CN104965180B - The detection method and device in electrokinetic cell life-span - Google Patents
The detection method and device in electrokinetic cell life-span Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
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- 239000012634 fragment Substances 0.000 claims description 45
- 238000012544 monitoring process Methods 0.000 claims description 14
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- 238000000513 principal component analysis Methods 0.000 claims description 9
- 238000013481 data capture Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
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Abstract
The embodiment of the invention discloses a kind of detection method and device in electrokinetic cell life-span, it is related to power battery technology field.Method includes：Enter Mobile state according to driving cycle data to be averaging, acquire the simplification floor data of the driving cycle data；Curent change data according to simplifying in operating mode determine electrokinetic cell electric discharge strategy；Constant-current charge repeatedly is carried out to the electrokinetic cell on electric automobile, discharged according to electrokinetic cell electric discharge strategy；During cycle charge-discharge, if the percentage that the current capacities of electrokinetic cell decay to the initial nominal capacity for accounting for electrokinetic cell is less than a preset percentage, it is determined that carrying out the cycle-index of discharge and recharge to the electrokinetic cell, and the cycle life of electrokinetic cell is used as using the cycle-index.The problem of present invention can solve the problem that currently detects the testing result inaccuracy in electrokinetic cell life-span by not considering the constant current charge-discharge experiment method of Real-road Driving Cycle, and the validity of experiment is poor.
Description
Technical field
The present invention relates to power battery technology field, more particularly to a kind of detection method and device in electrokinetic cell life-span.
Background technology
Under the active demand of economic globalization development and social energy conservation emission reduction, the center of gravity of World Auto Industry development is
Shift.Currently, development has the characteristics that environmental protection, the new-energy automobile of energy-conservation have become the common recognition of automotive field, and
Electric automobile is exactly the common technique in this developing direction.Electric automobile is the one kind for providing energy by electrokinetic cell to run
Vehicle, and electrokinetic cell is as the important component in electric automobile, the fine or not hair that will directly influence electric automobile of its performance
Exhibition and application prospect.At present, the life-span of electrokinetic cell is the important performance indexes of electrokinetic cell, and universal in electrokinetic cell field
Thinking can not be with electric automobile after battery capacity drops to the 80% of rated capacity.
In order to study the life-span of electrokinetic cell, currently typically completed by some charge and discharge electric tests, specific scheme one
As be that constant current charge-discharge several times is carried out to electrokinetic cell, analyze electrokinetic cell along with the decay of electrokinetic cell capacity
Life-span.However, electrokinetic cell, when being run on being installed on electric automobile, its actual discharge process is not constantly in constant current
Pressure constant state, it is therefore, currently inaccurate come the testing result for detecting the electrokinetic cell life-span by constant current charge-discharge experiment, experiment
Validity is poor.
The content of the invention
Embodiments of the invention provide a kind of detection method and device in electrokinetic cell life-span, to solve currently by not examining
The constant current charge-discharge experiment method of worry Real-road Driving Cycle is inaccurate come the testing result for detecting the electrokinetic cell life-span, and experiment has
The problem of effect property is poor.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of detection method in electrokinetic cell life-span, including：
Obtain driving cycle data of the electric automobile in each traveling fragment；
Enter Mobile state according to the driving cycle data to be averaging, acquire the simplification operating mode number of the driving cycle data
According to；The simplified floor data includes the curent change data of each time in each traveling fragment；
Electrokinetic cell electric discharge strategy is determined according to the curent change data；
Constant-current charge repeatedly is carried out to the electrokinetic cell on the electric automobile, the basis after electrokinetic cell is fully charged
The electrokinetic cell electric discharge strategy is discharged；
During cycle charge-discharge, if the current capacities of the electrokinetic cell decay to the initial nominal for accounting for electrokinetic cell
When the percentage of capacity is less than a preset percentage, it is determined that carrying out the cycle-index of discharge and recharge to the electrokinetic cell, and followed with this
Cycle life of the ring number as the electrokinetic cell.
