CN113210299B - Battery pack sorting method, apparatus, computer device and storage medium - Google Patents
Battery pack sorting method, apparatus, computer device and storage medium Download PDFInfo
- Publication number
- CN113210299B CN113210299B CN202110352433.3A CN202110352433A CN113210299B CN 113210299 B CN113210299 B CN 113210299B CN 202110352433 A CN202110352433 A CN 202110352433A CN 113210299 B CN113210299 B CN 113210299B
- Authority
- CN
- China
- Prior art keywords
- battery pack
- voltage
- value
- voltage difference
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 64
- 208000028659 discharge Diseases 0.000 claims description 107
- 238000004590 computer program Methods 0.000 claims description 10
- 238000012797 qualification Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
-
- 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
-
- 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
Landscapes
- 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 application relates to a battery pack sorting method, a battery pack sorting device, a computer device and a storage medium. The method comprises the following steps: respectively acquiring a first voltage value of each single battery; obtaining a plurality of first voltage difference values according to the plurality of first voltage values, wherein each first voltage difference value is a difference value between any two first voltage values; and outputting the information that the battery pack is to be disassembled when the first voltage difference is greater than or equal to the first difference threshold. By adopting the method, the retired battery pack can be sorted quickly and accurately.
Description
Technical Field
The present application relates to the field of battery recycling, and in particular, to a battery pack sorting method and apparatus, a computer device, and a storage medium.
Background
The power battery is a power supply for providing power source for tools, and has the characteristics of high energy, high power, high-rate discharge, wide working temperature range and long service life. The electric automobile uses a power battery pack consisting of a plurality of single batteries, and the power battery pack consists of hundreds of power batteries with better electrical property consistency. The power battery determines the performance of the electric automobile, and when the performance of the power battery pack is reduced to a certain degree, the power battery is replaced in time in order to guarantee the driving requirement and the safety requirement of the electric automobile.
However, with the rapid development of new energy automobile industry, the replacement and decommissioning of power batteries lead to the idling of a large number of decommissioned power batteries, which causes the problem of energy waste, and the echelon utilization of power batteries becomes an effective solution to the problem. Due to the wide application scene of the power battery, the performance of the retired battery has great inconsistency, and the direct use of the power battery causes the problems of low safety and low efficiency. Therefore, the sorting method with high research speed and high consistency has great significance for the utilization of the retired batteries.
Disclosure of Invention
In view of the above, it is necessary to provide a battery pack sorting method, apparatus, computer device and storage medium capable of quickly and accurately sorting retired batteries.
A battery pack sorting method, the battery pack including a plurality of cells, the method comprising:
respectively acquiring a first voltage value of each single battery;
obtaining a plurality of first voltage difference values according to the plurality of first voltage values, wherein each first voltage difference value is a difference value between any two first voltage values;
and outputting the information that the battery pack is to be disassembled when the first voltage difference is greater than or equal to the first difference threshold.
In one embodiment, the method further comprises the following steps:
when the first voltage difference value is smaller than a first difference threshold value, performing first charge-discharge circulation on the battery pack;
re-acquiring a second voltage value of each single battery at the final discharge stage in the first charge-discharge cycle process;
obtaining a plurality of second voltage difference values according to the plurality of second voltage values, wherein each second voltage difference value is a difference value between any two second voltage values;
and outputting qualified information of the battery pack when the second voltage difference value meets a first preset condition.
In one embodiment, the method further comprises the following steps:
after the first charge-discharge cycle is executed, acquiring a first discharge capacity in the battery pack;
wherein, when the second voltage difference satisfies the first predetermined condition, including:
and outputting the qualified information of the battery pack when the first discharge capacity is larger than the capacity threshold and the second voltage difference value is smaller than the second difference threshold.
