BATTERY PACK AND METHOD OF DRIVING THE SAME

摘要

A battery pack includes an internal battery, a measuring unit, and a power controller. The measuring unit measures one or more charge/discharge conditions of an external battery. The power controller is connected to the internal battery and controls output current levels and input current levels of the external battery and the internal battery based on the one or more charge/discharge conditions. The one or more charge/discharge conditions include a state of charge level of the external battery.