CN106180002A - A kind of battery screening method utilized for echelon - Google Patents
A kind of battery screening method utilized for echelon Download PDFInfo
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- CN106180002A CN106180002A CN201610539982.0A CN201610539982A CN106180002A CN 106180002 A CN106180002 A CN 106180002A CN 201610539982 A CN201610539982 A CN 201610539982A CN 106180002 A CN106180002 A CN 106180002A
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- discharge
- apparent resistance
- cell
- echelon
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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
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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
- B07C2301/00—Sorting according to destination
- B07C2301/0008—Electronic Devices, e.g. keyboard, displays
Abstract
The invention discloses a kind of battery screening method utilized for echelon, including: cell is charged to the first depth of discharge；Under multiple charge-discharge magnifications, described battery is carried out discharge and recharge, and calculates the apparent resistance value under multiple charge-discharge magnification；Apparent resistance coefficient of determination is obtained according to the apparent resistance value under the plurality of charge-discharge magnification；According to described apparent resistance coefficient of determination, determine that described cell is the most qualified.Step of the present invention and used equipment are simple, and employing is typically filled with discharge equipment and can realize, and therefore use extremely low cost just can complete primary election to reclaiming electrokinetic cell, also can select sorting as requested, or the most selected.Comparing by the way of discharge and recharge partial volume with traditional, the present invention has only to several seconds discharge and recharge operation, can complete, method more low-carbon (LC), and energy consumption is lower, in large-scale use, can obtain considerable economic worth.
Description
Technical field
The present invention relates to cell art, carry out battery screening particularly in the echelon utilization of a kind of electrokinetic cell
Method.
Background technology
Along with the development of society, the application of lithium ion battery is more extensive, especially in the application of electric automobile.Mesh
Front battery acquisition price is higher is one of key factor limiting electric automobile popularization, and the utilization of battery echelon is to be expected to reduce electricity
The important means of electrical automobile electrokinetic cell use cost.Utilize by carrying out electrokinetic cell echelon, the use of battery can be excavated
It is worth, effectively reduces the battery cost in electric automobile operational phase.
Wherein, echelon utilizes and refers to that some the most used product has reached primary projected life, then by it
His method makes the process that is continuing with that its function is completely or partially recovered, and this process belongs to the basic at the same level or side of degradation application
Formula.
It is generally believed that when less than the 80% of Vehicular dynamic battery capacity attenuation to initial capacity, because of continuation of the journey of once charging
Mileage (simultaneously the power capability of battery also have a greatly reduced quality) is obviously reduced, it is meant that the end of the vehicle-mounted mission of Vehicular dynamic battery
Knot.But for stored energy application less demanding for specific energy, electrokinetic cell still has bigger use value, by echelon profit
With, it is possible not only to allow electrokinetic cell performance be fully played, also helps the use cost reducing battery.
Therefore, it can, in the different lifetime stage of battery, carry out different uses, as power use, energy storage peak load shifting
Use, uninterrupted power source or other uses etc..So fully improve battery utilization rate, thus reduce the usage charges of incipient stage
With.
In prior art, when electrokinetic cell carries out echelon utilization analysis, it is mostly to utilize industry CT Non-Destructive Testing and three-dimensional
Imaging technique, its subject matter is, needs to utilize the main equipments such as nuclear magnetic resonance imaging instrument and precision instrument to inside battery
Detecting, a lot of producers do not possess this testing conditions, and testing cost is the highest.
Summary of the invention
It is an object of the invention to provide a kind of battery screening method utilized for echelon, complete power current at lower cost
Preliminary screening in the removal process of pond.
The invention provides a kind of battery screening method utilized for echelon, including:
Cell is charged to the first depth of discharge；
Under multiple charge-discharge magnifications, described battery is carried out discharge and recharge, and calculate under multiple charge-discharge magnification apparent
Resistance value；
Apparent resistance coefficient of determination is obtained according to the apparent resistance value under the plurality of charge-discharge magnification；
According to described apparent resistance coefficient of determination, determine that described cell is the most qualified.
