CN103105585A - Charge-discharge full-time online testing method for performance of storage battery - Google Patents
Charge-discharge full-time online testing method for performance of storage battery Download PDFInfo
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- CN103105585A CN103105585A CN2011103601637A CN201110360163A CN103105585A CN 103105585 A CN103105585 A CN 103105585A CN 2011103601637 A CN2011103601637 A CN 2011103601637A CN 201110360163 A CN201110360163 A CN 201110360163A CN 103105585 A CN103105585 A CN 103105585A
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Abstract
The invention discloses a charge-discharge full-time online testing method for a performance of a storage battery and belongs to the technical field of storage batteries. The charge-discharge full-time online testing method for the performance of the storage battery has the advantages of being rapid, safe, accurate and reliable in testing and capable of overcoming the defect that the storage battery with identical capacity has an own inherent discrete nature. According to the relevance between the synchronism and the performance of the voltage curve of the storage battery, by means of a real-time monitoring of the charge-discharge full-time curve synchronism, the problems that the existing testing method is harmful for the capacity of the storage battery and a fault analysis of each battery can not respectively carried out. The charge-discharge full-time online testing method for the performance of the storage battery has the advantages of being simple, intuitive, little in equipment investment, small in risk and good in effect. The monitoring of the synchronism of the charge-discharge full-time voltage curve in real time is applicable to the analysis of deterioration degree of various types of storage battery sets.
Description
Technical field
The present invention relates to the battery technology field, relate in particular to a kind of accumulator property and discharge and recharge full-time on-line testing method.
Background technology
development along with backup power equipment, in the early 1990s, growth along with service time, a lot of new problems that do not run into have in the past appearred in the industrial storage battery that uses, for example battery case distortion, solution leakage, electrode corrosion, off-capacity, battery terminal voltage is inhomogeneous etc., the inside battery binding post, the brace of homopolarity and the corrosion of electrode contact and the phenomenon that ruptures also ratio open formula battery more often occur, these faults all cause capacitance loss, but battery terminal voltage and life performance non-correlation, this makes applying unit be difficult for grasping permanance and the Problem of Failure of battery.
So the regular detection of battery and electric battery and on-line monitoring are very important and necessary, it has been very important link during power-supply system is safeguarded.The on-the-spot DC intelligent monitoring attending device that usually uses carries out detecting in real time online to voltage and the battery pack current of every battery of electric battery, be responsible for electric battery is carried out floating charge, constant-current charge and constant-current discharge, but not to the analysis arbitration functions of battery failures type.Because the difference for accumulator float charge voltage small magnitude does not have the way difference and processes, so even if DC intelligent monitoring attending device can carry out simple voltage detecting to accumulator, but can not fully react the problem of accumulator, early warning and perspective relatively poor can't accurately and timely be found out aging and fail battery.
The 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 a group storage battery is spun off from straight-flow system, external fictitious load is carried out also returning straight-flow system after discharge test again, with same method, another Battery pack is discharged after its charging recovers again.After being broken away from a Battery pack, in system, the reserce cell group reduces, as commercial power interruption, can't guarantee the remaining power group can independent support the power supply of system.Should dismantle battery anode and negative pole, the accident if operation probably is short-circuited because of carelessness is absolutely unsafe.After the off-line discharge finishes, there is the voltage difference of several volts between electric battery, when directly system is gone back in parallel connection, the dash current of several kiloamperes will be produced, not only can cause huge injury to electric battery, and can produce huge spark, and operating personnel are consisted of danger, even can be with cell connector or rectifier fuse opening when serious.
2, online discharge measuring method:
The interchange input of the online charging device of direct current is disconnected, by accumulator, the physical device load is powered.The data such as the voltage of each cell of survey record, discharge time, discharge current are emitted the 50-70% of rated capacity.Although what bear during battery power discharge is the actual loading electric current, be to be the size of uncontrollable electric battery foreign work electric current due to the people, will artificially accelerate the electric battery shortening in serviceable life like this.When battery is born actual loading and approached 3～5 hour rate more, adopt such discharge test method danger high.If shallow degree discharge, 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 the performance of whole battery pack is tested and analyzed, can't be carried out the fault judgement to single battery.
