US 12,482,881 B2
Pouch-type secondary battery and battery module having the same
Se Young Oh, Daejeon (KR); Jeong Min Ha, Daejeon (KR); Sin Woong Kim, Daejeon (KR); Geun Hee Kim, Daejeon (KR); Hyun Beom Kim, Daejeon (KR); and Hyung Ho Kwon, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Jan. 7, 2022, as Appl. No. 17/570,799.
Claims priority of application No. 10-2021-0041419 (KR), filed on Mar. 30, 2021.
Prior Publication US 2022/0320635 A1, Oct. 6, 2022
Int. Cl. H01M 50/105 (2021.01); C22C 21/00 (2006.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01M 10/647 (2014.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/129 (2021.01); H01M 50/184 (2021.01); H01M 50/211 (2021.01); H01M 50/249 (2021.01)
CPC H01M 50/105 (2021.01) [C22C 21/00 (2013.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/647 (2015.04); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/129 (2021.01); H01M 50/184 (2021.01); H01M 50/211 (2021.01); H01M 50/249 (2021.01); H01M 2220/20 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pouch-type secondary battery comprising:
an electrode assembly including positive electrodes and negative electrodes alternately stacked with separators therebetween; and
a pouch including a pair of cases integrally connected to each other at a folding portion and a terrace including an expansion portion opposite the folding portion and a pair of sides connecting the folding portion to the expansion portion, wherein the electrode tabs are arranged to protrude from the pair of sides, the pouch including walls defining a perimeter of an accommodation portion for accommodating the electrode assembly, the walls comprising:
a folding portion-side outer wall comprising the folding portion; and
a sealing portion-side outer wall connected to a sealing portion of one side of the pair of sides, wherein the sealing portion includes at least a portion of the pair of cases fused together,
wherein ends of the negative electrodes are spaced from the folding portion-side outer wall, and
wherein an average distance between the ends of the negative electrodes and the folding portion-side outer wall is in a range from 0.22 mm to 0.8 mm,
wherein the accommodation portion comprises:
a first rounded edge connecting a top or bottom surface of the accommodation portion to the folding portion-side outer wall;
a second rounded edge connecting the top or the bottom surface of the accommodation portion to the sealing portion-side outer wall;
a third rounded edge connecting the folding portion-side outer wall to the sealing portion-side outer wall; and
a corner to which the first rounded edge, the second rounded edge, and the third rounded edge are connected,
wherein a radius of curvature of the third rounded edge is greater than a radius of curvature of the first rounded edge and a radius of curvature of the second rounded edge, and
wherein a maximum distance between the ends of the negative electrodes and the folding portion-side outer wall is approximately equal to or less than 0.8 mm.