Device for controlling fail-safe of hybrid vehicle and method thereof

A device for controlling fail-safe of a hybrid vehicle including an engine and a drive motor as driving sources, the device comprising:

• a hybrid starter and generator (HSG) engaged to the engine and operating as a motor to perform start on/off of the engine, and operating as a generator in a start on state of the engine;
• an electric oil pump to supply oil to a transmission and an engine clutch;
• an operation information detector to detect operating information on the hybrid vehicle;
• a hybrid controller to control operation of the vehicle based on the general operation information received from the operation information detector, and to control running of the hybrid vehicle in a fail-safe mode when a main relay is opened due to failure of a high voltage component;
• and
• an oil pump controller to drive the electric oil pump for supplying oil pressure proper to an operation condition to the transmission and the engine clutch, wherein the oil pump controller is electrically connected to the hybrid controller,
• wherein the oil pump controller controls a drive of the electric oil pump stage by stage with a generation amount of the HSG or the driver motor to generate the oil pressure when the oil pump controller recognizes that the hybrid controller proceeds to the fail-safe mode due to the failure of the high voltage component.