US 11,056,739 B2
Pouch-shaped battery case for secondary batteries capable of discharging gas
Soo Ji Hwang, Daejeon (KR); Yong Su Choi, Daejeon (KR); Sang Hun Kim, Daejeon (KR); Hyung Kyun Yu, Daejeon (KR); Na Yoon Kim, Daejeon (KR); Min Hyeong Kang, Daejeon (KR); and Yong Kim, Daejeon (KR)
Assigned to LG Chem, Ltd.
Appl. No. 16/495,615
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 5, 2018, PCT No. PCT/KR2018/007618
§ 371(c)(1), (2) Date Sep. 19, 2019,
PCT Pub. No. WO2019/078449, PCT Pub. Date Apr. 25, 2019.
Claims priority of application No. 10-2017-0134648 (KR), filed on Oct. 17, 2017.
Prior Publication US 2020/0028128 A1, Jan. 23, 2020
Int. Cl. H01M 2/00 (2006.01); H01M 50/103 (2021.01); H01M 50/30 (2021.01); H01M 50/126 (2021.01); H01M 50/197 (2021.01); H01M 50/188 (2021.01)
CPC H01M 50/103 (2021.01) [H01M 50/126 (2021.01); H01M 50/188 (2021.01); H01M 50/197 (2021.01); H01M 50/30 (2021.01)] 11 Claims
OG exemplary drawing
1. A pouch-shaped battery case, comprising:
an electrode assembly mounted within the pouch-shaped battery case;
an outer coating layer, a metal barrier layer, and an inner adhesive layer sequentially stacked with one another;
a first adhesive layer interposed between the outer coating layer and the metal barrier layer in order to increase a force of adhesion therebetween;
a second adhesive layer interposed between the metal barrier layer and the inner adhesive layer in order to increase a force of adhesion therebetween;
an upper case and a lower case sealed to one another by thermal fusion at outer edges thereof, such that the electrode assembly is mounted between the upper case and the lower case; and
a gas discharge member providing gas communication between an inside and an outside of the pouch-shaped battery case, the gas discharge member being disposed within a fused portion of the pouch-shaped battery case that is formed as by the inner adhesive layer of the upper case and the lower case being thermally fused to one another.