Electric vehicle charging control method and system
阅读说明：本技术 一种电动车充电控制方法及系统 (Electric vehicle charging control method and system ) 是由 王聪慧 张臻 曹智慧 乔海强 刘建鹏 胡占磊 单栋梁 赵瑞霞 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种电动车充电控制方法及系统,其主要是先利用射频读卡器读取车辆电子标签信息,其中,电子标签信息包括车辆信息和短距离无线通讯的配置信息；根据获取的短距离无线通讯的配置信息,建立车端与充电桩端的短距离无线通讯连接,将采集的受电弓的位置信息和充电弓的位置信息发送至车端,以使车辆完成停车就位；在车辆停车就位完成后,通过建立车端与充电桩端的无线网络交互充电相关信息,驱动充电弓运动至与受电弓相适配的位置,开始进行充电。即本发明中采用“RFID+微功率通讯+WiFi”的复合通信手段,实现了车端与充电桩端之间的通信的自动连接,能够快速、准确的实现车辆受电弓和充电弓的一对一充电。(The invention relates to a charging control method and a charging control system for an electric vehicle, which mainly utilize a radio frequency card reader to read vehicle electronic tag information, wherein the electronic tag information comprises vehicle information and configuration information of short-distance wireless communication; according to the acquired configuration information of the short-distance wireless communication, establishing short-distance wireless communication connection between the vehicle end and the charging pile end, and sending the acquired position information of the pantograph and the position information of the charging pantograph to the vehicle end so as to enable the vehicle to finish parking and positioning; after the vehicle stops in place, the charging bow is driven to move to a position matched with the pantograph by establishing wireless network interactive charging related information of the vehicle end and the charging pile end, and charging is started. The invention adopts a composite communication means of RFID + micropower communication + WiFi to realize the automatic connection of communication between the vehicle end and the charging pile end, and can quickly and accurately realize the one-to-one charging of the vehicle pantograph and the charging pantograph.)
1. An electric vehicle charging control method is characterized by comprising the following steps:
1) reading electronic tag information of the vehicle by using a radio frequency card reader, wherein the electronic tag information comprises vehicle information and configuration information of short-distance wireless communication;
2) according to the acquired configuration information of the short-distance wireless communication, establishing short-distance wireless communication connection between the vehicle end and the charging pile end, and sending the acquired position information of the pantograph and the position information of the charging pantograph to the vehicle end so as to enable the vehicle to finish parking and positioning;
3) after the vehicle stops in place, wireless network interaction charging information of the vehicle end and the charging pile end is established, the charging bow is driven to move to a position matched with the pantograph, and charging is started.
2. The electric vehicle charging control method according to claim 1, further comprising the steps of obtaining a vehicle VIN code through short-distance wireless communication after the vehicle is parked in place, judging whether the vehicle VIN code is matched with the VIN code stored in the charging post end, and driving the charging pantograph to move to a position matched with the pantograph if the vehicle VIN code is matched with the VIN code stored in the charging post end.
3. The electric vehicle charging control method according to claim 2, wherein the electronic tag information in step 1) further includes configuration information of a wireless network; and establishing wireless network communication connection between the vehicle end and the charging pile end according to the acquired configuration information of the wireless network.
4. The electric vehicle charging control method according to claim 2, wherein the wireless network connection established between the vehicle end and the charging pile end in step 3) is: and applying for acquiring the verification information of the wireless network of the joining vehicle through the established short-distance wireless communication connection, and then joining the wireless network of the vehicle according to the acquired verification information.
5. The electric vehicle charging control method according to claim 4, wherein the wireless network is a wifi network.
6. The charging control system of the electric vehicle is characterized by comprising a vehicle end and a charging pile end, wherein the vehicle end comprises a vehicle-mounted control unit, a first short-distance wireless communication module and a first wireless network module, and the vehicle-mounted control unit is respectively connected with the first short-distance wireless communication module and the first wireless network module; the charging pile end comprises a charging control unit, a second short-distance wireless communication module, a second wireless network module, a radio frequency card reader and a camera, wherein the charging control unit is respectively connected with the second short-distance wireless communication module, the second wireless network module, the radio frequency card reader and the camera; the vehicle-mounted control unit and the charging control unit run computer programs to realize the following methods:
1) reading electronic tag information of the vehicle by using a radio frequency card reader, wherein the electronic tag information comprises vehicle information and configuration information of short-distance wireless communication;
2) according to the acquired configuration information of the short-distance wireless communication, establishing short-distance wireless communication connection between the vehicle end and the charging pile end, and sending the acquired position information of the pantograph and the position information of the charging pantograph to the vehicle end so as to enable the vehicle to finish parking and positioning;
3) after the vehicle stops in place, wireless network interaction charging information of the vehicle end and the charging pile end is established, the charging bow is driven to move to a position matched with the pantograph, and charging is started.
