WO2024056003A1

WO2024056003A1 - Highway wireless electric energy transmission system and control method therefor

Info

Publication number: WO2024056003A1
Application number: PCT/CN2023/118637
Authority: WO
Inventors: 张江健
Original assignee: 东莞市幻影创新科技有限公司
Priority date: 2022-09-15
Filing date: 2023-09-13
Publication date: 2024-03-21
Also published as: CN117818398A

Abstract

Disclosed are a highway wireless electric energy transmission system and a control method therefor, the system comprising an overhead catenary system, a sliding rail, a power supply vehicle, a wireless electric energy transmitting apparatus, a wireless electric energy receiving apparatus, an adjusting apparatus and a remote scheduling center. The overhead catenary system is electrically connected to an external power supply grid via wires. The power supply vehicle comprises a power receiver, a pulley and a power supply positioning communication module. The power receiver acquires electric energy by means of sliding contact with the overhead catenary system and supplies the electric energy to the power supply vehicle and the wireless electric energy transmitting apparatus for use thereby, and the power supply vehicle runs on the sliding rail by means of the pulley. The wireless electric energy receiving apparatus is mounted on an electric vehicle, and acquires the electric energy from the wireless electric energy transmitting apparatus by means of magnetic field coupling. By means of the present invention, electric vehicles can acquire electric energy in a more stable and safer manner, the maintenance is simple, and the costs are low.

Description

A highway wireless power transmission system and its control method

Technical Field

The invention belongs to the technical field of wireless power transmission control and relates to a highway wireless power transmission system and a control method thereof.

Background technique

With the frequent occurrence of extreme weather such as high temperatures and droughts caused by global warming, governments around the world are increasing their efforts to reduce carbon emissions in the environment. Replacing traditional fuel vehicles with electric vehicles is an important way to reduce carbon emissions in the transportation sector. However, due to the many technical bottlenecks of power batteries that are difficult to break through, problems such as insufficient endurance of electric vehicles, severe battery attenuation in low-temperature environments, and the high cost of lithium batteries have become extremely prominent. Especially in the field of commercial vehicles, which accounts for the largest proportion of carbon emissions in the transportation sector, it is difficult to produce pure electric heavy-duty trucks with large cargo capacity, strong endurance and cost advantages with the existing battery technology level, which greatly increases the traffic pressure. areas to reduce carbon emissions.

In order to reduce dependence on batteries and improve the overall performance of electric vehicles, some research institutions and companies have tried to adopt technical solutions for electrified highways. For example, in 2017, Siemens laid an electrified highway "eHighway" with a total length of about 10 kilometers on the A5 federal highway in Germany. According to Siemens's design plan, a liftable smart pantograph is installed on the top of the heavy truck. At the same time, combined with the vehicle's hybrid system, when the heavy truck When the truck is driving on the electrified highway, it can obtain electric energy through the pantograph and contact network connection. The maximum vehicle speed it can withstand is 90 kilometers per hour.

technical problem

In the existing technology, electrified highways usually use an overhead catenary similar to the high-speed rail power supply system. A pantograph is installed on the top of a heavy-duty electric vehicle, and electric energy is obtained through direct contact and sliding between the carbon slide of the pantograph and the catenary. As electric vehicles drive on the road, they are affected by many factors such as the ups and downs of the road surface and the vibration of the goods they carry. The body of the electric vehicle is prone to large up and down vibrations, which can lead to a gap between the pantograph installed on the roof and the contact grid. The pressure is sometimes high and sometimes low, which can easily cause the pantograph to frequently disconnect from the contact network. What's more, if the pantograph fails and cannot be recovered normally when a heavy-duty electric vehicle changes lanes, it may collapse the overhead contact network and cause serious electric shock accidents and traffic accidents. Traditional electrified highway technical solutions will not only affect the stability and safety of electric vehicles obtaining electric energy, but the frequent disconnection of the pantograph from the catenary will also accelerate the wear of the carbon slides on the catenary and pantograph, ultimately significantly increasing the equipment maintenance of electrified highways. The cost and usage cost are not conducive to the promotion and application of electrified highways.

