A control system and method for improving wireless charging efficiency of electric vehicles

Abstract

The present invention discloses a control system and method for improving the wireless charging efficiency of electric vehicles. The system includes: an on-board receiving device and a ground transmitting device; the on-board receiving device includes: a whole vehicle controller, the whole vehicle controller is respectively connected to a camera, a radar, a display screen, a driver and a wireless charging receiving coil; the wireless charging receiving coil is connected to a power battery; the driver is connected to a motor; the wireless charging receiving coil is installed under the vehicle body floor, the wireless charging receiving coil is installed at one end of a mechanical arm, and the other end of the mechanical arm is connected to the motor; the ground transmitting device includes: a parking space controller installed under the ground of the parking space, which is connected to the wireless charging transmitting coil, the transmitting coil is arranged under the ground of the parking space, and the transmitting coil is connected to the power grid; the transmitting coil supplies power to the wireless charging receiving coil through a magnetic field; the whole vehicle controller and the parking space controller communicate wirelessly; a positioning mark is provided at the center of the wireless charging transmitting coil.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a control system and method for improving the wireless charging efficiency of electric vehicles. Background Art

[0002] The statements in this section merely mention background art related to the present invention and do not necessarily constitute prior art.

[0003] At present, the electric vehicle market is becoming more and more popular, and its share of the automobile market is also increasing. However, due to the practical obstacles of charging problems, the promotion of electric vehicles has been affected to a certain extent.

[0004] Currently, the main charging modes on the market include AC charging, DC fast charging, and quick-swap charging. Each has its advantages and disadvantages, including insufficient automation. Wireless charging, however, eliminates the inconvenience of manual operation to a certain extent because it requires no manual operation. Furthermore, wireless charging offers high safety and holds great promise for future technological development. However, wireless charging currently faces challenges such as low efficiency (traditional line charging efficiency is approximately 95%, while wireless charging efficiency is only around 90%) and electromagnetic compatibility, which need to be addressed urgently. Summary of the Invention

[0005] In order to solve the problem of alignment between the wireless charging receiving module and the wireless charging generating module during the charging process, the present invention provides a control system and method for improving the wireless charging efficiency of electric vehicles; by controlling the position of the wireless charging receiving module, the alignment between it and the wireless charging transmitting module is improved, thereby improving the charging efficiency.

[0006] In a first aspect, the present invention provides a control system for improving the efficiency of wireless charging of electric vehicles;

[0007] A control system for improving the wireless charging efficiency of electric vehicles, comprising: an on-vehicle receiving device and a ground transmitting device;

[0008] The vehicle-mounted receiving device includes: a vehicle controller, which is respectively connected to the camera, radar, display, driver, and wireless charging receiving coil; the wireless charging receiving coil is connected to the power battery; the driver is connected to the motor; the wireless charging receiving coil is installed under the vehicle body floor, and the wireless charging receiving coil is installed at one end of the robotic arm, and the other end of the robotic arm is connected to the motor;

[0009] The ground transmitting equipment includes: a parking space controller, which is installed under the ground of the parking space and connected to the wireless charging transmitting coil. The wireless charging transmitting coil is arranged under the ground of the parking space and connected to the power supply grid; the wireless charging transmitting coil supplies power to the wireless charging receiving coil through the magnetic field; the vehicle controller and the parking space controller communicate wirelessly; a positioning mark is set at the center of the wireless charging transmitting coil.

