HEAT PUMP SYSTEM FOR A VEHICLE

A heat pump system for a vehicle is capable of adjusting the temperature of the battery module by using a single chiller in which a normal coolant and a low-conductivity coolant having different properties are heat-exchanged with each other. The heat pump system is further capable of decreasing the manufacturing cost as well as improving the fire stability of the battery module by employing a separate battery cooling apparatus for circulating the low-conductivity coolant through a high-voltage battery module.