US 12,032,033 B2
Battery management apparatus, battery pack, battery system, and battery management method
Myung-Hyun Shim, Daejeon (KR); Sung-Yul Yoon, Daejeon (KR); Ki-Woong Kim, Daejeon (KR); Won-Kyung Kim, Daejeon (KR); Jeong-Bin Lee, Daejeon (KR); Jae-Sung Im, Daejeon (KR); and Won-Bin Choi, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/909,911
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jul. 30, 2021, PCT No. PCT/KR2021/010016
§ 371(c)(1), (2) Date Sep. 7, 2022,
PCT Pub. No. WO2022/025725, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 10-2020-0096289 (KR), filed on Jul. 31, 2020.
Prior Publication US 2023/0108798 A1, Apr. 6, 2023
Int. Cl. G01R 31/388 (2019.01); G01R 19/165 (2006.01); G01R 19/30 (2006.01); G01R 31/392 (2019.01); G01R 31/396 (2019.01)
CPC G01R 31/388 (2019.01) [G01R 19/1659 (2013.01); G01R 19/30 (2013.01); G01R 31/392 (2019.01); G01R 31/396 (2019.01)] 13 Claims
OG exemplary drawing
 
1. A battery management apparatus, comprising:
a voltage measurement circuit configured to measure a cell voltage of each of a plurality of battery cells; and
a control unit configured to:
determine the cell voltage of each of the plurality of battery cells and a reference voltage of the plurality of battery cells at a preset time interval during a rest period,
determine a first accumulated change of the cell voltage of each battery cell during the rest period,
determine a second accumulated change of the reference voltage during the rest period, and
determine whether each battery cell is defective by comparing the first accumulated change of each battery cell with the second accumulated change.