CN104741327B - A kind of lithium-ion-power cell dynamic conformance method for separating - Google Patents
A kind of lithium-ion-power cell dynamic conformance method for separating Download PDFInfo
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- CN104741327B CN104741327B CN201510168715.2A CN201510168715A CN104741327B CN 104741327 B CN104741327 B CN 104741327B CN 201510168715 A CN201510168715 A CN 201510168715A CN 104741327 B CN104741327 B CN 104741327B
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Abstract
The invention discloses a kind of lithium-ion-power cell dynamic conformance method for separating.Including step（1）Preliminary sorting：Pick out the close cell of capacity；（2）The battery core of the cell after preliminary sorting is carried out into 3 ~ 5 complete filling of normal temperature and puts circulation entirely；（3）Record constant-current charge time and the discharge platform voltage time of each battery core, filter out constant current than more than 90%, electric discharge average voltage time more than 45min battery；（4）Filter out the battery with the qualified core of self discharge；（5）Screening internal resistance is in 1 ~ 3m Ω, and battery of the not charged open-circuit voltage within 200mV；（6）It is the battery of standard screening same type with the instantaneous voltage difference during battery high rate charge-discharge.The magnitude of voltage that dynamic sorting method of the present invention is obtained can sort the close cell of influence for standard scores select cell closer to actual condition, and the stack battery performance for obtaining is significantly better than the battery pack that static sorting is obtained.
Description
Technical field
The present invention relates to a kind of lithium-ion-power cell dynamic conformance method for separating, belong to battery sorting field.
Background technology
Recently as the fast development of electric automobile, the demand to battery is increasing, required for an electric automobile
Number of batteries it is thousands of, the battery consistency of the battery request composition of the battery of such big figure composition is especially high, now
The problem that course continuation mileage is short, battery life is short of widely known electric motor car, reason be certain battery of internal battery pack and other
Battery performance is inconsistent, this battery during battery charging and discharging（Or battery strings where single branch battery）Occur and fill height
The phenomenon lowerd, sample circuit will be considered that the battery pack is charged when causing whole battery pack to reach charging limitation voltage in advance
Terminate to stop being charged for battery pack, so cause the charge less of whole battery pack, cause battery capacity not enough, using process
The performance of middle battery pack to have significantly decline and just occur course continuation mileage shortening, or even triggers safety problem.
Current battery sorting method has platform voltage separating method, static capacity separating method, internal resistance separating method, and in reality
In, it has been found that by the battery that these static methods are sorted out, after being assembled into stack battery, in identical work
Under the conditions of, battery performance in itself can change a lot, and the capacity of battery, internal resistance and charging and discharging curve occur change,
Result causes the overall performance degradation of battery pack, influences the performance of battery pack, and for these situations, the present invention is proposed
A kind of dynamic method of testing sorts cell.
The content of the invention
It is an object of the invention to provide a kind of lithium-ion-power cell dynamic conformance method for separating, mainly solve existing
The battery that sub-elects of battery sorting method be assembled into stack battery after, the low problem of overall performance.Cell it is consistent
Property be the groups of key of battery, directly affects life-span and the performance of stack battery, the present invention proposes battery core after static state sorting,
With a kind of dynamic method for separating, performance is close consistent after battery that is simple to operate, sorting out runs in groups.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of lithium-ion-power cell dynamic conformance method for separating, comprises the following steps：Battery is first carried out static point
Choosing, then enters Mobile state sorting；
The static sorting step：
（1）Preliminary sorting：Pick out the close cell of capacity, capacity difference≤50mAh；
（2）The battery core of the cell after preliminary sorting is carried out into 3 ~ 5 complete filling of normal temperature and puts circulation entirely；
（3）Record constant-current charge time and the discharge platform voltage time of each battery core, filter out constant current ratio 90% with
Battery of upper, the discharge platform voltage time in more than 45min；
（4）45 DEG C of the not charged battery battery core high temperature that will have been screened stands 10 days, after then normal temperature stands 4 ~ 6h, filters out
Battery with the qualified battery core of self discharge, the qualified standard is voltage difference △ V≤50mV before and after standing；
（5）Screening internal resistance is in 1 ~ 3m Ω, and battery of the not charged open-circuit voltage within 200mV；
The dynamic sorting step：
（6）It is the battery of standard screening same type with the instantaneous voltage difference during battery high rate charge-discharge.
