Variable active area for fuel cell

Details Variable active area for fuel cell Variable active area for fuel cell

2004-05-11

2009-10-13

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000

Reexamination Certificate

active

07601451

ABSTRACT:
An electrochemical fuel cell stack assembly having a variable active area. The fuel cell stack uses a blocking member to selectively block the flow of reactants through channels of the flow fields of the anode and/or cathode flow paths. Blocking portions of the flow paths allows the fuel cell stack to maintain reactant flow velocities in a desired predetermined range. This enables the control and variation of the active area of the fuel cell, enhancing water management of the fuel cell stack.

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patent: 2003/0171721 (2003-09-01), Enomoto et al.
patent: 2003/0207165 (2003-11-01), Skala et al.
patent: 2004/0146770 (2004-07-01), Colton

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