CN110797591B - Rapid sorting method for lithium power echelon cell recombination and lithium power echelon recombination battery - Google Patents
Rapid sorting method for lithium power echelon cell recombination and lithium power echelon recombination battery Download PDFInfo
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- CN110797591B CN110797591B CN201911038002.9A CN201911038002A CN110797591B CN 110797591 B CN110797591 B CN 110797591B CN 201911038002 A CN201911038002 A CN 201911038002A CN 110797591 B CN110797591 B CN 110797591B
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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
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
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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
- 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
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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
Abstract
The invention discloses a quick sorting method for lithium power echelon cell recombination, which comprises the following steps: standing the power echelon battery cell discharged to the cut-off voltage at normal temperature for a first set time, and measuring a first voltage of the power echelon battery cell; charging the power echelon battery cell to rated capacity of a preset percentage of the rated capacity, and recording a second voltage of the power echelon battery cell; standing the power echelon battery cell charged with the rated capacity at normal temperature for a second set time, and measuring a third voltage of the power echelon battery cell; setting a first judgment condition, a second judgment condition and a third judgment condition; sorting the power echelon battery cells according to the first judgment condition, the second judgment condition and the third judgment condition; and selecting the power echelon battery cell which simultaneously meets all the judgment conditions to recombine the lithium power battery cell recombination battery. According to the method, the recombination is completed according to the key control point of the battery core analysis, and the performance and the matching degree of the recombined battery are improved.
Description
Technical Field
The invention relates to the technical field of gradient utilization of lithium power battery cells, in particular to a quick sorting method for lithium power gradient battery cell recombination and a quick sorting method for lithium power battery cell gradient battery cell recombination.
Background
China has become the largest new energy automobile market in the world, and the scrappage of the power battery for the automobile reaches 101Gwh by 2030, the scrappage of the power battery is about 116 ten thousand tons, and the retired power battery still has the residual capacity which is not higher than 80% of the rated capacity of the retired power battery, so that the power battery has recycling value. How to utilize the residual energy of the retired power battery is a research topic faced by science and technology personnel.
The definition of echelon utilization refers to a continuous use process that a certain used product reaches the original design life and then the function of the product is fully or partially recovered through other methods, and the process belongs to a basic same level or a degraded application mode. Such as energy storage systems, low speed electric vehicles, and the like. And when the performance of the lithium power battery is further reduced to be unsuitable for gradient utilization, the lithium power battery enters a stage of recycling, dismantling and reusing.
The echelon utilization of retired battery needs to pass through this key stage of electric core sorting to guarantee the performance matching degree between each electric core of group after in groups, thereby guarantee module or even battery system's stable performance output. In the current measurement of the self-discharge of the battery core, the voltage is usually tested after the battery core is fully charged and is placed for 5 days or more at normal temperature, so that voltage drop data is obtained, and the self-discharge of the battery core and the voltage of battery core matching are obtained. The acquisition of capacity data also requires the complete charging and discharging of the battery cell. The existing retired battery step sorting mode consumes long time, and a large amount of power resources are consumed at the same time.
Therefore, the existing lithium power cell gradient utilization technology still needs to be improved and developed.
Disclosure of Invention
The invention mainly aims to provide a quick sorting method for lithium power echelon cell recombination and a lithium power cell recombination battery, which have the advantages of shorter test time, higher test efficiency and capability of improving the performance and matching degree of the recombination battery.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a technical solution: the method for rapidly sorting the lithium power echelon battery cell recombination comprises the following steps:
standing the power echelon battery cell discharged to the cut-off voltage at normal temperature for a first set time, and measuring a first voltage of the power echelon battery cell;
according to a charging mode set by a power echelon battery cell original factory, charging the power echelon battery cell to rated capacity of a preset percentage of the rated capacity, and recording a second voltage of the power echelon battery cell;
standing the power echelon battery cell charged with the rated capacity at normal temperature for a second set time, and measuring a third voltage of the power echelon battery cell;
setting a first judgment condition according to the first voltage, setting a second judgment condition according to the second voltage, and setting a third judgment condition according to the third voltage;
sequentially judging the power echelon battery cell according to the first judgment condition, the second judgment condition and the third judgment condition;
the judging steps are completed for a plurality of power echelon battery cells to form a first pre-selection group, a second pre-selection group and a third pre-selection group; and
and selecting power echelon battery cells which are simultaneously divided into the first pre-selection group, the second pre-selection group and the third pre-selection group to recombine the lithium power battery cell recombination battery.
