Pre-nesting of the active area on plates to reduce thickness...

Details Pre-nesting of the active area on plates to reduce thickness... Pre-nesting of the active area on plates to reduce thickness...

2008-01-30

2010-11-02

Banks, Derris H (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S623100, C029S830000, C029S831000, C029S842000, C903S908000, C429S006000, C429S010000

Reexamination Certificate

active

07823277

ABSTRACT:
A method for preparing a bipolar plate assembly for a fuel cell stack is provided. The method first includes the steps of providing a first unipolar plate having a first active area with a plurality of channels formed on a first inner surface thereof, and a second unipolar plate having a second active area with a plurality of lands formed on a second inner surface thereof. The first unipolar plate and the second unipolar plate are aligned to dispose the first active area adjacent the second active area. A first pressure is then applied to the first and second active areas to pre-nest the first active area and the second active area. The perimeters of the first and second unipolar plates are then joined. A clamping fixture and associated method for assembling the bipolar plate assembly is also provided.

REFERENCES:
patent: 5268241 (1993-12-01), Meacham
patent: 6974648 (2005-12-01), Goebel
patent: 2004/0151975 (2004-08-01), Allen
patent: 2005/0100771 (2005-05-01), Vyas et al.
patent: 2006/0046130 (2006-03-01), Lai
patent: 2006/0127706 (2006-06-01), Goebel et al.

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