CN107976636A - Method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction - Google Patents
Method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction Download PDFInfo
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Abstract
A kind of method and system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, the battery especially lithium battery, the described method comprises the following steps：A, the part charge and discharge electrical measurement data curve for including multiple discrete sampling point datas of the battery is obtained；B, the starting point of part charge and discharge electrical measurement data curve Global center reference data curve relatively set in advance is determined；C, the part charge and discharge electrical measurement data curve and a plurality of stepping center reference data and curves set in advance are utilized, by linearly rebuild or least square rebuild, determine curve of approximation, and according to the starting point of the curve of approximation and part charge and discharge electrical measurement data curve Global center reference data curve relatively set in advance, the charge and discharge electrical measurement data curve of remainder of the polishing in addition to the part charge and discharge electrical measurement data curve, so as to rebuild complete charge and discharge electrical measurement data curve.This method can accurately rebuild complete discharge and recharge data and curves using part charge and discharge electrical measurement data.
Description
Technical field
The present invention relates to the production and test of secondary cell, particularly a kind of part discharge and recharge data based on secondary cell
Rebuild the method and system of complete discharge and recharge data.
Background technology
Production and test process in secondary cell such as lithium battery, such as in partial volume and stepping stage, it is necessary to each electricity
Core does multiple charge-discharge test to obtain the discharge and recharge data of completion.In the partial volume technique, lithium battery first passes through
Chemical conversion and aging technique, still have part electricity in lithium cell, and partial volume technique first has to first do constant-current constant-voltage charging to lithium cell, will
Battery core state-of-charge is filled to 100%, and then carrying out constant-current discharge to battery reaches blanking voltage, to obtain complete discharge data
Curve, carries out constant-current constant-voltage charging up to 100% state-of-charge after standing a period of time and obtains complete charge data curve.
Usually reach requirement of dispatching from the factory, a partial discharge is carried out to lithium cell until state-of-charge reaches requirement of dispatching from the factory again.Therefore
General partial volume technique needs at least 1.5 charge and discharge cycles, and some partial volume techniques are even required in different charging and discharging currents
Following multiple charge and discharge cycles.Complete discharge and recharge data will be used for battery charge capacity estimation, discharge capacity estimation, constant current
Constant pressure ratio, partial volume or stepping, DCIR internal resistances estimation etc..Need about that two to three are small usual one complete charge and discharge cycles time
When or so, depending on lithium battery production technology such as time of repose length etc..
The content of the invention
It is a primary object of the present invention in view of the deficiencies of the prior art, there is provided a kind of part charge and discharge based on secondary cell
The method and system of the electric complete discharge and recharge data of data reconstruction, complete discharge and recharge can be rebuild using part charge and discharge electrical measurement data
Data and curves, shorten the time of the techniques such as partial volume, stepping, improve production efficiency.
To achieve the above object, the present invention uses following technical scheme：
A kind of method based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, the battery especially lithium electricity
Pond, the described method comprises the following steps：
A, the part charge and discharge electrical measurement data curve for including multiple discrete sampling point datas of the battery is obtained；
B, part charge and discharge electrical measurement data curve Global center reference data curve relatively set in advance is determined
Starting point；
C, using the part charge and discharge electrical measurement data curve and a plurality of stepping center reference data and curves set in advance,
By linearly rebuilding or least square is rebuild, curve of approximation is determined, and according to the curve of approximation and the part discharge and recharge
The starting point of measurement data curve Global center reference data curve relatively set in advance, polishing remove the part charge and discharge
The charge and discharge electrical measurement data curve of remainder outside electrical measurement data curve, so as to rebuild complete charge and discharge electrical measurement data
Curve.
Further, step A includes pre-processing the part charge and discharge electrical measurement data curve, the pretreatment bag
Include following steps：
A1, carry out the multiple discrete sampling point data fast Fourier (FFT) conversion, and time domain data is transformed to frequency
Domain；
A2, carry out frequency domain data windowing process progress smothing filtering；
A3, carry out zero padding interpolation to filtered frequency domain data, makes its sample rate bent with the Global center reference data
Line and the data sampling rate of the stepping center reference data and curves are consistent；
A4, by the transform frequency domain data after the smothing filtering and the interpolation to time domain.
