CN113369287B - Sorting method and system for recycling retired battery modules - Google Patents
Sorting method and system for recycling retired battery modules Download PDFInfo
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- CN113369287B CN113369287B CN202110657620.2A CN202110657620A CN113369287B CN 113369287 B CN113369287 B CN 113369287B CN 202110657620 A CN202110657620 A CN 202110657620A CN 113369287 B CN113369287 B CN 113369287B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004064 recycling Methods 0.000 title claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 20
- 230000032683 aging Effects 0.000 claims description 17
- 239000000178 monomer Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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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
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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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
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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)
- Environmental & Geological Engineering (AREA)
Abstract
The invention discloses a sorting method and a sorting system for recycling a retired battery module. The method comprises the following steps: s1, pre-selecting a qualified echelon module according to a pre-selection rule; s2, measuring the initial voltage of each battery cell in the echelon module, discharging each battery cell to a set value in a constant current mode, standing for a first set time after discharging is finished, and measuring the voltage of each battery cell; s3, charging the echelon module to an upper limit total voltage; s4, waiting for a second set time after charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon modules, then transferring the echelon modules to a storage area, and measuring the open-circuit voltage OCV2 of each echelon module after waiting for a third set time; s5, calculating a k value of each echelon module; and S6, sorting the data in the step S3 and the step S5 according to a set standard, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack. The invention has simple and reliable separation process and short treatment time, and meets the requirement of mass production.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a sorting method and a sorting system for recycling a retired battery module.
Background
With the development of new energy vehicles, in the face of more and more retired batteries, the first retired battery Pack carried by a new energy vehicle to be put into use is already or is about to reach the retired condition, the step utilization in the prior art generally disassembles the retired battery Pack into modules, then carries out capacity calibration, measures the internal pressure difference and the alternating internal resistance of the full-state or empty-state battery Pack, classifies the modules according to the parameters, and finally assembles the retired battery modules in the same class into Pack to achieve the purpose of reusing the retired battery modules; the prior art only screens the retired module, does not process the retired module, and because the retired battery is mostly retired due to insufficient capacity or overlarge intra-Pack pressure difference, the screening method has extremely low yield, and the recombined Pack still has the problems of large intra-Pack pressure difference, insufficient overall capacity, short service life of the Pack caused by rapid attenuation of individual cells/modules and the like. Therefore, it is necessary to develop a sorting method and system for reusing the retired battery module.
Disclosure of Invention
The invention aims to provide a sorting method and a sorting system for recycling a retired battery module, which are used for overcoming the defects in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a sorting method for reusing retired battery modules comprises the following steps:
s1, disassembling a retired battery pack to obtain a echelon module, and preselecting a qualified echelon module according to a preselection rule;
s2, measuring the initial voltage of each cell in the echelon module, discharging each cell to a set value in a constant current manner, standing for a first set time after discharging is finished, and measuring the voltage of each cell;
s3, charging the echelon modules to an upper limit total voltage, and recording the charging capacity, the charging average voltage and the dynamic voltage of each monomer after charging of each echelon module;
s4, waiting for a second set time after charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon modules, then transferring the echelon modules to a storage area, and measuring the open-circuit voltage OCV2 of each echelon module after waiting for a third set time;
s5, calculating a k value of each echelon module according to the step S4, wherein k = (OCV 2-OCV 1)/t;
and S6, sorting the data in the step S3 and the step S5 according to a set standard, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack.
Further, still include: and S7, carrying out aging test on the finished Pack, and recording the aged discharge capacity and the highest and lowest voltage of the discharge cut-off monomer.
Further, the pre-selection rule in the step S1 is an appearance inspection, and the appearance inspection at least includes screening out liquid leakage, serious swelling, damage, and non-pole column identification modules, and encoding the pre-selected qualified echelon module.
Further, in the step S2, a current of 6A is set by using the charging and discharging device to discharge each cell to a set value of 2.1V at a constant current, and the first set time is 30min.
Further, in the step S3, the module testing equipment is used to set the 60A current to charge the entire echelon module to the upper limit total voltage of 14.2V.
Further, the second setting time in step S4 is 2h, and the third setting time is 48h.