Further, described cell be reclaim after treat the cell that secondary utilizes.
Further, described first depth of discharge is the 40%～60% of described cell rated capacity.
Further, described charge-discharge magnification is 0.1C～1C.
Further, the plurality of charge-discharge magnification includes: 0.1C, 0.2C, 0.3C, 0.4C, 0.5C, 0.6C, 0.7C,
0.8C, 0.9C and 1C.
Further, described battery is carried out the time of discharge and recharge less than 1 minute.
Further, described apparent resistance value is obtained by following formula:
Wherein, R is described apparent resistance value, U1For the running voltage of described cell, U0For opening of described cell
Road voltage, I is the electric current that described cell carries out discharge and recharge.
Further, obtain apparent resistance coefficient of determination according to the apparent resistance value under the plurality of charge-discharge magnification, including:
Apparent resistance value under the plurality of charge-discharge magnification is carried out linear fit, and obtains the matching of this linear fit
Degree R2；
Using the degree of fitting R2 of this linear fit as described apparent resistance coefficient of determination.
Further, according to described apparent resistance coefficient of determination, determine that described cell is the most qualified, including:
Set decision threshold, if described apparent resistance coefficient of determination closes not less than described decision threshold, described cell
Lattice.
Further, set decision threshold as 0.95, if described apparent resistance coefficient of determination is not less than 0.95, described monomer
Battery is qualified, and the most described cell is defective；
Or,
Set the first decision threshold as the 0.95, second decision threshold as 0.9, if described apparent resistance coefficient of determination is not less than
0.95 described cell first kind is qualified, if described apparent resistance coefficient of determination is not less than 0.9 and less than 0.95, described
Cell Equations of The Second Kind is qualified, and the most described cell is defective.
From such scheme it can be seen that the battery screening method utilized for echelon of the present invention, step and being used
Equipment is simple, and employing is typically filled with discharge equipment and can realize, and therefore uses extremely low cost just can complete reclaiming electrokinetic cell
Primary election, also can select sorting as requested, or the most selected.With traditional by the way of discharge and recharge partial volume
Comparing, the present invention has only to several seconds discharge and recharge operation, can complete, and method more low-carbon (LC), energy consumption is lower, in large-scale use
In, considerable economic worth can be obtained.
Accompanying drawing explanation
The present invention is only schematically illustrated and explains by the following drawings, not delimit the scope of the invention.
Fig. 1 is the embodiment flow chart of the battery screening method that the present invention utilizes for echelon；
Fig. 2 is the curve chart that in the embodiment of the present invention one, the apparent resistance of cell carries out fitting a straight line；
Fig. 3 is the curve chart that in the embodiment of the present invention two, the apparent resistance of cell carries out fitting a straight line.
Detailed description of the invention
In order to technical characteristic, purpose and the effect of invention are more clearly understood from, the now comparison accompanying drawing explanation present invention
Detailed description of the invention, the most identical label represents identical part.
In this article, " schematically " expression " serves as example, example or explanation ", " should not show being described herein as
Meaning property " any diagram, embodiment be construed to a kind of preferred or more advantage technical scheme.
For making simplified form, each figure only schematically show part related to the present invention, and do not represent it
Practical structures as product.It addition, so that simplified form readily appreciates, some figure has the portion of identical structure or function
Part, only symbolically depicts one of them, or has only marked one of them.
In this article, " one " is not offered as the quantity of relevant portion of the present invention being limited to " only this ", and " one
Individual " do not indicate that the situation of the quantity " more than one " getting rid of relevant portion of the present invention.
In this article, " first ", " second " etc. are only used for differentiation each other, rather than represent significance level and order and
The premise etc. existed each other.
In this article, the restriction on the mathematics of the also non-critical such as " equal ", " identical " and/or geometry meaning, also comprise
The error that it will be appreciated by those skilled in the art that and manufacture or use etc. allow.Except as otherwise noted, numerical value model herein
Enclose the gamut not only including in two end points, also include being contained in some subranges therein.
