CN103630846A - Method and system for monitoring residual capacity of storage battery on line based on internal resistance method - Google Patents
Method and system for monitoring residual capacity of storage battery on line based on internal resistance method Download PDFInfo
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Abstract
本发明公开了一种基于内阻法的蓄电池剩余电量在线监测方法及系统，其方法是首先将恒定交流电流稳压源连接到蓄电池的两端，然后通过峰值保持器采集蓄电池两端的交流电压峰值及流过蓄电池的交流电流峰值，并利用相位检测电路监测交流电压信号与交流电流信号之间的相位差，最后，把采集到的交流电流、电压峰值及其相位差输送到单片机进行数据处理，即可得到蓄电池的剩余电量，将测量所得到的蓄电池剩余电量值实时显示出来，便实现可视化的蓄电池剩余电量实时在线监测。在采用以上方案后，本发明实现了蓄电池剩余电量高精度、可视化、实时的智能在线监测。
The invention discloses a method and system for on-line monitoring of battery remaining power based on an internal resistance method. The method is to firstly connect a constant alternating current voltage stabilizing source to both ends of the battery, and then collect the peak value of the AC voltage at both ends of the battery through a peak value holder And the peak value of the AC current flowing through the battery, and use the phase detection circuit to monitor the phase difference between the AC voltage signal and the AC current signal. Finally, the collected AC current, voltage peak value and phase difference are sent to the single-chip microcomputer for data processing. The remaining power of the battery can be obtained, and the measured remaining power value of the battery can be displayed in real time, so that the visualized real-time online monitoring of the remaining power of the battery can be realized. After adopting the above solution, the present invention realizes high-precision, visualized and real-time intelligent on-line monitoring of the remaining power of the storage battery.
Description
Technical field
The present invention relates to the technical field of accumulator dump energy on-line monitoring, refer in particular to a kind of accumulator dump energy on-line monitoring method and system based on internal resistance method.
Background technology
At present, accumulator has been widely used in the industries such as commercial production, electric power, traffic and communication.Except directly powering to consumer, accumulator also often doubles as standby power supply, when the power supplies such as electrical network, solar electrical energy generation, wind power generation go wrong, timely and effective supplementing provides emergency power, ensure that consumer is stable, continue, effectively move, the energy storage situation of accumulator and reliability, the stability of whole electric power system are closely related.Therefore, realize the on-line monitoring of accumulator dump energy, for assurance equipment, power, guarantee that electric power system safe and reliable operation is significant.
Accumulator dump energy monitoring method is more, mainly contains densimetry, open-circuit voltage method, electric discharge, internal resistance method etc.Densimetry is usually used in the measurement of open type lead-acid accumulator dump energy, but for a large amount of sealed cells that use are inapplicable at present; And open-circuit voltage method and electric discharge can be for the off-line measurements of accumulator, but its measuring accuracy is lower and be not suitable for on-line monitoring; Internal resistance method is according to the correlativity between accumulator dump energy and its internal resistance value, indirectly obtains the dump energy of accumulator by the internal resistance value of real time on-line monitoring accumulator.Compare with above several measuring methods, internal resistance method has unique advantage, and its measuring accuracy is high, and is suitable for the on-line measurement of sealed cell dump energy, and while method is minimum on using electricity system impact.Nowadays, aspect the measurement of accumulator dump energy, doing large quantity research, but all having the shortcomings such as precision is low, reliability is low, so still needing improvement and bring new ideas aspect accumulator dump energy on-line monitoring.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of accumulator dump energy on-line monitoring method and system based on internal resistance method is provided, realize accumulator dump energy high precision, the monitoring of visual, real-time intelligent online.
For achieving the above object, its accumulator dump energy on-line monitoring method based on internal resistance method of technical scheme provided by the present invention is: the two ends that first constant ac current signal source are connected to accumulator, then by peak-holding circuit, gather the alternating voltage peak at accumulator two ends and flow through the alternating current peak value of accumulator, and utilize phase detecting circuit to monitor the phase differential between ac voltage signal and ac current signal, finally, the alternating current collecting, voltage peak and phase differential thereof are transported to single-chip microcomputer and carry out data processing, can obtain the dump energy of accumulator, the resulting accumulator residual electric quantity of measurement is shown in real time, just realize visual accumulator dump energy real time on-line monitoring.
