US 12,278,391 B2
Battery pack comprising extinguishment unit
Jin-Kyu Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/761,784
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Aug. 19, 2020, PCT No. PCT/KR2020/011050
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2021/054625, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10-2019-0115463 (KR), filed on Sep. 19, 2019.
Prior Publication US 2022/0376354 A1, Nov. 24, 2022
Int. Cl. H01M 50/383 (2021.01); A62C 3/16 (2006.01); A62C 37/14 (2006.01); H01M 50/211 (2021.01); H01M 50/244 (2021.01)
CPC H01M 50/383 (2021.01) [A62C 3/16 (2013.01); A62C 37/14 (2013.01); H01M 50/211 (2021.01); H01M 50/244 (2021.01); H01M 2200/10 (2013.01); H01M 2220/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
at least one battery module having a cell assembly including a plurality of secondary batteries arranged in a first direction; and
a fire extinguisher comprising:
a fire extinguishing tank configured to contain a fire extinguishing agent;
a pipe connected to the fire extinguishing tank to supply the fire extinguishing agent from the fire extinguishing tank to the at least one battery module;
a fire extinguishing valve configured so that, when an internal gas of the at least one battery module is heated over a predetermined temperature, an inner configuration of the fire extinguishing valve is partially deformed by the heated internal gas to open an output hole of the fire extinguishing valve to supply the fire extinguishing agent from the fire extinguishing tank into the at least one battery module;
a top portion having the output hole so that the output hole is sealed by the glass bulb; and
a gas guide extending from the top portion, the gas guide having a first end connected to the top portion and a second free end.