Further, in step B, by finding the part charge and discharge electrical measurement data in sliding window set in advance
Curve and the least absolute value of the difference of the Global center reference data curve, to determine the part charge and discharge electrical measurement data
The starting point of the relatively described Global center reference data curve of curve.
Further, step B includes：
B1, using the set point on the Global center reference data curve as starting point, corresponding to sampling sequence number w, take and set
Corresponding measurement data subtraction calculations difference on the one piece of data of measured length, with the part charge and discharge electrical measurement data curve, will
Difference after subtracting each other adds up and calculates the absolute value of accumulated value, and wherein w is initialized as 1；
B2, by the absolute value of the accumulated value calculated in step B1 and the difference minimum value e_min for being initially set maximal number
Compare, if less than e_min, then the absolute value using e_min as the accumulated value calculated in step B1；
B3, the renewal starting point, by w plus 1, if w is more than the size of the sliding window, and terminate, otherwise return
Step B1.
Further, step C comprises the following steps：
C11. by the part charge and discharge electrical measurement data curve respectively with a plurality of stepping center reference data and curves
Each matched, determine and the stepping center reference data of part charge and discharge electrical measurement data curve difference value minimum song
Line；
C12. by the use of the stepping center reference data that step C11 is determined as curve of approximation, according to the starting point, by described in
The charge and discharge electrical measurement data curve of remainder described in polishing, it is bent to rebuild complete charge and discharge electrical measurement data after curve of approximation translation
Line.
Further, step C comprises the following steps：
C21. gone to approach the part charge and discharge electrical measurement data curve with a plurality of stepping center reference data and curves, really
Surely the optimal coefficient for minimizing the quadratic sum of approximate error；
C22. according to the optimal coefficient, curve of approximation is established using a plurality of stepping center reference data and curves, will
The charge and discharge electrical measurement data curve of remainder described in polishing, rebuilds complete charge and discharge electrical measurement number after the curve of approximation translation
According to curve.
Further, in step C21,
If a plurality of stepping center reference data and curves are L bar curves, if every stepping center reference data and curves have N
A discrete sampling point data,
Part charge and discharge electrical measurement data comprising N number of discrete sampling point data is with vector
Completely discharge and recharge data are M of l stepping center reference data and curves with vector
rl=[rl(1) … rl(N-1)rl(N) … rl(M)]T
The matrix of L × M of L bar steppings reference data composition is
L bar stepping reference datas are respectively with pstdFor starting point, the matrix of the L × N for the data composition that length is N is
If undetermined coefficient vector is h=[h (1) ... h (L)]T, least square approximation is carried out with equation below
Optimal coefficient h is solved to
After determining optimal coefficient, the approximating curve rebuild using L bar stepping center references data and curves is
Further, the Global center reference data curve and a plurality of stepping center reference data and curves are according to electricity
The material and production technology in pond are preset.
A kind of computer-readable recording medium, is stored thereon with computer program, and the computer program is held by processor
The method based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction is realized during row.
A kind of system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, including：
Processor；And
Memory, for storing the executable instruction of the processor；
Wherein, the processor is configured to perform via the executable instruction is performed described is filled based on battery compartment
The method that discharge data rebuilds complete discharge and recharge data.
Beneficial effects of the present invention：
In order to shorten the time of the techniques such as partial volume, inner walkway, production efficiency is improved, the present invention provides one kind and is based on part
The method of the complete discharge and recharge data of discharge and recharge data reconstruction.The method of the present invention is based on reference data curve set in advance, only
Charge and discharge electrical measurement data in part need to be utilized high-precision can to rebuild complete discharge and recharge data and curves.The method of the present invention is applied to
During partial volume technique, the lithium cell with part electricity need to only be charged to fullcharging electricity condition, subsequent section electric discharge reaches requirement of dispatching from the factory, i.e.,
Using the complete discharge and recharge data and curves of data reconstruction of part charging and partial discharge, to complete follow-up charge/discharge capacity
Estimation and battery stepping, eliminate the circulation of middle once complete discharge and recharge, shorten for more than 50% time, substantially increase
Production efficiency.
