Mobile electric vehicle wireless charging method and system and electric vehicle

Abstract

The invention discloses a mobile electric vehicle wireless charging method and system and an electric vehicle, and relates to the field of wireless electric energy transmission, and the method comprises the steps: receiving charging request signals of a plurality of electric vehicles, putting the plurality of electric vehicles into a charging queue, and when the charging queue is arranged to the current electric vehicle, sending the charging request signals to the current electric vehicle; and sending a charging instruction to the ground equipment, charging the current electric vehicle through the ground equipment, removing the current electric vehicle from the charging queue when the charging of the current electric vehicle is completed, and returning to the step of arranging the charging queue to the current electric vehicle until all the electric vehicles in the charging queue are completely charged. Compared with the prior art that a wall-mounted end and a ground end are fixed on a fixed parking space, and wireless charging can be started only after the vehicles are parked at the parking space and aligned, the cloud management platform realizes ordered charging of a plurality of vehicles through a single ground end device, and does not need high-precision parking at the vehicle end; and the cost of the wireless charging system is reduced.

Description

Technical Field

[0001] The present application relates to the field of wireless power transmission technology, and in particular to a method and system for wireless charging of a mobile electric vehicle and an electric vehicle. Background Art

[0002] The traditional electric vehicle wireless charging system, that is, the wall-mounted end and the ground end are fixed in a fixed parking space. The vehicle needs to be parked in the parking space and aligned before wireless charging can be started.

[0003] As the industry is just starting out, the small scale leads to high costs for system components, especially the ground-end equipment of the wireless charging system is several times more expensive than the traditional wired / conductive charging. Since there are many power conversion links in the system, and the application links are complex, there are many uncertain factors in the working conditions, and the average efficiency of the system can still be optimized. The construction and promotion of ground-end equipment are limited, and there are certain promotion bottlenecks in power distribution, parking space layout, etc. The wireless charging system requires the vehicle to park accurately, which is within the allowable charging range. The range is small, and it is difficult for both manual and automatic driving vehicles to park accurately at one time. Wireless charging uses high-frequency alternating magnetic fields for wireless energy transmission. In order to ensure the safety of the electromagnetic environment, the traditional wireless charging method needs to add foreign object detection functions, which greatly increases the complexity and cost of the equipment. In addition, the foreign object detection function has certain detection blind spots and detection accuracy, and it is difficult to avoid all electromagnetic environment safety risks under 100% working conditions. Summary of the invention

[0004] The main purpose of the present application is to provide a mobile electric vehicle wireless charging method, system and electric vehicle, aiming to solve the technical problem that a single ground-end device can charge multiple vehicles.

[0005] To achieve the above objectives, the present application provides a mobile electric vehicle wireless charging method, the mobile electric vehicle wireless charging method comprising:

[0006] receiving charging request signals from a plurality of electric vehicles, and placing the plurality of electric vehicles into a charging queue;

[0007] When the current electric vehicle is in the charging queue, a charging instruction is sent to the ground device, and the current electric vehicle is charged through the ground device;

[0008] When the current electric vehicle is fully charged, the current electric vehicle is removed from the charging queue;

[0009] Return to the step when the current electric vehicle is in the charging queue until all electric vehicles in the charging queue have completed charging.

[0010] Optionally, after the step of sending a charging instruction to the ground equipment when the current electric vehicle is in the charging queue, and charging the current electric vehicle through the ground equipment, the method further includes:

[0011] When the current electric vehicle is not in the charging queue and a charging termination signal of the current electric vehicle is received, the current electric vehicle is removed from the charging queue.

[0012] In addition, to achieve the above-mentioned purpose, the present application also proposes a mobile electric vehicle wireless charging system, the mobile electric vehicle wireless charging system comprising: a cloud management platform and ground equipment;

[0013] The ground equipment is connected to the cloud management platform;

[0014] The cloud management platform is used to receive charging request signals and location signals of multiple electric vehicles, and put the multiple electric vehicles into a charging queue;

[0015] The cloud management platform is also used to send charging instructions and location signals to ground equipment when the current electric vehicle is in the charging queue;

[0016] The ground device is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle upon receiving a charging instruction;

[0017] The ground device is also used to stop charging the current electric vehicle and send a stop signal to the cloud management platform when it is detected that the current electric vehicle is fully charged;

[0018] The cloud management platform is also used to remove the current electric vehicle from the charging queue when a stop signal is received.

[0019] Optionally, the ground equipment includes: a primary side device and a power component;

[0020] The primary side device is connected to the power component;

[0021] The power component is used to send a second current signal to the primary side device when receiving the first current signal from the power supply device;

[0022] The primary side device is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle when receiving the second current signal.

[0023] Optionally, the ground device is used to send a handshake signal to the current electric vehicle when receiving a charging instruction;

[0024] The ground device is also used to complete the communication handshake when receiving the handshake success signal fed back by the current electric vehicle.

[0025] Optionally, the ground device is further used to send a compatible signal to the current electric vehicle when the communication handshake is completed;

[0026] The ground equipment is also used to complete compatibility detection when receiving a compatible passing signal of the current electric vehicle.

[0027] Optionally, the ground equipment further comprises: a transport trolley;

[0028] The transport trolley comprises: a controllable fork rod;

[0029] The transport trolley is connected to the primary side equipment and the power assembly respectively, and the controllable fork rod is connected to the transport trolley and the primary side equipment;

[0030] The transport trolley is used to navigate to the location of the current electric car when receiving the charging instruction and the location signal, and move the ground device to the bottom of the current electric car through the controllable fork rod so that the ground device can charge the current electric car.

