US 12,451,557 B2
Gas removing device and method for removing gas from a pouch type case of a secondary battery
Sang Jih Kim, Daejeon (KR); Joon Sung Bae, Daejeon (KR); Eui Kyung Lee, Daejeon (KR); Suk Hyun Hong, Daejeon (KR); Beom Koon Lee, Daejeon (KR); and Dong Hun Bae, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/792,831
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Sep. 16, 2021, PCT No. PCT/KR2021/012721
§ 371(c)(1), (2) Date Jul. 14, 2022,
PCT Pub. No. WO2022/065808, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 10-2020-0125156 (KR), filed on Sep. 25, 2020; and application No. 10-2021-0123701 (KR), filed on Sep. 16, 2021.
Prior Publication US 2023/0045436 A1, Feb. 9, 2023
Int. Cl. H01M 50/317 (2021.01); H01M 50/308 (2021.01); H01M 50/358 (2021.01)
CPC H01M 50/317 (2021.01) [H01M 50/308 (2021.01); H01M 50/358 (2021.01); Y02E 60/10 (2013.01); Y02P 70/50 (2015.11)] 12 Claims
OG exemplary drawing
 
1. A gas removing device, which removes a gas generated inside a pouch, in which an electrode assembly is accommodated, the gas removing device comprising:
a pair of vacuum tubes configured to symmetrically press opposing surfaces of a pouch so as to form a vacuum surface, which is in a vacuum state, on the pouch;
a heating member provided on a pressing surface of each of the pair of vacuum tubes, which presses the pouch, is configured to seal only a portion of an edge of the vacuum surface so as to form a sealed part and an unsealed part;
a cutting member configured to cut the vacuum surface of the pouch and form a cutoff hole;
a gas discharging member configured to discharge a gas from inside the pouch to outside the pouch through the unsealed part, the cutoff hole, and the pair of vacuum tubes, wherein each heating member includes two or more of the heating members such that the sealed part includes two or more of the sealed parts and the unsealed part includes two or more of the unsealed parts on the edge of the vacuum surface, and
an insulator configured to block heat of the heating member so as not to be transferred to the unsealed part is provided on the pressing surface of each vacuum tube disposed between the two or more of the heating members of each heating member.