US 12,261,308 B2
Button cell
Heejung Ko, Yongin-si (KR); Byongchul Woo, Yongin-si (KR); and Kijung Kim, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Mar. 2, 2021, as Appl. No. 17/189,733.
Claims priority of application No. 10-2020-0078024 (KR), filed on Jun. 25, 2020.
Prior Publication US 2021/0408626 A1, Dec. 30, 2021
Int. Cl. H01M 50/171 (2021.01); H01M 50/566 (2021.01); H01M 50/591 (2021.01); H01M 50/593 (2021.01)
CPC H01M 50/171 (2021.01) [H01M 50/566 (2021.01); H01M 50/591 (2021.01); H01M 50/593 (2021.01)] 11 Claims
OG exemplary drawing
 
1. A button cell comprising:
a case receiving an electrode assembly and comprising an opening;
a cap assembly comprising a cap plate coupled to the case to cover the opening, and a terminal plate thermally fused to the cap plate by a thermal-fusion member, the thermal-fusion member electrically insulating the cap plate and the terminal plate from each other;
a sealing part attached to and located on a side of the thermal-fusion member, a side surface of the terminal plate, and an outer surface of the cap plate; and
a housing coupled to the case and covering the cap plate in a height direction of the button cell, the housing being entirely spaced outside the terminal plate in a diameter direction of the button cell,
wherein, in the diameter direction of the button cell, the sealing part is located entirely inside a through hole of the housing, and
wherein the terminal plate comprises:
a flange part on the cap plate and electrically insulated from and attached to the cap plate; and
a tab connection part protruded from a center of the flange part through a terminal hole of the cap plate and a through hole of the thermal-fusion member and connected to an electrode tab of the electrode assembly at an inner surface of the terminal plate, wherein, in the terminal hole of the cap plate, the tab connection part is spaced apart from the thermal-fusion member.