CN109116259A - Cycle life of lithium ion battery prediction technique, equipment, system and storage medium - Google Patents
Cycle life of lithium ion battery prediction technique, equipment, system and storage medium Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of cycle life of lithium ion battery prediction technique, equipment, system and storage medium, this method comprises: the corresponding capacity retention ratio of lithium ion battery of the different charge and discharge cycles number of detection；Disassembled to obtain the powder on pole piece to the lithium ion battery of the different charge and discharge cycles number；Detect the corresponding atom mixing degree of powder on each pole piece；First function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree；Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；The cycle life of the lithium ion battery is determined by the first function and the second function according to the given threshold of the capacity retention ratio of the lithium ion battery.Time needed for the embodiment of the present invention significantly reduces routine test, and effectively prevent the wasting of resources.
Description
Technical field
The present invention relates to battery detecting field, in particular to cycle life of lithium ion battery prediction technique, equipment, system and
Storage medium.
Background technique
The service life of battery is to measure the important indicator of battery performance, and with the high speed development of battery technology, battery is followed
The ring service life has reached 2000 times even 2500 times or more.Lithium ion battery is because its is environmental-friendly, pollutes small, cycle life
Length does not have the features such as memory effect, is widely used.Currently, during the research and development of lithium ion battery, inspection and type selecting extensively
The life testing method used is loop test to be carried out under certain operating condition, but circulation test algorithm is in the presence of time-consuming, energy consumption
Greatly and the defect that causes research and development of products progress slow.
Inventor has found during realizing technical solution of the embodiment of the present invention: surveying to accelerate battery cycle life
Examination, the prior art, which generally passes through, to be selected quick charge and discharge operating condition and carries out the accelerated test scheme such as testing under high temperature environment, but still
The phenomenon that needing the long period to complete test, and still having the wasting of resources.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of cycle life of lithium ion battery prediction technique, equipment, system and
Storage medium, to solve the problems, such as existing cycle life of lithium ion battery test, there are testing time length and energy consumption are big.
The technical solution of the embodiment of the present invention is achieved in that
In a first aspect, the embodiment of the present invention provides a kind of cycle life of lithium ion battery prediction technique, this method comprises:
Detect the corresponding capacity retention ratio of lithium ion battery of different charge and discharge cycles numbers；
Disassembled to obtain the powder on pole piece to the lithium ion battery of the different charge and discharge cycles number；
Detect the corresponding atom mixing degree of powder on each pole piece, wherein the atom mixing degree refers to by multiple charge and discharge
After electricity in the crystal structure of the powder different metal atomic migration rate；
First function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree；
Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；
According to the given threshold of the capacity retention ratio of the lithium ion battery, pass through the first function and second letter
Number, determines the cycle life of the lithium ion battery.
Second aspect, the embodiment of the present invention provide a kind of cycle life of lithium ion battery forecasting system, which includes:
First detection device, the corresponding capacity of lithium ion battery for detecting different charge and discharge cycles numbers are kept
Rate；
Second detection device, powder is corresponding on the pole piece of the lithium ion battery for detecting different charge and discharge cycles numbers
Atom mixing degree, wherein the atom mixing degree refers to after multiple charge and discharge different in the crystal structure of the powder
The rate of metallic atom migration；
Processing equipment, for generating first according to the corresponding relationship fitting of the capacity retention ratio and the atom mixing degree
Function；Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；According to institute
The given threshold for stating the capacity retention ratio of lithium ion battery determines the lithium by the first function and the second function
The cycle life of ion battery.
The third aspect, the embodiment of the present invention provide a kind of cycle life of lithium ion battery prediction technique, this method comprises:
The first data are received, first data include the corresponding appearance of lithium ion battery of different charge and discharge cycles numbers
Measure conservation rate；
The second data are received, second data include on the pole piece of the lithium ion battery of different charge and discharge cycles numbers
The corresponding atom mixing degree of powder, wherein the atom mixing degree refers to the crystal knot of the powder after multiple charge and discharge
The rate of different metal atomic migration in structure；
First function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree；
Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；
According to the given threshold of the capacity retention ratio of the lithium ion battery, pass through the first function and second letter
Number, determines the cycle life of the lithium ion battery.
