Abstract: A system of fuel-cell stacks is provided. The system includes fuel-cell stacks, a circuit for supplying each fuel-cell stack with an oxidizing fluid, a circuit for supplying each fuel-cell stack with a reducing fluid, and a pressure-regulating device fitted to the supply circuits so as to regulate the fluid pressure in each fuel-cell stack. The pressure-regulating device includes a first line for controlling the fluid pressure and a second line for passing the fluid, these two lines being placed in parallel between an upstream channel delivering fluid from a supply circuit and downstream channels connected to each fuel-cell stack.

Abstract: A supply device for supplying at least one fuel is provided. The supply device includes a first fluid circuit and a second fluid circuit, the former to supply the/each fuel cell with fuel and the latter to supply the/each fuel cell with combustion agent. The first circuit includes a first supply line having a first solenoid valve and a first starter configured to allow for the circulation of fluid in the first circuit towards the/each fuel cell when the electrical control of the first solenoid valve is inoperative. The second circuit includes a second supply line having a second solenoid valve and a second starter configured to allow for the circulation of fluid in the second circuit towards the/each fuel cell when the electrical control of the second solenoid valve is inoperative. The supply device includes at least one pressure-actuated reducer arranged on the first circuit and actuated by a pressure in the second circuit.

Abstract: A system of fuel-cell stacks is provided. The system includes fuel-cell stacks, a circuit for supplying each fuel-cell stack with an oxidizing fluid, a circuit for supplying each fuel-cell stack with a reducing fluid, and a pressure-regulating device fitted to the supply circuits so as to regulate the fluid pressure in each fuel-cell stack. The pressure-regulating device includes a first line for controlling the fluid pressure and a second line for passing the fluid, these two lines being placed in parallel between an upstream channel delivering fluid from a supply circuit and downstream channels connected to each fuel-cell stack.