Patent · US Active

Cathode humidification of a PEM fuel cell through exhaust gas recirculation into a positive displacement compressor

US7781084B2 · kind B2 · utility

1Cited by

1References

20Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Thomas Hild · Frankfurt am Main, DE
Thomas Herbig · Darmstadt, DE
Bernhard Wnendt · Adelsheim, DE

Key dates

Filing date	May 18, 2004
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Nov 12, 2028

Classification

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

Abstract

A fuel cell stack receiving oxidant into a compressor progressively pressurizing the oxidant from an inlet pressure to a discharge pressure where a fluid connection exists between oxidant effluent from the fuel cell stack and the progressively pressurized oxidant within the compressor at an intermediate pressure between the compressor inlet pressure and the compressor discharge pressure. A pressure regulator is provided for managing pressure of the cell oxidant effluent recycle flow to the compressor, and measurements are taken of compressor power consumption and/or compressor discharge temperature, humidity, and/or pressure to further control the regulator.

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