CN110548694A - rapid screening and grading method for retired battery module - Google Patents
rapid screening and grading method for retired battery module Download PDFInfo
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- CN110548694A CN110548694A CN201910722011.3A CN201910722011A CN110548694A CN 110548694 A CN110548694 A CN 110548694A CN 201910722011 A CN201910722011 A CN 201910722011A CN 110548694 A CN110548694 A CN 110548694A
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- battery modules
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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
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a rapid screening and grading method of a retired battery module, which comprises the following steps: screening the battery modules through appearance; carrying out charge and discharge tests on the battery module; grading the qualified batteries in the discharge test; and recombining the classified battery modules again for echelon utilization according to the grouping requirement. According to the invention, the purposes of screening and grading retired battery modules are realized only through one item of appearance detection and capacity test, the screening speed is increased, the screening cost is reduced, and the purpose of rapid screening is realized.
Description
Technical Field
The invention relates to the technical field of retired battery echelon utilization, in particular to a method for quickly screening and grading a retired battery module.
Background
The lithium ion power battery has the advantages of high energy density, high working voltage, high safety, long service life and the like, is a main power source of the electric automobile, in recent years, due to the support of policies, the electric automobile is in explosive growth, a large amount of waste lithium ion batteries with the residual capacity of 70-80% are retired in the future, if the batteries in retirement are directly scrapped, the waste of resources is greatly caused, the environment is greatly damaged, if the retired batteries are sorted and then are recycled to an energy storage system in a gradient manner, the waste of resources and the environmental pollution are reduced, certain economic value can be generated, and win-win effect is realized.
the power battery pack is mainly retired from the vehicle, and the three schemes of echelon utilization are mainly provided: firstly, utilize after disassembling into battery cell with the battery package, secondly utilize after disassembling into the module with the battery package, three is that whole package does not disassemble the utilization, present most patent is about disassembling into battery cell with the battery package after, test, select separately, join in marriage the group, this kind of method process is complicated, consuming time, with high costs, the automatic mainstream technique of pack changes into laser welding gradually in addition, it is worsen to disassemble the scheme feasibility, and the battery package under the retirement more or less has the problem, direct according to the circumstances of requiring the screening, the battery package of availability is not many, even there is the battery package that satisfies the requirement, because inside module has certain difference, can have the cask utility, lead to the capacity performance not come out, and the screening method of present module, test items are many, the cycle length, inefficiency, with high costs.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for rapidly screening and grading a retired battery module, and solves the problems that the screening of the retired battery module needs a plurality of tests, the period is long, and the cost is high.
In order to achieve the purpose, the invention provides the following technical scheme: a rapid screening and grading method for retired battery modules comprises the following steps:
s1, screening the battery module through appearance: observing whether the appearance is intact and whether phenomena such as breakage, liquid leakage, air leakage, obvious bulges, dents and the like exist;
s2, carrying out charge and discharge tests on the battery module, and recording the discharge capacity, the maximum static pressure difference when the charge is stopped, the maximum static pressure difference when the discharge is stopped, the highest temperature when the discharge is finished and the maximum temperature difference;
S3, classifying the qualified batteries in the step S2;
And S4, recombining the classified battery modules again for echelon utilization according to the grouping requirements.
Preferably, the step S1 is performed in a state of intact appearance, no damage, leakage, air leakage, and no obvious protrusion or dent, and the step S2 is performed in a recycling process if the above phenomenon occurs.
Preferably, the test method in step S2 is: charging to a charging termination voltage at a constant current of 0.5 ℃ at the temperature of 20 +/-5 ℃, standing for 30min, recording the maximum static pressure difference delta Vc when the charging is stopped, discharging to a discharging termination voltage at a constant current of 0.5 ℃, and recording the discharging capacity C, the maximum static pressure difference delta Vd when the discharging is stopped, the highest temperature Th when the discharging is ended and the maximum temperature difference delta T.
Preferably, the discharge capacity C of the battery module is more than or equal to 70% of nominal capacity C 0, the maximum static pressure difference delta Vc at the end of charging is less than or equal to 40mV, the maximum static pressure difference delta Vd at the end of discharging is less than or equal to 300mV, the highest temperature Th at the end of discharging is less than or equal to 40 ℃, and the maximum temperature difference delta T is less than or equal to 10 ℃, the battery module is qualified, and the unqualified battery module enters a recovery link.
Preferably, the battery module discharge capacity C of the battery modules classified in the step S3 is 85% or more of the nominal capacity C 0 and 4, the maximum deviation Δ Vc among the battery modules of 4 grades is required to be 5mV, the maximum deviation Δ Vd is 30mV, and the maximum deviation Th is 3 ℃.