[0031] Optionally, the transport trolley is further used to control the controllable fork rod to remove foreign matter from the surface when the ground equipment completes the compatibility test;

[0032] The transport trolley is also used to control the controllable fork rod to extend and send a positioning signal to the ground equipment when the foreign matter on the surface of the controllable fork rod is removed;

[0033] The ground equipment is also used to start mutual inductance detection when receiving the in-position signal.

[0034] Optionally, the transport trolley is further used to send a charging start signal to the ground equipment when mutual inductance detection is completed;

[0035] The ground equipment is also used to charge the electric vehicle when a charging start signal is received.

[0036] In addition, to achieve the above-mentioned purpose, the present application also proposes an electric vehicle, which includes the movable electric vehicle wireless charging system as described above.

[0037] One or more technical solutions proposed in this application have at least the following effects:

[0038] In this application, the cloud management platform receives charging request signals from multiple electric vehicles, and puts the multiple electric vehicles into a charging queue. When the current electric vehicle is in the charging queue, a charging instruction is sent to the ground device, and the current electric vehicle is charged through the ground device. When the current electric vehicle is fully charged, the current electric vehicle is removed from the charging queue, and the steps when the current electric vehicle is in the charging queue are returned until all electric vehicles in the charging queue are fully charged. Compared with the prior art in which the wall-mounted terminal and the ground terminal are fixed on a fixed parking space, and the vehicle needs to be parked in the parking space and aligned before wireless charging can be started, this application uses a cloud management platform to realize orderly charging of multiple vehicles by a single ground terminal device, and does not require the vehicle to perform high-precision parking, thereby reducing the cost of the wireless charging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0040] Figure 1 This is a block diagram of the architecture of the mobile wireless charging system of this application;

[0041] Figure 2 This is the electrical connection diagram of the portable wireless charging system of this application;

[0042] Figure 3 This is the communication and control connection diagram of the mobile wireless charging system of this application;

[0043] Figure 4 A schematic diagram of the flow chart of the first embodiment of the mobile electric vehicle wireless charging method proposed in the embodiment of the present application;

[0044] Figure 5 A schematic diagram of the structure of a second embodiment of a mobile electric vehicle wireless charging system proposed in an embodiment of the present application;

[0045] Figure 6 A schematic diagram of the structure of a third embodiment of a mobile electric vehicle wireless charging system proposed in an embodiment of the present application;

[0046] Figure 7 A schematic diagram of the structure of a fourth embodiment of a mobile electric vehicle wireless charging system proposed in an embodiment of the present application;

[0047] Figure 8 Mechanical vibration control diagram for foreign body removal of ground equipment in this application;

[0048] Fig. 9This is the circuit and control architecture diagram of the wireless charging system of this application;

[0049] Fig.10 This is a curve showing the change of efficiency of the wireless charging system according to this application as a function of M;

[0050] Fig.11 This is the first working principle diagram of the portable wireless charging system of this application;

[0051] Fig.12 This is the second working principle diagram of the portable wireless charging system of this application.

[0052] Description of Figure Numbers:

[0053]

[0054]

[0055] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0059] The main solution of the embodiment of the present application is: through the cloud management platform 1, a single ground-end device can charge multiple vehicles in an orderly manner, and there is no need for high-precision parking on the vehicle side, thereby reducing the cost of the wireless charging system.

[0060] In this embodiment, for the convenience of description, the following description is made with the cloud management platform 1 as the execution entity.

[0061] As the industry is just starting out, the small scale leads to high costs for system components, especially the ground-end equipment of the wireless charging system is several times more expensive than the traditional wired / conductive charging. Since there are many power conversion links in the system, and the application links are complex, there are many uncertain factors in the working conditions, and the average efficiency of the system can still be optimized. The construction and promotion of ground-end equipment are limited, and there are certain promotion bottlenecks in power distribution, parking space layout, etc. The wireless charging system requires the vehicle to park accurately, which is within the allowable charging range. The range is small, and it is difficult for both manual and automatic driving vehicles to park accurately at one time. Wireless charging uses high-frequency alternating magnetic fields for wireless energy transmission. In order to ensure the safety of the electromagnetic environment, the traditional wireless charging method needs to add foreign object detection functions, which greatly increases the complexity and cost of the equipment. In addition, the foreign object detection function has certain detection blind spots and detection accuracy, and it is difficult to avoid all electromagnetic environment safety risks under 100% working conditions.

[0062] The present application provides a solution. The present application realizes orderly charging of multiple vehicles by a single ground-end device through a cloud management platform 1. The ground-end device actively searches for charging vehicles and performs charging alignment through a transport cart 3. There is no need for the vehicle to perform high-precision parking, thereby improving the user's charging experience. The ground device 2 can actively remove foreign objects to ensure the safety of the electromagnetic environment during the charging process. The ground device 2 can achieve the most efficient distance control during the charging process of electric vehicles, which can effectively improve the energy transmission efficiency. The wireless charging system in the present application does not require fixed parking spaces to build ground-end equipment, and the parking space modification and construction costs are reduced, and it is not limited by regional distribution capacity.

