CN103746422A - Direct current charge and discharge control method based on interface intelligent identification technology - Google Patents
Direct current charge and discharge control method based on interface intelligent identification technology Download PDFInfo
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Abstract
The invention discloses a direct current charge and discharge control method based on an interface intelligent identification technology. The direct current charge and discharge control method comprises several steps including charge and discharge interface intelligent identification control, charge and discharge handshake control, charge and discharge mode selection and charge and discharge parameter configuration control, charge and discharge process control, and charge and discharge completion control. Through studying the communication principle and the communication requirement of an electric automobile off-board conduction type charge and discharge machine and a battery management system, the charge and discharge control method applicable to the communication is provided for realizing the dispatching management of electric automobile charge and discharge operation, an electric automobile is enabled to be reliably and flexibly connected into an electric network to realize charge and discharge, and meanwhile, the electric network side load predication and load regulation characteristic demands are favorably met.
Description
Technical field
The invention belongs to electric automobile and discharge and recharge control technology field, relate in particular to a kind of direct current charge/discharge control method based on interface intelligent identification technology.
Background technology
At present, the pressure of energy scarcity and ecological deterioration increases day by day, the cry of energy-saving and emission-reduction is more and more higher, electric automobile is because its energy-conserving and environment-protective are by extensive concern, world Ge great motor corporation and both at home and abroad Ge great scientific research institution and institution of higher learning are devoted to the research of clean energy-saving automobile one after another, aspect electric vehicle engineering and battery technology, are all making significant progress.
After the electric automobile of scale comes into operation, its random charging behavior will bring the load rapid growth of a new round, and the electric power system that power load peak-valley difference is strengthened day by day, has increased huge power supply pressure.The in the situation that of the unordered charging of electric automobile, a large amount of charging electric vehicles will aggravate the problems such as existing voltage-drop, branch road capacity do not mate, and are not changing under the prerequisite of existing infrastructure, must limit the scale of electric automobile access electric power system.Therefore, the necessary standard of the charging of electric automobile is controlled.According to statistics, most of vehicles only had the time of 5% left and right in transport condition in one day, and almost 95% time is in idle condition.Therefore can control electric automobile charged in the load valley phase, and the design capacity of batteries of electric automobile is generally much larger than the normal power consumption capacity travelling on and off duty, electric automobile is not affecting under the prerequisite that self driving course requires, peak period also can be by portion of energy feedback grid at load.The relation that realizes energy and information bidirectional exchange between this electric automobile and electrical network, is referred to as electric automobile and electrical network interactive (Vehicle to Grid, V2G).
The huge electric automobile of quantity is realized scale by intelligent power network platform and is applied, and effectively regulates network load peak-valley difference, reduces traditional peak regulation reserve generation capacity, improves the effective rate of utilization of electrical network; Along with the raising of power distribution network intelligent level and enriching of workload demand management means, electric automobile can also complete the electrical network assistant services such as demand response, further improves electrical network efficiency simultaneously; In addition, in micro-grid system, electric automobile receives electric energy when renewable energy power generation power is lower compared with large and network load, when renewable energy power generation power is higher compared with low and network load, discharges electric energy, and auxiliary electrical network is effectively received fluctuation renewable energy power generation capacity.Meanwhile, by the implementation of tou power price and paid electrical network assistant service policy, electric automobile user can charge by the low electricity price of low-valley interval not affecting under the prerequisite of self using, and in peak period, direct economic interests are obtained in higher electricity price electric discharge.
The concept of V2G is after the Willet Kempton proposition that the special vertical Hua Da of the 1997 Nian You U.S. is learned, and various countries have launched every research of V2G technology in succession.And at home, the research of V2G technology is still in the starting stage.As far back as the Eleventh Five-Year Plan initial stage, China State Grid Corporation of China has just proposed to make full use of the imagination that night load trough-electricity is charging electric vehicle.Nowadays, this plans will progressively realize during " 12 ".In addition, China also will greatly develop the region electrically-charging equipments such as parking lot, garage parking, residential quarter or parking stall.Electric automobile discharges and recharges control mode as an important component part of V2G technical research, to realizing real time information exchange between electric automobile BMS and electric automobile charge-discharge machine, the operation that discharges and recharges of rationally controlling electric automobile according to both sides' demand has great significance.
