US 11,990,637 B2
Secondary battery cell
Jae Sik Shin, Daejeon (KR); Seung Hoon Ju, Daejeon (KR); Ji Yong Park, Daejeon (KR); Jae Gyu Byun, Daejeon (KR); and Gi Jeong Seo, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK ON CO., LTD., Seoul (KR)
Filed on Jun. 12, 2023, as Appl. No. 18/332,750.
Claims priority of application No. 10-2022-0072821 (KR), filed on Jun. 15, 2022; and application No. 10-2023-0043968 (KR), filed on Apr. 4, 2023.
Prior Publication US 2023/0411778 A1, Dec. 21, 2023
Int. Cl. H01M 50/15 (2021.01); H01M 50/103 (2021.01); H01M 50/342 (2021.01)
CPC H01M 50/3425 (2021.01) [H01M 50/103 (2021.01); H01M 50/15 (2021.01)] 14 Claims
OG exemplary drawing
 
1. A secondary battery cell comprising:
a case in which an electrode assembly is accommodated;
a cap plate assembly coupled to at least one side of the case; and
a venting unit including a base facing an interior of the case and a notch portion formed on the base,
wherein the notch portion comprises:
a first notch portion extending in a first direction, parallel to a longitudinal direction of the base;
a second notch portion extending in a second direction, perpendicular to the first direction, from both ends of the first notch portion, respectively; and
a third notch portion extending in the first direction from both ends of the second notch portion respectively,
wherein the third notch portion is configured to concentrate stress in the base and disposed at a peripheral portion of the base.