US 12,188,989 B2
Method for detecting abnormal battery cell
Jake Kim, Yongin-si (KR); Byeonghui Lim, Yongin-si (KR); Yongjun Hwang, Yongin-si (KR); Giheon Kim, Yongin-si (KR); Christober Rayappan, Yongin-si (KR); and Sungwook Paek, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Appl. No. 17/594,497
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
PCT Filed Feb. 5, 2020, PCT No. PCT/KR2020/001667
§ 371(c)(1), (2) Date Oct. 19, 2021,
PCT Pub. No. WO2020/262789, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 10-2019-0075223 (KR), filed on Jun. 24, 2019.
Prior Publication US 2022/0196754 A1, Jun. 23, 2022
Int. Cl. G01R 31/392 (2019.01); G01R 19/165 (2006.01); G01R 31/3842 (2019.01); G01R 31/388 (2019.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01); H01M 10/48 (2006.01); G01R 31/36 (2020.01); H01M 10/42 (2006.01); H02J 7/00 (2006.01)
CPC G01R 31/392 (2019.01) [G01R 31/3842 (2019.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01); G01R 19/165 (2013.01); G01R 19/16542 (2013.01); G01R 19/16566 (2013.01); G01R 31/3648 (2013.01); G01R 31/388 (2019.01); H01M 2010/4271 (2013.01); H01M 10/48 (2013.01); H02J 7/0013 (2013.01); H02J 7/005 (2020.01); H02J 7/007182 (2020.01); H02J 7/007194 (2020.01)] 14 Claims
OG exemplary drawing
 
1. A method for detecting an abnormal battery cell, the method comprising:
detecting a voltage and a current of each of a plurality of battery cells electrically connected between first and second terminals and being in use so as to periodically generate a voltage value and a current value for each of the plurality of battery cells;
updating, by a processor in real time by using an adaptive filter, a plurality of G parameter values for a G parameter and a plurality of H parameter values for an H parameter, by retrieving from a memory of the processor the voltage value and the current value of a corresponding battery cell, wherein each of the plurality of G parameter values and each of the plurality of H parameter values indicate a current state of a corresponding battery cell of the plurality of battery cells, of based on the voltage value and the current value of the corresponding battery cell;
calculating, by the processor, a representative G parameter value for the plurality of battery cells and calculating a representative H parameter value for the plurality of battery cells; and
identifying, by the processor, an abnormally deteriorated cell from the plurality of battery cells by retrieving from the memory of the processor a corresponding G parameter value of the plurality of G parameter values, a corresponding H parameter value of the plurality of H parameter values, the representative G parameter value, and the representative H parameter value, and determining, by the processor, a deviation of the corresponding G parameter value from the representative G parameter value, and a deviation of the corresponding H parameter value from the representative H parameter value, wherein
the G parameter is a parameter indicating sensitivity of voltage with respect to a change in a current of the corresponding battery cell, and
the H parameter is a parameter indicating an effective potential determined by a local equilibrium distribution and a resistance distribution in the corresponding battery cell.