CN103424699A - Method for detecting capacity of storage battery - Google Patents
Method for detecting capacity of storage battery Download PDFInfo
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- CN103424699A CN103424699A CN2012101567443A CN201210156744A CN103424699A CN 103424699 A CN103424699 A CN 103424699A CN 2012101567443 A CN2012101567443 A CN 2012101567443A CN 201210156744 A CN201210156744 A CN 201210156744A CN 103424699 A CN103424699 A CN 103424699A
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Abstract
The invention relates to a method for detecting the capacity of a storage battery. The method includes the steps that when the storage battery is discharged, discharge currents and real-time discharge voltages of the storage battery are detected and acquired; the largest discharge duration of the storage battery is calculated according to the real-time discharge voltages and discharge moments; the actual battery capacity of the storage battery is calculated according to the largest discharge duration and the discharge currents; the performance of the storage battery is judged according to the actual battery capacity and the nominal capacity of the storage battery. According to the method for detecting the capacity of the storage battery, existing manual physical detection operation is replaced by informationization automatic analysis. The performance of the storage battery is accurately and efficiently detected in real time through analysis and automatic comparison of the real-time discharge situation of the storage battery. The service life of the storage battery can be effectively prolonged, the failure rate of the storage battery can be reduced, and then tedious procedures for detecting the performance of the storage battery (especially a large-scale storage battery pack) are technically shortened.
Description
Technical field
The present invention relates to a kind of detection method of accumulator capacity, relate in particular to a kind of detection method of accumulator capacity of high-precision high-reliability.
Background technology
In use, the performance of battery is bound to decay accumulator, how to judge or to learn that the accumulator current performance is a very important problem.
The method of existing judgement accumulator property mostly is physics or chemical method, as follows:
1, the judgement of the outward appearance by accumulator have undeformed, whether protrude, leakage, burn, break, blow, have oxide-free to ooze out etc.
2, by electromotive force and then the judgement battery performance of measuring accumulator with pot.
3, by with surveying instrument, being detected internal cell resistance, and then the performance of judgement accumulator.
Above-mentioned these existing methods have very important defect:
1, the method for testing performance of existing accumulator must need the maintainer to carry out physical detection, and not only labor cost is high, and exists because manually-operated difference causes the problems such as testing result is inaccurate;
2, can't realize real time implementation and normalization;
3, the larger environment for use for the accumulator number, the performance management of accumulator need to expend very large financial cost, and maintenance cost is high, and can not realize the Performance Detection and the maintenance management that become more meticulous.
Summary of the invention
The objective of the invention is the defect for prior art, a kind of detection method of accumulator capacity is provided, can be in real time and learn accurately the capacity of accumulator.
For achieving the above object, the invention provides a kind of detection method of accumulator capacity, described method comprises:
When battery discharging, detect and obtain discharge current and the real-time sparking voltage of described accumulator;
Calculate the maximum electric discharge duration of described accumulator by described real-time sparking voltage and discharging time;
Actual battery capacity according to described maximum electric discharge duration and discharge current calculating accumulator;
The performance that judges described accumulator according to actual battery capacity and the nominal capacity of described accumulator.
The detection method of accumulator capacity of the present invention detects operation by existing artificial physics and becomes information-based automatic analysis.By the analysis to the real-time discharge scenario of accumulator and automatically contrast, realize in real time, Battery Performance Testing accurately and efficiently.Effectively prolonging service life of battery, reduce the accumulator failure rate.Thereby shorten technically the loaded down with trivial details flow process of accumulator (especially extensive battery pack) Performance Detection.
The accompanying drawing explanation
The process flow diagram of the detection method that Fig. 1 is accumulator capacity of the present invention;
The voltage of the detection method that Fig. 2 is accumulator capacity of the present invention and moment funtcional relationship schematic diagram.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The detection method of accumulator capacity of the present invention detects operation by existing artificial physics and becomes information-based automatic analysis.By the analysis to the real-time discharge scenario of accumulator and automatically contrast, realize in real time, Battery Performance Testing accurately and efficiently.
