CN107755294A - The screening technique of retired electrokinetic cell bag - Google Patents
The screening technique of retired electrokinetic cell bag Download PDFInfo
- Publication number
- CN107755294A CN107755294A CN201710873898.7A CN201710873898A CN107755294A CN 107755294 A CN107755294 A CN 107755294A CN 201710873898 A CN201710873898 A CN 201710873898A CN 107755294 A CN107755294 A CN 107755294A
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- Prior art keywords
- battery bag
- frequency
- bag
- battery
- electrokinetic cell
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012216 screening Methods 0.000 title claims abstract description 16
- 230000036541 health Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 230000015556 catabolic process Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- 230000007717 exclusion Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 238000000157 electrochemical-induced impedance spectroscopy Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses the screening technique of retired electrokinetic cell bag, including：Step 1, under battery bag open-circuit condition or during discharge and recharge, the curtage disturbance of frequency is loaded with the both positive and negative polarity of battery bag；Step 2, measurement obtains each impedance Z when subscribing frequency；Step 3, each impedance Z foundation is obtained by measuringCalculate RctAnd Ro；Wherein：RctIt is the charge transfer resistance of battery bag；CdlIt is the electric double layer capacitance of battery bag；RoIt is the summation of all pure Ohmic resistances in battery bag and measuring system；F is frequency, and ω is the π f of radial frequency and ω=2；J is 1 square root；Step 4, R is passed throughctAnd RoPredict the general level of the health and residual life of battery bag.It has the following advantages that：It can simply and quickly screen, differentiate, combining retired electrokinetic cell, for and can during battery echelon utilizes, the general level of the health and life-span to battery bag make rational diagnosis.
Description
Technical field
The present invention relates to a kind of electrokinetic cell packet technology field, more particularly to a kind of screening side of retired electrokinetic cell bag
Method.
Background technology
The general level of the health (SOH) of retired electrokinetic cell bag can be because of vehicle running history, maintenance, storage condition and difference.It is more
The retired electrokinetic cell bag of number lacks usage record, makes echelon difficult using carrying out.Current popular authentication method is：By filling entirely
It is complete to put metering ampere-hour number (Ah), contrast the ampere-hour number on the ampere-hour number (Ah) and making product nameplate of metering and provide the contrast.The party
Method there are following deficiency：1st, measurement accuracy is low；2nd, it need to take considerable time and manpower, and required plant area and set
It is standby, the prospect without large-scale application.Therefore one kind is needed in industry can simply and quickly screen, differentiate, combine it is retired
The method of electrokinetic cell.
The content of the invention
The invention provides the screening technique of retired electrokinetic cell bag, which overcomes retired electrokinetic cell bag in background technology
Screening technique present in deficiency.
The present invention solve its technical problem used technical scheme be：
The screening technique of retired electrokinetic cell bag, including：
Step 1, under battery bag open-circuit condition or during discharge and recharge, the electric current of frequency is loaded with the both positive and negative polarity of battery bag
Or voltage disturbance；
Step 2, measurement obtains each impedance Z when subscribing frequency；
Step 3, each impedance Z foundation is obtained by measuringCalculate RctAnd Ro；Wherein：RctIt is electricity
Chi Bao charge transfer resistance；CdlIt is the electric double layer capacitance of battery bag；RoIt is all pure ohm electricity in battery bag and measuring system
The summation of resistance；F is frequency, and ω is the π f of radial frequency and ω=2；J is -1 square root；
Step 4, R is passed throughctAnd RoPredict the general level of the health and residual life of battery bag.
Among one embodiment：In the step 2, at least measurement obtains high-frequency and low-frequency impedance Z；In high-frequency,
Cdl->∞, high-frequency Z ≈ Ro；In low frequency, Cdl->0, Z ≈ Rct+Ro。
Among one embodiment：Also include before the step 1：
Step 11, the open-circuit voltage of battery bag is detected, and recorded on the open-circuit voltage and battery bag nameplate for judging to detect
Whether open-circuit voltage is consistent, and step 12 is performed if consistent；
Step 12, battery bag connection load, and detect whether battery bag carries out discharge and recharge, performed if discharge and recharge is carried out
Step 1.
