摘要:
Bipolar plate for a fuel cell, of the type comprising a cathode bipolar half-plate and an anode bipolar half-plate which are secured to each other, each bipolar half-plate (1) being constituted by a plate which comprises, in the central portion thereof, an active zone (2) and, at the peripheral portion thereof, a plurality of cut-outs (5) which are intended to constitute at least two oxidant units, at least two fuel units and at least two heat-exchange fluid units, at least one bipolar half-plate (1) comprising at least one connection between a peripheral cut-out (5) and the active zone (2), and comprising, at the periphery thereof, at least one hollow housing (140) which is intended to receive a connector (141) for electrical measurement.
摘要:
The invention mainly concerns a fuel cell seal (52) designed to be affixed on a bipolar plate (22) in the form of a membrane whereof the profile corresponds approximately to the peripheral frame (50) of the bipolar plate (22) and comprising a central opening (66) coinciding approximately with the central zone (46) dispensing the reagents of the bipolar plate (22). The invention also concerns a fuel cell comprising an electrode membrane assembly (70) which includes in particular an active region (74), which is the site of anode and cathode reactions, and a peripheral frame (75) and which is sandwiched between two bipolar plates (22) whereon is affixed the inventive seal (52).
摘要:
The invention concerns a monopolar fuel cell endplate (4) of the type with proton exchanging membrane consisting of a cathode or anode monopolar half-plate (41) attached to a closure plate (42). The monopolar half-plate comprises, in its central part, a cathode or anode active region (411), and, at its periphery, at least two oxidant boxes, if the monopolar half-plate is cathodic, or fuel boxes, if the monopolar half-plate is anodic. Each oxidant or fuel box comprises at least one channel (414) emerging outside the active region (411) to enable oxidant or fuel to be circulated outside the monopolar plate on the monopolar plate side, the oxidant or fuel boxes not comprising an opening emerging into the central region of the closure plate, such that the central part of said closure plate is not swept either with fuel or with oxidant.
摘要:
A fuel-cell stack including a stack of fuel cells with intermediate conductive bipolar plates. The bipolar plates include internal flow channels for flow of a heat-transfer fluid. The channels are connected to a circuit of a cooling system. Only some of the bipolar plates include internal flow channels that are temporarily or permanently not in service.
摘要:
The invention relates to a fluid delivery head for an electrochemical cell, for example a fuel cell. The delivery head combines the inlets and outlets of the lines for delivering the fluids, notably hydrogen and oxygen. The hydrogen delivery line feeds an active part of the fuel cell and includes a cavity in communication with a discharge pipe via a solenoid valve. The invention performs several functions with a minimum of elements and with reduced bulk.
摘要:
The invention relates to a fuel cell bipolar plate (22) comprising at least one ridge (47, 23a, 33a, 40a, 27a, 35a, 41a, 23a) on at least one of the faces (51) thereof, such as seal at least one fluid circuit in the cell from among the oxidant, fuel and coolant inlet circuits and the oxidant, fuel and coolant outlet circuits, said circuits being formed by stacking openings which are provided in the plate (22) and which form an inlet and an outlet for the oxidant and the fuel (33, 40, 35, 41) respectively and openings which form an inlet and an outlet for the coolant (23, 27) respectively during the assembly of the constituent cells (1) of the fuel cell.
摘要:
The invention concerns a bipolar plate for fuel cell, of the type comprising a cathode bipolar half-plate and an anode bipolar half-plate attached to each other, each bipolar half-plate (1) consisting of a plate including in its central part an active region (2) and at its peripheral part a plurality of cut-outs (4) designed to form at least two oxidant boxes, at least two fuel boxes and at least two coolant boxes, the bipolar plate including at least one connecting channel between each peripheral cut-out and the active region. The invention is characterized in that each connecting channel of a peripheral cut-out with the active region consists of at least one rib (8) in a bipolar half-plate.
摘要:
The electric power source comprises a fuel cell and at least one flow channel the inlet and outlet whereof are respectively connected to a reactive fluid source and to a tank designed to contain the reactive fluid feeding the fuel cell and the water produced by the fuel cell. An inlet valve is arranged between the reactive fluid source and the inlet of the flow channel and is controlled by a control device. Once the tank has been filled with reactive fluid, the inlet valve is closed for a predetermined first time period. It is then opened for a predetermined second time period so as to evacuate the water accumulated in the fuel cell during the first time period to the tank, and to refill the tank with reactive fluid.
摘要:
A bipolar plate for a fuel cell including a first through-hole positioned within one of its peripheral edges for circulating a reactive fluid, an anode compartment extending at one of its two main faces, and a cathode compartment extending at the opposite main face. At least one of the compartments is formed completely or partially by a region recessed with respect to the corresponding main face. The recessed region is connected to the through-hole via an intake channel that is recessed within the peripheral edge of the corresponding main face for the reactive fluid to flow into the compartment. A second through-hole located near the first through-hole is provided and is intended for circulating the reactive fluid. The main face opposite the face housing the recessed region comprises a generally non-emergent groove that connects the first and second through-holes.
摘要:
Flat fuel cell comprising at least two unit cells, a casing provided with supports for each of said unit cells, said supports offering a bearing surface to a periphery of the unit cells, sealing means interposed between the periphery of each unit cell and the surface of an associated support, and a cover forming a compression element coming into abutment on the periphery of each unit cell opposite the sealing means and cooperating directly with the associated support in order to provide compression of the sealing means.