Patent ID: 8676416

Claim:
A method for starting a fuel cell vehicle in an emergency, the method comprising: if a start-up of a fuel cell system is detected, by a computer-implemented controller, determining, via a failure detector, whether there is a malfunction in a high voltage system, the high voltage system including a high voltage DC/DC converter and a high voltage battery; if it is determined that there is a failure or malfunction in the high voltage system, turning on by the computer-implemented controller, a switch provided in a circuit between an output terminal of a low voltage battery and an air blower, such that the air blower is driven by a voltage output from the low voltage battery; and supplying air to a fuel cell by driving the air blower according to the voltage applied from the low voltage battery, wherein the failure detector detects a voltage output from the high voltage system to the air blower via a voltage sensor provided in a high voltage bus; wherein the controller determines that the high voltage system is a failure and turns on the first and second switches, if the voltage of the high voltage bus detected by the voltage sensor is lower than a predetermined reference voltage V 1 ; wherein the controller determines that the high voltage system is not a failure and maintains the first and second switches, if the voltage of the high voltage bus detected by the voltage sensor is higher than the reference voltage V 1 .