Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Grouping of fuel cells into stack or module
Reexamination Certificate
2011-04-19
2011-04-19
Yuan, Dah-Wei D (Department: 1727)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Grouping of fuel cells into stack or module
C429S428000, C429S517000
Reexamination Certificate
active
07927752
ABSTRACT:
An electrical shorting device for a fuel cell is provided, wherein the shorting device includes an electrically conductive body and an actuator coupled to the conductive body and adapted to selectively position the body between an electrically conductive and a non-electrically conductive position to selectively provide electrical communication between an anode plate and a cathode plate of the fuel cell. The shorting device facilitates electrical shorting of individual cells during the startup and shutdown of the fuel cell to eliminate the electrical potential across a proton exchange membrane that causes a degradation of a catalyst layer disposed on an a surface of an electrode of the fuel cells.
REFERENCES:
patent: 6913845 (2005-07-01), Bekkedahl et al.
patent: 2004/0209150 (2004-10-01), Rock et al.
patent: 2004/0224192 (2004-11-01), Pearson
patent: 2005/0064254 (2005-03-01), Bourgeois
patent: 2006/0147769 (2006-07-01), Murphy et al.
Marsiglio Carl M.
Miller Daniel P.
Rock Jeffrey A.
Best Zachary
Fraser Clemens Martin & Miller LLC
GM Global Technology Operations LLC
Miller J. Douglas
Yuan Dah-Wei D
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