Oil Temperature Control System for Electric Vehicle

An oil temperature control system for an electric vehicle, the system comprising:

• a heat exchange unit configured to perform heat exchange between an oil used to cool a driving motor and a coolant in the electric vehicle;
• a temperature sensor comprising an oil temperature sensor configured to detect a temperature of the oil in the driving motor or an outside air temperature sensor configured to detect a temperature of outside air;
• a controller configured to receive a signal from the temperature sensor to determine, based on the temperature detected by the temperature sensor, whether a heat generation mode entry condition to cause a power electronic part to generate heat is satisfied and to operate the power electronic part in a heat generation mode in response to a determination that the heat generation mode entry condition is satisfied;
• and
• a cooling system configured to allow the coolant used to cool the power electronic part operating in the heat generation mode to circulate through a passage penetrating the heat exchange unit so that the coolant exchanges heat with the oil in the heat exchange unit, wherein the cooling system comprises:
• a radiator configured to dissipate heat from the coolant;
• a water pump configured to circulate the coolant along a coolant line;
• a bypass line branching from the coolant line to allow the coolant bypassing the radiator to flow therethrough;
• and
• a flow control valve configured to control a flow of the coolant such that the coolant circulates along the bypass line without passing through the radiator, wherein, upon entering the heat generation mode, the controller is configured to control the flow control valve such that the coolant flows along the bypass line without passing through the radiator.