CN203688781U - Digital storage battery quantity monitoring device - Google Patents
Digital storage battery quantity monitoring device Download PDFInfo
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- CN203688781U CN203688781U CN201420007765.3U CN201420007765U CN203688781U CN 203688781 U CN203688781 U CN 203688781U CN 201420007765 U CN201420007765 U CN 201420007765U CN 203688781 U CN203688781 U CN 203688781U
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- operational amplifier
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- storage battery
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Abstract
The utility model discloses a digital storage battery quantity monitoring device which comprises a Holzer sensor, an integrating circuit, an integrating capacitor discharge circuit and a pulse generating circuit. The Holzer sensor detects the charge and discharge current of a storage battery, and the current is converted into a voltage signal which is subjected to integration. A pulse is generated when the integration reaches certain voltage, then an integrating capacitor carries out discharging, and the next integration is carried out. The pulse represents certain quantity of electricity, the charge and discharge quantity of the storage battery can be known through counting the quantity of electricity, and the predication of the capacity of the storage battery is realized. The digital storage battery quantity monitoring device is used for a storage battery monitoring part, the device has the advantages of simple operation, practicality and convenience, a result is accurate to the concrete numerical value of storage battery storage charge amount, and the online accurate digital monitoring of battery quantity monitoring is realized.
Description
Technical field
The utility model relates to battery condition monitoring field, is specially a kind of digital accumulator electric quantity monitoring device.
Background technology
The research of accumulator electric-quantity scheme is significant.Accumulator is the standby power supply of each application using electricity system, is the important stored energy mechanism of new energy resources system, and therefore, the quality of battery-operated state is directly connected to the normal operation of whole system.We will give full play of the potential ability of accumulator, can stablize, for a long time, efficient operation.More and more refinement of the research work of this direction, more and more practical, stable, the efficient operation of energy field does not provide safeguard.
Current, be all generally to monitor realizing of its residual capacity by open-circuit voltage method, ampere-hour method, internal resistance method for the on-line monitoring of accumulator electric-quantity, these methods no doubt can realize the one monitoring to electric weight, but these methods have its limitation.For example Method and Open must be at accumulator not in use, and continual and steady more than 2 hours; The discharge current of ampere-hour method battery can not be necessarily constant; Internal resistance method can only provide some early stage forecast informations of accumulator.And be all to accumulator electric-quantity estimated value, cannot accurately provide a value taking electric charge C as unit and react accurately the electric weight of accumulator.
Generally speaking, be difficult at present accumulator to realize accurate online electric quantity monitoring.
Utility model content
The purpose of this utility model is the digital accumulator electric quantity monitoring device proposing for the feature for Inspecting Storage Battery SOC solves the problem of prior art existence.It can realize precision and digitized on-line monitoring to storage battery charge state.
The utility model is realized by following technical scheme:
Digital accumulator electric quantity monitoring device,, digital accumulator electric quantity monitoring device, it is characterized in that comprising Hall element, integrating circuit, integrating capacitor discharge circuit, pulse generating circuit sum counter, Hall element is connected with integrating circuit, integrating capacitor discharge circuit is connected with the electric capacity two ends in integrating circuit, pulse generating circuit is connected with the output terminal of integrating circuit, and pulse generating circuit is connected with counter.
Described integrating circuit comprises the first resistance, the second resistance, the first electric capacity, the second electric capacity, the first diode, the second diode, the first operational amplifier, the second operational amplifier and phase inverter, wherein the input end of first resistance one end and phase inverter is connected in Hall current sensor output terminal, the end of oppisite phase of another termination the first operational amplifier of the first resistance, the first electric capacity is connected the first operational amplifier end of oppisite phase with the first diode anode after the first diodes in parallel, the first diode cathode is connected in the first operational amplifier output terminal, phase inverter is connected the second operational amplifier end of oppisite phase with after the second resistance series connection, the second electric capacity is connected the second operational amplifier end of oppisite phase with the second diode anode after the second diodes in parallel, the second diode cathode is connected in the second operational amplifier output terminal.
Further, described integrating capacitor discharge circuit comprises the first analog switch, the second analog switch, wherein the first analog switch and the first Capacitance parallel connection, the control end of the first analog switch is connected with inverse current output pulse ends, the second analog switch and the first Capacitance parallel connection, the control end of the second analog switch is connected with forward current output pulse ends.
Further, described pulse generating circuit comprises the 3rd resistance, the 4th resistance, the first voltage comparator, second voltage comparer, the 3rd resistance is connected between the first operational amplifier output terminal and the first voltage comparator positive terminal in integrating circuit, the reference voltage that the anti-phase termination of the first voltage comparator is set, the first voltage comparator output termination inverse current output pulse ends, the 4th resistance is connected between the second operational amplifier output terminal and second voltage comparer positive terminal in integrating circuit, the reference voltage that the anti-phase termination of second voltage comparer is set, second voltage comparator output terminal connects forward current output pulse ends.
