Patent ID: 8689741

Claim:
A thermal management system for a hybrid electric vehicle, comprising: a heater core that supplies heat for heating the interior of a vehicle by heat exchange between a coolant passing through an engine and air to be supplied to the interior of the vehicle; a heat exchanger in which heat exchange between a heat exchange medium passing through a drive component and the coolant is performed; a coolant line for allowing the coolant to pass through the engine, the heater core, and the heat exchanger; a coolant pump installed in the coolant line; a heat exchange medium line for allowing the heat exchange medium to be circulated through the heat exchanger and the drive component; and a bypass valve installed in the coolant line at a coolant inlet or a coolant outlet of the engine, the bypass valve being selectively opened and closed by a controller according to the on/off state of the engine, wherein the coolant line is branched into two branched lines between the engine and the coolant pump such that one of the branched lines is connected to the coolant inlet of the engine and the other is connected to an inlet of the heat exchanger, and the coolant line connected to an outlet of the heat exchanger is joined with the coolant line connected to the coolant outlet of the engine and is connected to an inlet of the heater core, and wherein the bypass valve is controlled such that the coolant does not pass through the engine but passes through only the heat exchanger when the engine is stopped and the coolant heated by the heat exchanger and to be supplied to the heater core to heat the interior of the vehicle is prevented from being cooled by the engine.