CN103506328A - Combined sorting method of power batteries, and apparatus thereof - Google Patents
Combined sorting method of power batteries, and apparatus thereof Download PDFInfo
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- CN103506328A CN103506328A CN201210202232.6A CN201210202232A CN103506328A CN 103506328 A CN103506328 A CN 103506328A CN 201210202232 A CN201210202232 A CN 201210202232A CN 103506328 A CN103506328 A CN 103506328A
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Abstract
The invention provides a combined sorting method of power batteries, and an apparatus thereof. The combined sorting method combines a platform voltage sorting method, a static capacity sorting method, an internal resistance sorting method and a charge-discharge characteristic curve sorting method to sort batteries. The performances of batteries sorted by the combined sorting method are highly consistent with each other. The combined sorting method is realized based on the platform voltage sorting method, the static capacity sorting method, the internal resistance sorting method and the charge-discharge characteristic curve sorting method, so the battery sorting quality is substantially improved without prolonging the battery sorting time.
Description
Technical field
The compounding separation method and the device that the present invention relates to a kind of electrokinetic cell, belong to battery detecting field.
Background technology
Continuous expansion along with battery applications field, battery has become the indispensable a kind of energy form of contemporary society, in recent years along with the development of electric automobile, the demand of battery is increased sharply, simultaneously more and more higher to the performance requirement of battery, a current needed number of batteries of electric automobile is more than 10,000, these battery pack are fitted together and form a huge battery pack, this battery pack requires the uniformity of battery very good, if inner certain battery of battery pack and other battery performance are inconsistent, in the process of batteries charging electric discharge, 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 during deboost sample circuit can think that this battery pack has been charged and finish to stop as batteries charging, caused like this charge less of whole battery pack, the performance of battery pack of long duration has significantly and declines.
The difference of the Initial Consistency of current battery conventionally derives from the current method solving of the error accumulating in manufacture process and mainly contains two kinds: the one, improve the technological level of manufacturing battery, and the 2nd, by suitable method for separating, the consistent battery sorting of performance is out combined again.
Common battery sorting method has platform voltage separating method, static capacity separating method, internal resistance separating method, charge-discharge characteristic curve separating method, and in practice, we find, the battery that these static characteristics of process battery sort out, after being operated in identical lower a period of time of condition, the performance of battery itself produces great changes, and battery capacity, internal resistance, charging and discharging curve are just no longer tending towards identical, result causes battery pack overall performance degradation, and the combined effect of battery pack is undesirable.
Summary of the invention
In order to overcome the deficiency of electrokinetic cell method for separating before, improve combined efficiency and the effect of power battery pack, the present invention proposes a kind of compounding separation method and device of electrokinetic cell.
The technical solution adopted for the present invention to solve the technical problems is: platform voltage separating method, static capacity separating method, internal resistance separating method, charge-discharge characteristic curve separating method are combined to the sorting of carrying out electrokinetic cell, the battery performance that this method sub-elects approaches consistent very much, because this separating method is to realize on the basis of platform voltage separating method, static capacity separating method, internal resistance separating method, charge-discharge characteristic curve separating method, so the battery sorting time does not lengthen, the quality of battery sorting has but improved greatly.
For realizing above-mentioned object, compounding separation method and the device of electrokinetic cell: comprise separation results memory module, control and data processing module, high-speed sampling module, voltage and current signal processing module, internal resistance measurement module, charge-discharge modules, tested battery, see accompanying drawing 1.
With reference to the accompanying drawings 1, the course of work of the present invention is described:
Control and data processing module are controlled charging and discharging module to tested battery charging, after voltage and current signal processing module, high-speed sampling module can convert data signal to analog signal and deliver to control and data processing module, control and data processing module are delivered to the storage of separation results memory module after processing the battery parameter that transmits, until whole test period finishes, until tested cell voltage carries out constant-voltage charge after reaching predeterminated voltage, after finishing, constant-voltage charge stops charging, control and data processing module are controlled internal resistance control module and are carried out internal resistance test, control and data processing module obtain tested internal resistance, after processing internal resistance value, deliver to the storage of separation results memory module, discharge next to again tested battery, till discharging into default blanking voltage, whole like this to battery testing end cycle, controller and data processing module recall the data analysis in separation results memory module, arrangement calculates the platform voltage of tested battery, amount of capacity, internal resistance value and charge-discharge characteristic curve sorting process.
