BATTERY MODULE, BATTERY PACK COMPRISING BATTERY MODULE, AND VEHICLE COMPRISING BATTERY PACK

A battery module incudes a plurality of cylindrical battery cells disposed upright such that a positive electrode faces downward and a negative electrode faces upward; a cell housing configured to accommodate the plurality of battery cells; a top plate configured to entirely cover an upper side of the cell housing and electrically connected to a negative electrode of each of the plurality of battery cells; a bottom plate disposed opposite the top plate to entirely cover a lower side of the cell housing and electrically connected to a positive electrode of each of the plurality of battery cells; and a phase change material filled in the cell housing so that the plurality of battery cells are partially submerged and cooling the plurality of battery cells.