US 12,276,700 B2
Relay state management apparatus and operating method thereof
Hee Ju Park, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/913,036
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Oct. 29, 2021, PCT No. PCT/KR2021/015479
§ 371(c)(1), (2) Date Sep. 20, 2022,
PCT Pub. No. WO2022/114559, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 10-2020-0163243 (KR), filed on Nov. 27, 2020.
Prior Publication US 2023/0176127 A1, Jun. 8, 2023
Int. Cl. G01R 31/327 (2006.01); G01R 15/04 (2006.01); G01R 19/04 (2006.01); G01R 31/00 (2006.01); G01R 31/36 (2020.01)
CPC G01R 31/3278 (2013.01) [G01R 19/04 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A relay state management apparatus comprising:
a circuit for supplying power from a battery module to a load, the circuit comprising:
a switch connected to an end of the battery module;
one or more resistors connected to the switch;
a voltage sensor measuring a voltage applied to the one or more resistors;
a relay connected between the battery module and the load along an electrical path;
a capacitor connected to the electrical path between a node of the electrical path and ground; and
a controller configured to:
control the switch and the relay to be short-circuited for a predetermined duration;
calculate a voltage difference between the voltage measured by the voltage sensor at a beginning of the predetermined duration and the voltage measured by the voltage sensor at an end of the predetermined duration;
diagnose a state of the relay based on the calculated voltage difference.