Specifically, the step（6）Specific screening technique be：Will be by step（5）Each battery battery core for filtering out afterwards
Charged with 4 ~ 6C under the conditions of 80%SOC, and discharged with 8 ~ 10C under 10% ~ 20%SOC states, collection charging and discharging 10s
Instantaneous Situation voltage, screening is charged within dynamic voltage difference is 7mV, and electric discharge dynamic electric voltage difference is the electricity within 10mV
Pond.
Compared with prior art, the invention has the advantages that：
（1）The present invention is that corresponding dynamic electric voltage instantaneous value, this voltage are recorded after being put using dynamic heavy current pulse and arteries and veins
Instantaneous value combines the situation of change of polarization resistance, ohmic internal resistance, large current density condition and voltage, with this dynamic sorting method
The magnitude of voltage for obtaining can sort the close cell of influence for standard scores select cell closer to actual condition, obtain
Stack battery performance is significantly better than the battery pack that static sorting is obtained.
Brief description of the drawings
Fig. 1 is workflow diagram of the invention.
Fig. 2 is experimental data contrast effect figure of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention are included but is not limited to
The following example.
Embodiment
As shown in figure 1, a kind of lithium-ion-power cell dynamic conformance method for separating, comprises the following steps：
（1）Preliminary sorting：Pick out the close cell of capacity, capacity difference≤50mAh；
（2）The battery core of the cell after preliminary sorting is carried out into 3 ~ 5 complete filling of normal temperature and puts circulation entirely, it is ensured that experiment
Accuracy；
（3）Record constant-current charge time and the discharge platform voltage time of each battery core, filter out constant current ratio 90% with
Battery of upper, the discharge platform voltage time in more than 45min；
（4）45 DEG C of the not charged battery battery core high temperature that will have been sorted stands 10 days, after then normal temperature stands 4 ~ 6h, filters out
Battery with the qualified battery core of self discharge, the qualified standard is voltage difference △ V≤50mV before and after standing；
（5）Screening internal resistance is in 1 ~ 3m Ω, and battery of the not charged open-circuit voltage within 200mV；
（6）It is the battery of standard screening same type with the instantaneous voltage difference during battery high rate charge-discharge, specially：
Each battery battery core that will be filtered out is charged under the conditions of 80%SOC with 4 ~ 6C, and is discharged with 8 ~ 10C under 10% ~ 20%SOC states,
Collection charging and discharging 10s Instantaneous Situation voltages, screening is charged within dynamic voltage difference is 7mV, and electric discharge dynamic electric voltage
Difference is the battery within 10mV.
The present invention is that corresponding dynamic electric voltage instantaneous value, this voltage transient are recorded after being put using dynamic heavy current pulse and arteries and veins
Value combines the situation of change of polarization resistance, ohmic internal resistance, large current density condition and voltage, is obtained with this dynamic sorting method
Magnitude of voltage for standard scores select cell can be closer to actual condition, the close cell of sorting influence is obtained in groups
Battery performance is significantly better than the battery pack that static sorting is obtained.
Such as Fig. 2（a）It is that the battery pack that 10 cells obtained using existing static method for separating are connected into is run
Discharge curve after 50 times, Fig. 2（b）It is to be put point by 80%SOC pulses and 10%SOC arteries and veins using dynamic sorting method of the invention
10 cells of choosing run the discharge curve after 50 times after being connected into battery pack.
From Fig. 2（a）With 2（b）Knowable to Experimental comparison, the battery that the cell obtained using static method for separating is constituted
There is decay in group, battery capacity, and capacity is taken a walk and substantially increase.And the monomer electricity obtained using dynamic sorting method of the present invention
The battery pack of pond composition, battery capacity keeps preferable uniformity.