The measuring method of digital accumulator electric quantity monitoring device is: in the time that accumulator is discharge condition, Hall element converts current signal to negative voltage signal, integrating circuit carries out integration to this voltage signal, while being integrated to setting voltage, pulse generating circuit produces a discharge electricity amount pulse, and by integrating capacitor discharge circuit, the integrating capacitor of integrating circuit is discharged, then carry out integration next time, when accumulator is that charged state Hall element converts current signal to positive voltage signal, by a phase inverter, convert negative voltage signal to, integrating circuit carries out integration to this voltage signal, while being integrated to setting voltage, pulse generating circuit produces a charge capacity pulse, and the integrating capacitor of integrating circuit is discharged, then carry out integration next time, with counter respectively to charge in batteries electric pulse and discharge electricity amount step-by-step counting, do again subtraction, carry out storage battery charge state monitoring.
Compared with prior art, the utlity model has following advantage and technique effect:
The utility model detects accumulator cell charging and discharging electric current by Hall element, convert voltage signal to, it is carried out to integration, be integrated to certain voltage and then produce a pulse, and integrating capacitor is discharged, then carry out integration next time, this pulse represents certain electric weight, this pulse is counted to the just charge/discharge electricity amount of known accumulator, and realize the prediction to storage battery charge state.The utility model is for accumulator monitoring, and monitoring device forms simple, and monitoring method is easy to operate, can be as accurate as the concrete numerical value of the accumulator accumulate quantity of electric charge, makes monitoring cell electricity quantity thoroughly realize online precise figures formula monitoring.
Brief description of the drawings
Fig. 1 digital accumulator electric quantity monitoring of the present utility model device is electric quantity monitoring schematic block circuit diagram in the time that Hall element passes through inverse current.
Fig. 2 digital accumulator electric quantity monitoring of the present utility model device circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and example, enforcement of the present utility model and protection are described further, but enforcement of the present utility model and protection are not limited to this.
Fig. 1 has provided the Hall element of digital accumulator electric quantity monitoring device by the schematic block circuit diagram of inverse current electric quantity monitoring.Digital accumulator electric quantity monitoring method adopts Hall element, integrating circuit, integrating capacitor discharge circuit and pulse generating circuit, integrating circuit comprises capacitor C, resistance R and operational amplifier U, diode D, the voltage signal Vi to Hall element output in integrating circuit carries out integration, while being integrated to setting voltage, pulse generating circuit produces a discharge electricity amount pulse, and by integrating capacitor discharge circuit (gauge tap K), the integrating capacitor of integrating circuit is discharged, then carry out integration next time.
In Fig. 1, the voltage signal Vi of Hall element output, can export a voltage V0 through computing integrating circuit.Its mathematical relation is as follows:
V
i=KI （1）
Wherein I is the electric current through Hall element.K is that hall sensing current conversion is a scale-up factor of voltage signal, and R is the resistance of resistor in integrating circuit, and C is the capacitance of capacitor in integrating circuit.
By (1), (2) two formulas, we can release
Can find out that V0 and Δ Q electric weight are linear, V0 can represent a certain amount of Δ Q.Therefore suppose that the every magnitude of voltage of V0 produces a pulse, this pulse can represent certain electric weight.Then electric capacity is discharged, can carry out integration circulation next time.For example, as long as the number of this pulse is added up to (by the counter in single-chip microcomputer, it being counted), be then multiplied by certain scale-up factor and just can obtain the electric weight gain and loss of accumulator.
Fig. 2 has provided the circuit theory diagrams (resistance not marking in figure is stake resistance) of digital accumulator electric quantity monitoring device.In figure, integrating circuit comprises the first resistance R 1, the second resistance R 2, the first capacitor C 1, the second capacitor C 2, the first diode D1, the second diode D2, the first operational amplifier U1, the second operational amplifier U2 and phase inverter U3, wherein the input end of first resistance R 1 one end and phase inverter U3 is connected in Hall current sensor output terminal, the end of oppisite phase of first resistance R 1 another termination the first operational amplifier U1, first diode D1 anodic bonding the first operational amplifier U1 end of oppisite phase after the first capacitor C 1 is in parallel with the first diode D1, the first diode D1 negative electrode is connected in the first operational amplifier U1 output terminal, phase inverter U3 is connected the second operational amplifier U2 end of oppisite phase with after the second resistance R 2 series connection, second diode D2 anodic bonding the second operational amplifier U2 end of oppisite phase after the second capacitor C 2 is in parallel with the second diode D2, the second diode D2 negative electrode is connected in the second operational amplifier U2 output terminal.Integrating capacitor discharge circuit comprises the first analog switch K1, the second analog switch K2, wherein the first analog switch K1 is in parallel with the first capacitor C 1, the control end of the first analog switch K1 is connected with inverse current output pulse ends, the second analog switch K2 is in parallel with the first capacitor C 2, and the control end of the second analog switch K2 is connected with forward current output pulse ends.Pulse generating circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the first voltage comparator U4, second voltage comparer U5, the 3rd resistance R 3 is connected between the first operational amplifier U1 output terminal and the first voltage comparator U4 positive terminal in integrating circuit, the reference voltage Vref that the anti-phase termination of the first voltage comparator U4 is set, the first voltage comparator U4 output termination inverse current output pulse ends, the 4th resistance R 4 is connected between the second operational amplifier U2 output terminal and second voltage comparer U5 positive terminal in integrating circuit, the reference voltage Vref that the anti-phase termination of second voltage comparer U5 is set, second voltage comparer U5 output termination forward current output pulse ends.