Before the step of allowing the power echelon cell to discharge to the cut-off voltage to stand at the normal temperature for a first set time, the method further includes:
and discharging the power echelon battery cell to cut-off voltage according to a discharging mode set by the original power echelon battery cell factory.
Preferably, the rated capacity is in the range of twenty to thirty-five percent of the nominal capacity.
In specific implementation, the first set time period is 2 hours, and the second set time period is 24 hours.
When the method is used for sorting the lithium-powered echelon battery cell, a first threshold value, a second threshold value and a third threshold value are set, wherein the first threshold value is a voltage difference threshold value of the first voltage, the second threshold value is a voltage difference threshold value of the second voltage, and the third threshold value is a voltage difference threshold value of the third voltage.
Wherein, should judge the step that this power echelon electricity core includes in proper order according to this first judgement condition, second judgement condition and third judgement condition:
counting the first voltage, the second voltage and the third voltage of each power echelon battery cell;
counting a first voltage difference value, a second voltage difference value and a third voltage difference value of each power echelon battery cell relative to a first power echelon battery cell;
sorting the counted power echelon battery cells according to the voltage difference threshold of the voltage to form the first pre-selected group;
sorting the counted power echelon battery cells according to the voltage difference threshold of the second voltage to form a second preselected group;
and sorting the counted power echelon battery cells according to the voltage difference threshold of the third voltage to form the third preselected group.
In a second aspect, the technical solution provided by the embodiment of the present invention is: the utility model provides a lithium power electricity core reorganization battery, includes the casing and installs a plurality of power echelon electricity cores in this casing, and this power echelon electricity core passes through the parallelly connected output electric energy of busbar, and each power echelon electricity core adopts the quick sorting method of aforementioned lithium power echelon electricity core reorganization to screen and obtains.
Further, this lithium power electricity core reorganization battery still includes two insulation boards and two fixed plates, and this insulation board sets up between the power echelon electricity core and the fixed plate at both ends, and this fixed plate is used for fixing this insulation board and a plurality of power echelon electricity core together from both sides.
The beneficial effects of the embodiment of the invention are as follows: according to the rapid sorting method for the recombination of the lithium power echelon battery cells and the lithium power battery cell recombination battery, a plurality of judgment conditions related to internal resistance, voltage, capacity and self-discharge reflecting battery cell consistency parameters are set by detecting key voltage parameters of each power echelon battery cell so as not to fully discharge the battery cells, and therefore a characteristic quantity capable of reflecting the difference between the capacity and the voltage of each battery cell is obtained, and the performance and the matching degree of the recombination battery are improved, the testing time is shortened, and the testing energy consumption is reduced. The rapid sorting method for lithium power echelon cell recombination and the lithium power cell recombination battery of the embodiment aim at retired cells of the same type and batch produced by the same manufacturer. On the premise of retired cells of the same model and batch, specific voltage conditions are associated with other performance parameters of the cells. For different types of cells, the correlation of performance parameters is different, and in addition, the shapes of the different types of cells are different, so that the retired cells of the same type and batch are not recombined.
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 structures shown in the drawings without creative efforts.