[0010] In a second aspect, the present invention provides a control method for improving the efficiency of wireless charging of electric vehicles;

[0011] A control method for improving wireless charging efficiency of an electric vehicle, comprising:

[0012] When the vehicle is parked, the vehicle controller receives a command to start the wireless charging mode;

[0013] The vehicle controller turns on the camera and radar, and uses the camera and radar to monitor the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil;

[0014] The vehicle controller calculates the overlap area between the wireless charging receiving coil and the wireless charging transmitting coil based on the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil, calculates the ratio of the overlap area to the area of ​​the wireless charging receiving coil, and uses the ratio as the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil; and outputs the overlap rate to the display screen;

[0015] The vehicle controller determines whether the overlap rate exceeds a first set threshold. If the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds the first set threshold, the vehicle controller prompts the driver to stop the vehicle through the display screen;

[0016] Electric vehicles are starting to charge wirelessly.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By controlling the position of the wireless charging receiving module, the alignment between the receiving module and the wireless charging transmitting module is improved, thereby enhancing charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 Schematic diagram of the wireless charging framework of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] In the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0024] All data in this embodiment is obtained in compliance with laws and regulations and based on the consent of the user, and is used legally.

[0025] Example 1

[0026] This embodiment provides a control system for improving the wireless charging efficiency of electric vehicles;

[0027] like Figure 1 As shown, a control system for improving the wireless charging efficiency of electric vehicles includes: a vehicle-mounted receiving device and a ground-based transmitting device;

[0028] The vehicle-mounted receiving device includes: a vehicle controller, which is respectively connected to the camera, radar, display, driver, and wireless charging receiving coil; the wireless charging receiving coil is connected to the power battery; the driver is connected to the motor; the wireless charging receiving coil is installed under the vehicle body floor, and the wireless charging receiving coil is installed at one end of the robotic arm, and the other end of the robotic arm is connected to the motor;

[0029] The ground transmitting equipment includes: a parking space controller, which is installed under the ground of the parking space and connected to the wireless charging transmitting coil. The wireless charging transmitting coil is arranged under the ground of the parking space and connected to the power supply grid; the wireless charging transmitting coil supplies power to the wireless charging receiving coil through the magnetic field; the vehicle controller and the parking space controller communicate wirelessly; a positioning mark is set at the center of the wireless charging transmitting coil.

[0030] It should be understood that because the wireless charging transmitter module and the wireless charging receiver module are close to each other, the entire wireless charging transmitter module cannot be fully identified, and a positioning mark needs to be made on the surface of the wireless charging transmitter module for easy identification.

[0031] Furthermore, the system further comprises:

[0032] When the vehicle is parked, the vehicle controller receives a command to start the wireless charging mode;

[0033] The vehicle controller turns on the camera and radar, and uses the camera and radar to monitor the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil;

[0034] The vehicle controller calculates the overlap area between the wireless charging receiving coil and the wireless charging transmitting coil based on the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil, calculates the ratio of the overlap area to the area of ​​the wireless charging receiving coil, and uses the ratio as the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil; and outputs the overlap rate to the display screen;

[0035] The vehicle controller determines whether the overlap rate exceeds a first set threshold. If the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds the first set threshold, the vehicle controller prompts the driver to stop the vehicle through the display screen;

[0036] Electric vehicles are starting to charge wirelessly.

[0037] Furthermore, the system further comprises:

[0038] After the vehicle controller prompts the driver to stop the vehicle through the display screen and before the electric vehicle starts wireless charging, the method further includes:

[0039] The vehicle controller receives the automatic adjustment instruction and sends an instruction to the driver. The driver controls the movement of the motor, drives the movement of the robotic arm, realizes the horizontal movement of the wireless charging receiving coil, and makes the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceed the second set threshold. When the second set threshold is exceeded, the movement of the robotic arm is stopped.

[0040] Furthermore, the system further comprises:

[0041] After the movement of the robotic arm is stopped and before the electric vehicle starts wireless charging, the method further includes:

[0042] The vehicle controller sends instructions to the driver, which controls the motor movement, driving the robotic arm to move, so that the wireless charging receiving coil moves downward in a direction perpendicular to the ground until the distance between the wireless charging receiving coil and the wireless charging transmitting coil is less than the set distance, and the movement of the robotic arm stops.

