BATTERY SYSTEM COMPRISING HEATER AND OPERATING METHOD THEREOF

A battery system according to an embodiment of the present invention may comprise: a plurality of battery assemblies; a plurality of heaters that correspond to respective battery assemblies and are arranged to be connected in series on a heater driving path; and a battery management device for monitoring and managing the battery assemblies and the heaters. The battery management device may control a heater driving switch disposed on the heater driving path so as to turn the heaters on or off simultaneously.