CN104698389A - Detection method of lithium battery energy efficiency - Google Patents
Detection method of lithium battery energy efficiency Download PDFInfo
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- CN104698389A CN104698389A CN201510112562.XA CN201510112562A CN104698389A CN 104698389 A CN104698389 A CN 104698389A CN 201510112562 A CN201510112562 A CN 201510112562A CN 104698389 A CN104698389 A CN 104698389A
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Abstract
The invention relates to a detection method of lithium battery energy efficiency. The detection method of the lithium battery energy efficiency includes following steps: placing a battery to be measured within a preset environment temperature for a preset time; discharging the battery to be measured until no power is stored in the battery to be measured; using a preset constant current to charge the battery to be measured, and recording charge energy charged into the battery to be measured when the battery to be measured is fully charged; using the preset constant current to discharge the battery to be measured, and recording discharge energy discharged from the battery to be measured when no power is stored in the battery to be measured; performing calculation according to the discharge energy and the charge energy, and obtaining the energy efficiency of the battery to be measured under the preset constant current. The detection method of the lithium battery energy efficiency can judge the energy efficiency of the battery under different work environments through efficiency lists under different temperature, searches out work environment parameters when the energy efficiency is optimal, and simultaneously can achieve an accurate prediction for residual energy of the battery under different work conditions. The detection method of the lithium battery energy efficiency is simple and easy to implement, and accurate in result, and can be popularized and used.
Description
Technical field
The present invention relates to technical field of lithium battery detection, particularly a kind of detection method of lithium battery energy efficiency.
Background technology
The progress of lithium ion battery technology facilitates applying of electric automobile.The ratio of the energy efficiency of battery and discharge energy and rechargeable energy, in charging process, electric energy converts chemical energy to, in discharge process, chemical energy is electric energy, and in twice conversion process, the constrained input of electric energy exists certain efficiency, and this efficiency directly reflects the quality of battery performance.Can be judged the performance of battery by the energy efficiency of battery, from energy conservation, the electric energy main transition of loss becomes heat energy, and thus energy efficiency can analyze the heat that battery produces in the course of the work, and then can analyze the relation of internal resistance and heat.And known energy efficiency can predict the number of battery remaining power, manages the reasonable employment of battery.
The internal factor affecting energy content of battery efficiency mainly contains the material of battery, internal resistance etc., and external factor has environment temperature, charging and discharging currents.Current energy efficiency detection method only focuses on the energy efficiency of battery under a certain specific work environments, and the method can not reflect the impact of external factor on energy content of battery efficiency comprehensively.Under research different temperatures, different charging and discharging currents, the energy efficiency of battery is conducive to the optimum working parameter finding out battery, thus formulate corresponding strategy when reality uses according to battery working characteristic, improve the capacity usage ratio of battery, the dump energy of battery can be predicted simultaneously more accurately.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of detection method that can judge the lithium battery energy efficiency of lithium battery energy efficiency at different ambient temperatures.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of detection method of lithium battery energy efficiency, comprises the following steps:
Step 1: mesuring battary is placed in default environment temperature, shelves Preset Time;
Step 2: discharged by mesuring battary, until without the electricity stored in mesuring battary;
Step 3: mesuring battary is charged for mesuring battary with the steady current preset, when mesuring battary is full of electricity, the rechargeable energy that record mesuring battary is filled with;
Step 4: mesuring battary is discharged with the steady current preset, when the electricity that nothing in mesuring battary stores, the discharge energy that record mesuring battary is released;
Step 5: calculate according to discharge energy and rechargeable energy, obtains the energy efficiency of mesuring battary under the steady current preset.
The invention has the beneficial effects as follows: contemplated by the invention environment temperature and charging and discharging currents to the impact of energy content of battery efficiency, by the efficiency table under the different temperatures that obtains, the energy efficiency of battery under different operating environment can be judged, find out the working environment parameter of energy efficiency optimum, utilize this table can realize the Accurate Prediction of battery dump energy under different operating mode simultaneously.
