System and method for controlling start of fuel cell vehicle

A system for controlling a start of a fuel cell vehicle, comprising:

• a memory configured to store program instructions;
• and
• a processor configured to execute the program instructions, the program instructions when executed configured to:
• provide hydrogen and air to a fuel cell;
• operate a converter to maintain a voltage of a high voltage bus to be constant,
• wherein the converter is disposed between a high-voltage battery and the high voltage bus to which an output stage of the fuel cell is connected, and the voltage of the high voltage bus becomes a preset lowest control voltage;
• set a charge current of the high-voltage battery as a charge limit current;
• adjust an air supply amount to the fuel cell and operate the converter to provide a current that corresponds to an amplitude of the charge limit current to the high-voltage battery;
• and
• charge the charge limit current based on a result of comparing a sensed charge current obtained by sensing a current input to the high-voltage battery, with the charge limit current.