[0043] Example 2

[0044] This embodiment provides a control method for improving the wireless charging efficiency of an electric vehicle;

[0045] A control method for improving wireless charging efficiency of an electric vehicle, comprising:

[0046] S201: When the vehicle is parked, the vehicle controller receives an instruction to start the wireless charging mode;

[0047] S202: The vehicle controller turns on the camera and radar, and uses the camera and radar to monitor the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil;

[0048] S203: The vehicle controller calculates the overlap area between the wireless charging receiving coil and the wireless charging transmitting coil based on the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil, calculates the ratio of the overlap area to the area of ​​the wireless charging receiving coil, and uses the ratio as the overlap ratio between the wireless charging receiving coil and the wireless charging transmitting coil; and outputs the overlap ratio to the display screen;

[0049] S204: The vehicle controller determines whether the overlap rate exceeds a first set threshold. If the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds the first set threshold, the vehicle controller prompts the driver to stop the vehicle through the display screen;

[0050] S205: The electric vehicle starts wireless charging.

[0051] Furthermore, after the vehicle controller prompts the driver to stop the vehicle through the display screen and before the electric vehicle starts wireless charging, the method further includes:

[0052] S204-1: The vehicle controller receives the automatic adjustment instruction and sends an instruction to the driver. The driver controls the movement of the motor to drive the movement of the robotic arm, so that the wireless charging receiving coil moves in the horizontal direction, so that the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds a second set threshold. When the second set threshold is exceeded, the movement of the robotic arm is stopped.

[0053] Furthermore, after stopping the movement of the robotic arm and before starting wireless charging of the electric vehicle, the method further includes:

[0054] S204-2: The vehicle controller sends a command to the driver, which controls the motor movement, driving the robotic arm to move, so that the wireless charging receiving coil moves downward in a direction perpendicular to the ground until the distance between the wireless charging receiving coil and the wireless charging transmitting coil is less than the set distance, and then stops the movement of the robotic arm.

[0055] Furthermore, after stopping the movement of the robotic arm, the method further includes:

[0056] S204-3: The vehicle controller notifies the driver through the display screen that the coil alignment has been completed, allowing the driver to stop and turn off the engine, and the electric vehicle begins wireless charging.

[0057] Furthermore, the method further includes:

[0058] If the overlap rate is less than or equal to the first set threshold, the vehicle controller prompts the driver to continue adjusting the vehicle position through the display screen.

[0059] Furthermore, the first set threshold is 85%.

[0060] Furthermore, the second set threshold is 95%.

[0061] Furthermore, the set distance is 5 mm.

[0062] It should be understood that by enabling the wireless charging receiving coil to move downward in a direction perpendicular to the ground, the distance between the wireless charging receiving coil and the wireless charging transmitting module is reduced, thereby improving the charging efficiency.

