Heat management system of vehicle

A heat management system of a vehicle, comprising:

• a cooling circuit comprising a radiator, a first valve, a first pump, and at least one electric part which are connected through a cooling water line to cool the at least one electric part installed on the cooling water line through cooling water circulated in the cooling water line;
• a battery cooling circuit comprising a second pump and a battery module which are connected through a battery cooling water line to cool the battery module installed on the battery cooling water line through the cooling water circulated in the battery cooling water line;
• a chiller installed in the battery cooling water line between the second pump and the battery module and connected to a refrigerant line of an air-conditioning device through a refrigerant connection line to adjust a temperature of the cooling water through heat exchange between the cooling water supplied from the battery cooling water line and the refrigerant supplied from the air-conditioning device through the refrigerant connection line;
• a first cooling water connection line having a first end connected to the cooling water line between the at least one electric part and the radiator and a second end connected to the battery cooling water line between the battery module and the second pump to allow the cooling water passing through the at least one electric part to flow into the battery cooling water line through the battery cooling water line;
• and
• a second cooling water connection line having a first end connected to the battery cooling water line between the battery module and the second pump and a second end connected to the first valve to allow the cooling water passing through the battery module to flow into the cooling water line through the first valve,
• wherein the first valve is a 3-way valve and is installed on the cooling water line between the radiator and the first pump to form an independent closed circuit in which the cooling water is circulated in each of the cooling circuit and the battery cooling circuit or an integrated closed circuit in which the cooling water is circulated in both the cooling circuit and the battery cooling circuit by operation of the first valve.