US 12,449,484 B2
Battery imbalance diagnosis and mitigation
Rasoul Salehi, Ann Arbor, MI (US); Steven Earl Muldoon, Royal Oak, MI (US); Yue-Yun Wang, Troy, MI (US); and Wen-Chiao Lin, Rochester Hills, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Jun. 13, 2023, as Appl. No. 18/334,015.
Prior Publication US 2024/0418789 A1, Dec. 19, 2024
Int. Cl. G01R 31/392 (2019.01); G01R 31/389 (2019.01); G01R 31/396 (2019.01); H01M 10/48 (2006.01); B60R 16/033 (2006.01)
CPC G01R 31/392 (2019.01) [G01R 31/389 (2019.01); G01R 31/396 (2019.01); H01M 10/482 (2013.01); B60R 16/033 (2013.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
isolating, via a first isolation unit, a first battery cell from a plurality of battery cells wherein the first isolation unit includes a first connection point connected to a first end of a switch, wherein a second end of the switch is connected to a first electrical path, and wherein a third end of the switch is connected to a second electrical path, and a second connection point connected to the first electrical path and the second electrical path, wherein the second electrical path includes a resistor or an RC filter;
determining, via a complex impedance measurement unit, a state of health of the first battery cell; and
controlling, via a controller, the first battery cell based on the state of health of the first battery cell.