Fourth aspect, the embodiment of the present invention provide a kind of pre- measurement equipment of cycle life of lithium ion battery, and the equipment includes
Processor and memory for storing the computer program that can be run on a processor；Wherein,
The processor is for when running the computer program, executing the circulation of lithium ion battery described in previous embodiment
Life-span prediction method.
5th aspect, the embodiment of the present invention provide a kind of storage medium, are stored with computer program in the storage medium,
Cycle life of lithium ion battery prediction technique described in previous embodiment is realized when the computer program is executed by processor.
In the technical solution of the embodiment of the present invention, the pole of the lithium ion battery by obtaining different charge and discharge cycles numbers
The atom mixing degree of on piece powder is fitted according to measured data and generates capacity retention ratio first function relevant to atom mixing degree
And atom mixing degree second function relevant to charge and discharge cycles number, so as to according to the capacity retention ratio of lithium ion battery
Given threshold, the cycle life of the lithium ion battery is determined by first function and second function, reduces loop test
Number, time needed for significantly reducing routine test, and effectively prevent the wasting of resources.
Detailed description of the invention
Fig. 1 is one of the flow diagram of cycle life of lithium ion battery of embodiment of the present invention prediction technique；
Fig. 2 is the relation curve schematic diagram of atom of embodiment of the present invention mixing degree and capacity retention ratio；
Fig. 3 is the relation curve schematic diagram of atom of embodiment of the present invention mixing degree and charge and discharge cycles number；
Fig. 4 is the actual measurement schematic diagram of circulating cycle of embodiment of the present invention number and capacity retention ratio；
Fig. 5 is the structural schematic diagram of cycle life of lithium ion battery of embodiment of the present invention forecasting system；
Fig. 6 is the two of the flow diagram of cycle life of lithium ion battery of embodiment of the present invention prediction technique；
Fig. 7 is the structural schematic diagram of the pre- measurement equipment of cycle life of lithium ion battery of the embodiment of the present invention.
Specific embodiment
The characteristics of in order to more fully hereinafter understand the embodiment of the present invention and technology contents, below in conjunction with Figure of description
And the realization of the embodiment of the present invention is described in detail, appended attached drawing purposes of discussion only for reference, is not used to limit the present invention
Embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in limitation the application.
It should be noted that in embodiments of the present invention, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that including the method for a series of elements or device not only includes wanting of being expressly recited
Element, but also including other elements that are not explicitly listed, or further include for implementation method or device intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Method or device in there is also other relevant factor (such as the step in method or the units in device, such as singly
Member can be partial circuit, segment processor, subprogram or software etc.).
Fig. 1 shows the flow diagram of cycle life of lithium ion battery prediction technique of the embodiment of the present invention, referring to Fig.1,
The present embodiment cycle life of lithium ion battery prediction technique includes:
Step 110, the corresponding capacity retention ratio of lithium ion battery of different charge and discharge cycles numbers is detected.
In the present embodiment, corresponding charge and discharge cycles time are arranged according to the increment of setting respectively in multiple lithium ion batteries
Number, wherein the increment can be equal or unequal；
Detect corresponding electric discharge when discharge capacity value and the charge and discharge cycles number of setting are completed for the first time of each lithium ion battery
Capability value determines the corresponding capacity retention ratio of each lithium ion battery according to the ratio of the two.
Illustratively, the ternary lithium ion battery of good 5 2.5Ah of consistency is chosen, is followed with 150 times for increment increase
Ring number, and cycle-index is between 100~1000 times, according to the cycle-index set to each lithium ion battery respectively into
The test of row cycle performance, and record the capacity retention ratio of every battery, i.e., it is corresponding disposably to obtain 5 lithium ion batteries
Capacity retention ratio saves the testing time compared with different charge and discharge cycles tests are carried out respectively by same battery.Specifically,
Charge and discharge electrical detection device automatically records the discharge capacity value for the first time and setting of each lithium ion battery according to the testing conditions of setting
Charge and discharge cycles number corresponding discharge capacity value when completing, and the corresponding appearance of each lithium ion battery is determined according to the ratio of the two
Conservation rate is measured, and stores the mapping relations between charge and discharge cycles number and capacity retention ratio.