Fig. 1 is a schematic main flow diagram of a rapid sorting method for lithium-powered echelon cell recombination according to an embodiment of the present invention;
fig. 2 is a schematic overall structure diagram of a rapid sorting method for lithium-seeded power echelon cell recombination according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an example of power echelon cell sorting in the rapid sorting method for lithium power echelon cell recombination according to the embodiment of the present invention;
fig. 4 is a schematic diagram illustrating another example of power echelon cell sorting in the method for rapidly sorting cells recombined in a lithium power echelon according to the embodiment of the present invention;
fig. 5 is a structural diagram of an embodiment of a lithium power cell recombination battery according to an embodiment of the present invention;
fig. 6 is a charge-discharge curve diagram of a lithium power cell according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention discloses a quick sorting method for lithium power echelon cell recombination and a lithium power cell recombination battery.
The core of the echelon utilization of the power echelon battery cell is that a series of complex detection and analysis are required to be carried out on an original product, and the life cycle value and reusability of the original product are scientifically judged, so that the echelon grade and the application field which accord with the product are designed. The echelon utilization enables the product to be used to the maximum extent, the design cycle of the echelon utilization is prolonged, economic value is created for the society, and meanwhile, the garbage discharge is reduced for the society. Is a cyclic and low-carbon production life style which is greatly promoted by modern society.
In the recombination analysis of the lithium power echelon battery cell, four parameters reflecting the consistency of the battery cell, such as internal resistance, voltage, capacity and self-discharge rate, are key control points for sorting and recombining the battery cell. According to the invention, the characteristic quantity capable of reflecting the capacity and voltage difference of each battery cell is obtained without fully discharging the battery cell, the test time is shortened, the test energy consumption is reduced, and the rapid sorting method of the embodiment can measure the self-discharge rate of the battery cell in a shorter time and also shorten the test time aiming at the condition that the capacity of the battery cell of the retired battery is lower.
In this embodiment, three voltage values are measured at the discharging and charging stage of the power echelon battery cell, and the three voltage values are related to the internal resistance, the voltage, the capacity, and the self-discharging rate. Fig. 6 is a graph showing a charge-discharge curve of a lithium power echelon battery cell, and fig. 6 is a graph showing a relationship between voltage and capacity when a lithium ion battery cell is normally charged and discharged. The ordinate represents voltage, and the abscissa represents charge/discharge cumulative capacity. That is, the accumulated value of the charge or discharge capacity with time at the time of charge or discharge, and if the abscissa is converted to time, it can be understood as the change of the cell voltage with time at the time of charge or discharge. It can be seen that, in a single charging process or discharging process, the voltage and the capacity value are in one-to-one correspondence, which is the fundamental basis for the patent to use the voltage to represent the capacity.
In the embodiment, by detecting the key voltage parameter of each power echelon battery cell and setting a plurality of judgment conditions related to internal resistance, voltage, capacity and self-discharge reflecting battery cell consistency parameters, the battery cell is not fully discharged, a characteristic quantity capable of reflecting the capacity and voltage difference of each battery cell is obtained, and the test time is shortened and the test energy consumption is reduced while the performance and the matching degree of the recombined battery are improved.
The rapid sorting method for lithium power echelon cell recombination and the lithium power cell recombination battery of the embodiment aim at retired cells of the same type and batch produced by the same manufacturer. On the premise of retired cells of the same model and batch, specific voltage conditions are associated with other performance parameters of the cells. For different types of cells, the correlation of performance parameters is different, and in addition, the shapes of the different types of cells are different, so that the retired cells of the same type and batch are not recombined.
Example 1
Referring to fig. 1 and fig. 2, the present embodiment relates to a method for rapidly sorting cells by lithium power gradient cell recombination.
The quick sorting method for lithium power echelon battery cell recombination comprises the following steps:
step 100: and discharging the power echelon battery cell to cut-off voltage according to a discharging mode set by the original power echelon battery cell factory.
