Fuel cell separator and fuel cell

Details Fuel cell separator and fuel cell Fuel cell separator and fuel cell

H - Electricity

01

M

H01M 2/14 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2638537

A separator (5, 6) for a fuel cell (1) comprises a gas passage (16-20, 36-40) facing an electrode (3, 4). The gas passage (16-20, 36-40) comprises a rapid expansion which enlarges a width of the gas passage (16-20, 36-40) in a step-like fashion from an upstream side to a downstream side with respect to a flow of gas. The gas passage (16-20, 36-40) upstream of the rapid expansion is thereby made narrow which prevents dry-out of the fuel cell (1) while the rapid expansion enhances a moisture bead sweeping force of the gas flow which prevents flooding from occurring in the gas passage (16-20, 36-40) downstream of the rapid expansion.

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