In other optional embodiments, the setting of the charge and discharge cycles number of multiple lithium ion batteries can be according to detection
It needs to be arranged in the way of non-equal increments, to meet the needs of flexibly detecting, to obtain under different charge and discharge cycles numbers
The corresponding capacity retention ratio of lithium ion battery.
Step 120, disassembled to obtain the powder on pole piece to the lithium ion battery of the different charge and discharge cycles number
Material.
By taking anode pole piece as an example, in the present embodiment, the lithium ion battery of the different charge and discharge cycles number is carried out
Dismantling obtains the powder on pole piece, comprising:
Lithium ion battery after capacity retention ratio has been detected is disassembled；
Anode pole piece after dismantling is impregnated to setting duration in organic solution, washes off the electrolysis on the anode pole piece
Matter；
By the anode pole piece drying after cleaning；
The powder on anode pole piece after scraping drying, obtains powder to be detected.
Preferably, multiple lithium ion batteries respectively according to preset different charge and discharge cycles numbers detections after, to each lithium from
Sub- battery broken, it is hereby achieved that powder to be detected corresponding from different number of recharge cycles, is tested using improving
Efficiency.
Specifically, above-mentioned organic solution can be propene carbonate (PC), ethylene carbonate (EC), diethyl carbonate
(DEC), one or more of dimethyl carbonate (DMC) and methyl ethyl ester (EMC).There is anode pole piece after dismantling
The setting duration impregnated in machine solution is usually 30-60 minutes, consequently facilitating washing the electrolyte on anode pole piece.
Step 130, detect the corresponding atom mixing degree of powder on each pole piece, wherein the atom mixing degree refer to by
After multiple charge and discharge in the crystal structure of the powder different metal atomic migration rate.
By taking anode pole piece as an example, in the present embodiment, the powder on each anode pole piece can be carried out by XRD tester former
Sub- mixing degree detection, specifically includes:
Using the corresponding multiple diffraction pattern data of powder on each pole piece of step-by-step movement Scanning Detction；
The atom mixing degree that data fitting determines powder on each pole piece is carried out by the multiple diffraction pattern data.
Specifically, before step-by-step movement scanning, detection parameters are arranged to XRD tester, detection parameters include but is not limited to:
The step-length of step-by-step movement scanning, scanning residence time, scanning range.For example, the step-length that setting step-by-step movement scans is 0.02 °, detection
Residence time is 2s, and scanning range is 10-90 °.
XRD tester carries out data fitting to multiple diffraction pattern data that detection obtains using built-in program, for example,
Full _ pattern fitting calculating is carried out with Rietveld method and computer program, determines atom mixing degree from Occupation probability.XRD is surveyed
Examination instrument saves the charge and discharge cycles number of each lithium ion battery and the mapping relations of atom mixing degree.
Step 140, first function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree.
, can be by a calculating treatmenting equipment in the present embodiment, receive the preservation of charge and discharge electrical detection device includes lithium ion
What the data of the mapping relations between charge and discharge cycles number and capacity retention ratio, XRD tester saved includes lithium ion battery
The data of the mapping relations of charge and discharge cycles number and atom mixing degree, based on charge and discharge cycles number establish capacity retention ratio with
The corresponding relationship of atom mixing degree, establishes the relation curve of capacity retention ratio Yu atom mixing degree, and first function relationship can be
Linear relationship, as shown in Fig. 2, obtaining first function y by fitting algorithm1=-0.0456x1+ 0.0458, wherein x1For capacity
Conservation rate, y1For atom mixing degree.
Step 150, second is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number
Function.
