BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

A battery pack includes a pack housing including a lower frame and a side frame; and one or more battery modules accommodated in the pack housing, wherein the battery module includes a plurality of cell stacks in which a plurality of battery cells are stacked in a first direction; and a plurality of end plates fastened to the lower frame, and wherein the plurality of end plates and the plurality of cell stacks are alternately disposed in the first direction.