Patent · US Active

Control strategy to prevent humidity cycling in a fuel cell

US7829228B2 · kind B2 · utility

2Cited by

0References

19Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Josef Kallo · Stuttgart, DE
Kilian Simbeck · Berlin, DE
Peter Kilian · Heidelberg, DE
Oliver Maier · Worms, DE
Manish Sinha · Pittsford, US
Steven D. Burch · Honeoye Falls, US
John P. Salvador · Penfield, US

Key dates

Filing date	Aug 24, 2006
Grant date	Nov 9, 2010
Priority date	—
Expiry date	Aug 17, 2029

Classification

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

Abstract

A system and method for reducing RH cycling of the membranes in a fuel cell stack. A control algorithm damps a power request signal using a first order filter during low power transients so that the fuel cell stack continues generating power at a higher rate than is requested. The excess power generated by the stack is used to recharge a battery in the fuel cell system. The damped power signal is weighted so that more fuel cell stack power is provided for a low battery state of charge unless stack power is provided for a high battery state of charge.

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