US 12,416,683 B2
Slave BMS for diagnosing an error of a battery module and battery pack comprising same slave BMS
Ye Seul Lee, Daejeon (KR); and Hyun Ki Cho, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/801,924
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed May 28, 2021, PCT No. PCT/KR2021/006645
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2021/256722, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 10-2020-0074768 (KR), filed on Jun. 19, 2020.
Prior Publication US 2023/0101736 A1, Mar. 30, 2023
Int. Cl. G01R 31/396 (2019.01); H01M 10/42 (2006.01); H02J 7/00 (2006.01)
CPC G01R 31/396 (2019.01) [H01M 10/425 (2013.01); H02J 7/0047 (2013.01); H01M 2010/4271 (2013.01); H01M 2010/4278 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A battery pack comprising:
a master battery management system (BMS); and
a first slave BMS configured to monitor a first battery module, wherein the first slave BMS is configured to:
in response to an error in a first battery module, determine whether or not the error is critical;
communicate with the master BMS in a first time segment corresponding to an ID a first identification (ID) of the first slave BMS;
change the first ID to a second ID, wherein a timing of the change is based on whether or not the error is critical; and
after the first ID is changed to the second ID, output information on the error to the master BMS in a second time segment corresponding to the second ID.