SU1597972A1 - Device for automatic monitoring electrolyticylly coupled storage batteries - Google Patents

Abstract

The invention relates to electrical engineering and can be used for automatic element-by-element control of chemical current sources. The purpose of the invention is to improve the accuracy of control. A switchboard of two analog H channel multiplexers, controlled cyclically by a distributor, alternately connects, through a differential amplifier, the elements of the battery to one of the inputs of the comparison circuit. The voltage supplied to the other input of the comparison circuit from the reference voltage source is automatically corrected to take into account changes in the transmission coefficient of the measuring path (switch-differential amplifier - comparison circuit) at the beginning of each polling cycle. 1 il.

Description

The invention relates to electrical engineering and can be used for automatic element-by-element control of chemical current sources.

The purpose of the invention is to improve the accuracy of control.

The drawing shows a diagram of the proposed device.

The accumulator battery 1, consisting of two galvanically connected batteries 1i ... In, is connected to the analog inputs of the n-channel multiplexers 2 and 3 of switch 4, the control inputs of which are connected to the inputs of the decoder 5, to the outputs of the distributor 6, and the analog outputs are connected to the inputs of the differential amplifier 7. The output of the comparison circuit 8, one of the inputs of the terminal is connected to the output of the differential amplifier (RC) 7, connected to the input of the control key 9 and one of the inputs of the element ILI 10, as well as with communication channels 11. Another input of the comparison circuit 8 is connected to the output of a digital-to-analog converter (DAC) 12, the digital inputs of which are connected to the outputs of the pulse counter 13, and the inputs of the latter are connected to the outputs of the clock generator 14, the single vibrator 15 and the element OR NOT 10. Another input of the element OR -NON 10 is connected to the control input of the control key 9, the output of which is connected to the input of the distributor 6, as well as through the inverter 16c, the output of the decoder 5 and the input of the one-oscillator 15. The source 17 of the reference voltage is connected to the first inputs of the multiplexers 2 and 3.

The decoder 5 is a binary matching scheme. A microcircuit can be used as a control key 9, and also a microcircuit as a DAC 12. The pulse frequency of the master oscillator must be high enough to ensure filling

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pulse counter 13 during the storage time unchanged at the output of the distributor 6 of the code, according to which the source 17 of the reference voltage is connected to the inputs of the differential amplifier 7.

The device works as follows.

When a digital code distributor appears at the output, according to which the first keys of multiplexers 2 and 3 connect the source 17 of the reference voltage to the same input of the comparison circuit 8, the logical decoder 5 appears at the output of the decoder 5, the one-shot 15 generates a single pulse reset information of the counter 13 pulses to zero, at the same time, the counter 13 pulses receives permission through the inverter 16 and the element OR-hHE 10 to the account of the pulses from the master oscillator 14.

Logical 1 from the output of the decoder 5 through the inverter 16 provides the locking of the controlled key 9. The changing digital code of the pulse counter 13 is converted to a linearly increasing voltage using a DAC 12, which is fed to another input of the comparison circuit 8.

At the moment when the comparison circuit 8 is triggered, its high level output signal stops the pulse counter 13 through the element OR NEY 10, and a voltage equal to the voltage at the first input is set to another input of the comparison circuit, i.e. the voltage of the reference voltage source, taking into account the transmission coefficient of the measuring path (the switch is a differential 1/1 amplifier comparison circuit).

The locked control key 9 does not pass the high level output signal of the comparison circuit 8 to the distributor 6, therefore its operation does not change. Over time, at the output of the distributor, the digital code changes to 1, this closes the first and opens the second keys of multiplexers 2 and 3, connecting the battery 1 via remote control 7 to the first input of the comparison circuit at the output of which a low level signal appears. The changed digital code at the output of the distributor causes the appearance at the output of the decoder 5 logical 0, which through inverter 16 opens the controllable switch 9, and through inverter 16 and the element OR NOT 10 holds the counter 13 pulses in the Account mode no, despite the appearance low level signal at the output of the comparison circuit.

If the voltage of the battery 11 is within the allowable limit, which is determined by the voltage of the reference source 17, taking into account the voltage drop on the keys

multiplexers 2 and 3 and the gain of the remote control 7, the comparison circuit does not work and the command to check the next battery comes from the distributor output. When the voltage on any of the batteries beyond the permissible value, the command of the comparison circuit (the controllable key is locked only when checking the source 17 of the reference voltage) continues monitoring only

5 of this battery, and external devices via communication channels 11 receive information about the presence of a faulty battery and its number.

Improving the accuracy of control is ensured by the fact that in each polling cycle the voltage transfer ratio from the input of multiplexers to the output of the comparison circuit is taken into account, thus eliminating the effect of parameter instability

5 multiplexers, a differential amplifier and a comparison circuit for control accuracy.

Claims (1)

Apparatus of the Invention A device for automatic control of galvanically coupled batteries containing terminals for connecting controlled batteries, a differential amplifier, a distributor, a comparison circuit, a reference voltage source. 5 and a switch-controlled switch made on two analog channel multiplexers, the analog inputs of the first of which are connected to positive, the second to negative 0 terminals for connecting batteries, and their outputs are connected to the inputs of the differential amplifier. the output of which is connected to the first input of the comparison circuit, characterized in that, in order to 5 increase the accuracy of control, it additionally introduces a digital-to-analog converter (DAC), a pulse counter, a clock generator, a one-shot, an OR-NOT logic element, an inverter, a control key and a decoder, and the output of the DAC. connected to the second input of the comparison circuit, the digital inputs of the D / A converter are connected to the outputs of the pulse counter, the clock input of which is connected to the output of the clock generator, the installation input to O is connected to the output of the one-oscillator, and the input to enable the counting output to the logic element OR NOT, one of the inputs of the element OR are NOT connected to the output of the comparison circuit and the input of the controllable key, the other is connected to the control the input of the controlled key and through the inverter with the output of the decoder and the input of the one-vibrator, the inputs of the decoder are connected to the outputs of the distributor, the input which is connected to the output of the controlled key, while the source of the reference voltage is connected to the first analog inputs of the switch.