A battery pack and a protection method of the battery pack are provided. The battery pack includes a battery including battery cells, a balancing unit for balancing voltages between the battery cells, a first switch on a high-current path of the battery, and a battery management unit for monitoring a voltage, a temperature, and a current of the battery, for applying a control signal for turning off the first switch, and for operating the balancing unit when the first switch is not turned off in response to the control signal.