A wireless charging car for new energy vehicles and its charging demodulation system

Abstract

The present invention provides a wireless charging trolley for new energy vehicles and a charging demodulation system thereof, belonging to the field of wireless charging technology, comprising a vehicle body, an omnidirectional mobile chassis rotatably arranged at the bottom of the vehicle body, a universal wheel uniformly arranged at the bottom of the omnidirectional mobile chassis in the circumferential direction, a coil outer cover arranged at the lifting end of a lifting mechanism, a groove wheel rotatably arranged at the bottom of an inner cavity of the coil outer cover, a roller slidably arranged at the bottom of the inner cavity of the coil outer cover, a signal is transmitted to the groove wheel according to the coupling of magnetic flux lines where the coil is located, so that the groove wheel rotates, and as the groove wheel rotates, the roller is forced to slide in the through groove, and the moving roller drives the hinged connecting rod to move, so that the other end of the connecting rod drives the hinged receiving piece to diffuse circumferentially, thereby adjusting the area of ​​the transmitting end coil, and by adjusting the expansion and contraction of the diameter of the transmitting end coil, the coupling capacity between the wireless charging coils is improved, thereby improving the charging efficiency of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of wireless charging technology, and in particular to a wireless charging vehicle for a new energy vehicle and a charging demodulation system thereof. Background Art

[0002] In order to achieve the goals of carbon peak and carbon neutrality, electric vehicles have made great progress in recent years. However, the driving range of electric vehicles is still an important factor hindering their promotion and popularization. In the absence of substantial breakthroughs in electric vehicle battery technology, the first step to overcome the obstacle of electric vehicle driving range is to solve the problem of electric vehicle charging. The charging piles currently widely used are greatly affected by the environment due to their exposed charging plugs, and there are problems such as long-term dust accumulation, easy leakage in rainy and snowy weather, and high subsequent maintenance costs; wireless charging has become one of the important development trends in the field of electric vehicle charging technology in the future due to its unique advantages such as high reliability and safety, convenience and ease of use, high space utilization, and easy maintenance.

[0003] Although wireless charging technology for new energy vehicles has made great progress, there is a common "pain point" in reality, that is, the wireless charging transmitter is only fixed at a point in the middle of the garage. When the driver drives the car into the garage, the parking position is slightly deviated, and the wireless charging transmitter on the ground and the receiver on the car are slightly misaligned (the error between the two center points exceeds 3cm), and the charging efficiency is sharply reduced.

[0004] In the above disclosed technical solutions, the following problems are found in the related technologies: the existing solution is to align the transmitter and the receiver through manual calibration. However, this takes a lot of time, and the calibration accuracy is low, making it difficult to align completely. In addition, the height of the current wireless charging transmitter is mostly fixed, and wireless charging requires that the distance between the transmitter and the receiver be small enough to improve the charging efficiency. The fixed height of the transmitter cannot adapt to the different chassis heights of different models, and the charging efficiency is limited. For this reason, we consider using an omnidirectional mobile car to autonomously align the transmitter and the receiver. At the same time, the car is equipped with a lifting module to actively adjust the vertical distance between the transmitter and the receiver. For this reason, we propose a new type of wireless charging car for new energy vehicles.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. In order to solve the problem of low automobile charging efficiency in the above-mentioned prior art, the present invention provides a wireless charging trolley for new energy vehicles and a charging demodulation system thereof, which adopts a transmitting end and a receiving end alignment structure combined with a lifting structure to achieve the effect of improving automobile charging efficiency. Its specific technical solution is:

[0007] A wireless charging trolley for new energy vehicles comprises a vehicle body, an omnidirectional mobile chassis is rotatably provided at the bottom of the vehicle body, universal wheels are evenly provided at the bottom circumferentially of the omnidirectional mobile chassis, a lifting mechanism is provided at the top of the vehicle body, a coil cover is provided at the lifting end of the lifting mechanism, a groove wheel is rotatably provided at the bottom of the inner cavity of the coil cover, through grooves are evenly provided at the top of the groove wheel, a roller is embedded in the inner cavity of the through groove, and the roller is slidably provided at the bottom of the inner cavity of the coil cover, one end of a connecting rod is rotatably provided on the roller, the other end of the connecting rod is rotatably connected to a sheet collecting piece, and a transmitting end coil is sleeved on the outer circumference of the sheet collecting piece.

