CN102044723B - Intelligent charging method for electromobile - Google Patents
Intelligent charging method for electromobile Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to an intelligent charging method for electromobiles, comprising the following steps: introducing factors, such as electrical load factor of an electric network, identification charging time, electromobile battery states and the like on the basis of a common charger; automatically and optimally calculating the current charging policy for the whole electromobile; and automatically regulating charging power and charging time so as to achieve the design targets of safe charging (reducing impact on network load), economic charging (minimizing charging cost) and service life extension of the battery. The invention comprises an EC (Economic Charging) mode for maximizing charging quantity in the low power period of electric network, and a FC (Fast Charging) mode for fast charging the battery at allowable maximum charging power during initial charging.
Description
Technical field
The invention belongs to the charging system for electric automobile designing technique, particularly a kind of can the intelligent automatic dispensed charging interval, charge power, processing and send battery charging state information etc., car load is the identification of driver intention automatically, automatically implement intelligent charging, so that minimum, fastest Intelligent charging system and the control method thereof of charging cost.
Background technology
At present, the charging method of onboard charger of electric car is first constant current constant voltages then all basically, method is relatively simple, and charge power is at 2.2～3.3kw, maximum defective is not consider in the charging process that the power load of current electrical network, charge power size are that state-of-charge SOC according to battery sets, beginning is powerful constant current charge, converts low power constant voltage charge when being full of soon to again.From the power load change curve of electrical network, can see, two peaks of power consumption can appear in one day in electrical network, appear at respectively noon and evenings seven point, and according to majority with car custom, use charge evening on daytime, return from work afternoon, will begin charging, like this will be overlapping with the electrical network peak of power consumption, the electrical network Electrical Safety is impacted, along with electric motor car is more and more, this shock effect meeting is more and more obvious.Be both national grid and seen this problem, picture has begun among a small circle pilot by the charging method of period difference valuation, this species diversity can be accurate to little period or even Spot Price later on, this electricity price is regulated according to load factor certainly simultaneously, be that the lower electricity price of load factor is more cheap, during this time charging, our charging cost also can be lower.
Summary of the invention
Intelligent charging method of the present invention, the factors such as the electrical network power load factor, identification charging interval, Vehicular battery state of introducing on the basis of common charger, Automatic Optimal calculates car load when time charging strategy, automatically regulate charge power and charging interval, to arrive safe charging (reducing the impact to network load), economic charging (charging cost minimizes), raising battery as design object.
Concrete technical scheme is as follows:
A kind of Intelligent charging method for electromobile is characterized in that, it comprises the steps: step 1: the two-phase alternating current of electrical network is through behind the oscillator, and oscillator calculates the current load factor B of electrical network in real time; Step 2: charger obtains the current electric loading rate of electrical network; Step 3: charger simulates from current to following 24 hours power load curves with interior electrical network according to the information calculations such as electric loading change curve in electrical network past; Step 4: the battery management system Real-time Collection is power brick and car load information out, and the information such as battery charge state SOC, voltage, temperature are issued charger, sends charging instruction according to information such as charge cable connection status to charger simultaneously; Step 5: charger is judged this charge mode according to current residing time period, driver's the information such as charge mode request; Step 6: charger is according to the battery information of battery management system, calculate the subsequently charging strategy of the information such as charge power of each time period of total electric weight of comprising charging needs this time, charging interval, calculating, draw subsequently each charger constantly power output of charging; Step 7: the closed charging of charger main relay begins charging.
Preferably, in the step 1, described oscillator calculates the current load factor B of electrical network in real time according to parameters such as grid voltage change, current harmonicss.
Preferably, in the step 2, described charger is connected AC power by charging socket with charging wire.
Preferably, in the step 3, charger reads the power load data of every day of electrical network in the regular period, find out one day the most similar to the same day, then draw weighted value according to date on the same day, air themperature, air humidity etc. one day the most similar data are revised automatically, dope that the network load change curve comes the needed network load change curve of analog charge device in following one day.
Preferably, the power load data of described electrical network every day comprise change in voltage, load rate of grid variation etc.
Preferably, in the step 5, be divided into two time periods according to subsequently 24 hours of charging interval: time period E and time period F; Current time is in and allows economic charge mode EC and fast charge mode FC in the time period E, and current time is in and then only allows fast charge mode FC in the time period F.
