US 12,422,499 B2
Battery management apparatus and method
Yee-Gahng Song, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 18/007,585
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jan. 13, 2022, PCT No. PCT/KR2022/000687
§ 371(c)(1), (2) Date Dec. 1, 2022,
PCT Pub. No. WO2022/154545, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 10-2021-0004852 (KR), filed on Jan. 13, 2021.
Prior Publication US 2023/0213589 A1, Jul. 6, 2023
Int. Cl. G01R 31/396 (2019.01); H02J 7/00 (2006.01)
CPC G01R 31/396 (2019.01) [H02J 7/0013 (2013.01); H02J 7/005 (2020.01)] 11 Claims
OG exemplary drawing
 
1. A battery management apparatus, comprising:
a battery information obtaining unit configured to obtain a plurality of battery information for a plurality of battery cells; and
a control unit configured to:
calculate a whisker for the plurality of battery information based on a criterion distribution profile for a population of the plurality of battery cells,
generate a box plot for the plurality of battery cells based on the plurality of battery information and the calculated whisker, and
determine a state of each of the plurality of battery cells according to whether each of the plurality of battery information is included in a threshold region corresponding to the generated box plot,
wherein batteries with battery information that are outside the threshold region are determined to be defective,
wherein the control unit is configured to calculate the whisker based on an average value of the criterion distribution profile, a reference value corresponding to a predetermined probability density from the average value and a threshold value set to correspond to a defective rate for the population of the plurality of battery cells, and
wherein the battery management apparatus is configured to control a charging and/or discharging of each of the plurality of battery cells based on the determined state of each of the plurality of battery cells.