3. testing impedance method
The advantage of internal resistance method is concerning the accumulator of online use, and the method might be minimum to systematic influence, and can measure within the whole operating period of battery.During the discharge of accumulator low range, internal resistance is not remarkable on the battery performance impact, and during high-multiplying power discharge, internal resistance on the battery performance impact significantly can't go to predict according to the internal resistance of single accumulator the actual performance of accumulator.
Summary of the invention
The technical problem to be solved in the present invention is the shortcoming that has overcome classic method, propose a kind of accumulator property and discharged and recharged full-time on-line testing method, be operated in identical discharging condition and (comprise electric current, temperature) at, difference between battery can fully reveal at discharge process, the variation speed of the battery discharge output voltage synchronism of different degradations has difference, thereby calculates the performance of electric battery.
Because the accumulator shallow discharge electric discharge degree of depth is limited, some backward cell also will be difficult to be found in the past, and its deteriorated or backward degree can't come out cmpletely.If full deep discharge diminish the capacity of accumulator, because the inside chemical reaction of accumulator is not completely reversibility, so, be not suitable for lead-acid accumulator was carried out dark degree discharge.
Direct current on-line maintenance equipment by the scene discharges online and charges battery pack, in the overall process of discharge and charging, terminal voltage curve to each cell of battery pack carries out the synchronism monitoring, finds out the battery of the quick variation of synchronism, and it is confirmed as fail battery.Because test need not deep discharge, accumulator voltage curve Real-Time Monitoring can be avoided the overdischarge of battery simultaneously, and the discharge machine room can not have battery backup.
Carry out the monitoring of further voltage curve in charging process after battery discharge, test accurately, risk factor is little, and can express-analysis grows the failure cause of rear battery.The battery failures reason is many-sided, and the reason of the manufacturing process of accumulator is wherein arranged, and the reason of storage battery chemical characteristic is arranged, and the load voltage of the accumulator that namely capacity is identical itself has discreteness.This method has overcome the difficult problem of the original discrete feature of accumulator, after discharging into test loop flow process of charging from shallow degree, just can judge more exactly in electric battery and partly or individually fall behind or deteriorated battery, and can analyze the failure cause of fail battery, analysis result can be used as an important reference to the maintenance of fail battery.A kind of accumulator property discharges and recharges full-time on-line testing method and mainly comprises the following steps:
(1) check whether the direct supply duty is normal, configure the size of calculated load discharge rate C according to load size and accumulator simultaneously, and calculate its theoretical maximum T discharge time
Full=1/C.
(2) the tracing analysis instrument is connected with DC intelligent monitoring attending device, test parameter is set.The interchange input of DC intelligent being monitored attending device disconnects, and to the power supply of physical device load, carries out discharge test by accumulator.
(3) after accumulator changes discharge over to by floating charge state, the voltage of observing each battery by the curve Real-Time Monitoring falls, if larger fluctuation explanation electric battery appears in the voltage synchronism, fail battery is arranged, analyser is picked out the battery of synchronism variation, and carries out alarm.
(4) according to maximum discharge time of the T of estimation before discharge
FullThe 30%-40% of accumulator capacity is emitted in accumulator testing discharge suggestion, and set that dump energy is minimum is not less than 45%, suitable test synchronism variable thresholding is set, if the synchronism variable become greater to threshold value, stop at once discharge test and change charging measurement over to, having avoided battery over-discharge, and this discharge that constantly is defined as electric battery is completed constantly.If find that in test process accumulator synchronism variable becomes greatly but do not reach thresholding, need this to be carried out registration confirmed, need not to stop test.In carrying out discharge process, the tracing analysis instrument has the voltage curve real-time monitoring alarming and calculates the socking out time function, and the maintainer can leave test site in short-term, need not constantly to pay close attention to city's electricity condition and discharge test situation.If in online discharge test process as run into commercial power interruption, with the discharge time of analyser overtime alarm function close, the tracing analysis that does not affect battery need not to stop test, and the interchange input of DC intelligent being monitored attending device connects, and allows battery in time charge when the city power recovery.
(5) the interchange input with online charging device after discharge finishes connects, and recovers the DC charging of electric battery until be full of, and the synchronism of fail battery voltage curve in the process of discharge and charging can quick variation.The analysis of the synchronism of voltage curve when battery is charged does not have thereby further find out discharge test the residue fail battery found.