In one embodiment, the method further comprises the following steps:
when the first discharge capacity is smaller than or equal to the capacity threshold value or the second voltage difference value is larger than or equal to the second difference value threshold value, performing second charge-discharge circulation on the battery pack;
re-acquiring a third voltage value of each single battery at the final discharge stage in the second charge-discharge cycle process;
obtaining a plurality of third voltage difference values according to the plurality of third voltage values, wherein each third voltage difference value is a difference value between any two third voltage values;
and outputting the information that the battery pack is to be disassembled when the third voltage difference value meets a second preset condition.
In one embodiment, the method further comprises the following steps:
obtaining a second discharge capacity in the battery pack after performing the second charge-discharge cycle;
when the third voltage difference satisfies a second preset condition, the method includes:
and outputting the information to be disassembled of the battery pack when the second discharge capacity is larger than the capacity threshold and the third voltage difference value is smaller than the second difference threshold.
In one embodiment, the method further comprises the following steps:
and outputting the qualified information of the battery pack when the second discharge capacity is less than or equal to the capacity threshold value or the third voltage difference value is greater than or equal to the second difference threshold value.
In one embodiment, before performing the second charge/discharge cycle on the battery pack, the method includes:
configuring an equilibrium voltage value for a single battery of a battery pack;
performing a second charge-discharge cycle on the battery pack, comprising:
and respectively carrying out equalizing charge on each single battery according to the equalizing voltage value so as to execute a second charge-discharge cycle.
A battery pack sorting apparatus comprising:
the acquisition module is used for respectively acquiring a first voltage value of each single battery;
the calculation module is used for acquiring a plurality of first voltage difference values according to the plurality of first voltage values, wherein each first voltage difference value is a difference value between any two first voltage values;
and the output module is used for outputting the information to be disassembled of the battery pack when the first voltage difference value is greater than or equal to the first difference threshold value.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps of the method when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.
The battery pack sorting method, the battery pack sorting device, the computer equipment and the storage medium are used for respectively obtaining a first voltage value of each single battery; obtaining a plurality of first voltage difference values according to the plurality of first voltage values, wherein each first voltage difference value is a difference value between any two first voltage values; and when the first voltage difference value is greater than or equal to a first difference threshold value, outputting the information to be disassembled of the battery pack. The group battery has gone through once and has used, battery cell in it is at the charge-discharge process that experiences different, work under different ambient temperature, its performance also can produce different changes, the monomer uniformity difference of group battery is big, inside complexity is also high, the inside inconsistency of group battery will directly influence the capacity performance of battery secondary use, the residual life of power performance and group battery, retired battery more has the possibility of producing the trouble simultaneously, in order to ensure the security and the economic nature that battery echelon was used, must at first sort the group battery again into groups, it is sorting of continuing to accomplish battery cell again to disassemble according to the sorting result of group battery again. This application adopts and compares whether the voltage difference between arbitrary two battery cells in the group battery satisfies the condition, and whether the information can be sorted to the retired group battery that needs to be disassembled fast accurately and economically to the output group battery, avoids the problem of the increase of cost that brings that once only disassembles the group battery of all retired.
Drawings
FIG. 1 is one of the flow diagrams of a battery pack sorting method according to one embodiment;
FIG. 2 is a second schematic flow chart of a battery pack sorting method according to an embodiment;
FIG. 3 is a third schematic flow chart diagram illustrating a battery pack sorting method according to an embodiment;
FIG. 4 is a fourth schematic flow chart illustrating a battery sorting method according to one embodiment;
FIG. 5 is a fifth flowchart illustrating a battery pack sorting method according to one embodiment;
FIG. 6 is a block diagram of the battery pack sorting apparatus according to one embodiment;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
In one embodiment, as shown in fig. 1, there is provided a battery pack sorting method comprising the steps of:
step S100, respectively obtaining a first voltage value of each single battery.
Specifically, the battery pack comprises a plurality of single batteries, and the voltage of each single battery in the standing process of the battery pack is collected. Taking a retired lithium battery pack as an example, the retired lithium battery pack includes 3 single batteries. And collecting the voltages of the 3 single batteries as a first voltage value.
