US 11,742,541 B2
Secondary battery
Ki Youn Kim, Daejeon (KR); Jee Ho Kim, Daejeon (KR); Myung Hoon Ko, Daejeon (KR); Jung Il Park, Daejeon (KR); Yong Tae Lee, Daejeon (KR); and Gyung Soo Kang, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 17/281,792
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Oct. 1, 2019, PCT No. PCT/KR2019/012792
§ 371(c)(1), (2) Date Mar. 31, 2021,
PCT Pub. No. WO2020/071719, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 10-2018-0118868 (KR), filed on Oct. 5, 2018.
Prior Publication US 2021/0391615 A1, Dec. 16, 2021
Int. Cl. H01M 50/107 (2021.01); H01M 50/548 (2021.01); H01M 50/545 (2021.01); H01M 50/119 (2021.01); H01M 50/193 (2021.01); H01M 10/04 (2006.01); H01M 10/0587 (2010.01); H01M 50/10 (2021.01)
CPC H01M 50/107 (2021.01) [H01M 10/0422 (2013.01); H01M 10/0431 (2013.01); H01M 10/0587 (2013.01); H01M 50/10 (2021.01); H01M 50/119 (2021.01); H01M 50/193 (2021.01); H01M 50/545 (2021.01); H01M 50/548 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
an electrode assembly in which a first electrode, a separator, and a second electrode are alternately stacked and wound together;
a can having an accommodation part that receives the electrode assembly therein, the can comprising a first can and a second can each having a cylindrical shape elongated along a longitudinal axis of the can, wherein the first can has a second side having a first opening that is open in a second direction along the longitudinal axis, and the first can has a first side having a first connection part that is closed in a first direction along the longitudinal axis, the first direction being opposite the second direction, wherein the second can is received within the first can so as to define an overlapping portion between the first can and the second can along the longitudinal axis, wherein a length of the overlapping portion along the longitudinal axis is greater than a diameter of each of the first can and the second can, and wherein the first opening of the first can is larger than an outer circumferential surface of the second can; and
an insulator configured to insulate the overlapping portion between the first can and the second can,
wherein the first can forms a first electrode terminal that directly contacts an end of the first electrode, and
the second can forms a second electrode terminal that directly contacts an end of the second electrode.