As it is shown in figure 1, the battery screening method utilized for echelon of the embodiment of the present invention, comprise the following steps:
Step 1, cell is charged to the first depth of discharge；
Step 2, under multiple charge-discharge magnifications, described battery is carried out discharge and recharge, and calculates under multiple charge-discharge magnification
Apparent resistance value；
Step 3, according under the plurality of charge-discharge magnification apparent resistance value obtain apparent resistance coefficient of determination；
Step 4, according to described apparent resistance coefficient of determination, determine that described cell is the most qualified.
Wherein, described cell be reclaim after treat the cell that secondary utilizes.
Hereinafter, in conjunction with specific embodiments the battery screening method for echelon utilization of the present invention is described in detail.
First, reclaim set of cells, and the set of cells after reclaiming disassembled as cell, after disassembling to treat secondary profit
Cell charge to the first depth of discharge, wherein, described first depth of discharge is described cell rated capacity
40%～60%, it is therefore preferable to the 50% of described cell rated capacity.
Afterwards, under multiple charge-discharge magnifications, described cell is carried out discharge and recharge, and calculates multiple charge-discharge magnification
Under the apparent resistance value of cell.Wherein, the set point of described charge-discharge magnification is 0.1C～1C, the embodiment of the present invention
In, be that charge-discharge magnification is 10 altogether, respectively 0.1C, 0.2C, 0.3C, 0.4C, 0.5C, 0.6C, 0.7C, 0.8C, 0.9C and
1C.Wherein, charge-discharge magnification refers to that current value required during its rated capacity released within the time of regulation by battery, and it is counting
According to the upper multiple equal to battery rated capacity of value, represent with letter C.In the embodiment of the present invention, cell is filled every time
The time of electric discharge less than 1 minute, preferably 10 seconds.
Calculating the apparent resistance value under multiple charge-discharge magnification, described apparent resistance value is obtained by following formula:
Wherein, R is described apparent resistance value, U1For the running voltage of described cell, U0For opening of described cell
Road voltage, I is the electric current that described cell carries out discharge and recharge, wherein, U1、U0With I, cell is being carried out discharge and recharge
During measure obtain.
Afterwards, apparent resistance coefficient of determination is obtained according to the apparent resistance value under the plurality of charge-discharge magnification.Apparent electricity
Resistance coefficient of determination is obtained by statistic law method, specifically includes:
Apparent resistance value under the plurality of charge-discharge magnification is carried out linear fit, and obtains the matching of this linear fit
Degree R2；By the degree of fitting R of this linear fit2As described apparent resistance coefficient of determination.
Wherein, R2Refer to the regression straight line fitting degree to observation, R2Span be [0,1], R2Value closer to
1, illustrate that regression straight line is the best to the fitting degree of observation, R2Value closer to 0, the regression straight line matching to observation is described
Degree is the poorest.
Afterwards, according to described apparent resistance coefficient of determination, determine that described cell is the most qualified, specifically include: set
Decision threshold, if described apparent resistance coefficient of determination (i.e. R2) qualified not less than the most described cell of described decision threshold.
Wherein, as specific embodiment, decision threshold can be set as 0.95, if described apparent resistance coefficient of determination is not less than
0.95 described cell is qualified, and the most described cell is defective；Or, can set the first decision threshold as 0.95,
Second decision threshold is 0.9, if described apparent resistance coefficient of determination is not less than 0.95, the described cell first kind is qualified, if
Described apparent resistance coefficient of determination not less than 0.9 and less than 0.95 described cell Equations of The Second Kind qualified, the most described monomer
Battery is defective.Certainly, it is determined that the setting of threshold value need to be set according to the demand that battery echelon utilizes, and is not only limited to this
Setting in bright.
Hereinafter, the several specific embodiments for the present invention are applied.
Embodiment one
Reclaiming set of cells and disassemble out 203 cells, each cell capacity is 120Ah (ampere-hour).All monomers
Battery both be charged to 50%DOD (Depth Of Discharge, depth of discharge).According to putting of point 10 numerical value such as 0.1C to 1C
Electricity multiplying power, charges 10 seconds.Coefficient of determination i.e. R with apparent resistance2>=0.95 judges whether to meet the requirements.
