Gm global technology operations llc (20250102585). BATTERY ASSEMBLY STATE-OF-CHARGE ESTIMATION
BATTERY ASSEMBLY STATE-OF-CHARGE ESTIMATION
Organization Name
gm global technology operations llc
Inventor(s)
Charles W. Wampler of Birmingham MI US
Chen-Fang Chang of Bloomfield Hills MI US
BATTERY ASSEMBLY STATE-OF-CHARGE ESTIMATION
This abstract first appeared for US patent application 20250102585 titled 'BATTERY ASSEMBLY STATE-OF-CHARGE ESTIMATION
Original Abstract Submitted
a system for estimating a state-of-charge of a battery assembly includes a sensor cell and an estimator circuit. the sensor cell is coupled in series to the battery assembly. the battery assembly has an assembly battery chemistry and the sensor cell has a sensor battery chemistry, and the assembly battery chemistry is different than the sensor battery chemistry. the estimator circuit is operational to acquire a sequence of current sensor cell state-of-charges based on a sensor cell model and a sequence of sensor voltages across the sensor cell, calculate a sequence of current battery assembly state-of-charges based on the sequence of current sensor cell state-of-charges, and calculate an estimated battery assembly state-of-charge of the battery assembly and an estimated sensor cell state-of-charge of the sensor cell by filtering in parallel the sequence of current battery assembly state-of-charges and the sequence of current sensor cell state-of-charges.