CN103128061B - Method and equipment of sorting dynamic consistency of power batteries - Google Patents
Method and equipment of sorting dynamic consistency of power batteries Download PDFInfo
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- CN103128061B CN103128061B CN201110397750.3A CN201110397750A CN103128061B CN 103128061 B CN103128061 B CN 103128061B CN 201110397750 A CN201110397750 A CN 201110397750A CN 103128061 B CN103128061 B CN 103128061B
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Abstract
The invention discloses a method and equipment of sorting dynamic consistency of power batteries. The method is that charging of high magnification is carried out when the voltage of a battery to be tested is located on platform voltage U0, the charging is stopped when charging time is T1, discharging is carried out on the battery to be tested until the voltage of the battery to be tested is located on the platform voltage U0, the discharging of the high magnification is carried out on the battery to be tested, the time of the discharging of the high magnification is T1, the discharging is finished, at the same the voltage U2 of the battery to be tested is recorded, the difference value of U1 and U0 and the difference value of U0 and U2 are used as the basis of the sorting the dynamic consistency of the power batteries, a battery pack composed of batteries sorted with the method is good in performance due to the fact that the testing method is similar to the practical working condition of the battery.
Description
Technical field
The present invention relates to the method and apparatus of a kind of electrokinetic cell dynamic conformance sorting, belong to battery detecting field.
Background technology
In recent years along with the fast development of electric automobile, increasing to the demand of battery, number of batteries required for an electric automobile is more than 10,000, the battery pack of the battery composition of such big figure requires that the battery consistency of composition is high especially, the mileages of continuation that present people know electric motor car is short, the problem that battery life is short, reason is that certain battery of internal battery pack and other battery performance are inconsistent, in the process of battery pack charging and discharging, this battery there will be super-charge super-discharge phenomenon, when this cell voltage is too high make whole battery pack reach in advance charging deboost time sample circuit can think this battery pack charged terminate stop for battery pack charge, cause the charge less of whole battery pack like this, the performance of battery pack of long duration has to decline significantly and just there will be the short problem of mileages of continuation.
The difference of the Initial Consistency of current battery derives from method that the error that accumulates in manufacture process solves at present usually, and to mainly contain two kinds: one be improve the technological level manufacturing battery, and two is out combined by battery sorting consistent for performance by suitable method for separating again.
Common battery sorting method has platform voltage separating method, static capacity separating method, internal resistance separating method, and in practice, we find, through the battery that these static characteristics of battery sort out, after being operated in identical condition lower a period of time, the performance of battery itself produces great changes, battery capacity, internal resistance, charging and discharging curve are just no longer convergent, result causes battery pack overall performance degradation, the combined effect of battery pack is undesirable, proposes kind of a method and apparatus for electrokinetic cell dynamic conformance sorting for the present invention of these situations.
Summary of the invention
The present invention proposes the method and apparatus of a kind of electrokinetic cell dynamic conformance sorting, and the method can carry out the conforming sorting of electrokinetic cell fast, and this method of testing and the operating mode of actual battery are very similar so the battery performance sub-elected is extremely close to consistent.
For realizing above-mentioned object, the present invention adopts following technical scheme:
The present invention proposes the method and apparatus of a kind of electrokinetic cell dynamic conformance sorting, comprises display and operation interface, controller, charge-discharge modules, high speed analog-to-digital conversion unit, voltage x current analog quantity processing unit, and tested battery is totally 6 part compositions, sees accompanying drawing 1.
With reference to the accompanying drawings 1, the course of work of the present invention is described:
Tested battery is in platform voltage U0 Time Controller control charge-discharge modules and carries out high magnification charging to tested battery, at this moment voltage x current analog quantity processing unit is processed into voltage x current analog quantity the analog quantity that high speed analog-to-digital conversion unit can carry out changing, high speed analog-to-digital conversion unit converts data signal again to voltage x current analog quantity and sends controller to, this process is ongoing, after arriving T1 to the time of tested battery high magnification charging, stopping is charged and records the voltage U 1 of now tested battery, to the platform voltage U0 of tested battery discharge to battery, carry out powerful electric discharge at this moment to again tested battery, the time of high-multiplying power discharge is similarly T1, electric discharge terminates to record tested cell voltage U2 simultaneously, the parameter acquisition of tested battery is terminated, the magnitude of voltage that controller calculating U1 subtracts U0 is U3, the magnitude of voltage that calculating U0 subtracts U2 is U4, sorting standard controller according to being arranged on controller can according to U3 and U4 to cell classification, the tested cell voltage of the whole course of work, charging and discharging currents, sorting class controller can be sent to display in real time and operation interface goes display, sorting classification can be preset by display and operation interface user to be kept in controller.
Beneficial effect of the present invention:
1, the method and apparatus of a kind of electrokinetic cell dynamic conformance sorting is provided
2, the electrokinetic cell method for separating that a kind of low cost, separation velocity are fast is proposed
3, the electrokinetic cell method for separating of a kind of intellectuality, high reliability is proposed.
detailed description of the invention:
In order to make technical scheme of the present invention clearly understand, below in conjunction with drawings and Examples, the present invention is described in more detail, instantiation described herein, only in order to explain the present invention, is not limited to the present invention.
embodiment:
Prepare 18650 type lithium ion battery 100, as tested battery, sorting is carried out according to the method for electrokinetic cell dynamic conformance of the present invention sorting, sub-elect 10 same class performance battery composition battery pack 1, sorting is carried out again with platform voltage separating method, sub-elect 10 same class performance battery composition battery pack 2, sorting is carried out again by the method for static capacity sorting, sub-elect 10 same class performance battery composition battery pack 3, sub-elect 10 same class performance battery composition battery pack 4 with internal resistance separating method equally.