In the present embodiment, two are established according to the corresponding relationship of atom mixing degree and charge and discharge cycles number (i.e. circulating cycle number)
The relation curve of person, second function can be linear relationship, as shown in figure 3, obtaining second function y by fitting algorithm2=
194000x2- 70, wherein x2For atom mixing degree, y2For charge and discharge cycles number.
Step 160, according to the given threshold of the capacity retention ratio of the lithium ion battery, pass through the first function and institute
Second function is stated, determines the cycle life of the lithium ion battery.
In the present embodiment, by taking given threshold is 80% as an example, by the given threshold of capacity retention ratio substitute into first function and
In the governing equation of second function, it can predict that the cycle life of lithium ion battery is 1738 times.Experiment proves that with to pre-
It surveys in the actual test of same batch battery, cycle life when capacity retention ratio is 80.2% is 1750 times, as shown in Figure 4.
It can be seen that the cycle life and actual test result of the present embodiment prediction are very close.And the present embodiment is conventional by being less than
After loop test needed for test, it is fitted according to measured data and generates capacity retention ratio first function relevant to atom mixing degree
And atom mixing degree second function relevant to charge and discharge cycles number, so as to according to the capacity retention ratio of lithium ion battery
Given threshold, the cycle life of the lithium ion battery is determined by first function and second function, significantly reduce often
Time needed for rule test, and be conducive to economize on resources.
In an optional embodiment, the given threshold is multiple, the circulation of the determination lithium ion battery
Service life includes: to determine the corresponding different cycle lives of the lithium ion battery according to different given thresholds.
It, can be according to different thresholds when to the threshold requirement difference of the capacity retention ratio of battery in different application scene
The cycle life of value prediction battery, so as to realize that battery is converted after the application scenarios of high threshold requirement are eliminated to low threshold
The service life monitoring being worth in desired application scenarios.Illustratively, when the capacity retention ratio of power battery drops to 80%, reach
The Rejection standard of new-energy automobile power battery, in low-speed vehicle such as electric bicycle, the capacity of power battery is kept
The threshold value of rate is 70%, the direct dismantling after Rejection standard is reached in order to avoid new-energy automobile power battery, is realized waste and old dynamic
The echelon of power battery utilizes, then different cycle life can be arranged according to different threshold values.According to first threshold 80% using this
Embodiment method is predicted to obtain the first circulation service life, predicts to obtain second using the present embodiment method according to second threshold 70% and follow
The ring service life.When power battery recycling reach the first circulation service life when dismantled, and by waste and old power battery convert to
On electric bicycle, and carry out scrapping processing when power battery recycling reaches the second circulation service life.The present embodiment method
Foundation is provided for the service life monitoring that the echelon of battery utilizes, and significantly reduces time caused by routine test and resource wave
Take.
It should be noted that lithium ion battery includes but is not limited in the present embodiment: ternary lithium ion battery, ferric phosphate
Lithium battery, lithium titanate battery, lithium manganate battery, cobalt acid lithium battery.
Referring to Fig. 5, the embodiment of the present invention also provides a kind of cycle life of lithium ion battery forecasting system, which includes:
First detection device 510, the corresponding capacity of lithium ion battery for detecting different charge and discharge cycles numbers are protected
Holdup；
Second detection device 520, powder on the pole piece of the lithium ion battery for detecting different charge and discharge cycles numbers
Corresponding atom mixing degree, wherein the atom mixing degree refers to after multiple charge and discharge in the crystal structure of the powder
The rate of different metal atomic migration；
Processing equipment 530 is fitted for the corresponding relationship according to the capacity retention ratio and the atom mixing degree and generates
First function；Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；Root
Institute is determined by the first function and the second function according to the given threshold of the capacity retention ratio of the lithium ion battery
State the cycle life of lithium ion battery.
In the present embodiment, multiple groups charge and discharge port is provided on the first detection device 510, and the first detection device 510 is pressed
Cycle performance test is carried out respectively to each lithium ion battery according to the cycle-index set, and the capacity for recording every battery is kept
Rate.Specifically, the first detection device 510 automatically records the discharge capacity for the first time of each lithium ion battery according to the testing conditions of setting
Value and the charge and discharge cycles number of setting corresponding discharge capacity value when completing, and each lithium-ion electric is determined according to the ratio of the two
The corresponding capacity retention ratio in pond, and store the mapping relations between charge and discharge cycles number and capacity retention ratio.