Step S200, obtaining a plurality of first voltage difference values according to the plurality of first voltage values, where each first voltage difference value is a difference value between any two first voltage values.
Specifically, a voltage difference between any two unit cells in the battery pack is calculated. Taking the retired lithium battery pack as an example, calculating a voltage difference between any two single batteries of the 3 single batteries, and obtaining 3 first voltage differences.
Step S300, when the first voltage difference value is larger than or equal to the first difference threshold value, outputting information to be disassembled of the battery pack.
Specifically, it is determined whether the battery pack needs to be disassembled, and it is determined that the battery pack should be classified as the battery pack to be disassembled if the plurality of first voltage differences are all greater than or equal to the first preset voltage value.
In the present embodiment, the voltage difference between the unit cells affects the performance of the entire battery pack. For example, a phenomenon in which the battery pack is insufficiently charged occurs. Thus, by comparing the first voltage difference value with a first difference threshold value, it can be determined whether the battery pack can be recycled. And if the standing pressure difference between the single batteries in the battery pack does not meet the standard, determining that the battery pack can not be used any more and is used after being disassembled.
In one embodiment, the first preset voltage value may be 100mV. It is understood that the first difference threshold value is only required to satisfy a standard pressure difference equal to the maximum standard pressure difference that any two single batteries in the battery pack can bear.
In the battery pack sorting method, the standing pressure difference between the single batteries of the battery pack is preferentially tested, and whether the battery pack can be recycled is determined according to the standing pressure difference, so that the battery pack is firstly subjected to one-round screening. Therefore, the information whether the battery pack is to be disassembled can be quickly and accurately obtained, and the problems of large task amount and high cost in the retired battery screening process are solved. The effect of sorting the retired batteries quickly, accurately, economically and effectively is achieved.
In one embodiment, as shown in fig. 2, the battery pack sorting method further includes steps S400 to S430.
In step S400, when the first voltage difference is smaller than the difference threshold, a first charge and discharge cycle is performed on the battery pack.
And step S410, re-acquiring a second voltage value of each single battery at the final discharge stage in the first charge-discharge cycle process.
Wherein, the last stage of the discharge describes that the SOC (State of charge) State of charge of the single battery reaches a preset value during the discharge process of the battery pack, wherein the SOC (State of charge) State of charge is used for reflecting the residual capacity of the battery, and is numerically defined as the ratio of the residual capacity to the battery capacity, and is expressed by percentage. The value range is 0-1, when SOC (State of charge) is equal to 0, the battery is completely discharged, and when SOC (State of charge) is equal to 1, the battery is completely charged.
Specifically, a second voltage value at which the SOC (State of charge) of each unit battery in the battery pack is 20% may be collected. It is understood that the SOC (State of charge) of the unit battery may be set appropriately according to the need of sorting the batteries.
In step S420, a plurality of second voltage difference values are obtained according to the plurality of second voltage values, where each second voltage difference value is a difference value between any two second voltage values.
In step S430, when the second voltage difference satisfies the first preset condition, the battery pack qualification information is output.
In this embodiment, through carrying out the charge-discharge cycle to the group battery, gather the battery second voltage difference at last stage of discharging, confirm according to the second voltage difference whether the group battery can recycle, utilize simple operation to select separately the battery again, can reduce the problem that the battery selects separately a large quantity, reach quick effectual battery and select separately work.
In one embodiment, as shown in fig. 3, after obtaining a plurality of second voltage difference values according to a plurality of second voltage values in step S420, each of the second voltage difference values is a difference value between any two second voltage values, step S421 and step S431 are further included.
In step S421, a first discharge capacity in the battery pack is obtained.
In step S430, when the second voltage difference satisfies the first preset condition, outputting battery pack qualification information, including:
step S431, when the first discharge capacity is greater than the capacity threshold and the second voltage difference is smaller than the second difference threshold, outputting the battery pack qualification information.
