Patent · US Expired

Device and method for equalizing charges of series-connected energy stores

US7800346B2 · kind B2 · utility

11Cited by

7References

17Claims

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	Mar 24, 2005
Grant date	Sep 21, 2010
Priority date	—
Expiry date	May 12, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/70
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A device and method for equalizing the charges of series-connected individual cells of an energy storage device with a DC/DC converter, which draws energy from the energy storage device or from another energy source, charges an intermediate circuit capacitor whose voltage is inverted in a DC/AC converter, converts the alternating voltage via AC bus lines and coupling transformers by way of a rectifier into a pulsating direct current, and charges the cell having the lowest cell voltage with the pulsating direct current.

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