Preferably, the permission charging interval section of described economic charge mode EC acquiescence is to start working constantly to the vehicle of next setting from now on, during this period of time affect the principle optimal design charge power curve of number C minimum according to charging, Cmin=P * B, wherein P is the charger power output, B is load rate of grid, so that charge capacity is maximized from the electrical network low power consumption time period.
Preferably, described fast charge mode FC is with the shortest charge power curve that designs of charging interval, consider simultaneously maximum charge power that battery temperature at that time, charger temperature, charger allow etc. factor, so that the maximum charge power that charging allows at the very start charges to battery fast.
Preferably, in the step 5, the driver can select to fill soon by manual mode switch, trickle charge or do not select, and send to respectively charger: FC, SC, three kinds of command signals of NC, and driver's selection instruction is superior to the instruction of charger oneself calculating.
Description of drawings
Fig. 1 is Intelligent charging system of electric automobile structural representation of the present invention;
Fig. 2 is the time dependent curve synoptic diagram of load rate of grid;
Fig. 3 is Intelligent charging method for electromobile charge mode decision logic figure of the present invention;
Fig. 4 is the economic charge mode EC of Intelligent charging method for electromobile of the present invention schematic diagram;
Fig. 5 is Intelligent charging method for electromobile fast charge mode FC schematic diagram of the present invention.
Embodiment
The below describes the present invention with reference to the accompanying drawings, and it is a kind of preferred embodiment in the numerous embodiments of the present invention.
A kind of onboard charger of electric car intelligent charging method provided by the invention, system configuration as shown in Figure 1, the electrical network two-phase alternating current is through the power supply oscillator; Be connected to onboard charger by charging wire and charging socket again, charger is connected to battery management system BMS and power brick, and BMS also is connected to power brick.
The two-phase alternating current of electrical network is through behind the oscillator, and oscillator calculates the current load factor B of electrical network in real time according to parameters such as grid voltage change, current harmonicss.Charger is connected AC power by charging socket with charging wire, obtain simultaneously the information such as electric loading rate change curve of the current electric loading rate of electrical network and the past period.The battery management system Real-time Collection is power brick and car load information out, and the information such as battery charge state SOC, voltage, temperature are issued charger, sends charging instruction according to information such as charge cable connection status to charger simultaneously; Charger at first simulates from current to following 24 hours power load curves with interior electrical network according to the information calculations such as electric loading change curve in electrical network past; Simultaneously judge this charge mode according to current residing time period, driver's the information such as charge mode request; Again according to the battery information of BMS, calculate the subsequently charging strategy of the information such as charge power of each time period of total electric weight of comprising charging needs this time, charging interval, calculating, draw subsequently each charger constantly power output of charging; Then closed charging main relay begins charging.Wherein, simulate network load change curve in 24 hours from now on, in fact also be a kind of short-term network load prediction, main method is: according to similar predicted method, system read the regular period (several days, some months or several years, decide on concrete equipment precision) the power load data of interior electrical network every day (comprise change in voltage, load rate of grid variation etc.), find out one day the most similar to the same day, it generally can be nearest one day, then according to date on the same day, air themperature, air humiditys etc. draw weighted value one day the most similar data are revised automatically, dope that the network load change curve comes the needed network load change curve of analog charge device in following one day.
As shown in Figure 2, charger is according to the electrical network load factor from the past period that the power supply oscillator obtains there, simulation and forecast go out electrical network load factor change curve, electricity consumption top and lowest trough occur in subsequently 24 hours moment T2 constantly and T1 constantly, maximum load rate BH and minimum load rate BL; Charger calculates the required total electric weight that this time charges according to the battery information that obtains, and calculates the required charging interval under both economical trickle charge pattern, is divided into two time periods according to subsequently 24 hours of charging interval: time period E and time period F; Current time is in and allows economic charge mode EC and fast charge mode FC in the time period E, and current time is in and then only allows fast charge mode in the time period F.Wherein be used as the separation of time period E and time period F according to peak of power consumption time in 24 hours and low power consumption time, adjust according to required total time of climatic season (summer or winter), the laws of use of vehicle, vehicle etc. again, such as 2 o'clock to 14 o'clock be time period F, 14 to 2 of next day be time period E.