[0008] In the above technical solution, the lifting mechanism includes a screw rotatably arranged on the top of the vehicle body, the external thread of the screw is connected to an adjustment seat, a scissors frame is arranged between the coil outer cover and the vehicle body, a transmission rod is penetrated through the adjustment seat, and the end of the transmission rod is hinged to a support rod of the scissors frame.

[0009] The transmission rod is slidably arranged at the bottom of the inner cavity of the vehicle body through a directional assembly.

[0010] The directional assembly comprises a slide groove opened on the top of the vehicle body, a slide rod is embedded and installed in the inner cavity of the slide groove, a slide seat is sleeved on the outside of the slide rod, and the slide seat is connected to the transmission rod.

[0011] A wiring hole is provided at the bottom of the vehicle body.

[0012] A partition for separating the transmitting end coil is arranged on the top of the inner cavity of the vehicle body, and the partition is a 3D printed part made of PLA material.

[0013] A magnetic pole layer is embedded in the partition.

[0014] The transmitting end coil is wired through a directional bracket embedded in the inner cavity of the vehicle body.

[0015] A wire winding seat is fixedly connected to the circumferential outer wall of the sheet collecting member, and wire winding spacers are evenly arranged on the top of the wire winding seat toward the outside.

[0016] A charging demodulation system for a wireless charging car of a new energy vehicle includes:

[0017] S1: The communication control module at the transmitter end of the transformer controls the signal at the transmitter end. The communication control module transmits the PWM control signal through the single-chip microcomputer or FPGA controller. When the PWM control signal is expressed as 0, the signal at the transmitter end is multiplied by the cosine wave with a phase of 0 and then transmitted. At this time, the output waveform phase is 0;

[0018] S2: When the PWM control signal is 1, the signal at the transmitting end is multiplied by the cosine wave after phase shift \pi and then transmitted. The phase of the output waveform is now \pi, which is opposite to the former, that is, information is transmitted using phase difference;

[0019] S3: demodulate the signals of different phases transmitted to the receiving end, the induced voltage signal of the receiving end is first transmitted through a bandpass filter to filter noise, and then the signal is delayed for one cycle through a delay circuit, and the delayed signal and the original signal are connected to a multiplication circuit, that is, a comparison and judgment of the signal waveforms under different phases is performed, and the output signal is then input into a low-pass filter;

[0020] S4: The signal obtained from the low-pass filter is sampled and determined by the sampling decision device, and finally the demodulation is completed;

[0021] S5: Amplitude modulation is performed at the receiving end; the receiving end circuit signal first passes through a bridge full-wave rectifier circuit, and then a switch circuit is added after the bridge rectifier circuit, which is composed of a switch and a capacitor. The switch is switched through the communication control module of the receiving end. When the PWM control signal output by the single-chip microcomputer in the control module is 1, the switch is turned on, and when the output is 0, the switch is turned off. The part composed of the switch and the capacitor is connected in parallel with the inductor coil and in series with the rectifier circuit;

[0022] S6: Demodulation is performed at the transmitting end. During transmission, the switch on and off at the receiving end will cause the total impedance of the receiving end to change, thereby causing the current and voltage at the receiving end, as well as the current and voltage at the transmitting end to change. A capacitor in the transmitting end loop is used as a reader / writer, and the voltage across the capacitor will change in amplitude. The switch on and off corresponds to two different amplitudes, corresponding to 0 and 1 respectively, thus completing the demodulation.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the wireless charging vehicle for new energy vehicles and its charging demodulation system:

[0024] 1. The charging car adopts a resonant wireless charging demodulation system for wireless charging of cars. The charging part is used as a transmitting source to excite the induction coil by the oscillation circuit to generate an alternating magnetic field. The induction coil with the same resonant frequency inside the car generates magnetic resonance on the receiving winding in the magnetic field, and continuously gathers energy in the receiving device and provides it to the car. However, the car and the receiving coil are at different positions and height distances, which will affect the direct coupling coefficient of the coil. The variable diameter coil is used to adjust the coil diameter, adjust the inductance, improve the coupling ability, and thus improve the charging efficiency.

