Patent · US Active

Method for impedance-controlled fast charging, control unit for a charging system, stored energy source, and working device

US11607963B2 · kind B2 · utility

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16Claims

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Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Dave Andre · Munich, DE
Christoph Bauer · Graz, AT
Simon NUERNBERGER · Munich, DE
Jan Philipp SCHMIDT · Munich, DE

Key dates

Filing date	May 14, 2019
Grant date	Mar 21, 2023
Priority date	—
Expiry date	Oct 2, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T90/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is provided for impedance-controlled fast charging of a stored electrical energy source of a working device, in particular of a stored energy source in a vehicle. In the method: a variable characteristic of an impedance of the stored energy source is detected; a present charging current for charging the stored electrical energy source is set as a function of the variable characteristic of the impedance; the present charging current is temporarily reduced with a steep edge by temporarily connecting a resistive load to the stored energy source and feeding the load using the stored energy source; and a voltage response of the stored energy source to the steep edge is detected as the variable characteristic of the impedance of the stored energy source and is used as the basis for setting the present charging current.

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