Beneficial effect of the present invention:
1. the electrokinetic cell method for separating of propose a kind of low cost, easily realizing;
2. a kind of electrokinetic cell method for separating of high reliability is proposed.
accompanying drawing explanation:
Accompanying drawing 1 is the compounding separation method of electrokinetic cell and the schematic diagram of device.
the specific embodiment:
In order to make technical scheme of the present invention clearer, below in conjunction with drawings and Examples, the present invention is described in more detail, and instantiation described herein only, in order to explain the present invention, is not limited to the present invention.
embodiment:
Prepare 100 of 18650 type lithium ion batteries, as tested battery, use method and the device of electrokinetic cell combination sorting of the present invention to carry out sorting:
1) sub-elect 10 same class performance batteries and form battery pack 1, with platform voltage separating method, carry out sorting again, sub-elect 10 same class performance batteries and form battery pack 2, by the method for static capacity sorting, carry out sorting again, sub-elect 10 same class performance batteries and form battery pack 3, with the battery that internal resistance separating method and charge-discharge characteristic curve separating method respectively sub-elect 10 same class performances, form respectively battery pack 4 and battery pack 5 equally;
2) take battery pack 1, battery pack 2, battery pack 3, battery pack 4, battery pack 5 to test under same operating mode, the cycle life of battery pack 1 is 368 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 336 times, the cycle life of battery pack 5 is 342 times, therefore can know that the result of application sorting of the present invention can make the performance of electrokinetic cell approach unanimously, and the battery pack life-span of composition can be more longer.
Claims (2)
1. compounding separation method and the device of electrokinetic cell, comprise separation results memory module, control and data processing module, high-speed sampling module, voltage and current signal processing module, internal resistance measurement module, charge-discharge modules, it is characterized in that: control and data processing module are controlled charging and discharging module to tested battery charging, after voltage and current signal processing module, high-speed sampling module can convert data signal to analog signal and deliver to control and data processing module, control and data processing module are delivered to the storage of separation results memory module after processing the battery parameter that transmits, until whole test period finishes, until tested cell voltage carries out constant-voltage charge after reaching predeterminated voltage, after finishing, constant-voltage charge stops charging, control and data processing module are controlled internal resistance control module and are carried out internal resistance test, control and data processing module obtain tested internal resistance, after processing internal resistance value, deliver to the storage of separation results memory module, discharge next to again tested battery, till discharging into default blanking voltage, whole like this to battery testing end cycle, controller and data processing module recall the data analysis in separation results memory module, arrangement calculates the platform voltage of tested battery, amount of capacity, internal resistance value and charge-discharge characteristic curve sorting process.
2. compounding separation method and the device of electrokinetic cell according to claim 1, is characterized in that: the electrokinetic cell combination method for separating that platform voltage separating method, static capacity separating method, internal resistance separating method, 4 kinds of methods of charge-discharge characteristic curve separating method form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202232.6A CN103506328A (en) | 2012-06-19 | 2012-06-19 | Combined sorting method of power batteries, and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202232.6A CN103506328A (en) | 2012-06-19 | 2012-06-19 | Combined sorting method of power batteries, and apparatus thereof |
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| CN103506328A true CN103506328A (en) | 2014-01-15 |
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| CN201210202232.6A Pending CN103506328A (en) | 2012-06-19 | 2012-06-19 | Combined sorting method of power batteries, and apparatus thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090239A (en) * | 2014-06-26 | 2014-10-08 | 武汉中原长江科技发展有限公司 | Series connection lithium ion battery screening method |
| CN105032782A (en) * | 2015-05-07 | 2015-11-11 | 长兴天越新能源科技有限公司 | Full-automatic assembly line battery grouping system based on quickly continuous detection |
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2012
- 2012-06-19 CN CN201210202232.6A patent/CN103506328A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090239A (en) * | 2014-06-26 | 2014-10-08 | 武汉中原长江科技发展有限公司 | Series connection lithium ion battery screening method |
| CN105032782A (en) * | 2015-05-07 | 2015-11-11 | 长兴天越新能源科技有限公司 | Full-automatic assembly line battery grouping system based on quickly continuous detection |
| CN105032782B (en) * | 2015-05-07 | 2017-10-10 | 长兴天越新能源科技有限公司 | It is a kind of based on the full-automatic assembly line battery combo system quickly continuously detected |
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Application publication date: 20140115 |