Summary of the invention
The invention provides a kind of direct current charge/discharge control method based on interface intelligent identification technology, for communicating by letter between electric automobile charge-discharge machine and battery management system, provide a kind of control mode method that discharges and recharges, for reasonably managing charge and discharge process, reduce and discharge and recharge fault, auxiliary realization discharges and recharges in order, improve power distribution network efficiency, meet the management that discharges and recharges behavior under the different demands of electric automobile user simultaneously.
Technical problem to be solved by this invention is achieved through the following technical solutions:
A direct current charge/discharge control method based on interface intelligent identification technology, is characterized in that, comprises the following steps:
(1) discharging and recharging interface Intelligent Recognition controls: vehicle interface docking, and controller of vehicle judges vehicle interface state and the motor type accessing by measuring the voltage of test point 2;
(2) discharge and recharge the control of shaking hands: controller of vehicle sends identification message to charger or charge-discharge machine after judging motor type;
(3) charge and discharge mode is selected and parameter configuration is controlled: complete discharge and recharge shake hands after electric automobile according to the control command of controller of vehicle, select charge mode or discharge mode, if selected charge mode to carry out charge parameter configuration, if selected discharge mode to carry out discharge parameter configuration;
(4) charge and discharge process is controlled: according to selected charge mode or discharge mode, carry out charge mode control or discharge mode control;
(5) discharge and recharge finishing control: stop charging or electric discharge, controller of vehicle and charger/charge-discharge machine mutually send and discharge and recharge accounting message and carry out both sides' clearing.
Preferably, in described step (1), vehicle interface comprises vehicle plug and vehicle socket, vehicle plug is connected with motor side, vehicle socket is connected with vehicle end, the vehicle interface mode of charge mode 4 and connected mode C in described vehicle interface employing GB/T20234.3-2011, and increase resistance R 6 to plug end.
Preferably, described step (1) if in the magnitude of voltage of test point 2 be 6V, what show to be connected with vehicle is charger, if the magnitude of voltage of test point 2 is 8V, what show to be connected with vehicle is charge-discharge machine.
Preferably, described step (3) if in be chosen as charge mode, charger/charge-discharge machine sends the message of the maximum fan-out capability that charger/charge-discharge machine can provide to vehicle control system, vehicle control system judges whether to charge according to the maximum fan-out capability of charger/charge-discharge machine in this message, if be chosen as discharge mode, charge-discharge machine and higher level main website carry out information interaction, according to the electric discharge demand of higher level main website fixed time broadcast, determine whether accepting electric automobile electric discharge.
Preferably, described step (4) if in carry out charge mode while controlling, in the whole charging stage, controller of vehicle sends battery charging demand to charger/charge-discharge machine in real time, charge-discharge machine adjusts charging voltage according to battery charging demand and charging current is normally carried out to guarantee charging process, and charger/charge-discharge machine and controller of vehicle send charged state separately mutually in whole charging process, if while carrying out discharge mode control, charge-discharge machine and higher level main website carry out alternately, if higher level main website has electric discharge demand, and the discharging current under normal voltage output and discharge time demand and controller of vehicle enter discharge regime after consensus, at whole discharge regime controller of vehicle, to charge-discharge machine, send battery status information in real time.
Preferably, described step (3), (4), (5) time used surpass setting range, enter wrong handling process, turn back to afterwards step (2) or step (1).
Preferably, described wrong handling process can judge physical connection, if determine physical connection, disconnects, and turns back to step (1), if judgement physical connection normally turns back to step (2).
The beneficial effect that the present invention reaches is: the vehicle interface mode that adopts charge mode 4 in GB/T20234.3-2011 and connected mode C by vehicle interface, and to plug end, increase that resistance R 6 will discharge and recharge interface and generic interface is made differentiation, guarantee the consistency of DC charging motor and direct current charge-discharge machine interface, electric automobile can be distinguished DC charging motor and direct current charge-discharge machine by this technical intelligence identification.Thereby ensure the safety of electric automobile and charging device.By discharging and recharging interface Intelligent Recognition, control, discharge and recharge the control of shaking hands, charge and discharge mode selection and parameter configuration control, charge and discharge process control, discharge and recharge the control flow that discharges and recharges that a series of control steps such as finishing control provide a set of complete safety.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention;
Fig. 2 is that direct current of the present invention discharges and recharges safety system basic scheme circuit diagram.
Embodiment
In order to further describe technical characterstic of the present invention and effect, below in conjunction with the drawings and specific embodiments, the present invention is described further.
