Schaltung für eine kleine elektrische Anwendung mit einem Akkumulator und Verfahren zum Messen des Ladestroms

Details

Veröffentlichungs-Nr.

EP2571137

Aktenzeichen

EP12184300

Anmeldetag

13. September 2012

Veröffentlichung

24. Juni 2020

Erteilung

24. Juni 2020

Rechtsraum

EP

IPC

H02J7/02H02J7/00

Abstract

The invention relates to a circuit for a battery-operated small electric appliance having a rechargeable battery (B), a control circuit (uC) for measuring the charging current of the rechargeable battery (B), and a DC-DC converter (DC/DC) which supplies the control circuit (uC) and possibly further loads from the battery. The circuit has further a current sensing resistor (R1), whose one end lies at a reference potential and whose other end is connected to the battery (B). The control circuit (uC) has a terminal which is at reference potential and a measurement input which is related to the reference potential. A method for measuring the charging current of the rechargeable battery includes that said control circuit (uC) measures the charging current only when the at least one further load is switched off or the control circuit (uC) provides at least one correction value to the measured charging current when the at least one further load is not is switched off during the current measurement.

Anmelder

Firma

Braun GmbH

Land

🇩🇪 Deutschland

Fachgebiete