[0025] 2. When the car is wirelessly charged, the car body is moved to the receiving end of the wireless coil of the car through the universal wheels at the bottom of the omnidirectional mobile chassis, and then the signal is transmitted to the groove wheel according to the coupling of the magnetic flux lines where the coil is located, so that the groove wheel rotates. As the groove wheel rotates, the roller is forced to slide in the through groove, and the moving roller drives the hinged connecting rod to move, so that the other end of the connecting rod drives the hinged receiving piece to diffuse circumferentially, thereby adjusting the area of ​​the transmitting end coil. By adjusting the expansion and reduction of the diameter of the transmitting end coil, the coupling ability between the wireless charging coils is improved, thereby improving the charging efficiency of the car.

[0026] 3. When the vehicle body is moved to a position corresponding to the position of the car, the coupling between the wireless charging coils causes the adjustment seat connected to the external thread of the lead screw to drive the transmission rod to move, and the transmission rod drives a support rod of the hinged scissors frame to move, so that the scissors frame is folded horizontally, thereby adjusting the distance between the transmitting coil and the receiving coil on the car, transmitting the signal to the lead screw according to the coupling between the coils, and adjusting the distance between the transmitting coil and the receiving coil of the car by rotating the lead screw, thereby improving the coupling capacity between the wireless charging coils, thereby improving the charging efficiency of the car.

[0027] 4. In the process of driving the transmission rod to move, the transmission rod drives the slide seat to slide against the outside of the slide rod. The sliding cooperation between the slide seat and the slide rod ensures the stability of the movement direction of the transmission rod and avoids position deviation, thereby ensuring the accuracy of the transmitter coil position adjustment.

[0028] 5. Try to move in all directions under the drive of the omnidirectional mobile chassis. Because the magnetic pole layer is fixed inside, it will spontaneously generate a magnetic field. When it passes through the receiving coil under the car, the coil cuts the magnetic flux to generate current, and the car body receives the signal. The receiving coil is accurately positioned by the strength of the induction signal. After positioning, the lead screw rotates to drive the magnetic pole layer up and down, and the magnetic flux through the coil changes, generating an electromotive force and transmitting a signal. The appropriate distance is determined by the strength of the induction signal.

[0029] 6. The motor drives the universal wheel to rotate, so that the vehicle body moves toward the wireless receiving coil part of the car. During the movement, the moving direction of the vehicle body is adjusted by rotating the omnidirectional mobile chassis, thereby ensuring the accuracy of the moving direction of the vehicle body.

[0030] 7. In order to realize the signal transmission between the wireless charging car and the new energy vehicle, an innovative signal demodulation method is designed, which uses the coil to transmit signals while wirelessly powering to achieve communication between the two. It can better realize the alignment of the wireless charging transmitter and receiver coils, and transmit signals to the car when the vehicle is fully charged, automatically cutting off the power to reduce the damage to the battery caused by overcharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of a wireless charging vehicle for a new energy vehicle of the present invention;

[0032] Figure 2 This is a schematic diagram of the side structure of a wireless charging vehicle for a new energy vehicle of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure explosion of a wireless charging vehicle for a new energy vehicle of the present invention;

[0034] Figure 4 It is a schematic diagram of the structure explosion of the coil outer cover part of the present invention;

[0035] Figure 5 It is a schematic diagram of the explosion structure of the vehicle body part of the present invention;

[0036] Figure 6 for Figure 4 A local enlarged view of point A;

[0037] Figure 7 This is a flow chart of the charging demodulation system of the present invention;

[0038] in, Figures 1 to 7 The correspondence between the figure numbers and the component names is: 1-car body, 2-omnidirectional mobile chassis, 3-lifting mechanism, 31-screw, 32-adjusting seat, 33-scissors frame, 34-transmission rod, 35-fixed seat, 36-connecting frame, 4-groove wheel, 41-through groove, 42-roller, 43-connecting rod, 44-receiving piece, 45-transmitting end coil, 46-limiting groove, 5-directional component, 51-slide groove, 52-slide rod, 53-slide seat, 6-coil cover, 7-directional bracket, 71-lead ring, 8-winding seat, 81-winding spacer, 9-universal wheel, 10-wiring hole, 11-partition, 12-magnetic pole layer. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The following is a combination of specific implementation cases and attached Figure 1 -Attached Figure 7 The present invention is further described below, but the present invention is not limited to these embodiments.

