CN107457194A - A kind of power battery core echelon utilizes and screens method for group matching - Google Patents
A kind of power battery core echelon utilizes and screens method for group matching Download PDFInfo
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- CN107457194A CN107457194A CN201610383662.0A CN201610383662A CN107457194A CN 107457194 A CN107457194 A CN 107457194A CN 201610383662 A CN201610383662 A CN 201610383662A CN 107457194 A CN107457194 A CN 107457194A
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- battery core
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- group matching
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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
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
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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
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/38—Collecting or arranging articles in groups
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Abstract
Utilized the present invention relates to a kind of power battery core echelon and screen method for group matching, including：Step 1, the battery core to fractionation carry out quiescent voltage measurement and record V1；Step 2, the battery core to fractionation carry out quiescent voltage measurement and record V2；Step 3, V1 V2 the first given thresholds of ＜；Step 4, for battery core after security filtering constant-current discharge is carried out to lower voltage limit value according to setting multiplying power, shelve, carry out constant-current charge to upper voltage limit value according to setting multiplying power, shelve, constant-current discharge is carried out to setting state-of-charge according to setting multiplying power, and records discharge capacity Q and quiescent voltage V3；Step 5, setting state-of-charge carry out bounce voltage measurement to battery core and record V4；Step 6, V4 V3 the second given thresholds of ＞；Step 7, battery core combo are first according to battery core V4 V3 bounce voltages difference and carry out stepping, and final stepping is carried out according still further to discharge capacity Q.Compared with prior art, the present invention has the advantages that safe, easy to operate.
Description
Technical field
The present invention relates to a kind of power battery core to screen method for group matching, and screening is utilized more particularly, to a kind of power battery core echelon
Method for group matching.
Background technology
With the progressively industrialization of electric automobile, there will be large batch of automobile-used battery core to be eliminated within the coming years.Power
Although battery core can not continue on for electric automobile, it is also possible to require battery core relatively low occasion for other, such as energy storage system
System etc..The method that we are utilized by echelon come extend the service life of battery core, reduce power battery core overall life cycle cost, it is right
Promote the sound development of electric automobile industry significant.
The pattern that the echelon of current driving force battery core still carry over fresh battery core using screening and combo is carried out, main sorting
Method is capacitance-resistance separating method.Before combo by battery core charge and discharge cycles several times, according in pre-set discharge capacity and static state
Resistance carries out combo.This method is as far as possible consistent from parameters such as the internal resistance of theory calls battery core, capacity, so as to discharge battery core
Go out the power of maximum.But these actual parameters and the especially retired rear battery core of the difference unrealistically reflected between battery core, finally
After assembling use can be caused, battery core group does not reach the effect that echelon utilizes, and adds the cost of redesign on the contrary.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of power battery core echelon
Using screening method for group matching.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of power battery core echelon is comprised the following steps using method for group matching is screened：
Step 1, the battery core to fractionation carry out quiescent voltage measurement and record V1；
Step 2, the battery core to fractionation carry out quiescent voltage measurement and record V2；
Step 3, the given thresholds of V1-V2 ＜ first, step 4 is performed, be otherwise judged as safe defective products and force to reject；
Step 4, for battery core after security filtering according to setting multiplying power carry out constant-current discharge to lower voltage limit value, shelve, press
Constant-current charge is carried out to upper voltage limit value according to setting multiplying power, is shelved, and constant-current discharge is carried out to setting charged shape according to setting multiplying power
State, and record discharge capacity Q and quiescent voltage V3；
Step 5, setting state-of-charge carry out bounce voltage measurement to battery core and record V4；
Step 6, the given thresholds of V4-V3 ＞ second, step 7 is performed, be otherwise judged as safe defective products and force to reject；
Step 7, battery core combo are first according to battery core V4-V3 bounce voltages difference and carry out stepping, are carried out according still further to discharge capacity Q
Final stepping.
2d~7d standing step is further comprises between described step 1 and step 2.
Also include 3h~48h standing step between described step 3 and step 4.
The first given threshold in described step 3 is as follows by the different spans difference of battery core state-of-charge：
Between 80%SOC~100%SOC and during 0%SOC~19%SOC, the first given threshold scope 10mV~
Between 500mV；During 20%SOC~79%SOC, the first given threshold scope is in 15mV~800mV.
