Patent ID: 8048554

Claim:
A cooling system for vehicle battery packs, including: a double filter device mounted at an air inlet part, through which air for cooling the battery packs is introduced from an inside of the vehicle, the battery packs including a battery module constructed by mounting one or more plate-shaped unit cells in a cartridge, and successively stacking a plurality of the cartridge; wherein the double filter comprises: a pre-filter having relatively large air holes, the pre-filter having high frequency of replacement; and a medium filter having relatively small air holes, the medium filter having low frequency of replacement, the pre-filter being located before the medium filter in the direction in which the air is introduced, wherein the cooling system is constructed such that the air existing inside of the vehicle at a region around the battery pack isolated from a cabin of the vehicle, is directly introduced into the battery pack through intake ports without passing through a pipe-shaped intake duct, and the air having passed through the battery pack, which has been heated, is discharged through an exhaust duct connected to an internal space of the vehicle not at the region around the battery pack isolated from the cabin of the vehicle, in which a possibility of air to be recirculated to the region around the battery pack is low, and the double filter device is mounted between the unit cells and the intake ports, and wherein the internal space of the vehicle is a space defined between an inner panel and an outer panel of the vehicle.