BATTERY PACK

A battery pack for a vehicle, which allows smooth communication and power connection to the vehicle when mounted to an electric vehicle. The battery pack includes a vehicle controller, an auxiliary battery and a vehicle memory to supply a driving power to the motor, and also includes a battery cell; a power supply terminal; a power supply path; a switch; a memory reader configured to read charging information stored in the vehicle memory; and a processor configured to control the switch to supply a power from the battery cell to the auxiliary battery, based on the charging information of the auxiliary battery read by the memory reader.