A method of determining a state of health of a vehicle battery on a hybrid or electric vehicle includes receiving diagnostic data including a trouble code status, an internal resistance and temperature of the battery cells. The vehicle battery charging and discharging are monitored and cell voltage for each of the battery cells is requested when the battery charging meets a charging threshold and the battery discharging meets a discharging threshold. The cell voltage is received from each of the battery cells and a determination of a voltage balance is made by comparing received voltages to a known average voltage range. A battery state of health is calculated based on a combined assessment of the diagnostic trouble code status, the internal resistance and temperature of the battery cells, and the voltage balance.
HIGH VOLTAGE BATTERY STATE OF HEALTH
2024-10-24
Patent
Electronic Resource
English
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