CN103105585B - The full-time on-line testing method of a kind of accumulator property discharge and recharge - Google Patents
The full-time on-line testing method of a kind of accumulator property discharge and recharge Download PDFInfo
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- CN103105585B CN103105585B CN201110360163.7A CN201110360163A CN103105585B CN 103105585 B CN103105585 B CN 103105585B CN 201110360163 A CN201110360163 A CN 201110360163A CN 103105585 B CN103105585 B CN 103105585B
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Abstract
The invention discloses the full-time on-line testing method of a kind of accumulator property discharge and recharge, belong to battery technology field.The method has test fast and safely advantage accurately and reliably, and the accumulator itself that the capacity that overcomes is identical has a difficult problem for congenital discreteness.According to the relevance between the synchronism of battery tension curve and performance, by the real-time monitoring to charging and discharging full-time curve synchronism, before solving, method of testing damages the critical defect of accumulator capacity and cannot carry out the problem of fault analysis respectively to each battery.This method simple, intuitive, the synchronism of the full-time voltage curve of discharge and recharge monitors the degradation analysis going for various types of battery pack in real time, and equipment investment is little, and risk is little effective.
Description
Technical field
The present invention relates to battery technology field, particularly relate to the full-time on-line testing method of a kind of accumulator property discharge and recharge.
Background technology
Along with the development of backup power equipment, in the early 1990s, along with the growth of service time, there is a lot of new problem do not run in the past in the industrial storage battery used, such as battery case distortion, solution leakage, electrode corrosion, off-capacity, battery terminal voltage is uneven, inside battery binding post, the brace of homopolarity and the corrosion of electrode contact and the phenomenon ruptured also more often occur than open type battery, these faults all cause capacitance loss, but battery terminal voltage and life performance non-correlation, this makes applying unit not easily grasp permanance and the Problem of Failure of battery.
So the periodic detection of battery and electric battery and on-line monitoring are extremely important and necessary, it has been very important link in power system maintenance.The on-the-spot DC intelligent monitoring attending device that usually uses carries out on-line real-time measuremen to the voltage of the every block battery of electric battery and battery pack current, be responsible for carrying out floating charge, constant-current charge and constant-current discharge to electric battery, but not to the analysis arbitration functions of battery failures type.Because the difference for accumulator float charge voltage small magnitude does not have way difference and process, even if so DC intelligent monitoring attending device can carry out simple voltage detecting to accumulator, but fully can not react the problem of accumulator, early warning and perspective poor, cannot accurately and timely find out aging and fail battery.
Current battery performance test methods
Mainly contain three kinds of methods: off-line type discharge measuring method, online discharge measuring method, impedance method.
1, off-line type discharge measuring method:
First spun off from straight-flow system by a group storage battery, external fictitious load also returns straight-flow system after carrying out discharge test again, discharges after its charging recovers with same method to another Battery pack again.After disengaging one Battery pack, in system, reserce cell group reduces, and as commercial power interruption, cannot ensure that remaining power group can the power supply of independent support system.Should dismantle battery anode and negative pole, the accident if operation is probably short-circuited because of carelessness, is absolutely unsafe.After off-line electric discharge terminates, the voltage difference of a few volt is there is between electric battery, when system is returned in direct parallel connection, the dash current of a few kiloampere will be produced, not only can cause huge injury to electric battery, and huge spark can be produced, and danger is formed to operating personnel, even can by cell connector or rectifier fuse opening time serious.
2, online discharge measuring method:
The interchange of online for direct current charging device input is disconnected, by accumulator, physical device load is powered.The data such as voltage, discharge time, discharge current of each cell of survey record, release the 50-70% of rated capacity.Although what bear during battery power discharge is actual loading electric current, is be the size of uncontrollable electric battery foreign work electric current due to people, will artificially accelerates the shortening in electric battery serviceable life like this.When battery bear actual loading many close to 3 ~ 5 hour rate time, adopt such discharge test method danger high.If either shallow is discharged, because depth of discharge is limited, some falls behind cell and also will be difficult to be found.The method and off-line type discharge measuring method all by carrying out testing and analysis to the performance of whole battery pack, cannot carry out breakdown judge to single battery.
3. testing impedance method
The advantage of internal resistance method is that the accumulator concerning online use, the method is likely minimum to systematic influence, and can measure within the whole operating period of battery.During accumulator low-rate discharge, internal resistance is not remarkable on battery performance impact, and during high-multiplying power discharge, internal resistance on battery performance impact significantly, cannot go according to the internal resistance of single accumulator the actual performance predicting accumulator.