In this embodiment, the battery pack is analyzed by calculating a first discharge capacity of the battery pack during the first charge/discharge cycle and a second differential pressure at the final discharge stage of any two single batteries in the battery pack during the first charge/discharge cycle. The important reference condition for battery sorting can be increased, and the method is favorable for accurately sorting the retired batteries.
In one embodiment, the capacity threshold is 80% of the nominal capacity of the battery pack. The second difference threshold is 650mV. It is understood that the second difference threshold and the capacity threshold may be set appropriately according to different retired batteries. For example, the unit cells in the battery pack are exemplified by lithium iron phosphate electric bus unit cells, and the nominal capacity of the battery pack is 100Ah, and if the battery pack includes 3 unit cells, the nominal capacity of the battery pack is 300Ah. The calculation method of the capacity threshold comprises the following steps: and (3) performing charge-discharge circulation on the battery pack for 1 time according to 0.2C of the nominal capacity, and recording the discharge capacity of the battery pack, namely the capacity threshold.
In one embodiment, in step S450, when the first discharge capacity is greater than the capacity threshold and the second voltage difference is less than the second difference threshold, after the battery pack qualification information is output, the battery packs may be classified according to the first discharge capacity.
In one embodiment, grading the battery pack comprises: and grading the battery pack according to the first discharge capacity according to a nominal capacity with a capacity difference standard of 10%, namely according to a capacity difference standard of 10 Ah. For example, a battery pack having a capacity of 60Ah to 70Ah is divided into one stage; the battery pack with the capacity of 70-80 Ah is divided into another stage.
In one embodiment, grading the battery pack further comprises: and calculating a capacity retention rate according to the calculated first discharge capacity, and grading the battery pack according to the capacity retention rate. For example, the battery pack is classified with the calculated capacity retention rate of 2% as a sort grade. The method for calculating the capacity retention rate is as follows: and dividing the first discharge capacity by the first discharge capacity of the battery pack to obtain the capacity retention rate of the battery pack after one-time cyclic charge and discharge.
In one embodiment, the single batteries with lower capacity coefficients in the battery pack can be removed.
In one embodiment, the battery pack may be further classified according to the internal resistance. Specifically, the internal resistance of the single battery in the battery pack is acquired. And grading the battery pack according to the internal resistance. Colleagues may also classify the battery together according to the capacity retention rate and the battery internal resistance.
In one embodiment, as shown in fig. 4, after the first discharge capacity in the battery pack is obtained in step S421, steps S460 to S490 are further included.
In step S460, when the first discharge capacity is less than or equal to the capacity threshold, or the second voltage difference is greater than or equal to the second difference threshold, a second charge-discharge cycle is performed on the battery pack.
In step S470, the third voltage value of each unit cell at the last stage of discharge in the second charge/discharge cycle process is obtained again.
Step S480, a plurality of third voltage difference values are obtained according to the plurality of third voltage values, and each third voltage difference value is a difference value between any two third voltage values.
Step S490, when the third voltage difference satisfies a second preset condition, outputting information of the battery pack to be disassembled.
In the embodiment, the battery pack is subjected to charge and discharge circulation again to judge whether the secondary sorting of the battery which does not meet the requirement of outputting qualified information is performed after the first charge and discharge circulation, so that the problem of low accuracy caused by a simple sorting method is solved, and the sorting accuracy of the battery pack is ensured.
In one embodiment, as shown in fig. 5, after step S480, obtaining a plurality of third voltage difference values according to the plurality of third voltage values, and obtaining a difference value between any two third voltage values of each third voltage difference value, step S481 and step S491 are further included.
In step S481, a second discharge capacity in the battery pack is acquired.
In step S490, when the third voltage difference satisfies the second preset condition, the information that the battery pack is to be disassembled is output. The method comprises the following steps:
in step S491, when the second discharge capacity is greater than the capacity threshold and the third voltage difference is smaller than the second difference threshold, the information that the battery pack is to be disassembled is output.
