Abstract: A device for producing and storing dioxygen and/or dihydrogen is provided. The device includes a source of dioxygen and dihydrogen, and a high pressure tank to store the dioxygen, respectively dihydrogen, at high pressure, in fluid communication with the source. The device further includes a bypass line connecting an outlet of dioxygen, respectively of dihydrogen, of the source with an outlet of dioxygen, respectively of dihydrogen, of the production and storage device, bypassing the high pressure tank, the bypass line being fed through a pressure regulator to reduce the pressure in the bypass line; and a device for measuring the concentration of dihydrogen, respectively of dioxygen, in the dioxygen respectively in the dihydrogen produced by the source, the measuring device being arranged on the bypass line.

Abstract: The bipolar plate is thinner because it includes in a single plane all of the channels (21) for circulation of the oxidiser, the fuel and the coolant fluid (41). The feed plate, which is preferably made of a composite material, has on each of its faces (1A, 1B) a network of channels for the circulation either of oxidiser or fuel, which are supplied through feed apertures (2, 3) passing through the plate. Refrigeration is achieved by means of feed apertures (4) feeding into one or more refrigeration channels (41) positioned between the parts of the circulation channels (21) for the oxidiser or the fuel. Possible through passages (43) allow these different channels to pass from one face to the other so as to organise the circulation and the removal of these three fluids. It is thus possible to distribute the oxidiser and the fuel to both sides of the plate, while also arranging its refrigeration. Application to fuel cells of average and high power.

Abstract: The invention makes it possible to provide a seal at the level of the contact between each membrane-electrode element (1) with the supply plates (10). Sealing means produced either by means of a densification layer (20) or by means of a microporous material for forming the diffusion layers (3B, 4B), are arranged in the diffusion layers (3B, 4B) of the anode (3) and the cathode (4), respectively, opposite the open surface of the cooling channel (15) of each supply plate (10). Application in PEM fuel cells.

Abstract: The bipolar plate is thinner because it includes in a single plane all of the channels (21) for circulation of the oxidiser, the fuel and the coolant fluid (41). The feed plate, which is preferably made of a composite material, has on each of its faces (1A, 1B) a network of channels for the circulation either of oxidiser or fuel, which are supplied through feed apertures (2, 3) passing through the plate. Refrigeration is achieved by means of feed apertures (4) feeding into one or more refrigeration channels (41) positioned between the parts of the circulation channels (21) for the oxidiser or the fuel. Possible through passages (43) allow these different channels to pass from one face to the other so as to organise the circulation and the removal of these three fluids. It is thus possible to distribute the oxidiser and the fuel to both sides of the plate, while also arranging its refrigeration. Application to fuel cells of average and high power.