Specifically, the driving cycle data for obtaining electric automobile in each traveling fragment, including：
In electric automobile during traveling, electric automobile is obtained by the data monitoring system being installed on electric automobile and runs number
According to；
Electric automobile service data is divided into multiple traveling fragments；The traveling fragment includes idling section, accelerating sections, even
Fast section and braking section；
It is determined that the characteristic quantity related to each traveling fragment；
Principal component analysis is carried out according to the characteristic quantity, determines the principal character amount of each traveling fragment；The principal character
Amount includes average current, current limit, current standard deviation and current changing rate.
Specifically, described discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy, including：
According to the curent change data electrokinetic cell is controlled discharge into one after electrokinetic cell is fully charged default surplus
Remaining electricity percentage.
Specifically, the default residual power percentage is 30%.
Specifically, described repeatedly carry out constant-current charge to the electrokinetic cell on the electric automobile, in electrokinetic cell
Discharged after fully charged according to electrokinetic cell electric discharge strategy, including：
Carry out a charge and discharge process；The charge and discharge process is to carry out constant current to the electrokinetic cell on the electric automobile to fill
Electricity, and discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy；
Circulation carries out the repeatedly charge and discharge process, and with 1/ after charge and discharge process described in one pre-determined number of every progress
3C multiplying powers condition carries out normal capacity test, to monitor the current capacities of electrokinetic cell；
If monitoring, the current capacities of electrokinetic cell decay to the percentage of the initial nominal capacity for accounting for electrokinetic cell and are less than
During one preset percentage, the charge and discharge process is terminated.
A kind of detection means in electrokinetic cell life-span, including：
Driving cycle data capture unit, for obtaining driving cycle data of the electric automobile in each traveling fragment；
Simplify floor data determining unit, be averaging, acquire for entering Mobile state according to the driving cycle data
The simplification floor data of the driving cycle data；The simplified floor data includes the curent change of each time in each traveling fragment
Data；
Electrokinetic cell electric discharge policy determining unit, for determining electrokinetic cell electric discharge plan according to the curent change data
Slightly；
Charge-discharge control unit, for repeatedly carrying out constant-current charge to the electrokinetic cell on the electric automobile,
Discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy；
Electrokinetic cell life-span determining unit, for during cycle charge-discharge, if the current capacities of the electrokinetic cell
When decaying to the percentage of the initial nominal capacity for accounting for electrokinetic cell and being less than a preset percentage, it is determined that being carried out to the electrokinetic cell
The cycle-index of discharge and recharge, and the cycle life using the cycle-index as the electrokinetic cell.
Specifically, the driving cycle data capture unit, including：
Service data monitoring module, in electric automobile during traveling, passing through the data monitoring being installed on electric automobile
System obtains electric automobile service data；
Fragment division module is travelled, for electric automobile service data to be divided into multiple traveling fragments；The traveling piece
Section includes idling section, at the uniform velocity accelerating sections, section and braking section；
Characteristic quantity determining module, for determining the characteristic quantity related to each traveling fragment；
Principal component analysis module, for carrying out principal component analysis according to the characteristic quantity, determine the main of each traveling fragment
Characteristic quantity；The principal character amount includes average current, current limit, current standard deviation and current changing rate.
In addition, the charge-discharge control unit, is specifically used for：
According to the curent change data electrokinetic cell is controlled discharge into one after electrokinetic cell is fully charged default surplus
Remaining electricity percentage.
Specifically, the default residual power percentage in the charge-discharge control unit is 30%.
