Cooling system of battery pack for vehicle

A cooling system for vehicle battery packs, the cooling system constructed such that air existing inside a vehicle in a region around a battery pack is isolated from a cabin of the vehicle and is directly introduced into the battery pack without passing through an 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, in which a possibility of air to be recirculated to the region around the battery pack is low, wherein the cooling system comprises:

• a closed type housing for surrounding the outer surface of the battery pack, the battery pack including unit cells;
• a plurality of intake ports formed in the housing at regions corresponding to the unit cells;
• an exhaust duct connected to the housing at a region opposite to the intake ports;
• and
• a cooling fan mounted to the exhaust duct which induces the air to flow through the plurality of intake ports and the housing and the cooling fan to the exhaust duct,
• wherein the internal space of the vehicle, to which the exhaust duct is connected, is a space defined between an inner panel and an outer panel of the vehicle;
• wherein each of the intake ports is constructed in the shape of a slit, which corresponds to each plate-shaped unit cell of the battery pack, and the intake ports are located in correspondence to the respective unit cells;
• and
• wherein the upper part of each intake port is constructed in a skirt structure, by which the introduction of foreign matter is prevented.