Patent · US Expired

Process for operating a PEM fuel cell installation

US6068942A · kind A · utility

17Cited by

4References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Karl Strasser · Erlangen, DE
Willi Bette · Erlangen, DE
Regina Hornung · Erlangen, DE

Key dates

Filing date	Dec 10, 1998
Grant date	May 30, 2000
Priority date	—
Expiry date	Dec 10, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A process for operating a PEM fuel cell installation includes providing at least one PEM fuel cell module having an inlet valve for hydrogen H.sub.2 and an inlet valve for oxygen O.sub.2. In order to switch off the PEM fuel cell module, the oxygen O.sub.2 inlet valve is closed in a first step, and the hydrogen H.sub.2 inlet valve is closed in a second step when a predetermined oxygen O.sub.2 partial pressure at a cathode part of the PEM fuel cell module is reached. Reliable operation of the PEM fuel cell installation is guaranteed by this measure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.