[0041] A wireless charging trolley for new energy vehicles includes a body 1, an omnidirectional mobile chassis 2 is rotatably arranged at the bottom of the body 1, and universal wheels 9 are evenly arranged at the bottom of the omnidirectional mobile chassis 2. A motor is fixedly installed at the bottom of the inner cavity of the body 1, and the output shaft of the motor passes through the bottom of the body 1 and extends to the outside. The omnidirectional mobile chassis 2 is fixedly sleeved on the outside of the motor output shaft through a mounting hole opened in the center, and the motor is electrically connected to a battery built into the body 1 through a wire.

[0042] Each universal wheel 9 has a separate driving member, which can be a motor. The motor drives the universal wheel 9 to rotate, so that the vehicle body 1 moves toward the wireless receiving coil part of the car. During the movement, the moving direction of the vehicle body 1 is adjusted by rotating the omnidirectional mobile chassis 2, thereby ensuring the accuracy of the moving direction of the vehicle body 1. The omnidirectional mobile chassis 2 is composed of three axes of a support seat fixed between two layers of aluminum plates, which are 120 degrees to each other and intersect at the center of the robot. The McLennan is driven by a DJI 2006 brushless motor, which can accurately control its rotation speed and direction, and read its rotation angle to accurately control the movement of the car. The two layers of aluminum plates are separated by a surrounding arc-shaped support seat, and the interior is hollow.

[0043] A lifting mechanism 3 is provided on the top of the vehicle body 1, and a coil cover 6 is provided on the lifting end of the lifting mechanism 3, and a groove wheel 4 is rotatably provided at the bottom of the inner cavity of the coil cover 6. The lifting end of the lifting mechanism 3 is fixedly installed with the coil cover 6, and a motor is fixedly installed at the bottom of the inner cavity of the coil cover 6 through a machine cover. The groove wheel 4 is fixedly sleeved on the outside of the motor output shaft through a mounting hole opened in the center. The motor is electrically connected to the battery on the vehicle body 1, so that the output shaft of the motor drives the groove wheel 4 to rotate. Through grooves 41 are evenly provided on the top of the groove wheel 4, and a roller 42 is embedded in the inner cavity of the through groove 41, and the roller 42 is slidably provided at the bottom of the inner cavity of the coil cover 6.

[0044] A limiting groove 46 is provided on the bottom of the inner cavity of the coil outer cover 6, each limiting groove 46 is inclined relative to each through groove 41, and the limiting groove 46 is inclined toward the edge of the groove wheel 4. A limiting block is fixed to the bottom of the roller 42, and the limiting block slides on the inner wall of the limiting groove 46. At the same time, the roller 42 slides on the inner wall of the through groove 41.

[0045] One end of a connecting rod 43 is rotatably provided on the roller 42, and the other end of the connecting rod 43 is rotatably connected to a receiving piece 44, and a transmitting end coil 45 is sleeved on the outer periphery of the receiving piece 44. The electromagnetic wire of the transmitting end coil 45 is wound around the outside of the six receiving pieces 44 with a gap in the circumferential direction, and each receiving piece 44 is provided with a winding seat 8 for circumferentially limiting the electromagnetic wire, which is hinged to one end of the connecting rod 43 through a rotating shaft on the surface of the roller 42, and the other end of the connecting rod 43 is hinged to the receiving piece 44 through a rotating shaft. The receiving piece 44 is an arc-shaped plate, and the arc-shaped receiving pieces 44 are circumferentially distributed with the same center, so that the electromagnetic wire of the transmitting end coil 45 has a space for winding around the outside of the six circumferential receiving pieces 44.

[0046] When wireless charging is performed on a car, the car body 1 is moved to the wireless coil receiving end of the car through the universal wheel 9 at the bottom of the omnidirectional mobile chassis 2. Then, according to the coupling of the magnetic flux lines where the coil is located, the signal is transmitted to the groove wheel 4, so that the groove wheel 4 rotates, and as the groove wheel 4 rotates, the roller 42 is forced to slide in the through groove 41. The moving roller 42 drives the hinged connecting rod 43 to move, so that the other end of the connecting rod 43 drives the hinged receiving member 44 to spread circumferentially, thereby adjusting the area of ​​the transmitting end coil 45.

[0047] With the above structure, the coupling capability between the wireless charging coils is improved by adjusting the diameter of the transmitting end coil 45 to increase or decrease, thereby improving the charging efficiency of the vehicle.

