	US 12,449,485 B2
	Battery management apparatus and method
Hyun Chul Lee, Daejeon (KR); Dong Keun Kwon, Daejeon (KR); Seung Hyun Kim, Daejeon (KR); An Soo Kim, Daejeon (KR); and Chae Bin Shin, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/911,936
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 1, 2021, PCT No. PCT/KR2021/013537 § 371(c)(1), (2) Date Sep. 15, 2022, PCT Pub. No. WO2022/097931, PCT Pub. Date May 12, 2022.
Claims priority of application No. 10-2020-0147136 (KR), filed on Nov. 5, 2020.
Prior Publication US 2023/0148088 A1, May 11, 2023
Int. Cl. G01R 31/387 (2019.01); G01R 31/392 (2019.01); G01R 31/396 (2019.01); H02J 7/00 (2006.01)

CPC G01R 31/396 (2019.01) [G01R 31/387 (2019.01); G01R 31/392 (2019.01); H02J 7/0014 (2013.01); H02J 7/005 (2020.01)]

14 Claims

1. A battery management apparatus, comprising:

a state of health (SOH) calculator configured to calculate a SOH of each of a plurality of battery cells based respectively on a state of charge (SOC), a voltage, an internal resistance, and a number of times of charging and discharging of a corresponding one of the battery cells;

a balancing target determiner configured to:

select, as a second battery cell, a battery cell among the plurality of battery cells having an SOC difference from a first battery cell having a lowest SOC from among the plurality of battery cells, the SOC difference being greater than or equal to a reference value, and

determine the second battery cell as a balancing target based on a comparison of a SOH of the first battery cell with a SOH of the second battery cell; and

a balancing controller configured to perform balancing on the second battery cell, determined as the balancing target, in one of a first section in an SOC graph in which the SOC of the second battery cell is configured to be constant at an upper end and a second section of the SOC graph in which the SOC of the second battery cell is configured to be constant at a lower end that is lower than the upper end.