Summary of the invention
The technical problem to be solved in the present invention is the shortcoming overcoming classic method, propose the full-time on-line testing method of a kind of accumulator property discharge and recharge, be operated in identical discharging condition and (comprise electric current, temperature) under, difference between battery can fully reveal at discharge process, the change speed of the battery discharge output voltage synchronism of different degradation has difference, thus calculates the performance of electric battery.
In the past because the accumulator shallow discharge electric discharge degree of depth is limited, some fell behind cell and also will be difficult to be found, and its deterioration or backward degree can't come out cmpletely.If full deep discharge, damages the capacity of accumulator, because the internal chemical reaction of accumulator is not completely reversibility, so, be not suitable for carrying out the electric discharge of dark degree to lead-acid accumulator.
By the direct current on-line maintenance equipment at scene battery pack discharged online and charge, in the overall process of discharging and charge, synchronism monitoring is carried out to the terminal voltage curve of each cell of battery pack, finds out the battery of synchronism rapid deterioration, confirmed as fail battery.Because test is without the need to deep discharge, accumulator voltage curve Real-Time Monitoring can avoid the overdischarge of battery simultaneously, and electric discharge machine room can not have battery backup.
Carry out further voltage curve monitoring in charging process after battery discharge, accurately, risk factor is little in test, and express-analysis can go out the failure cause of behindhand battery.Battery failures reason is many-sided, wherein has the reason of the manufacturing process of accumulator, has the reason of storage battery chemical characteristic, and namely the load voltage of the accumulator that capacity is identical itself has discreteness.This method overcomes a difficult problem for the original discrete feature of accumulator, after discharging into charging test loop flow process from either shallow, just part or indivedual backward or deteriorated battery in electric battery can be judged more exactly, and the failure cause of fail battery can be analyzed, the maintenance of analysis result to fail battery can be used as an important reference.The full-time on-line testing method of a kind of accumulator property discharge and recharge mainly comprises the following steps:
(1) check that whether direct supply duty is normal, configure the size of calculated load discharge rate C simultaneously according to load size and accumulator, and calculate its theoretical maximum discharge time of T
full=1/C.
(2) tracing analysis instrument and DC intelligent are monitored attending device to be connected, test parameter is set.Interchange input DC intelligent being monitored attending device disconnects, and is powered, carry out discharge test by accumulator to physical device load.
(3) after accumulator proceeds to electric discharge by floating charge state, the Voltage Drop of each battery is observed by curve Real-Time Monitoring, if voltage synchronous occurs that larger fluctuation illustrates that electric battery has fail battery, the battery that synchronism is deteriorated is picked out by analyser, and carries out alarm.
(4) according to the T maximum discharge time of estimation before electric discharge
fullthe 30%-40% of accumulator capacity is released in accumulator testing electric discharge suggestion, and set that dump energy is minimum is not less than 45%, suitable test synchronism variable thresholding is set, if synchronism variable become greater to threshold value, stop discharge test at once and proceed to charging measurement, avoid battery over-discharge, and the electric discharge being defined as electric battery this moment completing the moment.If find in test process, accumulator synchronism variable becomes greatly but does not reach thresholding, then need to carry out registration confirmed to this, without the need to stopping test.Carrying out in discharge process, tracing analysis instrument has voltage curve real-time monitoring alarming and calculates socking out time function, and maintainer can leave test site in short-term, pays close attention to city's electricity condition and discharge test situation without the need to the moment.If as run into commercial power interruption in online discharge test process, the time-out alarm function discharge time of analyser is closed, the tracing analysis not affecting battery is without the need to stopping test, and interchange input DC intelligent being monitored attending device connects, and allows battery charge in time when city power recovery.
(5) interchange of online charging device input connects after terminating by electric discharge, recovers the DC charging of electric battery until be full of, and the synchronism of fail battery voltage curve in the process of electric discharge and charging can rapid deterioration.The analysis of the synchronism of voltage curve during by charging to battery, thus the residue fail battery finding out that discharge test do not find further.
(6), after charging terminates, the running status of accumulator is floating charge state, and when electric battery enters floating charge state, test process terminates.According to charging and discharging curve data, analyze the performance condition of accumulator, find out behindhand battery, calculate the active volume of whole base station storage batteries group.If battery synchronism variate-value does not arrive thresholding all the time in the test duration, battery is all qualified.
