Patent · US Expired

Device and method for equalising the charge of serially connected capacitors belonging to a double layer capacitor

US7312596B2 · kind B2 · utility

9Cited by

5References

18Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Stephan Bolz · Pfatter, DE
Martin Götzenberger · Ingolstadt, DE
Rainer Knorr · Regensburg, DE
Günter Lugert · Birkenfeld, DE

Key dates

Filing date	Jan 7, 2005
Grant date	Dec 25, 2007
Priority date	—
Expiry date	Jan 7, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH02J7/345
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A device and a method are provided for equalizing the charge of the capacitors belonging to a double layer capacitor. The device includes an individual transformer associated with each individual capacitor and a flyback transformer or a spool, from which the energy is transferred, via the individual transformers, to the individual transformer, by the respective low charge. Conclusions on the state of the double layer capacitor and the charge-equalizing switch are derived from the measured charging time and discharging time of the flyback transformer.

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