BATTERY MODULE HAVING IMPROVED ENERGY DENSITY AND BATTERY PACK INCLUDING THE SAME

A battery module includes a unit module stack, in which unit modules, each of which includes one or more battery cells and a cell cartridge configured to receive the battery cells therein, are horizontally or vertically stacked on the basis of the ground; a pair of insulation sheets located at outermost sides of the unit module stack; and a pair of end plates located outside the pair of insulation sheets, wherein each of the pair of end plates is provided with a first protuberance protruding in a direction in which the unit module stack is located, and each of the pair of insulation sheets is provided with a first receiving portion configured to receive the first protuberance of a corresponding one of the end plates, the first receiving portion having an identical shape to the first protuberance, and a battery pack including the same.