[0063] It should be noted that if Figure 1 to Figure 3 As shown, the ground (end) equipment in the present application includes: a transport cart with an automatic navigation system, standardized primary edge equipment, standardized non-vehicle-mounted power components, batteries or power plug-in facilities, height and offset controllable fork rods, power and signal cables. The power supply equipment in the present application is a battery or power plug-in facility, the power component 21 is a standardized non-vehicle-mounted power component, the primary edge equipment 22 is a standardized primary edge equipment, and the controllable fork rod 31 is a height and offset controllable fork rod.

[0064] Based on this, an embodiment of the present application provides a method for wireless charging of a mobile electric vehicle.

[0065] Reference Figure 4 , Figure 4 This is a flow chart of a first embodiment of a mobile electric vehicle wireless charging method proposed in an embodiment of the present application.

[0066] Considering the orderly charging of multiple vehicles by a single ground device 2, such as Figure 4As shown, the mobile electric vehicle wireless charging method described in this embodiment includes steps S10 to S40:

[0067] Step S10: receiving charging request signals from a plurality of electric vehicles, and placing the plurality of electric vehicles into a charging queue.

[0068] Step S20: When the current electric vehicle is in the charging queue, a charging instruction is sent to the ground device 2, and the current electric vehicle is charged through the ground device 2.

[0069] Step S30: When the current electric vehicle is fully charged, the current electric vehicle is removed from the charging queue.

[0070] Step S40: Return to the step when the current electric vehicle is in the charging queue, until all electric vehicles in the charging queue have completed charging.

[0071] It should be noted that the multiple electric vehicles can be electric vehicles of different brands, and the charging queues can be sorted according to the principle of priority to ensure that the electric vehicles are charged in an orderly manner. The charging request signal and charging instruction can be sent and received through a wireless communication network, such as a wireless local area network. The current completion of electric vehicle charging can be detected by the ground equipment 2 and fed back to the cloud management platform 1.

[0072] In a specific implementation, the cloud management platform 1 receives charging request signals from multiple electric vehicles, and puts the multiple electric vehicles into a charging queue. When the charging queue reaches the current electric vehicle, a charging instruction is sent to the ground device 2, and the current electric vehicle is charged through the ground device 2. When the ground device 2 detects that the charging of the current electric vehicle is complete, it sends a stop signal to the cloud management platform 1. When the cloud management platform 1 receives the stop signal, it removes the current electric vehicle from the charging queue and returns to the step when the charging queue reaches the current electric vehicle, until all electric vehicles in the charging queue are charged, thereby enabling a single ground device 2 to charge multiple vehicles in an orderly manner, reducing the cost of the wireless charging system.

[0073] Furthermore, considering other situations of the electric vehicle waiting to be charged, after step S20, step S201 is further included:

[0074] Step S201: When the current electric vehicle is not in the charging queue and a charging termination signal of the current electric vehicle is received, the current electric vehicle is removed from the charging queue.

[0075] It should be noted that the charging termination signal can be sent via a wireless communication network, such as a wireless local area network.

[0076] In a specific implementation, the electric vehicle sends a charging termination signal to the cloud management platform 1 while waiting for charging, and the cloud management platform 1 removes the current electric vehicle from the charging queue, thereby achieving orderly management of the electric vehicle charging.

[0077] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the first embodiment can refer to the above introduction, and will not be repeated in the following. Figure 5 , Figure 5 This is a structural schematic diagram of a second embodiment of a mobile electric vehicle wireless charging system proposed in an embodiment of the present application.

[0078] Considering the orderly charging of multiple vehicles by a single ground device 2, such as Figure 5 As shown, the mobile electric vehicle wireless charging system includes: a cloud management platform 1 and ground equipment 2;

[0079] The ground equipment 2 is connected to the cloud management platform 1;

[0080] The cloud management platform 1 is used to receive charging request signals and location signals of multiple electric vehicles, and put the multiple electric vehicles into a charging queue;

[0081] The cloud management platform 1 is also used to send a charging instruction and a position signal to the ground device 2 when the current electric vehicle is in the charging queue;

[0082] The ground device 2 is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle upon receiving a charging instruction;

[0083] The ground device 2 is also used to stop charging the current electric vehicle and send a stop signal to the cloud management platform 1 when detecting that the current electric vehicle is fully charged;

[0084] The cloud management platform 1 is also used to remove the current electric vehicle from the charging queue when a stop signal is received.

[0085] It should be noted that the charging request signal, position signal, charging instruction, and stop signal can be sent through a wireless communication network, such as a wireless local area network. The power supply device is a battery or a power plug facility, and its functions are: when the wireless charging system is powered by a battery, the device has a built-in energy storage battery; when the wireless charging system is powered by a power supply, the device is a power connector (AC contactor, circuit breaker, lightning protection and other power distribution equipment and cables).

[0086] It is understandable that if Figure 1As shown, the electric vehicle includes: an on-board device, which is used to receive electromagnetic signals from the ground device 2 and convert them into direct current to charge / power the vehicle battery and the on-board electrical equipment.

[0087] In a specific implementation, the cloud management platform 1 is used to receive charging request signals and position signals of multiple electric vehicles, and put the multiple electric vehicles into a charging queue. The cloud management platform 1 is also used to send a charging instruction and a position signal to the ground device 2 when the charging queue reaches the current electric vehicle. The ground device 2 is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle when receiving the charging instruction. The ground device 2 is also used to stop charging the current electric vehicle and send a stop signal to the cloud management platform 1 when it detects that the charging of the current electric vehicle is completed. The cloud management platform 1 is also used to remove the current electric vehicle from the charging queue when the stop signal is received, thereby realizing orderly charging of multiple vehicles by a single ground device 2, thereby reducing the cost of the wireless charging system.

