US 12,237,715 B2
Apparatus for supplying emergency power
Ki-Deok Kim, Daejeon (KR); Jin-Hyun Lee, Daejeon (KR); and Jo-Yeon Hwang, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/769,057
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Feb. 8, 2021, PCT No. PCT/KR2021/001656
§ 371(c)(1), (2) Date Apr. 14, 2022,
PCT Pub. No. WO2021/162385, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 10-2020-0017877 (KR), filed on Feb. 13, 2020.
Prior Publication US 2024/0106262 A1, Mar. 28, 2024
Int. Cl. H02J 9/06 (2006.01); H02J 7/00 (2006.01)
CPC H02J 9/061 (2013.01) [H02J 7/00308 (2020.01); H02J 7/007182 (2020.01); H02J 7/007188 (2020.01)] 16 Claims
OG exemplary drawing
 
1. An apparatus for supplying emergency power, comprising:
a protection circuit connected to a battery and configured to limit an available voltage range of the battery to a limited available voltage range from a lower limit greater than 0 to an upper limit less than a maximum voltage of the battery;
a bypass circuit including a switching element connected in parallel to the protection circuit and configured to form a bypass path of a current output from the battery according to an operation state of the switching element;
a measuring circuit configured to measure a voltage of the battery; and
a control circuit configured to control the operation state of the switching element to a turn-on state to electrically connect the bypass path of the current output from the battery to bypass the protection circuit and to release at least one of the lower limit and the upper limit on the available voltage range,
wherein the control circuit is further configured to control the operation state of the switching element to the turn-on state or a turn-off state based on whether the measured voltage is within a preset low-voltage range, the preset low-voltage range being within the limited available voltage range and being closer to the lower limit than to the upper limit of the limited available voltage range.