On the basis of technique scheme, the present invention can also do following improvement.
Further, also comprise step 5: change the steady current preset, repeat step 2 to 5, obtain the energy efficiency under different steady current.
Further, also step 6 is comprised: under being based upon default environment temperature, under different steady current, mesuring battary carries out the energy efficiency table of discharge and recharge.
Further, also comprise step 7: change the environment temperature preset, obtain the energy efficiency table under each environment temperature.
Further, the environment temperature preset in described step 1 is-20 DEG C ~ 60 DEG C.
Further, the environment temperature preset is-10 DEG C, 0 DEG C, 10 DEG C, 20 DEG C, 30 DEG C, 40 DEG C or 50 DEG C.
Further, the Preset Time in described step 1 is 8 ~ 24 hours.
Further, the steady current preset in described step 2 is 0.1C ~ 5C.
Further, described default steady current is 0.1C, 0.3C, 0.5C, 0.8C, 1C, 2C, 3C, 4C or 5C.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
A detection method for lithium battery energy efficiency, comprises the following steps:
Step 1: mesuring battary is placed in default environment temperature, shelves Preset Time;
Step 2: discharged by mesuring battary, until without the electricity stored in mesuring battary;
Step 3: mesuring battary is charged for mesuring battary with the steady current preset, when mesuring battary is full of electricity, the rechargeable energy that record mesuring battary is filled with;
Step 4: mesuring battary is discharged with the steady current preset, when the electricity that nothing in mesuring battary stores, the discharge energy that record mesuring battary is released;
Step 5: calculate according to discharge energy and rechargeable energy, obtains the energy efficiency of mesuring battary under the steady current preset.
Contemplated by the invention environment temperature and charging and discharging currents to the impact of energy content of battery efficiency, by the efficiency table under the different temperatures that obtains, the energy efficiency of battery under different operating environment can be judged, find out the working environment parameter of energy efficiency optimum, utilize this table can realize the Accurate Prediction of battery dump energy under different operating mode simultaneously.
Also comprise step 5: change the steady current preset, repeat step 2 to 5, obtain the energy efficiency under different steady current.Also comprise step 6: under being based upon default environment temperature, under different steady current, mesuring battary carries out the energy efficiency table of discharge and recharge.Also comprise step 7: change the environment temperature preset, obtain the energy efficiency table under each environment temperature.
The environment temperature preset in described step 1 is-20 DEG C or-10 DEG C, and the Preset Time in described step 1 is 8 hours, and the steady current preset in described step 2 is 0.1C or 0.3C.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1, and the environment temperature preset in described step 1 is 0 DEG C or 10 DEG C, and the Preset Time in described step 1 is 12 hours, and the steady current preset in described step 2 is 0.5C or 0.8C.
Embodiment 3
Embodiment 3 is with the difference of embodiment 1 and 2, and the environment temperature preset in described step 1 is 20 DEG C or 30 DEG C, and the Preset Time in described step 1 is 16 hours, and the steady current preset in described step 2 is 1C or 2C.
Embodiment 4
Embodiment 4 is with the difference of embodiment 1,2 and 3, and the environment temperature preset in described step 1 is 40 DEG C or 50 DEG C, and the Preset Time in described step 1 is 20 hours, and the steady current preset in described step 2 is 3C, 4C.
Embodiment 5
Embodiment 5 is with the difference of embodiment 1,2,3 and 4, and the environment temperature preset in described step 1 is 60 DEG C, and the Preset Time in described step 1 is 24 hours, and the steady current preset in described step 2 is 5C.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a detection method for lithium battery energy efficiency, is characterized in that, comprises the following steps:
Step 1: mesuring battary is placed in default environment temperature, shelves Preset Time;
Step 2: discharged by mesuring battary, until without the electricity stored in mesuring battary;
Step 3: mesuring battary is charged for mesuring battary with the steady current preset, when mesuring battary is full of electricity, the rechargeable energy that record mesuring battary is filled with;
Step 4: mesuring battary is discharged with the steady current preset, when the electricity that nothing in mesuring battary stores, the discharge energy that record mesuring battary is released;
Step 5: calculate according to discharge energy and rechargeable energy, obtains the energy efficiency of mesuring battary under the steady current preset.
