Patent ID: 7951507
Filing Date: 2011-05-31
Classification: H01M,Y02E

Abstract:
1. A stamped bipolar plate of a fuel cell stack, comprising: a first stamped plate half having opposed first and second faces, a first reactant flow field formed in the first face of the first stamped plate, a portion of which defines a first reactant header region, and a partial coolant flow field formed in the second face of the first stamped plate; and a second stamped plate half having opposed first and second faces, a partial first coolant flow field formed in the second face of the second stamped plate, a portion of which defines a first set of coolant feed channels that extend at least partially across said first reactant header region; wherein said first and second stamped plate halves are attached together having only the second face of each facing one another and said first set of coolant feed channels are a plurality of longitudinally extending straight channels that are parallel to one another and form an entirety of said first coolant flow field; said first stamped plate half further includes a second coolant flow field formed therein and facing said first coolant flow field, a portion of which defines a second set of coolant feed channels; and a shortest coolant channel of the first set of coolant feed channels communicates with a longest coolant feed channel of the second set of coolant feed channels and vice-versa, whereby a pressure drop of the fluid flow across the bipolar plate is equal for all coolant feed channels.