ELECTRONIC BATTERY VOLTAGE CONTROL SYSTEM FOR A STABILIZED POWER PACK WITH STAND-BY BATTERY, IN PARTICULAR THAT USED TO PROVIDE POWER SUPPLY TO COMPUTER EQUIPMENT

摘要

Electronic circuit for controlling the voltage of an accumulator in a stabilized network-accumulator power supply, in particular for computers, the power supply consisting of an initial network power supply, a voltage stabilizer and accumulator, characterized in that it has a two-diode circuit summing the output voltage of the initial power supply (Z) and accumulator (A), consisting of one summing diode (D1) connecting the output of the initial power supply (Z) to the input of a voltage stabilizer (S'), and of a second summing diode (D2) also connecting the positive pole of the accumulator (A) to the input of a voltage stabilizer (S) via a p-n-p transistor (T1), whose emitter-collector junction is connected respectively on one side to the positive pole of the accumulator (A) and on the other to the second summing diode (D2), while the base of the p-n-p transistor (T1) is controlled in turn by a circuit consisting of a resistor (R1), the collector-base junction of an n-p-n transistor (T2) with earthed emitter, and a second resistor (R2) which is also connected in series, via a Zener diode (Dz1), to the input of the voltage stabilizer (S), and that it has a circuit for charging and disconnecting the accumulator (A), consisting of a current source (I) and a disconnecting diode (D3), the current source (I) having its input connected to the output of the initial power supply (Z) and its output connected via the disconnecting diode (D3) to the positive pole of the accumulator (A).IMAGE