[0088] Based on the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those of the second embodiment can be referred to the above introduction, and will not be repeated in the following. Figure 6 , Figure 6 This is a structural schematic diagram of a third embodiment of a mobile electric vehicle wireless charging system proposed in an embodiment of the present application.

[0089] Considering how the ground equipment 2 charges the electric vehicle, the ground equipment 2 includes: a primary side device 22 and a power component 21;

[0090] The primary side device 22 is connected to the power component 21;

[0091] The power component 21 is used to send a second current signal to the primary device 22 when receiving the first current signal from the power supply device;

[0092] The primary side device 22 is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle when receiving the second current signal.

[0093] It should be noted that if Figure 1As shown, the power component 21 is a standardized non-power component (power conversion device), and its functions are: when powered by a battery, it converts direct current into high-frequency alternating current to provide high-frequency current excitation for the standardized primary device 22; when powered by a power supply, it converts industrial frequency alternating current into high-frequency alternating current to provide high-frequency current excitation for the standardized primary device 22. The primary device 22 is a standardized primary device 22, and its functions are: receiving high-frequency current from the standardized non-power component, generating a high-frequency electromagnetic field, and providing alternating electromagnetic energy to the vehicle-mounted equipment; and having a built-in mutual inductance detection device to provide location information for the ground-end equipment of the wireless charging system.

[0094] In a specific implementation, the power component 21 is used to send a second current signal to the primary device 22 when receiving the first current signal from the power supply device, and the primary device 22 is used to send an electromagnetic signal to the current electric vehicle when receiving the second current signal to charge the current electric vehicle, thereby realizing charging of the electric vehicle.

[0095] Furthermore, considering that the ground device 2 performs a communication handshake before charging the current electric vehicle, in order to ensure normal communication, the ground device 2 is used to send a handshake signal to the current electric vehicle when receiving a charging instruction;

[0096] The ground device 2 is also used to complete the communication handshake when receiving the handshake success signal fed back by the current electric vehicle.

[0097] It should be noted that the communication handshake between the electric vehicle and the cloud management platform 1 is an important process, which ensures the establishment and reliability of communication between the two parties. In this application, if the communication handshake fails, the ground device 2 returns the reason for the handshake failure to the cloud management platform 1. The communication handshake process between the ground device 2 and the electric vehicle in this application usually includes the following steps: after the electric vehicle enters the charging area, the on-board device scans the ground charging device; signal recognition is achieved through electromagnetic induction between the receiving coil of the vehicle chassis and the ground transmitting coil; the two parties negotiate the communication protocol and parameters by exchanging messages, and these messages may include the communication protocol version number, battery parameters, maximum output capacity of the charger, etc.; if the communication handshake is successful, the two parties can start to transmit actual data, the ground device 2 can send control instructions to the electric vehicle (such as start charging, stop charging, etc.), and the electric vehicle can also send status information to the ground device 2 (such as battery power, charging progress, etc.).

[0098] In a specific implementation, when the ground device 2 receives a charging instruction, it sends a handshake signal to the current electric vehicle. When the ground device 2 receives a handshake success signal fed back by the current electric vehicle, it completes the communication handshake, thereby ensuring the establishment and reliability of communication.

[0099] Furthermore, considering that the ground device 2 performs device compatibility detection on the current electric vehicle before charging, and in order to ensure the safety of the charging process, the ground device 2 is also used to send a compatible signal to the current electric vehicle when the communication handshake is completed;

[0100] The ground device 2 is also used to complete compatibility detection when receiving a compatible passing signal of the current electric vehicle.

[0101] It should be noted that the compatibility test between the ground equipment 2 and the electric vehicle is an important part of ensuring the safety and efficiency of the electric vehicle charging process, such as: electromagnetic compatibility test, communication protocol compatibility test, etc. In this application, if the compatibility test fails, the ground equipment 2 returns the reason for the compatibility test failure to the cloud management platform 1.

[0102] In a specific implementation, when the ground device 2 completes the communication handshake, it sends a compatible signal to the current electric vehicle. When the ground device 2 receives the compatible pass signal from the current electric vehicle, it completes the compatibility detection, thereby ensuring the safety of the charging process.

[0103] Based on the third embodiment of the present application, in the fourth embodiment of the present application, the same or similar contents as those in the third embodiment can refer to the above description, and will not be repeated in the following. Figure 7 , Figure 7 This is a structural schematic diagram of a fourth embodiment of a mobile electric vehicle wireless charging system proposed in an embodiment of the present application.

[0104] Considering that the ground-side equipment actively searches for charging vehicles and performs charging alignment, there is no need for the vehicle to perform high-precision parking. In order to improve the user's charging experience, Figure 7 As shown, the ground equipment 2 also includes: a transport trolley 3;

[0105] The transport trolley 3 comprises: a controllable fork rod 31;

[0106] The transport trolley 3 is connected to the primary side equipment 22 and the power assembly 21 respectively, and the controllable fork rod 31 is connected to the transport trolley 3 and the primary side equipment 22;

[0107] The transport trolley 3 is used to navigate to the current location of the electric car when receiving the charging instruction and position signal, and move the ground device 2 to the bottom of the current electric car through the controllable fork rod 31 so that the ground device 2 can charge the current electric car.

