US 12,405,310 B2
Battery management apparatus and method
Yoon-Jung Bae, Daejeon (KR); and A-Ming Cha, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/923,027
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 17, 2021, PCT No. PCT/KR2021/016934
§ 371(c)(1), (2) Date Nov. 3, 2022,
PCT Pub. No. WO2022/108344, PCT Pub. Date May 27, 2022.
Claims priority of application No. 10-2020-0153903 (KR), filed on Nov. 17, 2020.
Prior Publication US 2023/0176128 A1, Jun. 8, 2023
Int. Cl. G01R 31/36 (2020.01); G01R 31/382 (2019.01); G01R 31/396 (2019.01); H01M 10/46 (2006.01); H01M 10/42 (2006.01)
CPC G01R 31/3648 (2013.01) [G01R 31/382 (2019.01); G01R 31/396 (2019.01); H01M 10/46 (2013.01); H01M 2010/4271 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A battery management apparatus, which manages a battery cell charged multiple times at each of a plurality of current rates (C-rates), comprising:
a controller; and
memory having stored thereon instructions that, when executed, are configured to cause the controller to:
for each of a plurality of battery profiles representing a relationship between voltage and capacity of a battery cell at respective current rates (C-rates), obtain a differential profile representing a relationship between the voltage and a differential capacity of the battery cell;
classify the plurality of differential profiles into a threshold differential profile corresponding to a preset threshold C-rate and a plurality of reference differential profiles;
determine a threshold peak in the threshold differential profile;
determine a plurality of reference peaks including a respective reference peak in each of the plurality of reference differential profiles;
compare a voltage of the determined threshold peak with a voltage of the plurality of determined reference peaks; and
determine an upper limit C-rate for the battery cell based on the comparison, wherein the battery cell is configured to be charged and/or discharged at a C-rate equal to or less than the upper limit C-rate.