Test under same operating mode by battery pack 1, battery pack 2, battery pack 3, battery pack 4, the cycle life of battery pack 1 is 343 times, the cycle life of battery pack 2 is 298 times, the cycle life of battery pack 3 is 323 times, the cycle life of battery pack 4 is 326 times, therefore can know that the result of sorting of the present invention can make the dynamic property of electrokinetic cell closer to unanimously, the battery life of composition can be more longer.
accompanying drawing illustrates:
Accompanying drawing 1 is the schematic diagram of the equipment part of electrokinetic cell dynamic conformance sorting.
Claims (2)
1. the method for electrokinetic cell dynamic conformance sorting, comprise display and operation interface, controller, charge-discharge modules, high speed analog-to-digital conversion unit, voltage x current analog quantity processing unit, tested battery is totally 6 part compositions, it is characterized by: tested battery is in platform voltage U0 Time Controller control charge-discharge modules and carries out high magnification charging to tested battery, at this moment voltage x current analog quantity processing unit is processed into voltage x current analog quantity the analog quantity that high speed analog-to-digital conversion unit can carry out changing, high speed analog-to-digital conversion unit converts data signal again to voltage x current analog quantity and sends controller to, this process is ongoing, after arriving T1 to the time of tested battery high magnification charging, stopping is charged and records the voltage U 1 of now tested battery, to the platform voltage U0 of tested battery discharge to battery, carry out powerful electric discharge at this moment to again tested battery, the time of high-multiplying power discharge is similarly T1, electric discharge terminates to record tested cell voltage U2 simultaneously, the parameter acquisition of tested battery is terminated, the magnitude of voltage that controller calculating U1 subtracts U0 is U3, the magnitude of voltage that calculating U0 subtracts U2 is U4, sorting standard controller according to being arranged on controller can according to U3 and U4 to cell classification, the tested cell voltage of the whole course of work, charging and discharging currents, sorting class controller can be sent to display in real time and operation interface goes display, sorting classification can be preset by display and operation interface user to be kept in controller.
2. the method for a kind of electrokinetic cell dynamic conformance according to claim 1 sorting, is characterized in that: in battery testing process, adds a powerful current impulse and encourages battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397750.3A CN103128061B (en) | 2011-12-05 | 2011-12-05 | Method and equipment of sorting dynamic consistency of power batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397750.3A CN103128061B (en) | 2011-12-05 | 2011-12-05 | Method and equipment of sorting dynamic consistency of power batteries |
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| Publication Number | Publication Date |
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| CN103128061A CN103128061A (en) | 2013-06-05 |
| CN103128061B true CN103128061B (en) | 2015-04-08 |
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| CN201110397750.3A Expired - Fee Related CN103128061B (en) | 2011-12-05 | 2011-12-05 | Method and equipment of sorting dynamic consistency of power batteries |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106033115A (en) * | 2015-03-20 | 2016-10-19 | 神讯电脑(昆山)有限公司 | Battery screening method |
| CN108732510B (en) * | 2018-07-19 | 2020-07-07 | 哈尔滨工业大学 | Lithium ion battery consistency screening and grouping method based on internal characteristics |
| CN109772753B (en) * | 2019-03-05 | 2020-03-06 | 中国科学院自动化研究所 | Power battery sorting system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2220364A1 (en) * | 1995-05-08 | 1996-11-14 | Koninklijke Ptt Nederland N.V. | A method and device for sorting batteries |
| CN101515022A (en) * | 2008-02-19 | 2009-08-26 | 比亚迪股份有限公司 | Method for evaluating consistency of batteries |
| CN101714663A (en) * | 2009-11-19 | 2010-05-26 | 珠海华冠电子科技有限公司 | Automatic formation and separation method of nickel-metal hydride batteries |
| CN101777669A (en) * | 2010-02-02 | 2010-07-14 | 江西联威新能源有限公司 | Precharging formation method for lithium ion battery |
| CN101907688A (en) * | 2010-08-02 | 2010-12-08 | 天津力神电池股份有限公司 | Method for detecting electrical property consistency of lithium ion battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6781344B1 (en) * | 2003-02-11 | 2004-08-24 | Fuji Photo Film, Inc. | Battery tester and sorting apparatus |
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2011
- 2011-12-05 CN CN201110397750.3A patent/CN103128061B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2220364A1 (en) * | 1995-05-08 | 1996-11-14 | Koninklijke Ptt Nederland N.V. | A method and device for sorting batteries |
| CN101515022A (en) * | 2008-02-19 | 2009-08-26 | 比亚迪股份有限公司 | Method for evaluating consistency of batteries |
| CN101714663A (en) * | 2009-11-19 | 2010-05-26 | 珠海华冠电子科技有限公司 | Automatic formation and separation method of nickel-metal hydride batteries |
| CN101777669A (en) * | 2010-02-02 | 2010-07-14 | 江西联威新能源有限公司 | Precharging formation method for lithium ion battery |
| CN101907688A (en) * | 2010-08-02 | 2010-12-08 | 天津力神电池股份有限公司 | Method for detecting electrical property consistency of lithium ion battery |
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Granted publication date: 20150408 Termination date: 20171205 |