Technical solutions

In order to overcome the shortcomings of the existing technology, the present invention discloses a highway wireless power transmission system and a control method thereof, so as to achieve the purpose of obtaining electric energy from the outside during the driving of an electric vehicle more stably and safely, with simple equipment maintenance and repair, and with lower cost. . In order to achieve the above object, the technical solution adopted by the present invention is: a highway wireless power transmission system, including a catenary, a taxiway, a power supply vehicle, a wireless power transmitting device, a wireless power receiving device, a regulating device, and a remote dispatch center.

The contact network is electrically connected to the external power supply grid through wires. The power supply vehicle includes a receiver, a pulley and a power supply positioning communication module. The receiver obtains electric energy through sliding contact with the contact network and supplies it to the power supply vehicle and the power supply vehicle. The wireless power transmitting device is used, and the power supply vehicle runs on the sliding track through the pulley.

The wireless power transmitting device includes a wireless power transmitting coil and a control transmitting circuit. The wireless power transmitting device is mechanically connected to the adjusting device and is controlled by the adjusting device to move up and down and left and right. The wireless power transmitting device is connected to the The power supply positioning communication module and the power receiver are electrically connected.

The remote dispatch center establishes a communication connection with the power supply vehicle and the wireless power receiving device through a wireless network to process, receive and send data.

The wireless power receiving device includes a wireless power receiving coil, a vehicle positioning communication module, an alignment detection module and a charging module. The wireless power receiving device is installed on the roof of an electric vehicle and obtains from the wireless power transmitting device through magnetic field coupling. electrical energy.

Both the vehicle-mounted positioning communication module and the power supply positioning communication module include a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope.

The alignment detection module includes a Hall sensor and a detection controller. The Hall sensor converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal and transmits it to The detection controller.

The adjusting device includes a telescopic rod, an adjusting base, an adjusting motor and a motor control circuit. The adjusting base is installed at the bottom of the power supply vehicle. The top of the telescopic rod is mechanically connected to the adjusting base. The bottom of the telescopic rod The wireless power transmitting device is mechanically connected to the wireless power transmitting device; the wireless power transmitting device moves up and down through the telescopic rod, and the wireless power transmitting device moves left and right through the adjusting base.

The wireless power transmitting device further includes a laser ranging module, which measures the vertical distance between the wireless power transmitting device and the wireless power receiving device by emitting laser signals.

A control method for a highway wireless power transmission system, including the following steps: S1. The charging module on the electric vehicle determines whether the power battery needs to be charged. When charging is required, it sends charging request information to the remote dispatch center and at the same time sends the account ID information. and location information are sent to the remote dispatch center, which compares and verifies the received charging request information.

S2. If the charging request information is verified, the remote dispatch center sends a charging task scheduling signal to the power supply vehicle, and the power supply vehicle waits for charging and docking with the electric vehicle behind it according to the dispatch signal.

S3. By monitoring satellite positioning data, it is found that when the power supply vehicle and the electric vehicle are about to approach, the wireless energy transmitting coil of the power supply vehicle generates an alternating magnetic field of a certain frequency, and at the same time, the wireless energy receiving coil on the electric vehicle resonates at the same frequency.

S4. The Hall sensor converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal and transmits it to the detection controller. The motor control circuit controls the adjustment device to move the wireless power transmitting device up and down and left and right. , at the same time, the power supply vehicle also adjusts its own running speed and acceleration so that the wireless power transmitting device is aligned with the wireless power receiving device on the roof of the moving electric vehicle.

S5. When the alignment is accurate, the speed and acceleration of the power supply vehicle and the electric vehicle are consistent, so that the power supply vehicle and the electric vehicle can move forward synchronously. The wireless power receiving coil obtains electric energy through magnetic field coupling to charge the power battery.

S6. When the battery is fully charged or the electric vehicle has left the charging area, the electric vehicle sends a charging termination request message to the power supply vehicle and the remote dispatch center at the same time. The remote dispatch center deducts the corresponding charging fee, the power supply vehicle terminates and generates an alternating magnetic field, and the power supply vehicle waits. Carry out the next charging task.

beneficial effects

The present invention is a technical solution for highway wireless power transmission with stable power supply, good safety, low cost, and simple maintenance. Specifically, the present invention uses a wireless power receiving device installed on the roof of an electric vehicle and a device that can be installed from The wireless power transmitting device on the power supply vehicle that obtains electric energy from the external contact network keeps moving synchronously. Through magnetic field coupling, the electric vehicle can obtain external electric energy stably and safely during driving.