Step 101: standing the power echelon battery cell discharged to the cut-off voltage at normal temperature for a first set time, and measuring a first voltage U1 of the power echelon battery cell;
step 102: according to a charging mode set by a power echelon battery cell original factory, charging the power echelon battery cell to rated capacity of a preset percentage of the rated capacity, and recording a second voltage U2 of the power echelon battery cell;
step 103: standing the power echelon battery cell charged with the rated capacity at the normal temperature for a second set time, and measuring a third voltage U3 of the power echelon battery cell;
step 104: setting a first judgment condition according to the first voltage U1, setting a second judgment condition according to the second voltage U2, setting a third judgment condition according to the third voltage U3, and sequentially judging the power echelon battery cell according to the first judgment condition, the second judgment condition and the third judgment condition;
step 105: the judging steps are completed for a plurality of power echelon battery cells to form a first pre-selection group, a second pre-selection group and a third pre-selection group; and
step 106: and selecting power echelon battery cells which are simultaneously divided into the first pre-selection group, the second pre-selection group and the third pre-selection group to recombine the lithium power battery cell recombination battery.
In this embodiment, the rated capacity is in the range of twenty to thirty-five percent of the nominal capacity. The first set period of time is 2 hours and the second set period of time is 24 hours.
Referring to fig. 3 and fig. 4, in the fast sorting method for lithium-powered gradient cell regrouping, a first threshold Δ U1, a second threshold Δ U2, and a third threshold Δ U3 are set during sorting. The first threshold Δ U1 is a voltage difference threshold of the first voltage, the second threshold Δ U2 is a voltage difference threshold of the second voltage, and the third threshold Δ U3 is a voltage difference threshold of the third voltage.
Wherein, should judge the step that this power echelon electricity core includes in proper order according to this first judgement condition, second judgement condition and third judgement condition:
counting the first voltage, the second voltage and the third voltage of each power echelon battery cell;
counting a first voltage difference value, a second voltage difference value and a third voltage difference value of each power echelon battery cell relative to a first power echelon battery cell;
sorting the counted power echelon battery cells according to the voltage difference threshold of the voltage to form the first pre-selected group;
sorting the counted power echelon battery cells according to the voltage difference threshold of the second voltage to form a second preselected group;
and sorting the counted power echelon battery cells according to the voltage difference threshold of the third voltage to form the third preselected group.
In specific implementation, for the power echelon battery cell which is tested, the power echelon battery cell is screened according to three voltage difference judgment conditions of a first threshold | Δ U1| ≦ 50 mv, a second threshold | Δ U2| ≦ 50 mv, and a third threshold | Δ U3| ≦ 30 mv. The first voltage U1 reflects polarization internal resistance of the battery cell, the second voltage U2 reflects voltage and capacity of the battery cell, and the third voltage U3 reflects self-discharge and alternating current internal resistance of the battery cell.
The power echelon battery cell is sorted according to the first threshold | delta U1|, the second threshold | delta U2|, and the third threshold | delta U3|, so that the purpose of screening and recombining the power echelon battery cell according to four key control points of internal resistance, voltage, capacity, and self-discharge is achieved.
As shown in fig. 3 and 4, it is assumed that the first threshold | Δ U1|, the second threshold | Δ U2|, and the third threshold | Δ U3| are all 50 mv, and only the # 3-17 power step cell satisfies the three threshold conditions. In fig. 4, the first threshold value Δ U1 is set to 50 mv, which can be grouped with the power step cell No. 1, and only the power step cell No. 2-8 can be selected.
Example 2
Referring to fig. 5, the lithium power cell restructuring battery of the embodiment includes a casing and a plurality of power step cells installed in the casing, for example, the power step cell 21 and the power step cell 22. The power echelon battery cells are connected in parallel through the busbar 30 to output electric energy. Each power echelon battery cell in the embodiment is obtained by screening by adopting the rapid sorting method for lithium power echelon battery cell recombination.
The lithium power battery cell recombination battery also comprises two insulation plates 11 and two fixing plates 14 which are arranged at two ends of the parallel multi-trunk power echelon battery cell. The insulating plate 11 is disposed between the power step cells at the two ends and the fixing plate 14, and the fixing plate 14 is used to fix the insulating plate 11 and the plurality of power step cells together from two sides.
