CN108521155A - A kind of electric vehicle charging method for early warning and system - Google Patents
A kind of electric vehicle charging method for early warning and system Download PDFInfo
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- CN108521155A CN108521155A CN201810435354.7A CN201810435354A CN108521155A CN 108521155 A CN108521155 A CN 108521155A CN 201810435354 A CN201810435354 A CN 201810435354A CN 108521155 A CN108521155 A CN 108521155A
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Abstract
The present invention discloses a kind of electric vehicle charging method for early warning and system, this method include：Obtain the battery information of each single battery in electric vehicle；The charging real-time voltage of each single battery is measured in real time；Judge the battery types of electric vehicle and the degree of aging of battery；According to battery types and degree of aging, warning information is obtained；Determine the first early warning voltage value and the second early warning voltage value；Whether judge to charge real-time voltage more than the second early warning voltage value, big multiplying power charge mode is carried out if being not more than；If more than then judging to charge, whether real-time voltage is less than the first early warning voltage value；Alarm is sent out if being less than and big multiplying power charge mode is transformed to small multiplying power charge mode；Otherwise stop charging.The operating pressure that BMS is alleviated using this method or system is avoided that charging accident occurs because of BMS failures, reduces auto cost and improve safety.
Description
Technical field
The present invention relates to electric vehicle fields, more particularly to a kind of electric vehicle charging method for early warning and system.
Background technology
All it is by battery management system (Battery Management in the charging security monitoring of existing electric vehicle
System, BMS) it completes, since single battery is large number of in battery system, BMS is completed to each single battery information collection
Afterwards, also want for further analysis until judge, this is applied with prodigious operating pressure to BMS itself, cause BMS at
This height, efficiency are low.The ability of BMS is limited after all, if BMS breaks down, be easy to cause the safety problems such as over-charging of battery.In BMS
Charging warning information be typically battery charge cutoff voltage, since the warning information of battery in BMS is when automobile dispatches from the factory
What time integrated, such as the aging of battery, this warning information is no longer valid, be easy to cause safety accident when charging.
In the charging process of current electric vehicle, BMS sends charging by detecting the information of each single battery to charging pile
Request signal.Charging pile is responsible for responding the charge request of BMS, and corresponding charge power is conveyed to electric vehicle.Entirely charged
Journey is all controlled by BMS, and charging process will take into account battery charging safe early warning, prevent battery overcharge and cause accident.It prevents
The warning information of charging safety is usually the charge cutoff voltage of battery, and this warning information is just integrated in when automobile dispatches from the factory
In BMS, do not make adjustment with the aging of battery.
Invention content
The object of the present invention is to provide a kind of electric vehicle charging method for early warning and systems, solve battery management system not
The problem of early warning being carried out to batteries of electric automobile in real time.
To achieve the above object, the present invention provides following schemes：
A kind of electric vehicle charging method for early warning, including：
Obtain the battery information of each single battery in electric vehicle；The battery information includes that automobile model, history are filled
Electric data；
The charging real-time voltage of each single battery is measured in real time；
The battery types of the electric vehicle are judged according to the automobile model；
The degree of aging of the single battery of the electric vehicle is judged according to the history charge data；
According to the battery types and the degree of aging, the warning information of the single battery is obtained；
The first early warning voltage value and the second early warning voltage value are determined according to the warning information；The second early warning voltage value
Less than the first early warning voltage value；
Judge whether the charging real-time voltage is more than the second early warning voltage value, obtains the first judgement result；
If the first judgement result indicates that the charging real-time voltage is not more than the second early warning voltage value, carry out
Big multiplying power charge mode；The big multiplying power charge mode is to set power using second to charge as standard；
If the first judgement result indicates that the charging real-time voltage is more than the second early warning voltage value, institute is judged
It states whether charging real-time voltage is less than the first early warning voltage value, obtains the second judgement result；
Police is sent out if the second judgement result indicates that the charging real-time voltage is less than the first early warning voltage value
It reports and big multiplying power charge mode is transformed to small multiplying power charge mode；The small multiplying power charge mode be with first set power as
Standard charges, and the second setting power is more than described first and sets power；
If the second judgement result indicates that the charging real-time voltage is not less than the first early warning voltage value, stop
Charging.
