RU19926U1 - BATTERY CONTROL DEVICE - Google Patents

Abstract

A battery monitoring device comprising terminals for connecting the monitored battery cells, a differential amplifier, a clock generator whose output is connected to the counter input and a first battery cell switch controlled by the meter, the analog inputs of which are connected to the terminals of the monitored battery cells, characterized in that the device additionally introduced a second switch, an isolating amplifier, a shaper "Address gates", the input of which is connected to the output of the clock generator, the first, second and third decoders, the inputs of which are connected to the output of the counter, an OR element and a voltage reference source, while the first, second and third analog inputs of the second switch are connected to the outputs of the differential amplifier, the reference voltage source and the common wire, respectively and its output is to the input of an isolating amplifier, while the first address input of the second switch is connected to the outputs of the first decoder and shaper "Address gates" through the element "OR", the second address input of the second to the switch is connected to the output of the second decoder, the output of the third decoder is connected to the input "Reset" of the counter, and the output of the isolation amplifier is designed to connect to the channel of the telemetry control system of the product.

Description

Battery control device

of batteries

The utility model relates to electrical engineering and can be used for telemetry control

various current sources (chemical or photoelectric) with a large number of monitored elements, including for telemetric monitoring of storage batteries (AB) and charge-discharge devices of these sources with any number of elements, for example, at space stations.

A device for telemetry monitoring

battery 1, containing for each monitored battery cell a differential amplifier, the input of which is connected to the circuits of the monitored battery element, and an isolating amplifier, the input of which is connected to the output of the operational amplifier, and the output is designed to connect to one of the channels of the telemetric monitoring system of the space station, further products.

The disadvantages of the telemetry control device include the need to use a large number of rather complex and expensive isolating amplifiers designed for the galvanic isolation of telemetry devices and channels, as well as a large number of telemetry channels necessary for product monitoring.

These disadvantages reduce the reliability of the product and significantly increase the mass and cost of the product, especially with a large number of controlled

MPK7 G01R31 / 36, N01M10 / 48

elements, which is typical with stringent requirements for product reliability.

There is also known a battery monitoring device 2, adopted as a prototype, containing terminals for connecting the monitored battery cells, a differential amplifier, a clock generator whose output is connected to the counter input, and a first battery cell switch controlled by the counter, the analog inputs of which are connected to the terminals of the monitored cells batteries.

The disadvantage of the device when it is used for telemetric monitoring of the battery should be attributed to the large error of telemetry data, as well as low noise immunity due to the lack of information in the output signal necessary for calibrating the level of the telemetry signal, as well as the difficulty of unambiguously determining the correspondence of telemetry signals to specific battery cells when failures in the transmission of information in the channels of the telemetry system.

The task to which the creation of the claimed device is directed is to increase the accuracy of information transfer and increase the noise immunity of telemetric control compared to the prototype, as well as a significant reduction in the cost of the product compared to the device currently used.

The proposed technical solution is especially effective in monitoring rechargeable and other batteries, as well as power supply systems in general, having a large number of elements and stringent requirements for the metrological parameters of the system.

The problem is solved in that in the battery monitoring device containing terminals for connecting the monitored battery cells, a differential amplifier, a clock generator whose output is connected to the counter input and a counter-controlled first battery cell switch, the analog inputs of which are connected to the terminals of the monitored battery cells , a second commutator, an isolating amplifier, an address gate generator, whose input is connected to the clock output, was introduced of the second generator, the first, second and third decoders, the inputs of which are connected to the counter output, the OR element and the voltage reference source, while the first, second and third analog inputs of the second switch are connected to the outputs of the differential amplifier, the reference voltage source and the common wire, respectively, and the output of the second switch is to the input of an isolating amplifier, while the first address input of the second switch is connected to the outputs of the first decoder and shaper of address gates through the OR element, the second address the first input of the second switch is connected to the output of the second decoder, a third decoder output is connected to the reset input of the counter, and the output of an insulating amplifier for connecting to the channel telemetry system product.

In figure 1, a block diagram of a battery monitoring device is shown.

