A cooling system for a battery pack which can reduce the number of components, manufacturing cost and an installation space, is provided. The battery pack includes high-voltage electrically conductive paths connected to a positive electrode and a negative electrode thereof, respectively. The high-voltage electrically conductive path connected to the positive electrode serves as a cooling member. The high-voltage electrically conductive path connected to the positive electrode is arranged along the battery pack to absorb heat generated at the battery pack and dissipate the absorbed heat at a location distant from the battery pack. The invention takes an advantage of the superior heat conductivity of the high-voltage electrically conductive path to cool down the battery pack.