Optionally, the battery information for obtaining each single battery in electric vehicle specifically includes：
The monitoring and early warning platform receives each monomer electricity that the battery management system that transit module is sent acquires in real time
The battery information in pond.
Optionally, the battery management system that the monitoring and early warning platform reception transit module is sent acquires described each in real time
The battery information of single battery specifically includes：
Judge whether the monitoring and early warning platform receives the battery information of each single battery of car-mounted terminal transmission,
Obtain third judging result；
If the third judging result indicates that the monitoring and early warning platform is not received by the institute that the car-mounted terminal is sent
The information of each single battery is stated, then receives the battery information of each single battery of charging pile transmission；Otherwise according to the vapour
Vehicle number judges the battery types of the electric vehicle.
A kind of electric vehicle charging early warning system, including：
Data obtaining module, the battery information for obtaining each single battery in electric vehicle；The battery information packet
Include automobile model, history charge data；
Real-time voltage measurement module, the charging real-time voltage for measuring each single battery in real time；
Battery types judgment module, the battery types for judging the electric vehicle according to the automobile model；
Battery status judgment module, the single battery for judging according to the history charge data electric vehicle
Degree of aging；
Warning information determining module, for according to the battery types and the degree of aging, obtaining the single battery
Warning information；
Early warning value determining module, for determining the first early warning voltage value and the second early warning voltage according to the warning information
Value；The second early warning voltage value is less than the first early warning voltage value；
First judgment module is obtained for judging whether the charging real-time voltage is more than the second early warning voltage value
First judgement result；
Big multiplying power charging module judges that result indicates that the charging real-time voltage is not more than described second for described first
Early warning voltage value then carries out big multiplying power charge mode；The big multiplying power charge mode is to set power using second to carry out as standard
Charging；
Second judgment module judges that result indicates that the charging real-time voltage is more than second early warning for described first
Voltage value, then judge whether the charging real-time voltage is less than the first early warning voltage value, obtains the second judgement result；
Charging variation module, if it is pre- to judge that result indicates that the charging real-time voltage is less than described first for described second
Alert voltage value then sends out alarm and big multiplying power charge mode is transformed to small multiplying power charge mode；The small multiplying power charge mode is
Power is set using first to charge as standard, the second setting power is more than described first and sets power；
Charge stopping modular, if judging that result indicates that the charging real-time voltage is not less than described first for described second
Early warning voltage value then stops charging.
Optionally, described information acquisition module specifically includes：
Information receiving unit receives the battery management system that transit module is sent for the monitoring and early warning platform and adopts in real time
The battery information of each single battery of collection.
Optionally, described information receiving unit specifically includes：
Third judging unit, for judging whether the monitoring and early warning platform receives each list of car-mounted terminal transmission
The battery information of body battery obtains third judging result；
Data cell is converted, indicates that the monitoring and early warning platform is not received by the vehicle for the third judging result
The battery information for each single battery that mounted terminal is sent then receives the battery letter of each single battery of charging pile transmission
Breath；Otherwise the battery types of the electric vehicle are judged according to the automobile model.
