The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 2012
Filed:
May. 15, 2006
Benno Andreas-schott, Pittsford, NY (US);
Roger M. Brisbane, Spencerport, NY (US);
Mahmoud H. Abd Elhamid, Grosse Pointe Woods, MI (US);
Benno Andreas-Schott, Pittsford, NY (US);
Roger M. Brisbane, Spencerport, NY (US);
Mahmoud H. Abd Elhamid, Grosse Pointe Woods, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A fuel cell stack that includes a non-permeable shim plate positioned between a composite unipolar plate and a terminal plate at both ends of the stack, where the shim plate is made of a non-corrosive material, such as stainless steel, titanium or sealed graphite. Because the shim plate is non-permeable, it prevents cooling fluid that diffuses through the unipolar plate from contacting the terminal plate, which would otherwise corrode the terminal plate. The shim plate can be coated with a conductive material, such as gold, platinum, ruthenium oxide or mixtures thereof, to reduce its contact resistance.