CN109063260A - A kind of the aging tendency judgment method and device of power battery - Google Patents
A kind of the aging tendency judgment method and device of power battery Download PDFInfo
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Abstract
The embodiment of the invention provides the aging tendency judgment methods and device of a kind of power battery, which comprises obtains the warning information of the power battery；The warning information includes feature tag；Specified feature tag is extracted from the alarm；Corresponding floor data is obtained according to the feature tag；Sample data is generated using the floor data；Obtain the number of principal components evidence in the sample data；By the number of principal components according to the aging action for being determined as the power battery.The embodiment of the present invention can extract the crucial aging action for influencing power battery aging in floor data corresponding to the alarm type from distinct program, improve the accuracy rate of power battery aging action extraction.
Description
Technical field
The present invention relates to battery technology fields, more particularly to a kind of aging tendency judgment method of power battery and one
The aging tendency judgment means of kind power battery.
Background technique
Power battery is the core component of electric car, its health status directly influences the performance and peace of running car
Quan Xing.Different with orthodox car, the aging of power battery has the tendency that more obvious.Retired requirement of the industry for power battery
Usually capacity attenuation is to the 80% of initial capacity, and the health of power battery and service life state can be presented acceleration and glide after this
Trend.
In the actual environment, the individual instances of each power battery are different, and applying working condition is also different, even therefore surface
Close the power battery of rule, it is also possible to which there are certain accelerated ageing situations.
In the whole life cycle that battery uses, up to more than 30 kinds of alarm type can situation hair in various degree
Raw, these operating condition factor/aging actions more or less affect the remaining life of battery pack, therefore, how accurately to determine shadow
The principal element for ringing cell degradation is most important.
Summary of the invention
In view of the above problems, the embodiment of the present invention proposes the aging tendency judgment method of a kind of power battery and corresponding
A kind of aging tendency judgment means of power battery.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of aging tendency judgment method of power battery, packets
It includes:
Obtain the warning information of the power battery；The warning information includes feature tag；
Specified feature tag is extracted from the alarm；
Corresponding floor data is obtained according to the feature tag；
Sample data is generated using the floor data；
Obtain the number of principal components evidence in the sample data；
By the number of principal components according to the aging action for being determined as the power battery.
Preferably, the specified feature tag includes capacity and internal resistance；The corresponding floor data of the capacity includes electricity
Pressure, electric current and temperature, the corresponding floor data of the internal resistance includes temperature.
Preferably, before described the step of generating sample data using the floor data, further includes:
Judge whether the floor data is effective；
If so, the floor data is retained；If it is not, then abandoning the floor data.
Preferably, described the step of generating sample data using the floor data, includes:
Centralization processing or normalized are carried out to the floor data, the floor data that obtains that treated；
Will treated the floor data as sample data.
Preferably, the number of principal components in the sample data is obtained according to using Principal Component Analysis.
Correspondingly, the embodiment of the invention discloses a kind of aging tendency judgment means of power battery, comprising:
Warning information obtains module, for obtaining the warning information of the power battery；The warning information includes feature
Label；
Feature tag extraction module, for extracting specified feature tag from the alarm；
Floor data obtains module, for obtaining corresponding floor data according to the feature tag；
Sample data generation module, for generating sample data using the floor data；
Principal component obtains module, for obtaining the number of principal components evidence in the sample data；
Determination module, for the number of principal components evidence to be determined as to the aging action of the power battery.
Preferably, the specified feature tag includes capacity and internal resistance；The corresponding floor data of the capacity includes electricity
Pressure, electric current and temperature, the corresponding floor data of the internal resistance includes temperature.
Preferably, further includes:
Effective judgement module, for judging whether the floor data is effective；
Filtering module, for retaining the floor data, or, abandoning the floor data.
Preferably, the sample data generation module includes:
Submodule is pre-processed, for carrying out centralization processing or normalized to the floor data, after obtaining processing
Floor data；
Determine submodule, for will treated the floor data as sample data.
Preferably, the number of principal components in the sample data is obtained according to using Principal Component Analysis.
The embodiment of the present invention includes following advantages:
In embodiments of the present invention, the warning information of the power battery is obtained first；The warning information includes feature
Label；Then, specified feature tag is extracted from the alarm, and obtains corresponding operating condition number according to the feature tag
According to, then using floor data generation sample data, finally, the number of principal components evidence in the sample data is obtained, it will be described
Number of principal components is according to the aging action for being determined as the power battery.The embodiment of the present invention can be from the alarm type institute of distinct program
The crucial aging action for influencing power battery aging is extracted in corresponding floor data, is improved power battery aging action and is mentioned
The accuracy rate taken.