Among one embodiment：The step 4 includes：
Step 41, battery packages are networked to run；
Step 42, R is passed throughctAnd RoPredict the general level of the health and residual life of battery bag；
Step 43, whether detection battery bag needs Breakdown Maintenance, fixes a breakdown if necessary and performs step 41, otherwise
Perform step 44；
Step 44, judge whether battery bag meets economic model, step 41 is performed if meeting.
Among one embodiment：Battery bag or recycling battery bag, the step 12 are repaired in the step 11 if inconsistent
In as without carry out discharge and recharge if repair battery bag or recycling battery bag.
Among one embodiment：In the step 43 battery bag is recycled if failure does not exclude；In the step 44 such as
Fruit is unsatisfactory for economic model and then recycles battery bag.
Compared with background technology, it has the following advantages that the technical program：
Measurement obtains each impedance Z when subscribing frequency, and R is calculated by measuring each impedance Z of acquisitionctAnd Ro, pass through RctWith
RoThe general level of the health and residual life of battery bag are predicted, can simply and quickly screen, differentiate, combining retired electrokinetic cell, again
Can be during battery echelon utilize, the general level of the health and life-span to battery bag make rational diagnosis, while can combine
The business model that echelon utilizes, the residual life (remaining useful life, RUL) of battery bag is maked decision, also carried
Theoretical foundation is supplied.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the precircuit of the simplification of battery bag.
Fig. 2 is being schemed using Nyquist for the impedance of battery bag.
Embodiment
The screening technique of retired electrokinetic cell bag, including：
Step 11, the open-circuit voltage of battery bag is detected, and recorded on the open-circuit voltage and battery bag nameplate for judging to detect
Whether open-circuit voltage is consistent, and step 12 is performed if consistent, and battery bag or recycling battery bag are repaired if inconsistent；
Step 12, battery bag connection load, and detect whether battery bag carries out discharge and recharge, performed if discharge and recharge is carried out
Step 1, battery bag or recycling battery bag are repaired if without discharge and recharge is carried out；
Step 1, under the open-circuit condition of battery bag or during discharge and recharge, the electricity to being loaded with frequency on the both positive and negative polarity of battery bag
Stream or voltage disturbance；And record the relevant voltage or curent change of output；As needed：Wherein, current disturbing can be to hand over
Stream or direct current property；The perturbation amplitude of voltage or electric current can be the 0.001-50% of battery bag nominal value；
Step 2, each impedance Z when subscribing frequency is obtained by voltage caused by disturbance or curent change, measurement；
Step 3, each impedance Z foundation is obtained by measuringCalculate RctAnd Ro；Wherein：RctIt is electricity
Chi Bao charge transfer resistance；CdlIt is the electric double layer capacitance of battery bag；RoIt is all pure ohm electricity in battery bag and measuring system
The summation of resistance；F is frequency, and ω is the π f of radial frequency and ω=2；J is -1 square root；
Step 4, R is passed throughctAnd RoThe general level of the health and residual life of battery bag are predicted, specifically, the step 4 is wrapped
Include：
Step 41, battery packages are networked to run；
Step 42, R is passed throughctAnd RoPredict the general level of the health and residual life of battery bag；
Step 43, whether detection battery bag needs Breakdown Maintenance, fixes a breakdown if necessary and performs step 41, otherwise
Step 44 is performed, battery bag is recycled if failure does not exclude；
Step 44, judge whether battery bag meets that echelon utilizes the economic model in power station, step 41 performed if meeting,
Battery bag is recycled in the step 44 if economic model is unsatisfactory for.
