The disclosure relates to a bipolar plate for an electrochemical system, and to an electrochemical system comprising a plurality of bipolar plates. The electrochemical system may be, for example, a fuel cell system, an electrochemical compressor, a redox flow battery, or an electrolyser. The bipolar plate comprising separator plates, an inlet, and an outlet. A separator plate comprising an active region.

The disclosure relates to a bipolar plate for an electrochemical system, and to an electrochemical system comprising a plurality of bipolar plates. The electrochemical system may be, for example, a fuel cell system, an electrochemical compressor, a redox flow battery, or an electrolyser. The bipolar plate comprising separator plates, an inlet, and an outlet. A separator plate comprising an active region.

A multiple perforation plate for fuel cell separators includes virtual flow path hole central lines spaced apart from each other at a constant interval in a length direction corresponding to a flow direction of reaction gas and formed in a width direction perpendicular to the flow direction of the reaction gas, a plurality of flow path holes formed at a constant interval on the flow path hole central lines in the width direction, and expansion parts formed at both sides of a middle point of each of the flow path holes in the width direction so as to have a greater width in the length direction than that of other points of each of the flow path holes.

A cell stack device includes a manifold and a fuel cell. The manifold includes a gas supply chamber and a gas collection chamber. The fuel cell includes a support substrate and a power generation element portion. The support substrate includes first and second gas channels. The first gas channel is connected to the gas supply chamber, and the second gas channel is connected to the gas collection chamber. The first gas channel is open in the gas supply chamber at a proximal end portion. The second gas channel is open in the gas collection chamber at a proximal end portion. The first and second gas channels are connected to each other on the distal end portion side. The first and second gas channels are configured such that a pressure loss of gas in the first gas channel is smaller than a pressure loss of gas in the second gas channel.

A cell stack device includes a manifold and a fuel cell. The manifold includes a gas supply chamber and a gas collection chamber. The fuel cell includes a support substrate and a power generation element portion. The support substrate includes first and second gas channels. The first gas channel is connected to the gas supply chamber, and the second gas channel is connected to the gas collection chamber. The first gas channel is open in the gas supply chamber at a proximal end portion. The second gas channel is open in the gas collection chamber at a proximal end portion. The first and second gas channels are connected to each other on the distal end portion side. The first and second gas channels are configured such that a pressure loss of gas in the first gas channel is smaller than a pressure loss of gas in the second gas channel.

A fuel cell includes: an electrolyte membrane; first and second catalyst layers respectively formed on first and second surfaces of the electrolyte membrane; and a separator, the first catalyst layer being arranged between the separator and the electrolyte membrane, wherein the separator includes first and second grooves through which reactant gas flows between the first catalyst layer and the separator.

A bipolar plate for a fuel cell includes an anode plate and a cathode plate. The anode plate has hydrogen flow channels on a first side of the anode plate and coolant channels on a second side of the anode plate. The cathode plate has a first side disposed against the second side of the anode plate to cover the coolant channels and has a second side defining a recessed pocket configured to receive a stream of air. A flow guide is disposed in the pocket such that an inlet manifold is formed along a first edge of the flow guide and an outlet manifold is formed along a second edge of the flow guide. The flow guide defines channels extending from the inlet manifold to the outlet manifold. A plurality of openings is defined by through the flow guide.

A bipolar plate for a fuel cell includes an anode plate and a cathode plate. The anode plate has hydrogen flow channels on a first side of the anode plate and coolant channels on a second side of the anode plate. The cathode plate has a first side disposed against the second side of the anode plate to cover the coolant channels and has a second side defining a recessed pocket configured to receive a stream of air. A flow guide is disposed in the pocket such that an inlet manifold is formed along a first edge of the flow guide and an outlet manifold is formed along a second edge of the flow guide. The flow guide defines channels extending from the inlet manifold to the outlet manifold. A plurality of openings is defined by through the flow guide.

A bipolar plate formed from two single plates joined together, formed with a reactant flow field on their plate surfaces facing away from each other, comprises multiple flow ducts for a reaction medium, bounded by walls of webs herein the webs and the flow ducts of one of the single plates run opposite the webs and the flow ducts of the other of the single plates in an active region, thus forming coolant ducts of a coolant flow field extending between the single (8), the reactant flow fields and the coolant flow field being each connected fluidically to a media port across a distribution region situated outside the active region, and there being a cross channeling of the two reaction media for a portion in the distribution region. For the channeling of the coolant in the distribution region free of cross currents, at least one of the single plates may be formed with a reduction in height of the webs on its plate surface facing toward the other of the single plates in an intersection region of the reaction media channels, so that two adjacent flow ducts are fluidically connected by the reduction.

A bipolar plate formed from two single plates joined together, formed with a reactant flow field on their plate surfaces facing away from each other, comprises multiple flow ducts for a reaction medium, bounded by walls of webs herein the webs and the flow ducts of one of the single plates run opposite the webs and the flow ducts of the other of the single plates in an active region, thus forming coolant ducts of a coolant flow field extending between the single (8), the reactant flow fields and the coolant flow field being each connected fluidically to a media port across a distribution region situated outside the active region, and there being a cross channeling of the two reaction media for a portion in the distribution region. For the channeling of the coolant in the distribution region free of cross currents, at least one of the single plates may be formed with a reduction in height of the webs on its plate surface facing toward the other of the single plates in an intersection region of the reaction media channels, so that two adjacent flow ducts are fluidically connected by the reduction.