Battery module and manufacturing method thereof

Discussed is a battery module including a battery cell stack in which a plurality of battery cells are stacked; a module frame for accommodating the battery cell stack; and a cooling plate located below the module frame, wherein a bottom part of the module frame and the cooling plate form a heat sink, and wherein a guide part is formed on the bottom part of the module frame, and the cooling plate is coupled to the bottom part of the module frame to correspond to the guide part.