The process flow diagram of the detection method that Fig. 1 is accumulator capacity of the present invention, as shown in the figure, the present invention specifically comprises the steps:
Detection to accumulator is real-time, by monitoring equipment, the parameters such as the real-time voltage of accumulator, real-time current is gathered, and can set poll detection time, for example from 10S to 10 minute, detects once;
Accumulator is being full of electricity, and during idle state, current value is almost nil, be that electric current is nearly 0 value, and the current settings of battery-operated while discharging is negative value, so be changed to negative value and keep certain hour by approaching 0 value when the electric current of accumulator, judge that in this time period, accumulator is to be discharge condition in work, show in power failure, by storage battery power supply;
And accumulator is when charged state, electric current be on the occasion of, when electric current by negative value be changed on the occasion of the time, meaning has a power failure finishes, accumulator is stopped power supply and is started charging, so if discharge current from negative value become on the occasion of, judge that described accumulator is in charged state.
So, according to the variation of the battery current detected, can determine T2, T3, the value of T4.
And obtaining of discharge current value is the real-time current value while by the time interval, detecting battery discharging, the mean value of all real-time current values, as the discharge current of accumulator, passes through formula
Calculate discharge current, I
DiBe to detect the real-time current value of accumulator by the time interval, n detects number of times, so the discharge current I of accumulator is exactly the mean value of all real-time current values.
At first need according to the magnitude of voltage of real-time sparking voltage and sparking voltage that discharging time calculates accumulator and the electric discharge function of discharging time, then according to electric discharge function and the accumulator minimum final voltage value of steadily discharging, obtain maximum electric discharge duration T.
Concrete, can be according to the magnitude of voltage of the data point of each detection and value constantly, utilize linear regression can calculate the straight line that approaches the change in voltage curve most, thus the duration while obtaining battery discharging to minimum final voltage, i.e. maximum electric discharge duration (T)
The voltage of the detection method that Fig. 2 is accumulator capacity of the present invention and moment funtcional relationship schematic diagram, in figure, solid line means the voltage drop curve, dotted line means the pre-index contour of voltage drop.The trend of voltage drop is as shown in the figure:
1, from moment T1 to T2, be that civil power is load supplying, so battery tension now is the maximum voltage U3 while being full of electricity.
2, T2 is a bit of time started from having a power failure to T3, the spread of voltage of accumulator now, have one and significantly descend from being full of to establish by cable while beginning power supply, after dropping to a certain degree, have again a slight lifting, voltage now is U2, and now is only the moment that accumulator starts steady electricity supply;
3, afterwards along with the power supply of accumulator to load, voltage can start steadily to descend slowly from U2, until T4 moment city power recovery, within this time period, the supply voltage of accumulator is all stable decline.
As shown in the figure, from Functional Analysis, T3 is linear with the time to the variation of interior voltage of T4 time period, and be monotone decreasing, this linear relationship is exactly a function expression U=a*T+b of time and voltage, and U is the storage battery power supply magnitude of voltage, T is constantly, a and b are constant term, according to the data point of taking in the time period to T4 at T3, just can use the algorithm of linear regression to calculate a and b.Use discrete collection point to calculate a and b, different programming language implementation method differences, but mathematical principle is all the same, can draw funtcional relationship.
When accumulator starts to discharge, voltage can first descend and then rise, and then slow decreasing, therefore be used in first point in linear regression calculating, must be the peak U2 that voltage rises to from U3 descends again, otherwise calculate inaccurate; So the sparking voltage that need to calculate accumulator according to magnitude of voltage and the discharging time of the real-time sparking voltage after the stable discharging of described accumulator and the electric discharge function of discharging time.
4, to have a minimum value be minimum final voltage U0 to the normal working voltage of accumulator, and lower than minimum value U0, then electric discharge will produce harmful effect to battery, thereby the mode of taking hydro power generation or closing load keeps voltage.And the general power failure overwhelming majority is can the duration so not long, calculate the actual capacity of battery, namely voltage drop is to the moment of U0, the electric weight that battery is emitted.So can, by learning the linear function U=a*T+b of coefficient a and b, utilize known U0 to calculate the moment T5 that accumulator reaches minimum.
From the initial discharge of accumulator T2 constantly, to accumulator maximum that the corresponding discharging time T5 of minimum final voltage this period the is accumulator duration that discharges that steadily discharges.Maximum electric discharge duration should be from the T3 of the corresponding moment of voltage stabilization decline curve peak institute to corresponding this section duration of T5 constantly of minimum final voltage U0 institute, and adds from starting the duration of discharging time T2 to voltage stabilization decline curve peak moment T3.So from the initial discharge of accumulator T2 constantly, to accumulator maximum that the corresponding discharging time T5 of minimum final voltage this period the is accumulator duration that discharges that steadily discharges.
The discharge current (I) of maximum electric discharge duration (T) and accumulator can calculate accumulator actual capacity Ca by formula Ca=I*T.