[0108] It should be noted that the transport trolley 3 is a transport trolley 3 with an automatic navigation system. The transport trolley 3 is used to transport standardized primary edge equipment and standardized non-vehicle power components. When the transport trolley 3 receives the charging instruction from the cloud management platform 1, it automatically navigates to the parking space that needs to be charged. The transport trolley 3 controls the position of the fork rod in the three axial directions of telescopic, left, right, and up and down according to the instructions given by the ground equipment 2 of the wireless charging system. The control of the fork rod position can be achieved in a variety of ways, such as using a three-axis (X, Y, Z) power drive, or using crawlers, etc. The relevant implementation device can be installed in the transport trolley 3 or installed separately on the trolley. The controllable fork rod 31 is a height and offset controllable fork rod, and its functions are: when the power component 21 is started, it completes the movement in the three directions of X, Y, and Z according to the received instructions; before the power component 21 is started, it completes the Z-axis movement of a certain fork rod according to the received instructions, so that the standardized primary edge equipment is tilted and foreign matter on the surface of the primary edge equipment 22 is removed.

[0109] In a specific implementation, upon receiving the charging instruction and position signal, the transport trolley 3 navigates to the location of the current electric vehicle, and moves the ground device 2 to the bottom of the current electric vehicle through the controllable fork rod 31, so that the ground device 2 charges the current electric vehicle.

[0110] Furthermore, considering that the ground-end equipment actively removes foreign objects, and in order to ensure the safety of the electromagnetic environment during the charging process, the transport trolley 3 is also used to control the controllable fork rod 31 to remove foreign objects on the surface when the ground equipment 2 completes the compatibility test;

[0111] The transport trolley 3 is also used to control the controllable fork rod 31 to extend and send a positioning signal to the ground equipment 2 when the foreign matter on the surface of the controllable fork rod 31 is removed;

[0112] The ground equipment 2 is also used to start mutual inductance detection when receiving the in-position signal.

[0113] It should be noted that if Figure 8 As shown, the transport trolley 3 removes foreign matter from the surface of the primary device 22. One method of removing foreign matter is to lower or raise one of the fork rods to tilt the primary device 22, and then lower or raise the other fork rod to tilt the primary device 22. Repeat this process several times to make the objects on the surface of the primary device 22 slide off. After removing foreign matter according to the set tilt height and number of times, the fork rod is controlled to return to a horizontal position. It should be noted that this method only uses a mechanical shaking method to remove foreign matter. Other methods can also be used to remove or detect foreign matter in the steps. When executing this step, it is necessary to ensure that the primary device does not fall off the fork rod in the case of shaking. This can be achieved by designing related structures (such as buckles).

[0114] In a specific implementation, when the ground equipment 2 completes the compatibility test, the transport cart 3 controls the controllable fork rod 31 to remove foreign objects on the surface. When the transport cart 3 completes the removal of foreign objects on the surface of the controllable fork rod 31, it controls the controllable fork rod 31 to extend and sends a position signal to the ground equipment 2. When the ground equipment 2 receives the position signal, it starts mutual inductance detection, and the ground-end equipment automatically removes foreign objects to ensure the safety of the electromagnetic environment during charging.

[0115] Furthermore, the transport trolley 3 is also used to send a charging start signal to the ground equipment 2 when the mutual inductance detection is completed;

[0116] The ground equipment 2 is also used to charge the electric vehicle when a charging start signal is received.

[0117] It should be noted that the ground equipment 2 sends the detected mutual inductance value and the mutual inductance value range required by the vehicle-mounted equipment to the transport trolley 3, and the transport trolley 3 is adjusted according to the set fork rod position adjustment method. The first adjustment method is step 1: the fork rod position moves to the left (such as 1 cm), the wireless charging device performs mutual inductance value detection, and the mutual inductance detection value is compared with the first detection value. If the mutual inductance value decreases, the mutual inductance value detection is stopped, and the fork rod is controlled to move to the right (the moving distance is greater than the previous moving distance, such as 2 cm), and the third mutual inductance value detection value is compared with the first detection value. If the mutual inductance value decreases, the following steps are entered. If the mutual inductance value increases, it continues to move (such as 1 cm) until the mutual inductance value decreases relative to the previous position or reaches the required mutual inductance value range sent by the vehicle-mounted equipment; Step 2: According to the ground clearance range sent by the vehicle-mounted equipment in step 1, calculate whether the upper surface of the primary edge device 22 is at a distance h from the lower surface of the vehicle-mounted equipment, and raise the fork rod at a certain height (such as h / 4) until it meets the required mutual inductance value range sent by the vehicle-mounted equipment. The second adjustment method is to install a camera on the upper surface of the primary device 22, calculate the offset direction, offset value and height distance between the vehicle-mounted device and the ground device 2 by real-time image processing, and directly adjust the moving direction and movement value of the fork rod according to the calculation results. The third adjustment method is to install position detection sensors on both the primary device 22 and the vehicle-mounted device, calculate the offset direction, offset value and height distance between the vehicle-mounted device and the ground device 2 by position detection, and directly adjust the moving direction and movement value of the fork rod according to the calculation results.