Preferably, the step S3 is performed such that the discharge capacity C of the battery modules satisfies 80% × C 0 ≦ C < 85% × C 0 and is rated at 3, the maximum deviation Δ Vc between the modules is required to be 5mV, the maximum deviation Δ Vd is required to be 30mV, and the maximum deviation Th is required to be 3 ℃ when the battery modules of 3 grades are matched.
preferably, the step S3 is performed such that the discharge capacity C of the battery modules satisfies 75% × C 0 ≦ C < 80% × C 0 is rated 2, the maximum deviation Δ Vc between the modules is required to be 10mV, the maximum deviation Δ Vd is required to be 50mV, and the maximum deviation Th is required to be 5 ℃ when the battery modules of the 2-class are matched.
Preferably, the step S3 is performed such that the discharge capacity C of the battery modules satisfies 70% C 0 ≤ C < 75% C 0 is rated as 1, the maximum deviation Δ Vc between the modules is 10mV, the maximum deviation Δ Vd is 50mV, and the maximum deviation Th is 5 ℃ when the battery modules of 1 grade are matched.
Preferably, the step use in step S4 indicates that the battery modules of the same rank in step S3 are used in series.
the beneficial effects are as follows:
the invention only passes an appearance detection and capacity test project, namely the screening and grading purposes of the retired battery module are realized, the screening speed is improved, the screening cost is reduced, and the rapid screening purpose is realized.
Detailed Description
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a rapid screening and grading method for retired battery modules comprises the following steps:
S1, screening the battery module through appearance: observing whether the appearance is intact, whether phenomena such as damage, liquid leakage, air leakage, obvious bulges and dents exist, and the appearance is intact, and whether phenomena such as damage, liquid leakage, air leakage, obvious bulges and dents exist, entering the step S2, if the phenomena occur, entering a recovery processing link, discharging the battery in the recovery processing, and then carrying out mechanical crushing to classify different types of substances;
S2, carrying out charge-discharge test on the battery module, and recording the discharge capacity, the maximum static pressure difference when charge is stopped, the maximum static pressure difference when discharge is stopped, and the maximum temperature difference when discharge is finished, wherein the test method comprises the steps of charging to a charge termination voltage at a constant current of 0.5C under the condition of 20 +/-5 ℃, standing for 30min, recording the maximum static pressure difference delta Vc when charge is stopped, discharging to a discharge termination voltage at a constant current of 0.5C, recording the discharge capacity C, the maximum static pressure difference delta Vd when discharge is stopped, the maximum temperature Th when discharge is finished, the maximum temperature difference delta T, enabling the discharge capacity C of the battery module to be 70% of nominal capacity C 0, the maximum static pressure difference delta Vc when charge is stopped to be not more than 40mV, the maximum static pressure difference delta Vd when discharge is stopped to be not more than 300mV, the maximum temperature when discharge is finished to be not more than 40 ℃, enabling the maximum temperature delta T to be qualified when the maximum;
S3, classifying qualified batteries in the step S2, wherein the discharge capacity C of the battery modules is more than or equal to 85% of nominal capacity C 0 and is 4 grades, the maximum deviation of delta Vc between the modules is required to be 5mV when the 4-grade battery modules are matched, the maximum deviation of delta Vd is 30mV, the maximum deviation of Th is 3 ℃, the discharge capacity C of the battery modules is 80% of C 0 and less than 85% of C 0 and is 3 grades, the battery modules of the 3 grades are required to be matched, the maximum deviation of delta Vc between the modules is 5mV, the maximum deviation of delta Vd is 30mV, the maximum deviation of Th is 3 ℃, the discharge capacity C of the battery modules is 75% of C 0 and less than 80% of C 0 grades, the maximum deviation of delta Vc between the modules is 10mV, the maximum deviation of delta Vd is 50mV, the maximum deviation of Th is 5 ℃, the discharge capacity C of the battery modules is 70% of C 0 and less than 80% of C 0 when the 2 grades are matched, the maximum deviation of delta Vc between the modules is 10mV, the maximum deviation of delta Vc between the modules is 50mV, the discharge capacity of Th is 5 ℃ and 70% of the module when the module is matched, the maximum deviation of delta Vc between the module is;
And S4, recombining the classified battery modules according to the grouping requirements for echelon utilization, wherein the echelon utilization means that the battery modules with the same grade in the step S3 are connected in series for use, and the series use is favorable for avoiding the wooden barrel effect and better playing the capacity of the battery modules.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. a rapid screening and grading method for retired battery modules is characterized by comprising the following steps:
S1, screening the battery module through appearance: observing whether the appearance is intact and whether phenomena such as breakage, liquid leakage, air leakage, obvious bulges, dents and the like exist;
S2, carrying out charge and discharge tests on the battery module, and recording the discharge capacity, the maximum static pressure difference when the charge is stopped, the maximum static pressure difference when the discharge is stopped, the highest temperature when the discharge is finished and the maximum temperature difference;
s3, classifying the qualified batteries in the step S2;
and S4, recombining the classified battery modules again for echelon utilization according to the grouping requirements.