7. The electric vehicle charging control system of claim 6, further comprising a step of obtaining a VIN code of the vehicle through short-distance wireless communication after the vehicle is parked in place, judging whether the VIN code of the vehicle is matched with the VIN code stored in the charging post end, and driving the charging bow to move to a position matched with the pantograph if the VIN code of the vehicle is matched with the VIN code stored in the charging post end.
8. The electric vehicle charging control system of claim 7, wherein the electronic tag information further includes configuration information of a wireless network, and the wireless network communication connection between the vehicle end and the charging pile end is established according to the acquired configuration information of the wireless network.
9. The electric vehicle charging control system of claim 7, wherein the wireless network connection established between the vehicle end and the charging pile end in step 3) is: and applying for acquiring the verification information of the wireless network of the joining vehicle through the established short-distance wireless communication connection, and then joining the wireless network of the vehicle according to the acquired verification information.
10. The electric vehicle charging control system of claim 9, wherein the wireless network is a wifi network.
Technical Field
The invention is suitable for the field of charging of a pantograph of an electric bus, and particularly relates to a charging control method and system of an electric bus.
Background
The existing electric bus is charged by adopting a downward-pressing charging bow. The push-down charging pantograph is usually disposed above the platform, and the pantograph is disposed on the top of the electric bus. When the electric bus needs to be charged, the bus is driven to the position below the charging bow, the charging bow stretches downwards, and the charging bow is in normal lap joint with a pantograph at the top of the bus and then starts to be charged.
However, in the push-down type charging bow charging technology, there are problems that: the charging preparation time is long, and the charging positioning is not accurate enough. As for the long charging preparation time, it takes a long time to embody positioning of the vehicle position, data interaction, and the like, resulting in a long charging time. However, the charging positioning is not accurate enough, which is not favorable for reliable charging.
Disclosure of Invention
The invention aims to provide an electric vehicle charging control method and system, which are used for solving the problems of poor charging rapidity and accuracy of an electric vehicle.
In order to solve the technical problems, the technical scheme of the invention is as follows: an electric vehicle charging control method comprises the following steps:
1) reading electronic tag information of the vehicle by using a radio frequency card reader, wherein the electronic tag information comprises vehicle information and configuration information of short-distance wireless communication;
2) according to the acquired configuration information of the short-distance wireless communication, establishing short-distance wireless communication connection between the vehicle end and the charging pile end, and sending the acquired position information of the pantograph and the position information of the charging pantograph to the vehicle end so as to enable the vehicle to finish parking and positioning;
3) after the vehicle stops in place, wireless network interaction charging information of the vehicle end and the charging pile end is established, the charging bow is driven to move to a position matched with the pantograph, and charging is started.
The invention has the beneficial effects that: the vehicle charging detection method and the vehicle charging detection device have the advantages that the vehicle charging detection is triggered through the radio frequency card reader, so that the vehicle information can be acquired in real time, and a foundation is provided for the establishment of two subsequent communications; the established short-distance wireless communication connection has high sensitivity, strong anti-interference performance and high connection speed, can quickly establish connection, realizes real-time and quick transmission of a small amount of data, and ensures accurate positioning. However, short-distance wireless communication is not suitable for transmitting a large amount of data, so that when the charging bow is controlled, the charging bow needs to be switched to a wireless network in time to establish wireless network connection, and the charging bow can be automatically controlled to ascend and descend according to interaction of data information.
The invention adopts a composite communication means of RFID + micropower communication + WiFi to realize the automatic connection of communication between the vehicle end and the charging pile end, and can quickly and accurately realize the one-to-one charging of the vehicle pantograph and the charging pantograph.
