US 12,469,906 B2
Battery module comprising a fire extinguisher, battery rack comprising same, and power storage device
Young-Seok Lee, Daejeon (KR); Sang-Hyun Jo, Daejeon (KR); Ji-Won Jeong, Daejeon (KR); Kyung-Hyun Bae, Daejeon (KR); and Jin-Kyu Shin, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/609,993
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Nov. 6, 2020, PCT No. PCT/KR2020/015553
§ 371(c)(1), (2) Date Nov. 9, 2021,
PCT Pub. No. WO2021/091329, PCT Pub. Date May 14, 2021.
Claims priority of application No. 10-2019-0142955 (KR), filed on Nov. 8, 2019.
Prior Publication US 2022/0209339 A1, Jun. 30, 2022
Int. Cl. H01M 50/143 (2021.01); H01M 50/211 (2021.01); H01M 50/24 (2021.01)
CPC H01M 50/143 (2021.01) [H01M 50/211 (2021.01); H01M 50/24 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A battery module, comprising:
at least one battery cell;
a module case configured to accommodate the at least one battery cell;
a fire extinguisher disposed at least partially inside the module case and configured to be connected to a fire extinguishing tank containing a fire extinguishing agent to inject the fire extinguishing agent directly into the module case when a thermal runaway or fire occurs in the at least one battery cell; and
an insulation cover configured to at least partially cover the fire extinguisher and disposed at least partially inside the module case,
wherein the insulation cover includes:
a cover base mounted to the rear surface of the module case;
a cover cap formed by a solid wall and configured to protrude by a predetermined length into the module case from the cover base;
an injection guider formed at the cover cap having at least one opening to guide the fire extinguishing agent of the fire extinguisher; and
a hot air hole formed in the cover cap and provided at a side opposite to the injection guider,
wherein the at least one opening is larger than the hot air hole.