In this embodiment, when the battery pack discharges, the single battery with low capacity will reach the lower limit protection voltage value first, and even if other single batteries still have capacity that is not discharged, the protection board of the battery pack also turns off the discharge function. This may cause some single batteries to be not fully charged, and the electric quantity of some single batteries is not used up, resulting in the performance of the whole battery pack being reduced. Therefore, in the present application, it is necessary to calculate the second discharge capacity of the battery pack during the second charge and discharge cycle again, and determine whether the battery pack can be recycled according to the second discharge capacity.
In one embodiment, after the step S461, the method further includes, after acquiring the second discharge capacity in the battery pack:
and outputting the qualified information of the battery pack when the second discharge capacity is less than or equal to the capacity threshold value or the third voltage difference value is greater than or equal to the second difference threshold value.
In the embodiment, the battery pack is sorted by judging the static pressure difference of the battery pack, the discharge capacity after two charge and discharge cycles and the pressure difference at the final discharge stage, so that the accuracy of sorting the battery pack can be ensured.
In one embodiment, step S460, before performing the second charge and discharge cycle on the battery pack, when the first discharge capacity is less than or equal to the capacity threshold or the second voltage difference is greater than or equal to the second difference threshold, includes:
and step S462, configuring an equalizing voltage value for the single battery of the battery pack.
Performing a second charge-discharge cycle on the battery pack, comprising:
and respectively carrying out equalizing charge on each single battery according to the equalizing voltage value so as to execute a second charge-discharge cycle.
In the present embodiment, in order to solve the self-discharge problem caused by the rest of the battery pack, it is necessary to set the voltage of the battery pack to a certain value, for example, 3.5V, by all the batteries. The voltage is uniformly set to a certain value, and an equalization tester can be adopted, or other setting instruments can be adopted, so long as the voltage of the single batteries in the battery pack can be uniformly adjusted. The secondary charging is uniformly carried out on the battery pack. In the present embodiment, the uniformity of the entire battery pack can be improved by the single-string balancing method using the balancing apparatus.
In one embodiment, the battery pack sorting method may be implemented as follows:
(1) The method comprises the steps of collecting a first voltage value of each single battery in the standing process of the battery pack, and calculating according to the first voltage value to obtain a first voltage difference value between any two single batteries in the plurality of battery packs.
(2) And comparing a plurality of first voltage difference values in the battery pack with a preset first difference threshold value of 100mV, and executing the next step according to the comparison result. When the first voltage difference value is greater than or equal to the first difference threshold value of 100mV, outputting the information of the battery pack to be disassembled; when the first voltage difference is less than the first difference threshold value of 100mV, a first charge-discharge cycle is performed on the battery pack.
(3) After the battery pack performs the first middle discharge cycle, calculating a first discharge capacity of the battery pack in the first middle discharge cycle and a second voltage difference value of any two single batteries in the battery pack at the last discharge stage in the first middle discharge cycle.
(4) When the first discharge capacity is greater than the preset capacity threshold and the second voltage difference is less than the preset second difference threshold, 650mV is used to output a prompt message that the battery pack is qualified, and classification is performed according to the first discharge capacity and a preset classification rule, and for specific limitation of the classification rule, reference may be made to other specific embodiments above, which is not described herein again. When the second voltage difference value is larger than or equal to a second difference threshold value 650mV, or the first discharge capacity is smaller than or equal to the capacity threshold value, the voltage of the battery pack is set to 3.5V through the balance tester, and then the battery pack is subjected to a second charge-discharge cycle.
(5) And (4) repeating the step (3) to obtain a second discharge capacity and a third voltage difference value.
(6) When the second discharge capacity is smaller than or equal to the capacity threshold value or the third voltage difference value is larger than or equal to the second difference value threshold value, outputting battery pack qualification information; and repeating the above-mentioned step (4) of performing a classification operation on the battery pack. And when the second discharge capacity is larger than the capacity threshold and the third voltage difference value is smaller than the second difference threshold, outputting information to be disassembled of the battery pack.
It should be understood that although the various steps in the flow charts of fig. 1-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-5 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed sequentially, but may be performed alternately or in alternation with other steps or at least some of the other steps or stages.
