US 12,463,305 B2
Prismatic secondary battery having improved connection structure in upper case
Cheon Hee Bok, Daejeon (KR); Kyung Hwan Jung, Daejeon (KR); Dong Myung Kim, Daejeon (KR); Hyung Joon Jun, Daejeon (KR); and Sang Pil Woo, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/289,218
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Apr. 4, 2023, PCT No. PCT/KR2023/004509
§ 371(c)(1), (2) Date Nov. 1, 2023,
PCT Pub. No. WO2023/195732, PCT Pub. Date Oct. 12, 2023.
Claims priority of application No. 10-2022-0042009 (KR), filed on Apr. 5, 2022.
Prior Publication US 2024/0250392 A1, Jul. 25, 2024
Int. Cl. H01M 50/566 (2021.01); H01M 10/04 (2006.01); H01M 50/103 (2021.01); H01M 50/15 (2021.01); H01M 50/169 (2021.01); H01M 50/342 (2021.01); H01M 50/538 (2021.01); H01M 50/55 (2021.01)
CPC H01M 50/566 (2021.01) [H01M 10/0431 (2013.01); H01M 50/103 (2021.01); H01M 50/15 (2021.01); H01M 50/169 (2021.01); H01M 50/3425 (2021.01); H01M 50/538 (2021.01); H01M 50/55 (2021.01)] 11 Claims
OG exemplary drawing
 
1. A prismatic secondary battery, comprising:
an electrode assembly comprising a first electrode lead part formed in a first side direction and a second electrode lead part formed in a second side direction opposite the first side direction;
a lower case having an open upper surface and partially open surfaces in the first side and the second side, and housing the electrode assembly therein; and
an upper case covering the open upper surface and the partially open surfaces in the first side and the second side of the lower case,
wherein the upper case comprises:
a top surface covering the open upper surface of the lower case;
four skirts including a pair of side skirts bent from the top surface and extending downwardly;
a first terminal part located on one of the side skirts extending downwardly in the first side direction to cover the partially open surface in the first side of the lower case; and
a second terminal part located on another of the side skirts extending downwardly in the second side direction to cover the partially open surface in the second side of the lower case, and
wherein the first electrode lead part is electrically connected to the first terminal part by welding, and the second electrode lead part is electrically connected to the second terminal part by welding.