US 12,253,572 B2
Battery diagnosing apparatus and method
Yang-Soo An, Daejeon (KR); and Yong-Chul Sung, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/005,272
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Dec. 28, 2021, PCT No. PCT/KR2021/020090
§ 371(c)(1), (2) Date Jan. 12, 2023,
PCT Pub. No. WO2022/145998, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 10-2020-0184947 (KR), filed on Dec. 28, 2020.
Prior Publication US 2023/0258735 A1, Aug. 17, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/3835 (2019.01)
CPC G01R 31/396 (2019.01) [G01R 31/3835 (2019.01)] 12 Claims
OG exemplary drawing
 
1. A battery diagnosing apparatus, comprising:
a voltage sensor configured to measure a voltage of each of a plurality of battery cells included in a battery module at each voltage measurement cycle of a plurality of diagnosis cycles, wherein each diagnosis cycle includes a respective plurality of voltage measurement cycles that do not overlap with the respective plurality of voltage measurement cycles of the other diagnosis cycles of the plurality of diagnosis cycles;
a controller; and
memory having instructions stored thereon and configured to cause the controller to:
at each respective voltage measurement cycle, obtain measured voltages of the plurality of battery cells from the voltage sensor;
at each respective diagnosis cycle, calculate a voltage change amount based on the measured voltages of the plurality of voltage measurement cycles of the respective diagnosis cycle;
at each respective diagnosis cycle, calculate a voltage change rate indicating a difference between a first calculated voltage change amount of the respective diagnosis cycle and a last calculated voltage change amount of the respective diagnosis cycle; and
diagnose the battery module based on one or more calculated voltage change rates and a preset threshold change rate.