A bipolar plate of an electrochemical cell, including a first conductive sheet and a second conductive sheet, wherein at least one first distribution channel of a first conductive sheet and one second distribution channel of a second conductive sheet each include at least one portion, referred to as a superposed portion, where they are superposed onto one another and make mutual contact via their respective back walls, and at least one portion, referred to as a reinforcement portion, where they make contact, via their respective back walls, with a dividing rib of the opposite conductive sheet.

The invention pertains to a bipolar plate in which each of the distribution channels is located facing a dividing rib of the opposite conductive sheet; and in which said distribution channels include portions of various depths that are arranged so as to form a longitudinal alternation between: an enhanced distribution zone, in which: the distribution channels have a combined cross section of a high distribution value, and the cooling channels have a combined cross section of a low cooling value; and an enhanced cooling zone, in which: the distribution channels have a combined cross section of a value that is lower than the high distribution value, and the cooling channels have a combined cross section of a value that is higher than the low cooling value.

A fuel cell includes a resin-framed membrane electrode assembly, first and second separators, and a resin frame member. The resin frame member is provided to surround an outer periphery of a solid polymer electrolyte membrane. The first and second separators sandwich the resin-framed membrane electrode assembly therebetween in a stacking direction to define a reactant gas flow channel between each of the first and second separators and the resin-framed membrane electrode assembly. The first and second separators include a reactant gas manifold hole which passes through the first and second separators in the stacking direction. The resin frame member includes a bridge portion having connecting flow channels connecting the reactant gas flow channel and the reactant gas manifold hole. At least one of the connecting flow channels has a sloped surface.

A fuel cell includes a resin-framed membrane electrode assembly, first and second separators, and a resin frame member. The resin frame member is provided to surround an outer periphery of a solid polymer electrolyte membrane. The first and second separators sandwich the resin-framed membrane electrode assembly therebetween in a stacking direction to define a reactant gas flow channel between each of the first and second separators and the resin-framed membrane electrode assembly. The first and second separators include a reactant gas manifold hole which passes through the first and second separators in the stacking direction. The resin frame member includes a bridge portion having connecting flow channels connecting the reactant gas flow channel and the reactant gas manifold hole. At least one of the connecting flow channels has a sloped surface.

A fuel cell to provide a higher power density. The fuel cell can be produced by 3D printing in ceramic and has an improved power density by virtue of its spiral shape. In order to better extract the energy generated by the fuel cell, an interconnector sheet can be fastened positively to fastening knobs of the fuel cell by holding eyes. In addition, the interconnector sheet can be fixed by glass solder.

A fuel cell to provide a higher power density. The fuel cell can be produced by 3D printing in ceramic and has an improved power density by virtue of its spiral shape. In order to better extract the energy generated by the fuel cell, an interconnector sheet can be fastened positively to fastening knobs of the fuel cell by holding eyes. In addition, the interconnector sheet can be fixed by glass solder.

An electrochemical reactor including: a diaphragm/electrodes assembly; at least one first reinforcement attached to one of the surfaces of the diaphragm and surrounding either the anode or the cathode; a conductive bipolar plate including a first flow manifold passing therethrough, one first surface including flow channels from a cathode reactive area and moreover including cathode homogenization channels placing the cathode reactive area in communication with the first collector; and at least one element from among the diaphragm and the first reinforcement not covering the cathode homogenization channels, depth of the cathode homogenization channels being greater than depth of the flow channels of the cathode reactive area.

A device (10) for use in a fuel cell includes a fuel-cell flow-field channel (18) having a channel-inlet section (42) and a channel-outlet section (44). At least one of the channel-inlet section (42) or the channel-outlet section (44) includes an obstruction member (46) that partially blocks flow through the fuel-cell flow-field channel (18).

Redox flow battery includes cell frame 20 including frame body 21 and bipolar plate 23, frame body 21 having rectangular opening 22 divided into a plurality of small openings 22a-22c along first direction X parallel to a longitudinal direction of opening 22, bipolar plate 23 divided into a plurality of regions 23a-23c, each of regions 23a-23c disposed within each of small openings 22a-22c to form a plurality of recesses, and electrode 11 divided into a plurality of regions 11a-11c, each of regions 11a-11c received in each of the recesses, wherein each of small openings 22a-22c has a rectangular shape whose longitudinal direction is parallel to first direction X.

Redox flow battery includes cell frame 20 including frame body 21 and bipolar plate 23, frame body 21 having rectangular opening 22 divided into a plurality of small openings 22a-22c along first direction X parallel to a longitudinal direction of opening 22, bipolar plate 23 divided into a plurality of regions 23a-23c, each of regions 23a-23c disposed within each of small openings 22a-22c to form a plurality of recesses, and electrode 11 divided into a plurality of regions 11a-11c, each of regions 11a-11c received in each of the recesses, wherein each of small openings 22a-22c has a rectangular shape whose longitudinal direction is parallel to first direction X.