Fuel cell stack

Abstract

A unit cell (12) of a fuel cell stack (10) includes separators (30,32). Load receivers (64a,64b) provided in the separators (30,32) include projections (68), for example. The proximal ends of the projections (68) are depressed to form inner curves (70a,70b). In the structure, sufficient flexibility of the projection (68) is achieved. That is, when a force in a direction perpendicular to a stacking direction of fuel cell stack (10) is applied to the projection, the projection (68) is deformed in the direction perpendicular to the stacking direction.

Description

technical field [0001] The present invention relates to a fuel cell stack constituted by stacking a plurality of single cells. Background technique [0002] A fuel cell has a unit cell in which an electrolyte membrane-electrode structure is interposed between a set of separators by an anode electrode and a cathode electrode sandwiching an electrolyte (for example, a solid polymer electrolyte membrane, an oxide ion conductor). Usually, a fuel cell stack is formed by stacking a plurality of these unit cells. Generally, a fuel cell stack is provided with a fastening member that applies a fastening load from a unit cell at one end to a unit cell at the other end to prevent the unit cells from falling off. [0003] Shock loads are sometimes applied to such fuel cell stacks from the outside. As described above, since the fastening load is applied in the stacking direction of the single cells by the fastening member, movement of the single cells in the stacking direction is diffi...

AI Technical Summary

Problems solved by technology

As described above, since the fastening load is applied in the stacking direction of the single cells by the fastening member, the movement of the single cells in the stacking direction is difficult to occur.

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