Among present embodiment：In the step 2, at least measurement obtains high-frequency and low-frequency impedance Z；In high frequency
During rate, Cdl->∞, high-frequency Z ≈ Ro；In low frequency, Cdl->0, Z ≈ Rct+Ro。
Among present embodiment, screening technique is using electrochemical analysis (electrochemical
Impedance spectroscopy, abbreviation EIS), it is a kind of nondestructive battery core analysis method.The principle of test is：
Under battery bag open-circuit condition or during discharge and recharge, the curtage disturbance of frequency, disturbance are loaded with the both positive and negative polarity of battery core
The relative displacement of caused curtage is relevant with each impedance components of battery core.And the numerical value of each impedance can be with battery core
Age and change, so as to provide the foundation to battery core life assessment.
The precircuit of the simplification of battery bag is as shown in figure 1, RctIt is the charge transfer resistance (charge of whole battery bag
Transfer resistance), represent in Lithium-ion embeding in the resistance of electrode surface electric charge transfer；CdlIt is battery bag
Electric double layer capacitance (electrical double-layer capacitance), this capacitance behavior is due near electrode
Ion and electronics separation caused by；RoIt is Ohmic resistance (Ohmic resistance), represents system and the survey of battery bag
The summation of all pure Ohmic resistances in amount system.Wherein：Because each battery bag includes multiple battery cores being connected with connection in series-parallel, and
And each battery core has the parameter of anode and negative electrode, present embodiment processing mode is by all battery core anode and cathode parameter conjunctions
And depending on battery bag it is one " big battery core ".When EIS forcing frequency is in middle high scope, the model of the above is to set up.More than
Parameter can be in nonlinear increase in cell degradation.Therefore clarification cell degradation and Rct、Cdl, and RoRelation pair screening power
Battery bag, estimation SOH and prediction RUL are most important.
Fig. 2 is being schemed using Nyquist for the impedance of battery bag, and this is also the concrete embodiment of EIS.Wherein ordinate is
The imaginary part of impedance Z；Abscissa is the real part of impedance Z.Each point on curve is the measured value of impedance under different forcing frequencies.
In Fig. 2：In A points, because frequency is very big, Cdl->∞,Z≈Ro；In B points, because frequency very little, Cdl->0, Z ≈ Rct
+Ro.Therefore, by analyzing impedance at different frequencies, the charge transfer resistance R of some battery bag can quantitatively be determinedct
With Ohmic resistance Ro, and the general level of the health SOH and residual life RUL of battery bag are predicted with this indirectly.Wherein：Because impedance,
Resistance gradually rises with the use of battery bag, and EIS scannings can obtain required battery bag life parameter in a short time,
If the business model that battery echelon is utilized is taken into account, it may be determined that the residual life of battery bag, and help to make in time
Safeguard or carry out the decision that the 3rd echelon utilizes.
It is described above, only present pre-ferred embodiments, therefore the scope that the present invention is implemented can not be limited according to this, i.e., according to
The equivalent changes and modifications that the scope of the claims of the present invention and description are made, all should still it belong in the range of the present invention covers.
Claims (6)
1. the screening technique of retired electrokinetic cell bag, it is characterised in that：Including：
Step 1, under battery bag open-circuit condition or during discharge and recharge, the electric current or electricity of frequency are loaded with the both positive and negative polarity of battery bag
Pressure disturbance；
Step 2, measurement obtains each impedance Z when subscribing frequency；
Step 3, each impedance Z foundation is obtained by measuringCalculate RctAnd Ro；Wherein：RctIt is battery bag
Charge transfer resistance；CdlIt is the electric double layer capacitance of battery bag；RoIt is all pure Ohmic resistances in battery bag and measuring system
Summation；F is frequency, and ω is the π f of radial frequency and ω=2；J is -1 square root；
Step 4, R is passed throughctAnd RoPredict the general level of the health and residual life of battery bag.
