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. 02, 2005
Filed:
Apr. 24, 2002
James H. Lee, Rochester, NY (US);
James H. Lee, Rochester, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A bipolar plate assembly is provided for use in a fuel cell stack to supply reactants to the anode and cathode sides of fuel cells within the stack. The bipolar plate assembly includes first and second sub-plates, each including a first face surface having a coolant flow field formed therein and a second face surface having a reactant flow field formed therein. The coolant fields of the first and second sub-plates include regions of varying flow volume, having respective flow resistance therebetween. The regions of varying flow volume enable variable cooling across the fuel cell stack, thereby enabling a constant temperature to be achieved across the fuel cell stack.