CN105728352B - A kind of battery sorting method - Google Patents
A kind of battery sorting method Download PDFInfo
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- CN105728352B CN105728352B CN201610192087.6A CN201610192087A CN105728352B CN 105728352 B CN105728352 B CN 105728352B CN 201610192087 A CN201610192087 A CN 201610192087A CN 105728352 B CN105728352 B CN 105728352B
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- battery
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000007405 data analysis Methods 0.000 claims abstract description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
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Abstract
The present invention relates to a kind of battery sorting method, including step：(1) constant current charge-discharge is carried out three weeks with the multiplying power of 0.2C~1C to empty state single battery, data analysis is done with the discharge and recharge data in last week；(2) normal distribution of battery capacity is counted；(3) coulombic efficiency of battery charging and discharging is calculated, counts the normal distribution of battery coulombic efficiency；(4) energy efficiency of battery charging and discharging is calculated, counts the normal distribution of energy content of battery efficiency；(5) single battery that coefficient of standard deviation is less than 1% is gradually picked out from the step (2), (3), (4) three；(6) single battery selected in the step (5) is mended into electricity 50%SOC, places in 45 DEG C of environment and stand 7 days, calculated and stand front and rear pressure difference and counted, pick out single battery of the coefficient of standard deviation less than 1% as spec battery.
Description
Technical field
The present invention relates to a kind of battery sorting method, more particularly to a kind of lithium-ion-power cell dynamic conformance sorting side
Method.
Background technology
It is more next to the demand of lithium-ion-power cell as electric automobile is increasingly prevailing and the intensified competition of new energy industry
It is bigger, while also more and more harsh, the either list of the application of stack battery module or stack battery module is required it
Body battery, weighs the uniformity that its important references best in quality is exactly lithium ion battery, and battery consistency is good for it
The benefit of application is self-evident, is led since lithium ion battery makes system, technology, inconsistent in technique and raw material type selecting
The different batches battery that each producer or same producer produce is caused all there are different degrees of performance difference, with electric in groups
Pond module increases monomer lithium ion battery demand, to ensure the property in terms of stack battery module life, efficiency and security
There can be outstanding performance, battery industry and academia are being directed to the method how research improves battery consistency always.
Ripe lithium ion battery sorting technology is partial to static separating method at present, and specific method is the constant pressure for detecting battery
Discharge capacity after charging, shelve after open-circuit voltage and 1KHz AC internal Resistance, according to the statistics Distribution value of this three parameters,
Carry out some grades of classification.This set sorting technology of current industrialization be based on lithium ion battery applications in the digital product epoch and
It is derived, the battery that this stepping technology sorts out is in integrated more series parallel structure, and reply is more multiple
Still there are many technology blind areas in miscellaneous applying working condition, not enough targetedly, for being applicable in current vehicle-mounted electrokinetic cell system or storage
The PACK requirements of energy system requirements.
The content of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of battery sorting method, coefficient of standard deviation is used
The dynamic conformance of charge-discharge parameter in monomer lithium ion battery test process is assessed, uses the operating mode of simulated battery application terminal
The outstanding single battery of method sorting uniformity.
The battery sorting method of the present invention, including step：
(1) constant current charge-discharge is carried out three weeks with the multiplying power of 0.2C~1C to empty state single battery, with the charge and discharge in last week
Electric data do data analysis；
(2) normal distribution of battery capacity is counted, the coefficient of standard deviation for picking out capacity distribution is less than or equal to 1% electricity
Pond；
(3) coulombic efficiency of battery charging and discharging is calculated, the normal distribution of battery coulombic efficiency is counted, picks out discharge and recharge storehouse
The coefficient of standard deviation of human relations efficiency is less than or equal to 1% battery；
(4) energy efficiency of battery charging and discharging is calculated, the normal distribution of energy content of battery efficiency is counted, picks out battery charge and discharge
The coefficient of standard deviation of electric energy amount efficiency is less than or equal to 1% battery；
(5) single battery selected in the step (4) is mended into electricity 50%SOC, places in 45 DEG C of environment and stand 7 days, counted
Calculate and stand front and rear pressure difference and counted, pick out single battery of the coefficient of standard deviation less than 1% as spec battery.
