US 11,964,586 B2
Battery management system, battery management method, battery pack and electric vehicle
Jong-Wan Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/429,416
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Sep. 15, 2020, PCT No. PCT/KR2020/012441
§ 371(c)(1), (2) Date Aug. 9, 2021,
PCT Pub. No. WO2021/060761, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 10-2019-0116945 (KR), filed on Sep. 23, 2019.
Prior Publication US 2022/0126726 A1, Apr. 28, 2022
Int. Cl. B60L 58/12 (2019.01); G01R 31/382 (2019.01); G01R 31/50 (2020.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01)
CPC B60L 58/12 (2019.02) [G01R 31/382 (2019.01); G01R 31/50 (2020.01); H01M 10/4207 (2013.01); H01M 10/425 (2013.01); H01M 10/482 (2013.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01); H01M 2220/20 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A battery management system, comprising:
a first connection unit including a first power line, a first sensing line, a second sensing line and a first diode connected between the first sensing line and the first power line;
a first slave controller including a first power terminal connected to a positive terminal of a first battery cell included in a first battery group through the first power line, a first sensing terminal connected to the positive terminal of the first battery cell through the first sensing line and a second sensing terminal connected to a negative terminal of the first battery cell through the second sensing line; and
a master controller operably coupled to the first slave controller,
wherein the first slave controller is configured to:
execute a first communication mode and a second communication mode in a sequential order in response to a first diagnosis request signal from the master controller, wherein an amount of power required to execute the first communication mode is different from an amount of power required to execute the second communication mode,
determine a first reference voltage value indicating a voltage of the first battery cell during the execution of the first communication mode, and
determine a first comparative voltage value indicating a voltage of the first battery cell during the execution of the second communication mode, and
wherein the master controller is configured to determine whether the first power line has an open circuit fault based on the first reference voltage value and the first comparative voltage value.