Patent ID: 7781119

Claim:
A plate for a fuel cell, the plate comprising: at least two fluid inlets each connected to a separate one of at least two metering devices; a fluid outlet; and at least two flow fields substantially co-planar with one another, a first one of said flow fields communicating with a first one of said inlets and receiving a first fluid flow through said first inlet and a second one of said flow fields communicating with a second one of said inlets and receiving a second fluid flow through said second inlet, wherein said plate has opposite exterior surfaces, said at least two substantially co-planar flow fields are anode reactant flow fields and are located on a first of said exterior surfaces and a single cathode reactant flow field is disposed on a second of said exterior surfaces, wherein said outlet communicates with both of said first and second flow fields; and a controller configured to control said at least two metering devices to control flow through said at least two flow fields such that fluid flowing through one of said flow fields backflows into a different one of said flow fields via said outlet.