According to the rapid sorting method for the recombination of the lithium power echelon battery cells and the lithium power battery cell recombination battery, a plurality of judgment conditions related to internal resistance, voltage, capacity and self-discharge reflecting battery cell consistency parameters are set by detecting key voltage parameters of each power echelon battery cell so as not to fully discharge the battery cells, and therefore a characteristic quantity capable of reflecting the difference between the capacity and the voltage of each battery cell is obtained, and the performance and the matching degree of the recombination battery are improved, the testing time is shortened, and the testing energy consumption is reduced.
Further, the rapid sorting method for lithium power echelon cell recombination and the lithium power cell recombination battery of the embodiment can realize that the self-discharge rate of the cell is measured in a shorter time under the condition of lower cell capacity, and the test time is also shortened.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings, or any other related technical fields, within the spirit of the present invention, are included in the scope of the present invention.
Claims (6)
1. A quick sorting method for lithium power echelon cell recombination is characterized by comprising the following steps:
standing the power echelon battery cell discharged to the cut-off voltage at normal temperature for a first set time, and measuring a first voltage of the power echelon battery cell;
according to a charging mode set by a power echelon battery cell original factory, charging the power echelon battery cell to rated capacity of a preset percentage of the rated capacity, and recording a second voltage of the power echelon battery cell;
standing the power echelon battery cell charged with the rated capacity at normal temperature for a second set time, and measuring a third voltage of the power echelon battery cell;
setting a first judgment condition according to the first voltage, setting a second judgment condition according to the second voltage, and setting a third judgment condition according to the third voltage;
sequentially judging the power echelon battery cell according to the first judgment condition, the second judgment condition and the third judgment condition;
the judging steps are completed for a plurality of power echelon battery cells to form a first pre-selection group, a second pre-selection group and a third pre-selection group; and
selecting power echelon battery cells simultaneously selected into the first pre-selection group, the second pre-selection group and the third pre-selection group to recombine the lithium power battery cell recombination battery;
setting a first threshold value, a second threshold value and a third threshold value, wherein the first threshold value is a voltage difference threshold value of the first voltage, the second threshold value is a voltage difference threshold value of the second voltage, and the third threshold value is a voltage difference threshold value of the third voltage;
the step of sequentially judging the power echelon battery cell according to the first judgment condition, the second judgment condition and the third judgment condition comprises the following steps:
counting the first voltage, the second voltage and the third voltage of each power echelon battery cell;
counting a first voltage difference value, a second voltage difference value and a third voltage difference value of each power echelon battery cell relative to a first power echelon battery cell;
sorting the counted power echelon battery cells according to the voltage difference threshold of the first voltage to form the first pre-selected group;
sorting the counted power echelon battery cells according to the voltage difference threshold of the second voltage to form a second preselected group;
sorting the counted power echelon battery cells according to the voltage difference threshold of the third voltage to form a third preselected group;
the first threshold is less than or equal to 50 millivolts, the second threshold is less than or equal to 50 millivolts, and the third threshold is less than or equal to 30 millivolts.
2. The method for rapidly sorting the recombined lithium power gradient cells according to claim 1, further comprising, before the step of allowing the power gradient cells discharged to the cut-off voltage to stand at the normal temperature for a first set time period:
and discharging the power echelon battery cell to cut-off voltage according to a discharging mode set by a power echelon battery cell original factory.
3. The method of claim 1, wherein the rated capacity is in a range of twenty to thirty-five percent of a nominal capacity.
4. The rapid sorting method for lithium-powered echelon cell recombination according to claim 1, characterized in that,
the first set time period is 2 hours, and the second set time period is 24 hours.
5. A lithium power battery cell recombination battery comprises a shell and a plurality of power echelon battery cells installed in the shell, wherein the power echelon battery cells output electric energy in parallel through a busbar, and the lithium power battery cell recombination battery is characterized in that each power echelon battery cell is obtained by screening according to the quick sorting method for lithium power echelon battery cell recombination of any one of claims 1 to 4.
