The invention relates to a method for operating a fuel cell arrangement which has a fuel cell for providing electrical energy in a circuit, at least one fuel cell auxiliary unit, the circuit electrically connected to the fuel cell via a DC-DC converter, and a battery. In this case, it is provided that, in order to place the fuel cell into operation, the battery be electrically connected to the circuit and the fuel cell auxiliary unit be operated with electrical energy drawn from the battery, wherein the battery is electrically disconnected from the circuit, and the DC-DC converter is operated in non-clocked mode in at least one operating mode of the fuel cell arrangement after placement into operation. The invention further relates to a fuel cell arrangement.

In order to provide a fuel cell powered vehicle testing system capable of performing a test of a power system of a fuel cell powered vehicle by a simpler facility, includes: a dynamometer which is connected to an output shaft of an electric motor mounted on a fuel cell powered vehicle for applying a simulation travelling load to the electric motor; and a supply power simulator adapted to simulate an operation of the fuel cell mounted on the fuel cell powered vehicle and to apply power to the electric motor, the power being to be supplied from the fuel cell to the electric motor.

An air-cooled fuel-cell vehicle includes: a drive motor for the vehicle; an air-cooled fuel cell; an intake duct which is placed on a vehicle front side relative to the fuel cell and guides air to the fuel cell; an air-intake shutter mechanism which opens and closes the intake duct; a storage chamber provided on the vehicle front side relative to a passenger compartment of the vehicle and accommodates the fuel cell, the intake duct, and the air-intake shutter mechanism; a controlling portion which controls the air-intake shutter mechanism; and a collision detector which detects a front collision of the vehicle. The controlling portion controls the air-intake shutter mechanism to a closed side when the front collision of the vehicle is detected, and the intake duct includes a tubular metal plate portion or a resin portion containing an elastomer component.

An exhaust system is provided for a device having at least one fuel cell. The exhaust system includes at least one exhaust duct for transporting anode-side and/or cathode-side exhaust gas of the fuel cell, at least one air inlet for supplying air, at least one air feeding device for feeding in the supplied air, at least one heat exchanger for heating up the supplied air, a mixing region for mixing exhaust gas of the fuel cell transported by way of the exhaust duct with the supplied air and forming a mixed exhaust gas, and a mixed exhaust gas outlet for carrying the mixed exhaust gas away from the exhaust system.

A vehicle includes a system main relay, a first voltage converter, a second voltage converter, a first diode disposed in a third power line and configured to prevent a reverse flow of a current from the first auxiliary machine to the auxiliary machine battery, and a second diode disposed in a second power line and configured to prevent a reverse flow of a current from the first auxiliary machine to the second voltage converter. Therefore, according to the vehicle, even when the auxiliary machine battery is short-circuited, the first diode can prevent a reverse flow of a current and the second voltage converter can continuously supply electric power to the first auxiliary machine.

A fuel cell vehicle includes a fuel cell stack, a tank, a discharge flow path discharging a fluid discharged from the fuel cell stack, a muffler attached to the discharge flow paths, and a vehicle member defining a first chamber and a second chamber, the first chamber accommodating the fuel cell stack and the second chamber being disposed behind the first chamber and accommodating the tank and the muffler. The second chamber is also provided with a front portion and a rear portion continuous with the front portion, the rear portion being shorter than the front portion in average length in a vehicle width direction. The muffler is disposed between the tank and one of a pair of side wall portions defining side walls of the front portion in the vehicle width direction.

A fuel cell vehicle comprises a fuel cell module, a vehicle body frame, a plurality of mounting portions and a tank. A front portion of the vehicle body frame that a front side mounting portion is attached to is configured to be movable upward in a vehicle height direction when a load is applied in the vehicle longitudinal direction. A rear side mounting portion configured to mount a rear side of the fuel cell module in the vehicle longitudinal direction to the vehicle body frame is configured to be more easily breakable, compared with the front side mounting portion, when the load is applied in the vehicle longitudinal direction.

A thermal management system of a fuel cell vehicle includes a cold start loop which heats a coolant that flows through a fuel cell during a cold start of the fuel cell, and a cooling loop which moves a coolant that cools the fuel cell.

There is provided a fuel cell vehicle equipped with a fuel cell. The fuel cell vehicle comprises a fuel gas supply piping located in floor of the fuel cell vehicle and configured to supply a fuel gas to the fuel cell; an exhaust drainage piping located under the floor and configured to discharge an exhaust gas and water from the fuel cell; a muffler located below the fuel gas supply piping in a direction of gravity and connected with the exhaust drainage piping; and an undercover located below the muffler and provided to cover the floor, the undercover having a gap along a front-rear direction of the fuel cell vehicle formed between a front wheel of the fuel cell vehicle. The muffler is placed on any straight line that passes through the fuel gas supply pipe and that connects any point of a contact area in which the front wheel is in contact with ground surface with the gap in a view of a left-right direction of the fuel cell vehicle.

An embodiment fuel cell module includes a fuel cell, a power distribution unit disposed above the fuel cell, the power distribution unit including a concave portion, and a cable configured to be connected to a connector of the power distribution unit within the concave portion. The power distribution unit according to an embodiment includes a front surface, a rear surface located opposite the front surface in a first direction, and first and second side surfaces facing each other in a vehicle width direction between the front surface and the rear surface, the vehicle width direction being a direction intersecting the first direction. In an embodiment, the connector is disposed on the first side surface or the second side surface to be connected to the cable.