DETERMINING CAPACITY INDICATORS FOR BATTERY CELL GROUPS

A method of determine a capacity indicator for a battery cell group is provided. The method includes determining a missing capacity for a battery cell group during a charging event. The missing capacity indicates a difference between a first amount of energy stored at a full capacity of the battery cell group and a second amount of stored at a current capacity of the battery cell group. The method also includes determining a voltage of the battery cell group during the charging event. The method further includes determining a capacity indicator of the battery cell group based on whether balancing was performed based on one or more of the missing capacity and the voltage.