BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

A battery module and a battery pack including the same. The battery module including a battery cell stack in which a plurality of battery cells are stacked; a housing for the battery cell stack; and a heat sink located at the bottom part of the housing. The heat sink includes an upper plate and a lower plate, the upper plate of the heat sink forms a bottom part of the housing, a refrigerant flow path is formed between the bottom part and the lower plate, and the bottom part and the lower plate are formed of different metals.