Patent · US Active

System for controlling the power output of a fuel cell stack and battery

US7847513B2 · kind B2 · utility

3Cited by

1References

8Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Oliver Maier · Worms, DE
Peter Kilian · Heidelberg, DE
Jochen Schaffnit · Darmstadt, DE

Key dates

Filing date	Jun 26, 2009
Grant date	Dec 7, 2010
Priority date	—
Expiry date	Jun 26, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T90/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A system for controlling the power output of a fuel cell stack and a battery in a hybrid fuel cell system. The system includes a power damping filter that receives a power request signal, and damps the request to reduce large changes in the power request. A battery state of charge controller receives the difference between a battery state of charge set-point and the actual battery state of charge, and provides a battery power signal that attempts to maintain the battery state of charge at the set-point. The damped power signal and the battery power signal are added to generate a system power demand signal that satisfies the driver power request using the battery power and fuel cell stack power, and uses the fuel cell stack power to charge the battery during low power transients or if the battery state of charge is below the set-point.

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