CS209270B1 - Connexion for automatic accumulator battery charging - Google Patents

Description

(54) Automatic battery charging connection

The invention relates to a circuit for automatic charging; connecting the battery.

Currently, there are a number of battery chargers, ‘mostly very complex to perform these functions. Since many electronic devices use rechargeable batteries to operate when the device is working on the mains, it is very advantageous if the charger is plugged in automatically, even if the device is on the mains. At the same time, recharging is required when the battery voltage reaches a defined value. It is necessary to observe the condition that the device is simple and therefore reliable due to the relatively high cost of the accumulator batteries.

The automatic battery charging circuit according to the invention is among the simplest. The essence of the circuit is that it consists of a semiconductor element whose control electrode is connected via a protective diode to the potentiometer slider, wherein the variable <reference element consisting of a parallel combination of the Zener diode and the potendometer is connected in series; with fixed reference element.

The advantage of wiring for automatic battery charging is that it does not place any special demands on the power supply. This can be either direct, alternating or pulsating, e.g. after two-way rectification of alternating sinusoidal voltage. Another advantage is the easy choice of switching charging 2092701 according to the type of batteries, ie 6V, 12V, 24V, rechargeable batteries just change - switching the reference Zener diode. Furthermore, by suitable dimensioning of the semiconductor element it is possible to charge the accumulators with the nominal capacity of the order of units up to hundreds of ampere hours.

An exemplary circuit according to the invention is schematically shown in the attached drawing.

The circuit is based on a contactless semiconductor switching element 1, whose input electrode 12 is connected to a voltage source 11 and the output electrode 13 is connected via a protective resistor 9 to a rechargeable accumulator battery 10, its control electrode 2 being connected via a protective diode 3 to a slider 5 6. The parallel combination of the potentiometer 6, the Zener diode 7 and the series-connected reference element 8 allows the individual voltage to be set individually for each battery and thus prevents the battery from overcharging. The protective resistor 9 limits the charged current of the rechargeable battery 10, the resistor 4 sets the operating point of the reference element 8 and the protective diode 3 protects the semiconductor element 1 from damage.

Wiring for automatic recharging of rechargeable batteries can be applied in the design and manufacture of rechargeable batteries.

Claims (1)

209270 SUBJECT Automatic battery charging circuit consisting of a semiconductor switching element whose control electrode is connected to a protective diode in series with a fixed reference element and whose input electrode is connected to a voltage source, while the output electrode is connected via a protective resistor to a rechargeable battery INVENTION characterized in that the control electrode (2) of the semiconductor switching element (1) is connected via a protective diode (3) to the slider (5) of the potentiometer (6), the variable reference element consisting of a parallel combination of Zener diode (7) and potentiometer (6) is connected in series with a fixed reference element (8).