A method for at least partially compensating for a temperature-induced rise in pressure in a fuel-cell system includes providing a fuel-cell system that has an anode supply path that establishes a fluidic connection between a fuel-cell stack and at least one fuel-source, and an anode-side stack shut-off valve in the anode supply path, the anode-side stack shut-off valve prohibiting the supply of fuel to the fuel-cell stack from an anode section of the anode supply path. The fuel-cell system also has an excess-pressure valve in the anode section, the excess-pressure valve conducting fuel away out of the anode section if the pressure in the anode section exceeds a tripping pressure. In the shut-down state, the pressure in the anode section rises due to warming of the fuel. The anode-side stack shut-off valve is opened to relieve the pressure before the rising pressure in the anode section reaches the tripping pressure.

The invention concerns a vehicle comprising an electricity production unit configured for generating an electrical current, a transformer unit and a fuel storage unit, the production unit comprising at least two fuel cell stacks and a single first electrical connection interface for transmitting the electrical current to the transformer unit. The production unit further comprises a single cooling circuit, an air supply circuit and a single gaseous hydrogen supply circuit for supplying gaseous hydrogen, from the fuel storage unit, to each fuel cell stack. The production unit is separate from the fuel storage unit and connected to the fuel storage unit by a single connection interface, the production unit being removable from the vehicle as an integrated unit independently from the fuel storage unit.

In order to provide a fuel cell device which can be produced simply and cost-effectively, it is proposed that the fuel cell device comprises the following: a plurality of fuel cell elements which are stacked one on top of another along a stacking direction and form a fuel cell stack; a clamping device for securing the fuel cell elements; a fluid guide unit for supplying fuel and/or oxidizer and/or coolant to the fuel cell elements and/or for removing fuel and/or oxidizer and/or exhaust gas and/or coolant from the fuel cell elements, wherein the clamping device comprises two or more crossmembers which extend at least approximately perpendicularly to the stacking direction, wherein in each case at least one crossmember is arranged at each end of the fuel cell stack, wherein the crossmembers can be drawn towards one another by means of clamping elements and the fuel cell stack can thereby be clamped between the crossmembers.

A mobile hydrogen fueling system for use in fueling mobile hydrogen vehicles includes: a towing vehicle with a hydrogen powered fuel cell that powers the towing vehicle, and a trailer. The trailer includes a hydrogen storage tank, a hydrogen fuel transport device such as a gas compressor or a liquid pump, and a dispenser attached to the hydrogen tank that dispenses hydrogen to a receiving hydrogen tank. A controller regulates the hydrogen fuel transport device and thus the flow of hydrogen that the dispenser dispenses.

A service providing mobile unit 1 comprised of a frame 2 forming a ring shape about a horizontal axis, movement-use wheels 4, 5 attached to the bottom part of the frame 2, a hydrogen storage tank insert pan 10 formed inside the frame 2, and a fuel cell 40 arranged inside the frame 2. Hydrogen is supplied to the fuel cell 40 from a replaceable hydrogen storage tank 20 inserted into the hydrogen storage tank insert part 10. A service providing space 3 having a ring-shaped inner circumference surface of the frame 2 as its outer edges is formed by the frame 2, and power can be supplied from the fuel cell 40 to a service providing unit installed inside the service providing space 3.

A hydrogen storage apparatus of a vehicle driven by a fuel cell comprising hydrogen storage tank holding apparatuses 8, 9 having pluralities of hydrogen storage tank insert parts 10. When the replaceable hydrogen storage tank 20 is inserted into the hydrogen storage tank insert part 10, the hydrogen outflow part 28 of the hydrogen storage tank 20 is coupled with the hydrogen inflow part 23 connected to the fuel cell 40. The grippable handle 24 is formed at the end portion of the hydrogen storage tank 20. A work of inserting the hydrogen storage tank 20 into the hydrogen storage tank insert part 10 and a work of coupling the hydrogen inflow part 23 and the hydrogen outflow part 28 is performed by gripping the handle 24.

A power source includes a container, a fuel cell stack disposed within the container, the fuel cell stack having an anode side and a cathode side, a hydrogen producing fuel disposed within the container and positioned to provide hydrogen to anode side of the fuel cell stack, and a pump disposed within the hydrogen producing fuel to circulate water vapor through the hydrogen producing fuel. A capacitor may be coupled to receive electricity generated by the fuel cell stack.

A service providing mobile unit comprising the frame 2, movement-use wheels 4, 5 provided at the bottom part of the frame 2, hydrogen storage tank insert parts 10 formed inside the frame 2, and the fuel cell 40 arranged in the frame 2. A service for supplying hydrogen to the fuel cell 40 from the hydrogen storage tank 20 inserted in the hydrogen storage tank insert part 10, a service for lending out the hydrogen storage tank 20 inserted in the hydrogen storage tank insert part 10, a service for returning a used hydrogen storage tank 20 to the hydrogen storage tank insert part 10, and a service for storing the hydrogen storage tank 20 inserted into the hydrogen storage tank insert part 10 are provided.

A power supply device includes: a main body configured mountable to a roof of a vehicle; a tank insertion hole formed in the main body for detachable insertion of a hydrogen tank; a fuel cell stack provided inside the main body and configured to generate electricity by being supplied with hydrogen from the hydrogen tank attached to the main body; and an output section provided on an outer face of the main body to output power generated by the fuel cell stack.

A valve control unit of a gas supply system acquires a gas pressure of gas supplied to a gas consumption device and a first tank temperature, determines a first pressure threshold value associated with the first tank temperature, closes a first valve to shut off gas from a first tank to the gas consumption device if the gas pressure is less than the first pressure threshold value, and opens the first valve to resume gas supply from the first tank to the gas consumption device after the first valve is closed and if the first tank temperature rises to a first predetermined temperature.