In one embodiment, as shown in fig. 6, there is provided a battery pack sorting apparatus 100 comprising: an acquisition module 110, a calculation module 120, and an output module 130. Wherein: the collecting module 110 is configured to obtain first voltage values of the individual batteries respectively. The calculating module 120 is configured to obtain a plurality of first voltage difference values according to the plurality of first voltage values, where each of the first voltage difference values is a difference between any two first voltage values. The output module 130 is configured to output information to be disassembled of the battery pack when the first voltage difference is greater than or equal to the difference threshold.
For specific limitations of the battery pack sorting apparatus, reference may be made to the above limitations of the battery pack sorting method, which are not described in detail herein. The various modules in the battery pack sorting apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 7. The computer device comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a battery pack sorting method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
The external battery pack of the computer equipment in the embodiment of the application is used for storing electric quantity, and the anode and the cathode of the battery pack can be separated and can receive energy-carrying particles. According to the application scenario of the battery pack, the battery pack in the embodiment of the present application may include a power battery pack and an energy storage battery pack, where the power battery pack may be applied to the fields of electric vehicles, electric bicycles, and other electric tools, and the energy storage battery pack may be applied to the fields of energy storage power stations, renewable energy grid connection, micro-grids, and the like. Taking the power battery pack as an example, the battery pack may be, but is not limited to, a lithium iron phosphate system battery pack or a silicon-added system battery pack, where the lithium iron phosphate system battery pack is a lithium ion battery pack with a positive electrode active material containing lithium iron phosphate, and the silicon-added system battery pack is a lithium ion battery pack with a negative electrode active material containing silicon. In terms of the size of the battery pack, the battery pack may be a single battery cell, or may be a battery pack module or a battery pack, and is not particularly limited in the embodiment of the present application. The battery pack is logically connected with the processor through a power management system, so that functions of charging, discharging, power consumption management and the like are realized through the power management system.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A battery pack sorting method, wherein the battery pack is a power battery pack of an electric vehicle, the battery pack includes a plurality of single batteries, and the method includes:
respectively obtaining a first voltage value of each single battery in the standing process after the battery pack is recovered;
obtaining a plurality of first voltage difference values according to the plurality of first voltage values, wherein each first voltage difference value is a difference value between any two first voltage values;
when the plurality of first voltage difference values are all larger than or equal to a first difference threshold value, outputting information to be disassembled of the battery pack;
performing a first charge-discharge cycle on the battery pack when any of the first voltage difference values is less than the first difference threshold value;
obtaining a plurality of second voltage difference values according to second voltage values of the single batteries at the final stage of discharge in the first charge-discharge cycle process, wherein each second voltage difference value is a difference value between any two second voltage values;
and outputting battery pack qualification information when the first discharge capacity of the battery pack after the first charge-discharge cycle is larger than a capacity threshold value and the second voltage difference value is smaller than a second difference value threshold value.
2. The method of claim 1, further comprising:
when the first discharge capacity is smaller than or equal to the capacity threshold value or the second voltage difference value is larger than or equal to the second difference value threshold value, performing second charge-discharge circulation on the battery pack;
re-acquiring a third voltage value of each single battery at the final discharge stage of the second charge-discharge cycle process;
obtaining a plurality of third voltage difference values according to the plurality of third voltage values, wherein each third voltage difference value is a difference value between any two third voltage values;
and outputting the information of the battery pack to be disassembled when the third voltage difference value meets a second preset condition.
3. The method of claim 2, further comprising:
after the second charge-discharge cycle is executed, a second discharge capacity in the battery pack is obtained;
when the third voltage difference satisfies a second preset condition, outputting information to be disassembled of the battery pack, including:
and when the second discharge capacity is larger than the capacity threshold value and the third voltage difference value is smaller than the second difference value threshold value, outputting information to be disassembled of the battery pack.
