US 12,357,859 B2
Battery pack comprising fire extinguishing unit, battery rack comprising same, and power storage system
Jin-Kyu Lee, Daejeon (KR); and Goan-Su Jung, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/780,676
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jan. 12, 2021, PCT No. PCT/KR2021/000412
§ 371(c)(1), (2) Date May 27, 2022,
PCT Pub. No. WO2021/153926, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10-2020-0011324 (KR), filed on Jan. 30, 2020.
Prior Publication US 2024/0024714 A1, Jan. 25, 2024
Int. Cl. A62C 3/16 (2006.01); A62C 35/13 (2006.01); A62C 37/44 (2006.01)
CPC A62C 3/16 (2013.01) [A62C 35/13 (2013.01); A62C 37/44 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A battery pack, comprising:
at least one battery module;
a first fire extinguisher including:
a first fire detection sensor configured to detect that a temperature of the at least one battery module rises over a first predetermined temperature or smoke is generated at the at least one battery module,
a first fire extinguishing tank configured to accommodate a first fire extinguishing agent therein,
a first pipe configured to connect the first fire extinguishing tank and the at least one battery module so that the fire extinguishing agent is supplied from the first fire extinguishing tank to the at least one battery module, and
a first valve provided to the first pipe and configured to be opened to supply the fire extinguishing agent from the first fire extinguishing tank to the at least one battery module when the temperature of the at least one battery module rises over the first predetermined temperature or smoke is generated at the at least one battery module; and
a second fire extinguisher including:
a second fire detection sensor configured to detect that the temperature of the at least one battery module rises over a second predetermined temperature or smoke is generated at the at least one battery module,
a second pipe having a first end connected to the first pipe,
a fire extinguishing agent supplier connected to a second end of the second pipe so that a second fire extinguishing agent is supplied to the first pipe through the second pipe, and
a second valve configured to be opened to supply the second fire extinguishing agent from the fire extinguishing agent supplier to the first pipe through the second pipe when the temperature of the at least one battery module rises over the second predetermined temperature or smoke is generated at the at least one battery module,
wherein the first pipe independently receives the fire extinguishing agent from the first fire extinguishing tank or the fire extinguishing agent supplier,
wherein the first fire extinguisher further includes a first control unit configured to control the first valve to be opened or closed according to a signal received from the first fire detection sensor,
wherein the second fire extinguisher further includes a second control unit configured to control the second valve to be opened or closed according to a signal received from the second fire detection sensor,
wherein the first control unit transmits a fire signal to the second control unit, when receiving the fire signal from the first fire detection sensor, and
wherein the second control unit is configured to open the second valve, when the second fire detection sensor detects that the battery module is kept over the first predetermined temperature even though a predetermined time passes after receiving the fire signal from the first control unit.