Since the pantograph is no longer installed on the roof of the electric vehicle, but the pantograph is installed on the power supply vehicle on the sliding track on the roadside, the vibration of the power supply vehicle is small during the movement, and the pantograph and contact grid are evenly stressed. With frequent disengagement, the power supply vehicle will obtain power from the contact network through the pantograph more stably, and the pantograph's carbon slide will wear less, thereby reducing equipment maintenance workload and cost.

Description of drawings

Figure 1 is a schematic side view of the highway wireless power transmission system.

Figure 2 is a schematic top view of the highway wireless power transmission system.

Figure 3 is a schematic structural diagram of the power supply vehicle and the regulating device.

Figure 4 is a flow chart of the control method.

The list of reference symbols is as follows:

01. Taxiing track; 02. Power supply vehicle; 03. Wireless power transmitting device; 04. Wireless power receiving device; 05. Catenary;

011. Receiver; 012. Telescopic rod; 013. Adjustment base; 014. Hall sensor; 015. Laser ranging module;

021. Driving pulley; 022. Driven pulley;

Embodiments of the invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to Figures 1, 2, and 3, a highway wireless power transmission system of the present invention includes a catenary 05, a sliding track 01, a power supply vehicle 02, a wireless power transmitting device 03, a wireless power receiving device 04, and a regulating device. Device, remote dispatch center.

The taxi track 01 and the catenary 05 are suspended above the road through metal column brackets installed on the side of the road. The vertical distance between the taxi track 01 and the catenary 05 and the road surface should be no less than 5 meters, and the installation height is about 0.5 meters higher than the road height limit. More appropriate. The taxi track 01 and the catenary 05 can be set up above the leftmost lane of the road or above the rightmost lane of the road, but the taxi track 01 needs to form a circular track so that the power supply vehicle 02 can be on the taxi track 01 Round trip operation. The shape of the sliding track 01 includes rectangular circular track and elliptical circular track.

The catenary 05 includes several power transmission wires, and the power transmission wires are electrically connected to the external power supply grid. The taxi track 01 should be set up on straight sections of urban roads and highways with wide visibility, and should be avoided in tunnels, viaducts, ramps and curved sections. In order to facilitate the dispatch of power supply vehicle 02 and the maintenance of taxi track 01, taxi track 01 should be installed in sections at certain distances. For example, the longest section of a highway should not exceed 5 kilometers, and the longest section of an urban road should not exceed 2 kilometers.

The power supply vehicle 02 includes a receiver 011, a pulley and a power supply positioning communication module. The receiver 011 obtains electric energy through sliding contact with the contact network 05, and the obtained electric energy is then supplied to the power supply vehicle 02, the regulating device and the wireless energy transmitting device 03.

The pulley includes a drive control circuit, a drive motor, a drive pulley 021 and a driven pulley 022. It is preferred to use a DC brushless hub motor that integrates the drive motor and the drive pulley 021. Combined with the driven pulley 022, the drive control circuit drives the power supply car 02 on the sliding track 01 run on. The driving pulley 021 and the driven pulley 022 jointly clamp the sliding track 01 to prevent the power supply vehicle 02 from derailing during operation.

The power supply positioning communication module of the power supply vehicle 02 includes a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope, which can obtain the real-time position information, speed and acceleration information of the power supply vehicle 02. The on-board positioning communication module on electric vehicles also includes satellite positioning modules, wireless communication modules, accelerometers and gyroscopes, which can obtain real-time position information, speed and acceleration information of electric vehicles. The satellite positioning module supports American GPS or China Beidou navigation. In order to improve positioning accuracy, real-time dynamic differential technology (RTK) can also be used. The current RTK positioning technology can achieve real-time global centimeter-level positioning accuracy, which is suitable for power supply vehicles 02 and electric vehicles. Aligning the transmitter and receiver coils while driving helps a lot. The wireless communication module can use LoRa, NB-IoT, 4G or 5G wireless communication network. The main function of the wireless communication module is to realize data interconnection between the vehicle positioning communication module, the power supply positioning communication module and the remote dispatch center.

