CELL BALANCING CONTROL METHOD AND BATTERY SYSTEM PROVIDING SAME

The present disclosure relates to a cell balancing control method and battery system providing the same. The battery system includes: a battery including a plurality of battery cells; a battery management system (BMS) for determining whether a predetermined sleep mode entering condition is satisfied, entering the sleep mode when the sleep mode entering condition is satisfied, and waking up for each predetermined wakeup period in the sleep mode state to determine whether to perform cell balancing; and a timer synchronized with a time when the BMS sleeps and counting a first wakeup time, and a power supply unit for supplying a driving voltage to the BMS when the count result reaches the first wakeup time.