Experiment shows, using dynamic sorting method, during taken into full account that polarization resistance, ohmic internal resistance and high current are filled
The influence discharged to cell, the close cell of sorting influence, the stack battery performance for obtaining is significantly better than static point
The battery pack that choosing is obtained.
According to above-described embodiment, the present invention just can be well realized.What deserves to be explained is, before said structure design
Put, to solve same technical problem, even if making some in the present invention without substantial change or polishing, used
The essence of technical scheme is still as the present invention, therefore it should also be as within the scope of the present invention.
Claims (3)
1. a kind of lithium-ion-power cell dynamic conformance method for separating, it is characterised in that comprise the following steps：First battery is entered
The static sorting of row, then enters Mobile state sorting；
The static sorting step：
(1) preliminary sorting：Pick out the close cell of capacity；
(2) battery core of the cell after preliminary sorting is carried out into 3~5 complete filling of normal temperature and puts circulation entirely；
(3) constant-current charge time and the discharge platform voltage time of each battery core are recorded, filter out constant current ratio more than 90%, put
Battery of the level platform voltage time in more than 45min；
(4) the not charged battery battery core quiescence in high temperature that will have been screened, the condition of standing is：45 DEG C stand 10 days, and then normal temperature is quiet
After putting 4~6h, filter out the battery with the qualified battery core of self discharge, the qualified standard for voltage difference △ V before and after standing≤
50mV；
(5) screening internal resistance is in 1~3m Ω, and battery of the not charged open-circuit voltage within 200mV；
The dynamic sorting step：
(6) it is the battery of standard screening same type with the instantaneous voltage difference during battery high rate charge-discharge.
2. a kind of lithium-ion-power cell dynamic conformance method for separating according to claim 1, it is characterised in that described
In step (1), the capacity difference≤50mAh of cell.
3. a kind of lithium-ion-power cell dynamic conformance method for separating according to claim 2, it is characterised in that described
The specific screening technique of step (6) is：Each battery battery core that will be filtered out after step (5) under the conditions of 80%SOC with 4~
6C charges, and is discharged with 8~10C under 10%~20%SOC states, gathers charging and discharging 10s Instantaneous Situation voltages, sieve
Choosing is charged within dynamic voltage difference is 7mV, and electric discharge dynamic electric voltage difference is the battery within 10mV.
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Families Citing this family (22)
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| CN105304954B (en) * | 2015-09-30 | 2017-12-26 | 东莞市致格电池科技有限公司 | The method for group matching and its combo system of a kind of battery |
| WO2017092005A1 (en) * | 2015-12-03 | 2017-06-08 | SZ DJI Technology Co., Ltd. | System and method for determining operational status of battery |
| CN105489952A (en) * | 2016-01-08 | 2016-04-13 | 深圳市沃特玛电池有限公司 | Matching method for improving self-discharge consistency of lithium iron phosphate power battery pack |
| CN105583170B (en) * | 2016-01-28 | 2017-12-26 | 珠海光宇电池有限公司 | A kind of screening technique of lithium ion battery |
| CN107992149B (en) * | 2016-10-27 | 2020-02-07 | 中芯国际集成电路制造(上海)有限公司 | Trimming method and trimming device of voltage band gap circuit |
| CN106450520B (en) * | 2016-10-28 | 2019-05-14 | 天津市捷威动力工业有限公司 | A kind of power battery core method for separating and system |
