CN102809728A - Method for evaluating life condition strength - Google Patents
Method for evaluating life condition strength Download PDFInfo
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- CN102809728A CN102809728A CN2011101466096A CN201110146609A CN102809728A CN 102809728 A CN102809728 A CN 102809728A CN 2011101466096 A CN2011101466096 A CN 2011101466096A CN 201110146609 A CN201110146609 A CN 201110146609A CN 102809728 A CN102809728 A CN 102809728A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000007619 statistical method Methods 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910018095 Ni-MH Inorganic materials 0.000 description 2
- 229910018477 Ni—MH Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a method for evaluating life condition strength. The method comprises the following step of: through calculating charging and discharging power of a battery in the whole life test circulating condition, obtaining the life condition strength of the battery by using the ratio of the charging and discharging power in the whole life test circulating condition. The method for evaluating the life condition strength, disclosed by the invention, comprises the following three parts: (1) determining the life test circulating condition of the battery; (2) sampling a current and a voltage in the battery charging and discharging process, so as to figure out the charging and discharging power of the battery; and (3) obtaining a using frequency histogram of the charging and discharging power of the battery by using a statistical method; and obtaining the life condition strength of the battery by using the ratio of the charging and discharging power in the histogram.
Description
Technical field
This patent belongs to the battery system field of new-energy automobile, relates in particular to a kind of battery life operating mode strength assessment method.
Background technology
Energy shortage and environmental pollution are the great difficult problems that the whole world faces, and making full use of clean energy resource is the effective way of alleviating this problem.Development energy-saving and environmental protection automobile has become the important directions of world car industrial technology innovation and the inevitable choice of automobile industry sustainable development.The battery system complexity is higher, design difficulty is big, is the bottleneck that this technology of restriction is applied to New-energy electric vehicle always.
The electrokinetic cell type that is applied at present on the new-energy automobile has: lead-acid accumulator, Ni-MH battery, nickel-cadmium battery and lithium battery.Lithium battery because have that volume is little, energy density is high, storage life is long, premium properties such as memory-less effect, high voltage and self-discharge rate are low, will replace lead-acid battery, Ni-MH battery, become the winner of electrokinetic cell.
Battery is the electro-chemical systems of a complicacy, and its deterioration failure mechanism is complicated, and deterioration mode receives many factor affecting, is difficult to reflect with general model.Issue for battery life is one of the most key problem of battery, the life-span not length be the principal element that restricts the electrokinetic cell widespread use at present.The research of battery life, very important to the development of battery industry.Therefore the variation that discharges and recharges power condition and battery life of battery has confidential relation, utilizes the power condition that discharges and recharges of battery the life-span operating mode intensity of battery is assessed to be seemed very meaningful.
In order simply to assess the life-span operating mode intensity of battery accurately, this patent just utilizes the power condition that discharges and recharges of battery to propose a kind of life-span operating mode strength assessment method.
In existing patent; Pair associated description of life-span operating mode strength assessment prediction was also once arranged; Like practical New Name is battery life evaluation device for hybrid vehicle (patent No. 200780005092); In this patent about the battery life evaluation part; Measured natural fuel mileage and the described test fuel mileage of certain driving model are compared, and the drop-out value of the fuel mileage of setting according to each degradation of battery is assessed the degradation of said battery, and the information of deterioration of battery is sent to the battery life display part.
And for example the patent of invention name is called the life determining method and the life determining apparatus (patent No. 200580005332) of nickel-hydrogen accumulator; This patent is prepared the data of the relation between the life-span that when discharge expression be applied to the value of the load electric power on the accumulator and environment temperature that said accumulator is set up the place and said accumulator in advance; Then; Load electric power and environment temperature when measuring battery discharging are selected the life-span corresponding with these measured values as the life expectancy value from said data.According to calculating the 1st life-span reduction amount as the natural logarithm function of parameter, the difference of said life expectancy value and said the 1st life-span reduction amount as remaining life value, is judged the life-span of nickel-hydrogen accumulator with discharge time.
