US 12,407,072 B2
Secondary battery
Mun Sung Kim, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Appl. No. 17/595,068
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
PCT Filed May 19, 2020, PCT No. PCT/KR2020/006547
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2020/235916, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 10-2019-0060097 (KR), filed on May 22, 2019.
Prior Publication US 2022/0200108 A1, Jun. 23, 2022
Int. Cl. H01M 50/538 (2021.01); H01M 10/04 (2006.01); H01M 10/0587 (2010.01); H01M 50/107 (2021.01); H01M 50/30 (2021.01); H01M 50/342 (2021.01); H01M 50/528 (2021.01); H01M 50/533 (2021.01); H01M 10/052 (2010.01); H01M 50/152 (2021.01)
CPC H01M 50/538 (2021.01) [H01M 10/0422 (2013.01); H01M 10/0587 (2013.01); H01M 50/107 (2021.01); H01M 50/342 (2021.01); H01M 50/3425 (2021.01); H01M 50/528 (2021.01); H01M 50/533 (2021.01); H01M 10/052 (2013.01); H01M 50/152 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
a cylindrical can having an opening;
an electrode assembly accommodated in the opening of the cylindrical can and wound in a cylindrical form;
a current collector plate electrically connected to the electrode assembly, wherein the current collector plate further comprises a central through-hole formed in a central region; and
a safety vent electrically connected to the current collector plate and sealing the opening of the cylindrical can,
wherein an electrode tab, which has a flat top surface and a flat bottom surface on an opposite side from the flat top surface and has a thin plate shape whose length direction is perpendicular to a winding axis direction of the electrode assembly, is further interposed between the safety vent and the current collector plate, wherein the flat bottom surface extends over the central through-hole and at least a portion of the flat bottom surface connects to the current collector plate.