Detailed description of the invention
Fig. 1 is a kind of step flow chart of the aging tendency judgment method embodiment of power battery of the invention；
Fig. 2 is a kind of structural block diagram of the aging tendency judgment means embodiment of power battery of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig.1, a kind of step process of the aging tendency judgment method embodiment of power battery of the invention is shown
Figure, can specifically include following steps:
Step 101, the warning information of the power battery is obtained；The warning information includes feature tag；
In embodiments of the present invention, warning information can be extracted from counting one by one in.Historical data may include power battery
Voltage during service, electric current, temperature, state-of-charge, health status, power rating, warning information, capacity, internal resistance, pressure
The data such as difference, self discharge.In practical applications, historical data can be acquired by battery management system, collected data
It can store in local database, the historical data as power battery；Collected data can also be uploaded into clothes
Business device, is stored in the database of server, the historical data as power battery.Acquire data, the process of storing data, side
Formula can be configured according to actual needs, the embodiment of the present invention to this with no restriction.
And historical data then obtains directly from database, the number in either local database or server
According to library.
It should be noted that so-called " historical data " be for aging tendency judgement timing node for because
These data are collected before the timing node of aging tendency judgement, so being referred to as " historical data ", data are adopted
Collection all acquires in real time in fact.
In addition, the embodiment of the present invention be other than it can assess retired power battery, it can also be to just
It is assessed in the power battery of military service.
In practical applications, warning information may include multiple types, the corresponding feature tag of each type, such as electricity
Pressure, electric current, capacity, internal resistance etc..Such as: alarm type related with voltage has that total voltage is excessively high, total voltage is too low, monomer is electric
It is too low to press through high and monomer voltage, in summarizing alarm type, these four types of alarm types can be asked to union, regard voltage alarm
Type.
Step 102, specified feature tag is extracted from the alarm；
In practical applications, the aging action of power battery mainly includes that capacity attenuation and internal resistance increase two problems, because
This, in the embodiment of the present invention, specified feature tag may include capacity and internal resistance.
Step 103, corresponding floor data is obtained according to the feature tag；
Specifically, factor related with capacity includes voltage, electric current and temperature, therefore, the corresponding floor data of capacity can
To include voltage value, current value and temperature value and the related principal element of internal resistance includes temperature, therefore, the corresponding data of internal resistance
It may include temperature value.
Certainly, floor data can also include other floor datas, such as BMS (BATTERY other than several above-mentioned
MANAGEMENT SYSTEM, battery management system) the upload information moment, sequence number, charging times, rated capacity, current charging
Cumulative capacity, charged state etc., certain features further relate to the data of monomer and battery pack, can be according to demand in practical application
Specific adjustment, the embodiment of the present invention to this with no restriction.
Due to also being used in preprocessed data the BMS upload information moment, sequence number, charging times, rated capacity, currently
Charge accumulation capacity, charged state etc., certain features further relate to the fields such as the data of monomer and battery pack, thus carry out it is main at
Only retain field related with capacity or internal resistance before analysis, for example capacity can save: voltage relevant field, electric current related words
Section, temperature relevant field use number of days, equivalent cycle number.
Before described the step of generating sample data using the floor data, further includes:
Judge whether the floor data is effective；
If so, the floor data is retained；If it is not, then abandoning the floor data
Specifically, removing repetition values and null value to floor data, exceptional value is removed further according to technical protocol standard, so that it may
To guarantee that data available is rationally effective, effective floor data is retained；If certain floor datas are invalid data, just
Invalid floor data is abandoned.
Step 104, sample data is generated using the floor data；
It is described using the floor data generate sample data the step of include:
Centralization processing or normalized are carried out to the floor data, the floor data that obtains that treated；
Will treated the floor data as sample data.
It, then will treated work specifically, carry out centralization processing or normalized to effective floor data
Condition data creating is at sample data, and in sample data, floor data can use x1,x2,...,xnTo indicate.
Step 105, the number of principal components evidence in the sample data is obtained；
In embodiments of the present invention, the number of principal components in the sample data is obtained according to using Principal Component Analysis.Specifically
, progress orthogonal transformation first:
Wherein, i indicates feature serial number, and j indicates the data amount check of each feature.
Then covariance matrix is asked to sample, principal component number m value is determined according to characteristic root:
Each characteristic root corresponds to a feature vector bj, the target variable after standardization is finally converted into principal component:
uj=zi T*bj；
Wherein, j=1,2 ..., m, m are main compositional data, ujThat is j-th of principal component.M principal component is weighted and is asked
With to get final evaluation of estimate, flexible strategy are the variance contribution ratio of each principal component.
Step 106, by the number of principal components according to the aging action for being determined as the power battery.
For example, V, I, T, Time_date, chrstate, packstate, such as this 6 features, pass through principal component analysis
Method, V and I become U1, variance contribution ratio 0.5；T and Time_date becomes U2, variance contribution ratio 0.4；chrstate
Become U3, variance contribution ratio 0.1 with packstate.And U1+U2=0.9 > 0.85, so that it may abandon U3, just by U1, U2
It is finally determining number of principal components evidence, i.e. aging action.