| CN107362989B (en) * | 2017-07-27 | 2019-11-08 | 威胜集团有限公司 | A kind of method for separating of lithium-ion-power cell |
| CN108051751B (en) * | 2017-11-25 | 2020-02-18 | 合肥国轩高科动力能源有限公司 | Lithium ion power battery sorting method and system |
| CN108196195B (en) * | 2017-12-27 | 2020-12-22 | 银隆新能源股份有限公司 | Battery assembling method, device and equipment |
| CN108196204A (en) * | 2018-03-08 | 2018-06-22 | 珠海格力电器股份有限公司 | A kind of method and test device of quick detection lithium ion battery self discharge consistency |
| CN108776307A (en) * | 2018-04-24 | 2018-11-09 | 合肥国轩高科动力能源有限公司 | A kind of lithium-ion electric core conformity classification method based on battery core quantity of heat production |
| CN108680868B (en) * | 2018-05-28 | 2020-09-11 | 天津市捷威动力工业有限公司 | Battery pack cycle test consistency analysis method |
| CN110813799A (en) * | 2018-08-13 | 2020-02-21 | 中信国安盟固利动力科技有限公司 | Consistency screening method of lithium titanate single battery for high rate |
| CN109324297A (en) * | 2018-10-19 | 2019-02-12 | 张瑞锋 | A kind of method of consistency of battery pack analysis |
| CN109782193B (en) * | 2018-12-13 | 2023-10-24 | 惠州市亿能电子有限公司 | Method for judging circuit breaking of multi-branch battery pack |
| CN110201913B (en) * | 2019-05-29 | 2020-12-29 | 河南电池研究院有限公司 | Screening method for consistency of soft package lithium ion battery |
| CN110221227B (en) * | 2019-05-31 | 2022-01-14 | 上海动力储能电池系统工程技术有限公司 | Method for evaluating state consistency of single batteries in battery module |
| CN111063951A (en) * | 2019-11-19 | 2020-04-24 | 安徽益佳通电池有限公司 | Method for screening and matching self-discharge of lithium ion battery |
| CN111036575B (en) * | 2019-12-05 | 2022-05-24 | 国电南瑞科技股份有限公司 | Lithium ion battery sorting method based on temperature change analysis |
| CN111722128B (en) * | 2020-05-19 | 2023-04-04 | 风帆有限责任公司 | Low-voltage matching method for lithium batteries |
| CN112083347B (en) * | 2020-08-20 | 2023-06-30 | 上海电享信息科技有限公司 | Screening method for power batteries of electric vehicles |
| CN113399309A (en) * | 2021-05-27 | 2021-09-17 | 安徽天时新能源科技有限公司 | Screening method for monitoring consistency of capacity of discharge end of battery cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760914A (en) * | 2012-07-20 | 2012-10-31 | 深圳市雄韬电源科技股份有限公司 | Matching method for lithium ion power batteries |
| CN102800901A (en) * | 2012-08-21 | 2012-11-28 | 成都银鑫新能源有限公司 | Classification and pack distribution method for single battery of lithium ion battery pack |
| CN102903957A (en) * | 2012-09-29 | 2013-01-30 | 江苏恒迅中锂新能源科技有限公司 | Method for rapidly screening self discharge of lithium iron phosphate battery |
| CN104668207A (en) * | 2015-02-16 | 2015-06-03 | 深圳市沃特玛电池有限公司 | Method for enhancing screening consistency of lithium-ion power battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110107070A (en) * | 2010-03-24 | 2011-09-30 | 삼성에스디아이 주식회사 | Sorting machine of battery cell and sorting method thereof |
-
2015
- 2015-04-10 CN CN201510168715.2A patent/CN104741327B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760914A (en) * | 2012-07-20 | 2012-10-31 | 深圳市雄韬电源科技股份有限公司 | Matching method for lithium ion power batteries |
| CN102800901A (en) * | 2012-08-21 | 2012-11-28 | 成都银鑫新能源有限公司 | Classification and pack distribution method for single battery of lithium ion battery pack |
| CN102903957A (en) * | 2012-09-29 | 2013-01-30 | 江苏恒迅中锂新能源科技有限公司 | Method for rapidly screening self discharge of lithium iron phosphate battery |
| CN104668207A (en) * | 2015-02-16 | 2015-06-03 | 深圳市沃特玛电池有限公司 | Method for enhancing screening consistency of lithium-ion power battery |
Non-Patent Citations (1)
| Title |
|---|
| 磷酸铁锂电池及其新能源汽车启动电源性能研究;饶睦敏等;《新能源进展》;20150210;第3卷(第1期);第70-74页 * |
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