4. The method of claim 3, further comprising:
and when the second discharge capacity is smaller than or equal to the capacity threshold value or the third voltage difference value is larger than or equal to the second difference value threshold value, outputting battery pack qualification information.
5. The method of claim 2, wherein prior to performing the second charge-discharge cycle on the battery pack, comprising:
configuring an equalizing voltage value for the single batteries of the battery pack;
the performing a second charge-discharge cycle on the battery pack includes:
and carrying out equalizing charge on each single battery respectively according to the equalizing voltage value so as to execute the second charge-discharge cycle.
6. A battery pack sorting apparatus, wherein the battery pack is a power battery pack of an electric vehicle, the battery pack includes a plurality of single batteries, the apparatus comprises:
the acquisition module is used for respectively acquiring a first voltage value of each single battery in the standing process after the battery pack is recovered;
the calculation module is used for acquiring a plurality of first voltage difference values according to the plurality of first voltage values, wherein each first voltage difference value is a difference value between any two first voltage values; when a first charge-discharge cycle is executed on the battery pack, obtaining a plurality of second voltage difference values according to second voltage values of the single batteries at the final discharge stage of the first charge-discharge cycle process, wherein each second voltage difference value is the difference value between any two second voltage values;
the output module is used for outputting information to be disassembled of the battery pack when the plurality of first voltage difference values are all larger than or equal to a first difference threshold value; performing a first charge-discharge cycle on the battery pack when any of the first voltage difference values is less than the first difference threshold value; and outputting qualified information of the battery pack when the first discharge capacity of the battery pack after the first charge-discharge cycle is larger than a capacity threshold value and the second voltage difference value is smaller than a second difference value threshold value.
7. The apparatus according to claim 6, wherein the acquiring module is further configured to, when a second charge-discharge cycle is performed on the battery pack, reacquire a third voltage value of each of the single batteries at a discharge end of the second charge-discharge cycle;
the calculation module is further configured to obtain a plurality of third voltage difference values according to the plurality of third voltage values, where each third voltage difference value is a difference value between any two third voltage values;
the output module is further configured to perform a second charge-discharge cycle on the battery pack when the first discharge capacity is less than or equal to the capacity threshold, or the second voltage difference is greater than or equal to the second difference threshold; and outputting the information that the battery pack is to be disassembled when the third voltage difference value meets a second preset condition.
8. The apparatus of claim 7, wherein the collecting module is further configured to obtain a second discharge capacity in the battery pack after performing the second charge-discharge cycle;
the output module is further configured to output information to be disassembled of the battery pack when the second discharge capacity is greater than the capacity threshold and the third voltage difference is less than the second difference threshold.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352433.3A CN113210299B (en) | 2021-03-31 | 2021-03-31 | Battery pack sorting method, apparatus, computer device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352433.3A CN113210299B (en) | 2021-03-31 | 2021-03-31 | Battery pack sorting method, apparatus, computer device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113210299A CN113210299A (en) | 2021-08-06 |
| CN113210299B true CN113210299B (en) | 2023-01-24 |
Family
ID=77086209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110352433.3A Active CN113210299B (en) | 2021-03-31 | 2021-03-31 | Battery pack sorting method, apparatus, computer device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113210299B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577687B (en) * | 2023-07-14 | 2024-04-19 | 南昌航空大学 | Cell screening method and system for quick-charging battery pack, storage medium and computer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138019A (en) * | 2013-01-28 | 2013-06-05 | 佛山市邦普循环科技有限公司 | Waste energy echelon utilization method of power battery for electric vehicle |
