Wireless charging system and method for new energy sweeper

Abstract

The invention discloses a new energy road sweeper wireless charging system which comprises a vehicle body and a ground platform, a receiving end is arranged at the bottom of the vehicle body, a transmitting end is arranged on the ground platform, a control system and a composite positioning system are arranged on the receiving end, and a detection unit is arranged on the ground platform. The wireless charging safety of the vehicle can be improved. The invention further provides a wireless charging method of the new energy sweeping vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of sweeping vehicles, and specifically, the present invention relates to a wireless charging system and method for a new energy sweeping vehicle. Background Art

[0002] Wireless charging technology is a new power transmission method that eliminates the need for traditional charging cables. It uses electromagnetic induction, magnetic field resonance, or radio waves to charge vehicle batteries without the need for traditional charging cables. Its system architecture consists of a transmitter and a receiver. The transmitter generates an alternating magnetic field using a power module, inverter, and transmitting coil. The receiver, using a receiving coil, compensation circuit, and rectifier, converts the energy in the magnetic field into electrical energy to charge the battery.

[0003] Currently, the wireless charging process of sweepers is affected by the presence of metal objects on the ground or people staying nearby, which causes interference with the magnetic field and affects the charging efficiency of the battery.

[0004] Patent publication number CN112968496A, published on June 15, 2021, discloses an automatic charging system and control method for an unmanned sweeper. The system includes the following steps: when the built-in system detects that the battery level is below a preset threshold, the communication module locates the charging station; the sweeper is guided to the designated location based on the positioning navigation; and the charging station docks with the sweeper's charging head for charging. This automatic charging system and control method for unmanned sweepers also fails to resolve the technical issues described above. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies in the prior art and provide a new energy sweeper wireless charging system and method that improves the safety of vehicle wireless charging.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The wireless charging system for a new energy sweeper includes a vehicle body and a ground platform. A receiving end is provided at the bottom of the vehicle body, a transmitting end is provided on the ground platform, a control system and a composite positioning system are provided on the receiving end, and a detection unit is provided on the ground platform.

[0008] The detection unit includes a millimeter wave radar and an infrared thermal imaging unit. The receiving end and the ground platform are both provided with a safety protection unit. The millimeter wave radar and the infrared thermal imaging unit are both connected to the safety protection unit by electrical signals.

[0009] The detection unit further includes a Hall sensor, which is electrically connected to the transmitting end.

[0010] A side wall platform is provided on one side of the ground platform, a cloud management platform is provided on the side wall platform, and a dynamic matching network is provided on the ground platform.

[0011] The transmitting end includes excitation coils, and the excitation coils are evenly distributed.

[0012] The receiving end and the ground platform are both provided with a thermal management system.

[0013] The wireless charging method for the new energy sweeper is implemented using the above-mentioned wireless charging system for the new energy sweeper, and includes the following steps:

[0014] Step 1: The vehicle is parked in the designated charging area to check the vehicle's location and battery conditions.

[0015] Step 2: Millimeter-wave radar and infrared thermal imaging units detect living body information in the charging area; Hall sensors monitor magnetic field changes;

[0016] Step 3: The transmitter and receiver start charging the vehicle.

[0017] In step 2, when a living target is detected for 2 seconds, the safety protection unit cuts off energy transmission; if no living information is detected, charging is performed.

[0018] In step 2, the Hall sensor monitors whether the magnetic field is distorted. If the magnetic field is distorted, an alarm is issued. If there is no abnormality, charging is performed.

[0019] The technical effect of the present invention is: by adopting the wireless charging system and method of the new energy sweeper of the present invention, a receiving end is set on the chassis of the vehicle body, and the use of the transmitting end on the ground platform is coordinated to realize unlimited charging of the vehicle. By using millimeter wave radar, infrared thermal imaging unit and Hall sensor, detection is performed during the vehicle charging process, reducing the interference factors of the magnetic field, improving the charging efficiency of the battery, and ensuring the stability and safety of the vehicle wireless charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] This manual includes the following drawings, which show the following contents:

[0021] Figure 1 Schematic diagram of the receiving end of the wireless charging system for the new energy sweeper of the present invention;

[0022] Figure 2 is a schematic diagram of the ground platform and side wall platform of the present invention;

[0023] Figure 3 It is a schematic diagram of the installation of the receiving end of the present invention.

