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:
Sep. 21, 2004
Filed:
Nov. 20, 2001
Applicant:
Inventor:
Ilona Busenbender, Rheinbreitbach, DE;
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/16 ;
U.S. Cl.
CPC ...
H01M 2/16 ;
Abstract
A fuel cell system with flow passages and/or flow chambers which conduct moist gases in operation is characterized in that at least a part of the flow passages and/or flow chambers is provided with a coating which takes up water in distributed form at low temperatures and releases the water again at least in part at higher temperatures. This coating makes it possible to operate the fuel cell system at pronounced temperatures below zero, such as, for example, −40° C., and to ensure an adequate humidification of the operating gases, which protects the membranes from damage and favors a faster starting up of the fuel cell system.