In the present embodiment, the second detection device 520 is used for corresponding more using powder on each pole piece of step-by-step movement Scanning Detction
A diffraction pattern data；The atom mixing that data fitting determines powder on each pole piece is carried out by the multiple diffraction pattern data
Degree.Specifically, the second detection device 520 can be that XRD tester is arranged XRD tester and detects before step-by-step movement scanning
Parameter, detection parameters include but is not limited to: the step-length of step-by-step movement scanning, scanning residence time, scanning range.For example, setting step
The step-length scanned into formula is 0.02 °, and detection residence time is 2s, and scanning range is 10-90 °.XRD tester utilizes built-in journey
Multiple diffraction pattern data that ordered pair detects carry out data fitting, for example, with Rietveld method and computer program into
Row Full _ pattern fitting calculates, and determines atom mixing degree from Occupation probability.XRD tester saves the charge and discharge of each lithium ion battery
The mapping relations of cycle-index and atom mixing degree.
In the present embodiment, processing equipment 530 can be established between the first detection device 510, the second detection device 520 to be had
Line or wireless telecommunications connection.Processing equipment 530 receives the secondary comprising lithium ion charge and discharge cycles of the first detection device 510 preservation
The charge and discharge cycles comprising lithium ion battery that the data of mapping relations between several and capacity retention ratio, the second detection device save
The data of the mapping relations of number and atom mixing degree；Capacity retention ratio and atom mixing degree are established according to charge and discharge cycles number
Corresponding relationship, establish the relation curve of capacity retention ratio Yu atom mixing degree, first function obtained by fitting algorithm；According to
The corresponding relationship of atom mixing degree and charge and discharge cycles number establishes the relation curve of the two, obtains the second letter by fitting algorithm
Number；According to the given threshold of the capacity retention ratio of the lithium ion battery, by the first function and the second function, really
The cycle life of the fixed lithium ion battery.
Referring to Fig. 6, the embodiment of the present invention provides a kind of cycle life of lithium ion battery prediction technique, this method comprises:
Step 610, the first data are received, first data include the lithium ion battery of different charge and discharge cycles numbers
Corresponding capacity retention ratio.
Step 620, the second data are received, second data include the lithium ion battery of different charge and discharge cycles numbers
Pole piece on the corresponding atom mixing degree of powder, wherein the atom mixing degree refers to the powder after multiple charge and discharge
Crystal structure in different metal atomic migration rate.
Step 630, first function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree.
Step 640, second is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number
Function.
Step 650, according to the given threshold of the capacity retention ratio of the lithium ion battery, pass through the first function and institute
Second function is stated, determines the cycle life of the lithium ion battery.
Optionally, in step 650, the given threshold is multiple, the cycle life of the determination lithium ion battery
It include: that the corresponding different cycle lives of the lithium ion battery are determined according to different given thresholds.
The embodiment of the present invention provides a kind of cycle life of lithium ion battery prediction meanss, the battery cycle life prediction meanss
It can be implemented using computer equipment, as shown in fig. 7, to implement the computer equipment of cycle life of lithium ion battery prediction meanss
An optional hardware structural diagram, which includes:
First receiving module 710, for receiving the first data, first data include different charge and discharge cycles numbers
The corresponding capacity retention ratio of lithium ion battery；
Second receiving module 720, for receiving the second data, second data include different charge and discharge cycles numbers
Lithium ion battery pole piece on the corresponding atom mixing degree of powder, wherein the atom mixing degree refers to by multiple charge and discharge
After electricity in the crystal structure of the powder different metal atomic migration rate；
First function generation module 730, for the corresponding relationship according to the capacity retention ratio and the atom mixing degree
Fitting generates first function；
Second function generation module 740, for corresponding with the charge and discharge cycles number according to the atom mixing degree
Relationship fitting generates second function；
Determining module 750 passes through described first for the given threshold according to the capacity retention ratio of the lithium ion battery
Function and the second function, determine the cycle life of the lithium ion battery.