Accumulator dump energy on-line monitoring method based on internal resistance method of the present invention, comprises the following steps:
1) accumulator is full of to electricity, then with the discharge rate of fixing, accumulator is discharged, the value of accumulator internal resistance and dump energy in real time record discharge process, when battery discharging complete, just can obtain the discharge curve that accumulator is complete, this curve is deposited in EEPROM;
2) constant ac current signal source is connected to the two ends of accumulator, for accumulator applies constant ac current signal, the alternating voltage amplitude U measuring afterwards at accumulator two ends
sand flow through the alternating current amplitude I of accumulator
s, then according to formula:
obtain the AC impedance Z of accumulator;
3) measure be applied to accumulator two ends AC signal with it the phase differential θ of the alternating voltage on accumulator between responding, according to the relation between the AC impedance of accumulator and its internal resistance:
Just can obtain the internal resistance value of accumulator, wherein θ is corresponding angle of impedance;
4) single-chip microcomputer, according to the accumulator internal resistance value recording, according to being stored in the battery discharging curve in EEPROM, just can obtain the dump energy of accumulator by tabling look-up;
5) the resulting accumulator residual electric quantity of measurement is shown on LCD liquid crystal display, realize visual accumulator dump energy real time on-line monitoring, meanwhile, if the accumulator dump energy that obtains of monitoring lower than set lower limit threshold values time, carry out sound and light alarm.
Described step 2) the alternating voltage amplitude U in
s, alternating current amplitude I
sto adopt peak-holding circuit collection, and the alternating voltage amplitude U after gathering
s, alternating current amplitude I
safter amplifying conditioning with described step 3) in phase differential θ send into multi-channel switch, and be converted to and send into single-chip microcomputer after corresponding digital signal and carry out computing by A/D converter, and then just obtain the internal resistance value of accumulator.
Accumulator dump energy on-line monitoring system based on internal resistance method of the present invention, comprise constant ac current signal source, for the ac voltage signal that keeps accumulator two ends constant the first peak-holding circuit within switching time, for the ac current signal that keeps flowing through accumulator constant the second peak-holding circuit within switching time, for monitoring the phase detecting module of ac voltage signal and the phase differential between ac current signal of accumulator, amplifying circuit module, multi-channel switch, A/D converter, single-chip microcomputer, for showing the display of accumulator residual electric quantity, wherein, described constant ac current signal source is connected to the two ends of accumulator, described the first peak-holding circuit, the second peak-holding circuit is connected with described accumulator respectively with phase detecting module, described the first peak-holding circuit and the second peak-holding circuit are through being connected multi-channel switch after corresponding amplifying circuit module separately, described phase detecting module connects described multi-channel switch, described multi-channel switch is connected with single-chip microcomputer after A/D converter, described single-chip microcomputer is connected with display.
Described single-chip microcomputer is connected with audible-visual annunciator, for accumulator dump energy lower than set lower limit threshold values time, carry out sound and light alarm.
Described the first peak-holding circuit and the second peak-holding circuit are PKD01 peak-holding circuit.
Described audible-visual annunciator includes hummer, light emitting diode, triode, and wherein, described hummer and light emitting diode are driven by corresponding triode separately respectively.
Described single-chip microcomputer is MSP430F149 single-chip microcomputer.
Described amplifying circuit module adopts OP07 amplifier.
Described display is LCD liquid crystal display.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, realize visual, the high-precision real time on-line monitoring of dump energy;
2, adopt peak-holding circuit, the ac current signal signal within switching time that has guaranteed the ac voltage signal amplitude at accumulator two ends and flow through accumulator remains unchanged, and conversion accuracy is guaranteed, and has reduced transformed error;
When 3, accumulator electric-quantity is too low, realize to report to the police, to remind staff in time accumulator to be charged, reliability, intelligent intensity are high.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is that simulating signal positive peak of the present invention detects schematic diagram.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
The accumulator dump energy on-line monitoring method based on internal resistance method described in the present embodiment, concrete condition is as follows:
1) accumulator is full of to electricity, then with the discharge rate of fixing, accumulator is discharged, the value of accumulator internal resistance and dump energy in real time record discharge process, when battery discharging complete, just can obtain the discharge curve that accumulator is complete, this curve be deposited in the EEPROM of MSP430F149 single-chip microcomputer;
2) constant ac current signal source is connected to the two ends of accumulator, for accumulator applies constant ac current signal, the alternating voltage amplitude U measuring afterwards at accumulator two ends
sand flow through the alternating current amplitude I of accumulator
s, then according to formula:
obtain the AC impedance Z of accumulator;
3) measure be applied to accumulator two ends AC signal with it the phase differential θ of the alternating voltage on accumulator between responding, according to the relation between the AC impedance of accumulator and its internal resistance:
Just can obtain the internal resistance value of accumulator, wherein θ is corresponding angle of impedance;
4) single-chip microcomputer, according to the accumulator internal resistance value recording, according to being stored in the battery discharging curve in EEPROM, just can obtain the dump energy of accumulator by tabling look-up;
5) the resulting accumulator residual electric quantity of measurement is shown on LCD liquid crystal display, realize visual accumulator dump energy real time on-line monitoring, meanwhile, if the accumulator dump energy that obtains of monitoring lower than set lower limit threshold values time, carry out sound and light alarm.
