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. 11, 2014
Filed:
Dec. 09, 2009
Applicants:
Sandra Seitz, Düsseldorf, DE;
Rudi Widt, Köln, DE;
Inventors:
Sandra Seitz, Düsseldorf, DE;
Rudi Widt, Köln, DE;
Assignee:
Inficon GmbH, Cologne, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/04 (2006.01); H01M 8/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
A stack () of fuel cells () is to be tested for tightness of the fuel cell membranes. For this purpose, a tracer gas is introduced into the fuel feed channel () of the stack (). The fuel discharge channel () is either open or it is closed. A carrier gas is fed to the feed air channel. () and led through the exhaust air channel () to a gas sensor () where a determination is made whether the carrier gas contains amounts of tracer gas. A defective fuel cell () can be located by introducing a lance comprising a sniffing probe into the corresponding channel () and determining the position of the probe.