BATTERY MODULE HAVING HEAT PIPE AND BATTERY PACK INCLUDING THE SAME

Disclosed is a battery module having an improved heat balance for a plurality of cylindrical battery cells and a battery pack including the same. The battery module includes a plurality of cylindrical battery cells; a module housing having an accommodation portion formed therein to accommodate the plurality of cylindrical battery cell; and a heat pipe having an outer wall to form a sealed tube structure, the tube structure including a coolant therein, the heat pipe including a wick located to surround an inner wall of the tube structure and having a plurality of micropores formed therein, the heat pipe extending in a horizontal direction along the plurality of cylindrical battery cells, the heat pipe having a plate shape and provided to stand so that both surfaces thereof are oriented in a horizontal direction.