The adjustment device includes a telescopic rod 012, an adjusting base 013, an adjusting motor and a motor control circuit. The adjusting base 013 is installed at the bottom of the power supply vehicle 02. The top end of the telescopic rod 012 is mechanically connected to the adjusting base 013. The bottom end of the telescopic rod 012 is connected to the wireless energy transmitter. The device 03 is mechanically connected; the wireless power transmitting device 03 can move up and down through the telescopic rod 012, and the wireless power transmitting device 03 can move left and right through the adjusting base 013.

The wireless power transmitting device 03 includes a wireless power transmitting coil and a control transmitting circuit. The wireless power transmitting device 03 is connected to the power supply positioning communication module and the receiver 011. The wireless power transmitting device 03 is installed on the surface of the power supply vehicle 02. The wireless power receiving device 04 includes a wireless power receiving coil, a vehicle positioning communication module, an alignment detection module and a charging module. Both the wireless power transmitting device 03 and the wireless power receiving device 04 have plastic protective shells, which are waterproof and dustproof.

The wireless power transmitting device 03 also includes a laser ranging module 015. The laser ranging module 015 measures the vertical distance between the wireless power transmitting device 03 and the wireless power receiving device 04 by emitting laser signals. When the wireless power transmitting device 03 and the wireless power receiving device 04 are aligned, the motor control circuit controls the telescopic rod 012 to move up and down by adjusting the motor to adjust the vertical distance between the wireless power transmitting coil and the wireless power receiving coil, for example, the distance is within 20 cm. , usually the wireless power transmission efficiency of the wireless power transmitting coil and the receiving coil is lower as the distance is farther, and higher as the distance is closer.

The wireless power receiving device 04 obtains electric energy from the wireless power transmitting device 03 through a magnetic field coupling method, which includes electromagnetic induction type and magnetic field resonance type. The electromagnetic induction type is that the wireless power transmitting coil on the wireless power transmitting device 03 passes alternating current of a certain frequency to generate a magnetic field around the transmitting coil. Correspondingly, a correspondingly changing induced electromotive force is generated in the wireless power receiving coil of the wireless power receiving device 04 , thereby realizing wireless transmission of electric energy, and then charging electric vehicles through energy conversion.

The magnetic field resonance method is to supply alternating current to the wireless power transmitting coil and adjust it and the wireless power receiving coil to the same frequency, so that the two generate magnetic field resonance at a specific frequency, and the wireless power receiving coil can receive the wireless power transmitting coil. The emitted energy can be used to wirelessly charge electric vehicles through energy conversion. It is preferred to use the magnetic field coupling method of magnetic resonance to obtain better wireless power transmission efficiency over longer distances.

The wireless power receiving device 04 also includes an alignment detection module. The alignment detection module specifically includes a Hall sensor 014 and a detection controller. Hall sensor 014 is a magnetic field sensor based on the Hall effect. The Hall sensor 014 is disposed on the surface of the protective shell of the wireless power receiving device 04, so that when the wireless power transmitting coil and the wireless power receiving coil are closely aligned, the Hall sensor 014 is just between the wireless power transmitting coil and the wireless power receiving coil. Before the wireless power transmitting coil is aligned, it must conduct alternating current to generate a magnetic field. The Hall sensor 014 converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal. For example, the stronger the magnetic field, the voltage The higher it is, the weaker the magnetic field and the lower the voltage. The Hall sensor 014 transmits the detected electrical signal to the detection controller. The detection controller determines the magnetic field strength between the transmitting coil and the receiving coil based on the electrical signal, thereby determining whether the wireless power transmitting coil and the wireless power receiving coil are aligned. Bit accurate.