[0118] In a specific implementation, when the transport cart 3 completes the mutual inductance detection, it sends a charging start signal to the ground equipment 2. When the ground equipment 2 receives the charging start signal, it charges the electric vehicle. Through mutual inductance detection, the most efficient distance control can be achieved during the charging process, which can effectively improve the energy transmission efficiency.

[0119] It should be noted that Figure 11-12 This is a working principle diagram of the mobile wireless charging system of this application. The working principle and steps of the mobile wireless charging system are as follows:

[0120] (1) The vehicle has arrived at the parking space, and the owner or the vehicle automatically sends a charging request signal. At the same time, the on-board device sends relevant information of the on-board device to the cloud management system, including but not limited to: the power level of the on-board device, the operating frequency of the on-board device, the output voltage range of the on-board device, the ground clearance range of the on-board device, the installation position / coordinates of the on-board device, the required mutual inductance value range of the on-board device, and the primary side device 22 coil current value required for the full power output of the on-board device.

[0121] (2) The cloud management platform 1 receives a charging request signal from the vehicle-mounted device (currently the electric vehicle), stores the vehicle number (including the vehicle-mounted device information and parking space information) in the charging queue, and sends the queue number to the vehicle-mounted device of the wireless charging system.

[0122] (3) The vehicle-mounted device determines whether it has received a charging number. If so, it proceeds to step 6; otherwise, it proceeds to step 4.

[0123] (4) The vehicle waits for charging. During the waiting period, it is determined whether the electric vehicle (user) actively initiates a signal to terminate charging. If so, the process proceeds to step 5. If not, the process continues to wait for charging.

[0124] (5) The cloud management platform 1 removes the relevant information and queue number of the vehicle that has terminated charging.

[0125] (6) The cloud management platform 1 sends a charging instruction to the transport vehicle 3 with automatic navigation function, and at the same time sends the parking space information and vehicle-mounted device information issued by the vehicle-mounted device in step 1.

[0126] (7) The transport vehicle 3 automatically navigates to the designated parking position.

[0127] (8) The ground device 2 of the wireless charging system performs a communication handshake with the vehicle-mounted device, wherein both the vehicle-mounted device and the ground device 2 are installed with relevant WiFi communication modules in accordance with national standards.

[0128] (9) The ground device 2 determines whether the handshake is successful. If so, it proceeds to step 11; otherwise, it proceeds to step 10.

[0129] (10) The ground device 2 sends a handshake failure message to the cloud management platform 1, and the ground device determines the reason for the handshake failure, sends the failure reason to the cloud management platform 1, and enters step 5 at the same time.

[0130] (11) The vehicle-mounted device and the ground device 2 perform compatibility detection, and the detection content is performed according to the vehicle-mounted device information sent by the vehicle-mounted device in step 1.

[0131] (12) The ground device 2 determines whether the compatibility test is passed. If so, it proceeds to step 14; otherwise, it proceeds to step 13.

[0132] (13) The ground device 2 sends the compatibility detection failure information to the cloud management platform 1, and the ground device 2 determines the reason for the compatibility detection failure, sends the failure reason to the cloud management platform 1, and enters step 5 at the same time.

[0133] (14) The ground equipment 2 sends a compatibility check pass message to the transport vehicle 3.

[0134] (15) The transport trolley 3 removes foreign matter from the surface of the primary device 22. One method of removal is to lower or raise one of the fork rods to tilt the primary device 22, and then lower or raise the other fork rod to tilt the primary device 22, and repeat this process several times to make the object on the surface of the primary device 22 slide off. After removing foreign matter according to the set tilt height and number of times, the fork rod is controlled to return to a horizontal position. It should be additionally explained that this method only uses a mechanical shaking method to remove foreign matter, and other methods can also be used in the steps to remove or detect foreign matter. When executing this step, it is necessary to ensure that the primary device 22 does not fall off the fork rod in the case of shaking, which can be achieved by designing relevant structures (such as buckles).

[0135] (16) The transport cart 3 calculates the distance the fork rod is extended according to the installation position information of the vehicle-mounted equipment sent by the vehicle-mounted equipment in step 1, and performs the extension and retraction of the fork rod according to the calculated value. The extension and retraction action can be achieved by installing a related driving mechanical structure inside the transport cart 3, or by designing tracks, pulleys, etc. on the fork rod. This step can also be performed in other ways, including but not limited to: installing a camera above the primary edge equipment 22 or below the vehicle-mounted equipment, and calculating the required extension distance of the fork rod through real-time image processing. Position sensors are installed on the ground equipment 2 and the vehicle-mounted equipment to calculate the relative position of the primary edge equipment 22 and the ground equipment 2 in real time, and then calculate the required extension distance of the fork rod. A ranging radar is installed at the rear of the vehicle in the parking space, and the required extension distance of the fork rod is calculated in combination with the installation position of the vehicle-mounted equipment.

[0136] (17) The transport vehicle 3 sends a signal to the ground device 2 that the fork rod has been extended and in place, and sends a request for mutual inductance value detection to the ground device 2. Note: The purpose of mutual inductance value detection is to ensure that the mutual inductance between the ground device 2 and the vehicle-mounted device is within the allowable working range, that is, to further confirm the position of the fork rod.

[0137] (18) The ground equipment 2 receives the fork rod in position information and starts mutual inductance value detection. There are many feasible methods for mutual inductance value detection, which will not be described in detail in the present invention.