2. the detection method of lithium battery energy efficiency according to claim 1, is characterized in that, also comprise step 5: change the steady current preset, and repeats step 2 to 5, obtains the energy efficiency under different steady current.
3. the detection method of lithium battery energy efficiency according to claim 2, is characterized in that, also comprise step 6: under being based upon default environment temperature, under different steady current, mesuring battary carries out the energy efficiency table of discharge and recharge.
4. the detection method of lithium battery energy efficiency according to claim 3, is characterized in that, also comprise step 7: change the environment temperature preset, obtain the energy efficiency table under each environment temperature.
5. according to the detection method of the arbitrary described lithium battery energy efficiency of Claims 1-4, it is characterized in that, the environment temperature preset in described step 1 is-20 DEG C ~ 60 DEG C.
6. the detection method of lithium battery energy efficiency according to claim 5, is characterized in that, the environment temperature preset is-10 DEG C, 0 DEG C, 10 DEG C, 20 DEG C, 30 DEG C, 40 DEG C or 50 DEG C.
7., according to the detection method of the arbitrary described lithium battery energy efficiency of Claims 1-4, it is characterized in that, the Preset Time in described step 1 is 8 ~ 24 hours.
8. according to the detection method of the arbitrary described lithium battery energy efficiency of Claims 1-4, it is characterized in that, the steady current preset in described step 2 is 0.1C ~ 5C.
9. the detection method of lithium battery energy efficiency according to claim 8, is characterized in that, described default steady current is 0.1C, 0.3C, 0.5C, 0.8C, 1C, 2C, 3C, 4C or 5C.
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| CN201510112562.XA CN104698389A (en) | 2015-03-16 | 2015-03-16 | Detection method of lithium battery energy efficiency |
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| CN201510112562.XA CN104698389A (en) | 2015-03-16 | 2015-03-16 | Detection method of lithium battery energy efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105866692A (en) * | 2016-03-30 | 2016-08-17 | 上海中科深江电动车辆有限公司 | Battery energy efficiency test device and test method |
| CN109507591A (en) * | 2018-12-05 | 2019-03-22 | 北京长城华冠汽车科技股份有限公司 | Test method, the test device of battery core |
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| CN103267952A (en) * | 2013-05-12 | 2013-08-28 | 北京工业大学 | Method for measuring charging efficiency of power batteries |
| CN103616644A (en) * | 2013-11-29 | 2014-03-05 | 武汉理工大学 | Method for evaluating properties of storage batteries in different types |
| US20140095060A1 (en) * | 2012-09-28 | 2014-04-03 | Kia Motors Corporation | System and method for calculating distance to empty of green vehicle |
| CN103884989A (en) * | 2012-12-20 | 2014-06-25 | 北汽福田汽车股份有限公司 | Coulombic-efficiency detection method used for SOC estimation of power cell |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140095060A1 (en) * | 2012-09-28 | 2014-04-03 | Kia Motors Corporation | System and method for calculating distance to empty of green vehicle |
| CN103884989A (en) * | 2012-12-20 | 2014-06-25 | 北汽福田汽车股份有限公司 | Coulombic-efficiency detection method used for SOC estimation of power cell |
| CN103267952A (en) * | 2013-05-12 | 2013-08-28 | 北京工业大学 | Method for measuring charging efficiency of power batteries |
| CN103616644A (en) * | 2013-11-29 | 2014-03-05 | 武汉理工大学 | Method for evaluating properties of storage batteries in different types |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105866692A (en) * | 2016-03-30 | 2016-08-17 | 上海中科深江电动车辆有限公司 | Battery energy efficiency test device and test method |
| CN109507591A (en) * | 2018-12-05 | 2019-03-22 | 北京长城华冠汽车科技股份有限公司 | Test method, the test device of battery core |
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