The device contains KI ... KN terminals for connection to

monitored elements 3i ... 3n of the battery 1, the first switch of the elements of the battery 2, the analog inputs of which are connected to the control terminals K ... Km of the battery 1, and the analog outputs with the input of the differential amplifier 3, the second switch 4, isolation amplifier 5, clock generator 6, counter 7, address gate shaper 8, first 9, second 10, and third 12 decoders, address gate shaper 8, as well as an OR 11 element and a voltage reference source 13. The analog inputs of the second switch 4 are connected to the outputs of the differential a social amplifier 3, a reference voltage source 13 and a common wire 14, respectively, the first address input of the second switch 4 is connected to the outputs of the first decoder 9 and the address gate generator 8 through the element 11 OR, the second address input of the second switch 4 is connected to the output of the second decoder 10, output the clock generator 6 is connected to the inputs of the counter 7 and the shaper of the address gates 8, and the output of the counter 7 is in turn connected to the address inputs of the first switch 2 and to the inputs of the decoders 9,10 and 12.

Newly introduced elements are intended:

reference voltage source 13 - for transmitting the reference voltage used in the calibration (calibration) of telemetry signals;

the first 9 and second 10 decoders - for organizing marker signals "start cycle and" stop cycle when transmitting sequences of monitored parameters of batteries in cycles, that is, to synchronize the beginning and end of transmission cycles;

shaper of address strobes 8 — for synchronization and sequential transmission of the address following the controlled parameter AB in a cycle;

start-stop and reference signals of address gates to a telemetric signal;

isolating amplifier 5 is designed to transmit controlled parameters of the battery through galvanic isolation in the telemetry control system (STK) of the product.

Figure 2 presents the sequence diagram of the device.

The sequence of operation of the device is as follows.

The measured information signals are transmitted continuously in cycles following one after another. Each cycle includes an impulse Start cycle, n - the number of Address gates and an impulse Stop cycle.

Each cycle begins with a pulse. Start of a cycle with a level of zero potential potential of the device’s common wire, the duration of which is determined by the pulse repetition period of the device’s clock 6. After the Start cycle impulse, the measured parameters are sequentially transmitted (voltage levels of the AB section, or any other measured values, for example, AB current, load current, etc.).

The measured parameters are transmitted in a strictly defined sequence, which is specified by the user documentation telemetry. The transmission of each measured parameter begins with the formation of the Address Gate (AC), the number of which indicates the parameter that will be transmitted after it, see figure 2. The AC level is uniquely set by the reference voltage source 13 (ION) and therefore has a value of the maximum specified calibration voltage, and the level of the parameter transmitted behind it will be between the level of the zero potential transmitted

Start cycle pulse and speaker calibration level. The duration of the speaker is set by the shaper 8, and the transmission duration of the speaker + parameter is equal to the pulse period of the clock generator 6 (Fig.1).

Measurements are transferred in a loop through an isolating amplifier 5, starting from AC No. 1 + parameter and ending with AC No. n + parameter, after which a Stop cycle pulse is formed, the duration of which is equal to the pulse repetition period of clock generator 6 and has the level of maximum ion calibration voltage.

The device operates as follows.

The clock generator 6 generates clock pulses, which are input to the counter 7 and the address gate shaper 8. The counter 7 sets a sequentially increasing code on the address inputs of the first switch 2, and thereby, sequentially connects its inputs to sections A1 - EP AB1, as a result of which the voltage of each section from the output of the first switch 2 is sequentially fed to the input of the operational amplifier 3, and from its output to the first analog input of the switch 4.

The serial transmission of parameters (voltage of sections AB1) begins with the initial installation by the counter of address 0 at the address inputs of the first switch 2 and ends with address p.

Thus, the edge of each clock pulse 6 at the address input of the first switch 2 will establish the address of the measured section, while through the first switch 2 and operational amplifier 3 at the first input of the switch 4 the voltage of the measured section (for example, the first section) will be established, but this voltage will not get from the output of the differential amplifier 3 to the input of the isolation amplifier 5 due to that.

that along the same front of the clock pulse, the driver 8 through the AND OR element will set the signal 1 at the first address input of the switch 4, which activates its second input, as a result of which the first voltage pulse of the Address strobe (corresponding to the number of the measured section AB1) will arrive at the input of the isolating amplifier 5 ( AC No. 1 in figure 2) the duration of which is determined by the shaper 8, and its level is the source of the reference voltage 13. At the end of the pulse of the Address strobe, code 0 is set at the address input of the switch 4, which activates t its first input and the voltage of section E1 from the output of the differential amplifier 3 will go to the input of the isolating amplifier 5.

