Patent · US Active

Fuel cell power request control strategy

US8642222B2 · kind B2 · utility

3Cited by

1References

6Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Jochen Schaffnit · Darmstadt, DE
Jochen Lenz · Hattersheim, DE
Peter Willimowski · Darmstadt, DE
Andreas Voigt · Regensburg, DE

Key dates

Filing date	Jan 19, 2007
Grant date	Feb 4, 2014
Priority date	—
Expiry date	Aug 17, 2030

Classification

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

Abstract

A power request controller that prevents a power request signal to a fuel cell stack controller from providing more compressor air and hydrogen gas than is necessary to meet the current power demands of the vehicle. The stack controller generates a signal of the available current from the fuel cell stack. This signal and the measured current actually being drawn from the stack are received by a proportional-integral (P-I) controller in the power request controller. If the available stack current is significantly greater than the stack current being used, the P-I controller will provide an output signal that reduces the power request signal to the stack controller so that the current produced by the stack and the current being drawn from the stack are substantially the same. A transient detector turns off the P-I controller so that it does not reduce the power request signal during an up-power transient.

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