[0048] The lifting mechanism 3 includes a lead screw 31 rotatably arranged on the top of the vehicle body 1. Two mutually parallel fixing seats 35 are vertically fixedly installed on the top of the vehicle body 1, and bearings are embedded and installed on the opposite surfaces of the two fixing seats 35. The two ends of the lead screw 31 are respectively embedded and installed inside the two fixing seats 35, and a motor is fixedly installed on the top of the vehicle body 1. The output shaft of the motor passes through the inner cavity of a corresponding fixing seat 35 and is fixedly connected to one end of the lead screw 31.

[0049] The external thread of the lead screw 31 is connected to the adjustment seat 32, and a scissor frame 33 is provided between the coil cover 6 and the vehicle body 1. The upper and lower ends of the scissor frame 33 slide symmetrically on two connecting frames 36, and the two connecting frames 36 are respectively fixed on the opposite surfaces of the vehicle body 1 and the coil cover 6. A transmission rod 34 is provided through the adjustment seat 32, and the end of the transmission rod 34 is hinged to a support rod of the scissor frame 33.

[0050] When the vehicle body 1 is moved to a position corresponding to the position of the car, the driving motor of the screw 31 is connected to a power source, so that the screw 31 rotates, and the adjustment seat 32 connected to the external thread of the screw 31 drives the transmission rod 34 to move, so that the transmission rod 34 drives a support rod of the hinged scissor frame 33 to move, so that the scissor frame 33 is folded horizontally, thereby adjusting the distance between the transmitting end coil 45 and the receiving end coil on the car.

[0051] By adopting the above structure, the signal is transmitted to the screw 31 according to the coupling conditions between the coils, and the distance between the transmitting end coil 45 and the receiving end coil of the vehicle is adjusted by rotating the screw 31, thereby improving the coupling capacity between the wireless charging coils, thereby improving the charging efficiency of the vehicle.

[0052] It is worth noting that the transmission rod 34 is slidably set at the bottom of the inner cavity of the vehicle body 1 through the orientation component 5. The orientation component 5 ensures the stability of the moving direction of the transmission rod 34 and avoids position deviation, thereby ensuring the accuracy of the position adjustment of the transmitting end coil 45.

[0053] In addition, the orientation component 5 includes a slide groove 51 opened on the top of the vehicle body 1 , a slide rod 52 is embedded in the inner cavity of the slide groove 51 , a slide seat 53 is sleeved on the outer portion of the slide rod 52 , and the slide seat 53 is connected to the transmission rod 34 .

[0054] With the above structure, in the process of driving the transmission rod 34 to move, the transmission rod 34 drives the slide seat 53 to slide against the outside of the slide rod 52. The sliding cooperation between the slide seat 53 and the slide rod 52 ensures the stability of the moving direction of the transmission rod 34, avoids position deviation, and thus ensures the accuracy of the position adjustment of the transmitting end coil 45.

[0055] In addition, a wiring hole 10 is provided at the bottom of the vehicle body 1, and a cable is passed through the wiring hole 10 to connect to a charging pile, thereby supplying power to the vehicle.

[0056] Furthermore, a partition 11 for separating the transmitting end coil 45 is provided on the top of the inner cavity of the vehicle body 1, and the partition 11 is a 3D printed part made of PLA material.

[0057] A magnetic pole layer 12 is embedded in the partition 11. The vehicle body moves to a fixed charging point, and then tries to move in all directions driven by the omnidirectional mobile chassis 2. Since the magnetic pole layer 12 is fixed inside it, a magnetic field will be spontaneously generated. When it passes through the receiving coil under the car, the coil cuts the magnetic flux lines to generate current, and the vehicle body 1 receives the signal. The receiving coil is precisely positioned by the strength of the induced signal. After positioning is completed, the lead screw 31 rotates to drive the magnetic pole layer 12 to move up and down, and the magnetic flux passing through the coil changes, generating an electromotive force, transmitting a signal, and determining the appropriate distance by the strength of the induced signal.

[0058] The transmitting end coil 45 is wired by embedding a directional bracket 7 installed in the inner cavity of the vehicle body 1. Three directional brackets 7 are fixed in the inner cavity of the vehicle body 1. Lead rings 71 are fixedly sleeved on the three directional brackets 7, so that the electromagnetic wire of the transmitting end coil 45 passes through the lead ring 71 and is electrically connected to the terminal.