Further, the data arrangement in the step S6 is performed according to the module number, the voltage of the module after discharging to be kept still for 30min, the total pressure of the module after discharging, the charging capacity of 60A, the dynamic voltage of the module after charging and the K value; the set standard is that the modules are classified according to the charging capacity of the modules, the total voltage or the charging constant current ratio of the modules after 6A emptying for 2h, the voltage of a charging platform or the voltage of a discharging platform and the K value.
The invention also provides a system for realizing the sorting method for reusing the retired battery module, which comprises the following steps:
the preselection module is used for disassembling the retired battery pack to obtain a echelon module, and preselecting a qualified echelon module according to a preselection rule;
the first measurement module is used for measuring the initial voltage of each battery cell in the echelon module, discharging each battery cell to a set value in a constant current mode, standing for a first set time after the discharge is finished, and measuring the voltage of each battery cell;
the recording module is used for recording the charging capacity, the charging average voltage and the dynamic voltage of each charging cut-off monomer of each echelon module after the echelon module is charged to the upper limit total voltage;
the second measurement module is used for waiting for a second set time after the charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon module, waiting for a third set time after the echelon module is transferred into the storage area, and measuring the open-circuit voltage OCV2 of each echelon module;
the calculation module is used for calculating the k value of each echelon module, wherein k = (OCV 2-OCV 1)/t;
the sorting and classifying module is used for sorting the data of the first measuring module, the second measuring module and the calculating module and then classifying the data according to a set standard, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack;
the aging test module is used for performing aging test on the finished Pack and recording the aging discharge capacity and the highest and lowest voltage of the discharge cut-off monomer;
the preselection module, the first measurement module, the recording module, the second measurement module, the calculation module, the sorting and classifying module and the aging test module are sequentially connected.
Compared with the prior art, the invention has the advantages that: the invention can efficiently utilize the retired battery module, effectively reduce the internal pressure difference of the echelon module through simple processing means, improve the overall capacity of the module, has simple and reliable whole sorting process and short processing time, and can meet the requirement of mass production; meanwhile, according to the classification standard, the echelon modules with the closest performance are classified into one type, the production and assembly links are switched to, the assembly is convenient, and the consistency and the reliability of all the recycled battery packs are guaranteed to the greatest extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flow chart of the sorting method for reusing the retired battery module according to the present invention.
Fig. 2 is a block diagram of a sorting system for the reuse of ex-service battery modules according to the present invention.
Fig. 3 is a table of all echelon cell test data in the invention.
Fig. 4 is a table for grouping the echelon cells according to the set grouping standard in the present invention.
FIG. 5 is a table of burn-in test data for the present invention.
FIG. 6 is a table of burn-in test data using a prior art method.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
The retired battery cannot be continuously used on the automobile because the actual capacity is smaller than 80% of the designed capacity or the pressure difference in the battery pack is too large, but experiments show that the retired battery has great use value in low-end application scenes such as standby power supplies, household energy storage and the like.
Referring to fig. 1, the present embodiment discloses a sorting method for recycling a retired battery module by using a retired battery pack of a passenger car factory in China as a research object, which includes the following steps:
and S1, disassembling the retired battery pack into a minimum module (6P 4S nominal: 12.8V150Ah actual capacity: 12.8V120Ah), and preselecting a qualified echelon module according to a preselection rule.
The preselection rule adopts appearance inspection, and the appearance inspection at least comprises screening out leakage, serious swelling, damage and non-polar column identification modules and encoding the preselected qualified echelon modules. For example, attach the company ladder to use the code, and then go to the next test.
S2, measuring the initial voltage of each battery cell in the echelon module, setting 6A low current by adopting charging and discharging equipment (5V 6A) to discharge each battery cell to a set value of 2.1V in a constant current mode, standing for a first set time (30 min) after discharging is finished, and measuring the voltage of each battery cell.
And S3, setting 60A large current by adopting module testing equipment (60V 120A), charging the echelon module to the upper limit total voltage of 14.2V, and recording the charging capacity, the charging average voltage and the dynamic voltage of each charging cut-off monomer.
And S4, waiting for a second set time (2 h) after the charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon modules, then transferring the echelon modules to a storage area, and measuring the open-circuit voltage OCV2 of each echelon module after waiting for a third set time (48 h) (the battery voltage reduction slope is larger when the battery is full of electricity, and the self-discharge k value of the battery module can be observed in a shorter time).
