US 12,261,320 B2
Battery module with reinforced safety
Sung-Hwan Jang, Daejeon (KR); Myung-Ki Park, Daejeon (KR); Jun-Yeob Seong, Daejeon (KR); Hyoung-Suk Lee, Daejeon (KR); and Hye-Mi Jung, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 18/033,874
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jun. 21, 2022, PCT No. PCT/KR2022/008811
§ 371(c)(1), (2) Date Apr. 26, 2023,
PCT Pub. No. WO2022/270880, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 10-2021-0081116 (KR), filed on Jun. 22, 2021.
Prior Publication US 2023/0411780 A1, Dec. 21, 2023
Int. Cl. H01M 50/358 (2021.01); H01M 50/211 (2021.01)
CPC H01M 50/358 (2021.01) [H01M 50/211 (2021.01); H01M 2220/20 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A battery module, comprising:
a cell assembly having at least one battery cell;
a module case configured to accommodate the cell assembly in an inner space thereof and have a venting hole formed therein to discharge a venting gas generated from the cell assembly, the module case having an upper plate, a lower plate opposite the upper plate, a first side plate and a second side plate spaced from the first side plate, the venting hole formed in the first side plate; and
a vent cover formed separately from and attached to an exterior of the first side plate of the module case and including an outer housing and an inner housing made of different materials, the vent cover being configured such that the venting gas discharged from the venting hole is introduced therein to flow along a surface of the inner housing and is discharged to the outside,
wherein the inner housing is made of a material having a higher melting point than a material of the outer housing; and
wherein the outer housing and the inner housing are made of different metal materials and are at least partially bonded to each other.