# US 12,183,955 B2 · Sealing structure for battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,955 B2 - Document ID: US12183955B2 - Status: Granted - Kind: B2 - Application number: 17/525,575 - Filed: 2021-11-12 - Published: 2022-03-03 - Granted: 2024-12-31 - Earliest claimed: 2019-05-13 - Assignees: Daikin Industries, Ltd. - Applicants: Daikin Industries, Ltd. - Inventors: Jihong Liu; Takahisa Aoyama; Hayato Tsuda; Masamichi Sukegawa - Web page: https://patentgrep.com/patent/US12183955B2 ## CPC - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/552: characterised by their shape - H01M 50/148: characterised by their shape - H01M 50/152: for cells having curved cross-section, e.g. round or elliptic (H01M50/15, H01M50/153 take precedence) - H01M 50/172: Arrangements of electric connectors penetrating the casing - H01M 50/179: for cells having curved cross-section, e.g. round or elliptic (H01M50/176, H01M50/181 take precedence) - H01M 50/184: characterised by their shape or structure - H01M 50/188: the sealing members being arranged between the lid and terminal - H01M 50/193: Organic material - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A sealing structure for a battery includes a plate shaped member having a through hole, a polymer molding, and an electrode. The polymer molding has a tube portion provided along an entire edge of the through hole and a base portion provided on the tube portion. The electrode has a column portion disposed on an inner periphery of the tube portion and a plate portion provided on the column portion. A back surface of the plate shaped member contacts a front surface of the base portion. A front surface of the plate portion contacts a back surface of the base portion. The back surface of the plate shaped member has an annular first projection provided around the through hole and projecting toward the base portion. The front surface of the plate portion has an annular second projection provided around the through hole and projecting toward the base portion. ## Claims ### Claim 1 A sealing structure for a battery, the sealing structure comprising: a plate shaped member having a through hole; a polymer molding having a tube portion and a base portion, the tube portion being provided along an entire edge of the through hole, and the base portion being provided on the tube portion; and an electrode having a column portion and a plate portion, the column portion being disposed on an inner periphery of the tube portion, and the plate portion being provided on the column portion, a back surface of the plate shaped member being in contact with a front surface of the base portion of the polymer molding, a front surface of the plate portion of the electrode being in contact with a back surface of the base portion of the polymer molding, the back surface of the plate shaped member having an annular first projection provided around the through hole and projecting toward the base portion of the polymer molding, the front surface of the plate portion of the electrode having an annular second projection provided around the through hole and projecting toward the base portion of the polymer molding, values α and β being expressed by the following formula (1) α=(h1+h2)/H,β=d/H (1), and values α and β satisfying the following formula (2) 0.1 ≦ α ≦ 0 .7 , β ≧ 0 0.7 < α ≦ 1.4 , β ≧ ( 5 ⁢ α - 2 ) / 3 } ( 2 ) where h1 and h2 respectively represent heights of the first and second projections, d represents a distance between the first and second projections, and H represents a thickness of the base portion of the polymer molding. ### Claim 2 (depends on 1) The sealing structure of claim 1, wherein the values α and β satisfy the following formula (3) 0.1 ≦ α ≦ 0 .7 , β ≧ 0.5 0.7 < α ≦ 1. , β ≧ ( 5 ⁢ α - 2 ) / 3 } . ( 3 ) ### Claim 3 (depends on 2) The sealing structure of claim 2, wherein the values α and β satisfy the following formula (4) 0.1≤α≤0.7,β≥1.0 (4). ### Claim 4 (depends on 2) The sealing structure of claim 2, wherein the values α and β satisfy the following formula (5) 0.15≤α≤0.7,β≥0.5 (5). ### Claim 5 (depends on 4) The sealing structure of claim 4, wherein the values α and β satisfy the following formula (6) 0.2≤α≤0.7,0.5≤β≤10 (6). ### Claim 6 (depends on 5) The sealing structure of claim 5, wherein the values α and β satisfy the following formula (7) 0.2≤α≤0.7,1.0≤β≤5 (7). ### Claim 7 (depends on 1) The sealing structure of claim 1, wherein a raw material of the polymer molding is a fluoric resin. ### Claim 8 (depends on 1) The sealing structure of claim 1, wherein the battery is a lithium ion battery. ### Claim 9 (depends on 2) The sealing structure of claim 2, wherein a raw material of the polymer molding is a fluoric resin. ### Claim 10 (depends on 3) The sealing structure of claim 3, wherein a raw material of the polymer molding is a fluoric resin. ### Claim 11 (depends on 4) The sealing structure of claim 4, wherein a raw material of the polymer molding is a fluoric resin. ### Claim 12 (depends on 5) The sealing structure of claim 5, wherein a raw material of the polymer molding is a fluoric resin. ### Claim 13 (depends on 6) The sealing structure of claim 6, wherein a raw material of the polymer molding is a fluoric resin. ### Claim 14 (depends on 2) The sealing structure of claim 2, wherein the battery is a lithium ion battery. ### Claim 15 (depends on 3) The sealing structure of claim 3, wherein the battery is a lithium ion battery. ### Claim 16 (depends on 4) The sealing structure of claim 4, wherein the battery is a lithium ion battery. ### Claim 17 (depends on 5) The sealing structure of claim 5, wherein the battery is a lithium ion battery. ### Claim 18 (depends on 6) The sealing structure of claim 6, wherein the battery is a lithium ion battery. ### Claim 19 (depends on 7) The sealing structure of claim 7, wherein the battery is a lithium ion battery.