BATTERY PACK WITH IMPROVED SAFETY

Disclosed is a battery pack with improved safety to more effectively prevent thermal propagation between battery modules. The battery pack includes a plurality of battery modules, each of which includes at least one battery cell and a module terminal; a barrier unit interposed between adjacent battery modules; and a bus bar unit configured to electrically connect module terminals of different battery modules and located at an end or inside of the barrier unit to seal the end or inside of the barrier unit.