# US 12,224,459 B2 · Button cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,459 B2 - Document ID: US12224459B2 - Status: Granted - Kind: B2 - Application number: 17/202,881 - Filed: 2021-03-16 - Published: 2021-12-23 - Granted: 2025-02-11 - Earliest claimed: 2020-06-17 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Heejung Ko; Kijung Kim; Yongjin Park; Byongchul Woo; Jong-Ha Lee - Web page: https://patentgrep.com/patent/US12224459B2 ## CPC - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - H01M 50/547: characterised by the disposition of the terminals on the cells - H01M 10/0427: {Button cells} - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 50/109: of button or coin shape - H01M 50/152: for cells having curved cross-section, e.g. round or elliptic (H01M50/15, H01M50/153 take precedence) - H01M 50/153: for button or coin cells - H01M 50/154: {Lid or cover comprising an axial bore for receiving a central current collector} - H01M 50/179: for cells having curved cross-section, e.g. round or elliptic (H01M50/176, H01M50/181 take precedence) - H01M 50/181: for button or coin cells - H01M 50/533: characterised by the shape of the leads or tabs - H01M 50/559: Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells (H01M50/553 takes precedence) - H01M 50/566: by welding, soldering or brazing - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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 - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A rechargeable battery includes: a case receiving an electrode assembly and including an opening; a cap assembly including a cap plate coupled to the case and covering the opening, and a terminal plate coupled to the cap plate; and a housing covering the cap plate and coupled to the case, and an outer surface of the terminal plate protrudes more than an outer surface of the housing to have a height difference. ## Claims ### Claim 1 A button cell comprising: a case receiving an electrode assembly and comprising an opening; a cap assembly comprising a cap plate coupled to and electrically connected to the case and covering the opening, and a terminal plate coupled to the cap plate; and a housing covering the cap plate and coupled to the case, wherein the terminal plate protrudes through a terminal hole of the cap plate such that an outer surface of the terminal plate protrudes more than an outer surface of the housing to have a height difference, and the cap plate and the terminal plate are thermally fused with a thermal-fusion member therebetween and are electrically insulated from each other, the thermal-fusion member being spaced outside the terminal hole of the cap plate so as not to overlap the terminal hole. ### Claim 2 (depends on 1) The button cell of claim 1, wherein the electrode assembly comprises a first electrode, a second electrode, and a separator therebetween, the case is connected to the first electrode by a first electrode tab, and the terminal plate is connected to the second electrode by a second electrode tab. ### Claim 3 (depends on 2) The button cell of claim 2, wherein the terminal plate comprises: a flange part located between the cap plate and the electrode assembly and electrically insulated and attached to an inner surface of the cap plate; and a protruded terminal protruded from a center of the flange part to the outside, penetrating the terminal hole of the cap plate and a through hole of the housing, and electrically connected to the second electrode tab by an inner surface of the terminal plate, and the protruded terminal protrudes more than the outer surface of the housing by a first height difference to form an outer surface of the button cell. ### Claim 4 (depends on 3) The button cell of claim 3, wherein the housing comprises: a planar part that covers an outer surface of the cap plate; and a side part extending along a side of the case at an outside of the planar part to cover a part of the side of the case and be coupled to the side of the case. ### Claim 5 (depends on 4) The button cell of claim 4, wherein the housing is formed of an electrically insulating material. ### Claim 6 (depends on 5) The button cell of claim 5, wherein the through hole of the housing is concentric with the terminal hole of the cap plate, and an interior diameter of the through hole of the housing is larger than an exterior diameter of the protruded terminal. ### Claim 7 (depends on 4) The button cell of claim 4, wherein an interior diameter of the case is larger than a sum of an exterior diameter of the protruded terminal and two times a diameter direction distance of the planar part set on both sides in a diameter direction of the protruded terminal. ### Claim 8 (depends on 5) The button cell of claim 5, wherein the housing comprises PP, PE, PET, a PEN resin, or rubber. ### Claim 9 (depends on 2) The button cell of claim 2, wherein the terminal plate comprises: a flange part on an outer surface of the cap plate and electrically insulated and attached to the outer surface of the cap plate; and a tab connection part protruded from a center of the flange part to the inside and protruded toward the electrode assembly through a through hole of the housing and the terminal hole of the cap plate, and electrically connected to the second electrode tab by an inner surface of the terminal plate, and the flange part protrudes more than the outer surface of the housing by a second height difference to form an outer surface of the button cell. ### Claim 10 (depends on 9) The button cell of claim 9, wherein the housing comprises: a planar part comprising a through hole having a larger interior diameter than an exterior diameter of the flange part to cover an exposed surface of the cap plate while exposing the flange part; and a side part extending along a side of the case at an outside of the planar part to cover a part of the side of the case and to be joined to the side of the case. ### Claim 11 (depends on 10) The button cell of claim 10, wherein an interior diameter of the case is larger than a sum of an exterior diameter of the flange part and two times a diameter direction distance of the planar part set on both sides in a diameter direction of the flange part. ### Claim 12 (depends on 1) The button cell of claim 1, wherein the housing forms a step on a side of the case. ### Claim 13 (depends on 1) The button cell of claim 1, wherein the case sets a first diameter in a diameter direction at a lower part of the case, and the housing is coupled to an upper part of the case and sets a second diameter larger than the first diameter in the diameter direction.