(6) after charging finished, the running status of accumulator was floating charge state, and test process finishes when electric battery enters floating charge state.According to the 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, (n≤m), wherein the intermediate value of each group is A to be divided into the n group by certain rule
1, A
2, A
3... A
n, the weighted value H of each group
1, H
2, H
3... H
n, the average of whole group storage battery voltage data
Each battery voltage value U
iThe synchronism coefficient table be shown
In sum, a kind of accumulator property of the present invention discharges and recharges full-time on-line testing method, has following advantage: the method has fast and safely advantage accurately and reliably of test, has overcome the difficult problem that the identical accumulator of capacity itself has congenital discreteness.According to the synchronism of battery tension curve and the relevance between performance, by the Real Time Monitoring to the full-time curve synchronism of charging and discharging, solved former method of testing and diminished the critical defect of accumulator capacity and can't carry out respectively the problem of fault analysis to each battery.This method simple, intuitive, the synchronism Real Time Monitoring that discharges and recharges full-time voltage curve goes for the degradation analysis of various types of battery pack, and equipment investment is little, and risk is little effective.
Embodiment
1. check city's electricity condition, confirm the civil power normal power supply, or contact with local power department in advance, have or not planned power failure.
2. check whether the direct supply duty is normal, configure the size of calculated load discharge rate C according to load size and accumulator simultaneously, and calculate its theoretical maximum T discharge time
Full=1/C.
3. comprehensive fastening battery post screw is to avoid producing fever phenomenon in the heavy-current discharge process.
Above confirmation errorless after, just can carry out electric discharge to accumulator.Tracing analysis instrument and DC intelligent monitoring attending device is connected (after also can testing again data importing tracing analysis instrument), after confirming that equipment connection is correct, unlatching tracing analysis instrument according to the battery pack nominal capacity, arranges each test parameter.After confirming that parameter arranges correctly, the interchange input of DC intelligent being monitored attending device disconnects, and to the power supply of physical device load, carries out discharge test by accumulator.
5. after accumulator changes discharge over to by floating charge state, the voltage that we observe each battery by the curve Real-Time Monitoring falls, if larger fluctuation explanation electric battery appears in the voltage synchronism, fail battery is arranged, analyser is picked out the battery of synchronism variation, and carries out alarm.
6. according to maximum discharge time of the T of estimation before discharge
Full, it (is to be made as 40%T discharge time that accumulator testing is emitted 40% of accumulator capacity
Full), and setting battery over-discharge time warning value is 45%T
Full, test synchronism variable thresholding 10 is set, if the synchronism variable become greater to threshold value, stop at once discharge test and change charging measurement over to, and T is constantly completed in this discharge that constantly is defined as electric battery
useIf find that in test process accumulator synchronism variable becomes greatly but do not reach thresholding, need this to be carried out registration confirmed, need not to stop discharge test.In carrying out discharge process, the tracing analysis instrument has the voltage curve real-time monitoring alarming and calculates the socking out time function, and the maintainer can leave test site in short-term, need not constantly to pay close attention to city's electricity condition and discharge test situation.If in online discharge test process as run into commercial power interruption, with the discharge time of analyser overtime alarm function close, the tracing analysis that does not affect battery need not to stop test, and the interchange input of DC intelligent being monitored attending device connects, and allows battery in time charge when the city power recovery.Because electric battery also can support about T at this moment
Full/ 2 times, the maintainer has the enough reaction time, has avoided exhausting because of accumulator electric-quantity the risk that causes device powers down.
7. the interchange input with online charging device after discharge finishes connects, and recovers the DC charging of battery pack until be full of, and the synchronism of fail battery voltage curve in the process of discharge and charging can quick variation (it is large that the synchronism variable becomes).The analysis of the synchronism of voltage curve when battery is charged does not have thereby further find out discharge test the residue fail battery found, thereby fundamentally makes up the defective of shallow discharge test on failure judgement battery accuracy.According to the double analysis that curve synchronism in discharge and charging process changes, can judge the most common failure type, the field experiment accuracy is to reach more than 95%, and judged result can be used as an important reference frame to the maintenance of fail battery.
