SU1104614A1 - Charging sytem - Google Patents

Abstract

1. CHARGE SYSTEM, containing a battery, for example, nickel-cadmium, a charge current regulator and a discharge current regulator connected to a battery through a switch, and a pulse driver, output connected to the counting input of a digital counter, whose power supply connected via a voltage regulator to the output terminals of the battery, characterized in that. In order to reduce charging time, increase efficiency and increase battery life, it is equipped with a functional converter that simulates the dependence of the residual capacity of a battery on its discharge voltage, an electronic key, an analog-digital converter and a control and management unit, and a functional The input converter is connected to the battery terminals via an electronic key, and the output is connected via an analog-to-digital converter. to the installation input of the digital counter, the control and monitoring unit of the inputs is connected to the output of the analog-digital converter and the information output of the digital counter, and the outputs to the control input of the electronic key, the starting input of the pulse generator and the first and second control inputs of the switch. About: RD

Description

2. The system according to claim 1, characterized by the fact that the functional converter, which simulates the dependence of the residual capacity of the battery on the magnitude of its discharge voltage, is made in the form of the first amplifier with a diode

in csmi feedback.

3. The system according to claim 1, is different from the fact that the control unit

and control is made in the form of a logic circuit consisting of two triggers, a delay element and a coincidence element, with the input of the first trigger connected to the starting input of the monitoring and control unit, to which the element input is also connected

delay, the output of the delay element is connected to the input that sets the first trigger in О, the forward output of which is connected to the first input of the switch and the electronic key, and its reverse output is connected to the first input of the coincidence element, the second input of which is connected to the output of the analog-digital converter and its output is connected to the input of the second trigger, the input of which is connected to the information output of the digital counter in O, the direct output of the second is connected to the starting input of the pulse former and the second input of the switch Tatorey.

The invention relates to electrical engineering and relates to the monitoring of parameters, in particular, capacity when charging a battery (AB), most often used as an autonomous source of electrical energy at various facilities.

It is known a device for supplying a load, containing a source of charge current, an AB, in the circuit of which charge and discharge current sensors are connected, the outputs of which are connected to the counting inputs of a reverse ampere-hour counter, the output of which is connected to the input of a charge current regulator. the current sensor transmission coefficient, the output connected to the inputs of the charge and discharge current sensors, and the battery charge termination sensor connected to the equalizer input and the reset terminal of the ampere-hour meter to the fixed counting state TI C.

In this device, the control of the AB capacity reserve is carried out according to the indication of the ampere-hour counter, which integrates the AB current, taking into account the AB efficiency when operating in one or another charge and discharge mode. However, in many practical cases, AB is used to power consumers, in which continuous monitoring of its parameters, including capacity reserves, is not performed. When zar de

Such an AB is a matter of principle to determine the residual capacity of an AB, for example, in order to calculate the necessary time to restore AB functional readiness, which this device does not provide.

It is also known a device for monitoring capacitance of an AB containing a test load connected to a battery via a power electronic switch (EC) voltage source, a comparison circuit, a multivibrator, a trigger, a reference frequency generator, an additional EC, a pulse counter, a decoder, a digital indicator and system management measurement. The comparison SCRMA is connected to the AB by the second input, to the second input to the voltage source, and its output is connected to the first trigger input, to the second input of which the multivibrator output is connected, which is also connected to the second input of the power EC. Output trig25

