| 摘要 |
A fuel cell stack (5, fig 1) consists of multiple fuel cells (6, fig 1), each comprising a frame 30 to define an electrolyte chamber 20 for a liquid electrolyte. Each of the frames 30 in the stack define apertures 34 that are aligned in the fuel cell stack to define fluid flow headers, there being at least one fluid flow header for the liquid electrolyte, and each cell defines a linking passage 36 between the electrolyte chamber 20 and the fluid flow header for the liquid electrolyte. The cell stack also comprises a flow-modifying insert 50 within the aperture 34 providing the fluid flow header for the liquid electrolyte, the insert 50 in combination with the header defining a flow channel whose cross-sectional area varies along the length of the insert 50 (figs 3 and 4), decreasing in the flow direction along the flow channel. The insert 50 improves flow uniformity within the stack. Preferably, the insert 50 is in the form of an open channel, with a cross-section which tapers linearly along its length. |