Optionally, the given threshold is multiple, and determining module 750 is used for according to different given thresholds, determine described in
The corresponding different cycle lives of lithium ion battery.
In practical applications, each module in described device, can by be located at described device in central processing unit (CPU,
Central Processing Unit), microprocessor (MPU, Microprocessor Unit), digital signal processor
(DSP, Digital Signal Processor) or field programmable gate array (FPGA, Field-Programmable
Gate Array) etc. realize.
The embodiment of the present invention provides a kind of pre- measurement equipment of cycle life of lithium ion battery, the pre- measurement equipment of the battery cycle life
It can be implemented using computer equipment, as shown in fig. 7, optional to implement one of the pre- measurement equipment of cycle life of lithium ion battery
Hardware structural diagram, the pre- measurement equipment of the cycle life of lithium ion battery include: processor 701 and can handle for storing
The memory 702 of the computer program run on device 701；Wherein, processor 701 is for receiving the when running computer program
One data, first data include the corresponding capacity retention ratio of lithium ion battery of different charge and discharge cycles numbers；It receives
Second data, second data include the corresponding original of powder on the pole piece of the lithium ion battery of different charge and discharge cycles numbers
Sub- mixing degree, wherein the atom mixing degree refers to after multiple charge and discharge different metal in the crystal structure of the powder
The rate of atomic migration；The first letter is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree
Number；Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；According to described
The given threshold of the capacity retention ratio of lithium ion battery, by the first function and the second function, determine the lithium from
The cycle life of sub- battery.
In one embodiment, the pre- measurement equipment of the cycle life of lithium ion battery further include: at least one network interface
703.Various components in the equipment are coupled by bus system 704.It is understood that bus system 703 is for realizing this
Connection communication between a little components.Bus system 704 except include data/address bus in addition to, further include power bus, control bus and
Status signal bus in addition.But for the sake of clear explanation, various buses are all designated as bus system 704 in Fig. 7.
The embodiment of the present invention also provides a kind of storage medium, is stored with computer program in storage medium, the computer journey
When sequence is run by processor, the first data are received, first data include the lithium-ion electric of different charge and discharge cycles numbers
The corresponding capacity retention ratio in pond；The second data are received, second data include the lithium ion of different charge and discharge cycles numbers
The corresponding atom mixing degree of powder on the pole piece of battery, wherein the atom mixing degree refers to described after multiple charge and discharge
The rate of different metal atomic migration in the crystal structure of powder；According to the capacity retention ratio and the atom mixing degree
Corresponding relationship fitting generates first function；It is fitted according to the corresponding relationship of the atom mixing degree and the charge and discharge cycles number
Generate second function；According to the given threshold of the capacity retention ratio of the lithium ion battery, by the first function and described
Second function determines the cycle life of the lithium ion battery.
The storage medium can be FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface storage,
The memories such as CD or CD-ROM；Be also possible to include one of above-mentioned memory or any combination various equipment, such as mobile electricity
Words, tablet device, wearable device etc..
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is merely the specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all cover
Within protection scope of the present invention.Protection scope of the present invention should be with the scope of protection of the claims with standard.
Claims (10)
1. a kind of cycle life of lithium ion battery prediction technique characterized by comprising
Detect the corresponding capacity retention ratio of lithium ion battery of different charge and discharge cycles numbers；
Disassembled to obtain the powder on pole piece to the lithium ion battery of the different charge and discharge cycles number；
Detect the corresponding atom mixing degree of powder on each pole piece, wherein the atom mixing degree refers to after multiple charge and discharge
The rate of different metal atomic migration in the crystal structure of the powder；
First function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree；
Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；
According to the given threshold of the capacity retention ratio of the lithium ion battery, by the first function and the second function,
Determine the cycle life of the lithium ion battery.