If the ratio of the actual battery capacity of accumulator and nominal capacity is less than the first judgment threshold, judge that described accumulator property is for poor, if the ratio of the actual battery capacity of described accumulator and nominal capacity is greater than the first judgment threshold and is less than the second judgment threshold, judge that described accumulator property is for general; If the ratio of the actual battery capacity of described accumulator and nominal capacity is greater than described the second judgment threshold, judge that described accumulator property is good.
Concrete, the ratio of the actual battery capacity C a of accumulator and nominal capacity Cn is set as to the intact degree of accumulator G, i.e. G=Ca/Cn; The first judgment threshold and the second judgment threshold can artificially be set, and for example the first judgment threshold is set as to 30%, and the second judgment threshold is set as to 70%, therefore can draw the following conclusions:
G≤30% accumulator property is poor
30%<G≤70% an accumulator performance is general
G>70% an accumulator performance is good.
The detection method of accumulator capacity of the present invention, from the electric current and voltage data that uninterruptedly collect, can judge which interior battery of time period in electric discharge, and then obtain electric current and the voltage data in discharge process, can obtain battery discharging electric current I and maximum electric discharge duration T by the analytical calculation to discharge data, utilize this to calculate the electric weight of emitting when battery reaches maximum electric discharge duration, i.e. actual capacity.Then by calculating the number percent of battery actual capacity and nominal capacity, judge the quality of battery performance.
The detection method of accumulator capacity of the present invention detects operation by existing artificial physics and becomes information-based automatic analysis.By the analysis to the real-time discharge scenario of accumulator and automatically contrast, realize in real time, Battery Performance Testing accurately and efficiently.Effectively prolonging service life of battery, reduce the accumulator failure rate.Thereby shorten technically the loaded down with trivial details flow process of Battery Performance Testing.Thereby exploit information condition detecting of storage-battery, can make real-time, the reliable technology platform of enterprise, optimize the battery management maintenance process, realize electronic O&M, make the performance of accumulator measurable, mensurable, can assess, can verify, make the management of accumulator there is conformability, extensibility, effectively reduce handling cost and the failure risk of accumulator (especially extensive battery pack).
The professional should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not exceed scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the detection method of an accumulator capacity, is characterized in that, described method comprises:
When battery discharging, detect and obtain discharge current and the real-time sparking voltage of described accumulator;
Calculate the maximum electric discharge duration of described accumulator by described real-time sparking voltage and discharging time;
Actual battery capacity according to described maximum electric discharge duration and discharge current calculating accumulator;
The performance that judges described accumulator according to actual battery capacity and the nominal capacity of described accumulator.
2. the detection method of accumulator capacity according to claim 1, it is characterized in that, describedly be specially when battery discharging, described battery discharging electric current is carried out to Real-Time Monitoring, if described discharge current becomes negative value from nearly null value, judge that described accumulator is in discharge condition.
3. the detection method of accumulator capacity according to claim 2, is characterized in that, described method also comprises, if described discharge current from negative value become on the occasion of, judge that described battery discharging finishes, in charged state.
4. the detection method of accumulator capacity according to claim 1, it is characterized in that, described detection and the discharge current that obtains described accumulator are specially, and detect the real-time current value of described accumulator by the time interval, and the mean value of all real-time current values is as the discharge current of described accumulator.
5. the detection method of accumulator capacity according to claim 1, is characterized in that, the described maximum electric discharge duration that calculates described accumulator by described real-time sparking voltage and discharging time is specially:
The sparking voltage that calculates accumulator according to magnitude of voltage and the discharging time of described real-time sparking voltage and the electric discharge function of discharging time;
Obtain described maximum electric discharge duration according to described electric discharge function and the accumulator minimum voltage value of steadily discharging.
6. the detection method of accumulator capacity according to claim 5, it is characterized in that, the described magnitude of voltage according to described real-time sparking voltage and discharging time calculate the sparking voltage of accumulator and the electric discharge function of discharging time is specially, the sparking voltage that calculates accumulator according to magnitude of voltage and the discharging time of the real-time sparking voltage after the stable discharging of described accumulator and the electric discharge function of discharging time.
7. the detection method of accumulator capacity according to claim 5, it is characterized in that, describedly according to described electric discharge function and the accumulator minimum voltage value of steadily discharging, obtain described maximum electric discharge duration and be specially, the initial discharge of described accumulator constantly, is the described maximum duration that discharges to the accumulator corresponding discharging time of minimum voltage that steadily discharges.
