A fuel cell stack includes a coolant channel provided between a first separator of a first power generation cell among power generation cells and a second separator of a second power generation cell among the power generation cells which is adjacent to the first power generation cell. A coolant manifold is connected to the coolant channel. A coolant manifold end member is connected to the coolant manifold. The coolant manifold end member includes an air vent wall having an opening provided at an uppermost position of the coolant manifold end member in a height direction of the fuel cell stack. The coolant manifold end member includes a wall which surrounds the air vent wall and which is thinner than the air vent wall. The air vent pipe protrudes from the air vent wall. The air vent pipe and the coolant manifold end member are integrally made.

A fuel cell stack includes a coolant channel provided between a first separator of a first power generation cell among power generation cells and a second separator of a second power generation cell among the power generation cells which is adjacent to the first power generation cell. A coolant manifold is connected to the coolant channel. A coolant manifold end member is connected to the coolant manifold. The coolant manifold end member includes an air vent wall having an opening provided at an uppermost position of the coolant manifold end member in a height direction of the fuel cell stack. The coolant manifold end member includes a wall which surrounds the air vent wall and which is thinner than the air vent wall. The air vent pipe protrudes from the air vent wall. The air vent pipe and the coolant manifold end member are integrally made.

Certain fuel cell designs employ bipolar plate assemblies with internal coolant flow fields which comprise a coolant channel region and transition regions adjacent the coolant channel region. The temperature and/or pressure drop, and hence flow, of coolant over the coolant channel region can be non-uniform however, and this can have an adverse effect on cell performance. The coolant flow and temperature distribution can be modified and made more uniform by inserting an appropriate non-uniform porous insert in one or more of the coolant transition regions.

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.

A cell structure for a fuel cell including: power generation cell assemblies each including a power generation cell which includes a fuel electrode, an oxidant electrode, and an electrolyte sandwiched therebetween and is configured to generate power by using supplied gases; a separator configured to separate the adjacent power generation cell assemblies from each other; a sealing member disposed between an edge of a corresponding one of the power generation cell assemblies and an edge of the separator and configured to retain any of the gases supplied to the power generation cells between the corresponding power generation cell assembly and the separator; and a heat exchange part disposed adjacent to the sealing member and configured to perform temperature control of the sealing member by using any of the gases supplied to the power generation cells.

A fuel cell system that can prevent impurities from intensively collecting near inlets of fuel cells. The fuel cell system includes a fuel cell stack formed by stacking fuel cells, each fuel cell having a power generation portion, a stack manifold with a fuel gas inlet communication hole disposed at an end of the fuel cell stack in the stacking direction of the fuel cells, a mixed gas supply channel communicating with the fuel gas inlet communication hole for supplying a mixed gas of a fuel gas and fuel off-gas to the fuel cell stack, a stirring mixer for swirling the mixed gas provided in the mixed gas supply channel, and a guide rib provided on the inner wall of the fuel gas inlet communication hole of the stack manifold, on the side opposite to the side of the power generation portions of the fuel cells.

A fuel cell system that can prevent impurities from intensively collecting near inlets of fuel cells. The fuel cell system includes a fuel cell stack formed by stacking fuel cells, each fuel cell having a power generation portion, a stack manifold with a fuel gas inlet communication hole disposed at an end of the fuel cell stack in the stacking direction of the fuel cells, a mixed gas supply channel communicating with the fuel gas inlet communication hole for supplying a mixed gas of a fuel gas and fuel off-gas to the fuel cell stack, a stirring mixer for swirling the mixed gas provided in the mixed gas supply channel, and a guide rib provided on the inner wall of the fuel gas inlet communication hole of the stack manifold, on the side opposite to the side of the power generation portions of the fuel cells.

Cell frame 20 includes: frame body 21 having an opening 22, frame body 21 including through-hole 31 for passage of a fluid containing an active material, through-hole 31 penetrating from one surface of frame body 21 to the other surface thereof around opening 22, and groove-like slit 35 formed in one surface or the other surface and connecting through-hole 31 and opening 22; and rotor 40 made of an insulating material, rotor 40 received in slit 35 and forced to rotate by the flow of the fluid through slit 35 between through-hole 31 and opening 22.

A planar SOFC cell unit is formed from a plurality of planar elements (1100, 1200, 1300) stacked one above another. The cell unit encloses a cell chamber (1400) that includes a solid oxide fuel cell (2000) configured for electro-chemical generation, compliantly supported within the cell chamber. The plurality planar elements each comprise a thermally conductive material having a co-efficient of thermal conductivity that is a least 100 W/mK such as aluminum or copper. The planar elements are thermally conductively coupled to each other to provide a continuous thermally conductive pathway that extends from perimeter edges of the cell chamber to perimeter edges of the plurality of planar elements. An SOFC stack comprises a plurality of the planar SOFC cell units stacked one above another.

This disclosure related to polymer electrolyte member fuel cells and components thereof, including fuel cell endplates.