[0063] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A control system for improving the efficiency of wireless charging of electric vehicles, characterized by: include: Vehicle-mounted receiving equipment and ground-based transmitting equipment; The vehicle-mounted receiving device includes: a vehicle controller, which is respectively connected to the camera, radar, display, driver, and wireless charging receiving coil; the wireless charging receiving coil is connected to the power battery; the driver is connected to the motor; the wireless charging receiving coil is installed under the vehicle body floor, and the wireless charging receiving coil is installed at one end of the robotic arm, and the other end of the robotic arm is connected to the motor; The ground transmitting device includes: a parking space controller, which is installed below the ground surface of the parking space and connected to a wireless charging transmitting coil. The wireless charging transmitting coil is arranged below the ground surface of the parking space and connected to the power grid. The wireless charging transmitting coil supplies power to the wireless charging receiving coil via a magnetic field. The vehicle controller and the parking space controller communicate wirelessly. A positioning mark is provided at the center of the wireless charging transmitting coil. When the vehicle is parked, the vehicle controller receives a command to start the wireless charging mode; The vehicle controller turns on the camera and radar, and uses the camera and radar to monitor the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil; The vehicle controller calculates the overlap area between the wireless charging receiving coil and the wireless charging transmitting coil based on the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil, calculates the ratio of the overlap area to the area of ​​the wireless charging receiving coil, and uses the ratio as the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil; and outputs the overlap rate to the display screen; The vehicle controller determines whether the overlap rate exceeds a first set threshold. If the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds the first set threshold, the vehicle controller prompts the driver to stop the vehicle through the display screen; Electric vehicles are beginning to charge wirelessly; After the vehicle controller prompts the driver to stop the vehicle through the display screen and before the electric vehicle starts wireless charging, the method further includes: The vehicle controller receives the automatic adjustment instruction and sends an instruction to the driver. The driver controls the movement of the motor, drives the movement of the robotic arm, and realizes the horizontal movement of the wireless charging receiving coil. The overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds a second set threshold. When the second set threshold is exceeded, the movement of the robotic arm is stopped. After the movement of the robotic arm is stopped and before the electric vehicle starts wireless charging, the method further includes: The vehicle controller sends instructions to the driver, which controls the motor movement, driving the robotic arm to move, so that the wireless charging receiving coil moves downward in a direction perpendicular to the ground until the distance between the wireless charging receiving coil and the wireless charging transmitting coil is less than the set distance, and the movement of the robotic arm stops.

2. A control method for improving the efficiency of wireless charging of electric vehicles, characterized in that: include: When the vehicle is parked, the vehicle controller receives a command to start the wireless charging mode; The vehicle controller turns on the camera and radar, and uses the camera and radar to monitor the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil; The wireless charging receiving coil is installed under the vehicle body floor, and the wireless charging transmitting coil is arranged under the parking space floor; The vehicle controller calculates the overlap area between the wireless charging receiving coil and the wireless charging transmitting coil based on the distance between the center position of the wireless charging receiving coil and the positioning mark of the wireless charging transmitting coil, calculates the ratio of the overlap area to the area of ​​the wireless charging receiving coil, and uses the ratio as the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil; and outputs the overlap rate to the display screen; The vehicle controller determines whether the overlap rate exceeds a first set threshold. If the overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds the first set threshold, the vehicle controller prompts the driver to stop the vehicle through the display screen; Electric vehicles are beginning to charge wirelessly; After the vehicle controller prompts the driver to stop the vehicle through the display screen and before the electric vehicle starts wireless charging, the method further includes: The vehicle controller receives the automatic adjustment instruction and sends an instruction to the driver. The driver controls the movement of the motor, drives the movement of the robotic arm, and realizes the horizontal movement of the wireless charging receiving coil. The overlap rate between the wireless charging receiving coil and the wireless charging transmitting coil exceeds a second set threshold. When the second set threshold is exceeded, the movement of the robotic arm is stopped. After the movement of the robotic arm is stopped and before the electric vehicle starts wireless charging, the method further includes: The vehicle controller sends instructions to the driver, which controls the motor movement, driving the robotic arm to move, so that the wireless charging receiving coil moves downward in a direction perpendicular to the ground until the distance between the wireless charging receiving coil and the wireless charging transmitting coil is less than the set distance, and the movement of the robotic arm stops.

3. The method for improving the wireless charging efficiency of an electric vehicle according to claim 2, wherein: After stopping the movement of the robotic arm, the method further includes: The vehicle controller prompts the driver through the display screen that the coil alignment has been completed, allowing the driver to stop and turn off the engine, and the electric vehicle begins wireless charging.

4. The method for improving the wireless charging efficiency of an electric vehicle according to claim 2, wherein: The method further comprises: If the overlap rate is less than or equal to the first set threshold, the vehicle controller prompts the driver to continue adjusting the vehicle position through the display screen.

5. The method for improving the wireless charging efficiency of an electric vehicle according to claim 2, wherein: The first set threshold is 85%, the second set threshold is 95%, and the set distance is 5 mm.

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