The foregoing feature and technical advantage for quite widely having elaborated the present invention, so as to more fully understand this hair
Bright detailed description.The further feature and advantage of the present invention will be described below.
Brief description of the drawings
Fig. 1 is according to a kind of based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction of the embodiment of the present invention
Schematic diagram；
Fig. 2 is the data prediction flow chart according to the embodiment of the present invention；
Fig. 3 is to rebuild flow chart according to the linear of the embodiment of the present invention；
Fig. 4 is the stepping center reference curve map according to the embodiment of the present invention；
During Fig. 5 is the complete constant-current discharge curve of certain battery and utilizes the partial discharge curve of the battery according to the present invention
Contrast between the complete discharge curve that method for reconstructing is rebuild；
Fig. 6 be battery complete constant-current discharge curve with using part constant-current discharge curve according to the present invention in linear weight
Square error between the complete constant-current discharge curve that construction method is rebuild；
Fig. 7 be battery complete constant-current discharge curve with using part constant-current discharge curve according to the present invention in a most young waiter in a wineshop or an inn
Multiply the square error between the complete constant-current discharge curve of method for reconstructing reconstruction；
Fig. 8 is the system according to the embodiment of the present invention, and wherein processor is configured to hold via the execution of memory storage
Row is instructed to perform the method based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction.
Embodiment
Elaborate below to embodiments of the present invention.It is emphasized that what the description below was merely exemplary,
The scope being not intended to be limiting of the invention and its application.
The present invention is described in further detail with reference to attached drawing by the following examples.It is it is emphasized that following
Illustrate what is be merely exemplary, the scope being not intended to be limiting of the invention and its application.It should be appreciated by those skilled in the art that
The concept and specific embodiment of disclosure are used for changing or design other structures to complete based on being easily used as
The identical purpose of the present invention.Those skilled in the art are not it should also be appreciated that this equivalent construction offsets the present invention's
Spirit and scope.Be considered as the novel features of feature of the present invention, its structure and operation method, and further purpose and
Advantage, will be better understood when from following description and with reference to attached drawing.However, it should profoundly recognize, there is provided each spy
Sign is all merely to description and explanation, the definition without being intended to the limitation present invention.
It is in one embodiment, a kind of based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction refering to Fig. 1
Method, the battery especially lithium battery, the described method comprises the following steps：
Step A, the part charge and discharge electrical measurement data curve for including multiple discrete sampling point datas of the battery is obtained；
Step B, determine that part charge and discharge electrical measurement data curve Global center reference data relatively set in advance is bent
The starting point of line；
Step C, the part charge and discharge electrical measurement data curve and a plurality of stepping center reference data set in advance are utilized
Curve, by linearly rebuild or least square rebuild, determine curve of approximation, and fill according to the curve of approximation and the part
The starting point of discharge measuring data and curves Global center reference data curve relatively set in advance, polishing remove the part
The charge and discharge electrical measurement data curve of remainder outside charge and discharge electrical measurement data curve, so as to rebuild complete charge and discharge electrical measurement
Data and curves.
In various embodiments, charge and discharge electrical measurement data curve can be but not limited to constant-current charge voltage-time curve,
Constant-current discharge voltage-time curve, constant-voltage charge current versus time curve, constant-current charge current versus time curve etc..
Refering to Fig. 1 and Fig. 2, in a preferred embodiment, step A includes carrying out the part charge and discharge electrical measurement data curve
Pretreatment, the pretreatment comprise the following steps：
Step A1, fast Fourier (FFT) conversion is carried out to the multiple discrete sampling point data, time domain data is converted
To frequency domain；
Step A2, windowing process is carried out to frequency domain data and carries out smothing filtering；
Step A3, zero padding interpolation is carried out to filtered frequency domain data, makes its sample rate and the Global center reference number
Data sampling rate according to curve and the stepping center reference data and curves is consistent；
Step A4, by the transform frequency domain data after the smothing filtering and the interpolation to time domain.
In a preferred embodiment, in step B, by finding the part charge and discharge electrical measurement in sliding window set in advance
The least absolute value of data and curves and the difference of the Global center reference data curve is measured, to determine the part charge and discharge electrical measurement
Measure the starting point of the relatively described Global center reference data curve of data and curves.
In a further preferred embodiment, step B includes：
Step B1, using the set point on the Global center reference data curve as starting point, corresponding to sampling sequence number w,
The one piece of data of setting length is taken, it is poor with the corresponding measurement data subtraction calculations on the part charge and discharge electrical measurement data curve
Value, the difference after subtracting each other is added up and calculates the absolute value of accumulated value, wherein w is initialized as 1；
Step B2, by the absolute value of the accumulated value calculated in step B1 and the difference minimum value e_ for being initially set maximal number
Min compares, if less than e_min, then the absolute value using e_min as the accumulated value calculated in step B1；
Step B3, the starting point is updated, w plus 1 if w is more than the size of the sliding window, and terminates, otherwise
Return to step B1.
In an advantageous embodiment, step C comprises the following steps：
Step C11. is bent with a plurality of stepping center reference data respectively by the part charge and discharge electrical measurement data curve
Each in line is matched, and determines the stepping center reference number with the part charge and discharge electrical measurement data curve difference value minimum
According to curve；
Step C12., will according to the starting point by the use of the stepping center reference data that step C11 is determined as curve of approximation
The charge and discharge electrical measurement data curve of remainder described in polishing, rebuilds complete charge and discharge electrical measurement number after the curve of approximation translation
According to curve.
In another preferred embodiment, step C comprises the following steps：
Step C21. is gone to approach the part charge and discharge electrical measurement data song with a plurality of stepping center reference data and curves
Line, determines the optimal coefficient for minimizing the quadratic sum of approximate error；
Step C22. is established approximate bent according to the optimal coefficient using a plurality of stepping center reference data and curves
Line, the charge and discharge electrical measurement data curve of remainder described in polishing, rebuilds complete discharge and recharge after the curve of approximation is translated
Measurement data curve.
In a further preferred embodiment, in step C21,
If a plurality of stepping center reference data and curves are L bar curves, if every stepping center reference data and curves have N
A discrete sampling point data,
Part charge and discharge electrical measurement data comprising N number of discrete sampling point data is with vector
Completely discharge and recharge data are M of l stepping center reference data and curves with vector
rl=[rl(1) … rl(N-1)rl(N) … rl(M)]T
The matrix of L × M of L bar steppings reference data composition is
L bar stepping reference datas are respectively with pstdFor starting point, the matrix of the L × N for the data composition that length is N is
If undetermined coefficient vector is h=[h (1) ... h (L)]T, least square approximation is carried out with equation below
Optimal coefficient h is solved to
After determining optimal coefficient, the approximating curve rebuild using L bar stepping center references data and curves is
In a preferred embodiment, the Global center reference data curve and a plurality of stepping center reference data and curves
Preset according to the material of battery and production technology.
Refering to Fig. 8, in another embodiment, a kind of computer-readable recording medium, such as memory, are stored thereon with meter
Calculation machine program, when the computer program is executed by processor realize according to foregoing any embodiment based on battery compartment
The method of the complete discharge and recharge data of discharge and recharge data reconstruction.
Refering to Fig. 8, in another embodiment, one kind is based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction
System, including：
Processor；And
Memory, for storing the executable instruction of the processor；
Wherein, the processor is configured to perform according to foregoing any embodiment institute via the executable instruction is performed
The method based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction stated.
In order to shorten the time of the techniques such as partial volume, stepping, production efficiency is improved, the embodiment of the present invention proposes above-mentioned base
In the method and system of the complete discharge and recharge data of part discharge and recharge data reconstruction.The present invention is bent based on reference data set in advance
Line, need to only utilize charge and discharge electrical measurement data in part high-precision can rebuild complete discharge and recharge data and curves.The system is applied to
During partial volume technique, the lithium cell with part electricity need to only be charged to 100% state-of-charge, subsequent section electric discharge is wanted up to dispatching from the factory
Ask, you can using the complete discharge and recharge data and curves of data reconstruction of part charging and partial discharge, to complete follow-up charge and discharge
Capacitance estimates and battery stepping, eliminates the circulation of middle once complete discharge and recharge, shortens for more than 50% time, significantly
Improve production efficiency.
The feature and its advantage of the specific embodiment of the invention elaborated further below.
1st, part charge and discharge electrical measurement data is pre-processed
If charge and discharge electrical measurement data in part includes K discrete sampling point { sk, k=0,2 ... K-1
1) fast Fourier (FFT) conversion is carried out to K measurement data, time-domain signal is transformed into frequency domain
Wherein k is discrete frequency point sequence number.
2) windowing process is carried out to frequency-region signal and carries out smothing filtering, be such as superimposed raised cosine (raised cosine) window
The frequency spectrum of raised cosine window, β are cutoff frequency
Rate, T are amplitude.
3) sample rate is improved to filtered frequency-region signal zero padding interpolation, it is consistent with reference data sample rate
4) time domain is transformed into the frequency domain data after smothing filtering and interpolation
2nd, to the reconstruction of part charge and discharge cycles measurement data
The reconstruction of part charge and discharge electrical measurement data needs to be based on several reference data curves set in advance, including the model
The stepping center reference data and curves of each stepping of Global center reference data curve and lithium battery of lithium battery.These reference numbers
It is closely related according to the material and leading portion production technology of curve and lithium battery, set in advance according to material and technique in process of production
It is fixed.Can it will be understood by those skilled in the art that presetting battery charging and discharging reference data curve according to the material of battery and technique
To be realized using ordinary skill in the art means.
Starting point of the 2.1 estimation part discharge and recharge measurement data curves with respect to reference data curve
The nuance of state-of-charge when starting due to charging and discharging lithium battery, first has to determine measurement data relative to the overall situation
The starting point of center reference data and curves.The method that the present invention proposes to find minimal difference in one section of sliding window calculates measurement
Curve starting point.By finding measurement data curve and the minimum of the difference of Global center reference data curve in sliding window
Absolute value determines starting point of the experiment curv relative to reference curve.Specific method is as follows：
Step S1., using set point as starting point, corresponding to sampling sequence number w, takes setting in Global center reference data curve
The one piece of data of length N, and measurement data subtraction calculations difference, the difference after subtracting each other is added up and calculates the absolute of accumulated value
Value.
Step S2. is by the absolute value of the accumulated value calculated in step S1 and the difference minimum value for being initially set maximal number
eminCompare, if less than emin, then by eminAs the absolute value of the accumulated value calculated in step S1, and record w.
W is added 1 by step S3., if w is more than the size W of sliding window, and is terminated, otherwise return to step S1.
Parameter declaration：
w:It is used for the sampling of the starting point of the data segment compared with measurement data corresponding to Global center reference data curve
Sequence number, is initialized as 1；
N:Measurement data sampled point number；
N-th of sampled point of measurement data；
r0(n)：N-th of sampled point of Global center reference data curve；
W:Sliding window size；
emin：Measurement data curve and the least absolute value of the difference of Global center reference data curve are recorded, is initialized as
Maximal number；
pstd：Minimal difference starting point is recorded in the sampled point sequence number of Global center reference data curve, is initialized as 0.
The pseudocode of algorithm is as follows：
2.2. perfect measurement data and curves are rebuild
1) it is linear to rebuild
In one embodiment, the reconstruction of perfect measurement data is completed by the method linearly rebuild.Linear differential weight
Building is matched respectively with each stepping center reference data and curves using part charge and discharge electrical measurement data curve, finds difference most
Approximation of the small stepping center reference data and curves as measurement data, to rebuild perfect measurement data.
Comprise the following steps that：
Step 1. matches part charge and discharge electrical measurement data curve with each stepping center reference data and curves respectively, seeks
Look for the stepping center reference data and curves with part charge and discharge electrical measurement data difference minimum；
Polishing after approximate curvilinear translation is measured number by step 2. by the use of the stepping center reference data chosen as curve of approximation
According to curve remainder, to rebuild complete measurement data curve.
Parameter declaration：
L:Battery stepping number；
p:It is directed toward with part charge and discharge electrical measurement data curve difference value and minimum stepping center reference data, p initialization
For maximum；
Dmin:Record the minimal difference of part discharge and recharge measurement data curve and stepping center reference data and curves and,
DminIt is initialized as maximum.
Pseudo-code of the algorithm is as follows：
Perfect measurement data after reconstruction are represented by
WhereinTo use m-th of sampled point of the partial data curve after the reconstruction of linear reconstruction method,For portion
Divide m-th of sampled point of charge and discharge electrical measurement data, rp(m) it is and part charge and discharge electrical measurement data curve difference value and minimum point
M-th of sampled point of shelves center reference data.
2) least squares are rebuild
In another embodiment, the reconstruction of perfect measurement data is completed by least square method for reconstructing.A most young waiter in a wineshop or an inn
It is by the use of existing stepping center reference data as substrate, with the song of the criterion reconstruction measurement data of least square to multiply reconstruction
Line.
Least square is rebuild and goes to approach the part charge and discharge electrical measurement number got with L bar stepping center reference data and curves
According to determining optimal coefficient by minimizing with the quadratic sum of the approximate error of part charge and discharge electrical measurement data.Determine most major clique
After number, approximating curve, polishing measurement data curve after approximating curve is translated are rebuild using L bar stepping center references data and curves
Remainder is to rebuild perfect measurement data and curves.
Comprise the following steps that：
If the part charge and discharge electrical measurement data comprising N number of sampled point is with vector representation
If M complete discharge and recharge data of l stepping center reference data and curves are with vector representation
rl=[rl(1) … rl(N-1)rl(N) … rl(M)]T
The matrix of L × M of L bar steppings reference data composition is represented by
L bar stepping reference datas are respectively with pstdThe matrix of the L × N formed for starting point, the data that length is N is represented by
If undetermined coefficient vector is h=[h (1) ... h (L)]T, the mathematic(al) representation of least square approximation is as follows
Optimal coefficient h can be solved to
After determining optimal coefficient, the approximating curve rebuild using L bar stepping center references data and curves is represented by
Polishing measurement data curve remainder is to rebuild perfect measurement data and curves after approximating curve is translated, after reconstruction
Perfect measurement data be represented by
WhereinTo use m-th of sampled point of the partial data curve after the reconstruction of least square reconstruction method,For m-th of sampled point of part charge and discharge electrical measurement data,The approximating curve established for least square method
M-th of sampled point.
Test result
1200 battery samples use same specification lithium cell, 5 grades of battery point, each stepping center reference curve such as Fig. 4 institutes
Show.
Component capacitive equipment uses negative pressure forming probe bed and 5V-300A power cabinets, is carried out at the appointed time with 60A electric currents
Constant-current discharge, measures complete constant-current discharge voltage curve.Using the first half discharge curve of 1200 batteries, this hair is used
Bright method carries out Curve Reconstruction, by reconstructed results and experiment curv results contrast, calculates the evaluated error of reconstruction, and utilize weight
Curve after building carries out stepping.
In terms of result, the method for reconstructing in the present invention has accurately rebuild complete discharge data using partial discharge data,
Using complexity higher least square reconstruction method when, mean square error reaches 5.6E-7, and no battery is by wrong stepping.It is relatively common
Stepping technique, whole stepping cycle time more than 50%, substantially increases production efficiency, has high practical value.
1 mean square error of table and wrong sorting rate
| Mean square error | Mistake sorting rate | |
| Linear reconstruction method | 1.4E-4 | 0.2% |
| Minimum two reconstruction methods | 5.6E-7 | 0% |
It will be understood by those skilled in the art that various illustrative components, blocks, module, circuit and algorithm with reference to described in present disclosure
Step may be implemented as electronic hardware, computer software or both combination.In order to clearly demonstrate this of hardware and software
Interchangeability, the above generally describe various Illustrative components, module, module, circuit and step in terms of its function.
This function is by hardware or software implementation, depending on applying application-specific and design constraint over the whole system.Technology
Personnel can be implemented in various ways the function for each application-specific, but this implementation decision is not necessarily to be construed as partially
From the scope of the present invention.Those skilled in the art also will readily appreciate that, component described herein, method or interaction
Order or combination are only example, and component, method or the interaction of the various aspects of present disclosure can be with different from the present invention
Those described modes are combined or implement.
Functional block and module can include processor, electronic equipment, hardware device, electronic building brick, logic circuit, storage
Device, software code, firmware code etc., or its any combination.With foregoing consistent, general processor, digital signal can be used
Processor (DSP), application-specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic devices, solely
The various explanations with reference to described in present disclosure are realized or performed to vertical door or transistor logic, independent hardware component or its any combination
Property logical block, module and circuit for performing function of the present invention.General processor can be microprocessor, but replace
Dai Di, processor can be any conventional processors, controller, microcontroller or state machine.Processor can also be implemented as
The combination of computing device, for example, the combination of DSP and microprocessor, multi-microprocessor, with reference to the one or more micro- of DSP core
Processor or any other such configuration.
With reference to the step of present disclosure the method or algorithm can directly with hardware, by processor perform software module,
Or both combination mode embody.Software module may reside within RAM memory, flash memory, ROM memory, eprom memory,
Eeprom memory, register, hard disk, removable disk, the storage medium of any other forms of CD-ROM or known in the art
In.Storage medium is connected to processor so that processor can write letter from read information and to storage medium
Breath.In alternative solution, storage medium can be integrated into processor.Pocessor and storage media may reside within ASIC.
ASIC may reside within user terminal, base station, sensor or any other communication equipment.In alternative solution, processor and
Storage medium can be resident in the user terminal as stand-alone assembly.
In one or more exemplary designs, the function can be with hardware, software, firmware, or any combination thereof
Implement.If implemented with software mode, the function can be stored in computer-readable as one or more instructions or code
Transmit on medium or on a computer-readable medium.Computer-readable medium includes computer storage media and communication media, its
Any medium including helping computer program being transmitted to another place from a place.Computer-readable recording medium
It can be any usable medium that can be accessed by universal or special computer.As an example, not a limit, this computer can
Reading medium can set including RAM, ROM, EEPROM, CD-ROM or other disk storage, magnetic disk storage or other magnetic storages
It is standby or available for instruction data structure format carry or storage it is expected program code devices any other medium, it can
With by universal or special computer or the access of universal or special processor.In addition, connection be properly termed as computer can
Read medium.If for example, using coaxial cable, fiber optic cables, twisted-pair feeder or Digital Subscriber Line (DSL) from website, server or
Other remote source softwares, then coaxial cable, fiber optic cables, twisted-pair feeder or DSL are comprised in the definition of medium.The present invention
The disk and CD used includes CD (CD), laser disk, CD, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein
Disk usually magnetically reproduce data, and CD reproduce data using laser optics.Combination of the above also should by comprising
In the range of computer-readable medium.
Although embodiments of the present invention and their advantages have been described in detail, it is to be understood that, do not departing from by appended power
In the case that profit requires the embodiment spirit and scope of restriction, various changes, replacement and change can be carried out herein.This
Outside, the scope of the present invention is not limited to process, machine, manufacture, material composition, means, method and step described in specification
Rapid specific embodiment.Performed and corresponding embodiment described herein one ordinarily skilled in the art will readily appreciate that can utilize
Essentially identical function is obtained and the presently, there are of the essentially identical result of embodiment described herein or developed later above-mentioned
Disclosure, process, machine, manufacture, material composition, means, method or step.Therefore, appended claims be intended to by these processes,
Machine, manufacture, material composition, means, method or step are embraced within their scope.
Claims (10)
1. a kind of method based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, the battery especially lithium electricity
Pond, it is characterised in that the described method comprises the following steps：
A, the part charge and discharge electrical measurement data curve for including multiple discrete sampling point datas of the battery is obtained；
B, the starting of part charge and discharge electrical measurement data curve Global center reference data curve relatively set in advance is determined
Point；
C, using the part charge and discharge electrical measurement data curve and a plurality of stepping center reference data and curves set in advance, pass through
Linear reconstruction or least square are rebuild, and determine curve of approximation, and according to the curve of approximation and the part charge and discharge electrical measurement
The starting point of data and curves Global center reference data curve relatively set in advance, polishing remove the part charge and discharge electrical measurement
The charge and discharge electrical measurement data curve of the remainder outside data and curves is measured, so that it is bent to rebuild complete charge and discharge electrical measurement data
Line.
