CN103424713B - Lead-acid power battery capacity method for group matching - Google Patents
Lead-acid power battery capacity method for group matching Download PDFInfo
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- CN103424713B CN103424713B CN201310371150.9A CN201310371150A CN103424713B CN 103424713 B CN103424713 B CN 103424713B CN 201310371150 A CN201310371150 A CN 201310371150A CN 103424713 B CN103424713 B CN 103424713B
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Abstract
The present invention relates to a kind of lead-acid power battery capacity method for group matching, by verifying measuring the data transmission obtained, carrying out rationality comparatively to Various types of data, if verify errorless, then classification is stored in database; If verification is not passed through, then require to check and revise data, ensure that the accurate property of data; The normal capacity of each battery is sorted according to decreasing fashion, according to required open-circuit voltage scope, range of tolerable variance, mate in minimum tolerance mode, ensure that combo rate maximizes, to reduce between electric battery capacity difference and then improve electric battery serviceable life.
Description
Technical field
The present invention relates to a kind of battery capacity method for group matching, particularly relate to a kind of lead-acid power battery capacity method for group matching.
Background technology
Lead-acid battery because of its low price, material source is abundant, specific power is high, technology and manufacturing process is more ripe, resource recovery is high etc. that composite factor is generally adopted by various countries' electric motor car and extensively studies, electric bicycle, battery-operated motor cycle enter into huge numbers of families, every annual value of production nearly 50,000,000,000, for ensureing the electric battery serviceable life that series connection uses, multiple batteries of electric battery must carry out capacity matching.
At present, when carrying out combo to battery, all adopt discharge off battery difference to replace measurement capacity difference to carry out combo, but, capacity difference combo is replaced with voltage difference, cannot solve because discharge current, discharge time and the actual capacity difference that causes of temperature difference are to cause producing combo deviation, thus affect the life-span of electric battery.
Summary of the invention
In order to solve, lead-acid battery combo rate is low in the present invention, the poor large problem of battery capacity, provides and a kind ofly effectively can promote combo rate, reduces capacity difference between electric battery and then improve the lead-acid power battery capacity method for group matching in electric battery serviceable life.
Technical scheme of the present invention is:
A kind of lead-acid power battery capacity method for group matching, comprises following steps:
Step 1: respectively each cell circuit is discharged, record the time that every primary Ioops starts to discharge, the time numerical value of record is accurate to second;
Step 2: measure and record the discharge current value I of each cell circuit, the current values of record is accurate to 0.001A;
Step 3: record time during each cell circuit discharge off, the time data of record is accurate to second, deducts the time starting to discharge with time during discharge off, be the time of each cell circuit electric discharge;
Step 4: when measuring each cell circuit discharge off, the environment temperature t residing for each battery, and loop voltage when measuring each cell circuit discharge off, i.e. battery terminal voltage;
Step 5: the battery of discharge off is full of electricity and after standing 12-24 hours, measures and record its terminal voltage, be i.e. battery open circuit voltage;
Step 6: the measurement data transmission obtained in step 1 ~ 5 is verified, if verify errorless, then classification is stored in database; If verification is not passed through, then require to check and revise data;
Step 7: discharge the terminal voltage foundation of each battery measured knee characteristic curve, calculates the time △ T being discharged to and should compensating when terminal voltage is standard termination voltage;
Step 8: according to normal capacity C25 and the open-circuit voltage of each battery, carry out combo; To the open-circuit voltage of each cell circuit, ask for standard deviation S, remove the Li Island data of battery capacity and open-circuit voltage, described Li Island data are the data exceeded between higher limit Ч+3*S and lower limit Ч-3*S scope, Li Island data do not participate in combo, and wherein Ч is the mean value of open-circuit voltage;
Step 9: sort according to decreasing fashion to the normal capacity C25 of each battery, according to required open-circuit voltage scope, range of tolerable variance, mates in minimum tolerance mode.
Discharge capacity of the cell value when described normal capacity C25 is standard temperature 25 degrees Celsius, its computing formula is: C25=Ct/1+K* (t-25), wherein K is battery capacity conversion coefficient at different temperatures, t is battery context temperature, the capability value of Ct actual environment temperature residing for battery, i.e. Ct=I* (T0+ △ T), wherein I is the discharge current value measuring loop, T0 is the discharge time of cell circuit, and △ T is the discharging compensation time calculated by electric discharge flex point curve.
Described electric discharge knee characteristic curve is at battery discharge termination phase, by electric discharge closed circuit voltage steadily to the voltage-time curve of the process that declines rapidly, the Y-axis of described electric discharge knee characteristic curve is final discharging voltage, X-axis is the make-up time, the intersection point of electric discharge knee characteristic curve and Y-axis is standard final discharging voltage, according to the final voltage of actual measurement, read the numerical value that on curve, X-axis is corresponding and be the discharging compensation time.
