US 12,230,750 B2
Button-type secondary battery
Min Su Cho, Daejeon (KR); Joo Hwan Sung, Daejeon (KR); Yong Gon Lee, Daejeon (KR); Je Jun Lee, Daejeon (KR); Jae Won Lim, Daejeon (KR); Geon Woo Min, Daejeon (KR); Min Gyu Kim, Daejeon (KR); and Sang Hak Chae, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/796,621
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Sep. 8, 2021, PCT No. PCT/KR2021/012207
§ 371(c)(1), (2) Date Jul. 29, 2022,
PCT Pub. No. WO2022/059997, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 10-2020-0118627 (KR), filed on Sep. 15, 2020; and application No. 10-2021-0112633 (KR), filed on Aug. 25, 2021.
Prior Publication US 2023/0062173 A1, Mar. 2, 2023
Int. Cl. H01M 10/00 (2006.01); H01M 10/04 (2006.01); H01M 50/109 (2021.01); H01M 50/186 (2021.01)
CPC H01M 10/0427 (2013.01) [H01M 50/109 (2021.01); H01M 50/186 (2021.01)] 13 Claims
OG exemplary drawing
 
1. A button-type secondary battery comprising:
an electrode assembly;
a lower can configured to accommodate the electrode assembly therein;
an upper can coupled to an opening of the lower can;
a gasket configured to insulate a coupling portion between the lower can and the upper can; and
a center part at a core portion of the electrode assembly,
wherein the center part comprises:
a center pin inserted into the core portion of the electrode assembly; and
an upper plate with an upper cover surface provided on an upper end of the center pin to protect an upper portion of the electrode assembly,
wherein an edge of the upper cover surface is supported on an inner wall of the lower can.