Vehicle wireless charging system

Abstract

A vehicle wireless charging system comprises an electromagnetic induction type wireless charging device body, a power module, an electric telescopic rod, a camera, a display screen and a photoelectric switch. The wireless charging device further comprises a first wireless receiving circuit, a second wireless receiving circuit, a second wireless transmitting circuit, a second wireless receiving circuit, a control circuit, a charging current detection circuit and a prompt module. The secondary coil is installed at the lower end of a vehicle, the camera is installed at the side end of the element box, and the primary coil, the electric telescopic rod, the electric linear sliding table and the photoelectric switch are installed in a charging station. The power supply module, the first wireless receiving circuit, the first wireless transmitting circuit, the control circuit and the charging current detection circuit are installed in the element box and are electrically connected, the second wireless receiving circuit and the display screen are installed in the element box A and are electrically connected, and the prompting module is application software installed in a mobile phone. According to the invention, high-density electromagnetic signal transmission is realized, electromagnetic signal attenuation is reduced, charging efficiency is improved, and charging current can be monitored.

Description

Technical Field

[0001] This invention relates to the field of wireless charging equipment technology, and in particular to a vehicle wireless charging system. Background Technology

[0002] Wireless charging is widely used in charging mobile phones and electric vehicles due to its flexibility and convenience. Wireless charging methods can be classified into three main types based on their structure and method: electromagnetic induction, magnetic field resonance, and radio wave charging. Among these, electromagnetic induction is more widely used in other fields due to its relatively simple structure, low cost, and relatively high power transmission density (but it is still less commonly used in electric vehicle charging). Electromagnetic induction transmits energy through the primary coil at the charging terminal. The secondary coil on the charging device (mobile phone or vehicle) senses the electromagnetic signal and converts it into a low-voltage DC power supply (such as 72V or 5V) through a step-down, rectification, and voltage regulation circuit to charge the vehicle or mobile phone battery.

[0003] While existing wireless charging devices based on electromagnetic induction have many advantages, their structural limitations also present obvious drawbacks when used for charging electric vehicles. These drawbacks are as follows: First, if electromagnetic induction is used to charge electric vehicles, the primary coil must be buried underground. When a vehicle passes over it, electricity is generated through induction at the secondary coil. This presents a problem: due to safety considerations, the secondary coil on the vehicle cannot be positioned too low under the vehicle body. The relatively large distance between the primary and secondary coils during charging leads to severe electromagnetic signal attenuation, resulting in a significant reduction in the electromagnetic energy received by the secondary coil and unnecessary energy waste. Second, there is no alignment indicator mechanism during charging. This means that the driver cannot effectively align the secondary and primary coils during charging, which also negatively impacts the charging effect. Summary of the Invention

[0004] To overcome the shortcomings of existing wireless charging devices for electric vehicles, which lack suitable electromagnetic induction technology, this invention provides a wireless charging system that can be easily installed along roadsides. With the combined action of relevant mechanisms, once the vehicle is in position, the driver can adjust the angle and spacing between the secondary coil at the bottom of the vehicle and the primary coil below the ground in real time via a camera. This effectively ensures contact between the secondary and primary coils, achieving high-density electromagnetic signal transmission, reducing electromagnetic signal attenuation, improving charging efficiency, and enabling real-time monitoring of the charging current. Once charging is complete, the system promptly alerts the driver to leave the charging location, providing convenience for the driver.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A vehicle wireless charging system includes an electromagnetic induction wireless charging device body, a power module, an electric telescopic rod, a camera, a display screen, and a photoelectric switch; characterized in that it further comprises a first wireless receiving circuit, a second wireless receiving circuit, a second wireless transmitting circuit, a second wireless transmitting circuit, a control circuit, a charging current detection circuit, and a prompting module; the secondary coil of the wireless charging device body is installed inside a component box, the component box is installed at the lower end of the vehicle, the camera is installed at the side of the component box, and the silicon steel frame of the secondary coil is located at the lower outer end of the vehicle; the primary coil of the wireless charging device body is installed inside a housing, the housing is installed at the upper end of the electric telescopic rod; multiple sets of electric linear slides are included, the lower end of the electric telescopic rod is installed on the sliding block of the first set of electric linear slides, the lower ends of the first set of electric linear slides are respectively installed on the upper ends of the sliding blocks of the second and third sets of electric linear slides, and the lower ends of the second and third sets of electric linear slides are installed at the charging station. The lower inner end; the photoelectric switch is installed inside the charging station side end; the power module, the first wireless receiving circuit, the first wireless transmitting circuit, the control circuit, and the charging current detection circuit are installed in the component box, which is installed inside the charging station; the second wireless receiving circuit and the display screen are installed in component box A, which is installed on the driver's console; the signal output terminals of the charging current detection circuit and the control circuit are electrically connected to the two signal input terminals of the first wireless transmitting circuit; the signal output terminal of the photoelectric switch is electrically connected to the trigger signal terminal of the control circuit; the power output terminal of the control circuit is electrically connected to both ends of the primary coil; the power output terminal of the first wireless receiving circuit is electrically connected to the power input terminals of the electric telescopic rod and the electric linear slide; the control terminal of the control circuit is electrically connected to the control terminal of the first wireless receiving circuit; the prompting module is an application software unit installed in the driver's mobile phone, which can prompt the charging location and distance around the vehicle.