Setting state-of-charge scope in described step 4 is between 0%SOC~10%SOC.
Setting multiplying power in described step 4 is between 0.2C~3C.
Upper voltage limit value scope in described step 4 between 2.8V~4.3V, lower voltage limit value scope 1.5V~
Between 3.0V.
Time range is shelved in 10min~60min in described step 4.
The second given threshold scope in described step 6 is between 0~10mV.
Bounce voltage V4 steppings extreme difference in described step 7 is no more than 5mV~20mV, and discharge capacity Q extreme differences are no more than
10%.
Compared with prior art, the present invention has advantages below：
1) safe, the inventive method carries out emphasis screening for retired battery core security, sets two in the method
The safe determination step in road, it is ensured that the battery core of circulation to terminal is all safe；
2) easy to operate, the charging state of battery core is 0%SOC~10%SOC during the inventive method stepping, in lithium ion battery
Especially in LiFePO4 system, the charging state is easy to judge in SOC-OCV curves in downstream position；
3) retired battery modules uniformity is to extend the critical index of its service life, and polarization resistance is reaction cell
Electrical property consistency critical index.Bounce voltage can truly reflect the polarization resistance of battery core, present invention side efficiently and very much
Method is very uniquely using critical index of the bounce voltage of 0%SOC~10%SOC charging state battery cores as stepping, and this is to dynamic
Power battery echelon plays critical effect using screening and combo.
Brief description of the drawings
Fig. 1 is the flow chart of the present invention；
Fig. 2 is that the string module of A7 shelves of embodiment of the present invention battery core assembling 12 carries out 1C charge-discharge test curve maps.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is the part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example is applied, should all belong to the scope of protection of the invention.
As shown in figure 1, the power battery core echelon of the present invention, using method for group matching is screened, specific implementation is as follows：
The quiescent voltage V1 of battery core is split in step 1, the retired system of measurement and is recorded；
After step 2, standing 5d, then to splitting the quiescent voltage V2 of battery core in the retired system of measurement and recording；
Step 3, safe judgement carried out according to V1-V2, this criterion be V1-V2 ＜ 10mV, is normally circulated, as a result
As shown in table 1.
Table 1
Step 4, for battery core after security filtering according to 0.3C carry out constant-current discharge to 2.5V, 30min is shelved, according to 0.3C
Constant-current charge is carried out to 3.65V, 30min is shelved, carries out constant-current discharge to 2.5V (0%SOC) according to 0.3C, and record electric discharge and hold
Measure Q and quiescent voltage V3；
Step 5, regulation charging state battery core carry out quiescent voltage measurement and record V4；
Step 6, V4-V3 ＞ 5mV normally circulate, and are otherwise judged as safe defective products and force to reject, as shown in table 2；
Table 2
It is stepping that step 7, battery core combo, which are first according to battery core V4-V3 bounce voltage differences 20mV, according still further to discharge capacity Q poles
Poor 10% carries out final stepping, and specific stepping result is as shown in table 3：
Table 3
The module that 12 strings are assembled into for A7 shelves battery cores carries out 1C charge-discharge tests, idiographic flow：
1st, 10min is shelved；2nd, 1C constant-current discharges are to 2.5V；3rd, 30min is shelved；4th, 1C constant-current charges are to 3.55V；5th, test
Terminate.The charging and discharging curve of test is smooth and concentrates, and shows the module uniformity preferably (specific curve is shown in Fig. 2).
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replaced
Change, these modifications or substitutions should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain be defined.
