BATTERY PACK WITH IMPROVED SAFETY

A battery pack according to one embodiment of the present disclosure includes a cell module assembly including a battery cell stack in which a plurality of battery cells are stacked and each battery cell is erected in a vertical direction; a plate-shaped blocking members disposed between adjacent battery cells and erected in a vertical direction; a pack case configured so as to house the cell module assembly and opened at its upper surface; and a fire-fighting tank located above the cell module assembly and covering an upper surface of the pack case, wherein the blocking member includes a plurality of openings at its upper end, and an inside of the blocking member includes an empty space connected to the plurality of openings.