[0024] The following are marked in the figure: 1. Vehicle body; 2. Receiver; 3. Control system; 4. Composite positioning system; 5. Ground platform; 6. Side wall platform; 7. Transmitter; 8. Millimeter-wave radar; 9. Infrared thermal imaging unit; 10. Hall sensor; 11. Dynamic matching network; 12. Excitation coil; 13. Cloud management platform; 14. Safety protection unit; 15. Thermal management system. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0026] like Figures 1 to 3 As shown in the figure, the wireless charging system for a new energy sweeper includes a vehicle body 1 and a ground platform 5. A receiving terminal 2 is provided at the bottom of the vehicle body 1, and a transmitting terminal 7 is provided on the ground platform 5. A control system 3 and a composite positioning system 4 are provided on the receiving terminal 2, and a detection unit is provided on the ground platform 5. The transmitting terminal 7 includes a high-frequency inverter, a dynamic matching network 11, a transmitting coil, and an environmental sensor; the receiving terminal 2 includes an on-board resonance module, a frequency tracking module, and a safety protection unit 14. The control system 3 is an FPGA-based closed-loop controller that receives battery SOC and positioning data in real time. The detection unit ensures the safety of the vehicle's wireless charging by detecting environmental information.

[0027] like Figure 1 and Figure 2 As shown, the detection unit includes a millimeter-wave radar 8 and an infrared thermal imaging unit 9. Both the receiving end 2 and the ground platform 5 are equipped with a safety protection unit 14, and both the millimeter-wave radar 8 and the infrared thermal imaging unit 9 are electrically connected to the safety protection unit 14. The millimeter-wave radar 8 and the infrared thermal imaging unit 9 can detect living organisms in the charging area. Their simultaneous use improves detection accuracy. By determining the presence of nearby humans, they prevent human interference with the magnetic field stability, eliminate interference factors, and enhance the reliability and safety of the vehicle's wireless charging process.

[0028] like Figure 2 As shown, the detection unit further includes a Hall sensor 10, which is electrically connected to the transmitting terminal 7. The Hall sensor 10 monitors whether the magnetic field is distorted to determine whether there are foreign objects such as metal on the ground platform 5 that affect the stability of the magnetic field. If the magnetic field is distorted, an alarm is issued to remind personnel to check and remove the metal objects on the ground platform 5, thereby reducing interference factors in the magnetic field and ensuring smooth charging of the battery. If the Hall sensor 10 does not alarm, that is, there is no abnormality, then charging can be carried out.

[0029] like Figure 2As shown, a side wall platform 6 is provided on one side of the ground platform 5, on which a cloud management platform is installed. The ground platform 5 is also equipped with a dynamic matching network 11. The cloud management platform adjusts the frequency of the transmitter 7 in real time through the dynamic matching network 11 based on the specific location and number of sweepers parked in the designated area. The dynamic matching network 11 on the receiver 2 includes an adjustable capacitor matrix and a digital potentiometer. The closed-loop controller is configured to calculate the resonant frequency compensation in real time based on the battery SOC and magnetic field strength data.

[0030] like Figure 2 As shown, the transmitter 7 includes excitation coils 12, which are evenly distributed. Compared with traditional wireless charging, this improves the charging range and transmission distance, facilitates one-to-many charging, and reduces the requirements for device alignment, making it more flexible in application scenarios. Ferrite and conductive fabric can be placed around the receiving coil to reduce interference from external metal objects on the magnetic field.

[0031] like Figure 1 and Figure 2 As shown, both the receiving end 2 and the ground platform 5 are provided with a thermal management system 15 .

[0032] The wireless charging method for the new energy sweeper is implemented using the above-mentioned wireless charging system for the new energy sweeper, and includes the following steps: Step 1: The vehicle is parked in a designated charging area to detect vehicle location information and whether the battery meets charging conditions; Step 2: The millimeter wave radar 8 and the infrared thermal imaging unit 9 detect living body information in the charging area; The Hall sensor 10 monitors changes in the magnetic field; Step 3: The transmitting end 7 and the receiving end 2 start charging the vehicle.

[0033] In step 2, when a living target is detected for 2 seconds, the safety protection unit 14 cuts off the energy transmission; if no living information is detected, charging is performed.

[0034] In step 2, the Hall sensor 10 monitors whether the magnetic field is distorted. If the magnetic field is distorted, an alarm is issued. If there is no abnormality, charging is performed.