Specifically, the electrical signal value corresponding to the magnetic field intensity after accurate alignment between the transmitting coil and the receiving coil can be input into the detection controller in advance as a critical value. In the initial situation, when the Hall sensor 014 detects a deviation in the alignment of the transmitting coil and the receiving coil, the power supply vehicle 02 continuously adjusts its own speed and acceleration based on the real-time position information, speed and acceleration information of the electric vehicle received by the power supply positioning communication module. , thereby adjusting the relative positions of the transmitting coil and the receiving coil. When the Hall sensor 014 detects that the electrical signal value corresponding to the magnetic field strength reaches or approaches the above-mentioned critical value, the transmitting coil and the receiving coil reach the best matching state at this time, and the wireless energy transmission efficiency is the highest. After the detection controller determines that the alignment is accurate based on the electrical signal value, the detection controller sends the accurate alignment signal and the real-time driving parameters of the electric vehicle to the power supply positioning communication module through the vehicle positioning communication module, and the power supply vehicle 02 receives it according to the power supply positioning communication module. By controlling the motor speed and adjusting its own running speed and acceleration to the speed and acceleration of the electric vehicle, the power supply vehicle 02 and the electric vehicle can run synchronously.

If after the alignment is accurate, the power supply vehicle 02 and the electric vehicle keep running synchronously for a period of time, and there is a large deviation in the alignment of the transmitting coil and the receiving coil due to sudden sudden acceleration or emergency braking of the electric vehicle, then the power supply vehicle 02 can According to the real-time position information, speed and acceleration information of the electric vehicle received by the power supply positioning communication module, it continuously adjusts its own speed and acceleration, thereby adjusting the relative positions of the transmitting coil and the receiving coil, and then re-performs the alignment detection, so that the power supply vehicle 02 and Electric cars keep pace again.

The charging module in the wireless power receiving device 04 can obtain electric vehicle charging parameter information, including battery power information, charging voltage parameters, charging current parameters, charging account ID information, etc. The vehicle positioning communication module in the wireless energy receiving device 04 is equipped with a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope, which can obtain the real-time position information, speed information and acceleration information of the electric vehicle, and combine this information with the electric vehicle Charging parameter information is transmitted to the power supply positioning communication module through the wireless communication network.

The remote dispatch center establishes communication connections with the power supply vehicle 02 and the wireless power receiving device 04 through the wireless communication network, and can process, receive and send data. The main function of the remote dispatch center is to process the charging requests and system billing of electric vehicles, and can remotely dispatch different power supply vehicles 02 according to the charging requests of multiple electric vehicles to reasonably allocate charging tasks.

The specific working process of a highway wireless power transmission system of the present invention is as follows:

When an electric vehicle equipped with a vehicle-mounted positioning communication module is about to enter the wireless charging lane where taxiing track 01 has been deployed, the charging module on the electric vehicle automatically obtains the electric vehicle charging parameter information. If the remaining power SOC of the power battery is lower than 80%, then The charging module automatically sends charging request information to the remote dispatching center via the wireless communication network through the vehicle positioning communication module. The charging request information includes battery power information, charging voltage parameters, charging current parameters, charging account ID information, etc. The remote dispatching center reads the server's pre-set information. The stored charging account ID information of all registered electric vehicles is compared and verified.

If the verification fails, the remote dispatch center returns the "reject charging request" message to the electric vehicle's on-board positioning communication module; if the verification passes, it returns the "accept charging request" message to the electric vehicle. From this point on, the electric vehicle The car's on-board positioning communication module continuously sends the real-time driving parameters of the electric vehicle to the power supply positioning communication module every 500 milliseconds, including real-time location information, vehicle speed information and acceleration information.

The remote dispatch center sends a charging task scheduling signal to an idle power supply vehicle 02 at the front of the track through the wireless communication network. The power supply vehicle 02 moves along the taxiing track 01 according to the real-time driving parameters of the electric vehicle that has passed the charging request verification. Accelerate forward and run to the front of the electric car.

Through satellite positioning data, when the electric vehicle behind gradually approaches the power supply vehicle 02 in front, and the straight-line distance between the two is less than 5 meters, the control circuit of the wireless power transmitting device 03 of the power supply vehicle 02 causes the wireless power transmitting coil to generate an 85kHz frequency The alternating magnetic field, while the wireless power receiving coil on the electric vehicle also resonates at the 85kHz frequency. At this time, the Hall sensor 014 installed on the surface of the protective shell of the wireless power receiving device 04 on the electric vehicle converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal and transmits it to the detection controller. The detection controller determines whether the wireless power transmitting coil and the wireless power receiving coil are accurately aligned according to the internal preset electrical signal threshold value. At the same time, the power supply vehicle 02 also adjusts its running speed and acceleration so that the wireless power transmitting device 03 is aligned with the wireless power receiving device 04 on the roof of the moving electric vehicle.

