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. 29, 2000
Filed:
Apr. 01, 1999
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429 13 ; 429 23 ;
Abstract
A process for operating a PEM fuel cell unit containing at least one PEM fuel cell block and a speed-controlled compressor connected upstream. To control changing an electrical current I of the PEM fuel cell block to a new reference value I.sub.SN, a speed n of the compressor is set in a first step to a maximum value n.sub.M and in a second step is reduced to a speed n.sub.SN corresponding to the new reference value I.sub.SN. By this expedient improved dynamics for brief and rapid load changes are achieved.