As shown in Figure 3, judge according to residing time period of current time and charge mode switching signal and take which kind of charge mode.Manual mode switch allows that the driver selects to fill soon, trickle charge or do not select, and send to respectively charger: FC, SC, three kinds of command signals of NC, and driver's selection instruction is superior to the instruction of charger oneself calculating; Which namely when the driver selects the FC instruction, be in time period all can only take fast charge mode FC, if select the SC instruction then can only take the charging of EC pattern equally; The mode instruction that the NC instruction does not then calculate change charger oneself;
EC charge mode: as shown in Figure 4, under this pattern, the permission charging interval section of system default is to start working constantly to the vehicle of next setting from now on that (acquiescence is initially set 6 points, charger can according to the actual operating position correction of vehicle in recently a period of time, also can artificially be set the use habit of vehicle according to the driver); System's basis during this period of time: charging affects the principle optimal design charge power curve of number C minimum;
Cmin＝P×B：
Wherein
P is the charger power output;
B is load rate of grid;
So that charge capacity is maximized from the electrical network low power consumption time period;
The FC charge mode: as shown in Figure 5, under this pattern, system is with the shortest charge power curve that designs of charging interval; Consider simultaneously maximum charge power that battery temperature at that time, charger temperature, charger allow etc. factor; So that the maximum charge power that charging allows at the very start charges to battery fast.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (9)
1. an Intelligent charging method for electromobile is characterized in that, it comprises the steps:
Step 1: the two-phase alternating current of electrical network is through behind the oscillator, and oscillator calculates the current load factor B of electrical network in real time;
Step 2: charger obtains the current electric loading rate of electrical network;
Step 3: charger simulates from current to following 24 hours power load curves with interior electrical network according to the electric loading change curve information calculations in electrical network past;
Step 4: the battery management system Real-time Collection is power brick and car load information out, and battery charge state SOC, voltage, temperature information are issued charger, sends charging instruction according to the charge cable connection state information to charger simultaneously;
Step 5: charger is judged this charge mode according to current residing time period, driver's charge mode solicited message;
Step 6: charger is according to the battery information of battery management system, calculate the subsequently charging strategy of the charge power information of each time period of total electric weight of comprising charging needs this time, charging interval, calculating, draw subsequently each charger constantly power output of charging;
Step 7: the closed charging of charger main relay begins charging.
2. Intelligent charging method for electromobile as claimed in claim 1 is characterized in that, in the step 1, described oscillator calculates the current load factor B of electrical network in real time according to grid voltage change, current harmonics parameter.
3. Intelligent charging method for electromobile as claimed in claim 1 is characterized in that, in the step 2, described charger is connected AC power by charging socket with charging wire.
4. Intelligent charging method for electromobile as claimed in claim 1, it is characterized in that, in the step 3, charger reads the power load data of every day of electrical network in the regular period, find out one day the most similar to the same day, then draw weighted value according to date, air themperature, the air humidity on the same day one day the most similar data are revised automatically, dope that the network load change curve comes the needed network load change curve of analog charge device in following one day.
5. Intelligent charging method for electromobile as claimed in claim 4 is characterized in that, the power load data of described electrical network every day comprise that change in voltage, load rate of grid change.
6. Intelligent charging method for electromobile as claimed in claim 1 is characterized in that, in the step 5, is divided into two time periods according to subsequently 24 hours of charging interval: time period E and time period F; Current time is in and allows economic charge mode EC and fast charge mode FC in the time period E, and current time is in and then only allows fast charge mode FC in the time period F.
7. Intelligent charging method for electromobile as claimed in claim 6, it is characterized in that, the permission charging interval section of described economic charge mode EC acquiescence is to start working constantly to the vehicle of next setting from now on, during this period of time affect the principle optimal design charge power curve of number C minimum according to charging, Cmin=P * B, wherein P is the charger power output, and B is load rate of grid, so that charge capacity is maximized from the electrical network low power consumption time period.
8. Intelligent charging method for electromobile as claimed in claim 6, it is characterized in that, described fast charge mode FC is with the shortest charge power curve that designs of charging interval, consider simultaneously the at that time maximum charge power factor (PF) of battery temperature, charger temperature, charger permission, so that the maximum charge power that charging allows at the very start charges to battery fast.
9. Intelligent charging method for electromobile as claimed in claim 1, it is characterized in that, in the step 5, the driver can select to fill soon by manual mode switch, trickle charge or do not select, send to respectively charger: FC, SC, three kinds of command signals of NC, and driver's selection instruction is superior to the instruction that charger oneself calculates.
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Address after: 241000 No. 226 Jin Hua Nan Road, Yijiang hi tech Industrial Development Zone, Anhui, Wuhu Patentee after: Chery New Energy Automobile Co.,Ltd. Address before: 241000 flower road, Yijiang District, Anhui, Wuhu Patentee before: CHERY NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |