Fuel cell stack structure

摘要

A fuel cell stack structure includes, for example, a plurality of unit cells each having an aperture formed therethrough. A first fuel cell stack is formed by stacking the plurality of unit cells in a stacking direction and has an internal manifold opening defined by the apertures. A fluid passage within the cell for flowing a fluid that flows within the internal manifold is configured and arranged to flow the fluid in a direction generally perpendicular to the stacking direction of the unit cell. The structure also includes an external manifold having an external passage for supplying the fluid to the internal manifold, wherein an external manifold surface facing a flow direction of the fluid creates a vortex in fluid flowing within the external passage proximal to the internal manifold.

主权项

1. A fuel cell stack structure, comprising:
a plurality of unit cells, each having an aperture formed therethrough; a first fuel cell stack formed by stacking the plurality of unit cells in a stacking direction, the first fuel cell stack having an internal manifold opening defined by the apertures of the plurality of unit cells, the internal manifold opening in communication with an internal manifold; an in-cell fluid passage in fluid communication with the internal manifold, the in-cell fluid passage configured and arranged to flow fluid in a direction generally perpendicular to the stacking direction of the unit cell; an external manifold having an external passage for supplying the fluid to the internal manifold, the external passage having a connection portion to connect the external passage to the internal manifold; and a convex surface protruding from an interior surface of the connecting portion, wherein the convex surface is configured to create a vortex in the fluid proximal to the internal manifold.