BATTERY PACK AND VEHICLE INCLUDING SAME

Disclosed is a battery pack which includes a plurality of battery modules; a pack case having an inner space configured to accommodate the plurality of battery modules and a wall portion configured to surround the battery modules; and at least one fire-resistance barrier disposed between the battery modules to partition the inner space and detachably assembled to the wall portion, wherein the fire-resistance barrier includes an air layer and a fire-resistance pad layer made of a fire-resistance material therein.