[0007] Furthermore, the upper end of the silicon steel frame of the primary coil is located outside the upper end of the outer shell; when the movable column of the electric telescopic rod is at the lower stop point, the height of the primary coil is lower than the height of the charging station, and when the movable column of the electric telescopic rod is at the upper stop point, the height of the primary coil is higher than the height of the charging station.

[0008] Furthermore, the charging station has a canopy with a height and width greater than the height and width of the vehicle, and the charging station can also be an open structure provided that there are drainage measures at the bottom.

[0009] Furthermore, the first wireless receiving circuit includes a wireless receiving circuit module and a relay electrically connected together, wherein the positive control power input terminals of five relays and the control power input terminal of the seventh relay are respectively connected, the normally closed contact terminal of the seventh relay and the positive control power input terminal of the sixth relay are connected, the six power output terminals of the wireless receiving circuit module are respectively connected to the positive power input terminals of six relays, and the negative power input terminal of the wireless receiving circuit module is connected to the negative power input terminals and negative control power input terminals of the six relays and the negative power input terminal of the seventh relay.

[0010] Furthermore, the two contacts under the first signal transmission button of the first wireless transmission circuit are electrically connected together.

[0011] Furthermore, the control circuit includes a relay, a jog button, and a normally open contact power switch. There is a groove on the side of the housing, and the power switch is installed in the groove. The upper end of the power switch button is higher than the upper end of the housing. After the upper end of the primary coil frame and the lower end of the secondary coil frame come into contact, the internal contacts of the power switch close.

[0012] Furthermore, the second wireless receiving circuit includes a wireless receiving circuit module and resistors and light-emitting diodes that are electrically connected. The two power output terminals of the wireless receiving circuit module are respectively connected to one end of the two resistors, the other end of the two resistors are respectively connected to the positive terminals of the two light-emitting diodes, and the negative terminals of the two light-emitting diodes are connected to the negative power input terminal of the wireless receiving circuit module.

[0013] Furthermore, the charging current detection circuit is electrically connected to a voltage transformer, a rectifier bridge, a capacitor, a resistor, an NPN transistor, and a relay. The phase power input terminal of the primary coil passes through the central hole of the voltage transformer. The two ends of the secondary side of the voltage transformer are connected to the two power input terminals of the rectifier bridge. The positive terminal of the rectifier bridge is connected to one end of the capacitor, the positive power input terminal of the relay, and one end of the first resistor. The other end of the first resistor is connected to one end of the second resistor and one end of the third resistor. The other end of the second resistor is connected to the base of the NPN transistor. The collector of the NPN transistor is connected to the negative power input terminal of the relay. The other end of the third resistor is connected to the emitter of the NPN transistor.

[0014] The beneficial effects of this invention are as follows: This invention can be conveniently installed at regular intervals along roadsides. Under the combined action of related mechanisms, the primary coil is normally de-energized, achieving energy saving and extending its service life. After the vehicle arrives at its designated position, the driver can conveniently control the operation of three sets of electric linear slides and electric telescopic rods via video data transmitted through a camera and display screen, using wireless transmitting circuit B and wireless receiving circuit A. This allows for real-time adjustment of the angle and spacing between the secondary coil at the bottom of the vehicle and the primary coil below the ground, effectively ensuring effective contact between the secondary and primary coils (a wireless signal alerts the driver upon contact). This achieves high-density electromagnetic signal transmission, reduces electromagnetic signal attenuation, improves charging efficiency, and allows for real-time monitoring of the charging current. Once charging is complete, the driver is promptly alerted to leave the charging location, providing convenience. This invention greatly promotes the development of electric vehicle charging technology. Based on the above, this invention has promising application prospects. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 , 2 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 3 , 4 This is the circuit diagram of the present invention. Detailed Implementation