Further, calculated in step (2)-(4) battery capacity, coulombic efficiency and energy efficiency average value,
Standard deviation and coefficient of standard deviation, if the battery capacity of sorting the coefficient of standard deviation of coulombic efficiency and energy efficiency be more than
1%, sub-elected again with range method meet battery capacity coulombic efficiency and energy efficiency distribution coefficient of standard deviation be less than or equal to
1% battery.
Further, the range method is：Calculate battery capacity coulombic efficiency and energy efficiency and the pole of its average value
Difference, rejecting and the very poor maximum battery of average value, then calculate average value, standard deviation and the standard deviation system of selected battery
Number, until the poor coefficient of mark is less than or equal to 1%.
According to the above aspect of the present invention, the battery sorting method of the present invention is tested using coefficient of standard deviation assessment monomer lithium ion battery
During charge-discharge parameter dynamic conformance, use the outstanding list of operating mode method sorting uniformity of simulated battery application terminal
Body battery, the battery pack for the single battery composition that method using the present invention sorts, battery capacity keep preferable one
Cause property.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, described in detail below with presently preferred embodiments of the present invention as after.
Embodiment
With reference to embodiment, the embodiment of the present invention is described in further detail.Following embodiments are used for
Illustrate the present invention, but be not limited to the scope of the present invention.
When sorting battery, constant current charge-discharge first is carried out three weeks with the multiplying power of 0.5C to empty state single battery, with last week
Discharge and recharge data do data analysis.By single battery discharge and recharge three weeks, mainly single battery is allowed to tend in this process
Stable state, is used as analysis data so that the result of analysis is accurately and reliably using the discharge and recharge data in last week.Analyzed
After data, the section that battery capacity sorts is set to 1050~1100mAh grades, selects the battery of battery capacity qualification；To qualification
Battery calculated, that is, calculate average value, standard deviation and the coefficient of standard deviation of battery capacity；Judge the mark of battery capacity
Whether quasi- difference coefficient is more than 1%, and 1% battery is more than for coefficient of standard deviation, is sorted again with range method；Battery is calculated to hold
Amount and the very poor value of average value, rejecting and the very poor maximum battery of average value, then calculate the average value of selected battery, standard
Difference and coefficient of standard deviation, are less than or equal to 1% until marking poor coefficient, sub-elect and meet that the coefficient of standard deviation of capacity distribution is small
In the battery equal to 1%.Battery charging and discharging coulombic efficiency is calculated again, and sorting mode is sorted such as capacity, sub-elects discharge and recharge storehouse
Human relations efficiency standard difference coefficient meets the battery less than or equal to 1%.Then battery charging and discharging energy efficiency is calculated, sorting mode is such as
Sorted with capacity, sub-elect charge-discharge energy efficiency standard difference coefficient and meet to be less than or equal to 1% battery.Finally, will be final
The single battery selected mends electricity 50%SOC, places in 45 DEG C of environment and stands 7 days, calculates and stands front and rear pressure difference and counted,
Single battery of the coefficient of standard deviation less than 1% is picked out as spec battery.
The above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (3)
- A kind of 1. battery sorting method, it is characterised in that including step：(1) constant current charge-discharge is carried out three weeks with the multiplying power of 0.2C~1C to empty state single battery, with the discharge and recharge number in last week According to doing data analysis；(2) normal distribution of battery capacity is counted, the coefficient of standard deviation for picking out capacity distribution is less than or equal to 1% battery；(3) coulombic efficiency of battery charging and discharging is calculated, counts the normal distribution of battery coulombic efficiency, picks out discharge and recharge coulomb effect The coefficient of standard deviation of rate is less than or equal to 1% battery；(4) energy efficiency of battery charging and discharging is calculated, the normal distribution of energy content of battery efficiency is counted, picks out battery charging and discharging energy The coefficient of standard deviation of amount efficiency is less than or equal to 1% battery；(5) single battery selected in the step (4) is mended into electricity 50%SOC, places in 45 DEG C of environment and stand 7 days, calculated quiet Put front and rear pressure difference and counted, pick out single battery of the coefficient of standard deviation less than 1% as spec battery.