The test data of one of them cell such as table 1:
Table 1: the test data of embodiment one
| Discharge-rate | Open-circuit voltage | Running voltage | Apparent resistance |
| 0.1 | 3.305 | 3.391 | 7.201 |
| 0.2 | 3.305 | 3.494 | 7.201 |
| 0.3 | 3.305 | 3.589 | 7.203 |
| 0.4 | 3.305 | 3.688 | 7.205 |
| 0.5 | 3.305 | 3.779 | 7.208 |
| 0.6 | 3.305 | 3.869 | 7.209 |
| 0.7 | 3.305 | 3.966 | 7.209 |
| 0.8 | 3.305 | 4.072 | 7.210 |
| 0.9 | 3.305 | 4.159 | 7.212 |
| 1 | 3.305 | 4.252 | 7.215 |
Using the discharge-rate in table 1 as abscissa, apparent resistance is vertical coordinate, obtains apparent resistance and becomes with discharge-rate
Change figure, as in figure 2 it is shown, and carry out fitting a straight line, and then acquisition R2Value is 0.9637, this R2Value is more than decision threshold 0.95, and then
Judge that this sheet cell is qualified.
Embodiment two
Reclaiming set of cells and disassemble out 203 cells, each cell capacity is 120Ah (ampere-hour).All monomers
Battery both be charged to 50%DOD (Depth Of Discharge, depth of discharge).According to putting of point 10 numerical value such as 0.1C to 1C
Electricity multiplying power, charges 10 seconds.Coefficient of determination i.e. R with apparent resistance2>=0.95 judges whether to meet the requirements.
The test data of other in which cell such as table 2:
Table 2: the test data of embodiment two
Using the discharge-rate in table 2 as abscissa, apparent resistance is vertical coordinate, obtains apparent resistance and becomes with discharge-rate
Change figure, as it is shown on figure 3, and carry out fitting a straight line, and then acquisition R2Value is 0.733, this R2Value is less than decision threshold 0.95, and then
Judge that this sheet cell is defective.
Embodiment three
Reclaiming set of cells and disassemble out 203 cells, each cell capacity is 120Ah (ampere-hour).All monomers
Battery both be charged to 50%DOD (Depth Of Discharge, depth of discharge).According to putting of point 10 numerical value such as 0.1C to 1C
Electricity multiplying power, discharges 10 seconds.Coefficient of determination R with apparent resistance2>=0.95 is judged to that the first kind is qualified, with 0.9 >=R2>0.95
Qualified for Equations of The Second Kind, all 203 cells are screened, result such as table 3.
Table 3: the selection result of 203 cells of embodiment three
Add up this 203 cells, first kind qualified clusters (excellent group) 78, Equations of The Second Kind qualified clusters (general group) 52
Sheet, defective group 73.
The battery screening method utilized for echelon of the present invention, step and used equipment are simple, and employing is typically filled with
Discharge equipment can realize, and therefore uses extremely low cost just can complete primary election to reclaiming electrokinetic cell, also can as requested, can
To have selected sorting or the most selected.Comparing by the way of discharge and recharge partial volume with traditional, the present invention has only to the several seconds
Clock discharge and recharge operates, and can complete, method more low-carbon (LC), and energy consumption is lower, in large-scale use, can obtain considerable economic valency
Value.
It is to be understood that, although this specification describes according to each embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed people in the art through appropriately combined as an entirety, the technical scheme in each embodiment
Member may be appreciated other embodiments.
The a series of detailed description of those listed above is only for the feasibility embodiment of the present invention specifically
Bright, and and be not used to limit the scope of the invention, all without departing from the skill of the present invention equivalent embodiments made of spirit or
Change, as feature combination, split or repeat, should be included within the scope of the present invention.
