SU1665430A2 - Device for checking state of change of storage battery - Google Patents

Abstract

The invention relates to electrical engineering and can be used to control batteries in electric transport and in devices with uninterrupted power supply by electrical equipment and other responsible consumers. The aim of the invention is to increase reliability and enhance functionality. The device contains a battery, two voltage-to-frequency converters, a pulse generator, a correction unit, an ampere-hour meter, a multiplication unit, a digital indicator, and a control signal generator. A device for periodically certifying meter readings for zero and nominal values of capacitance is inserted into the device, which contains an elemental control unit, a driver for the charge end indicator signal and a correction signal driver. The device allows for each charge-discharge cycle to automatically correct the readings of the ampere-hour meter according to criteria such as charge up to the nominal capacity (during the charge process), or sparseness to the minimum acceptable value. 1 il.

Description

The invention relates to electrical engineering and can be used to control batteries in electric transport and in devices with uninterrupted power supply by electrical equipment and other responsible consumers.

The aim of the invention is to increase the reliability of the controls and expand the functionality.

The drawing shows a block diagram of the proposed device.

The device contains a battery 1 with a temperature sensor 2, in current

The circuits with which the current sensor 3 is connected. The voltage from sensor 3 through measuring amplifier 4 is fed to the inputs of two voltage-to-frequency converters 5.6 and polarity determiner 7. The output of voltage-to-frequency converter 5 is connected to one of the inputs the OR 8 circuit, to the second input of which a pulse generator 9 is connected, the frequency of which is regulated by the regulator 10. The output of the OR circuit 8 is connected to the information input of the counter-ampere hours 11, the output of which is connected to the digital indicator through the multiplication unit 12 13 and one of the inputs of the signal conditioner

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control 14. The second input of multiplication unit 12 is connected to thermal sensor 3.

The second voltage-to-frequency converter 6 is connected via a programmable divider 15 to the input of the correction unit 16, with one of the outputs of the setting unit 17 of the capacity codes and one of the inputs of the control signal generator 14. The outputs of the setting device 17 are connected to one of the inputs of the reversible counter of the ampere-hours 11 and the driver 14 of the control signal.

Correction unit 16 contains a timer 18 connected to counter decoder 19 and memory block 20, the output of which is connected to the corresponding inputs of the key groups 21.22 of the charge and discharge control modes, respectively. The other inputs of these switches are connected to the output of the polarity determiner 7, and the outputs to the control input of the voltage-to-frequency converter 5.

The node 23 of the periodic attestation of the readings of the counter 11 contains the element-by-element control 24, the shaper 2.5 of the battery charging signal and the shaper 26 of the meter correction signal, the input of each of the elements 24.25, the number of which is determined by the number of cells in the battery 1 , connected to the outputs of the respective elements of the battery, and the outputs to the inputs of the correction signal generator 26. The output of the latter is connected to the corresponding input of the counter ampere-hours 11.

The device works as follows.

The current flowing through the current sensor 3 in the process of charging or discharging the battery 1 creates a voltage drop across it, which is fed to the inputs of the voltage-to-frequency converter 5.6 to the frequency and the polarity indicator 7. The output pulses from the converter 5, whose frequency is proportional to the input voltage, through the circuit OR 8 are fed to the information input of the reversible counter ampere-hour 11, which accumulates information about the current state of the battery 1.

The signal arriving at the other input of the counter 11 with the determinant 7 polarity, sets the counting direction (direct - during charging, reverse - when the battery is discharged).

The pulses from the converter 6, the frequency of which is also proportional to the voltage from the current sensor 3, through the programmable divider 15 are fed to the input of the counter-decoder 19 of the correction unit 16. A decoder counter 19 accumulates these pulses during a certain counting period determined by timer 18. At the end of the counting period, the output is

the counter-decoder 19, the code combination is written to the memory unit 20, after which the counter 19 is reset to the zero state. Using the memory block 20, the code combination enters the two groups of keys for controlling the mode of charge 21 and the mode of discharge 22. The signal arriving at these keys from the polarity determiner 7 determines the group of keys that are currently in operation

5 states. The signal from the output of these keys, arriving at the control input of the converter 5, discretely changes the conversion coefficient, thus achieving an approximation of the charge and discharge curves.

0 Digital indicator 13 displays information on the degree of battery charge directly in ampere hours or as a percentage of the nominal capacity. Shaper 14 serves for

5 broadcast information about the state of the battery to the peripheral device, in particular, to the executive element of the automatic unit of the power supply system.

0 The entered node 23 of the periodic attestation of meter readings for zero and nominal values of capacity works as follows.

When the battery is charged,

5 as soon as the capacitance of the latter reaches the nominal value or the maximum allowable under the given operating conditions, with the help of the signal generator of the end indicator generates a signal

0 Q100%, which through the shaper 26 of the correction signal enters the counter 11 ampere-hours. In this case, the readings of the digital indicator 13 and from the control signal generator 14 in the

5, a signal is transmitted that ensures that the charging device is transferred from the charging mode to the battery containing mode.

Similarly, in the battery discharge mode, as soon as the voltage of any of the cells decreases to the minimum permissible value, a 00% signal comes from the element-by-element control unit, which through the signal conditioner 26

5 correction enters the counter 11 ampere hours. In this case, the digital indicator 13 displays information about the zero value of the battery capacity, and a signal is sent to the automation unit to disconnect the battery from the load.

Claims (1)

Thus, the device allows for each charge-discharge cycle to automatically correct the readings of the ampere-hour counter and thereby eliminate measurement errors associated with incorrectly setting the primary value of the capacitance, as well as with the error in approximating charge-discharge characteristics . Claims of Invention A device for monitoring the degree of charge of a battery according to the author. Ev. No. 1377937, characterized in that, in order to increase reliability and functionality, a node for periodic certification of meter readings for zero and nominal values of battery capacity is introduced, consisting of a correction signal generator, the output of which is connected to the corresponding input of an ampere-hour meter, an element control unit and a signal generator of a battery end indication battery, the inputs of which are connected to the corresponding elements of the battery, and the outputs - to the inputs of the specified driver correction signal. 21 22 telonu element of the block machine