[0059] A winding seat 8 is fixedly connected to the circumferential outer wall of the winding member 44, and winding spacers 81 are evenly arranged on the top of the winding seat 8 facing outward.

[0060] With the above structure, the electromagnetic wire of the transmitting end coil 45 is wound on the winding spacer 81 in sequence through the winding spacer 81. The winding spacer 81 prevents the electromagnetic wire from falling off during the winding process, thereby ensuring the stability of the charging process of the transmitting end coil 45.

[0061] A charging demodulation system for a wireless charging car of a new energy vehicle, as shown in the attached Figure 1 To Attachment Figure 7 As shown: S1: The communication control module at the transmitter end of the transformer controls the signal at the transmitter end. The communication control module transmits the PWM control signal through the single-chip microcomputer or FPGA controller. When the PWM control signal is expressed as 0, the signal at the transmitter end is multiplied by the cosine wave with a phase of 0 and then transmitted. At this time, the output waveform phase is 0;

[0062] S2: When the PWM control signal is 1, the signal at the transmitting end is multiplied by the cosine wave after phase shift \pi and then transmitted. The phase of the output waveform is now \pi, which is opposite to the former, that is, information is transmitted using phase difference;

[0063] S3: demodulate the signals of different phases transmitted to the receiving end, the induced voltage signal of the receiving end is first transmitted through a bandpass filter to filter noise, and then the signal is delayed for one cycle through a delay circuit, and the delayed signal and the original signal are connected to a multiplication circuit, that is, a comparison and judgment of the signal waveforms under different phases is performed, and the output signal is then input into a low-pass filter;

[0064] S4: The signal obtained from the low-pass filter is sampled and determined by the sampling decision device, and finally the demodulation is completed;

[0065] S5: Amplitude modulation is performed at the receiving end; the receiving end circuit signal first passes through a bridge full-wave rectifier circuit, and then a switch circuit is added after the bridge rectifier circuit, which is composed of a switch and a capacitor. The switch is switched through the communication control module of the receiving end. When the PWM control signal output by the single-chip microcomputer in the control module is 1, the switch is turned on, and when the output is 0, the switch is turned off. The part composed of the switch and the capacitor is connected in parallel with the inductor coil and in series with the rectifier circuit;

[0066] S6: Demodulation is performed at the transmitting end. During transmission, the switch on and off at the receiving end will cause the total impedance of the receiving end to change, thereby causing the current and voltage at the receiving end, as well as the current and voltage at the transmitting end to change. A capacitor in the transmitting end loop is used as a reader / writer, and the voltage across the capacitor will change in amplitude. The switch on and off corresponds to two different amplitudes, corresponding to 0 and 1 respectively, thus completing the demodulation.

[0067] By adopting the above demodulation system, through the cooperation of the omnidirectional mobile chassis and the fixed magnetic pole, the wireless charging car can autonomously align the wireless charging transmitter and the receiver, which ensures the charging efficiency while greatly reducing the difficulty of wireless charging. The lifting mechanism 3 cooperates with the variable diameter coil so that the car can adapt to cars of different models and chassis heights to ensure a higher charging efficiency. Compared with the traditional electromagnetic induction coupling charging demodulation system, the resonant wireless charging demodulation system has a longer transmission distance, and the transmitter and the receiver do not need to be completely fitted, so it has a greater application prospect.

[0068] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0069] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0070] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wireless charging vehicle for a new energy vehicle, comprising a vehicle body, characterized in that: The bottom of the vehicle body is rotatably provided with an omnidirectional mobile chassis, the bottom of the omnidirectional mobile chassis is evenly provided with universal wheels, the top of the vehicle body is provided with a lifting mechanism, the lifting end of the lifting mechanism is provided with a coil cover, the inner bottom of the inner cavity of the coil cover is rotatably provided with a groove wheel, the top of the groove wheel is evenly provided with through grooves, the inner cavity of the through groove is embedded with a roller, and the roller is slidably provided at the bottom of the inner cavity of the coil cover, one end of a connecting rod is rotatably provided on the roller, the other end of the connecting rod is rotatably connected with a receiving piece, and the outer periphery of the receiving piece is provided with a transmitting end coil; A limiting groove is provided on the bottom of the inner cavity of the coil outer cover, each limiting groove is inclined relative to each through groove, and the limiting groove is inclined toward the edge of the groove wheel; a limiting block is fixedly connected to the bottom of the roller, the limiting block slides in contact with the inner wall of the limiting groove, and the roller slides in contact with the inner wall of the through groove; A wire winding seat is fixedly connected to the circumferential outer wall of the sheet collecting member, and wire winding spacers are evenly arranged on the top of the wire winding seat toward the outside.

2. The wireless charging vehicle for new energy vehicles according to claim 1, characterized in that: The lifting mechanism includes a lead screw rotatably arranged on the top of the vehicle body, the external thread of the lead screw is connected with an adjustment seat, a scissors frame is arranged between the coil outer cover and the vehicle body, a transmission rod is penetrated on the adjustment seat, and the end of the transmission rod is hinged to a support rod of the scissors frame.

3. The wireless charging vehicle for new energy vehicles according to claim 2 is characterized in that: The transmission rod is slidably arranged at the bottom of the inner cavity of the vehicle body through a directional assembly.

4. The wireless charging vehicle for new energy vehicles according to claim 3 is characterized in that: The directional assembly comprises a slide groove opened on the top of the vehicle body, a slide rod is embedded and installed in the inner cavity of the slide groove, a slide seat is sleeved on the outside of the slide rod, and the slide seat is connected to the transmission rod.

5. The wireless charging vehicle for new energy vehicles according to claim 1, characterized in that: A wiring hole is provided at the bottom of the vehicle body.

6. The wireless charging vehicle for new energy vehicles according to claim 1, characterized in that: A partition for separating the transmitting end coil is arranged on the top of the inner cavity of the vehicle body, and the partition is a 3D printed part made of PLA material.

7. The wireless charging vehicle for new energy vehicles according to claim 6, characterized in that: A magnetic pole layer is embedded in the partition.

8. The wireless charging vehicle for new energy vehicles according to claim 1, characterized in that: The transmitting end coil is wired through a directional bracket embedded in the inner cavity of the vehicle body.

9. A charging demodulation system for a wireless charging vehicle for a new energy vehicle, based on the wireless charging vehicle for a new energy vehicle as claimed in any one of claims 1 to 8, characterized in that: S1: The communication control module at the transmitter end of the transformer controls the signal at the transmitter end. The communication control module transmits the PWM control signal through the single-chip microcomputer or FPGA controller. When the PWM control signal is expressed as 0, the signal at the transmitter end is multiplied by the cosine wave with a phase of 0 and then transmitted. At this time, the output waveform phase is 0; S2: When the PWM control signal is 1, the signal at the transmitting end is multiplied by the cosine wave after phase shift \pi and then transmitted. The phase of the output waveform is now \pi, which is opposite to the former, that is, information is transmitted using phase difference; S3: demodulate the signals of different phases transmitted to the receiving end, the induced voltage signal of the receiving end is first transmitted through a bandpass filter to filter noise, and then the signal is delayed for one cycle through a delay circuit, and the delayed signal and the original signal are connected to a multiplication circuit, that is, a comparison and judgment of the signal waveforms under different phases is performed, and the output signal is then input into a low-pass filter; S4: The signal obtained from the low-pass filter is sampled and determined by the sampling decision device, and finally the demodulation is completed; S5: Amplitude modulation is performed at the receiving end; the receiving end circuit signal first passes through a bridge full-wave rectifier circuit, and then a switch circuit is added after the bridge rectifier circuit, which is composed of a switch and a capacitor. The switch is switched through the communication control module of the receiving end. When the PWM control signal output by the single-chip microcomputer in the control module is 1, the switch is turned on, and when the output is 0, the switch is turned off. The part composed of the switch and the capacitor is connected in parallel with the inductor coil and in series with the rectifier circuit; S6: Demodulation is performed at the transmitting end. During transmission, the switch on and off at the receiving end will cause the total impedance of the receiving end to change, thereby causing the current and voltage at the receiving end, as well as the current and voltage at the transmitting end to change. A capacitor in the transmitting end loop is used as a reader / writer, and the voltage across the capacitor will change in amplitude. The switch on and off corresponds to two different amplitudes, corresponding to 0 and 1 respectively, thus completing the demodulation.

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