Claims (10)
1. the battery screening method utilized for echelon, including:
Cell is charged to the first depth of discharge；
Under multiple charge-discharge magnifications, described battery is carried out discharge and recharge, and calculates the apparent resistance under multiple charge-discharge magnification
Value；
Apparent resistance coefficient of determination is obtained according to the apparent resistance value under the plurality of charge-discharge magnification；
According to described apparent resistance coefficient of determination, determine that described cell is the most qualified.
The battery screening method utilized for echelon the most according to claim 1, it is characterised in that: described cell is
Treat, after recovery, the cell that secondary utilizes.
The battery screening method utilized for echelon the most according to claim 1, it is characterised in that:
Described first depth of discharge is the 40%～60% of described cell rated capacity.
The battery screening method utilized for echelon the most according to claim 1, it is characterised in that described charge-discharge magnification
For 0.1C～1C.
The battery screening method utilized for echelon the most according to claim 4, it is characterised in that the plurality of discharge and recharge
Multiplying power includes: 0.1C, 0.2C, 0.3C, 0.4C, 0.5C, 0.6C, 0.7C, 0.8C, 0.9C and 1C.
The battery screening method utilized for echelon the most according to claim 5, it is characterised in that described battery is carried out
The time of discharge and recharge is less than 1 minute.
The battery screening method utilized for echelon the most according to claim 1, it is characterised in that described apparent resistance value
Obtained by following formula:
Wherein, R is described apparent resistance value, U1For the running voltage of described cell, U0Open circuit electricity for described cell
Pressure, I is the electric current that described cell carries out discharge and recharge.
The battery screening method utilized for echelon the most according to claim 1, it is characterised in that fill according to the plurality of
Apparent resistance value under discharge-rate obtains apparent resistance coefficient of determination, including:
Apparent resistance value under the plurality of charge-discharge magnification is carried out linear fit, and obtains the degree of fitting R of this linear fit2；
By the degree of fitting R of this linear fit2As described apparent resistance coefficient of determination.
The battery screening method utilized for echelon the most according to claim 1, it is characterised in that according to described apparent electricity
Resistance coefficient of determination, determines that described cell is the most qualified, including:
Setting decision threshold, if described apparent resistance coefficient of determination is not less than described decision threshold, described cell is qualified.
The battery screening method utilized for echelon the most according to claim 9, it is characterised in that:
Setting decision threshold as 0.95, if described apparent resistance coefficient of determination is not less than 0.95, described cell is qualified, no
The most described cell is defective；
Or,
Set the first decision threshold as the 0.95, second decision threshold as 0.9, if described apparent resistance coefficient of determination is not less than 0.95
The most described cell first kind is qualified, if described apparent resistance coefficient of determination is not less than 0.9 and less than 0.95, and described monomer
Battery Equations of The Second Kind is qualified, and the most described cell is defective.
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| CN107247237A (en) * | 2017-05-26 | 2017-10-13 | 联想(北京)有限公司 | A kind of detection method of battery, electronic equipment and computer-readable recording medium |
| CN107755295A (en) * | 2017-10-19 | 2018-03-06 | 杭州电子科技大学 | A kind of lead-acid accumulator sorting technique based on charging and discharging curve |
| CN108598611A (en) * | 2018-04-20 | 2018-09-28 | 桑顿新能源科技有限公司 | A kind of retired battery can echelon utilize quick judgment method |
| CN109731808A (en) * | 2018-11-30 | 2019-05-10 | 天合光能股份有限公司 | The detection method for separating that a kind of pair of lithium battery echelon utilizes |
| CN113219355A (en) * | 2021-03-29 | 2021-08-06 | 安徽江淮汽车集团股份有限公司 | Battery type selection method, device, equipment and storage medium |
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| CN106180002B (en) | 2018-10-30 |
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Denomination of invention: Battery screening method for gradient utilization Effective date of registration: 20190513 Granted publication date: 20181030 Pledgee: Suzhou Trust Co., Ltd. Pledgor: BEIJING CHANGCHENG HUAGUAN AUTOMOBILE TECHNOLOGY CO., LTD. Registration number: 2019990000418 |