US 12,263,536 B2
Secondary battery and method for manufacturing same
Ho Jun Shin, Yongin-si (KR); Sang Won Byun, Yongin-si (KR); and Young Sik Moon, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Appl. No. 17/298,485
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
PCT Filed Jan. 3, 2020, PCT No. PCT/KR2020/000101
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/171372, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 10-2019-0020454 (KR), filed on Feb. 21, 2019.
Prior Publication US 2022/0029253 A1, Jan. 27, 2022
Int. Cl. H01M 50/543 (2021.01); B23K 26/21 (2014.01); H01M 50/103 (2021.01); H01M 50/533 (2021.01); H01M 50/534 (2021.01); H01M 50/536 (2021.01); H01M 50/54 (2021.01)
CPC B23K 26/21 (2015.10) [H01M 50/103 (2021.01); H01M 50/533 (2021.01); H01M 50/534 (2021.01); H01M 50/536 (2021.01); H01M 50/54 (2021.01); H01M 50/543 (2021.01)] 17 Claims
OG exemplary drawing
 
1. A secondary battery comprises:
an electrode assembly having an electrode tab;
an auxiliary tab which is a metal single plate mechanically and electrically coupled to the electrode tab; and
a current collecting portion which is mechanically and electrically coupled to the auxiliary tab,
wherein the auxiliary tab comprises:
a tab connection portion welded to the electrode tab;
a current collecting connection portion welded to the current collecting portion and disposed parallel to the tab connection portion; and
a bending portion which connects between the tab connection portion and the current collecting connection portion and is on one side of the current collecting portion,
wherein the auxiliary tab has an exterior surface facing away from the electrode assembly, and the electrode tab is on the exterior surface.