US 12,259,440 B2
Battery management system and battery management method thereof
Kyung Chul Ko, Daejeon (KR); Jeong Min Seo, Daejeon (KR); and Byung Eun Lee, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Aug. 25, 2023, as Appl. No. 18/238,055.
Application 18/238,055 is a continuation of application No. 17/167,195, filed on Feb. 4, 2021, granted, now 11,774,508.
Claims priority of application No. 10-2020-0014697 (KR), filed on Feb. 7, 2020.
Prior Publication US 2023/0408591 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 31/3842 (2019.01); G01R 31/36 (2020.01); G01R 31/392 (2019.01); H01M 10/42 (2006.01)
CPC G01R 31/3842 (2019.01) [G01R 31/3648 (2013.01); G01R 31/392 (2019.01); H01M 10/425 (2013.01); H01M 2010/4271 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A battery management system that selects one or more battery cells of a high-risk group that has a risk in which a terminal voltage during charging or a terminal voltage during discharging is out of an operating voltage among a plurality of battery cells included in a battery pack, the battery management system comprising:
a state information calculation unit that calculates state information of each of the plurality of battery cells; and
a cell selection unit that selects the battery cells of a high-risk group by using the state information,
wherein the cell selection unit calculates a maximum voltage change amount of the plurality of battery cells, calculates a voltage threshold value serving as a reference for selecting the battery cells of the high-risk group by using the maximum voltage change amount, and selects the battery cells of the high-risk group based on the voltage threshold value.