According to specific embodiment provided by the invention, the invention discloses following technique effects：
Each single battery of the electric vehicle of battery management system acquisition is received in the present invention by monitoring and early warning platform
Information, car category, information such as history charge data, and then according to above- mentioned information are judged according to the information of each single battery
Real time monitoring and early warning are carried out to rechargeable battery.The charging early warning work of electric vehicle is complete by monitoring and early warning platform in the present invention
At, not only need BMS, alleviate the operating pressure of BMS in this way, avoid because BMS failures occur charging accident, reduce auto cost
And improve safety.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is electric vehicle of embodiment of the present invention charging method for early warning flow chart；
Fig. 2 is electric vehicle of embodiment of the present invention charging early warning system module map；
Fig. 3 is batteries of electric automobile of embodiment of the present invention voltage and battery dump energy relational graph；
Fig. 4 is the trend chart of cell voltage under difference rate of charge of the embodiment of the present invention；
Fig. 5 is the trend chart of battery temperature under difference rate of charge of the embodiment of the present invention；
Fig. 6 is voltage change ratio curve graph of the embodiment of the present invention；
Fig. 7 is rate of temperature change curve graph of the embodiment of the present invention；
Fig. 8 (a) is variation diagram of the voltage change ratio of the embodiment of the present invention with voltage；
Fig. 8 (b) is variation enlarged drawing of the voltage change ratio of the embodiment of the present invention with voltage.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of electric vehicle charging method for early warning and systems, solve battery management system not
The problem of early warning being carried out to batteries of electric automobile in real time.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is electric vehicle of embodiment of the present invention charging method for early warning flow chart.Referring to Fig. 1, a kind of electric vehicle charging
Method for early warning, including：
Step 101：Obtain the battery information of each single battery in electric vehicle；The battery information includes automobile type
Number, history charge data；
Step 102：The charging real-time voltage of each single battery is measured in real time；
Step 103：The battery types of the electric vehicle are judged according to the automobile model；
Step 104：The degree of aging of the single battery of the electric vehicle is judged according to the history charge data；
Step 105：According to the battery types and the degree of aging, the warning information of the single battery is obtained；
Step 106：The first early warning voltage value and the second early warning voltage value are determined according to the warning information；Described second is pre-
Alert voltage value is less than the first early warning voltage value；
Step 107：Judge whether the charging real-time voltage is more than the second early warning voltage value, obtains the first judgement knot
Fruit；
Step 108：If the first judgement result indicates that the charging real-time voltage is not more than the second early warning voltage
Value, then carry out big multiplying power charge mode；The big multiplying power charge mode is to set power using second to charge as standard；
Step 109：If the first judgement result indicates that the charging real-time voltage is more than the second early warning voltage value,
Then judge whether the charging real-time voltage is less than the first early warning voltage value, obtains the second judgement result；
Step 110：If the second judgement result indicates that the charging real-time voltage is less than the first early warning voltage value
It then sends out alarm and big multiplying power charge mode is transformed to small multiplying power charge mode；The small multiplying power charge mode is to be set with first
It is that standard charges to determine power, and the second setting power is more than described first and sets power；
Step 111：If the second judgement result indicates that the charging real-time voltage is not less than the first early warning voltage
Value, then stop charging.
The above method is used to provide more true and reliable warning information safely for charging batteries of electric automobile, and BMS is only
The information collection function for serving as each single battery, extraction and judgement to information are all completed by early warning platform, this mitigates significantly
The operating pressure of BMS, advantageously reduces cost.
Step 101 specifically includes：
The monitoring and early warning platform receives each monomer electricity that the battery management system that transit module is sent acquires in real time
The battery information in pond.
The monitoring and early warning platform receives what the battery management system that transit module is sent acquired in real time in the above-mentioned methods
The battery information of each single battery specifically includes：
Judge whether the monitoring and early warning platform receives the battery information of each single battery of car-mounted terminal transmission,
Obtain third judging result；
If the third judging result indicates that the monitoring and early warning platform is not received by the institute that the car-mounted terminal is sent
The information of each single battery is stated, then receives the battery information of each single battery of charging pile transmission；
Otherwise the battery types of the electric vehicle are judged according to the automobile model.