Further, in order to ensure the charging reliability, the method further comprises the steps of obtaining the VIN code of the vehicle through short-distance wireless communication after the vehicle stops in place, judging whether the VIN code of the vehicle is matched with the VIN code stored at the charging pile end, and driving the charging bow to move to the position matched with the pantograph if the VIN code of the vehicle is matched with the VIN code stored at the charging pile end.
Further, the electronic tag information in step 1) further includes configuration information of the wireless network; and establishing wireless network communication connection between the vehicle end and the charging pile end according to the acquired configuration information of the wireless network.
Further, the wireless network connection established between the vehicle end and the charging pile end in the step 3) is as follows: and applying for acquiring the verification information of the wireless network of the joining vehicle through the established short-distance wireless communication connection, and then joining the wireless network of the vehicle according to the acquired verification information.
Further, the wireless network is a wifi network.
The invention also provides an electric vehicle charging control system which comprises a vehicle end and a charging pile end, wherein the vehicle end comprises a vehicle-mounted control unit, a first short-distance wireless communication module and a first wireless network module, and the vehicle-mounted control unit is respectively connected with the first short-distance wireless communication module and the first wireless network module; the charging pile end comprises a charging control unit, a second short-distance wireless communication module, a second wireless network module, a radio frequency card reader and a camera, wherein the charging control unit is respectively connected with the second short-distance wireless communication module, the second wireless network module, the radio frequency card reader and the camera; the vehicle-mounted control unit and the charging control unit run computer programs to realize the following methods:
1) reading electronic tag information of the vehicle by using a radio frequency card reader, wherein the electronic tag information comprises vehicle information and configuration information of short-distance wireless communication;
2) according to the acquired configuration information of the short-distance wireless communication, establishing short-distance wireless communication connection between the vehicle end and the charging pile end, and sending the acquired position information of the pantograph and the position information of the charging pantograph to the vehicle end so as to enable the vehicle to finish parking and positioning;
3) after the vehicle stops in place, wireless network interaction charging information of the vehicle end and the charging pile end is established, the charging bow is driven to move to a position matched with the pantograph, and charging is started.
And further, the method comprises the steps of obtaining the VIN code of the vehicle through short-distance wireless communication after the vehicle is parked in place, judging whether the VIN code of the vehicle is matched with the VIN code stored at the charging pile end, and driving the charging bow to move to the position matched with the pantograph if the VIN code of the vehicle is matched with the VIN code stored at the charging pile end.
Furthermore, the electronic tag information also comprises configuration information of a wireless network, and wireless network communication connection between the vehicle end and the charging pile end is established according to the acquired configuration information of the wireless network.
Further, the wireless network connection established between the vehicle end and the charging pile end in the step 3) is as follows: and applying for acquiring the verification information of the wireless network of the joining vehicle through the established short-distance wireless communication connection, and then joining the wireless network of the vehicle according to the acquired verification information.
Further, the wireless network is a wifi network.
Drawings
FIG. 1 is a block diagram of an electric vehicle charging control system of the present invention;
FIG. 2 is a flow chart of an electric vehicle charging control method of the present invention;
fig. 3 is a schematic position diagram of the pantograph and charging function of the vehicle in the present invention in the process of being in position.
Detailed Description
For purposes of illustrating the objects, aspects and advantages of the present invention in detail, the present invention will be described in further detail with reference to specific embodiments and accompanying drawings.
Embodiment of charging control system of electric vehicle
Taking an electric vehicle charging system as an example, fig. 1 is a structural diagram of a charging control system of an electric passenger car, which includes a car end portion and a charging pile end portion.
The vehicle end part comprises a vehicle-mounted controller unit, a vehicle roof pantograph, a man-machine interaction module, a first short-distance wireless communication module and a first wireless network module. The vehicle-mounted control unit is connected with the roof pantograph, the man-machine interaction module, the first short-distance wireless communication module and the first wireless network module in a control mode.
The man-machine interaction module in the embodiment directly adopts a man-machine interaction interface in a cab at the vehicle end.
The onboard controller in this embodiment performs a control function of the pantograph, such as opening of the pantograph protective cover.
The roof pantograph in the present embodiment, that is, the pantograph provided at the top of the vehicle may be a vehicle bottom pantograph or a side pantograph as another embodiment, and this embodiment is determined based on vehicles of different models.