The synchronism variable algorithm of battery
One Battery pack magnitude of voltage is respectively U
1, U
2, U
3... U
m, be divided into n group (n≤m) by certain rule, wherein the intermediate value of each group is A
1, A
2, A
3... A
n, the weighted value H of each group
1, H
2, H
3... H
n, then the average of whole group storage battery voltage data
each battery voltage value U
isynchronism coefficient be expressed as
In sum, the full-time on-line testing method of a kind of accumulator property discharge and recharge of the present invention, tool has the following advantages: the method has test fast and safely advantage accurately and reliably, and the accumulator itself that the capacity that overcomes is identical has a difficult problem for congenital discreteness.According to the relevance between the synchronism of battery tension curve and performance, by the real-time monitoring to charging and discharging full-time curve synchronism, before solving, method of testing damages the critical defect of accumulator capacity and cannot carry out the problem of fault analysis respectively to each battery.This method simple, intuitive, the synchronism of the full-time voltage curve of discharge and recharge monitors the degradation analysis going for various types of battery pack in real time, and equipment investment is little, and risk is little effective.
Embodiment
1. check city's electricity condition, confirm civil power normal power supply, or contact with local power department in advance, with or without planned power failure.
2. check that whether direct supply duty is normal, configure the size of calculated load discharge rate C simultaneously according to load size and accumulator, and calculate its theoretical maximum discharge time of T
full=1/C.
3. comprehensive fastening battery post screw, to avoid producing fever phenomenon in heavy-current discharge process.
4. confirm more than errorless after, just can carry out electric discharge to accumulator.Tracing analysis instrument and DC intelligent are monitored attending device to be connected (again data importing tracing analysis instrument after also can testing), after confirming that equipment connection is correct, open tracing analysis instrument, according to battery pack nominal capacity, each test parameter is set.After confirming that optimum configurations is correct, interchange input DC intelligent being monitored attending device disconnects, and is powered, carry out discharge test by accumulator to physical device load.
5. after accumulator proceeds to electric discharge by floating charge state, we observe the Voltage Drop of each battery by curve Real-Time Monitoring, if voltage synchronous occurs that larger fluctuation illustrates that electric battery has fail battery, the battery that synchronism is deteriorated is picked out by analyser, and carries out alarm.
6. according to the T maximum discharge time of estimation before electric discharge
full, accumulator testing electric discharge is released 40% of accumulator capacity and (is namely set to 40%T discharge time
full), and to set battery over-discharge time warning value be 45%T
full, test synchronism variable thresholding 10 is set, if synchronism variable become greater to threshold value, stop discharge test at once and proceed to charging measurement, and the electric discharge being defined as electric battery this moment completes moment T
use.If find in test process, accumulator synchronism variable becomes greatly but does not reach thresholding, then need to carry out registration confirmed to this, without the need to stopping discharge test.Carrying out in discharge process, tracing analysis instrument has voltage curve real-time monitoring alarming and calculates socking out time function, and maintainer can leave test site in short-term, pays close attention to city's electricity condition and discharge test situation without the need to the moment.If as run into commercial power interruption in online discharge test process, the time-out alarm function discharge time of analyser is closed, the tracing analysis not affecting battery is without the need to stopping test, and interchange input DC intelligent being monitored attending device connects, and allows battery charge in time when city power recovery.Because electric battery now also can support about T
full/ 2 times, maintainer has the enough reaction time, avoids the risk causing device powers down because accumulator electric-quantity exhausts.
7. discharge after terminating and the interchange of online charging device input connected, recover the DC charging of battery pack until be full of, the synchronism of fail battery voltage curve in the process of discharging and charge can rapid deterioration (synchronism variable becomes large).The analysis of the synchronism of voltage curve during by charging to battery, thus the residue fail battery finding out that discharge test do not find further, thus fundamentally make up the defect of shallow discharge test in failure judgement battery accuracy.According to the double analysis of curve synchronism change in electric discharge and charging process, can judge most common failure type, field experiment accuracy is to reach more than 95%, and the maintenance of judged result to fail battery can be used as an important reference frame.