Specifically, the charge-discharge control unit, including：
Charge and discharge control module, for carrying out a charge and discharge process；The charge and discharge process is on the electric automobile
Electrokinetic cell carries out constant-current charge, and is discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy；
Normal capacity test module, the repeatedly charge and discharge process is carried out for circulating, and in one pre-determined number of every progress
Normal capacity test is carried out with 1/3C multiplying powers condition after the charge and discharge process, to monitor the current capacities of electrokinetic cell；
Charge and discharge process terminates module, and the first of electrokinetic cell is accounted for for being decayed in the current capacities for monitoring electrokinetic cell
When the percentage of beginning rated capacity is less than a preset percentage, the charge and discharge process is terminated.
The detection method and device in electrokinetic cell life-span provided in an embodiment of the present invention, during by obtaining electric automobile during traveling
In the driving cycle data of each traveling fragment, and simplified floor data is converted into, and then by simplifying the electric current in floor data
Delta data determines electrokinetic cell electric discharge strategy；Afterwards, repeatedly constant current is carried out to the electrokinetic cell on electric automobile to fill
Electricity, discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy；During cycle charge-discharge, if power
When the percentage that the current capacities of battery decay to the initial nominal capacity for accounting for electrokinetic cell is less than a preset percentage, it is determined that pair
The electrokinetic cell carries out the cycle-index of discharge and recharge, and the cycle life of electrokinetic cell is used as using the cycle-index.It can be seen that this hair
The bright detection to the electrokinetic cell life-span simulates the discharge process of actual driving cycle, and not constant-current discharge, avoids perseverance
The problem of stream charge-discharge test mode is inaccurate come the testing result for detecting the electrokinetic cell life-span, and the validity of experiment is poor.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of flow chart one of the detection method in electrokinetic cell life-span provided in an embodiment of the present invention；
Fig. 2 is a kind of flowchart 2 of the detection method in electrokinetic cell life-span provided in an embodiment of the present invention；
Fig. 3 is the contrast schematic diagram of the driving cycle and simplified operating mode in the embodiment of the present invention；
Fig. 4 is the schematic diagram of the laboratory lifetimes test system in the embodiment of the present invention；
Fig. 5 is a kind of structural representation one of the detection means in electrokinetic cell life-span provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation two of the detection means in electrokinetic cell life-span provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, the embodiment of the present invention provides a kind of detection method in electrokinetic cell life-span, including：
Step 101, obtain driving cycle data of the electric automobile in each traveling fragment.
Step 102, enter Mobile state averaging according to the driving cycle data, acquire the letter of the driving cycle data
Change floor data.
Wherein, the simplified floor data includes the curent change data of each time in each traveling fragment.
Step 103, electrokinetic cell electric discharge strategy is determined according to the curent change data.
Step 104, constant-current charge repeatedly is carried out to the electrokinetic cell on electric automobile, after electrokinetic cell is fully charged
Discharged according to electrokinetic cell electric discharge strategy.
Step 105, during cycle charge-discharge, if the current capacities of electrokinetic cell, which decay to, accounts for the initial of electrokinetic cell
When the percentage of rated capacity is less than a preset percentage, it is determined that the cycle-index of discharge and recharge is carried out to the electrokinetic cell, and with
Cycle life of the cycle-index as the electrokinetic cell.
The detection method in electrokinetic cell life-span provided in an embodiment of the present invention, in each row during by obtaining electric automobile during traveling
The driving cycle data of fragment are sailed, and are converted into simplified floor data, and then by simplifying the curent change number in floor data
According to determination one electrokinetic cell electric discharge strategy；Afterwards, constant-current charge repeatedly is carried out to the electrokinetic cell on electric automobile, dynamic
Discharged after power battery is fully charged according to electrokinetic cell electric discharge strategy；During cycle charge-discharge, if electrokinetic cell
When the percentage that current capacities decay to the initial nominal capacity for accounting for electrokinetic cell is less than a preset percentage, it is determined that to the power
Battery carries out the cycle-index of discharge and recharge, and the cycle life of electrokinetic cell is used as using the cycle-index.It can be seen that the present invention is to dynamic
The detection of power battery life simulates the discharge process of actual driving cycle, and not constant-current discharge, avoids constant current charge and discharge
The problem of electric experiment method is inaccurate come the testing result for detecting the electrokinetic cell life-span, and the validity of experiment is poor.