8. after charging finished, the running status of accumulator was floating charge state, and test process finishes when electric battery enters floating charge state.In test process, need to measure one-shot battery linking bar contact temperature with infrared thermometer every half an hour, if find that the contact temperature rise has extremely, should stop discharge test, ascertain the reason.According to the 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 in discharge test, the synchronism variable become greater to threshold value, this moment active volume C
Useful=C
Full* T
use/ T
Full, the fail battery battery is changed active volume C after changing
Useful=C
FullIf in discharge test, the synchronism variable does not become greater to threshold value, will observe the charging process curve of battery, battery synchronism variate-value does not arrive thresholding all the time in discharge and charging measurement, and battery is all qualified, online active volume C
Useful=C
FullIf in charging process, battery synchronism variate-value arrives thresholding, and the fail battery battery is changed, 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 to this, any those of ordinary skill in the art are in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in the protection domain of invention.
Claims (4)
1. an accumulator property discharges and recharges full-time on-line testing method, and 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) the tracing analysis instrument is connected with DC intelligent monitoring attending device, the tracing analysis instrument parameter is set, the interchange input of the attending device of DC intelligent monitoring afterwards disconnects, and to the power supply of physical device load, carries out discharge test by accumulator.
(3) after accumulator changes discharge over to by floating charge state, the voltage of observing each battery by the curve Real-Time Monitoring falls, if larger fluctuation explanation electric battery appears in the voltage synchronism, fail battery is arranged, analyser is picked out the battery of synchronism variation, and carries out alarm.
(4) according to the T that estimates before discharge
Full, suitable test synchronism variable thresholding is set, if the synchronism variable become greater to threshold value, stop at once test, and this discharge that constantly is defined as electric battery is completed constantly.If find that in test process accumulator synchronism variable becomes greatly but do not reach thresholding, need this to be carried out registration confirmed, need not to stop test.In carrying out discharge process, the tracing analysis instrument has the voltage curve real-time monitoring alarming and calculates the socking out time function.
(5) the interchange input with online charging device after discharge finishes connects, and recovers the DC charging of battery pack until be full of, and the synchronism of fail battery voltage curve in the process of discharge and charging can quick variation.The analysis of the synchronism of voltage curve when battery is charged does not have thereby further find out discharge test the residue fail battery found.
(6) after charging finished, the running status of accumulator was floating charge state, and test process finishes when electric battery enters floating charge state.According to the 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. a kind of accumulator property according to claim 1 discharges and recharges full-time on-line testing method, it is characterized in that: a Battery pack magnitude of voltage is respectively U
1, U
2, U
3... U
m, (n≤m), wherein the intermediate value of each group is A to be divided into the n group by certain rule
1, A
2, A
3... A
n, the weighted value H of each group
1, H
2, H
3... H
n, the average of whole group storage battery voltage data
Each battery voltage value U
iThe synchronism coefficient table be shown
3. a kind of accumulator property according to claim 1 discharges and recharges full-time on-line testing method, it is characterized in that: in described step 4, accumulator testing is emitted the 30%-40% of accumulator capacity, and sets that dump energy is minimum is not less than 45%.
4. a kind of battery performance according to claim 1 discharges and recharges full-time on-line testing method, it is characterized in that: if in described step 4 in online discharge test process as run into commercial power interruption, with the discharge time of analyser overtime alarm function close, the tracing analysis that does not affect battery need not to stop test, the interchange input of DC intelligent being monitored attending device connects, and allows battery in time charge when the city power recovery.
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| CN112946500A (en) * | 2019-12-11 | 2021-06-11 | 珠海冠宇电池股份有限公司 | Method for rapidly testing cycle life of lithium ion battery |
| CN112946500B (en) * | 2019-12-11 | 2023-09-15 | 珠海冠宇电池股份有限公司 | Method for rapidly testing cycle life of lithium ion battery |
| CN112180261A (en) * | 2020-09-16 | 2021-01-05 | 合肥国轩高科动力能源有限公司 | Lithium analysis detection method for lithium iron phosphate power battery |
| CN112180261B (en) * | 2020-09-16 | 2022-04-12 | 合肥国轩高科动力能源有限公司 | Lithium analysis detection method for lithium iron phosphate power battery |
| CN115825763A (en) * | 2023-01-10 | 2023-03-21 | 伟杰科技（苏州）有限公司 | Intelligent battery monitoring system and monitoring method thereof |
| CN115825763B (en) * | 2023-01-10 | 2023-10-27 | 伟杰科技（苏州）有限公司 | Intelligent battery monitoring system and monitoring method thereof |
| CN117706385A (en) * | 2024-02-05 | 2024-03-15 | 宁德时代新能源科技股份有限公司 | Circulation test method and battery test system |
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