[0138] (19) The ground device 2 completes the mutual inductance detection and determines whether the mutual inductance detection is passed by comparing the required mutual inductance value range sent by the vehicle-mounted device in step 1. If yes, proceed to step 21; otherwise, proceed to step 20.

[0139] (20) The ground device 2 sends the detected mutual inductance value and the mutual inductance value range required by the vehicle-mounted device to the transport trolley 3, and the transport trolley 3 adjusts the position of the fork rod according to the set method for adjusting the position of the fork rod. One of the set methods for adjusting the position of the fork rod is as follows: the position of the fork rod moves to the left (such as 1 cm), the wireless charging device detects the mutual inductance value, and compares the mutual inductance detection value with the first detection value. If the mutual inductance value decreases, the mutual inductance detection is stopped, and the fork rod is controlled to move to the right (the moving distance is greater than the last moving distance, such as 2 cm). The third mutual inductance value detection value is compared with the first detection value. If the mutual inductance value decreases, the following steps are entered. If the mutual inductance value increases, the movement continues (such as 1 cm) until the mutual inductance value decreases relative to the last position or reaches the required mutual inductance value range sent by the vehicle-mounted device. According to the ground clearance range sent by the vehicle-mounted device in step 1, calculate whether the distance h between the upper surface of the primary side device 22 and the lower surface of the vehicle-mounted device. Raise the fork rod by a certain height (such as h / 4) until it meets the required mutual inductance value range sent by the vehicle-mounted device. Another fork lever position adjustment method is as follows: a camera is installed on the upper surface of the primary edge device 22, and the offset direction, offset value and height distance between the vehicle-mounted device and the ground device 2 are calculated by real-time image processing, and the movement direction and movement value of the fork lever are directly adjusted according to the calculation results. The third fork lever position adjustment method is as follows: position detection sensors are installed on both the primary edge device 22 and the vehicle-mounted device, and the offset direction, offset value and height distance between the vehicle-mounted device and the ground device 2 are calculated by position detection, and the movement direction and movement value of the fork lever are directly adjusted according to the calculation results.

[0140] (21) The transport vehicle 3 sends a fork-in-place signal to the ground equipment 2, requesting to start charging.

[0141] (22) The ground device 2 sends a charging request message to the vehicle-mounted device. After the vehicle-mounted device allows it, the wireless charging system starts the charging process.

[0142] (23) The ground device 2 determines whether to stop charging. If so, it goes to step 28; otherwise, it goes to step 24.

[0143] (24) The wireless charging system determines whether the system efficiency meets the minimum charging requirement. If so, the process proceeds to step 25; otherwise, the process proceeds to step 26.

[0144] (25) The wireless charging system continues to charge.

[0145] (26) The ground equipment 2 sends a fork position adjustment request to the transport vehicle 3.

[0146] (27) The transport vehicle 3 receives the fork position adjustment request and performs the fork position adjustment according to the setting. The fork position adjustment method is executed according to step 20 and enters step 23.

[0147] (28) The wireless charging system sends a stop charging message to the cloud management platform 1 and stops charging. The information sent includes parking space information, vehicle equipment information, charging amount information, etc.

[0148] (29) The cloud management platform 1 receives and stores the charging stop information, settles the charging fee according to the charging amount, etc., removes the charging vehicle information from the charging queue, updates the entire charging queue, and sends a charging request instruction for the next vehicle to the transport vehicle 3.

[0149] (30) The transport trolley 3 controls the fork rod to withdraw from the charging vehicle chassis according to the set telescopic value, and the transport trolley 3 withdraws from the parking space, and the charging process ends.

[0150] It should be noted that if Figures 9 to 12 As shown, the workflow of the wireless charging system equipment after starting charging is partially independent, and the specific process is as follows:

[0151] (1) The wireless charging system starts charging. The ground device 2 receives the primary coil current value requirement sent by the vehicle-mounted device. The ground device 2 performs a power slow start and gradually increases the primary coil current until the primary coil current value required by the vehicle-mounted device is met.

[0152] (2) The wireless charging system determines whether it has received a signal to terminate charging, or whether there is a fault that stops charging. If so, it proceeds to step 9; otherwise, it proceeds to step 3.

[0153] (3) The wireless charging system adjusts the output power and electrical parameters according to the charging requirements (charging voltage and current) issued by the vehicle.

[0154] (4) The wireless charging system performs real-time efficiency detection. There are many detection methods, one of which is to collect the voltage U of the DC output of the system. out 、Current I out And the system AC input voltage U in 、Input current I in , input power factor k in , then the real-time efficiency of the system is η0=(U out ×I out ) / (U in ×I in ×k in ).

[0155] (5) When the wireless charging system is at full power output, compare η0 with the minimum required efficiency ηreq , if η0≥η req , go to step 6, otherwise go to step 7.

[0156] (6) The wireless charging system continues to charge according to the charging requirements issued by the vehicle and performs efficiency detection in real time.

[0157] (7) The ground equipment 2 sends an instruction to the transport vehicle 3 to adjust the fork rod, and also sends information on the required trend (increase or decrease) of the mutual inductance value.

