Fuel cell separator and power generation cell
AssigneeHonda Motor Co., Ltd.
InventorSuguru Omori
Life of this patent
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Abstract
A second separator (fuel cell separator) of a power generation cell is provided with a second separator body. Second flow field grooves and second flow field protrusions are alternately arranged on the surface of the second separator body. The second flow field protrusions includes first curved convex portions and second curved convex portions alternately arranged in the first direction. The first curved convex portion is formed with a first communication groove communicating with mutually adjacent second flow field grooves, and the second curved convex portion is formed with a second communication groove communicating with mutually adjacent second flow field grooves.
Claims10
A fuel cell separator comprising a plate-shaped separator body stacked on a membrane electrode assembly in which electrodes are arranged on both sides of an electrolyte membrane,
- wherein
- a surface of the separator body facing the electrodes is provided with a concave flow field groove that allows a reactant gas to flow along the electrodes in a first direction from one end to another end of the separator body and a convex flow field protrusion, the concave flow field groove and the convex flow field protrusion being alternately arranged in a second direction orthogonal to the first direction,
- the flow field groove and the flow field protrusion extend in a wave shape in the first direction,
- the flow field protrusion is formed by a first curved convex portion protruding in the second direction and a second curved convex portion protruding in a second protruding direction opposite to a first protruding direction of the first curved convex portion, the first curved convex portion and the second curved convex portion being arranged alternately in the first direction,
- the first curved convex portion is formed with a first communication groove that communicates with the flow field grooves adjacent to each other, and
- the second curved convex portion is formed with a second communication groove that communicates with the flow field grooves adjacent to each other.
A power generation cell comprising
- a membrane electrode assembly including an electrolyte membrane and a pair of electrodes arranged on both sides of the electrolyte membrane, and
- a pair of separators arranged on both sides of the membrane electrode assembly,
- wherein one of the pair of separators is a fuel cell separator comprising
- a plate-shaped separator body stacked on a membrane electrode assembly in which electrodes are arranged on both sides of an electrolyte membrane,
- wherein
- a surface of the separator body facing the electrodes is provided with a concave flow field groove that allows a reactant gas to flow along the electrodes in a first direction from one end to another end of the separator body and a convex flow field protrusion, the concave flow field groove and the convex flow field protrusion being alternately arranged in a second direction orthogonal to the first direction,
- the flow field groove and the flow field protrusion extend in a wave shape in the first direction,
- the flow field protrusion is formed by a first curved convex portion protruding in the second direction and a second curved convex portion protruding in a second protruding direction opposite to a first protruding direction of the first curved convex portion, the first curved convex portion and the second curved convex portion being arranged alternately in the first direction,
- the first curved convex portion is formed with a first communication groove that communicates with the flow field grooves adjacent to each other, and
- the second curved convex portion is formed with a second communication groove that communicates with the flow field grooves adjacent to each other.
Dependencies are inferred from the claim text.