The charging pile end part comprises a charging control unit, a charging arch controller, a charging arch, a radio frequency card reader, a camera, a second short-distance wireless communication module and a second wireless network module. The charging control unit is respectively connected with the charging bow controller, the radio frequency card reader, the camera, the second short-distance wireless communication module and the second wireless network module in a controlling manner; the charging bow controller is connected with the charging bow in a control mode.
The radio frequency card Reader (RFID) reads a vehicle electronic tag of a radio frequency card in a vehicle in real time and uploads the vehicle electronic tag to the charging control unit, and the charging control unit receives vehicle electronic tag information uploaded by the radio frequency card reader. When the charging control unit receives the vehicle electronic tag information and indicates that the vehicle enters the charging area, the charging control unit controls the second short-distance wireless communication module to be connected with the first short-distance wireless communication module of the vehicle end portion.
The first short-distance wireless communication module, the second short-distance wireless communication module, the first wireless network module and the second wireless network module are two modes for realizing communication between the vehicle end part and the charging pile end part. In a specific embodiment, the first short-distance wireless communication module and the second short-distance wireless communication module both adopt 433MHz micropower communication modules; the first wireless network module and the second wireless network module both adopt WiFi modules.
The two micro-power communication modules are connected when parked in place, and the two WiFi modules are connected after parked in place.
The micropower communication modules of the vehicle end and the charging pile end in the embodiment are 433MHz wireless communication units, and comprise wireless communication modules, antenna modules and microprocessors; the WiFi module comprises a wireless communication module, an antenna module and a microprocessor. The micro-power communication module and the WIFI module are prior art and will not be described here.
The micro-power communication module can also adopt other frequency bands, such as 315MHz, 831MHz, 868MHz and the like.
The electronic tag information comprises vehicle license plate number information and configuration information required by short-distance wireless communication (433MHz), and the configuration information is information enabling the charging pile and the vehicle end to establish micro-power communication connection.
The camera is used for shooting the position information of the pantograph at the top of the vehicle in real time and sending the position information to the charging control unit, and the charging control unit sends the position information of the pantograph of the vehicle to the vehicle-mounted controller through the micropower communication module. The vehicle-mounted controller guides the vehicle to park in place according to the received vehicle position information; the following description of the specific vehicle seating process is provided in conjunction with fig. 2:
when the head of the vehicle enters a charging area, the radio frequency card reader reads vehicle electronic tag information of a radio frequency card in the vehicle and sends the information to the charging control unit, meanwhile, the charging control unit controls to start the camera to continuously shoot the real-time position of a pantograph of the vehicle, image recognition processing is carried out on the pictures, meanwhile, the charging control unit starts a micro-power communication function and establishes micro-power communication connection with the vehicle-mounted control unit.
As shown in fig. 3, the charging control unit sends the position of the center point of the vehicle pole plate (point 1 ', point 2', point 3 ', point 4') shot and the standard position of the center point of the four pole plates of the charging bow (
The position deviation in the above embodiment is a deviation displayed through a human-computer interaction interface, and is a deviation between the parallel range and the up-down range of the vehicle and the marked position; when the deviation is within the allowable set range, the vehicle is considered to enter the pantograph allowed pantograph lowering position of the pantograph, namely the vehicle is in position, and the continuous shooting function of the camera is turned off.
After the vehicle is parked in place, firstly, the charging control unit informs a charging bow controller to realize bow reduction of the charging bow; and secondly, the charging control unit applies for adding a vehicle-mounted WiFi network, establishes connection with a WIFI module of the vehicle-mounted control unit, interacts charging information of the vehicle power battery, and achieves pantograph lowering of a charging pantograph according to the interacted charging information (battery information, charging voltage and current information) to start charging.
The interactive charging information is obtained by acquiring the battery information, the charging voltage and the current information which are acquired by the battery management system in real time through the vehicle-mounted control unit.
The specific way of establishing the WiFi connection is as follows: the charging control unit acquires verification information of a wireless network of the vehicle through the established micropower communication connection, and establishes WiFi wireless network connection, namely, the charging pile end is added into the WiFi network of the vehicle end to perform interaction of related charging information. As other embodiments, the vehicle end may also be added to the wifi network of the charging pile end, and the specific implementation manner is the same as the above manner.
