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:
Aug. 24, 2010
Filed:
Apr. 22, 2005
Applicant:
Tomas Dehne, Montabaur, DE;
Inventor:
Tomas Dehne, Montabaur, DE;
Assignee:
GM Global Technology Operations, Inc., Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 8/02 (2006.01); H01M 2/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fuel cell stack utilizes flow shifting of the anode reactant within the individual fuel cells of the fuel cell stack. The anode side of the fuel cells are separated into two or more flow fields. Anode reactant is supplied in varying quantities to the two flow fields so that anode reactant flowing through one of the flow fields is allowed to back flow into the other flow field and vice versa. The back flowing of anode reactant between the flow fields distributes nitrogen more evenly between the multiple flow fields in each of the fuel cells.