[0035] Here’s how it works:

[0036] 1. Park the sweeper in the designated charging area. The control system 3 confirms the specific location information of the sweeper and the battery state of charge (SOC) and battery health status based on the composite positioning system 4. The information is then communicated with the cloud management platform via the vehicle's CAN bus. If the charging conditions are not met, the control system 3 will issue a corresponding warning tone through the safety protection unit 14 to remind maintenance.

[0037] 2. After confirming the sweeper's location, battery SOC, and battery health, the transmitter 7 uses millimeter-wave radar 8 and infrared thermal imaging unit 9 to detect live objects in the charging area. If a live object is detected for two seconds, the safety protection unit 14 will cut off power transmission to ensure safety. If the detected live objects are normal, charging can proceed.

[0038] 3. Use the Hall sensor 10 to monitor whether the magnetic field is distorted and determine whether there are foreign objects such as metal. If the magnetic field is distorted, an alarm will be issued. If there is no abnormality, charging can be carried out.

[0039] 4. After steps 1-3 above are confirmed correct, the cloud management platform adjusts the frequency of transmitter 7 in real time through the dynamic matching network 11 based on the specific location and number of sweepers parked in the designated area. This prevents resonant mismatch and efficiency loss caused by vehicle parking offsets or load changes. This activates the distributed transmitter 7 multi-coil array group, which converts direct current into high-frequency alternating current, exciting coil 12 to generate an alternating magnetic field. The coil at receiver 2 induces magnetic field resonance and converts magnetic energy into current, which is then rectified and stabilized to charge the sweeper. The two circuits at transmitter 7 and receiver 2, operating at the same frequency, generate magnetic resonance, allowing energy to be transmitted efficiently over long distances through the alternating magnetic field.

[0040] This new energy sweeper wireless charging system and method sets a receiving end 2 on the chassis of the vehicle body 1, and cooperates with the use of a transmitting end 7 on the ground platform 5 to achieve unlimited charging of the vehicle. Through the use of millimeter wave radar 8, infrared thermal imaging unit 9 and Hall sensor 10, detection is performed during the vehicle charging process, reducing magnetic field interference factors, improving battery charging efficiency, and ensuring the stability and safety of vehicle wireless charging.

[0041] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. A new energy sweeper wireless charging system, characterized by: It includes a vehicle body and a ground platform. A receiving end is provided at the bottom of the vehicle body, a transmitting end is provided on the ground platform, a control system and a composite positioning system are provided on the receiving end, and a detection unit is provided on the ground platform.

2. The wireless charging system for a new energy sweeper according to claim 1, characterized in that: The detection unit includes a millimeter wave radar and an infrared thermal imaging unit. The receiving end and the ground platform are both provided with a safety protection unit. The millimeter wave radar and the infrared thermal imaging unit are both connected to the safety protection unit by electrical signals.

3. The wireless charging system for a new energy sweeper according to claim 2, characterized in that: The detection unit further includes a Hall sensor, which is electrically connected to the transmitting end.

4. The wireless charging system for a new energy sweeper according to claim 3 is characterized in that: A side wall platform is provided on one side of the ground platform, a cloud management platform is provided on the side wall platform, and a dynamic matching network is provided on the ground platform.

5. The wireless charging system for a new energy sweeper according to claim 4 is characterized in that: The transmitting end includes excitation coils, and the excitation coils are evenly distributed.

6. The wireless charging system for a new energy sweeper according to claim 5, characterized in that: The receiving end and the ground platform are both provided with a thermal management system.

7. A wireless charging method for a new energy sweeper, implemented using the wireless charging system for a new energy sweeper according to claim 6, characterized in that: The following steps are involved: Step 1: The vehicle is parked in the designated charging area to check the vehicle's location and battery conditions. Step 2: Millimeter-wave radar and infrared thermal imaging units detect living body information in the charging area; Hall sensors monitor magnetic field changes; Step 3: The transmitter and receiver start charging the vehicle.

8. The wireless charging method for a new energy sweeper according to claim 7, characterized in that: In step 2, when a living target is detected for 2 seconds, the safety protection unit cuts off energy transmission; if no living information is detected, charging is performed.

9. The wireless charging method for a new energy sweeper according to claim 8, characterized in that: In step 2, the Hall sensor monitors whether the magnetic field is distorted. If the magnetic field is distorted, an alarm is issued. If there is no abnormality, charging is performed.

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