Fig. 2 is electric vehicle of embodiment of the present invention charging early warning system module map.Referring to Fig. 2, a kind of electric vehicle charging
Early warning system, including：
Data obtaining module 201, the battery information for obtaining each single battery in electric vehicle；The battery information
Including automobile model, history charge data；
Real-time voltage measurement module 202, the charging real-time voltage for measuring each single battery in real time；
Battery types judgment module 203, the battery types for judging the electric vehicle according to the automobile model；
Battery status judgment module 204, the monomer electricity for judging the electric vehicle according to the history charge data
The degree of aging in pond；
Warning information determining module 205, for according to the battery types and the degree of aging, obtaining the monomer electricity
The warning information in pond；
Early warning value determining module 206, for determining the first early warning voltage value and the second early warning electricity according to the warning information
Pressure value；The second early warning voltage value is less than the first early warning voltage value；
First judgment module 207 is obtained for judging whether the charging real-time voltage is more than the second early warning voltage value
To the first judgement result；
Big multiplying power charging module 208 judges that result indicates the charging real-time voltage no more than described for described first
Second early warning voltage value then carries out big multiplying power charge mode；The big multiplying power charge mode is to set power as standard using second
It charges；
Second judgment module 209 judges that result indicates that the charging real-time voltage is more than described second for described first
Early warning voltage value, then judge whether the charging real-time voltage is less than the first early warning voltage value, obtains the second judgement result；
Charging variation module 210, if judging that result indicates the charging real-time voltage less than described for described second
One early warning voltage value then sends out alarm and big multiplying power charge mode is transformed to small multiplying power charge mode；The small multiplying power charging mould
Formula is to set power using first to charge as standard, and the second setting power is more than described first and sets power；
Charge stopping modular 211, if judging that result indicates the charging real-time voltage not less than described for described second
First early warning voltage value then stops charging.
Ensure that the charging early warning work of electric vehicle is completed by early warning platform using above system in the present invention, not only needs
BMS is wanted, alleviates the operating pressure of BMS in this way, avoids that charging accident occurs because of BMS failures, reduces auto cost and improve
Safety.
The specific method that the warning information of single battery is obtained in warning information determining module 205 is：Monitoring and early warning is flat
Database is set up in platform, databases contain multigroup battery information, and in every group of battery information all include corresponding battery
Type, degree of aging and warning information.It can be looked in the database after the battery types and degree of aging for obtaining vehicle in real time
Corresponding warning information in the case of to same battery type and degree of aging, this warning information are the early warning letter of single battery
Breath.
Wherein, described information acquisition module 201 specifically includes：
Information receiving unit receives the battery management system that transit module is sent for the monitoring and early warning platform and adopts in real time
The battery information of each single battery of collection.
Described information receiving unit specifically includes：
Third judging unit, for judging whether the monitoring and early warning platform receives described in the car-mounted terminal transmission
The battery information of each single battery obtains third judging result；
Data cell is converted, indicates that the monitoring and early warning platform is not received by the vehicle for the third judging result
The battery information for each single battery that mounted terminal is sent then receives the electricity for each single battery that the charging pile is sent
Pond information.
Monitoring and early warning platform can also be tested by routine test to each in the database of monitoring and early warning platform in the present invention
Battery is updated in the warning information of different degree of agings, makes charging monitoring safer in this way.
Fig. 3 is batteries of electric automobile of embodiment of the present invention voltage and battery dump energy relational graph, all types of referring to Fig. 3
Battery is extracted in the warning information of different degree of agings by experiment：
(1) constant-current charge is carried out to the battery of different type, different degree of agings with different rate of charge, and does not set and cuts
Only voltage, until the voltage V and state-of-charge SOC of battery deformation record battery.
(2) it makes using voltage V as abscissa, using dV/dSOC as the curve of ordinate.
(3) made curve has a peak, and corresponding voltage value is the second early warning voltage value when being started with peak, most with peak value
Corresponding voltage is the first early warning voltage value when big.
Meanwhile the extracting method of the first early warning voltage value and the second early warning voltage value is further related in the present invention.Specific side
Method is：
(1) fundamental voltage and temperature profile when battery in the case of different multiplying charges to swollen packet are drawn, referring to Fig. 4 and
Fig. 5.By that can be obtained to experimental result comparative analysis, voltage and Wen Sheng cannot function as the safe characterization ginseng of on-line monitoring battery charging
Number, because the variation of Wen Sheng and voltage is too big under different multiplying, if the parameter as characterization charging safety, needs a large amount of realities
It tests and battery is demarcated, obtain rule.
