Power net apparatus of a fuel cell and control method thereof

A control method for a power net apparatus for a fuel cell, including a fuel cell configured to supply power to an inverter of a vehicle, a supercapacitor configured to assist the fuel cell, a bidirectional converter configured to charge and discharge the fuel cell and the supercapacitor, and a switching device for distinguishing driving modes for the vehicle, the method comprising:

• driving, by a controller, the vehicle by controlling the supercapacitor to charge or discharge by controlling the switching device and the bidirectional converter according to driving modes for the vehicle, and by assisting the fuel cell;
• wherein the driving modes for the vehicle include:
• a first mode configured to perform a precharge operation to charge the supercapacitor through the fuel cell in response to starting the vehicle;
• a second mode configured to transfer power to the inverter through an independent operation of the fuel cell in response to driving the vehicle;
• and
• a third mode configured to transfer power to the inverter and charges the supercapacitor through the independent operation of the fuel cell in response to the vehicle.