And step S5, calculating the k value of each echelon module according to the step S4, wherein k = (OCV 2-OCV 1)/t is the third set time.
And S6, sorting the data in the step S3 and the step S5 according to a set standard after the data are sorted, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack.
Wherein, the data arrangement is according to the module number, the voltage of discharging to standing for 30min, the total voltage of the module after discharging, the 60A charging capacity, the dynamic voltage of charging to stopping and the K value, as shown in figure 3; the set standards are firstly classified according to the charging capacity of the module, secondly classified according to the total voltage or the charging constant current ratio of the module after 6A emptying for 2h, thirdly classified according to the voltage of a charging platform or the voltage of a discharging platform and finally classified according to the K value, as shown in figure 4.
S7, carrying out aging test on the finished Pack, and recording the aged discharge capacity and the highest and lowest voltage of a discharge cut-off monomer, for example: after treatment and sorting, 4 12.8V modules are assembled into a 48V120Ah battery Pack according to grouping standards, aging data is shown in figure 5, and the experimental data of figure 5 shows that the Pack capacity obtained by sorting and recombining the retired battery modules by using the battery Pack aging test method is sufficient, the discharge voltage platform is stable, the intra-Pack pressure difference is small, and the battery Pack aging test method has the advantages of short test period, simple experimental equipment, suitability for batch production, high reliability in gradient utilization and the like. The aging data of Pack after screening the battery capacity, the voltage difference in the Pack in a full-charge state or an empty-charge state and the alternating-current internal resistance data into a group by using the same batch of echelon modules according to the prior art is shown in fig. 6, and the problems of insufficient Pack capacity, large battery voltage difference and the like can be seen.
Referring to fig. 2, the present invention further provides a system for implementing the sorting method for reusing the retired battery module, including: the preselection module 1 is used for disassembling the retired battery pack to obtain a echelon module, and preselecting a qualified echelon module according to a preselection rule; the first measurement module 2 is used for measuring the initial voltage of each cell in the echelon module, discharging each cell to a set value in a constant current manner, standing for a first set time after the discharge is finished, and measuring the voltage of each cell; the recording module 3 is used for recording the charging capacity, the charging average voltage and the dynamic voltage of each charging cut-off monomer of each echelon module after the echelon module is charged to the upper limit total voltage; the second measuring module 4 is used for waiting for a second set time after the charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon module, waiting for a third set time after the echelon module is transferred into the storage area, and measuring the open-circuit voltage OCV2 of each echelon module; a calculating module 5, configured to calculate a k value of each echelon module, where k = (OCV 2-OCV 1)/t; the sorting and classifying module 6 is used for sorting the data of the first measuring module, the second measuring module and the calculating module according to a set standard, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack; the aging test module 7 is used for performing aging test on the finished Pack and recording the aging discharge capacity and the highest and lowest voltage of the discharge cut-off monomer; the preselection module 1, the first measurement module 2, the recording module 3, the second measurement module 4, the calculation module 5, the sorting and classifying module 6 and the aging test module 7 are connected in sequence.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.