2. The method for rapidly screening and grading the retired battery modules according to claim 1, wherein the method comprises the following steps: in the step S1, the appearance is intact, no damage, liquid leakage, air leakage, obvious protrusion and dent are generated, and the process enters the step S2, if the phenomenon occurs, the process enters the recycling process.
3. The method for rapidly screening and grading the retired battery modules according to claim 1, wherein the method comprises the following steps: the test method in the step S2 is as follows: charging to a charging termination voltage at a constant current of 0.5 ℃ at the temperature of 20 +/-5 ℃, standing for 30min, recording the maximum static pressure difference delta Vc when the charging is stopped, discharging to a discharging termination voltage at a constant current of 0.5 ℃, and recording the discharging capacity C, the maximum static pressure difference delta Vd when the discharging is stopped, the highest temperature Th when the discharging is ended and the maximum temperature difference delta T.
4. The method for rapidly screening and grading the retired battery modules according to claim 3, wherein the discharged capacity C of the battery modules is more than or equal to 70% of nominal capacity C 0, the maximum static pressure difference DeltaVc at the end of charging is less than or equal to 40mV, the maximum static pressure difference DeltaVd at the end of discharging is less than or equal to 300mV, the highest temperature Th at the end of discharging is less than or equal to 40 ℃, the maximum temperature difference DeltaT is less than or equal to 10 ℃, the retired battery modules are qualified, and the unqualified battery modules enter a recovery link.
5. The method for rapidly screening and grading retired battery modules according to claim 1, wherein the grading in step S3 is that the discharge capacity C of the battery modules is greater than or equal to 85% of the nominal capacity C 0 and is 4 grades, the 4 grades of the battery modules require that the maximum deviation of Δ Vc among the modules is 5mV, the maximum deviation of Δ Vd is 30mV, and the maximum deviation of Th is 3 ℃ during matching.
6. The method of claim 1, wherein the step S3 is performed such that the discharge capacity C of the battery module satisfies 80% C 0 -85% C 0 to 3 levels, the maximum deviation of Δ Vc between the battery modules of 3 levels is 5mV, the maximum deviation of Δ Vd is 30mV, and the maximum deviation of Th is 3 ℃.
7. The method of claim 1, wherein the step S3 is performed such that the discharge capacity C of the battery module satisfies 75% C 0 ≤ C < 80% C 0 is 2-grade, the maximum deviation of Δ Vc between the battery modules is 10mV, the maximum deviation of Δ Vd is 50mV, and the maximum deviation of Th is 5 ℃ during the matching of the battery modules of 2-grade.
8. The method of claim 1, wherein the step S3 is performed such that the discharge capacity C of the battery module satisfies 70% C 0 -75% C 0 is 1 grade, the maximum deviation of Δ Vc between the battery modules of 1 grade is 10mV, the maximum deviation of Δ Vd is 50mV, and the maximum deviation of Th is 5 ℃ during the matching process.
9. the method for rapidly screening and grading the retired battery modules according to claim 1, wherein the method comprises the following steps: the echelon utilization in the step S4 indicates that the battery modules of the same rank in the step S3 are used in series.
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| CN201910722011.3A CN110548694A (en) | 2019-08-06 | 2019-08-06 | rapid screening and grading method for retired battery module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111381124A (en) * | 2020-03-18 | 2020-07-07 | 清华大学 | Energy storage type super capacitor screening method applied to aerospace power supply |
| CN111438077A (en) * | 2020-04-07 | 2020-07-24 | 北京工业大学 | Method for rapidly screening and detecting echelon utilization performance of retired ternary soft package battery |
| CN111495800A (en) * | 2020-04-20 | 2020-08-07 | 江苏省新能源开发股份有限公司 | Screening and grouping method for gradient reuse of power battery pack |
| CN111751753A (en) * | 2020-05-20 | 2020-10-09 | 中国电力科学研究院有限公司 | Retired power battery screening method and device based on self-heat release temperature |
| CN112474435A (en) * | 2020-11-02 | 2021-03-12 | 北京国电通网络技术有限公司 | Rapid sorting method and device for battery modules |
| CN114497775A (en) * | 2022-04-14 | 2022-05-13 | 东莞市鹏锦机械科技有限公司 | Cascade utilization method and system of retired lithium battery and readable storage medium |
| CN116754967A (en) * | 2023-04-24 | 2023-09-15 | 中广核新能源安徽有限公司固镇分公司 | Method and system for online evaluation of electrochemical cells of an energy storage power station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111381124A (en) * | 2020-03-18 | 2020-07-07 | 清华大学 | Energy storage type super capacitor screening method applied to aerospace power supply |
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| CN116754967A (en) * | 2023-04-24 | 2023-09-15 | 中广核新能源安徽有限公司固镇分公司 | Method and system for online evaluation of electrochemical cells of an energy storage power station |
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Application publication date: 20191210 |