18475363. BATTERY ASSEMBLY STATE-OF-CHARGE ESTIMATION (GM Global Technology Operations LLC)
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 18475363 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.