In order that those skilled in the art is better understood by the present invention, a more detailed embodiment is set forth below,
As shown in Fig. 2 the embodiment of the present invention provides a kind of detection method in electrokinetic cell life-span, including：
Step 201, in electric automobile during traveling, pass through the data monitoring system that is installed on electric automobile and obtain electronic vapour
Car service data.
In one embodiment, the data monitoring system obtained the time interval of electric automobile service data less than 1 second.The electricity
Electrical automobile service data can include car speed, electrokinetic cell total voltage, total current, environment temperature, always be filled with releasing energy
Deng.
Step 202, electric automobile service data is divided into multiple traveling fragments.
Wherein, the traveling fragment includes idling section, at the uniform velocity accelerating sections, section and braking section.
Step 203, determine the characteristic quantity related to each traveling fragment.
Step 204, according to the characteristic quantity carry out principal component analysis, determine it is each traveling fragment principal character amount.
Wherein, the principal character amount includes average current, current limit, current standard deviation and current changing rate.
Step 205, enter Mobile state averaging according to the driving cycle data, acquire the letter of the driving cycle data
Change floor data.
Wherein, the simplified floor data includes the curent change data of each time in each traveling fragment.
Such as contrast of the driving cycle (Fig. 3 a parts) shown in Fig. 3 with simplifying operating mode (Fig. 3 b parts), simplify work
Condition is to be averaging to obtain by driving cycle dynamic, while is considered during simplification and add up to put after 1 working condition measurement
Go out the error of capability value.Wherein, abscissa is the time, and ordinate is size of current.In addition, in Fig. 3 a parts, Current
Part is electric current, and Velocity parts are voltage.
Step 206, electrokinetic cell electric discharge strategy is determined according to the curent change data.
Specifically, the electrokinetic cell electric discharge strategy curent change data can control electrokinetic cell to be put according to
Electricity.
Step 207, constant-current charge repeatedly is carried out to the electrokinetic cell on electric automobile, after electrokinetic cell is fully charged
Electrokinetic cell is controlled to carry out discharging into a default residual power percentage according to the curent change data.
Wherein, the default residual power percentage can be 30%.Generally, electrokinetic cell dump energy (SOC)
Using section be 30% --- 100%, therefore, herein set dump energy percentage be 30%.
Specifically, the specific implementation of the step 207 can be for example：
Circulation carries out multiple charge and discharge process.The charge and discharge process is to carry out perseverance to the electrokinetic cell on the electric automobile
Current charge, discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy.This is carried out repeatedly in circulation to fill
Discharge process, and normal capacity survey is carried out with 1/3C multiplying powers condition after charge and discharge process described in one pre-determined number of every progress
Examination, monitor the current capacities of electrokinetic cell.If monitoring, the current capacities of electrokinetic cell decay to the initial volume for accounting for electrokinetic cell
When the percentage of constant volume is less than a preset percentage, the charge and discharge process is terminated.
Step 208, electrokinetic cell current capacities decay to the initial nominal capacity for accounting for electrokinetic cell percentage it is small
When a preset percentage, it is determined that the cycle-index of discharge and recharge is carried out to the electrokinetic cell, and using the cycle-index described in
The cycle life of electrokinetic cell.