When the alignment is accurate, the detection controller sends the accurate alignment signal and the real-time driving parameters of the electric vehicle to the power supply positioning communication module through the vehicle positioning communication module. The power supply vehicle 02 adjusts its own running speed and acceleration to the electric vehicle by controlling the motor speed. The speed and acceleration are consistent, so as to keep moving forward in sync with the electric vehicle. When the power supply vehicle 02 keeps running synchronously with the electric vehicle, the electric vehicle can use the wireless power receiving coil to receive the most efficient energy from the wireless power transmitting coil through magnetic field coupling. The obtained energy is then converted into AC and DC energy and then given to the electric vehicle. Power battery charging.

When the battery is fully charged or the electric vehicle has left the track charging area, the charging module on the electric vehicle simultaneously sends a charging termination request message to the power supply vehicle 02 and the remote dispatch center through the on-board positioning communication module. The remote dispatch center obtains the information from the charging account corresponding to the electric vehicle. The corresponding charging fee will be deducted from the ID. After receiving the charging termination request information, the power supply vehicle 02 terminates the electric energy output of the wireless power transmitting coil, and at the same time continues to run along the taxiing track 01 to wait for the next charging task.

Figure 4 is a flow chart of a control method of a highway wireless power transmission system of the present invention. As shown in Figure 4 and Figure 1, the method includes the following steps:

S1. Determine charging needs and send charging request

When an electric vehicle equipped with a vehicle-mounted positioning communication module is about to enter the wireless charging lane where taxiing track 01 has been deployed, the charging module on the electric vehicle determines whether the power battery needs to be charged. When charging is required, it sends a charging request to the remote dispatch center. information, and simultaneously sends the account ID information and location information to the remote dispatch center.

S2. Remote dispatch center verifies charging request

The remote dispatch center reads the registered charging account ID information of all electric vehicles pre-stored by the server for comparison and verification. If the verification fails, the remote dispatch center returns the "rejection of charging request" message to the power supply positioning communication module of the electric vehicle; if the charging request information passes the verification, the remote dispatch center sends a 02 execution charging task scheduling signal to the power supply vehicle. .

S3. The power supply vehicle is waiting for charging and docking with the electric vehicle.

An idle power supply vehicle 02 at the front of the taxiing track 01 is waiting for the electric vehicle to charge and dock according to the dispatch signal. By monitoring satellite positioning data, it is found that when the power supply vehicle 02 and the electric vehicle are about to approach, the wireless power transmitting coil of the power supply vehicle 02 generates a certain amount of energy. frequency of the alternating magnetic field, while the wireless power receiving coil on the electric vehicle resonates at the same frequency.

S4. Align the transmitting coil and the receiving coil.

Hall sensor 014 converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal and transmits it to the detection controller. The detection controller determines the wireless energy emission according to the internal preset electrical signal threshold value. Check whether the coil and the wireless power receiving coil are accurately aligned. At the same time, the power supply vehicle 02 also adjusts its own running speed and acceleration so that the wireless power transmitting device 03 is aligned with the wireless power receiving device 04.

S5, wireless charging while driving simultaneously

When the alignment is accurate, the speed and acceleration of the power supply vehicle 02 is consistent with that of the electric vehicle, so that it can move forward in synchronization with the electric vehicle. The wireless power receiving coil obtains electric energy through magnetic field coupling to charge the power battery.

S6. Terminate charging and charge

When the battery is fully charged or the electric vehicle has left the charging area, the electric vehicle sends a charging termination request message to the remote dispatch center. The remote dispatch center deducts the corresponding charging fee. The power supply vehicle 02 stops generating the alternating magnetic field, and the power supply vehicle 02 waits for the next execution. Charging tasks.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention and are not used to limit the invention. As long as they are within the scope of the essential spirit of the present invention, appropriate changes can be made to the above embodiments. and changes all fall within the scope of protection claimed by the present invention.

Claims

A highway wireless power transmission system, characterized by: including a catenary, a taxiing track, a power supply vehicle, a wireless power transmitting device, a wireless power receiving device, a regulating device, and a remote dispatch center; the catenary is electrically connected to an external power supply grid through wires The power supply vehicle includes a power receiver, a pulley and a power supply positioning communication module. The power receiver obtains electric energy through sliding contact with the contact network and supplies it to the power supply vehicle and the wireless energy transmitting device. The power supply vehicle Running on the sliding track through the pulley; the wireless power transmitting device includes a wireless power transmitting coil and a control transmitting circuit. The wireless power transmitting device is mechanically connected to the adjusting device and is controlled up and down by the adjusting device. Moving left and right, the wireless power transmitting device is electrically connected to the power supply positioning communication module and the receiver; the remote dispatch center establishes communication connections with the power supply vehicle and the wireless power receiving device through the wireless communication network, and processes , receive and send data.
A highway wireless power transmission system according to claim 1, characterized in that: the wireless power receiving device includes a wireless power receiving coil, a vehicle positioning communication module, an alignment detection module and a charging module. It is installed on the roof of an electric vehicle and obtains electric energy from the wireless power transmitting device through magnetic field coupling.
A highway wireless power transmission system according to claim 2, characterized in that: the vehicle-mounted positioning communication module and the power supply positioning communication module both include a satellite positioning module, a wireless communication module, an accelerometer and a gyroscope.
A highway wireless power transmission system according to claim 2, characterized in that: the alignment detection module includes a Hall sensor and a detection controller, and the Hall sensor detects the wireless power transmission coil by The magnetic field strength signal between the wireless power receiving coil and the wireless power receiving coil is converted into an electrical signal and transmitted to the detection controller.
A highway wireless power transmission system according to claim 1, characterized in that: the adjustment device includes a telescopic rod, an adjustment base, an adjustment motor and a motor control circuit, and the adjustment base is installed at the bottom of the power supply vehicle. The top end of the telescopic rod is mechanically connected to the adjustment base, and the bottom end of the telescopic rod is mechanically connected to the wireless power transmitting device; the wireless power transmitting device moves up and down through the telescopic rod, and the wireless power transmitting device Move left and right by adjusting the base.
A highway wireless power transmission system according to claim 1, characterized in that: the wireless power transmitting device further includes a laser ranging module, and the laser ranging module measures the distance between the wireless power transmitting device and the wireless power transmitting device by emitting a laser signal. The vertical distance of the wireless power receiving device.
A control method for a highway wireless power transmission system according to claim 1, characterized in that it includes the following steps:

S1. The charging module on the electric vehicle determines whether the power battery needs to be charged. When charging is required, it sends charging request information to the remote dispatch center, and at the same time sends the account ID information and location information to the remote dispatch center. The remote dispatch center responds to the received The charging request information is compared and verified;

S2. If the charging request information is verified, the remote dispatch center sends a charging task scheduling signal to the power supply vehicle, and the power supply vehicle waits for charging and docking with the electric vehicle behind according to the dispatch signal;

S3. By monitoring satellite positioning data, it is found that when the power supply vehicle and the electric vehicle are about to approach, the wireless energy transmitting coil of the power supply vehicle generates an alternating magnetic field of a certain frequency, and at the same time, the wireless energy receiving coil on the electric vehicle resonates at the same frequency;

S4. The Hall sensor converts the detected magnetic field strength signal between the wireless power transmitting coil and the wireless power receiving coil into an electrical signal and transmits it to the detection controller. The motor control circuit controls the adjustment device to move the wireless power transmitting device up and down and left and right. , at the same time, the power supply vehicle also adjusts its own running speed and acceleration so that the wireless power transmitting device is aligned with the wireless power receiving device on the roof of the moving electric vehicle;

S5. When the alignment is accurate, the speed and acceleration of the power supply vehicle and the electric vehicle are consistent, so that the power supply vehicle and the electric vehicle can move forward synchronously. The wireless power receiving coil obtains electric energy through magnetic field coupling to charge the power battery;

S6. When the battery is fully charged or the electric vehicle has left the charging area, the electric vehicle sends a charging termination request message to the power supply vehicle and the remote dispatch center at the same time. The remote dispatch center deducts the corresponding charging fee, the power supply vehicle terminates and generates an alternating magnetic field, and the power supply vehicle waits. Carry out the next charging task.