8. the detection method of accumulator capacity according to claim 1, it is characterized in that, the described actual battery capacity according to described maximum electric discharge duration and discharge current calculating accumulator is specially, the actual battery capacity for described accumulator that amasss of described maximum electric discharge duration and described discharge current value.
9. the detection method of accumulator capacity according to claim 1, it is characterized in that, the described capacity of the actual battery according to described accumulator and nominal capacity judge that the performance of described accumulator is specially, if the ratio of the actual battery capacity of described accumulator and nominal capacity is less than the first judgment threshold, judge that described accumulator property is for poor.
10. the detection method of accumulator capacity according to claim 1, it is characterized in that, described method also comprises, if the ratio of the actual battery capacity of described accumulator and nominal capacity is greater than the first judgment threshold and is less than the second judgment threshold, judges that described accumulator property is for general; If the ratio of the actual battery capacity of described accumulator and nominal capacity is greater than described the second judgment threshold, judge that described accumulator property is good.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242214A (en) * | 2015-10-26 | 2016-01-13 | 王立晖 | Storage battery capacity rapid detection method |
| CN107991622A (en) * | 2017-11-24 | 2018-05-04 | 武汉理工大学 | Life of storage battery detection alarm system and method in wind-solar-diesel storage mixed DC power supply |
| CN109189616A (en) * | 2018-07-26 | 2019-01-11 | 上海与德通讯技术有限公司 | A kind of discharge test method and terminal to be measured |
| CN110323819A (en) * | 2019-06-18 | 2019-10-11 | 浙江浩腾电子科技股份有限公司 | A kind of novel low-light volt solar street light |
| CN110618388A (en) * | 2019-09-04 | 2019-12-27 | 苏州浪潮智能科技有限公司 | Battery performance detection method and device |
| CN113341320A (en) * | 2021-03-17 | 2021-09-03 | 中国铁塔股份有限公司四川省分公司 | Method and system for calculating residual capacity of lead-acid storage battery |
| WO2022089301A1 (en) * | 2020-10-27 | 2022-05-05 | 圣邦微电子（北京）股份有限公司 | Battery protection chip-based polling detection circuit, method, and battery protection chip |
| CN114487885A (en) * | 2022-02-11 | 2022-05-13 | 国网河南省电力公司电力科学研究院 | Quality estimation method and screening method for storage batteries for transformer substation |
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| CN101101323A (en) * | 2007-07-23 | 2008-01-09 | 周汉文 | Lithium battery capacity quick detection method |
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Patent Citations (1)
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| CN101101323A (en) * | 2007-07-23 | 2008-01-09 | 周汉文 | Lithium battery capacity quick detection method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105242214A (en) * | 2015-10-26 | 2016-01-13 | 王立晖 | Storage battery capacity rapid detection method |
| CN107991622A (en) * | 2017-11-24 | 2018-05-04 | 武汉理工大学 | Life of storage battery detection alarm system and method in wind-solar-diesel storage mixed DC power supply |
| CN109189616A (en) * | 2018-07-26 | 2019-01-11 | 上海与德通讯技术有限公司 | A kind of discharge test method and terminal to be measured |
| CN110323819A (en) * | 2019-06-18 | 2019-10-11 | 浙江浩腾电子科技股份有限公司 | A kind of novel low-light volt solar street light |
| CN110618388A (en) * | 2019-09-04 | 2019-12-27 | 苏州浪潮智能科技有限公司 | Battery performance detection method and device |
| WO2022089301A1 (en) * | 2020-10-27 | 2022-05-05 | 圣邦微电子（北京）股份有限公司 | Battery protection chip-based polling detection circuit, method, and battery protection chip |
| CN113341320A (en) * | 2021-03-17 | 2021-09-03 | 中国铁塔股份有限公司四川省分公司 | Method and system for calculating residual capacity of lead-acid storage battery |
| CN113341320B (en) * | 2021-03-17 | 2022-08-30 | 中国铁塔股份有限公司四川省分公司 | Method and system for calculating residual capacity of lead-acid storage battery |
| CN114487885A (en) * | 2022-02-11 | 2022-05-13 | 国网河南省电力公司电力科学研究院 | Quality estimation method and screening method for storage batteries for transformer substation |
| CN114487885B (en) * | 2022-02-11 | 2024-01-19 | 国网河南省电力公司电力科学研究院 | Storage battery quality estimation method and screening method for transformer substation |
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