See figures.1.and.2, a kind of direct current charge/discharge control method based on interface intelligent identification technology, comprise that discharging and recharging interface Intelligent Recognition controls, discharge and recharge the control of shaking hands, charge and discharge mode selection control, discharging and recharging parameter configuration controls, charge and discharge process is controlled, and discharges and recharges several large steps such as finishing control.
To have what after the electric automobile that discharges and recharges interface is connected with DC charging motor or direct current charge-discharge machine, first enter be to discharge and recharge interface Intelligent Recognition to control the stage when one: in this stage, adopt in GB GB/T20234.3-2011, the vehicle interface mode of charge mode 4 and connected mode C, and for discharging and recharging interface, add R6 to make differentiation with common charger interface on the basis of this interface, after vehicle interface connects, treat that non-Vehicular charger/charge-discharge machine completes self check, closed contactor K3 and K4, make the loop conducting of low pressure auxiliary power supply.After obtaining the low pressure accessory power supply power supply that charger/charge-discharge machine provides, whether controller of vehicle judges vehicle interface exact connect ion by measuring the magnitude of voltage of test point 2.If the magnitude of voltage of test point 2 is 6V, what show to be connected with vehicle is the vehicle plug of common charger, if the magnitude of voltage of test point 2 is 8V, what show to be connected with vehicle is charge-discharge machine.Thereby the coupling of the compatibility between assurance charging inlet, the safety of guarantee electricity consumption.
Next enter and charging and discharging electric discharge and shake hands the control stage, judging accessed controller of vehicle (or battery management system) the identification message transmission Correlation Identification information sending by the cycle after being charger or charge-discharge machine to charger/charge-discharge machine.
After completing the control of interface Intelligent Recognition and shaking hands, electric automobile need to be selected charge mode or discharge mode according to the control command of controller of vehicle.If charge-discharge machine receives the charge command of electric automobile, the message of the maximum fan-out capability that charger/charge-discharge machine can provide to vehicle control system transmission charge-discharge machine.Vehicle control system judges whether to charge according to the maximum fan-out capability of charger/charge-discharge machine.Can, if charge-discharge machine receives the electric discharge order of electric automobile, charge-discharge machine need to carry out information interaction with higher level main website, decide the electric discharge order that receive electric automobile according to the electric discharge demand of higher level main website fixed time broadcast.
Enter again charge and discharge process and control, after charge and discharge mode selection and parameter configuration complete, according to the pattern of selecting, carry out different process control.If what select is charge mode, in the whole charging stage, controller of vehicle sends battery requirements to charger/charge-discharge machine in real time, and charger/charge-discharge machine adjusts charging voltage according to battery charging demand and charging current is normally carried out to guarantee charging process.And in whole charging process, charger/charge-discharge machine and controller of vehicle send charged state separately mutually.In addition, controller of vehicle sends the information such as the concrete state information of power accumulator and voltage, temperature as requested to charger/charge-discharge machine.If what select is discharge mode, charge-discharge machine and higher level main website are mutual, and higher level main website has electric discharge demand, and the discharging current under normal voltage is exported and discharge time demand and controller of vehicle consensus after, the discharge process of being allowed for access.At whole discharge regime, controller of vehicle sends the concrete state information of power accumulator to charge-discharge machine in real time, and charge-discharge machine, according to the discharge voltage of storage battery and discharging current, is adjusted inversion strategy in real time.And in whole discharge process, charger and controller of vehicle send discharge condition separately mutually, finally wait to discharge and recharge finish after controller of vehicle and DC charging motor or direct current charge-discharge machine mutually send and discharge and recharge accounting message, according to the information of statistics, complete the clearing of expense.
Fig. 2 is that direct current discharges and recharges safety system basic scheme; comprise non-Vehicular charger control device, resistance R 1, R2, R3, R4, R5, R6, switch S, direct current power supply loop contactor K1 and K2, low pressure auxiliary power supply loop contactor K3 and K4, charge circuit contactor K5 and K6, electronic lock and controller of vehicle, wherein controller of vehicle can be integrated in battery management system.Resistance R 2, R3 and R6 are arranged on vehicle plug, and resistance R 4 is arranged on vehicle socket.Switch S is the inside normally closed switch of vehicle plug, and after vehicle plug is connected completely with vehicle socket, switch S is closed.In whole charge and discharge process, non-vehicle-mounted charge-discharge machine control device should be able to be monitored contactor K1, K2, and relay K 3, K4 and electronic lock state are also controlled its connection and shutoff.Electric automobile vehicle control device can be monitored contactor K5 and K6 state and be controlled its connection and shutoff.The recommended parameter that the state definition of charge and discharge process and direct current discharge and recharge safety system is respectively in Table 1 and table 2.
