BATTERY MODULE, AND BATTERY PACK AND VEHICLE COMPRISING SAME

Discussed is a battery module, including at least one battery cell, a pair of pressing plates respectively disposed at opposite side surfaces of the at least one battery cell, and a module cover coupled to the pair of pressing plates to cover an upper side or a lower side of the at least one battery cell, wherein opposite ends of the module cover overlap an upper end or a lower end of the pair of pressing plates, and have a plurality of welding portions and a plurality of auxiliary welding beads alternately arranged along a longitudinal direction of the module cover, and wherein the opposite ends of the module cover are welded to the pair of pressing plates at the plurality of welding portions.