2. cycle life of lithium ion battery prediction technique as described in claim 1, which is characterized in that the detection is different to fill
The corresponding capacity retention ratio of the lithium ion battery of discharge cycles number, comprising:
Corresponding charge and discharge cycles number is arranged according to the increment of setting in multiple lithium ion batteries, wherein the increment is equal
Or differ；
Detect each lithium ion battery corresponding discharge capacity when discharge capacity value and the charge and discharge cycles number of setting are completed for the first time
Value, determines the corresponding capacity retention ratio of each lithium ion battery according to the ratio of the two.
3. cycle life of lithium ion battery prediction technique as described in claim 1, which is characterized in that on each pole piece of detection
The corresponding atom mixing degree of powder, comprising:
Detect to obtain the corresponding atom mixing degree of powder on each pole piece through X-ray diffraction XRD.
4. cycle life of lithium ion battery prediction technique as claimed in claim 3, which is characterized in that described through X-ray diffraction
XRD detects to obtain the corresponding atom mixing degree of powder on each pole piece, comprising:
Using the corresponding multiple diffraction pattern data of powder on each pole piece of step-by-step movement Scanning Detction；
The atom mixing degree that data fitting determines powder on each pole piece is carried out by the multiple diffraction pattern data.
5. cycle life of lithium ion battery prediction technique as described in claim 1, which is characterized in that described to described different
The lithium ion battery of charge and discharge cycles number is disassembled to obtain the powder on pole piece, comprising:
Lithium ion battery after capacity retention ratio has been detected is disassembled；
Anode pole piece after dismantling is impregnated to setting duration in organic solution, washes off the electrolyte on the anode pole piece；
By the anode pole piece drying after cleaning；
The powder on anode pole piece after scraping drying, obtains powder to be detected.
6. cycle life of lithium ion battery prediction technique as described in claim 1, which is characterized in that the given threshold is more
A, the cycle life of the determination lithium ion battery includes:
According to different given thresholds, by the first function and the second function, determine that the lithium ion battery is corresponding
Different cycle lives.
7. a kind of cycle life of lithium ion battery forecasting system characterized by comprising
First detection device, for detecting the corresponding capacity retention ratio of lithium ion battery of different charge and discharge cycles numbers；
Second detection device, the corresponding original of powder on the pole piece of the lithium ion battery for detecting different charge and discharge cycles numbers
Sub- mixing degree, wherein the atom mixing degree refers to after multiple charge and discharge different metal in the crystal structure of the powder
The rate of atomic migration；
Processing equipment, for generating the first letter according to the corresponding relationship fitting of the capacity retention ratio and the atom mixing degree
Number；Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；According to described
The given threshold of the capacity retention ratio of lithium ion battery, by the first function and the second function, determine the lithium from
The cycle life of sub- battery.
8. a kind of cycle life of lithium ion battery prediction technique characterized by comprising
The first data are received, first data include that the corresponding capacity of lithium ion battery of different charge and discharge cycles numbers is protected
Holdup；
The second data are received, second data include powder on the pole piece of the lithium ion battery of different charge and discharge cycles numbers
Corresponding atom mixing degree, wherein the atom mixing degree refers to after multiple charge and discharge in the crystal structure of the powder
The rate of different metal atomic migration；
First function is generated according to the fitting of the corresponding relationship of the capacity retention ratio and the atom mixing degree；
Second function is generated according to the fitting of the corresponding relationship of the atom mixing degree and the charge and discharge cycles number；
According to the given threshold of the capacity retention ratio of the lithium ion battery, by the first function and the second function,
Determine the cycle life of the lithium ion battery.
9. a kind of pre- measurement equipment of cycle life of lithium ion battery, which is characterized in that the equipment includes processor and for storing
The memory for the computer program that can be run on a processor；Wherein,
The processor is for when running the computer program, executing the lithium ion battery circulation longevity as claimed in claim 8
Order prediction technique.
10. a kind of storage medium, which is characterized in that be stored with computer program, the computer program in the storage medium
Cycle life of lithium ion battery prediction technique according to any one of claims 8 is realized when being executed by processor.
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