Gera is connected to the first input of the additional EC, the second input of which is connected to the output of the pulse generator of the reference frequency. The output of the additional EC is connected to the input of the pulse counter connected to the output with a digital indicator via a decoder. A measurement control system with its output is connected to the input of the G23 multivibrator. This device is designed to determine the size of the capacitance AB, however, its principle of operation is based on the use of the dynamic characteristic of the AB, which largely depends on the mode of the previous discharge (charge) and the time elapsed since its termination. Therefore, a reliable result of monitoring the capacity of the battery when using a known device can be obtained after a long time has passed since the end of the normal use of the battery, which increases the recovery time of the functional readiness of the battery. In addition, the device is difficult and requires careful configuration. The closest to the proposed technical entity is a charging system containing an AB, a minimum voltage relay, a charge current regulator (NWT), a discharge current regulator (CPT), a voltage regulator (CH), a switch (relay), a driver pulses (FI) and a digital counter (TsSCh). AB through the contacts of the switch is connected to the relay of the minimum voltage and through the corresponding contacts of the latter to the CPT and NWT. The contacts of the undervoltage relay are included in the switching circuit of the PSCH, the output of which is connected to the control input of the switch (relay winding), and the input is connected to the FI. The power supply circuit of the CSSC is connected to the output of the CH C3J. In the known device for determining the value of the battery capacity, the battery is produced at discharge at the moment when the undervoltage relay triggers to the voltage threshold corresponding to the specified discharge current AV of a certain residual capacity. The preliminary (additional) discharge of an AB to a certain minimum voltage causes an unproductive deep cycling of the AB, which reduces its service life. The time spent on the preliminary discharge increases the duration of bringing the AB to full functional readiness. In addition, during the preliminary discharge, the energy previously accumulated in the AB is wasted uselessly, which reduces the efficiency of the charge system. The purpose of the invention is to reduce the charge time, the efficiency and the service life of the battery. This goal is achieved by the fact that the charging system containing a battery (AB), for example, nickel-cadmium, charge, random and discharge current stabilizers (NWT and CPT), connected to the AV via a switch, and a pulse shaper ( PI) output connected to the counting input of a digital counter (TsSCh), whose power buses are connected through a voltage regulator (CH) to the output terminals of the battery, is equipped with a functional converter (AF) that simulates the dependence of the residual capacitance AB on the magnitude of its discharge voltage m key (EC), analog-to-digital converter (ADC) and control and monitoring unit (ICU), with the FP input connected to terminals AB through EC, and the output connected via ADC to the adjusting input of the CSC, the control unit inputs connected to the output of the ADC and information output The MSC and the outputs are connected with the control input of the EC, the starting input of the FI, and the control of the first and second inputs of the switch. In this case, the FP, which simulates the dependence of the residual capacitance of the AB on the magnitude of its discharge voltage, is made in the form of an operational amplifier (OC) with a diode in the feedback circuit. In addition, the BUD is made in a complete logic circuit consisting of two triggers, delays and a match element, the input of the first trigger is connected to the start input of the internal control unit, to which the input of the delay element is also connected, the output of the delay element is connected to the input that sets the first trigger in O, the forward output of which is connected to the first input of the switch and EC , but its inverse output is connected to the first input of the coincidence element, the second input of which is connected to the output of the ADC, and its output is connected to the input of the second trigger, which sets the input of which is connected to the information output of the TsSCh, the forward output of the second trigger and the second control input of the switch. FIG. 1 shows a functional: 4 electric scheme of the proposed system; in fig. 2 is a graph of the dependence of the residual capacitance of a nickel-cadmium DB on the magnitude of its discharge voltage realized by M1. The charging system contains nickel-cadmium AN 1 NWT 2, CPT 3, switch 4, 4 5, TsSCh 6, CH 7, FP 8, which simulates the dependence of the residual capacitance of the battery on the magnitude of the discharge voltage, EC 9, ADC 10 and BKU 11 DB 1 is connected to the NWT 2 and CPT 3 via the contacts of the switch 4. The BKU 11 consists of the triggers 12 and 13, the delay element 14 and the coincidence element 15. RS-flip-flops can be used as triggers 12 and 13. The starting input of the BKU 11. Is connected to the 5 input of the trigger 12, Between the inputs S and R of the trigger 12, the delay element 14 is turned on. The direct output of Trigger 12 is connected to the first input of the switch 4 and the control input EK 9. The inverse output of the trigger 12 is connected to the first input of the match 15, the second input of which is connected to the output of the ADC 10. The output of the match 15 coincides with S - trigger input 13. Its P input is connected to the information center of the PSCC 6. Forward output of the trigger 13 is connected to the start input of FI 5 and the second input of switch 4. PH output 5 is connected to the counting input of the PSC 6, the power supply bus of which is connected to the output glues DB 1 through CH 7. OP 8 input is connected through the E To 9 to the output terminals DB 1, and the output is connected to cerebral palsy 10, the output of which is connected with the resetting input of the PSC 6 to the initial counting state. in a feedback loop, a series connection of adjustable resistance 18 and diode 19. By adjusting adjustable resistances 17 and 18, the required proportionality of the parameters of the simulated AF 8 dependence is achieved (Fig. 2). Cerebral palsy 10 can be performed according to gauge lime analog-code converter circuit. The power buses of FI 5, OP 8, cerebral palsy 10, and BKU 11 are connected to the output of CH 7 (not shown); The charging system works as follows. In the initial state, DB 1 is disconnected from NWT 2 and CPT 3. Triggers 12 and 13 are in the zero position. FI 5 does not generate signals. The state of the MSC 6 may be any. 4 When a signal is received at the start-up input of the BKU 11, the trigger 12 is moved to a single position. The signal from the direct output of the trigger 12 to the first input of the switch 4 and the control input EC 9. Under the action of the signal at the first input, the switch 4 connects AB 1 to CPT 3. The discharge of AB 1 is stabilized with current Er. EC 9 opens and the input voltage 16 through the resistance 17 is applied to the value of the discharge voltage AB 1 Up, corresponding to the value of the current Er. Due to the large input impedance of the op-amp 16, its output signal is proportional to the current flowing in the feedback circuit, which is limited by the impedance 18 and repeats the law of variation of the diode track 19. Thus, the output signal of the op-amp 16 is a quadratic dependence on the input signal with a proportional coefficient , determined by the ratio of the resistance values 18 and 17. However, as shown in FIG. 2, it is precisely this dependence that the value of the residual capacity of the nickel-cadmium discrete diode has on the value of the discharge voltage Op with a fixed discharge current. Therefore, the OP 8 implements the dependence of the residual capacity of the discrete breathers on I. . values of the discharge voltage Odb € (Up) Zr Const. Thus, at the output of the FP 8, a signal is formed that is proportional to the residual capacity of DB 1. DCP 10 converts the output signal of the FP 8 into a digital code, which is recorded in the CSCH 6. At the same time, the DCP 10 generates a signal in the control unit 11 which in the vice potential level is fed to one of the inputs of the gate 15, a match. After the time i has elapsed, the signal from the output of the delay element 14 is applied to the p input of trigger 12, under which the trigger 12 returns to its original position, the EC 9 closes. Co-switch 4 disconnects DB 1 from CPT 3. The time delay of the signal T in the element 14 is chosen so that the condition is satisfied, where g is the transition time of voltage change Up When switched on with current E, the time interval during which the value is recorded . A single signal from the inverse output of the trigger 12 is fed to the second input of the element 15 coincidence and opens it. Under the action of the signal at the 5 - input, trigger 12 is thrown to the unit position. The signal from the direct output of the trigger 13 is fed to the second input of switch 4 and to the PE input 5. Under the action of a signal from the second input, switch 4 connects AB 1 to NWT 2, and the battery begins to charge with a stabilized current 3,. FI 5 generates signals with a fixed repetition rate f, which are fed to the counting input of the PSCC 6. Thus, the current value of the charging capacitance AB QJ is recorded in the PSCC 6 where T3 is the charge time. When the charge capacitance AB 1 reaches the required value, the information output of the CSCh 6 generates a signal arriving at the r-out