Useful good effect of the present invention is:
The present invention, by verifying measuring the data transmission obtained, carries out rationality comparatively to Various types of data, if verify errorless, then classification is stored in database; If verification is not passed through, then require to check and revise data, ensure that the accurate property of data; The normal capacity of each battery is sorted according to decreasing fashion, according to required open-circuit voltage scope, range of tolerable variance, mate in minimum tolerance mode, ensure that combo rate maximizes, to reduce between electric battery capacity difference and then improve electric battery serviceable life.
Accompanying drawing explanation
Fig. 1 is Structure and Process schematic block diagram of the present invention;
Fig. 2 is the experimental result comparison diagram of the present invention and prior art;
The battery power discharge knee characteristic curve synoptic diagram of Fig. 3 to be Fig. 3 be model one.
Embodiment
Shown in Figure 1, a kind of lead-acid power battery capacity method for group matching, comprises following steps:
Step 1: respectively each cell circuit is discharged, record the time that every primary Ioops starts to discharge, the time numerical value of record is accurate to second;
Step 2: measure and record the discharge current value I of each cell circuit, the current values of record is accurate to 0.001A;
Step 3: record time during each cell circuit discharge off, the time data of record is accurate to second, deducts the time starting to discharge with time during discharge off, be the time of each cell circuit electric discharge;
Step 4: when measuring each cell circuit discharge off, the environment temperature t residing for each battery, and loop voltage when measuring each cell circuit discharge off, i.e. battery terminal voltage;
Step 5: the battery of discharge off is full of electricity and after standing 12-24 hours, measures and record its terminal voltage, be i.e. battery open circuit voltage;
Step 6: the measurement data transmission obtained in step 1 ~ 5 is verified, if verify errorless, then classification is stored in database; If verification is not passed through, then require to check and revise data;
Step 7: discharge the terminal voltage foundation of each battery measured knee characteristic curve, calculates the time △ T being discharged to and should compensating when terminal voltage is standard termination voltage;
Step 8: according to normal capacity C25 and the open-circuit voltage of each battery, carry out combo; To the open-circuit voltage of each cell circuit, ask for standard deviation S, remove the Li Island data of battery capacity and open-circuit voltage, described Li Island data are the data exceeded between higher limit Ч+3*S and lower limit Ч-3*S scope, Li Island data do not participate in combo, and wherein Ч is the mean value of open-circuit voltage;
Step 9: sort according to decreasing fashion to the normal capacity C25 of each battery, according to required open-circuit voltage scope, range of tolerable variance, mates in minimum tolerance mode.
Discharge capacity of the cell value when described normal capacity C25 is standard temperature 25 degrees Celsius, its computing formula is: C25=Ct/1+K* (t-25), wherein K is battery capacity conversion coefficient at different temperatures, t is battery context temperature, the capability value of Ct actual environment temperature residing for battery, i.e. Ct=I* (T0+ △ T), wherein I is the discharge current value measuring loop, T0 is the discharge time of cell circuit, and △ T is the discharging compensation time calculated by electric discharge flex point curve.
Described electric discharge knee characteristic curve is at battery discharge termination phase, by electric discharge closed circuit voltage steadily to the voltage-time curve of the process that declines rapidly, the ordinate of described electric discharge knee characteristic curve is final discharging voltage, horizontal ordinate is the make-up time, the intersection point of electric discharge knee characteristic curve and ordinate is standard final discharging voltage, according to the final voltage of actual measurement, read the numerical value that on curve, horizontal ordinate is corresponding and be the discharging compensation time, Fig. 3 is the battery power discharge knee characteristic curve synoptic diagram of model one, in figure, the intersection value 10.5V of curve and ordinate is standard final discharging voltage, such as, when the final voltage of electric battery actual measurement is 11.0V, the abscissa value 300S of homologous thread is the discharging compensation time.
As shown in form one, the combo battery of the present invention to different model adopts the method for group matching of method of the present invention and prior art to carry out Experimental comparison respectively, and data show, the present invention is relative to prior art, and the combo enhancing rate of battery improves about 8%.
As shown in form two, when the present invention adopts the discharge off between the combo battery of method for group matching of the present invention and prior art method for group matching respectively to 50 groups of two profiles number, maximum voltage difference carries out measurement contrast; Data show, adopt the maximum voltage difference during discharge off of the electric battery of method for group matching of the present invention low, namely the Capacity uniformity of electric battery is relatively good, avoids the serviceable life affecting whole electric battery in electric battery because the capacity of Individual cells is little.
As shown in Figure 2, in figure, ordinate is discharge time, unit is minute, horizontal ordinate is the number of times of cycle charge-discharge, thus employing four electric battery of the inventive method and the combo effect of prior art are contrasted, contrast from figure, adopt method for group matching of the present invention obviously effective than the combo of prior art, the longer service life of electric battery, mean lifetime promotes about 25%.