What deserves to be explained is when performing step 207 to step 208, can by a laboratory lifetimes test system come
Realize, wherein, the laboratory lifetimes test system is as shown in figure 4, including whole group battery test apparatus 401, the whole group battery is surveyed
Examination equipment 401 is communicated to connect by communication interface 402 and a computer 403；The whole group battery test apparatus 401 also passes through power
Interface 404 is connected with each battery 406 in insulating box 405；In addition, the laboratory lifetimes test system also includes being used to gather
The data collecting card 407 of data, electric current and voltage when battery 406 works can be gathered, and the data transfer collected is arrived
Computer 403.Specifically, the whole group battery test apparatus 401 is used for controlling the charge and discharge cycles of battery 406.The computer 403
Realize that electrokinetic cell simplification operating mode reappears in being travelled to vehicle in discharge process for controlling battery, and battery is filled
Electric process uses the constant current charging method of standard.The environment temperature that the insulating box 405 can be used in the simulated battery course of work.
The detection method in electrokinetic cell life-span provided in an embodiment of the present invention, in each row during by obtaining electric automobile during traveling
The driving cycle data of fragment are sailed, and are converted into simplified floor data, and then by simplifying the curent change number in floor data
According to determination one electrokinetic cell electric discharge strategy；Afterwards, constant-current charge repeatedly is carried out to the electrokinetic cell on electric automobile, dynamic
Discharged after power battery is fully charged according to electrokinetic cell electric discharge strategy；During cycle charge-discharge, if electrokinetic cell
When the percentage that current capacities decay to the initial nominal capacity for accounting for electrokinetic cell is less than a preset percentage, it is determined that to the power
Battery carries out the cycle-index of discharge and recharge, and the cycle life of electrokinetic cell is used as using the cycle-index.It can be seen that the present invention is to dynamic
The detection of power battery life simulates the discharge process of actual driving cycle, and not constant-current discharge, avoids constant current charge and discharge
The problem of electric experiment method is inaccurate come the testing result for detecting the electrokinetic cell life-span, and the validity of experiment is poor.
Corresponding to the detection method in the electrokinetic cell life-span shown in above-mentioned Fig. 1 to Fig. 2, as shown in figure 5, the embodiment of the present invention
A kind of detection means in electrokinetic cell life-span is provided, including：
Driving cycle data capture unit 31, driving cycle data of the electric automobile in each traveling fragment can be obtained.
Simplify floor data determining unit 32, Mobile state averaging can be entered according to driving cycle data, acquires this
The simplification floor data of driving cycle data.Wherein, the simplification floor data includes the electric current change of each time in each traveling fragment
Change data.
Electrokinetic cell electric discharge policy determining unit 33, electrokinetic cell electric discharge plan can be determined according to curent change data
Slightly.
Charge-discharge control unit 34, constant-current charge repeatedly can be carried out to the electrokinetic cell on electric automobile, dynamic
Discharged after power battery is fully charged according to electrokinetic cell electric discharge strategy.
Electrokinetic cell life-span determining unit 35, can be during cycle charge-discharge, if the current capacities of electrokinetic cell decline
When reducing to the percentage of the initial nominal capacity for accounting for electrokinetic cell and being less than a preset percentage, it is determined that being filled to the electrokinetic cell
The cycle-index of electric discharge, and the cycle life of electrokinetic cell is used as using the cycle-index.
Further, such as Fig. 6, the driving cycle data capture unit 31, can include：
Service data monitoring module 311, it can be supervised in electric automobile during traveling by the data being installed on electric automobile
Control system obtains electric automobile service data.
Fragment division module 312 is travelled, electric automobile service data can be divided into multiple traveling fragments；Travel fragment
Including idling section, at the uniform velocity accelerating sections, section and braking section.
Characteristic quantity determining module 313, it may be determined that the characteristic quantity related to each traveling fragment.
Principal component analysis module 314, principal component analysis can be carried out according to characteristic quantity, determine the main spy of each traveling fragment
Sign amount.Wherein, the principal character amount includes average current, current limit, current standard deviation and current changing rate.
In addition, charge-discharge control unit 34, can specifically be controlled after electrokinetic cell is fully charged according to curent change data
Electrokinetic cell carries out discharging into a default residual power percentage.Default residual power percentage in the charge-discharge control unit
For 30%.