| CN103316852A (en) * | 2013-05-24 | 2013-09-25 | 上海中聚佳华电池科技有限公司 | Battery selecting method |
| CN106785178A (en) * | 2017-03-16 | 2017-05-31 | 许继电源有限公司 | Battery modules recycle detection, screening method for group matching and device |
| CN107457194A (en) * | 2016-06-02 | 2017-12-12 | 上海国际汽车城（集团）有限公司 | A kind of power battery core echelon utilizes and screens method for group matching |
| CN110797591A (en) * | 2019-10-29 | 2020-02-14 | 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 |
| CN111001588A (en) * | 2019-11-01 | 2020-04-14 | 安徽绿沃循环能源科技有限公司 | Battery pack echelon recycling method |
| CN111036584A (en) * | 2019-11-19 | 2020-04-21 | 中国电力科学研究院有限公司 | Retired battery sorting method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10957946B2 (en) * | 2019-08-13 | 2021-03-23 | International Business Machines Corporation | Capacity degradation analysis for batteries |
-
2021
- 2021-03-31 CN CN202110352433.3A patent/CN113210299B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138019A (en) * | 2013-01-28 | 2013-06-05 | 佛山市邦普循环科技有限公司 | Waste energy echelon utilization method of power battery for electric vehicle |
| CN103316852A (en) * | 2013-05-24 | 2013-09-25 | 上海中聚佳华电池科技有限公司 | Battery selecting method |
| CN107457194A (en) * | 2016-06-02 | 2017-12-12 | 上海国际汽车城（集团）有限公司 | A kind of power battery core echelon utilizes and screens method for group matching |
| CN106785178A (en) * | 2017-03-16 | 2017-05-31 | 许继电源有限公司 | Battery modules recycle detection, screening method for group matching and device |
| CN110797591A (en) * | 2019-10-29 | 2020-02-14 | 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 |
| CN111001588A (en) * | 2019-11-01 | 2020-04-14 | 安徽绿沃循环能源科技有限公司 | Battery pack echelon recycling method |
| CN111036584A (en) * | 2019-11-19 | 2020-04-21 | 中国电力科学研究院有限公司 | Retired battery sorting method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113210299A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Omariba et al. | Review of battery cell balancing methodologies for optimizing battery pack performance in electric vehicles | |
| CN109856559B (en) | Lithium battery cycle life prediction method | |
| CN110380144B (en) | Mixed coordination control method and system for retired lithium iron phosphate and ternary lithium battery | |
| CN111001588B (en) | Battery pack echelon recycling method | |
| CN107617582B (en) | Echelon utilization screening and grouping method for power cells | |
| US20240348064A1 (en) | Battery Equalization Method and System | |
| CN111289910B (en) | Grading method and device for echelon batteries, computer equipment and medium | |
| CN114384436A (en) | Screening method, device, equipment and storage medium for retired lithium ion power battery | |
| CN112379285B (en) | Battery pack self-discharge screening method | |
| CN114833097A (en) | Sorting method and device for gradient utilization of retired power batteries | |
| CN112098875A (en) | Lithium ion battery lithium analysis detection method | |
| CN111129628B (en) | Control method, system, medium and electronic equipment for lithium ion battery cell charge and discharge | |
| CN112072727A (en) | Battery pack balance control system and control method thereof | |
| CN115061058A (en) | Method and system for measuring and calculating gradient utilization residual life of retired power battery | |
| CN108363016B (en) | Artificial neural network-based battery micro short circuit quantitative diagnosis method | |
| CN113210299B (en) | Battery pack sorting method, apparatus, computer device and storage medium | |
| CN114598008A (en) | Energy storage power supply device, energy storage power supply control method and device and single chip microcomputer | |
| Chang et al. | Experimental assessment of the discharge characteristics of multi-type retired lithium-ion batteries in parallel for echelon utilization | |
| CN116819373A (en) | Grading method and grading system for retired batteries for vehicles | |
| KR20140038622A (en) | Charge and discharge amount distribution apparatus of energy storage system and the method thereof | |
| CN104467064A (en) | Charging station having battery cell balancing system | |
| CN106450551A (en) | Decommissioned nickel-metal hydride battery module screening and recombination system and method for energy storage power station | |
| CN117134008A (en) | Battery pack capacity balancing method, device and system | |
| CN110068409B (en) | Lithium battery stress prediction method and device | |
| KR20210154027A (en) | Apparatus and method for diagnosing state of battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |