A new energy vehicle dynamic wireless charging system based on an underground comprehensive pipe gallery

Abstract

The present application relates to the field of new energy vehicle wireless charging technology, and particularly relates to a new energy vehicle dynamic wireless charging system based on an underground comprehensive pipe gallery, which comprises a municipal power supply end, a wireless charging transmitting end, a vehicle-mounted wireless charging receiving end, a vehicle sensing end and a pipe gallery main body arranged along the road direction, the pipe gallery main body being located below the road surface of the road; the municipal power supply end is arranged in the inner cavity of the pipe gallery main body; the wireless charging transmitting end is arranged at the top of the inner cavity of the pipe gallery main body and close to the lower side of the road surface, the wireless charging transmitting end has a plurality of transmitting coils arranged in sequence along the road direction; the vehicle-mounted wireless charging receiving end is arranged on the vehicle chassis, the vehicle-mounted wireless charging receiving end forms a wireless charging loop with the transmitting coils through magnetic coupling resonance; the vehicle sensing end is arranged at the top of the inner cavity of the pipe gallery main body, and the vehicle sensing end is used for detecting the position of the vehicle and controlling the on-off of the corresponding transmitting coil. The present application can realize vehicle dynamic wireless charging without occupying the road surface and can be operated stably for a long time.

Description

Technical Field

[0001] This invention relates to the field of wireless charging technology for new energy vehicles, and in particular to a dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels. Background Technology

[0002] Currently, new energy vehicle charging modes are mainly divided into three categories: static wired charging, static wireless charging, and dynamic wireless charging on the road surface. Static wired charging requires charging piles, which occupy space. Urban land resources are scarce, and the selection and construction of charging facilities are difficult. Furthermore, exposed cables are prone to aging and pose safety hazards. Static wireless charging requires vehicles to be parked at fixed locations and occupy charging spaces for extended periods, completely consuming users' travel time and parking space turnaround time. Charging cannot be performed while the vehicle is in motion, severely impacting travel efficiency. Dynamic wireless charging on the road surface involves laying the charging transmitting coil, power cables, and control modules directly on the road surface or beside the road. The equipment is subject to long-term exposure to vehicle traffic, rainwater immersion, and temperature changes, resulting in a high failure rate and short lifespan. Moreover, maintenance requires repeated road excavation, damaging road conditions, disrupting traffic, and incurring extremely high costs. Summary of the Invention

[0003] To overcome the above problems, the purpose of this invention is to provide a dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels, which can provide dynamic wireless charging for vehicles without occupying road surface and can operate stably for a long time.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels, comprising: The main body of the utility tunnel is set along the road direction and is located below the road surface; Municipal power supply terminal, which is located inside the main body of the utility tunnel; A wireless charging transmitter is disposed at the top of the inner cavity of the main body of the utility tunnel and on the lower side near the road surface. The wireless charging transmitter has multiple transmitting coils arranged sequentially along the road direction. The vehicle-mounted wireless charging receiver is mounted on the vehicle chassis and forms a wireless charging circuit with the transmitting coil through magnetic coupling resonance. The vehicle sensing terminal is located at the top of the inner cavity of the main body of the pipe gallery. The vehicle sensing terminal is used to detect the vehicle position and control the on / off state of the corresponding transmitting coil.

[0005] Furthermore, the vehicle sensing terminal includes a controller and electromagnetic sensors and radars arranged on the sides of each transmitting coil, the electromagnetic sensors and radars being communicatively connected to the controller.

[0006] Furthermore, the vehicle sensing terminal also includes a current sensor for detecting the load current of the transmitting coil, and the current sensor is communicatively connected to the controller.

[0007] Furthermore, the length of the transmitting coil along the road direction is 8m to 12m, and the operating resonant frequency of the transmitting coil is 79kHz to 90kHz.

[0008] Furthermore, the wireless charging transmitter also includes a frequency conversion power supply and a resonant compensation capacitor; The input terminal of the frequency converter power supply is electrically connected to the municipal power supply terminal, and is used to convert the power frequency AC power input from the municipal power grid into high frequency AC power and output it to the transmitting coil. The resonant compensation capacitor is connected in series or in parallel in the input circuit of the transmitting coil. The resonant compensation capacitor and the transmitting coil together form an LC resonant circuit. The resonant frequency of the LC resonant circuit matches the output frequency of the frequency converter transmitting power supply, so that the transmitting coil works in a resonant state.

[0009] Furthermore, the vehicle-mounted wireless charging receiver includes a magnetically coupled receiving coil, a rectifier and filter module, a voltage regulator module, and an on-board charging management unit. The magnetically coupled receiving coil is mounted on the vehicle chassis. The input terminal of the rectifier and filter module is electrically connected to the output terminal of the magnetically coupled receiving coil. The input terminal of the voltage regulator module is electrically connected to the output terminal of the rectifier and filter module. The input terminal of the on-board charging management unit is electrically connected to the output terminal of the voltage regulator module. The on-board charging management unit is communicatively connected to the vehicle's battery management system.

[0010] Furthermore, the main body of the utility tunnel is a reinforced concrete structure.

[0011] Furthermore, the aforementioned dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels also includes a client. The municipal power supply terminal includes a current sensor, a voltage sensor, a temperature sensor, and a remote transmission module. The current sensor is used to monitor the current status of each transmitting coil, the voltage sensor is used to monitor the voltage status of each transmitting coil, and the temperature sensor is used to monitor the temperature status of each transmitting coil. The current sensor, voltage sensor, and temperature sensor are all communicatively connected to the remote transmission module, which is communicatively connected to the client.

[0012] Furthermore, the municipal power supply terminal also includes a power distribution cabinet, which is communicatively connected to the remote transmission module and is used to supply power to the transmitting coil.

[0013] The beneficial effects of this invention are as follows: By integrating the wireless charging transmitter, municipal power supply, and vehicle sensing terminal into the main body of the utility tunnel beneath the road, not only are core components such as the transmitting coil protected from vehicle crushing, rainwater immersion, and extreme temperature changes, reducing equipment failure rates and extending service life, but also, by utilizing the vehicle-mounted wireless charging receiver added to the vehicle chassis to form a wireless charging circuit with the transmitting coil through magnetic coupling resonance, vehicles can dynamically replenish energy while driving, eliminating the need for fixed-point parking or long-term occupation of parking spaces, thereby freeing up users' travel time and significantly improving parking space turnover efficiency; at the same time, the vehicle sensing terminal can detect the vehicle's position in real time and accurately control the on / off state of the corresponding transmitting coil, ensuring a continuous and reliable dynamic charging process. Attached Figure Description

[0014] Figure 1 This is a system diagram of a dynamic wireless charging system for new energy vehicles based on an underground integrated utility tunnel, as proposed in this invention. Figure 2 This is a schematic diagram of the layout structure of a dynamic wireless charging system for new energy vehicles based on an underground integrated pipe gallery, as proposed in this invention. Label Explanation: 1. Main structure of the utility tunnel; 2. Municipal power supply terminal; 21. Second current sensor; 22. Voltage sensor; 23. Temperature sensor; 24. Remote transmission module; 25. Distribution cabinet; 3. Wireless charging transmitter; 31. Transmitting coil; 32. Variable frequency transmitting power supply; 33. Resonant compensation capacitor; 4. Vehicle-mounted wireless charging receiver; 41. Magnetic coupling receiving coil; 42. Rectifier and filter module; 43. Voltage regulation module; 44. Vehicle-mounted charging management unit; 5. Vehicle sensing terminal; 51. Controller; 52. Electromagnetic sensor; 53. Radar; 54. First current sensor; 6. Client-side application. Detailed Implementation

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Please refer to Figure 1 and Figure 2As shown, this invention discloses a dynamic wireless charging system for new energy vehicles based on an underground integrated utility tunnel. The system includes a municipal power supply terminal 2, a wireless charging transmitter 3, a vehicle-mounted wireless charging receiver 4, a vehicle sensing terminal 5, and a utility tunnel body 1 arranged along a road surface. The utility tunnel body 1 is located below the road surface. The municipal power supply terminal 2 is located within the cavity of the utility tunnel body 1. The wireless charging transmitter 3 is located at the top of the cavity of the utility tunnel body 1 and near the lower side of the road surface, and has multiple transmitting coils 31 arranged sequentially along the road surface. The vehicle-mounted wireless charging receiver 4 is mounted on the vehicle chassis and forms a wireless charging circuit with the transmitting coils 31 through magnetic coupling resonance. The vehicle sensing terminal 5 is located at the top of the cavity of the utility tunnel body 1 and is used to detect the vehicle's position and control the corresponding transmitting coil 31 to switch on and off.

[0017] Working principle: By integrating the wireless charging transmitter 3, the municipal power supply terminal 2, and the vehicle sensing terminal 5 into the main body 1 of the utility tunnel under the road, not only are core components such as the transmitting coil 31 protected from vehicle crushing, rain immersion, and extreme temperature changes, reducing equipment failure rate and extending service life, but also, with the help of the vehicle-mounted wireless charging receiver 4 added to the vehicle chassis, a wireless charging circuit is formed with the transmitting coil 31 through magnetic coupling resonance, allowing the vehicle to dynamically replenish energy while driving, without the need for fixed parking or long-term occupation of parking spaces, thereby freeing up users' travel time and significantly improving parking space turnover efficiency; at the same time, the vehicle sensing terminal can detect the vehicle's position in real time and accurately control the on / off of the corresponding transmitting coil to ensure the continuous and reliable dynamic charging process.

[0018] In some implementations, please refer to Figure 1 As shown, the vehicle sensing terminal 5 includes a controller 51 and electromagnetic sensors 52 and radar 53 arranged on the sides of each transmitting coil 31. The electromagnetic sensors 52 and radar 53 are communicatively connected to the controller 51. During dynamic charging, the electromagnetic sensors and radar detect the vehicle's driving position and speed in real time and transmit the data to the controller instantly. This allows the system to determine which segment of the transmitting coil 31 is within the effective coverage area, thereby controlling the on / off state of the corresponding transmitting coil 31 as needed.

[0019] In some implementations, please refer to Figure 1 As shown, the vehicle sensing terminal 5 also includes a first current sensor 54 for detecting the load current of the transmitting coil 31. The first current sensor 54 is communicatively connected to the controller 51. By monitoring the load current change of the transmitting coil 31 in real time through the first current sensor 54 and feeding back the detection signal to the controller 51, the system can determine which segment of the transmitting coil 31 is within the effective coverage range of the vehicle, thereby controlling the on / off state of the corresponding transmitting coil 31 as needed.

[0020] Specifically, when the vehicle is located in the central area of ​​transmitting coil A 31, the input current of transmitting coil A 31 is 100A, which is a state of strong coupling. When the vehicle moves away from transmitting coil A 31 and approaches transmitting coil B 31, the input current of transmitting coil A 31 is 60A, which is a state of weak coupling. A switching threshold can be set for controller 51. For example, when the input current of transmitting coil 31 is 65A, controller 51 can send a "soft start" command to transmitting coil B 31 and prepare to "soft turn off" transmitting coil A 31, thereby achieving adaptive switching.

[0021] In some embodiments, the length of the transmitting coil 31 along the road direction is 8m to 12m, and the operating resonant frequency of the transmitting coil 31 is 79kHz to 90kHz. The length of the transmitting coil 31 along the road direction and the operating resonant frequency are limited to adapt to dynamic charging conditions at normal vehicle speeds on urban roads.

[0022] In some implementations, please refer to Figure 1 As shown, the wireless charging transmitter 3 also includes a frequency converter power supply 32 and a resonant compensation capacitor 33. The input terminal of the frequency converter power supply 32 is electrically connected to the municipal power supply terminal 2, and is used to convert the power frequency AC power input from the municipal power grid into high-frequency AC power, which is then output to the transmitting coil 31. The resonant compensation capacitor 33 is connected in series or in parallel in the input circuit of the transmitting coil 31. The resonant compensation capacitor 33 and the transmitting coil 31 together form an LC resonant circuit. The resonant frequency of the LC resonant circuit matches the output frequency of the frequency converter power supply 32, so that the transmitting coil 31 operates in a resonant state. By using the frequency converter power supply 32 to convert the municipal power frequency into high-frequency AC power to supply the transmitting coil 31, the wireless power transmission frequency can be effectively improved. At the same time, the resonant compensation capacitor 33 and the transmitting coil 31 form an LC resonant circuit, and its resonant frequency matches the output frequency of the frequency converter power supply 32, so that the transmitting coil 31 always operates in a resonant state. This resonant operating mode can cancel the coil inductive reactance, reduce the reactive power of the circuit, improve the power factor, make full use of the power supply capacity, reduce the current stress of the switching devices, reduce the internal losses of the system, and thus improve the overall power transmission efficiency. In addition, the magnetic coupling resonant mode has strong tolerance to the relative position displacement of the coil, which is conducive to maintaining stable energy coupling during vehicle dynamic driving. The frequency adjustable characteristic of the variable frequency transmitting power supply 32 enables the system to flexibly adjust the operating frequency according to load changes and vehicle speed fluctuations, further optimize transmission performance, enhance adaptability to complex urban road conditions, and ensure that the dynamic wireless charging process is continuous, efficient and reliable.

[0023] In some implementations, please refer to Figure 1As shown, the vehicle-mounted wireless charging receiver 4 includes a magnetically coupled receiving coil 41, a rectifier and filter module 42, a voltage regulator module 43, and an on-board charging management unit 44. The magnetically coupled receiving coil 41 is mounted on the vehicle chassis. The input terminal of the rectifier and filter module 42 is electrically connected to the output terminal of the magnetically coupled receiving coil 41. The input terminal of the voltage regulator module 43 is electrically connected to the output terminal of the rectifier and filter module 42. The input terminal of the on-board charging management unit 44 is electrically connected to the output terminal of the voltage regulator module 43. The on-board charging management unit 44 communicates with the vehicle's battery management system (BMS). The magnetically coupled receiving coil 41 picks up high-frequency electrical energy from the road surface transmitter. The rectifier and filter module 42 converts the high-frequency AC power into stable DC power. The voltage regulator module 43 then outputs a stable voltage that meets the requirements of the vehicle's battery system. The on-board charging management unit 44 communicates with the battery management system (BMS) in real time to control the charging current and voltage parameters, achieving safe, efficient, and adaptive charging during dynamic driving.

[0024] In some embodiments, the main body 1 of the utility tunnel is made of reinforced concrete, which not only has excellent compressive strength and long-term durability, but also can reliably withstand road loads and environmental erosion, providing solid physical protection for internal equipment. At the same time, by reasonably setting the spacing of the reinforcing bars, the thickness of the concrete and the dielectric properties, the shielding or eddy current loss of the electromagnetic field is effectively avoided, ensuring that the magnetic field signal generated by the transmitting coil can penetrate the road structure layer vertically with low attenuation, and form a continuous and uniform wireless power supply coverage area within the ground lane range. This enables uninterrupted dynamic charging of vehicles, ensuring that vehicles in each lane can stably obtain power, and fully improving the practicality and coverage of the system.

[0025] In some implementations, please refer to Figure 1 As shown, the aforementioned dynamic wireless charging system for new energy vehicles based on an underground integrated utility tunnel also includes a client 6. The municipal power supply terminal 2 includes a second current sensor 21, a voltage sensor 22, a temperature sensor 23, and a remote transmission module 24. The second current sensor 21 is used to monitor the current status of each transmitting coil 31, the voltage sensor 22 is used to monitor the voltage status of each transmitting coil 31, and the temperature sensor 23 is used to monitor the temperature status of each transmitting coil 31. The second current sensor 21, voltage sensor 22, and temperature sensor 23 are all communicatively connected to the remote transmission module 24, which is communicatively connected to the client 6. The second current sensor 21, voltage sensor 22, and temperature sensor 23 are used to monitor the current, voltage, and temperature status of the transmitting coil 31 in real time, and the data is remotely transmitted to the client 6 via the remote transmission module 24, achieving remote monitoring.

[0026] It is worth noting that the second current sensor 21 and the first current sensor 54 can be the same sensor, and the detected current is transmitted to the controller 51 and the remote transmission module 24 respectively.

[0027] In some implementations, please refer to Figure 1 As shown, the municipal power supply terminal 2 also includes a distribution cabinet 25, which is communicatively connected to the remote transmission module 24. The distribution cabinet 25 is used to supply power to the transmitting coil 31. When the transmitting coil 31 is detected as abnormal by the second current sensor 21, voltage sensor 22, and temperature sensor 23, the client 6 can send a control command to the distribution cabinet 25 through the remote transmission module 24 to shut down the corresponding transmitting coil 31.