As another implementation, the electronic tag information in this embodiment may further include configuration information of the wireless network, that is, a wireless network name and a password; according to the configuration information of the wireless network read by the RFID, the wireless network communication connection between the vehicle end and the charging pile end can be directly established, and the wireless network communication connection can be realized without the help of micropower communication.
In order to avoid the problem that the charging bow is not matched with the model of the vehicle battery, a verification step can be added before the WiFi network connection is established: the charging control unit also acquires a vehicle VIN code in the vehicle-mounted control unit through the micro-power communication module, the charging control unit judges whether the stored VIN code is matched with the vehicle VIN code information or not, if the VIN code information matched with the charging control unit can be inquired, the charging control unit proves that the charging pile end is matched with the vehicle end in a charging mode, namely the charging control unit and the vehicle-mounted controller establish WiFi connection, and drives the charging bow to descend to a proper position according to interactive information to start charging.
As another embodiment, the vehicle VIN code may also be transmitted through a wifi network after wifi is established, whether the vehicle VIN code is matched with the charging pile end is checked, and if so, the charging bow is controlled to be reduced.
In addition, the vehicle end part of the invention is also provided with a transmitter (not shown in fig. 1) connected with the vehicle-mounted control unit, and the transmitter is used for collecting pressure and temperature information between the positive plate and the negative plate and uploading the pressure and temperature information to the vehicle-mounted control unit, the vehicle-mounted control unit sends the received pressure and temperature information of the positive plate and the negative plate to the charging control unit through the WiFi module, and the charging control unit controls the charging bow controller to carry out lifting adjustment on the charging bow.
Of course, as other embodiments, the transmitter may also be installed at the end of the charging pile to collect pressure and temperature information between the positive and negative plates.
The vehicle charging detection method and the vehicle charging detection device have the advantages that the vehicle charging is triggered and detected through the radio frequency card reader, the vehicle information can be acquired in real time, and a foundation is provided for the establishment of two subsequent communications. The built micropower communication connection has high sensitivity, strong anti-interference performance and high connection speed, can quickly build connection, realizes real-time and quick transmission of a small amount of data and ensures accurate positioning. However, the micropower communication is not suitable for transmitting a large amount of data, so that when the charging bow is controlled, the WiFi module needs to be switched in time to establish WiFi connection, so as to realize data transmission of temperature, pressure, charging voltage and current information and automatically control the charging bow to ascend and descend.
The invention adopts a composite communication means of RFID + micropower communication + WiFi to realize the automatic connection of communication between the vehicle end and the charging pile end, and can quickly and accurately realize the one-to-one charging of the vehicle pantograph and the charging pantograph.
In addition, the pole plate connection process of the charging bow and the pantograph in the embodiment sequentially comprises the following steps: PE plate-Tg + DC +, DC-CP. The disconnection process of the charging bow polar plate and the pantograph polar plate is as follows in sequence: the CP pole plate, Tg + DC + and Tg & gt PE can be known from the lower graph, the PE pole plate and the CP pole plate are in the diagonal positions, and the CP + and the CP-are in the diagonal positions, and an intelligent lifting bow of the charging bow movement mechanism is realized by adopting an asymmetric flexible connection scheme and a sensor pose correction control scheme.
The polar plate adopts the biax structural style, and the back of taking one's place parks, but four polar plate positions of automatic adjustment realize being connected with on-vehicle pantograph polar plate accuracy, and self-adaptation ability is strong, and the polar plate adopts "D" type structural design, adopts the flexible electrical connection scheme of dot matrix to the spring touches the finger and as the current-carrying conductor, has improved the electrical connection reliability of interface greatly.
Embodiment of charging control method for electric vehicle
The invention provides a charging control method of an electric vehicle, which comprises the following steps:
1) reading electronic tag information of the vehicle by using a radio frequency card reader, wherein the electronic tag information comprises vehicle information and configuration information of short-distance wireless communication;
2) according to the acquired configuration information of the short-distance wireless communication, establishing short-distance wireless communication connection between the vehicle end and the charging pile end, and sending the acquired position information of the pantograph and the position information of the charging pantograph to the vehicle end so as to enable the vehicle to finish parking and positioning;
3) after the vehicle stops in place, the charging is started by establishing wireless network interactive charging information of the vehicle end and the charging pile end.
The specific implementation process of the electric vehicle charging control method is described in detail in the electric vehicle charging control system, and is not described herein again.
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