adb

the trigger trigger 13. The trigger 13 returns to its original position, FI 5 is turned off, AB 1 is disconnected from NWT 2. Zar d AB 1 is over. Thus, in the proposed system, the determination of the residual capacity of the battery is performed with a short (control) switching on the battery for a discharge during the time interval t, which is significantly less than the time of discharge of the battery to a given (initial) level spent in the prototype, which leads to a reduction in the required time to bring the AB into functional readiness and eliminates unproductive deep cycling of the AB, and consequently, reduces the consumption of the resource of the AB and increases the efficiency. In comparison with the prototype, the proposed system a charge ensuring faster driving state SB in complete functional readiness by approximately 20%, the Enhance efficiency on average by 20% and increase the life of AB nearly 100 cycles.

Claims (3)

1. The CHARGE SYSTEM, containing a storage battery, for example, a nickel-cadmium battery, a charge current stabilizer and a discharge current stabilizer connected to the battery through a switch, and a pulse shaper output connected to a counting input of a digital meter, the power bus of which is connected through a voltage regulator to output terminals of the battery, characterized in that, in order to reduce the charge time, increase the QCD and increase the service life of the battery, it is equipped with a functional a transmitter that simulates the dependence of the residual capacity of the battery on the value of its discharge voltage, an electronic key, an analog-digital converter and a control and control unit, the functional converter being connected to the battery terminals via an electronic key, and connected via an analog-to-digital converter to an installation input of a digital · Counter, control unit and inputs are connected to the output of an analog-digital converter and the information output of a digital account ika and outputs - to the control input of the electronic key, the trigger input of the pulse shaper and controls the first and second inputs com- 'Tatorey. 2. The system by π. 1, with the fact that a functional converter simulating the dependence of the residual capacity of the battery on the value of its discharge voltage is made in the form of an operational amplifier with a diode in the feedback circuit. 3. Pop system. ^ characterized in that the control and management unit is made in the form of a logic circuit consisting of two triggers, a delay element and a coincidence element, the input of the first trigger being connected to the starting input of the control and control unit, to which the input of the delay element is also connected, the output of the delay element connected to an input that sets in O '* the first trigger, the direct output of which is connected to the first input of the switch and the electronic key, and its inverse output is connected to the first input of the match element, the second input of which is connected ene to yield an analog-digital converter and its output connected to the input of the second flip-flop, setting the 0 input of which is connected to the data output of the digital counter, the output of the second line is connected to the trigger input of the pulse shaper and vtorm input switch.