6. The lithium power battery cell recombination battery of claim 5, further comprising two insulation plates and two fixing plates, wherein the insulation plates are disposed between the power step battery cells at the two end portions and the fixing plates, and the fixing plates are used for fixing the insulation plates and the plurality of power step battery cells together from two sides.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911038002.9A CN110797591B (en) | 2019-10-29 | 2019-10-29 | Rapid sorting method for lithium power echelon cell recombination and lithium power echelon recombination battery |
| AU2020203011A AU2020203011B2 (en) | 2019-10-29 | 2020-03-19 | Method for quickly grouping and repairing decommissioned batteries |
| DE112020005205.2T DE112020005205T5 (en) | 2019-10-29 | 2020-03-19 | Procedure for quick grouping and repair of dead batteries |
| GB2019104.5A GB2599453A (en) | 2019-10-29 | 2020-03-19 | Rapid grouping and repairing method for recycled batteries |
| SG11202003909PA SG11202003909PA (en) | 2019-10-29 | 2020-03-19 | Method for Quickly Grouping and Repairing Decommissioned Batteries |
| PCT/CN2020/080177 WO2021082341A1 (en) | 2019-10-29 | 2020-03-19 | Rapid grouping and repairing method for recycled batteries |
| JP2020083597A JP7076495B2 (en) | 2019-10-29 | 2020-05-12 | How to quickly group and repair used batteries |
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| CN201911038002.9A CN110797591B (en) | 2019-10-29 | 2019-10-29 | Rapid sorting method for lithium power echelon cell recombination and lithium power echelon recombination battery |
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| CN110797591A CN110797591A (en) | 2020-02-14 |
| CN110797591B true CN110797591B (en) | 2021-07-16 |
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| CN110797591B (en) * | 2019-10-29 | 2021-07-16 | 深圳市普兰德储能技术有限公司 | Rapid sorting method for lithium power echelon cell recombination and lithium power echelon recombination battery |
| CN113086961B (en) * | 2021-03-29 | 2023-04-28 | 南京工业大学 | Electrochemical-based waste lithium iron phosphate repairing and recycling method |
| CN113210299B (en) * | 2021-03-31 | 2023-01-24 | 深圳供电局有限公司 | Battery pack sorting method, apparatus, computer device and storage medium |
| CN113281660A (en) * | 2021-05-21 | 2021-08-20 | 张家港清研检测技术有限公司 | Method for detecting unqualified battery cell in retired power battery pack |
| CN113488708B (en) * | 2021-05-31 | 2023-05-02 | 国网山东省电力公司滨州供电公司 | Method for recycling unqualified storage battery pack |
| CN113793992A (en) * | 2021-08-06 | 2021-12-14 | 哈尔滨德特科技有限公司 | Gradient utilization method of vehicle retired power battery in agricultural greenhouse |
| CN113759254B (en) * | 2021-09-27 | 2023-12-26 | 中国联合网络通信集团有限公司 | Battery reorganization method, device, equipment and storage medium |
| CN113884894B (en) * | 2021-11-15 | 2023-07-21 | 长沙理工大学 | Battery cluster inconsistency on-line monitoring method based on external characteristics |
| CN114082680B (en) * | 2021-11-22 | 2023-06-02 | 芜湖天弋能源科技有限公司 | Method for optimizing cycle performance of lithium battery module |
| 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 |
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| AU2020203011A1 (en) | 2021-05-13 |
| SG11202003909PA (en) | 2021-06-29 |
| GB2599453A (en) | 2022-04-06 |
| JP2021072275A (en) | 2021-05-06 |
| JP7076495B2 (en) | 2022-05-27 |
| DE112020005205T5 (en) | 2022-07-28 |
| AU2020203011B2 (en) | 2022-02-17 |
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| CN110797591A (en) | 2020-02-14 |
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