diameter of the outer connecting portion is less than or equal to a half of the maximum outer diameter of the inner contact layer. ### Claim 8 (depends on 1) The battery housing according to claim 1, wherein the battery housing further comprises a protection member, and the protection member is formed by curing a liquid glue at a room temperature after the cover and the bottom shell are sealed, and the liquid glue is filled in a gap among the outer electrical connecting portion, the insulation opening portion, and the welding opening portion. ### Claim 9 A battery, comprising: a battery cell; and a battery housing, the battery housing comprising a bottom shell and a cover, the bottom shell comprising a bottom wall and an annular side wall, and the bottom shell defining a receiving opening; the cover configured to seal the receiving opening, the cover comprising an outer contact layer, an insulating layer, and an inner contact layer from outside to inside; the inner contact layer comprising an outer electrical connecting portion, an electrode connecting portion, and a conductive bonding portion; the insulating layer comprising an insulating bonding portion and an insulating opening portion; the outer contact layer comprising a welding portion, a welding bonding portion, and a welding opening portion; the side wall comprising a welding support portion close to the receiving opening, wherein a maximum outer diameter of the outer contact layer is D1, a maximum outer diameter of the inner contact layer is D2, and D1 is greater than D2, wherein both D1 and D2 are measured in millimeters (mm); wherein the electrode connecting portion is located on a surface of the inner contact layer facing towards an inner side of the battery housing, the electrode connecting portion is configured to be electrically connected to a pole of a battery cell to enable the inner contact layer to be electrically connected to the battery cell; the outer electrical connecting portion is configured to pass through the insulating opening portion and the welding opening portion to be electrically connected to an outer device; the conductive bonding portion is configured to be seamlessly bonded to the insulating bonding portion, to enhance a strength of the cover and reduce a direct contact area between the insulating bonding portion and an inner side of the battery housing, and to prevent external water from permeating into the battery housing; the welding portion is configured to be welded with the welding supporting portion, thereby enabling the cover and the bottom shell to be sealed; the welding bonding portion is configured to enhance the strength of the cover and prevent external water from permeating into the battery housing; wherein the insulating bonding portion is configured to be seamlessly bonded to the conductive bonding portion and the welding bonding portion by melting an insulating anti-electrolyte corrosion material at ≥100° C. before the cover and the bottom shell are sealed, the insulating anti-electrolyte corrosion material is one or more selected from polypropylene (PP), a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene PFA), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), and polyvinyl chloride (PVC), and the insulating anti-electrolyte corrosion material has a thermal shrinkage rate of 6%, and a bonding strength, between the insulating bonding portion and the conductive bonding portion or between the insulating bonding portion and the welding bonding portion, is greater than or equal to 1.0 N per square millimeter after the insulating anti-electrolyte corrosion material is at a room temperature; a thickness of the insulating bonding portion is D3, and D3 is 0.01 mm-2.5 mm; the contact area between the insulating bonding portion and the inner side of the battery housing is S0, and S0 satisfies: S0≥π*D2*D3*½, wherein π is a mathematical constant pi; the outer contact layer is made of stainless steel, and a thickness of the outer contact layer is D4 and D4 is 0.1 mm-0.25 mm; and/or the inner contact layer is made of stainless steel, and a thickness of the inner contact layer is D5 and D5 is 0.1 mm-0.25 mm. ### Claim 10 (depends on 9) The battery according to claim 9, wherein the insulating layer is made of one or more of PP, PFA, PVDF, PTFE, ETFE and PVC. ### Claim 11 (depends on 9) The battery according to claim 9, wherein a bonding strength between the insulating bonding portion and the conductive bonding portion, or between the insulating bonding portion and the bonding portion, is less than or equal to 5.0 N/mm at a room temperature. ### Claim 12 (depends on 9) The battery according to claim 9, wherein an area of the insulating bonding portion is S1, and an area of the insulating layer is S2, and an area of the outer contact layer is S3, and S1, S2, S3 satisfy: S1/S2≥0.6 and/or S1/S3≥0.5. ### Claim 13 (depends on 9) The battery according to claim 9, wherein a first bonding enhancement layer is placed on a first surface of the conductive bonding portion close to the insulating bonding portion; the first bonding enhancement layer is configured to reinforce a bonding strength between the insulating bonding portion and the conductive bonding portion; and/or a second bonding enhancement layer is placed on a second surface of the welding bonding portion close to the insulating bonding portion, and the second bonding enhancement layer is configured to reinforce a bonding strength between the insulating bonding portion and the welding bonding portion. ### Claim 14 (depends on 9) The battery according to claim 9, wherein the outer electrical connecting portion is located at bottom portions of the insulation opening portion and the welding opening portion. ### Claim 15 (depends on 9) The battery according to claim 9, wherein the outer electrical connecting portion protrudes toward an outer side of the battery housing and is configured to sequentially pass through the insulation opening portion and the welding opening portion, and a diameter of the outer connecting portion is less than or equal to a half of the maximum outer diameter of the inner contact layer. ### Claim 16 (depends on 9) The battery according to claim 9, wherein the battery housing further comprises a protection member, and the protection member is formed by curing a liquid glue at a room temperature after the cover and the bottom shell are sealed, and the liquid glue is filled in a gap among the outer electrical connecting portion, the insulation opening portion, and the welding opening portion.