Compare with existing patent, the described a kind of life-span operating mode strength assessment method of this patent is only through discharging and recharging power and just can predict battery life operating mode intensity in the whole life experiment state of cyclic operation of counting cell.And utilize the fuel mileage to estimate in the patent of above-mentioned battery life evaluation device for hybrid vehicle, obtain relatively trouble.In the life determining method of above-mentioned nickel-hydrogen accumulator and the patent of life determining apparatus, need prepare the data of the relation between life-span of environment temperature and battery in advance, the difficulty that these relation datas obtain is bigger, and the de-stabilising effect factor that receives is many.And this patent is through simply utilize discharging and recharging the power proportion and can assess battery life operating mode intensity in the whole durability test operating mode accurately.
Summary of the invention
The present invention is directed to existing research situation, provide a kind of, can assess battery life operating mode intensity easily through discharging and recharging power and drawing power frequency of utilization histogram in the whole durability test operating mode of counting cell with statistical method.
A kind of life-span operating mode strength assessment method that this patent proposes is made up of following three parts: 1, confirm battery life testing cycle operating mode; 2, electric current and the voltage of sampling in the battery charge and discharge process calculates the power that discharges and recharges of battery; 3, utilize statistical method to draw the frequency of utilization histogram of battery charging and discharging power, utilize the power proportion that discharges and recharges in the histogram to draw battery life operating mode intensity.
Described definite battery life testing cycle operating mode is after adjusting through actual applying working condition of battery and process of the test, objectively describes the life-span operating mode of battery, finally confirms suitable battery life testing cycle operating mode;
Electric current and voltage in the described sampling battery charge and discharge process; Calculate the power that discharges and recharges of battery; Be battery to be discharged and recharged through the durability test operating mode of confirming; According to sampling time T, gather electric current I and voltage U in the battery life process of the test, thereby calculate the power P=U*I that discharges and recharges of battery;
Describedly utilize the power proportion that discharges and recharges in the histogram to draw battery life operating mode intensity; Be to utilize statistical method to make histogram by the power data that discharges and recharges in the whole durability test operating mode that calculates; Horizontal ordinate is the interval size of power; Ordinate is the duration in this power bracket, utilizes in this frequency histogram the power proportion that discharges and recharges in the whole durability test operating mode of battery to judge battery life operating mode intensity.
Description of drawings
A kind of life-span operating mode strength assessment method overall flow figure that Fig. 1 proposes for this patent
Embodiment
A kind of life-span operating mode strength assessment method that the present invention proposes is made up of following three parts: 1, confirm battery life testing cycle operating mode; 2, electric current and the voltage of sampling in the battery charge and discharge process calculates the power that discharges and recharges of battery; 3, utilize statistical method to draw the frequency of utilization histogram of battery charging and discharging power, utilize the power proportion that discharges and recharges in the histogram to draw battery life operating mode intensity.
Below in conjunction with accompanying drawing a kind of life-span operating mode strength assessment method is described further.
Definite battery life testing cycle operating mode among Fig. 1 operating mode strength assessment of a kind of life-span method overall flow figure need be confirmed the battery life operating mode by the actual state that battery uses.Owing to the battery life data that the working cycle with conventional constant current charge-discharge obtains, be higher than the serviceable life of battery real work, and the working condition tests of pressing battery under the actual service conditions fully, the time that cost is long.Therefore the operating condition of test requirement should be input with the actual applying working condition of battery, combines process of the test adjustment again, finally confirms suitable battery life testing cycle operating mode;
The power that discharges and recharges that calculates battery among Fig. 1 operating mode strength assessment of a kind of life-span method overall flow figure; At first battery is discharged and recharged by the durability test operating mode of confirming; According to the sampling time T that confirms; Gather electric current I and voltage U in the battery life process of the test, thereby calculate the power P=U*I that discharges and recharges of battery;
The frequency histogram that utilizes among Fig. 1 operating mode strength assessment of a kind of life-span method overall flow figure carries out battery life operating mode strength assessment; Being meant by the power data that discharges and recharges in the whole durability test operating mode that calculates utilizes statistical method to make histogram; Horizontal ordinate is the interval size of power; Ordinate is the duration in this power bracket; Thereby can obtain the frequency of utilization histogram of battery charging and discharging power, utilize in this frequency histogram the power proportion that discharges and recharges in the whole durability test operating mode of battery to judge battery life operating mode intensity.