Claims (10)
1. a kind of power battery core echelon utilizes and screens method for group matching, it is characterised in that comprises the following steps：
Step 1, the battery core to fractionation carry out quiescent voltage measurement and record V1；
Step 2, the battery core to fractionation carry out quiescent voltage measurement and record V2；
Step 3, the given thresholds of V1-V2 ＜ first, step 4 is performed, be otherwise judged as safe defective products and force to reject；
Step 4, for battery core after security filtering constant-current discharge is carried out to lower voltage limit value according to setting multiplying power, shelved, according to setting
Determine multiplying power and carry out constant-current charge to upper voltage limit value, shelve, constant-current discharge is carried out to setting state-of-charge according to setting multiplying power, and
Record discharge capacity Q and quiescent voltage V3；
Step 5, setting state-of-charge carry out bounce voltage measurement to battery core and record V4；
Step 6, the given thresholds of V4-V3 ＞ second, step 7 is performed, be otherwise judged as safe defective products and force to reject；
Step 7, battery core combo are first according to battery core V4-V3 bounce voltages difference and carry out stepping, are carried out according still further to discharge capacity Q final
Stepping.
2. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
2d~7d standing step is further comprises between rapid 1 and step 2.
3. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
Also include 3h~48h standing step between rapid 3 and step 4.
4. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
The first given threshold in rapid 3 is as follows by the different spans difference of battery core state-of-charge：
Between 80%SOC~100%SOC and during 0%SOC~19%SOC, the first given threshold scope 10mV~500mV it
Between；During 20%SOC~79%SOC, the first given threshold scope is in 15mV~800mV.
5. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
Setting state-of-charge scope in rapid 4 is between 0%SOC~10%SOC.
6. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
Setting multiplying power in rapid 4 is between 0.2C~3C.
7. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
Upper voltage limit value scope in rapid 4 is between 2.8V~4.3V, and lower voltage limit value scope is between 1.5V~3.0V.
8. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
Time range is shelved in 10min~60min in rapid 4.
9. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described step
The second given threshold scope in rapid 6 is between 0~10mV.
10. a kind of power battery core echelon according to claim 1, which utilizes, screens method for group matching, it is characterised in that described
Bounce voltage V4 steppings extreme difference in step 7 is no more than 5mV~20mV, and discharge capacity Q extreme differences are no more than 10%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354897A (en) * | 2020-07-22 | 2021-02-12 | 万向一二三股份公司 | Screening method for cell consistency in practical application process of lithium ion battery |
| CN113210299A (en) * | 2021-03-31 | 2021-08-06 | 深圳供电局有限公司 | Battery pack sorting method, apparatus, computer device and storage medium |
| CN113369176A (en) * | 2021-06-13 | 2021-09-10 | 广州菲利斯太阳能科技有限公司 | Sorting method and system for recycling retired batteries |
| WO2022185757A1 (en) * | 2021-03-04 | 2022-09-09 | 株式会社カネカ | Method for manufacturing battery pack |
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| CN102760907A (en) * | 2011-04-29 | 2012-10-31 | 广州丰江电池新技术股份有限公司 | Method for assembling rechargeable lithium battery pack |
| CN103901353A (en) * | 2014-04-17 | 2014-07-02 | 广州丰江电池新技术股份有限公司 | Method for judging uniformity of all batteries of lithium ion battery pack and timing voltage measuring instrument |
| CN104617342A (en) * | 2015-01-21 | 2015-05-13 | 合肥国轩高科动力能源股份公司 | Lithium iron phosphate power battery grouping method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354897A (en) * | 2020-07-22 | 2021-02-12 | 万向一二三股份公司 | Screening method for cell consistency in practical application process of lithium ion battery |
| CN112354897B (en) * | 2020-07-22 | 2022-04-12 | 万向一二三股份公司 | Screening method for cell consistency in practical application process of lithium ion battery |
| WO2022185757A1 (en) * | 2021-03-04 | 2022-09-09 | 株式会社カネカ | Method for manufacturing battery pack |
| CN113210299A (en) * | 2021-03-31 | 2021-08-06 | 深圳供电局有限公司 | Battery pack sorting method, apparatus, computer device and storage medium |
| CN113210299B (en) * | 2021-03-31 | 2023-01-24 | 深圳供电局有限公司 | Battery pack sorting method, apparatus, computer device and storage medium |
| CN113369176A (en) * | 2021-06-13 | 2021-09-10 | 广州菲利斯太阳能科技有限公司 | Sorting method and system for recycling retired batteries |
| CN113369176B (en) * | 2021-06-13 | 2023-02-28 | 广州菲利斯太阳能科技有限公司 | Sorting method and system for recycling retired batteries |
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Application publication date: 20171212 |
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