In the time being Hall element detection forward current, the first capacitor C 1 is charged, and due to the clamping action of the first diode D1, makes the first operational amplifier U1 output voltage can not be greater than all the time 0.5V left and right.And its through reverser U3 oppositely after, now the integrating circuit of the second resistance R 2, the second capacitor C 2 and the second operational amplifier U2 composition just can reverse integral, output voltage is for just, (the comparator reference voltage in this voltage and pulse generating circuit compares in the time being integrated to certain voltage, to export a discharge electricity amount pulse, produce corresponding pulse), this pulse is the closure of gauge tap on the one hand, the second capacitor C 2 is discharged, export on the other hand this pulse, so that to its counting, each pulse has represented that the specific quantity of electric charge flows through pick-up unit.In like manner, in the time that Hall element detects inverse current, be also like this.If forward current represents charging current, inverse current represents discharge current, and during by charging current, step-by-step counting adds 1, and when discharge current, step-by-step counting subtracts 1.So just, can detect the charging charge amount of accumulator and the number of discharge charge amount, and then the electric weight that can real-time monitoring goes out accumulator is how many.
Claims (4)
1. digital accumulator electric quantity monitoring device, it is characterized in that comprising Hall element, integrating circuit, integrating capacitor discharge circuit, pulse generating circuit sum counter, Hall element is connected with integrating circuit, integrating capacitor discharge circuit is connected with the electric capacity two ends in integrating circuit, pulse generating circuit is connected with the output terminal of integrating circuit, and pulse generating circuit is connected with counter.
2. monitoring device according to claim 1, it is characterized in that described integrating circuit comprises the first resistance, the second resistance, the first electric capacity, the second electric capacity, the first diode, the second diode, the first operational amplifier, the second operational amplifier and phase inverter, wherein the input end of first resistance one end and phase inverter is connected in Hall current sensor output terminal, the end of oppisite phase of another termination the first operational amplifier of the first resistance, the first electric capacity is connected the first operational amplifier end of oppisite phase with the first diode anode after the first diodes in parallel, the first diode cathode is connected in the first operational amplifier output terminal, phase inverter is connected the second operational amplifier end of oppisite phase with after the second resistance series connection, the second electric capacity is connected the second operational amplifier end of oppisite phase with the second diode anode after the second diodes in parallel, the second diode cathode is connected in the second operational amplifier output terminal.
3. monitoring device according to claim 2, it is characterized in that described integrating capacitor discharge circuit comprises the first analog switch, the second analog switch, wherein the first analog switch and the first Capacitance parallel connection, the control end of the first analog switch is connected with inverse current output pulse ends, the second analog switch and the first Capacitance parallel connection, the control end of the second analog switch is connected with forward current output pulse ends.
4. monitoring device according to claim 2, it is characterized in that described pulse generating circuit comprises the 3rd resistance, the 4th resistance, the first voltage comparator, second voltage comparer, the 3rd resistance is connected between the first operational amplifier output terminal and the first voltage comparator positive terminal in integrating circuit, the reference voltage that the anti-phase termination of the first voltage comparator is set, the first voltage comparator output termination inverse current output pulse ends, the 4th resistance is connected between the second operational amplifier output terminal and second voltage comparer positive terminal in integrating circuit, the reference voltage that the anti-phase termination of second voltage comparer is set, second voltage comparator output terminal connects forward current output pulse ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007765.3U CN203688781U (en) | 2014-01-06 | 2014-01-06 | Digital storage battery quantity monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007765.3U CN203688781U (en) | 2014-01-06 | 2014-01-06 | Digital storage battery quantity monitoring device |
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| CN203688781U true CN203688781U (en) | 2014-07-02 |
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| CN201420007765.3U Expired - Fee Related CN203688781U (en) | 2014-01-06 | 2014-01-06 | Digital storage battery quantity monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760491A (en) * | 2014-01-06 | 2014-04-30 | 华南理工大学 | Electric quantity monitoring method and device for digital storage battery |
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2014
- 2014-01-06 CN CN201420007765.3U patent/CN203688781U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760491A (en) * | 2014-01-06 | 2014-04-30 | 华南理工大学 | Electric quantity monitoring method and device for digital storage battery |
| CN103760491B (en) * | 2014-01-06 | 2017-04-05 | 华南理工大学 | Digital accumulator electric quantity monitoring method and device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20170106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |