US 12,092,681 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. 17/924,028
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Dec. 15, 2021, PCT No. PCT/KR2021/019124
§ 371(c)(1), (2) Date Nov. 8, 2022,
PCT Pub. No. WO2022/145822, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 10-2020-0184946 (KR), filed on Dec. 28, 2020.
Prior Publication US 2023/0168292 A1, Jun. 1, 2023
Int. Cl. G01R 31/14 (2006.01); G01R 31/382 (2019.01); G01R 31/389 (2019.01)
CPC G01R 31/14 (2013.01) [G01R 31/382 (2019.01); G01R 31/389 (2019.01)] 12 Claims
OG exemplary drawing
 
1. A battery management apparatus, comprising:
an EIS unit configured to output an AC current to a battery at a plurality of time points and generate an EIS profile representing a resistance of the battery as a corresponding relationship between a real part and an imaginary part at each of the plurality of time points; and
a control unit configured to obtain the plurality of EIS profiles for the battery generated by the EIS unit, determine a plurality of arcs in each of the plurality of EIS profiles, calculate an arc resistance value for each of the plurality of determined arcs, calculate a resistance change rate for the arc resistance value between corresponding arcs among the plurality of arcs, and determine each of the plurality of arcs as a negative electrode-originated arc or a positive electrode-originated arc based on the plurality of calculated resistance change rates and a preset criterion change rate.