Wherein, the alternating voltage amplitude U described step 2)
s, alternating current amplitude I
sto utilize high response speed, high-precision PKD01 peak-holding circuit to gather, because alternating voltage, ac current signal are very faint, thus must amplify processing, therefore, the alternating voltage amplitude U after collection
s, alternating current amplitude I
safter amplifying conditioning just with described step 3) in phase differential θ send into multi-channel switch, and be converted to and send into single-chip microcomputer after corresponding digital signal and carry out computing by A/D converter, and then just calculate the internal resistance value of accumulator.When simulating signal is carried out A/D conversion, from starting, be transformed into EOC output digital quantity, need certain switching time, within this switching time, simulating signal need to remain unchanged substantially, otherwise just not assurance of conversion accuracy, particularly when frequency input signal is higher, tend to cause very large transformed error, and the present invention adopts high precision, high-speed peak value of response retainer PKD01 to overcome this difficulty.
Shown in Figure 1, for the present embodiment is realized the on-line monitoring system of above accumulator dump energy on-line monitoring method, it includes constant ac current signal source, for the ac voltage signal that keeps accumulator two ends constant the first peak-holding circuit (being specially PKD01 peak-holding circuit) within switching time, for the ac current signal that keeps flowing through accumulator constant the second peak-holding circuit (being specially PKD01 peak-holding circuit) within switching time, for monitoring the phase detecting module of ac voltage signal and the phase differential between ac current signal of accumulator, amplifying circuit module, multi-channel switch, A/D converter, MSP430F149 single-chip microcomputer (is selected super low-power consumption chip MSP430F149, can reduce the power consumption of monitoring system), for showing the display (being specially LCD liquid crystal display) of accumulator residual electric quantity, wherein, described constant ac current signal source is connected to the two ends of accumulator, described the first peak-holding circuit, the second peak-holding circuit is connected with described accumulator respectively with phase detecting module, described the first peak-holding circuit and the second peak-holding circuit are through being connected multi-channel switch after corresponding amplifying circuit module separately, described phase detecting module connects described multi-channel switch, described multi-channel switch is connected with MSP430F149 single-chip microcomputer after A/D converter, described MSP430F149 single-chip microcomputer is connected with display.
In addition, in order to guarantee the unlikely deep discharge of accumulator, MSP430F149 single-chip microcomputer described in the present embodiment is connected with audible-visual annunciator, when battery discharging is during to set lower limit threshold values, by audible-visual annunciator, report to the police, remind staff in time accumulator to be charged, this audible-visual annunciator be utilize that MSP430F149 Single-chip Controlling hummer is blown a whistle, red light emitting diodes flicker, consider the driving force of MSP430F149 chip I/O mouth, to hummer and lumination of light emitting diode, all adopt a triode to complete driving.
Shown in Figure 2, shown that simulating signal positive peak of the present invention detects principle, as we know from the figure, the amplifying circuit module described in the present embodiment adopts OP07 amplifier, the alternating voltage that PKD01 peak-holding circuit collects, the positive peak of alternating current, send into OP07 amplifier and amplify processing.
In sum, after adopting above scheme, the present invention can effectively realize the high precision of accumulator dump energy on-line monitoring and reliable, this compared to existing technology, reliability of the present invention and intelligent intensity are high, be applicable to the dump energy on-line monitoring of various battery types, realized degree of precision, visual Real-Time Monitoring, be worthy to be popularized.
The examples of implementation of the above are only the present invention's preferred embodiment, not with this, limit practical range of the present invention, therefore the variation that all shapes according to the present invention, principle are done all should be encompassed in protection scope of the present invention.
Claims (10)
1. the accumulator dump energy on-line monitoring method based on internal resistance method, it is characterized in that: the two ends that first constant ac current signal source are connected to accumulator, then by peak-holding circuit, gather the alternating voltage peak at accumulator two ends and flow through the alternating current peak value of accumulator, and utilize phase detecting circuit to monitor the phase differential between ac voltage signal and ac current signal, finally, the alternating current collecting, voltage peak and phase differential thereof are transported to single-chip microcomputer and carry out data processing, can obtain the dump energy of accumulator, the resulting accumulator residual electric quantity of measurement is shown in real time, just realize visual accumulator dump energy real time on-line monitoring.