In addition, as shown in fig. 6, the charge-discharge control unit 34 can include：
Charge and discharge control module 341, a charge and discharge process can be carried out；The charge and discharge process is to dynamic on electric automobile
Power battery carries out constant-current charge, and is discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy.
Normal capacity test module 342, it can circulate and carry out multiple charge and discharge process, and be filled in one pre-determined number of every progress
Normal capacity test is carried out with 1/3C multiplying powers condition after discharge process, to monitor the current capacities of electrokinetic cell.
Charge and discharge process terminates module 343, can be decayed in the current capacities for monitoring electrokinetic cell and account for electrokinetic cell
The percentage of initial nominal capacity when being less than a preset percentage, terminate charge and discharge process.
The detection means in electrokinetic cell life-span provided in an embodiment of the present invention, in each row during by obtaining electric automobile during traveling
The driving cycle data of fragment are sailed, and are converted into simplified floor data, and then by simplifying the curent change number in floor data
According to determination one electrokinetic cell electric discharge strategy；Afterwards, constant-current charge repeatedly is carried out to the electrokinetic cell on electric automobile, dynamic
Discharged after power battery is fully charged according to electrokinetic cell electric discharge strategy；During cycle charge-discharge, if electrokinetic cell
When the percentage that current capacities decay to the initial nominal capacity for accounting for electrokinetic cell is less than a preset percentage, it is determined that to the power
Battery carries out the cycle-index of discharge and recharge, and the cycle life of electrokinetic cell is used as using the cycle-index.It can be seen that the present invention is to dynamic
The detection of power battery life simulates the discharge process of actual driving cycle, and not constant-current discharge, avoids constant current charge and discharge
The problem of electric experiment method is inaccurate come the testing result for detecting the electrokinetic cell life-span, and the validity of experiment is poor.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Apply specific embodiment in the present invention to be set forth the principle and embodiment of the present invention, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, there will be changes in specific embodiments and applications, in summary, in this specification
Appearance should not be construed as limiting the invention.
Claims (8)
- A kind of 1. detection method in electrokinetic cell life-span, it is characterised in that including：Obtain driving cycle data of the electric automobile in each traveling fragment；Enter Mobile state according to the driving cycle data to be averaging, acquire the simplification floor data of the driving cycle data； The simplified floor data includes the curent change data of each time in each traveling fragment；Electrokinetic cell electric discharge strategy is determined according to the curent change data；Constant-current charge repeatedly is carried out to the electrokinetic cell on the electric automobile, after electrokinetic cell is fully charged according to Electrokinetic cell electric discharge strategy is discharged；During cycle charge-discharge, if the current capacities of the electrokinetic cell decay to the initial nominal capacity for accounting for electrokinetic cell Percentage when being less than a preset percentage, it is determined that carry out the cycle-index of discharge and recharge to the electrokinetic cell, and with the circulation time Cycle life of the number as the electrokinetic cell；The driving cycle data that electric automobile is obtained in each traveling fragment, including：In electric automobile during traveling, electric automobile service data is obtained by the data monitoring system being installed on electric automobile；Electric automobile service data is divided into multiple traveling fragments；The traveling fragment includes idling section, at the uniform velocity accelerating sections, section And braking section；It is determined that the characteristic quantity related to each traveling fragment；Principal component analysis is carried out according to the characteristic quantity, determines the principal character amount of each traveling fragment；The principal character amount bag Include average current, current limit, current standard deviation and current changing rate.
- 2. the detection method in electrokinetic cell life-span according to claim 1, it is characterised in that described to be full of in electrokinetic cell Discharged after electricity according to electrokinetic cell electric discharge strategy, including：Electrokinetic cell is controlled to carry out discharging into a default remaining electricity according to the curent change data after electrokinetic cell is fully charged Measure percentage.
- 3. the detection method in electrokinetic cell life-span according to claim 2, it is characterised in that the default dump energy hundred Divide than being 30%.
