BATTERY MODULE AND METHOD OF MANUFACTURING THE SAME

The battery module includes a battery cell stack in which a plurality of battery cells are stacked, a frame member for housing the battery cell stack and having an opened upper part, and an upper plate for covering the battery cell stack on an upper part of the frame member, wherein the frame member comprises two side surface parts facing each other and a bottom part connecting the two side surface parts, and wherein a projected part projected inward is formed in the side surface part.