Patent · US Active

Active isolation system for fuel cell

US7906242B2 · kind B2 · utility

2Cited by

1References

15Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventor

Stephen Raiser · Egelsbach, DE

Key dates

Filing date	Nov 23, 2005
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Jan 13, 2030

Classification

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

Abstract

A fuel cell system includes a fuel cell having conductive coolant flowing there through and a high voltage direct current (HVDC) bus interconnected with the fuel cell. An active isolation circuit includes coolant fault current sensors that detect a fault current (also called residual current) in the coolant and generates a fault signal when the fault current is detected. A switching circuit compensates and redirects the fault current based on the fault signal, providing active fault current limitation thereby.

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