The definition of table 1 charge and discharge process state
The recommended parameter of table 2 DC charging safety system
Above-described embodiment does not limit the present invention in any form, all take to be equal to replace or technical scheme that the form of equivalent transformation obtains, within all dropping on protection scope of the present invention.
Claims (7)
1. the direct current charge/discharge control method based on interface intelligent identification technology, is characterized in that, comprises the following steps:
(1) discharging and recharging interface Intelligent Recognition controls: vehicle interface docking, and controller of vehicle judges vehicle interface state and the motor type accessing by measuring the voltage of test point 2;
(2) discharge and recharge the control of shaking hands: controller of vehicle sends identification message to charger or charge-discharge machine after judging motor type;
(3) charge and discharge mode is selected and parameter configuration is controlled: complete discharge and recharge shake hands after electric automobile according to the control command of controller of vehicle, select charge mode or discharge mode, if selected charge mode to carry out charge parameter configuration, if selected discharge mode to carry out discharge parameter configuration;
(4) charge and discharge process is controlled: according to selected charge mode or discharge mode, carry out charge mode control or discharge mode control;
(5) discharge and recharge finishing control: stop charging or electric discharge, controller of vehicle and charger/charge-discharge machine mutually send and discharge and recharge accounting message and carry out both sides' clearing.
2. a kind of direct current charge/discharge control method based on interface intelligent identification technology according to claim 1, it is characterized in that: in described step (1), vehicle interface comprises vehicle plug and vehicle socket, vehicle plug is connected with motor side, vehicle socket is connected with vehicle end, the vehicle interface mode of charge mode 4 and connected mode C in described vehicle interface employing GB/T20234.3-2011, and increase resistance R 6 to plug end.
3. a kind of direct current charge/discharge control method based on interface intelligent identification technology according to claim 1, it is characterized in that: described step (1) if in the magnitude of voltage of test point 2 be 6V, what show to be connected with vehicle is charger, if the magnitude of voltage of test point 2 is 8V, what show to be connected with vehicle is charge-discharge machine.
4. a kind of direct current charge/discharge control method based on interface intelligent identification technology according to claim 1, it is characterized in that: described step (3) if in be chosen as charge mode, charger/charge-discharge machine sends the message of the maximum fan-out capability that charger/charge-discharge machine can provide to vehicle control system, vehicle control system judges whether to charge according to the maximum fan-out capability of charger/charge-discharge machine in this message, if be chosen as discharge mode, charge-discharge machine and higher level main website carry out information interaction, according to the electric discharge demand of higher level main website fixed time broadcast, determine whether accepting electric automobile electric discharge.
5. a kind of direct current charge/discharge control method based on interface intelligent identification technology according to claim 1, it is characterized in that: described step (4) if in carry out charge mode while controlling, in the whole charging stage, controller of vehicle sends battery charging demand to charger/charge-discharge machine in real time, charge-discharge machine adjusts charging voltage according to battery charging demand and charging current is normally carried out to guarantee charging process, and charger/charge-discharge machine and controller of vehicle send charged state separately mutually in whole charging process, if while carrying out discharge mode control, charge-discharge machine and higher level main website carry out alternately, if higher level main website has electric discharge demand, and the discharging current under normal voltage output and discharge time demand and controller of vehicle enter discharge regime after consensus, at whole discharge regime controller of vehicle, to charge-discharge machine, send battery status information in real time.
6. a kind of direct current charge/discharge control method based on interface intelligent identification technology according to claim 1, it is characterized in that: described step (3), (4), (5) time used surpass setting range, enter wrong handling process, turn back to afterwards step (2) or step (1).
7. a kind of direct current charge/discharge control method based on interface intelligent identification technology according to claim 6, it is characterized in that: described wrong handling process can judge physical connection, if determining physical connection disconnects, turn back to step (1), if judgement physical connection normally turns back to step (2).
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| CN109017396A (en) * | 2018-08-10 | 2018-12-18 | 北京车和家信息技术有限公司 | Portable non-on-board charger control method, adaptation controller and electric vehicle |
| CN110103766A (en) * | 2019-05-05 | 2019-08-09 | 北京新能源汽车股份有限公司 | Charge-discharge system and its control method based on vehicle |
| CN110723002A (en) * | 2019-10-28 | 2020-01-24 | 大陆投资(中国)有限公司 | Mobile charging trolley |
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