It should be noted that the variance contribution ratio of each principal component and be 1, for example, if there are three variance contribution ratio
U1, U2, U3, then U1+U2+U3=1；If there are four variance contribution ratio U1, U2, U3, U4, U1+U2+U3+U4=1.
In embodiments of the present invention, the warning information of the power battery is obtained first；The warning information includes feature
Label；Then, specified feature tag is extracted from the alarm, and obtains corresponding operating condition number according to the feature tag
According to, then using floor data generation sample data, finally, the number of principal components evidence in the sample data is obtained, it will be described
Number of principal components is according to the aging action for being determined as the power battery.The embodiment of the present invention can be from the alarm type institute of distinct program
The crucial aging action for influencing power battery aging is extracted in corresponding floor data, is improved power battery aging action and is mentioned
The accuracy rate taken.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
Necessary to example.
Referring to Fig. 2, a kind of structural block diagram of the aging tendency judgment means embodiment of power battery of the invention is shown,
It can specifically include following module:
Warning information obtains module 201, for obtaining the warning information of the power battery；The warning information includes spy
Levy label；
Feature tag extraction module 202, for extracting specified feature tag from the alarm；
Floor data obtains module 203, for obtaining corresponding floor data according to the feature tag；
Sample data generation module 204, for generating sample data using the floor data；
Principal component obtains module 205, for obtaining the number of principal components evidence in the sample data；
Determination module 206, for the number of principal components evidence to be determined as to the aging action of the power battery.
In a kind of preferred embodiment of the present invention, the specified feature tag includes capacity and internal resistance；The capacity pair
The floor data answered includes voltage, electric current and temperature, and the corresponding floor data of the internal resistance includes temperature.
In a kind of preferred embodiment of the present invention, further includes:
Effective judgement module, for judging whether the floor data is effective；
Filtering module, for retaining the floor data, or, abandoning the floor data.
In a kind of preferred embodiment of the present invention, the sample data generation module includes:
Submodule is pre-processed, for carrying out centralization processing or normalized to the floor data, after obtaining processing
Floor data；
Determine submodule, for will treated the floor data as sample data.
In a kind of preferred embodiment of the present invention, the number of principal components in the sample data is obtained according to using Principal Component Analysis
It takes.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
The aging tendency judgment method to a kind of power battery provided by the present invention and a kind of power battery is old above
Change Trend judgement device, be described in detail, specific case used herein to the principle of the present invention and embodiment into
Elaboration is gone, the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile for this
The those skilled in the art in field, according to the thought of the present invention, there will be changes in the specific implementation manner and application range,
In conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of aging tendency judgment method of power battery characterized by comprising
Obtain the warning information of the power battery；The warning information includes feature tag；
Specified feature tag is extracted from the alarm；
Corresponding floor data is obtained according to the feature tag；
Sample data is generated using the floor data；
Obtain the number of principal components evidence in the sample data；
By the number of principal components according to the aging action for being determined as the power battery.
2. the method according to claim 1, wherein the specified feature tag includes capacity and internal resistance；Institute
Stating the corresponding floor data of capacity includes voltage, electric current and temperature, and the corresponding floor data of the internal resistance includes temperature.
3. the method according to claim 1, wherein generating sample data using the floor data described
Before step, further includes:
Judge whether the floor data is effective；
If so, the floor data is retained；If it is not, then abandoning the floor data.
4. method according to claim 1 or 2 or 3, which is characterized in that described to generate sample number using the floor data
According to the step of include:
Centralization processing or normalized are carried out to the floor data, the floor data that obtains that treated；
Will treated the floor data as sample data.
5. the method according to claim 1, wherein the number of principal components in the sample data is according to using principal component
Analytic approach obtains.
6. a kind of aging tendency judgment means of power battery characterized by comprising
Warning information obtains module, for obtaining the warning information of the power battery；The warning information includes feature tag；
Feature tag extraction module, for extracting specified feature tag from the alarm；
Floor data obtains module, for obtaining corresponding floor data according to the feature tag；
Sample data generation module, for generating sample data using the floor data；
Principal component obtains module, for obtaining the number of principal components evidence in the sample data；
Determination module, for the number of principal components evidence to be determined as to the aging action of the power battery.
7. device according to claim 6, which is characterized in that the specified feature tag includes capacity and internal resistance；Institute
Stating the corresponding floor data of capacity includes voltage, electric current and temperature, and the corresponding floor data of the internal resistance includes temperature.
8. device according to claim 6, which is characterized in that further include:
Effective judgement module, for judging whether the floor data is effective；
Filtering module, for retaining the floor data, or, abandoning the floor data.
9. device described according to claim 6 or 7 or 8, which is characterized in that the sample data generation module includes:
Submodule is pre-processed, for carrying out centralization processing or normalized to the floor data, the work that obtains that treated
Condition data；
Determine submodule, for will treated the floor data as sample data.
10. device according to claim 6, which is characterized in that number of principal components in the sample data according to using it is main at
Analytic approach is divided to obtain.
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