Thermal management system for vehicle

A thermal management system for a vehicle, the thermal management system comprising:

• a battery line connected to a battery core and configured to make cooling water flow therein by a first pump;
• an indoor heating line connected to a heating core for indoor air conditioning, mounted with a water heating heater therein, and mounted with a second pump to make cooling water flow therein;
• a first battery heating line and a second battery heating line branched from a first valve mounted at a downstream point of the heating core of the indoor heating line and connected to an upstream point and a downstream point of the battery core of the battery line, respectively;
• a refrigerant line mounted with a first expansion valve, a cooling core for indoor air conditioning, a compressor, and an air-cooled condenser;
• and
• a first cooling water bypass line having a first end portion connected to a downstream point of an electronic component core of an electronic component line connected to the electronic component core, and a second end portion connected to an upstream point of the electronic component core of the electronic component line through a second valve.