[0028] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included in the scope of the present invention.

Claims

1. A dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels, comprising: The main body (1) of the utility tunnel is set along the road direction and is located below the road surface; Municipal power supply terminal (2), wherein the municipal power supply terminal (2) is installed in the inner cavity of the main body (1) of the utility tunnel; The wireless charging transmitter (3) is located at the top of the inner cavity of the main body of the pipe gallery (1) and on the lower side near the road surface. The wireless charging transmitter (3) has multiple transmitting coils (31) arranged sequentially along the road direction. The vehicle-mounted wireless charging receiver (4) is installed on the vehicle chassis. The vehicle-mounted wireless charging receiver (4) forms a wireless charging circuit with the transmitting coil (31) through magnetic coupling resonance. The vehicle sensing terminal (5) is located at the top of the inner cavity of the main body (1) of the pipe gallery. The vehicle sensing terminal (5) is used to detect the vehicle position and control the corresponding transmitting coil (31) to switch on and off.

2. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 1, characterized in that: The vehicle sensing terminal (5) includes a controller (51) and electromagnetic sensors (52) and radar (53) arranged on the side of each transmitting coil (31). The electromagnetic sensors (52) and radar (53) are respectively connected to the controller (51) for communication.

3. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 2, characterized in that: The vehicle sensing terminal (5) also includes a first current sensor (54) for detecting the load current of the transmitting coil (31), and the first current sensor (54) is communicatively connected to the controller (51).

4. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 1, characterized in that: The length of the transmitting coil (31) along the direction of the road is 8m to 12m, and the operating resonant frequency of the transmitting coil (31) is 79kHz to 90kHz.

5. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 1, characterized in that: The wireless charging transmitter (3) also includes a frequency conversion transmitting power supply (32) and a resonant compensation capacitor (33). The input terminal of the frequency converter transmitting power supply (32) is electrically connected to the municipal power supply terminal (2) to convert the power frequency AC power input from the municipal power grid into high frequency AC power and output it to the transmitting coil (31). The resonant compensation capacitor (33) is connected in series or in parallel in the input circuit of the transmitting coil (31). The resonant compensation capacitor (33) and the transmitting coil (31) together form an LC resonant circuit. The resonant frequency of the LC resonant circuit matches the output frequency of the frequency converter transmitting power supply (32), so that the transmitting coil (31) works in a resonant state.

6. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 1, characterized in that: The vehicle-mounted wireless charging receiver (4) includes a magnetic coupling receiving coil (41), a rectifier and filter module (42), a voltage regulation module (43), and a vehicle-mounted charging management unit (44). The magnetic coupling receiving coil (41) is mounted on the vehicle chassis. The input terminal of the rectifier and filter module (42) is electrically connected to the output terminal of the magnetic coupling receiving coil (41). The input terminal of the voltage regulation module (43) is electrically connected to the output terminal of the rectifier and filter module (42). The input terminal of the vehicle-mounted charging management unit (44) is electrically connected to the output terminal of the voltage regulation module (43). The vehicle-mounted charging management unit (44) is communicatively connected to the vehicle's battery management system.

7. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 1, characterized in that: The main body of the utility tunnel (1) is a reinforced concrete structure.

8. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 1, characterized in that: It also includes a client (6). The municipal power supply terminal (2) includes a second current sensor (21), a voltage sensor (22), a temperature sensor (23), and a remote transmission module (24). The second current sensor (21) is used to monitor the current status of each transmitting coil (31), the voltage sensor (22) is used to monitor the voltage status of each transmitting coil (31), and the temperature sensor (23) is used to monitor the temperature status of each transmitting coil (31). The second current sensor (21), the voltage sensor (22), and the temperature sensor (23) are all connected to the remote transmission module (24), and the remote transmission module (24) is connected to the client (6).

9. The dynamic wireless charging system for new energy vehicles based on underground integrated utility tunnels according to claim 8, characterized in that: The municipal power supply terminal (2) also includes a power distribution cabinet (25), which is connected to the remote transmission module (24) for communication. The power distribution cabinet (25) is used to supply power to the transmitting coil (31).

Images