THERMAL MANAGEMENT SYSTEM FOR A FUEL CELL VEHICLE

A thermal management system includes a first thermal management circuit including an electric heater for raising a temperature of stack cooling water supplied to a fuel cell stack, a second thermal management circuit including a chiller configured to facilitate heat exchange with battery cooling water supplied to a battery, a first cooling water branch line connecting a cooling water outlet of the electric heater and a first cooling water inlet of the chiller, a second cooling water branch line provided with a first end connected to a first cooling water outlet of the chiller and a second end connected to the first thermal management circuit, and the second cooling water branch line configured to supply stack cooling water discharged from the first cooling water outlet of the chiller to an upstream side of the electric heater.