Claims (7)
1. The utility model provides a sorting system that retired battery module was recycled which characterized in that includes:
the preselection module is used for disassembling the retired battery pack to obtain a echelon module, and preselecting a qualified echelon module according to a preselection rule;
the first measurement module is used for measuring the initial voltage of each battery cell in the echelon module, discharging each battery cell to a set value in a constant current mode, standing for a first set time after the discharge is finished, and measuring the voltage of each battery cell;
the recording module is used for recording the charging capacity, the charging average voltage and the dynamic voltage of each charging cut-off monomer of each echelon module after the echelon module is charged to the upper limit total voltage;
the second measurement module is used for waiting for a second set time after the charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon module, waiting for a third set time after the echelon module is transferred into the storage area, and measuring the open-circuit voltage OCV2 of each echelon module;
the calculation module is used for calculating the k value of each echelon module, wherein k = (OCV 2-OCV 1)/t is third set time;
the sorting and classifying module is used for sorting the data of the first measuring module, the second measuring module and the calculating module and then classifying the data according to a set standard, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack;
the aging test module is used for performing aging test on the finished Pack and recording the aging discharge capacity and the highest and lowest voltage of the discharge cut-off monomer;
the preselection module, the first measurement module, the recording module, the second measurement module, the calculation module, the sorting and classifying module and the aging test module are sequentially connected;
the sorting method for reusing the retired battery module comprises the following steps:
s1, disassembling a retired battery pack to obtain a echelon module, and preselecting a qualified echelon module according to a preselection rule;
s2, measuring the initial voltage of each cell in the echelon module, discharging each cell to a set value in a constant current manner, standing for a first set time after discharging is finished, and measuring the voltage of each cell;
s3, charging the echelon modules to an upper limit total voltage, and recording the charging capacity, the charging average voltage and the dynamic voltage of each charging cut-off monomer of each echelon module;
s4, waiting for a second set time after charging is finished, measuring the open-circuit voltage OCV1 and the alternating-current internal resistance R of the echelon modules, then transferring the echelon modules to a storage area, and measuring the open-circuit voltage OCV2 of each echelon module after waiting for a third set time;
s5, calculating a k value of each echelon module according to the step S4, wherein k = (OCV 2-OCV 1)/t, and t is a third set time;
and S6, sorting the data in the step S3 and the step S5 according to a set standard, and then transferring the echelon module to a production assembly link according to a grading standard for echelon utilization to form a finished Pack.
2. The sorting system for recycling of ex-service battery modules as claimed in claim 1, further comprising:
and S7, carrying out aging test on the finished Pack, and recording the aged discharge capacity and the highest and lowest voltage of the discharge cut-off monomer.
3. The sorting system for recycling of ex-service battery modules as claimed in claim 1, wherein the preselected rule in step S1 is an appearance inspection, the appearance inspection at least comprises screening out leakage, serious swelling, damage, non-pole identification modules, and encoding the pre-selected qualified echelon modules.
4. The sorting system for recycling of ex-service battery modules according to claim 1, wherein in step S2, each cell is discharged to a set value of 2.1V at a constant current by setting a current of 6A with a charging and discharging device, and the first set time is 30min.
5. The sorting system for recycling of ex-service battery modules of claim 1, wherein in step S3, the module testing equipment is used to set a current of 60A to charge the entire echelon module to a total module upper limit voltage of 14.2V.
6. The sorting system for recycling of ex-service battery modules as claimed in claim 1, wherein the second setting time in step S4 is 2h, and the third setting time is 48h.
7. The sorting system for recycling of retired battery modules according to claim 1, wherein the data sorting in step S6 is performed according to module number, voltage of discharging until standing for 30min, total voltage of discharged module, 60A charging capacity, dynamic voltage of charging until K value; the set standard is that the modules are classified according to the charging capacity of the modules, the total voltage or the charging constant current ratio of the modules after 6A emptying for 2h, the voltage of a charging platform or the voltage of a discharging platform and the K value.
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| CN114130713B (en) * | 2021-10-29 | 2023-07-07 | 广东邦普循环科技有限公司 | Battery echelon utilization screening method and device |
| CN114558800A (en) * | 2022-02-24 | 2022-05-31 | 广州菲利斯太阳能科技有限公司 | Screening and recombining method and system for echelon utilization of power battery |
| CN114798502B (en) * | 2022-04-13 | 2024-02-09 | 杭州安影科技有限公司 | Classification grouping method, system and production line for gradient utilization batteries |
| CN114833097B (en) * | 2022-05-05 | 2024-01-19 | 合肥工业大学 | Sorting method and device for gradient utilization of retired power battery |
| CN117117941B (en) * | 2023-10-20 | 2024-01-30 | 珠海中力新能源科技有限公司 | Energy storage power plant |
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| JP3101117B2 (en) * | 1993-02-15 | 2000-10-23 | 松下電器産業株式会社 | Rechargeable battery charging method |
| JP5887531B2 (en) * | 2011-09-09 | 2016-03-16 | パナソニックＩｐマネジメント株式会社 | Charger |
| CN111790645B (en) * | 2020-06-18 | 2022-04-15 | 杭州意能电力技术有限公司 | Method for sorting power batteries by gradient utilization |
| CN111816938B (en) * | 2020-07-06 | 2022-01-18 | 安徽绿沃循环能源科技有限公司 | Gradient utilization method for retired battery |
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