- 4. the detection method in electrokinetic cell life-span according to claim 2, it is characterised in that described repeatedly to described Electrokinetic cell on electric automobile carries out constant-current charge, is entered after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy Row electric discharge, including：Carry out a charge and discharge process；The charge and discharge process is that constant-current charge is carried out to the electrokinetic cell on the electric automobile, and Discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy；Circulation carries out the repeatedly charge and discharge process, and with 1/3C times after charge and discharge process described in one pre-determined number of every progress Rate condition carries out normal capacity test, to monitor the current capacities of electrokinetic cell；If monitor the current capacities of electrokinetic cell decay to the initial nominal capacity for accounting for electrokinetic cell percentage be less than it is one pre- If during percentage, terminate the charge and discharge process.
- A kind of 5. detection means in electrokinetic cell life-span, it is characterised in that including：Driving cycle data capture unit, for obtaining driving cycle data of the electric automobile in each traveling fragment；Simplify floor data determining unit, be averaging for entering Mobile state according to the driving cycle data, acquire the row Sail the simplification floor data of floor data；The simplified floor data includes the curent change number of each time in each traveling fragment According to；Electrokinetic cell electric discharge policy determining unit, for determining electrokinetic cell electric discharge strategy according to the curent change data；Charge-discharge control unit, for repeatedly carrying out constant-current charge to the electrokinetic cell on the electric automobile, in power Discharged after battery is fully charged according to electrokinetic cell electric discharge strategy；Electrokinetic cell life-span determining unit, for during cycle charge-discharge, if the current capacities decay of the electrokinetic cell When being less than a preset percentage to the percentage of the initial nominal capacity for accounting for electrokinetic cell, it is determined that carrying out charge and discharge to the electrokinetic cell The cycle-index of electricity, and the cycle life using the cycle-index as the electrokinetic cell；The driving cycle data capture unit, including：Service data monitoring module, in electric automobile during traveling, passing through the data monitoring system being installed on electric automobile Obtain electric automobile service data；Fragment division module is travelled, for electric automobile service data to be divided into multiple traveling fragments；The traveling fragment bag Include idling section, at the uniform velocity accelerating sections, section and braking section；Characteristic quantity determining module, for determining the characteristic quantity related to each traveling fragment；Principal component analysis module, for carrying out principal component analysis according to the characteristic quantity, determine the principal character of each traveling fragment Amount；The principal character amount includes average current, current limit, current standard deviation and current changing rate.
- 6. the detection means in electrokinetic cell life-span according to claim 5, it is characterised in that the charge and discharge control list Member, it is specifically used for：Electrokinetic cell is controlled to carry out discharging into a default remaining electricity according to the curent change data after electrokinetic cell is fully charged Measure percentage.
- 7. the detection means in electrokinetic cell life-span according to claim 6, it is characterised in that the charge-discharge control unit In default residual power percentage be 30%.
- 8. the detection means in electrokinetic cell life-span according to claim 6, it is characterised in that the charge and discharge control list Member, including：Charge and discharge control module, for carrying out a charge and discharge process；The charge and discharge process is to the power on the electric automobile Battery carries out constant-current charge, and is discharged after electrokinetic cell is fully charged according to electrokinetic cell electric discharge strategy；Normal capacity test module, the repeatedly charge and discharge process is carried out for circulating, and described in one pre-determined number of every progress Normal capacity test is carried out with 1/3C multiplying powers condition after charge and discharge process, to monitor the current capacities of electrokinetic cell；Charge and discharge process terminates module, and the initial volume of electrokinetic cell is accounted for for being decayed in the current capacities for monitoring electrokinetic cell When the percentage of constant volume is less than a preset percentage, the charge and discharge process is terminated.
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| CN115097308B (en) * | 2022-05-11 | 2024-06-11 | 阿尔特汽车技术股份有限公司 | Method and device for analyzing SOH state of battery cell, electronic equipment and storage medium |
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