US 12,431,567 B2
Secondary battery and method for manufacturing the same
In Gu An, Daejeon (KR); Ki Woong Kim, Daejeon (KR); Seok Je Kim, Daejeon (KR); Hyoung Sik Choi, Daejeon (KR); and Yun Pyo Oh, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/783,492
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed May 12, 2021, PCT No. PCT/KR2021/005964
§ 371(c)(1), (2) Date Jun. 8, 2022,
PCT Pub. No. WO2021/246674, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 10-2020-0067821 (KR), filed on Jun. 4, 2020.
Prior Publication US 2023/0008194 A1, Jan. 12, 2023
Int. Cl. H01M 50/186 (2021.01); H01M 10/04 (2006.01); H01M 50/105 (2021.01); H01M 50/242 (2021.01)
CPC H01M 50/186 (2021.01) [H01M 10/04 (2013.01); H01M 50/105 (2021.01); H01M 50/242 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
a pouch comprising an accommodation part accommodating an electrode assembly therein, a gas pocket part configured to collect a gas generated in the accommodation part, an edge sealing part provided along each of edge surfaces of the accommodation part and the gas pocket part, and a corner sealing part provided on each of two opposite ends of a boundary between the accommodation part and the gas pocket part, the corner sealing part being configured to support the electrode assembly accommodated in the accommodation part,
wherein the corner sealing part comprises a lateral support surface having one end thereof supported in a lateral direction of the electrode assembly, which faces the gas pocket part, and a longitudinal support surface provided between the lateral support surface and the edge sealing part, having a width in a longitudinal direction of the electrode assembly greater than a width of the lateral support surface in the longitudinal direction, the longitudinal direction being perpendicular to the lateral direction, and having one end thereof supported in the lateral direction of the electrode assembly, which faces the edge sealing part, and
the longitudinal support surface, the lateral support surface, and the edge sealing part are integrally connected to each other,
wherein the longitudinal support surface and the lateral support surface have a same length in the lateral direction of the electrode assembly,
wherein one surface of the lateral support surface, which faces the electrode assembly and is connected to the longitudinal support surface, has a curved groove shape, and
wherein one surface of the longitudinal support surface, which faces the electrode assembly and is connected to the edge sealing part, has a curved groove shape.