2. the screening technique of retired electrokinetic cell bag according to claim 1, it is characterised in that：In the step 2, at least survey
Amount obtains high-frequency and low-frequency impedance Z；In high-frequency, Cdl->∞, high-frequency Z ≈ Ro；In low frequency, Cdl->0, Z
≈Rct+Ro。
3. the screening technique of retired electrokinetic cell bag according to claim 1, it is characterised in that：Also wrapped before the step 1
Include：
Step 11, the open-circuit voltage of battery bag is detected, and the open circuit recorded on the open-circuit voltage and battery bag nameplate for judging to detect
Whether voltage is consistent, and step 12 is performed if consistent；
Step 12, battery bag connection load, and detect whether battery bag carries out discharge and recharge, perform step if discharge and recharge is carried out
1。
4. the screening technique of the retired electrokinetic cell bag according to claim 1 or 2 or 3, it is characterised in that：The step 4 is wrapped
Include：
Step 41, battery packages are networked to run；
Step 42, R is passed throughctAnd RoPredict the general level of the health and residual life of battery bag；
Step 43, whether detection battery bag needs Breakdown Maintenance, fixes a breakdown if necessary and performs step 41, otherwise performs
Step 44；
Step 44, judge whether battery bag meets economic model, step 41 is performed if meeting.
5. the screening technique of retired electrokinetic cell bag according to claim 4, it is characterised in that：Such as differ in the step 11
Cause then to repair battery bag or recycling battery bag, repaired in the step 12 if without discharge and recharge is carried out at battery bag or recovery
Manage battery bag.
6. the screening technique of retired electrokinetic cell bag according to claim 4, it is characterised in that：If event in the step 43
Barrier then recycles battery bag without exclusion；Battery bag is recycled in the step 44 if economic model is unsatisfactory for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873898.7A CN107755294A (en) | 2017-09-25 | 2017-09-25 | The screening technique of retired electrokinetic cell bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873898.7A CN107755294A (en) | 2017-09-25 | 2017-09-25 | The screening technique of retired electrokinetic cell bag |
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| Publication Number | Publication Date |
|---|---|
| CN107755294A true CN107755294A (en) | 2018-03-06 |
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ID=61267688
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| CN201710873898.7A Pending CN107755294A (en) | 2017-09-25 | 2017-09-25 | The screening technique of retired electrokinetic cell bag |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534826A (en) * | 2019-08-18 | 2019-12-03 | 浙江万马新能源有限公司 | It is a kind of to utilize battery technology using big data combo echelon |
| CN111790645A (en) * | 2020-06-18 | 2020-10-20 | 杭州意能电力技术有限公司 | Method for sorting power batteries by gradient utilization |
| CN114535112A (en) * | 2022-01-10 | 2022-05-27 | 西安理工大学 | Electric automobile retired battery sorting robot system |
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| CN107076801A (en) * | 2014-07-25 | 2017-08-18 | 锂平衡公司 | Electrochemical impedance spectroscopy in battery management system |
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Patent Citations (6)
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| JP2011216328A (en) * | 2010-03-31 | 2011-10-27 | Primearth Ev Energy Co Ltd | Method for reusing secondary battery |
| CN102466766A (en) * | 2010-10-28 | 2012-05-23 | Nxp股份有限公司 | Spectroscopic battery-cell-impedance measurement arrangement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534826A (en) * | 2019-08-18 | 2019-12-03 | 浙江万马新能源有限公司 | It is a kind of to utilize battery technology using big data combo echelon |
| CN111790645A (en) * | 2020-06-18 | 2020-10-20 | 杭州意能电力技术有限公司 | Method for sorting power batteries by gradient utilization |
| CN114535112A (en) * | 2022-01-10 | 2022-05-27 | 西安理工大学 | Electric automobile retired battery sorting robot system |
| CN114535112B (en) * | 2022-01-10 | 2024-04-12 | 西安理工大学 | Electric automobile retired battery sorting robot system |
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Application publication date: 20180306 |