Claims (1)
1. life-span operating mode strength assessment method is characterized in that:
1. this method is through the power that discharges and recharges in the whole life experiment state of cyclic operation of counting cell; Draw the frequency of utilization of the power of battery by the battery charging and discharging power utilization statistical method of gained, utilize the life-span operating mode intensity that the power proportion is judged battery that discharges and recharges in the whole durability test operating mode.The step of said method is following:
2. the actual state of being used by battery is earlier confirmed battery life testing cycle operating mode; Operating condition of test requires to want the life-span operating mode of objective description battery; Should be input with the actual applying working condition of battery, combine process of the test adjustment again, finally confirm suitable battery life testing cycle operating mode;
3. by the durability test operating mode of confirming battery is discharged and recharged,, gather electric current I and voltage U in the battery life process of the test, calculate the power P=U*I that discharges and recharges of battery according to sampling time T;
4. utilize statistical method to make histogram by the power data that discharges and recharges in the whole durability test operating mode that calculates again; Horizontal ordinate is the interval size of power; Ordinate is the duration in this power bracket, thereby obtains the frequency of utilization histogram of battery charging and discharging power;
5. final, by the frequency of utilization histogram of battery charging and discharging power, utilize the power proportion that discharges and recharges in the whole durability test operating mode of battery to judge battery life operating mode intensity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110146609.6A CN102809728B (en) | 2011-06-01 | 2011-06-01 | A kind of life condition strength assessment method |
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| CN201110146609.6A CN102809728B (en) | 2011-06-01 | 2011-06-01 | A kind of life condition strength assessment method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616643A (en) * | 2013-11-15 | 2014-03-05 | 清华大学 | Data processing method for analyzing battery running conditions |
| CN110007234A (en) * | 2019-03-12 | 2019-07-12 | 清华大学 | Power battery/battery pack performance test methods and system, electric car |
| CN111044927A (en) * | 2019-12-25 | 2020-04-21 | 中国第一汽车股份有限公司 | Power battery service life evaluation method and system |
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| JP2004032977A (en) * | 2002-06-26 | 2004-01-29 | Hyundai Motor Co Ltd | Method of calculating maximum charging and discharging current values of hybrid electric vehicle battery |
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| KR20090032661A (en) * | 2007-09-28 | 2009-04-01 | 한국전력공사 | Automatic method for battery charging and discharging test of power equipment |
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2011
- 2011-06-01 CN CN201110146609.6A patent/CN102809728B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004032977A (en) * | 2002-06-26 | 2004-01-29 | Hyundai Motor Co Ltd | Method of calculating maximum charging and discharging current values of hybrid electric vehicle battery |
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| CN101398469A (en) * | 2008-09-28 | 2009-04-01 | 广州丰江电池新技术有限公司 | Method for assessing service life and security of lithium secondary battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616643A (en) * | 2013-11-15 | 2014-03-05 | 清华大学 | Data processing method for analyzing battery running conditions |
| CN103616643B (en) * | 2013-11-15 | 2016-02-10 | 清华大学 | Analyze the data processing method of battery operation operating mode |
| CN110007234A (en) * | 2019-03-12 | 2019-07-12 | 清华大学 | Power battery/battery pack performance test methods and system, electric car |
| CN110007234B (en) * | 2019-03-12 | 2020-02-07 | 清华大学 | Performance test method and system of power battery/battery pack and electric automobile |
| CN111044927A (en) * | 2019-12-25 | 2020-04-21 | 中国第一汽车股份有限公司 | Power battery service life evaluation method and system |
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| CN102809728B (en) | 2017-09-01 |
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Effective date of registration: 20170619 Address after: 400065 Institute of pattern recognition and application, School of automation, Chongqing University of Posts and Telecommunications, Chongwen Road, Nan'an District, Chongqing Applicant after: Park Changhao Applicant after: Duan Chongxi Applicant after: Ma Yiwei Applicant after: Wang Jin Address before: 400065 Institute of pattern recognition and application, School of automation, Chongqing University of Posts and Telecommunications, Chongwen Road, Nan'an District, Chongqing Applicant before: Park Changhao Applicant before: Duan Chongxi Applicant before: Wang Jin |
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Inventor after: Park Changhao Inventor after: Ma Yiwei Inventor after: Zhang Yan Inventor before: Park Changhao |
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