On the front of the second clock pulse at the output of the isolation amplifier 5, in accordance with the process described above, the Address strobe AC No. 2 will appear, and after it the voltage of the measured section E2 AB1 will be established.

Further, the process repeats and ends when the voltages of all n sections of AB1 are measured, after which counter 7 sets the address equal to n + 1, which sets the signal with level I at the output of the first decoder 9, and it is installed through the 11 OR element at the first address input the second switch 4, and through its second input at the output of the isolating amplifier 5, a Stop cycle pulse is formed with the amplitude of the IED 13 and a duration equal to the pulse repetition period of the clock generator 6.

On the edge of the next clock pulse, counter 7 will set the address n + 2, which will set the output to level 1 at the output of the second decoder 10, and it will go to the second address input of switch 4, and due to the generated address 01, through the third input of switch 4, the zero potential of the total device wires will be input

isolating amplifier 5, and a marker pulse of the start of the cycle is formed at its output, the duration of which is equal to the pulse repetition period of the clock generator 6.

On the edge of the next clock pulse, counter 7 will set the address n + 3, which at the output of the third decoder 12 will set a signal with level 1, which will go to the input Reset counter 7. Counter 7 is reset, i.e. returns to its initial state, and address 0 will be set at the address input of the first comparator 2, which will ensure that its inputs are connected to section E1 AB1. Thus, the process of sequential measurement and transmission of voltage sections AB1 through an isolating amplifier 5 in the telemetry control system is repeated.

At the same time, the marker pulse level of the Start cycle always corresponds to the level of the device’s common wire, and the marker pulse of the Stop cycle and Address gates always have the level of the reference voltage source, which allows using the indicated signals as calibration signals for decoding the controlled parameters of the battery sections from U1 to Un, levels which are in the range between the two calibration levels discussed above.

The inclusion of marker pulses and Address strobes in the serial transmission path of the analog telemetric signal allows not only clearly organizing the transmission cycles of the measured analog parameters of the battery (AB) by separating the cycles with start-stop marker pulses, and using Address Strobes to unambiguously determine the correspondence

of telemetered parameters to specific AB sections, but also due to the fact that the indicated marker pulses and Address strobes contain information about calibration (calibration) levels, it can significantly increase

accuracy of information transfer and noise immunity of telemetric control in comparison with the prototype, as well as reduce the weight, volume and cost of the product as a whole.

The proposed technical solution gives a significant gain in the control of rechargeable and other batteries, as well as power supply systems in general, having a large number of monitored elements or assemblies and stringent requirements for the metrological parameters of the system.

Sources of information:

1. BU-V control of a charge-discharge device, EIGA.468333.026 TU, Voronezh, NPKO Energia, 1999.

2. Certificate of the Russian Federation No. 16208, cl. G 01 R 31/36, H 01 M 10/48, BIPM No. 34 of June 9, 2000 (prototype)

Claims (1)

A battery monitoring device comprising terminals for connecting the monitored battery cells, a differential amplifier, a clock generator whose output is connected to the counter input and a first battery cell switch controlled by the meter, the analog inputs of which are connected to the terminals of the monitored battery cells, characterized in that the device additionally introduced a second switch, an isolating amplifier, a shaper "Address gates", the input of which is connected to the output of the clock generator, the first, second and third decoders, the inputs of which are connected to the output of the counter, an OR element and a voltage reference source, while the first, second and third analog inputs of the second switch are connected to the outputs of the differential amplifier, the reference voltage source and the common wire, respectively and its output is to the input of an isolating amplifier, while the first address input of the second switch is connected to the outputs of the first decoder and shaper "Address gates" through the element "OR", the second address input of the second to the switch is connected to the output of the second decoder, the output of the third decoder is connected to the input "Reset" of the counter, and the output of the isolating amplifier is designed to connect to the channel of the telemetry control system of the product.