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:
Mar. 02, 2004
Filed:
May. 29, 2001
Applicant:
Inventors:
Gene Kim, Plantation, FL (US);
Ronald J. Kelley, Coral Springs, FL (US);
Steven D. Pratt, Plantation, FL (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 8/04 ; H01M 8/12 ; H01M 8/10 ; H01M 2/14 ;
U.S. Cl.
CPC ...
H01M 8/04 ; H01M 8/12 ; H01M 8/10 ; H01M 2/14 ;
Abstract
A thermo-responsive polymer is incorporated into a fuel cell ( ) in order to maintain optimum hydration of the polymer electrolyte membrane. The thermo-responsive polymer ( ) is situated proximate to the membrane electrode assembly ( ) such that fuel or oxidant gas passes ( ) through the thermo-responsive polymer to the membrane electrode assembly. The thermo-responsive polymer swells or shrinks in response to changes in the operating temperature of the membrane electrode assembly, altering the flow rate of the fuel or oxidant gas passing through the thermo-responsive polymer.