A redox flow battery and battery system are provided. In one example, the redox flow battery includes a cell stack assembly having a plate assembly positioned on a lateral side of the cell stack assembly and comprising an elastic flange including a recess mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction, and a plate frame coupled to the elastic flange.

A redox flow battery and battery system are provided. In one example, the redox flow battery includes a cell stack assembly having a plate assembly positioned on a lateral side of the cell stack assembly and comprising an elastic flange including a recess mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction, and a plate frame coupled to the elastic flange.

A checking method of a resin-framed membrane electrode assembly includes checking whether there is breakage in one of short sides of a first rectangular peripheral shape of a clearance provided in the resin-framed membrane electrode assembly without checking whether there is breakage in any other part of the clearance, the resin-framed membrane assembly including a solid polymer electrolyte membrane, a gas diffusion layer provided on the solid polymer electrolyte membrane, and a resin frame member that has a second rectangular peripheral shape and surrounds the solid polymer electrolyte membrane and the gas diffusion layer to provide the clearance between the resin frame member and the gas diffusion layer, the solid polymer electrolyte membrane being made from a solid polymer electrolyte membrane roll in which a solid polymer electrolyte membrane sheet is wound in a winding direction, long sides of the rectangular peripheral shape extending in the winding direction.

A checking method of a resin-framed membrane electrode assembly includes checking whether there is breakage in one of short sides of a first rectangular peripheral shape of a clearance provided in the resin-framed membrane electrode assembly without checking whether there is breakage in any other part of the clearance, the resin-framed membrane assembly including a solid polymer electrolyte membrane, a gas diffusion layer provided on the solid polymer electrolyte membrane, and a resin frame member that has a second rectangular peripheral shape and surrounds the solid polymer electrolyte membrane and the gas diffusion layer to provide the clearance between the resin frame member and the gas diffusion layer, the solid polymer electrolyte membrane being made from a solid polymer electrolyte membrane roll in which a solid polymer electrolyte membrane sheet is wound in a winding direction, long sides of the rectangular peripheral shape extending in the winding direction.

A power generation cell of a fuel cell stack includes a resin frame equipped MEA and a first metal separator and a second metal separator. In the power generation cell, the relationship of P1>P2>P3 is satisfied, where P1 indicates a first surface pressure applied from a first seal part and a second seal part to a resin frame member, P2 indicates a second surface pressure applied from a first support part and a second support part to the overlap part, and P3 indicates a third surface pressure applied from first flow field forming protrusions and second flow field forming protrusions to the power generation area.

The invention relates to a distribution structure (10) for providing at least one reaction gas, in particular a gas mixture containing oxygen (O2), for a fuel cell (100) or an electrolyser, having a first structure element (11) and a second structure element (12), wherein the first structure element (11) and the second structure element (12) are designed and arranged with respect to one another such that: a distribution area (15) for the reaction gas is formed between the first structure element (11) and the second structure element (12); a plurality of feed channels (16) branch off from the distribution area (15) and are orientated substantially perpendicular to the distribution area (15); and a plurality of discharge channels (17) are formed below the second structure element (12) and are orientated parallel to the distribution area (15).

A redox flow battery and battery system are provided. In one example, the redox flow battery includes a cell stack assembly having a plate assembly positioned on a lateral side of the cell stack assembly and comprising an elastic flange including a recess mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction, and a plate frame coupled to the elastic flange.

A redox flow battery and battery system are provided. In one example, the redox flow battery includes a cell stack assembly having a plate assembly positioned on a lateral side of the cell stack assembly and comprising an elastic flange including a recess mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction, and a plate frame coupled to the elastic flange.

Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system has a set of pressure plates with a sub-stack separator plate arranged between the first pressure plate and the second pressure plate and a first cell stack positioned between the first pressure plate and the sub-stack separator plate. The redox flow battery system may further include a second cell stack positioned between the second pressure plate and the sub-stack separator plate.

A fuel cell FC that includes a cell structure including an anode electrode, a cathode electrode, and an electrolyte that intervenes between the anode electrode and the cathode electrode; and a pair of separators that forms an anode gas flow area and a cathode gas flow area between the cell structure and an anode-side separator and a cathode-side separator of the pair of separators, respectively. The fuel cell further includes a first sealing portion and a second sealing portion that are disposed on an anode electrode side of the cell structure to enclose respectively the anode gas flow area and an outer periphery of the first sealing portion. A flow path for oxygen-containing gas is formed between the first sealing portion and the second sealing portion.