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Title: Battery charging circuit

Abstract

A battery charging circuit having an electromagnetic transformer with primary and secondary coils, a rectifier connected between the secondary coil and the battery, a first transistor connected in series with the primary coil and a resistor to form a circuit in parallel with a power source, the base of the first transistor being connected to the secondary coil, and a second transistor electrically connected to the base of the first transistor. The first transistor has a high switching frequency, and the battery is charged with a constant reverse current during its blocking phase, regardless of the power source voltage. The first transistor is protected from reverse kick-back voltage pulses induced during its blocking phase by the provision of a diode and zener diode connected in series across the primary coil and a capacitor interposed between the secondary coil and the base of the first transistor.

Inventors:
; ;
Publication Date:
OSTI Identifier:
6192741
Patent Number(s):
US 4376263
Assignee:
Braun Ag (Germany, Federal Republic Of)
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 6 Nov 1980, Germany, Federal Republic of (F.R. Germany); Other Information: PAT-APPL-228867
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; BATTERY CHARGERS; DESIGN; NICKEL-CADMIUM BATTERIES; ELECTRONIC CIRCUITS; JUNCTION DIODES; TRANSISTORS; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; METAL-METAL OXIDE BATTERIES; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; 250902* - Energy Storage- Batteries- Performance & Testing

Citation Formats

Lang, G, Pittroff, K, and Schwarz, G. Battery charging circuit. United States: N. p., 1983. Web.
Lang, G, Pittroff, K, & Schwarz, G. Battery charging circuit. United States.
Lang, G, Pittroff, K, and Schwarz, G. Tue . "Battery charging circuit". United States.
@article{osti_6192741,
title = {Battery charging circuit},
author = {Lang, G and Pittroff, K and Schwarz, G},
abstractNote = {A battery charging circuit having an electromagnetic transformer with primary and secondary coils, a rectifier connected between the secondary coil and the battery, a first transistor connected in series with the primary coil and a resistor to form a circuit in parallel with a power source, the base of the first transistor being connected to the secondary coil, and a second transistor electrically connected to the base of the first transistor. The first transistor has a high switching frequency, and the battery is charged with a constant reverse current during its blocking phase, regardless of the power source voltage. The first transistor is protected from reverse kick-back voltage pulses induced during its blocking phase by the provision of a diode and zener diode connected in series across the primary coil and a capacitor interposed between the secondary coil and the base of the first transistor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {3}
}