Patent · US Active

Floating base load hybrid strategy for a hybrid fuel cell vehicle to increase the durability of the fuel cell system

US7597976B2 · kind B2 · utility

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9Claims

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Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Peter Kilian · Heidelberg, DE
Volker Formanski · Wiesbaden, DE
Jochen Schaffnit · Darmstadt, DE

Key dates

Filing date	Dec 20, 2005
Grant date	Oct 6, 2009
Priority date	—
Expiry date	Feb 27, 2027

Classification

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

Abstract

A fuel cell system employing a floating base load hybrid strategy for reducing fast voltage transients of a FCPM. A power request signal is applied to an average power calculation processor that calculates the average power requested over a predetermined previous period of time. A weighting function processor provides a weighting function based on the state of charge of an EESS. The power available from the FCPM and the EESS is applied to a power comparison processor. The available power is compared to the power request to provide a difference value between what is currently being provided and what is desired. The difference value is compared to power limit values of the EESS. The output value of this comparison is added to a filtered value to generate a signal for the change in the output power of the fuel cell stack based on the power request.

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