Method of making bipolar plate with coolant channels

Details Method of making bipolar plate with coolant channels Method of making bipolar plate with coolant channels

2007-02-13

2010-12-21

Walker, Keith (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Means for distributing, storing, or preventing fluid movement

C429S456000, C429S535000

Reexamination Certificate

active

07855031

ABSTRACT:
Bipolar plates in a fuel cell stack tend to experience lower operating temperatures near and at the ends of the stack, and these plates require lower coolant flow. But common stamping tooling can be used to make all of the plates for the stack when suitable coolant flow restrictors are stamped into each plate for lowest coolant flow. The flow restrictors are then trimmed (or their formation avoided) from those plates designated for higher coolant flow.

REFERENCES:
patent: 6218038 (2001-04-01), Oko et al.
patent: 7601451 (2009-10-01), Tighe
patent: 2004/0209150 (2004-10-01), Rock

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