Roll bonding of bipolar plates

Details Roll bonding of bipolar plates Roll bonding of bipolar plates

2004-08-06

2008-11-18

Stoner, Kiley (Department: 1793)

Metal fusion bonding

Process

With shaping

C228S245000, C228S235200

Reexamination Certificate

active

07451907

ABSTRACT:
A current collector plate, also called a bipolar plate, for a fuel cell includes two facing metal sheets with fluid channels for the fuel (often hydrogen) on the non-facing side of one sheet and fluid channels for air on the non-facing side of the other sheet. Such a plate is made by applying a patterned coating of particles of a soft and reactive metal to at least one of the sheets and rolling them together so that the soft metal particles deform and interact with the facing sheets to selectively join them at the patterned areas. Pressurized fluid is introduced between the sheets to expand non-bonded portions and define the fluid channels.

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U.S. Appl. No. 10/738,402, filed Dec. 17, 2003 entitled “Bipolar plate fabrication by roll bonding”, Xiaohong Gayden, et al.
U.S. Appl. No. 10/738,481, filed Dec. 17, 2003 entitled “Bipolar Plate Fabrication”, Xiaohong Gayden, et al.

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