Patent · US Expired

Method of monitoring a fuel cell unit

US7124040B2 · kind B2 · utility

15Cited by

10References

19Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Thorsten Engelhardt · Stuttgart, DE
Richard Fosmoe · Echterdingen, DE
Wolfgang Weiss · Ottobrunn, DE

Key dates

Filing date	Sep 13, 2004
Grant date	Oct 17, 2006
Priority date	—
Expiry date	Sep 18, 2024

Classification

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

Abstract

In a method of monitoring a fuel cell unit, at least one pair of measured values, including a measured current value and a measured voltage value (Iactual, Uactual) are determined at the outputs of the fuel cell unit. The measured voltage value (Uactual) is compared with a limit value (PG), which is a function of the measured current value (Iactual) by way of a limit characteristic polarization curve. It is concluded that the condition of the fuel cell unit is faulty when the measured voltage value (Uactual) or a function of the measured voltage value is smaller than or equal to a predefined threshold value.

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