(2) to charging curve when carries out feature extraction, and demonstration expresses the validity of warning information using electricity with extracted amount
The curve of buckling rate (Fig. 6) and rate of temperature change (Fig. 7) characterization, by treated, analysis of experimental data can obtain：Using voltage
Change rate and the rate of temperature change characterization charging direct form using temperature and voltage of security parameter ratio are reasonable, because different times
Voltage change ratio curve and rate of temperature change curve under rate have identical shape.
By taking voltage change ratio as an example, each rate of charge corresponds to a peak value, makees at the time of peak value being selected to start
For the second alternative early warning voltage value, the first early warning voltage value at the time of reaching peak value alternately.
By taking rate of temperature change as an example, each rate of charge corresponds to an inflection point, this inflection point alternately second pre-
Alert voltage value.
The the second early warning voltage value lifted from rate of temperature change and the second early warning voltage value extracted from voltage change ratio into
Row comparison finds to shift to an earlier date a period of time than the information extracted from rate of temperature change from the information that voltage change ratio extracts.
By analyzing above, as warning information when being originated using voltage change ratio peak value and when peak value maximum, but it is different
Rate of charge under value also have certain gap, it is online to carry out early warning and acquire a certain degree of difficulty, need to recognize rate of charge, into
And decouple, finally pre-warning signal is provided under obtained rate of charge.
(3) the security boundary parameter that charges is further processed simplification
Using voltage change ratio as ordinate, voltage is drawn for abscissa, and referring to Fig. 8 (a), Fig. 8 (b), discovery is filled in difference
The voltage value of the peak value initial time of every curve is very close under electric multiplying power, is 3.5V or so, peak value is also very close to, about
For 4.1V or so.Corresponding voltage is the second early warning voltage value when peak therefore use to originate, and the corresponding voltage of peak maximum is the
One early warning voltage value.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is said referring to method part
It is bright.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (6)
- The method for early warning 1. a kind of electric vehicle charges, which is characterized in that including：Obtain the battery information of each single battery in electric vehicle；The battery information includes automobile model, history charging number According to；The charging real-time voltage of each single battery is measured in real time；The battery types of the electric vehicle are judged according to the automobile model；The degree of aging of the single battery of the electric vehicle is judged according to the history charge data；According to the battery types and the degree of aging, the warning information of the single battery is obtained；The first early warning voltage value and the second early warning voltage value are determined according to the warning information；The second early warning voltage value is less than The first early warning voltage value；Judge whether the charging real-time voltage is more than or equal to the second early warning voltage value, obtains the first judgement result；If the first judgement result indicates that the charging real-time voltage is not more than the second early warning voltage value, big times is carried out Rate charge mode；The big multiplying power charge mode is to set power using second to charge as standard；If the first judgement result indicates that the charging real-time voltage is more than the second early warning voltage value, filled described in judgement Whether electric real-time voltage is less than the first early warning voltage value, obtains the second judgement result；If the second judgement result indicates that the charging real-time voltage is less than the first early warning voltage value, alarm is sent out simultaneously Big multiplying power charge mode is transformed to small multiplying power charge mode；The small multiplying power charge mode is to set power as standard using first It charges, the second setting power is more than described first and sets power；If the second judgement result indicates that the charging real-time voltage is not less than the first early warning voltage value, stopping is filled Electricity.
- 2. method for early warning according to claim 1, which is characterized in that each single battery obtained in electric vehicle Battery information specifically includes：The monitoring and early warning platform receives each single battery that the battery management system that transit module is sent acquires in real time Battery information.
