A detector for use for the charge regulator a sekundaerbatterie as well as a battery charging system

摘要

A detector, intended particularly for detecting end of charge of a secondary battery under constant current charge, includes a linear input stage producing an output voltage linearly related to the battery voltage. A relay contact is closed periodically by pulses from a clock to connect the output of the input stage to a capacitor and resistor in series. Any change in the output voltage between closure of the contact cause current to flow in the resistor and a comparator compares the voltage across this resistor with a reference voltage. When the battery is charged and the output voltage starts to fall, the negative voltage on the resistor cause the comparator to latch and provide an output signal.