US 12,255,474 B2
Battery pack power cutting off apparatus
Sung Gun Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/629,291
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Aug. 7, 2020, PCT No. PCT/KR2020/010506
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/025537, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10-2019-0096999 (KR), filed on Aug. 8, 2019.
Prior Publication US 2022/0247187 A1, Aug. 4, 2022
Int. Cl. H02J 7/00 (2006.01); G01R 31/396 (2019.01); H02H 7/18 (2006.01); H02J 13/00 (2006.01)
CPC H02J 7/0031 (2013.01) [H02J 7/0047 (2013.01); H02J 7/007 (2013.01); G01R 31/396 (2019.01); H02H 7/18 (2013.01); H02J 7/00032 (2020.01); H02J 13/00026 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A battery pack power cutting off apparatus comprising:
a power cutoff circuit configured to block a line through which a charge/discharge current of a battery module flows, the power cutoff circuit including a heater resistor, a switch connected to the heater resistor, and an OR circuit connected to the switch;
a communicator configured to receive an operation signal of the power cutoff circuit from an external device; and
a switching element configured to control to apply power to the heater resistor included in the power cutoff circuit based on the operation signal of the power cutoff circuit provided from the OR circuit to the switch,
wherein the OR circuit receives the operation signal of the power cutoff circuit from a control or the communicator and transmits the operation signal of the power cutoff circuit, and
wherein when power is applied to the heater resistor and generates heat, the power cutoff circuit operates to block the current flowing through the line.