Claims (3)
1. a lead-acid power battery capacity method for group matching, is characterized in that: comprise following steps:
Step 1: respectively each cell circuit is discharged, record the time that every primary Ioops starts to discharge, the time numerical value of record is accurate to second;
Step 2: measure and record the discharge current value (I) of each cell circuit, the current values of record is accurate to 0.001A;
Step 3: record time during each cell circuit discharge off, the time data of record is accurate to second, deducts the time starting to discharge with time during discharge off, be the time of each cell circuit electric discharge;
Step 4: when measuring each cell circuit discharge off, the environment temperature (t) residing for each battery, and loop voltage when measuring each cell circuit discharge off, i.e. battery terminal voltage;
Step 5: the battery of discharge off is full of electricity and after standing 12-24 hours, measures and record its terminal voltage, be i.e. battery open circuit voltage;
Step 6: the measurement data transmission obtained in step 1 ~ 5 is verified, if verify errorless, then classification is stored in database; If verification is not passed through, then require to check and revise data;
Step 7: discharge the terminal voltage foundation of each battery measured knee characteristic curve, calculates the time (△ T) being discharged to and should compensating when terminal voltage is standard termination voltage;
Step 8: the capability value (Ct) calculating battery, according to normal capacity (C25) and the open-circuit voltage of each battery, carries out combo; To the open-circuit voltage of each cell circuit, ask for standard deviation (S), remove the Li Island data of battery capacity and open-circuit voltage, described Li Island data are exceed the data between higher limit Ч+3*S and lower limit Ч-3*S scope, Li Island data do not participate in combo, and wherein Ч is the mean value of open-circuit voltage;
Step 9: the normal capacity (C25) of each battery is sorted according to decreasing fashion, according to required open-circuit voltage scope, range of tolerable variance, mates in minimum tolerance mode.
2. lead-acid power battery capacity method for group matching according to claim 1, it is characterized in that: described normal capacity (C25) is discharge capacity of the cell value during standard temperature 25 degrees Celsius, its computing formula is: C25=Ct/1+K* (t-25), wherein K is temperature conversion factor, t is battery context temperature, the capability value of Ct actual environment temperature residing for battery, i.e. Ct=I* (T0+ △ T), wherein I is the discharge current value measuring loop, T0 is the discharge time of cell circuit, and △ T is the discharging compensation time calculated by electric discharge flex point curve.
3. lead-acid power battery capacity method for group matching according to claim 1, it is characterized in that: described electric discharge knee characteristic curve is at battery discharge termination phase, by electric discharge closed circuit voltage steadily to the voltage-time curve of the process that declines rapidly, the Y-axis of described electric discharge knee characteristic curve is final discharging voltage, X-axis is the make-up time, the intersection point of electric discharge knee characteristic curve and Y-axis is standard final discharging voltage, according to the final voltage of actual measurement, read the numerical value that on curve, X-axis is corresponding and be the discharging compensation time.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9594121B2 (en) * | 2014-04-04 | 2017-03-14 | GM Global Technology Operations LLC | Systems and methods for estimating battery pack capacity |
| CN105319516A (en) * | 2015-11-24 | 2016-02-10 | 苏州新中能源科技有限公司 | A battery set-making and screening method |
| CN108508368A (en) * | 2018-03-20 | 2018-09-07 | 江苏金帆新程装备有限公司 | A kind of battery opens the test system of closed loop characteristic |
| CN109669143B (en) * | 2019-01-30 | 2021-01-29 | 中航锂电（洛阳）有限公司 | Battery pack capacity evaluation method |
| CN110376528B (en) * | 2019-07-25 | 2021-12-07 | 珠海银河智能电网有限公司 | On-line evaluation method and system for lead-acid storage battery pack and storage medium |
| CN111323723B (en) * | 2020-03-27 | 2022-05-13 | 惠州亿纬集能有限公司 | Method for improving lithium battery capacity tolerance judgment precision |
| CN113484756A (en) * | 2021-06-22 | 2021-10-08 | 广州杰赛科技股份有限公司 | Balanced discharge management method for storage battery pack |
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| JP4227814B2 (en) * | 2003-02-07 | 2009-02-18 | エスペック株式会社 | Battery state diagnosis apparatus and battery state diagnosis method |
| CN102456931B (en) * | 2011-09-05 | 2014-03-12 | 凹凸电子（武汉）有限公司 | Lead-acid battery matching method and system |
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| EP1814206A1 (en) * | 2006-01-27 | 2007-08-01 | Berner Fachhochschule Hochschule für Technik und Architektur Biel | Battery balancing apparatus |
| CN101924257A (en) * | 2010-07-29 | 2010-12-22 | 江苏双登集团有限公司 | Lead-acid cell grouping method |
| CN202066951U (en) * | 2011-05-13 | 2011-12-07 | 山东科技大学 | Discharge assembly instrument of storage battery |
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Effective date of registration: 20211223 Address after: 454550 Changfu Road West, Qinyang City, Jiaozuo City, Henan Province Patentee after: HENAN CHILWEE GENSHORE POWER Co.,Ltd. Address before: 454550 Qinnan Industrial Zone, Qinyang City, Jiaozuo City, Henan Province Patentee before: HENAN CHAOWEI POWER SUPPLY Co.,Ltd. |