[0158] Wireless charging system circuit and control architecture Fig. 9 As shown, wireless charging uses a bilateral LCC resonant compensation network with fixed parameters, where the resonant compensation parameters of the ground equipment 2 are fixed, referring to the national standard design value, and the resonant compensation parameters of the vehicle equipment are designed according to the vehicle model requirements (each model has a set of fixed parameters). The ground equipment 2 uses a full-bridge inverter, and its main control variable is the phase shift angle α. The vehicle equipment uses a controllable rectifier, and its main control variable is the operating duty cycle D1 value of the switching device.

[0159] The system efficiency under a set of typical parameters varies with the primary coil C p , secondary coil C s The change curve of mutual inductance M is as follows: Fig.10 As shown in the figure, no matter how the two main control variables change, the system efficiency increases with the increase of M. Therefore, in this step, when the real-time detection efficiency value η0 of the system is lower than the minimum required efficiency η req When the ground device 2 sends the instruction to the transport vehicle 3 to increase the M value, the ground device 2 sends the instruction to increase the M value. When the ground and vehicle-mounted reference devices in the national standard GB / T 38775 are used, if the M value is to be increased, it is necessary to reduce the offset between the primary device 22 and the secondary device or reduce the vertical distance between the primary device 22 and the secondary device.

[0160] (8) The ground equipment 2 receives the fork position adjustment completion information (position signal) sent by the transport vehicle 3 and enters step 2.

[0161] (9) The wireless charging system sends a stop charging message (charging termination signal) to the cloud management platform 1. If charging is stopped due to a fault, the fault type must be sent and the wireless charging system stops charging.

[0162] The present application also proposes an electric vehicle, which includes the above-mentioned movable electric vehicle wireless charging system.

[0163] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A mobile electric vehicle wireless charging method, characterized in that: The mobile electric vehicle wireless charging method comprises: receiving charging request signals from a plurality of electric vehicles, and placing the plurality of electric vehicles into a charging queue; When the current electric vehicle is in the charging queue, a charging instruction is sent to the ground device, and the current electric vehicle is charged through the ground device; When the current electric vehicle is fully charged, the current electric vehicle is removed from the charging queue; Return to the step when the current electric vehicle is in the charging queue until all electric vehicles in the charging queue have completed charging.

2. The method for wireless charging of a mobile electric vehicle as claimed in claim 1, characterized in that: After the step of sending a charging instruction to the ground device when the current electric vehicle is in the charging queue, and charging the current electric vehicle through the ground device, the method further includes: When the current electric vehicle is not in the charging queue and a charging termination signal of the current electric vehicle is received, the current electric vehicle is removed from the charging queue.

3. A mobile electric vehicle wireless charging system, characterized in that: The mobile electric vehicle wireless charging system includes: a cloud management platform and ground equipment; The ground equipment is connected to the cloud management platform; The cloud management platform is used to receive charging request signals and location signals of multiple electric vehicles, and put the multiple electric vehicles into a charging queue; The cloud management platform is also used to send charging instructions and location signals to ground equipment when the current electric vehicle is in the charging queue; The ground device is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle upon receiving a charging instruction; The ground device is also used to stop charging the current electric vehicle and send a stop signal to the cloud management platform when it is detected that the current electric vehicle is fully charged; The cloud management platform is also used to remove the current electric vehicle from the charging queue when a stop signal is received.

4. The mobile electric vehicle wireless charging system as claimed in claim 3, characterized in that: The ground equipment includes: primary side equipment and power components; The primary side device is connected to the power component; The power component is used to send a second current signal to the primary side device when receiving the first current signal from the power supply device; The primary side device is used to send an electromagnetic signal to the current electric vehicle to charge the current electric vehicle when receiving the second current signal.

5. The mobile electric vehicle wireless charging system as claimed in claim 4, characterized in that: The ground device is used to send a handshake signal to the current electric vehicle upon receiving a charging instruction; The ground device is also used to complete the communication handshake when receiving the handshake success signal fed back by the current electric vehicle.

6. The mobile electric vehicle wireless charging system as claimed in claim 5, characterized in that: The ground device is also used to send a compatible signal to the current electric vehicle when the communication handshake is completed; The ground equipment is also used to complete compatibility detection when receiving a compatible passing signal of the current electric vehicle.

7. The mobile electric vehicle wireless charging system as claimed in claim 6, characterized in that: The ground equipment also includes: a transport trolley; The transport trolley comprises: a controllable fork rod; The transport trolley is connected to the primary side equipment and the power assembly respectively, and the controllable fork rod is connected to the transport trolley and the primary side equipment; The transport trolley is used to navigate to the location of the current electric car when receiving the charging instruction and the location signal, and move the ground device to the bottom of the current electric car through the controllable fork rod so that the ground device can charge the current electric car.

8. The mobile electric vehicle wireless charging system as claimed in claim 7, characterized in that: The transport trolley is also used to control the controllable fork rod to remove foreign matter on the surface when the ground equipment completes the compatibility test; The transport trolley is also used to control the controllable fork rod to extend and send a positioning signal to the ground equipment when the foreign matter on the surface of the controllable fork rod is removed; The ground equipment is also used to start mutual inductance detection when receiving the in-position signal.

9. The mobile electric vehicle wireless charging system as claimed in claim 8, characterized in that: The transport trolley is further used to send a charging start signal to the ground equipment when the mutual inductance detection is completed; The ground equipment is also used to charge the electric vehicle when a charging start signal is received.

10. An electric vehicle, characterized in that: The electric vehicle comprises the movable electric vehicle wireless charging system according to any one of claims 1 to 9.

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