- 2. battery sorting method according to claim 1, it is characterised in that：Battery is calculated in step (2)-(4) Capacity, the average value of coulombic efficiency and energy efficiency, standard deviation and coefficient of standard deviation, if the battery capacity of sorting, coulomb effect The coefficient of standard deviation of rate and energy efficiency is more than 1%, is sub-elected again with range method and meets battery capacity, coulombic efficiency and energy The coefficient of standard deviation of amount efficiency distribution is less than or equal to 1% battery.
- 3. battery sorting method according to claim 2, it is characterised in that：The range method is：Calculate battery capacity, storehouse Human relations efficiency and energy efficiency and the very poor value of its average value, rejecting and the very poor maximum battery of average value, then calculate institute Average value, standard deviation and the coefficient of standard deviation of battery are selected, until the poor coefficient of mark is less than or equal to 1%.
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| CN201610192087.6A CN105728352B (en) | 2016-03-30 | 2016-03-30 | A kind of battery sorting method |
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| CN201610192087.6A CN105728352B (en) | 2016-03-30 | 2016-03-30 | A kind of battery sorting method |
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| CN105728352A CN105728352A (en) | 2016-07-06 |
| CN105728352B true CN105728352B (en) | 2018-05-11 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107377422B (en) * | 2017-07-27 | 2019-06-07 | 东莞威胜储能技术有限公司 | A kind of method for separating of single battery |
| CN107225104B (en) * | 2017-07-27 | 2019-09-20 | 东莞威胜储能技术有限公司 | A kind of method for separating of battery |
| CN108246658B (en) * | 2017-12-12 | 2020-03-20 | 合肥国轩高科动力能源有限公司 | Method for screening consistency of lithium iron phosphate batteries |
| CN109530275A (en) * | 2018-12-04 | 2019-03-29 | 中国电力科学研究院有限公司 | Retired battery sorting method and system |
| CN110333463B (en) * | 2019-07-09 | 2021-10-29 | 深圳市清新电源研究院 | Battery cell consistency screening method and system |
| CN113996564A (en) * | 2021-12-02 | 2022-02-01 | 格林美股份有限公司 | Lithium battery echelon utilization and sorting method and device based on characteristic numerical analysis |
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| CN103439665A (en) * | 2013-08-30 | 2013-12-11 | 长城汽车股份有限公司 | Power battery echelon utilization analysis method |
| CN103545567A (en) * | 2013-10-16 | 2014-01-29 | 宁波世捷新能源科技有限公司 | Method used for rapid sorting of lithium ion batteries |
| CN104607395A (en) * | 2013-11-01 | 2015-05-13 | 北汽福田汽车股份有限公司 | lithium ion battery sorting method |
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| CN105728352A (en) | 2016-07-06 |
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Effective date of registration: 20181008 Address after: 313000 Zhejiang Xintang Huzhou Road Industrial Function Zone, Changxing County 1 Patentee after: Zhejiang Yi Ge Energy Co. Ltd. Address before: 215000 119B room, A building, new industry incubator, Zhangjiagang Free Trade Zone, Suzhou, Jiangsu Patentee before: Zhangjiagang Lv Li power technology Co., Ltd |
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Effective date of registration: 20211018 Address after: 315800 Room 301, third floor, No. 1, building 3, No. 56, Weiyi Road, Xiaogang street, Beilun District, Ningbo City, Zhejiang Province Patentee after: ZHEJIANG EAGLE KEDI DILI TECHNOLOGY Co.,Ltd. Address before: 313000 Zhejiang Xintang Huzhou Road Industrial Function Zone, Changxing County 1 Patentee before: ZHEJIANG YIGE ENERGY Co.,Ltd. |
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