BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

A battery module includes a battery cell stack including a plurality of battery cells arranged and stacked in a first direction; a module housing configured to accommodate the battery cell stack; and a deformation prevention structure disposed between the module housing and an outermost peripheral battery cell among the plurality of battery cells, in which the module housing includes a housing plate adjacent to the outermost peripheral battery cell, and in which the deformation prevention structure includes: a pressing plate fixed to the housing plate and supported on the battery cell stack; a flat spring disposed between the pressing plate and the housing plate; and a protruding portion supported on the pressing plate and protruding from an outer surface of the housing plate.