Patent · US Active

Method for revising a polarization curve that defines the current/voltage relationship of a fuel cell stack

US7879502B2 · kind B2 · utility

4Cited by

0References

20Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Sebastian Lienkamp · Milford, US
Bernd Krause · Liederbach, DE

Key dates

Filing date	Dec 14, 2009
Grant date	Feb 1, 2011
Priority date	—
Expiry date	Dec 14, 2029

Classification

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

Abstract

A method for revising a reference polarization curve of a fuel cell stack that identifies the relationship between the voltage and the current of the stack over time. When the stack is operating at a low load where kinetic voltage losses of the stack dominate, a first adaptation value is revised as the difference between the actual stack voltage and the stack voltage of the reference polarization curve. When the stack is operating at higher loads where ohmic voltage losses of the stack dominate, a second adaptation value is revised as the difference between the actual stack voltage and the stack voltage of the reference polarization curve.

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