2. a kind of accumulator dump energy on-line monitoring method based on internal resistance method according to claim 1, is characterized in that, comprises the following steps:
1) accumulator is full of to electricity, then with the discharge rate of fixing, accumulator is discharged, the value of accumulator internal resistance and dump energy in real time record discharge process, when battery discharging complete, just can obtain the discharge curve that accumulator is complete, this curve is deposited in EEPROM;
2) constant ac current signal source is connected to the two ends of accumulator, for accumulator applies constant ac current signal, the alternating voltage amplitude U measuring afterwards at accumulator two ends
sand flow through the alternating current amplitude I of accumulator
s, then according to formula:
obtain the AC impedance Z of accumulator;
3) measure be applied to accumulator two ends AC signal with it the phase differential θ of the alternating voltage on accumulator between responding, according to the relation between the AC impedance of accumulator and its internal resistance:
Just can obtain the internal resistance value of accumulator, wherein θ is corresponding angle of impedance;
4) single-chip microcomputer, according to the accumulator internal resistance value recording, according to being stored in the battery discharging curve in EEPROM, just can obtain the dump energy of accumulator by tabling look-up;
5) the resulting accumulator residual electric quantity of measurement is shown on LCD liquid crystal display, realize visual accumulator dump energy real time on-line monitoring, meanwhile, if the accumulator dump energy that obtains of monitoring lower than set lower limit threshold values time, carry out sound and light alarm.
3. a kind of accumulator dump energy on-line monitoring method based on internal resistance method according to claim 2, is characterized in that: the alternating voltage amplitude U described step 2)
s, alternating current amplitude I
sto adopt peak-holding circuit collection, and the alternating voltage amplitude U after gathering
s, alternating current amplitude I
safter amplifying conditioning with described step 3) in phase differential θ send into multi-channel switch, and be converted to and send into single-chip microcomputer after corresponding digital signal and carry out computing by A/D converter, and then just obtain the internal resistance value of accumulator.
4. a system that realizes the accumulator dump energy on-line monitoring method based on internal resistance method claimed in claim 1, it is characterized in that: comprise constant ac current signal source, for the ac voltage signal that keeps accumulator two ends constant the first peak-holding circuit within switching time, for the ac current signal that keeps flowing through accumulator constant the second peak-holding circuit within switching time, for monitoring the phase detecting module of ac voltage signal and the phase differential between ac current signal of accumulator, amplifying circuit module, multi-channel switch, A/D converter, single-chip microcomputer, for showing the display of accumulator residual electric quantity, wherein, described constant ac current signal source is connected to the two ends of accumulator, described the first peak-holding circuit, the second peak-holding circuit is connected with described accumulator respectively with phase detecting module, described the first peak-holding circuit and the second peak-holding circuit are through being connected multi-channel switch after corresponding amplifying circuit module separately, described phase detecting module connects described multi-channel switch, described multi-channel switch is connected with single-chip microcomputer after A/D converter, described single-chip microcomputer is connected with display.
5. a kind of accumulator dump energy on-line monitoring system based on internal resistance method according to claim 4, is characterized in that: described single-chip microcomputer is connected with audible-visual annunciator, for accumulator dump energy lower than set lower limit threshold values time, carry out sound and light alarm.
6. a kind of accumulator dump energy on-line monitoring system based on internal resistance method according to claim 4, is characterized in that: described the first peak-holding circuit and the second peak-holding circuit are PKD01 peak-holding circuit.
7. a kind of accumulator dump energy on-line monitoring system based on internal resistance method according to claim 5, it is characterized in that: described audible-visual annunciator includes hummer, light emitting diode, triode, wherein, described hummer and light emitting diode are driven by corresponding triode separately respectively.
8. a kind of accumulator dump energy on-line monitoring system based on internal resistance method according to claim 4, is characterized in that: described single-chip microcomputer is MSP430F149 single-chip microcomputer.
9. a kind of accumulator dump energy on-line monitoring system based on internal resistance method according to claim 4, is characterized in that: described amplifying circuit module adopts OP07 amplifier.
10. a kind of accumulator dump energy on-line monitoring system based on internal resistance method according to claim 4, is characterized in that: described display is LCD liquid crystal display.
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Cited By (4)
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| CN106527304A (en) * | 2017-01-09 | 2017-03-22 | 中国科学院长春光学精密机械与物理研究所 | Signal processing system and method for screening peak detector PH300 |
| CN112731177A (en) * | 2020-12-21 | 2021-04-30 | 深圳市凯迪仕智能科技有限公司 | Method and device for detecting electric quantity of dry battery |
| CN113508488A (en) * | 2019-02-28 | 2021-10-15 | 古河电气工业株式会社 | Rechargeable battery state detection device and rechargeable battery state detection method |
| CN114563723A (en) * | 2020-11-27 | 2022-05-31 | 比亚迪股份有限公司 | Battery voltage measuring method, device, medium, and vehicle |
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