Patent · US Expired

Method and apparatus for charging rechargeable batteries

US6489750B2 · kind B2 · utility

8Cited by

4References

31Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Uwe Hebding · Hersbruck, DE
Georg Koch · Unterschleißheim, DE

Key dates

Filing date	Jul 11, 2001
Grant date	Dec 3, 2002
Priority date	—
Expiry date	Jul 11, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH02J7/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method and apparatus for charging a rechargeable battery with a current from a controllable current source. In order to adjust the rated current of the controllable current source, at least one operating parameter of the rechargeable battery, such as the rechargeable battery voltage which is produced as a consequence of a charging process, is detected. A pulsed control signal with a duty ratio which corresponds to the desired rated current is produced as a function of the operating parameter. The duty ratio of the pulsed control signal is evaluated, and the rated current of the current source is adjusted as a function of the duty ratio of the pulsed control signal.

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