8., after charging terminates, the running status of accumulator is floating charge state, and when electric battery enters floating charge state, test process terminates.In test process, need measure one-shot battery linking bar contact temperature every half an hour with infrared thermometer, if find, contact temperature rise has exception, then should stop discharge test, ascertain the reason.According to charging and discharging curve data, analyze the performance condition of accumulator, find out behindhand battery, calculate the active volume of whole base station storage batteries group.The marked capacity of battery pack is C
fullif synchronism variable become greater to threshold value in discharge test, then now active volume C
useful=C
full× T
use/ T
full, fail battery battery is changed, active volume C after changing
useful=C
full; If synchronism variable does not become greater to threshold value in discharge test, then will observe the charging process curve of battery, in electric discharge and charging measurement, battery synchronism variate-value does not arrive thresholding all the time, and battery is all qualified, online active volume C
useful=C
full; If in charging process, battery synchronism variate-value arrives thresholding, is changed by fail battery battery, active volume C after changing
useful=C
full.
The above; be only the specific embodiment of the present invention, but the protection domain of invention is not limited thereto, any those of ordinary skill in the art are in the technical scope that the present invention discloses; the change that can expect easily or replacement, within the protection domain that all should be encompassed in invention.
Claims (4)
1. the full-time on-line testing method of accumulator property discharge and recharge, concrete steps are as follows:
(1) configure the size of calculated load discharge rate C according to load size and accumulator, and calculate T
full=1/C.
(2) tracing analysis instrument and DC intelligent are monitored attending device to be connected, arrange tracing analysis instrument parameter, the interchange input of the attending device of DC intelligent monitoring afterwards disconnects, and is powered, carry out discharge test by accumulator to physical device load.
(3) after accumulator proceeds to electric discharge by floating charge state, the Voltage Drop of each battery is observed by curve Real-Time Monitoring, if voltage synchronous occurs that larger fluctuation illustrates that electric battery has fail battery, the battery that synchronism is deteriorated is picked out by analyser, and carries out alarm.
(4) according to the T of estimation before electric discharge
full, suitable test synchronism variable thresholding is set, if synchronism variable become greater to threshold value, stop test at once, and the electric discharge being defined as electric battery this moment completes the moment.If find in test process, accumulator synchronism variable becomes greatly but does not reach thresholding, then need to carry out registration confirmed to this, without the need to stopping test.Carrying out in discharge process, tracing analysis instrument has voltage curve real-time monitoring alarming and calculates socking out time function.
(5) interchange of online charging device input connects after terminating by electric discharge, recovers the DC charging of battery pack until be full of, and the synchronism of fail battery voltage curve in the process of electric discharge and charging can rapid deterioration.The analysis of the synchronism of voltage curve during by charging to battery, thus the residue fail battery finding out that discharge test do not find further.
(6), after charging terminates, the running status of accumulator is floating charge state, and when electric battery enters floating charge state, test process terminates.According to charging and discharging curve data, analyze the performance condition of accumulator, find out behindhand battery, calculate the active volume of whole base station storage batteries group.If battery synchronism variate-value does not arrive thresholding all the time in the test duration, battery is all qualified.
2. the full-time on-line testing method of a kind of accumulator property discharge and recharge according to claim 1, is characterized in that: a Battery pack magnitude of voltage is respectively U
1, U
2, U
3... U
m, be divided into n group (n≤m) by certain rule, wherein the intermediate value of each group is A
1, A
2, A
3... A
n, the weighted value H of each group
1, H
2, H
3... H
n, then the average of whole group storage battery voltage data
each battery voltage value U
isynchronism coefficient be expressed as
3. the full-time on-line testing method of a kind of accumulator property discharge and recharge according to claim 1, is characterized in that: in described step 4, the 30%-40% of accumulator capacity is released in accumulator testing electric discharge, and sets that dump energy is minimum is not less than 45%.
4. the full-time on-line testing method of a kind of battery performance according to claim 1 discharge and recharge, it is characterized in that: if in described step 4 in online discharge test process as run into commercial power interruption, the time-out alarm function discharge time of analyser is closed, do not affect the tracing analysis of battery without the need to stopping test, interchange input DC intelligent being monitored attending device connects, and allows battery charge in time when city power recovery.
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Effective date of registration: 20230728 Address after: 222000 No. 418-1865, Comprehensive Building, Comprehensive Bonded Zone, Lianyungang Economic and Technological Development Zone, China (Jiangsu) Pilot Free Trade Zone, Lianyungang, Jiangsu Province Patentee after: Lianyungang Dingzhicai Energy Technology Co.,Ltd. Address before: 305 Zhaolong Building, No. 75 Tongguan South Road, Xinpu District, Lianyungang City, Jiangsu Province, 222000 Patentee before: Song Yang |