2. the method as claimed in claim 1 based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, its feature
It is, step A includes pre-processing the part charge and discharge electrical measurement data curve, and the pretreatment comprises the following steps：
A1, carry out the multiple discrete sampling point data fast Fourier (FFT) conversion, and time domain data is transformed to frequency domain；
A2, carry out frequency domain data windowing process progress smothing filtering；
A3, carry out zero padding interpolation to filtered frequency domain data, make its sample rate and the Global center reference data curve and
The data sampling rate of the stepping center reference data and curves is consistent；
A4, by the transform frequency domain data after the smothing filtering and the interpolation to time domain.
3. the method as claimed in claim 1 or 2 based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, it is special
Sign is, in step B, by found in sliding window set in advance the part charge and discharge electrical measurement data curve with it is described
The least absolute value of the difference of Global center reference data curve, to determine the part charge and discharge electrical measurement data curve with respect to institute
State the starting point of Global center reference data curve.
4. the method as claimed in claim 3 based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, its feature
It is, step B includes：
B1, using the set point on the Global center reference data curve as starting point, corresponding to sampling sequence number w, take setting to grow
Corresponding measurement data subtraction calculations difference on the one piece of data of degree, with the part charge and discharge electrical measurement data curve, will subtract each other
Difference afterwards adds up and calculates the absolute value of accumulated value, and wherein w is initialized as 1；
B2, by the absolute value of the accumulated value calculated in step B1 compared with the difference minimum value e_min for being initially set maximal number,
If less than e_min, then the absolute value using e_min as the accumulated value calculated in step B1；
B3, the renewal starting point, w plus 1 if w is more than the size of the sliding window, and terminates, otherwise return to step
B1。
5. as described in Claims 1-4 any one based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction
Method, it is characterised in that step C comprises the following steps：
C11. by the part charge and discharge electrical measurement data curve respectively with it is every in a plurality of stepping center reference data and curves
One is matched, and determines the stepping center reference data and curves with the part charge and discharge electrical measurement data curve difference value minimum；
C12. by the use of the stepping center reference data that step C11 is determined as curve of approximation, according to the starting point, by the approximation
The charge and discharge electrical measurement data curve of remainder described in polishing, rebuilds complete charge and discharge electrical measurement data curve after curvilinear translation.
6. as described in Claims 1-4 any one based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction
Method, it is characterised in that step C comprises the following steps：
C21. gone to approach the part charge and discharge electrical measurement data curve with a plurality of stepping center reference data and curves, determine to make
The optimal coefficient that the quadratic sum of approximate error minimizes；
C22. according to the optimal coefficient, curve of approximation is established using a plurality of stepping center reference data and curves, by described in
The charge and discharge electrical measurement data curve of remainder described in polishing, it is bent to rebuild complete charge and discharge electrical measurement data after curve of approximation translation
Line.
7. the method as claimed in claim 6 based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, its feature
It is, in step C21,
If a plurality of stepping center reference data and curves are L bar curves, if every stepping center reference data and curves have it is N number of from
Dissipate sample point data,
Part charge and discharge electrical measurement data comprising N number of discrete sampling point data is with vector
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The matrix of L × M of L bar steppings reference data composition is
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L bar stepping reference datas are respectively with pstdFor starting point, the matrix of the L × N for the data composition that length is N is
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8. as described in claim 1 to 7 any one based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction
Method, it is characterised in that the Global center reference data curve and a plurality of stepping center reference data and curves are according to electricity
The material and production technology in pond are preset.
9. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the computer program quilt
Realized when processor performs complete based on battery compartment discharge and recharge data reconstruction as described in any one in claim 1~8
The method of discharge and recharge data.
A kind of 10. system based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction, it is characterised in that including：
Processor；And
Memory, for storing the executable instruction of the processor；
Wherein, the processor is configured to perform such as any one in claim 1~9 via the executable instruction is performed
The method based on the complete discharge and recharge data of battery compartment discharge and recharge data reconstruction.
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| CN110797579A (en) * | 2019-11-07 | 2020-02-14 | 蒋子杰 | Formation method of flexible package lithium ion battery with ternary material as anode |
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