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:
Jul. 01, 2003
Filed:
May. 09, 2000
Applicant:
Inventors:
Mark C. Johnson, Phoenix, AZ (US);
David P. Wilkinson, North Vancouver, CA;
John Kenna, Vancouver, CA;
Olen R. Vanderleeden, Coquitlam, CA;
Joerg Zimmerman, Vancouver, CA;
Mehrzad Tabatabaian, Port Moody, CA;
Assignee:
Ballard Power Systems, Inc., Burnaby, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/02 ; H01M 8/02 ;
U.S. Cl.
CPC ...
H01M 2/02 ; H01M 8/02 ;
Abstract
Flow fields comprising a set of fluid distribution channels may be employed in fuel cells for purposes of distributing fluid reactants to an electrochemically active area of the fuel cell. Water management and reactant distribution may be improved by increasing pressure gradients between adjacent channels. Such pressure gradients may be increased by engineering the channels such that the resistance to reactant flow differs along the length of adjacent channels.