Abstract: An apparatus for controlling driving of a fuel cell vehicle and a method thereof are provided. The apparatus includes a fuel cell stack that generates electricity using a chemical reaction between hydrogen and oxygen and a pressure sensor that measures a pressure of hydrogen supplied to the fuel cell stack. A controller determines whether a current limit is caused by a failure of the fuel cell stack or a measurement error of the pressure sensor when the current limit occurs in the fuel cell stack.

Abstract: A system for maintaining insulation resistance of a fuel cell includes a fuel cell stack, a coolant line that allows coolant to pass through the fuel cell stack, a circulation pump that circulates the coolant in the coolant line, a deionizer that removes impurities or ions from the coolant in the coolant line, and a controller configured to measure the insulation resistance of a high-voltage terminal connected to the fuel cell stack, to determine whether recovery control is necessary based on the measured insulation resistance, and upon determining that recovery control is necessary, to control the circulation pump so as to change the flow of the coolant passing through the deionizer.

Abstract: An apparatus for controlling driving of a fuel cell vehicle and a method thereof are provided. The apparatus includes a fuel cell stack that generates electricity using a chemical reaction between hydrogen and oxygen and a pressure sensor that measures a pressure of hydrogen supplied to the fuel cell stack. A controller determines whether a current limit is caused by a failure of the fuel cell stack or a measurement error of the pressure sensor when the current limit occurs in the fuel cell stack.

Abstract: A stop control method for a fuel cell system of a vehicle can include: determining whether a fuel cell of the fuel cell system is shut down when a key-off signal is received; comparing a voltage of the fuel cell with a first set voltage when it is determined that the fuel cell is not shut down; controlling a voltage of a high-voltage terminal downwardly when the voltage of the fuel cell is larger than the first set voltage; turning on a cathode oxygen depletion (COD) relay a first time after controlling the voltage of the high-voltage terminal downwardly; turning off a high-voltage terminal relay a first time after turning on the COD relay, the high-voltage relay disposed between the fuel cell and the high-voltage terminal; and shutting down the fuel cell and performing key-off control after turning off the high-voltage terminal relay.

Abstract: A system for maintaining insulation resistance of a fuel cell includes a fuel cell stack, a coolant line that allows coolant to pass through the fuel cell stack, a circulation pump that circulates the coolant in the coolant line, a deionizer that removes impurities or ions from the coolant in the coolant line, and a controller configured to measure the insulation resistance of a high-voltage terminal connected to the fuel cell stack, to determine whether recovery control is necessary based on the measured insulation resistance, and upon determining that recovery control is necessary, to control the circulation pump so as to change the flow of the coolant passing through the deionizer.

Abstract: A stop control method for a fuel cell system of a vehicle can include: determining whether a fuel cell of the fuel cell system is shut down when a key-off signal is received; comparing a voltage of the fuel cell with a first set voltage when it is determined that the fuel cell is not shut down; controlling a voltage of a high-voltage terminal downwardly when the voltage of the fuel cell is larger than the first set voltage; turning on a cathode oxygen depletion (COD) relay a first time after controlling the voltage of the high-voltage terminal downwardly; turning off a high-voltage terminal relay a first time after turning on the COD relay, the high-voltage relay disposed between the fuel cell and the high-voltage terminal; and shutting down the fuel cell and performing key-off control after turning off the high-voltage terminal relay.