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:
Jun. 01, 2004
Filed:
Jul. 23, 2001
Applicant:
Inventors:
Andreas Christen, Leimbach, DE;
Jens Thomas Mueller, Munich, DE;
Assignee:
DaimlerChrysler AG, Stuttgart, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 8/04 ;
U.S. Cl.
CPC ...
H01M 8/04 ;
Abstract
A fuel cell system has an anode space and a cathode space with a separating proton-conducting membrane. A cathode feed line is used to feed oxygen-containing gas to the cathode space, and an anode line is used to feed and discharge an operating medium into the anode space. A representative temperature is determined for the system, and metered amounts of operating medium are passed to the cathode space as a function of this temperature. Increasing in the operating medium concentration in the cathode space in this manner causes a reduction in the freezing point and, when the system is started, an exothermic catalytic reaction.