US 11,815,558 B2
Apparatus and method for diagnosing abnormal degradated battery cell
Hyun Chul Lee, Daejeon (KR); Dong Keun Kwon, Daejeon (KR); Sung Yul Yoon, Daejeon (KR); Seung Hyun Kim, Daejeon (KR); An Soo Kim, Daejeon (KR); and Chae Bin Shin, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/615,646
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jul. 24, 2020, PCT No. PCT/KR2020/009802
§ 371(c)(1), (2) Date Dec. 1, 2021,
PCT Pub. No. WO2021/107323, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10-2019-0156065 (KR), filed on Nov. 28, 2019.
Prior Publication US 2022/0317196 A1, Oct. 6, 2022
Int. Cl. G01R 31/392 (2019.01); G01R 31/396 (2019.01); G01R 31/3842 (2019.01); H02J 7/00 (2006.01)
CPC G01R 31/392 (2019.01) [G01R 31/3842 (2019.01); G01R 31/396 (2019.01); H02J 7/005 (2020.01); H02J 7/0048 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A battery management system (BMS) comprising:
an SOC calculation unit configured to calculate a state of charge (SOC) of a plurality of battery cells;
a change amount calculation unit configured to calculate, for each of the plurality of battery cells, an SOC, change amount that is a change amount of the calculated SOC during a preset period and an SOC change amount average that is an average of the SOC change amount of all the plurality of battery cells; and
an abnormal deterioration diagnosis unit configured to diagnose abnormal deterioration of each of the plurality of battery cells using the SOC change amount and the SOC change amount average,
wherein the abnormal deterioration diagnosis unit is further configured to:
diagnose a battery cell whose (SOC change amount/SOC change amount average) value is greater than or equal to a reference value as an abnormally deteriorated battery cell.