- 3. method for early warning according to claim 2, which is characterized in that the monitoring and early warning platform receives transit module and sends The battery information of each single battery that acquires in real time of battery management system specifically include：Judge whether the monitoring and early warning platform receives the battery information of each single battery of car-mounted terminal transmission, obtains Third judging result；If the third judging result indicates that the monitoring and early warning platform is not received by the described each of the car-mounted terminal transmission The information of single battery then receives the battery information of each single battery of charging pile transmission；Otherwise according to the automobile type The battery types of number judgement electric vehicle.
- The early warning system 4. a kind of electric vehicle charges, which is characterized in that including：Data obtaining module, the battery information for obtaining each single battery in electric vehicle；The battery information includes vapour Vehicle number, history charge data；Real-time voltage measurement module, the charging real-time voltage for measuring each single battery in real time；Battery types judgment module, the battery types for judging the electric vehicle according to the automobile model；Battery status judgment module, the aging of the single battery for judging the electric vehicle according to the history charge data Degree；Warning information determining module, for according to the battery types and the degree of aging, obtaining the pre- of the single battery Alert information；Early warning value determining module, for determining the first early warning voltage value and the second early warning voltage value according to the warning information；Institute It states the second early warning voltage value and is less than the first early warning voltage value；First judgment module obtains first for judging whether the charging real-time voltage is more than the second early warning voltage value Judge result；Big multiplying power charging module judges that result indicates that the charging real-time voltage is not more than second early warning for described first Voltage value then carries out big multiplying power charge mode；The big multiplying power charge mode is to set power using second to charge as standard；Second judgment module judges that result indicates that the charging real-time voltage is more than the second early warning voltage for described first Value, then judge whether the charging real-time voltage is less than the first early warning voltage value, obtains the second judgement result；Charging variation module, if judging that result indicates that the charging real-time voltage is less than first early warning electricity for described second Pressure value then sends out alarm and big multiplying power charge mode is transformed to small multiplying power charge mode；The small multiplying power charge mode is with the One sets power charges as standard, and the second setting power is more than described first and sets power；Charge stopping modular, if judging that result indicates that the charging real-time voltage is not less than first early warning for described second Voltage value then stops charging.
- 5. early warning system according to claim 4, which is characterized in that described information acquisition module specifically includes：Information receiving unit receives what the battery management system that transit module is sent acquired in real time for the monitoring and early warning platform The battery information of each single battery.
- 6. early warning system according to claim 5, which is characterized in that described information receiving unit specifically includes：Third judging unit, for judging whether the monitoring and early warning platform receives each monomer electricity of car-mounted terminal transmission The battery information in pond obtains third judging result；Data cell is converted, indicates that the monitoring and early warning platform is not received by the vehicle-mounted end for the third judging result The battery information for holding each single battery sent then receives the battery information of each single battery of charging pile transmission； Otherwise the battery types of the electric vehicle are judged according to the automobile model.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109724812A (en) * | 2018-12-29 | 2019-05-07 | 彩虹无线（北京）新技术有限公司 | Method, apparatus, storage medium and the terminal device of vehicle trouble early warning |
| CN110515005A (en) * | 2019-08-13 | 2019-11-29 | 上海欣诣科技有限公司 | A kind of spontaneous combustion early warning system for the electric car in charging pile monitoring charging |
| CN110861531A (en) * | 2019-11-27 | 2020-03-06 | 四川野马汽车股份有限公司 | Power battery failure early warning system and method |
| CN111483350A (en) * | 2020-05-15 | 2020-08-04 | 安庆师范大学 | Balance and micro-short circuit detection method for power battery pack |
| CN111983463A (en) * | 2020-07-20 | 2020-11-24 | 武汉数值仿真技术研究院有限公司 | Lithium ion battery residual capacity early warning diagnosis test method for electric automobile |
| CN112512855A (en) * | 2018-10-30 | 2021-03-16 | 宝马股份公司 | System for a drive energy accumulator for a hybrid or electric vehicle and method for charging a drive energy accumulator for a hybrid or electric vehicle |
| CN113459898A (en) * | 2021-06-24 | 2021-10-01 | 云度新能源汽车有限公司 | Intelligent remote diagnosis method and system for battery overcharge of electric vehicle |
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