BATTERY PACK

Disclosed herein relates to a battery pack for accommodating a battery module, including: a pack case in which a battery module settles; wherein the pack case includes: a main separation wall; a base plate coupled to the main separation wall and including a module area wherein the battery module is settled; and a side wall coupled along a perimeter of a base plate coupled to the main separation wall; wherein the main separation wall includes an insulating material with low thermal conductivity.