BATTERY MODULE COMPRISING CELL FRAME

Disclosed is a battery module having the increased operating life by efficiently maintaining the heat balance. To achieve the object, the battery module according to the present disclosure includes a plurality of cylindrical battery cells including an electrode terminal formed in each of an upper end and a lower end, and arranged in a horizontal direction, a module housing including an upper wall, a sidewall and a lower wall to receive the plurality of cylindrical battery cells, at least one of the upper wall or the lower wall having a plurality of cooling holes through the coolant flows in and out, at least two of the cooling holes having different sizes, and a cell frame including an insertion portion having an inner wall to wrap around at least part of an outer surface of each of the plurality of cylindrical battery cells, and a plurality of cooling passages connected to the cooling holes in communication with the cooling holes and having a tubular shape extending in a vertical direction to allow the coolant to flow in and out.