[0018] Figure 1 , 2As shown in Figures 3 and 4, a vehicle wireless charging system includes an electromagnetic induction wireless charging device body with a primary coil JT, a secondary coil CJ, and step-down, rectifier, and voltage regulator circuits; a waterproof electric linear slide; a power module A1; a waterproof electric telescopic rod M3; a camera SX; a display screen XS; and a photoelectric switch A5. The primary coil JT and the secondary coil XS are each composed of several turns of winding and a silicon steel frame (the several turns of winding are wrapped around the frame). The two terminals of the secondary coil CJ are connected to the power input terminal of the step-down circuit via wires. The power output terminal of the step-down circuit is connected to the power input terminal of the rectifier circuit via wires. The power output terminal of the rectifier circuit is connected to the power input terminal of the rectifier circuit via wires. The power input terminal of the output circuit and the power supply input terminal of the voltage regulator circuit are connected by wires. The power output terminal of the voltage regulator circuit and the two terminals of the battery above the vehicle are respectively connected by wires. The secondary coil CJ and the step-down, rectification, and voltage regulation circuits are installed in component box 1. Component box 1 is installed at the lower end of the vehicle. The video output terminal of the camera SX and the signal input terminal of the display screen XS are connected by wires. It also has a first wireless receiving circuit 2, a second wireless receiving circuit 3, a first wireless transmitting circuit A3, a second wireless transmitting circuit A4, a control circuit 4, a charging current detection circuit 5, and a prompt module. The lower part of the silicon steel frame of the secondary coil CJ is located at the middle of the lower end of the vehicle exterior. The camera SX is installed... The primary coil JT is sealed inside a housing 6 with an open upper structure. The lower middle part of the housing 6 is mounted on the movable column of the electric telescopic rod M3. There are three sets of electric linear slides. The lower end of the cylinder of the electric telescopic rod M3 is mounted on the sliding block of the first set of electric linear slides M1 via screws and nuts. The lower sides of the housing of the first set of electric linear slides M1 are respectively mounted on the upper ends of the sliding blocks of the second and third sets of electric linear slides M2 distributed on the left and right via screws and nuts. A recessed rectangular pit is opened in the ground of the charging area as an installation station 7. The second and third sets of electric linear slides M2 The lower end of the housing is installed in the lower part of the installation station 7 via screws and nuts; the photoelectric switch A5 is vertically installed in the middle of the rear end of the installation station 7 with its probe facing upwards; the power module A1, the first wireless receiving circuit 2, the first wireless transmitting circuit A3, the control circuit 4, and the charging current detection circuit 5 are sealed in the component box 8, which is installed in the upper part of the rear end of the installation station 7; the second wireless receiving circuit 3 and the display screen XS are installed in the component box A9, which is installed on the dashboard, with the display interface of the display screen XS located outside the upper opening of the component box A9; the second wireless transmitting circuit A4 is carried by the driver. The prompting module is an application software unit installed in the driver's mobile phone, which can prompt the charging location and distance within a certain range around the vehicle.

[0019] Figure 1 , 2As shown in Figures 3 and 4, the upper end of the silicon steel frame of the primary coil JT is located outside the upper end of the outer shell 6. When the movable column of the electric telescopic rod M3 is at its lower stop, the height of the primary coil JT is lower than the height of the installation station 7. When the movable column of the electric telescopic rod M3 is at its upper stop, the height of the primary coil JT is higher than the height of the installation station 7. The charging station 7 has a canopy (not shown in the figure) with a height and width greater than the height and width of the vehicle, respectively. The charging station 7 can also be an open structure provided that there are drainage measures at the lower end. The first wireless receiving circuit includes a wireless receiving circuit module A2 and relays connected via circuit board wiring. The positive control power input terminals of five relays K1, K2, K3, K4, and K5, and the control power input terminal of the seventh relay K7 are respectively connected to pin 1 of the positive power input terminal of the wireless receiving circuit module A2. The normally closed contact terminal of the seventh relay K7 is connected to the positive control power input terminal of the sixth relay K6. The six power output terminals 3, 4, 5, 6, 7, and 8 of the wireless receiving circuit module A2 are respectively connected to the positive power input terminals of the six relays K1, K2, K3, K4, K5, and K6. The negative power input terminal pin 2 of the wireless receiving circuit module A2 is connected to the negative power input terminals and negative control power input terminals of the six relays K1, K2, K3, K4, K5, and K6, and the negative power input terminal of the seventh relay K7. The first wireless transmitting circuit A3 has two contacts connected together under the first signal transmitting button S1. The second wireless transmitting circuit A4 is equipped with a separate 12V dedicated battery. The wireless transmitting circuit A4 is installed in a housing, and the six transmitting buttons are located outside the six openings at the top of the housing. The control circuit includes a relay K8, a jog button, and a normally open contact power switch D1. One end of the power switch D1, the negative power input terminal of the relay K8, and the power output terminals 3 and 4 of the power module A1 are connected by wires. There is a groove on the middle of the right side of the housing 6. The power switch D1 is separately and sealed in the groove, and the height of the top of the power switch D1 button is higher than the height of the right side of the top of the housing. After the upper end of the primary coil JT frame and the lower end of the secondary coil CJ frame make contact, the internal contacts of the power switch D1 close.

[0020] Figure 1 , 2As shown in Figures 3 and 4, the second wireless receiving circuit includes a wireless receiving circuit module A6 connected via circuit board wiring, resistors R4 and R5, and light-emitting diodes VL1 and VL2. The light-emitting surfaces of LEDs VL1 and VL2 are located outside the opening at the top of component box A9. The two power output terminals 3 and 4 of the wireless receiving circuit module A6 are respectively connected to one end of the two resistors R4 and R5. The other ends of the two resistors R4 and R5 are respectively connected to the positive terminals of the two LEDs VL1 and VL2. The negative terminals of the two LEDs VL1 and VL2 are connected to the negative power input terminal 2 of the wireless receiving circuit module A6. The charging current detection circuit includes a voltage transformer CK, a rectifier bridge A6, a capacitor C1, resistors R1, R2, and R3, an NPN transistor Q1, and a relay K, all connected via circuit board wiring. The phase power input terminal of the primary coil JT passes through the center hole of the voltage transformer CK. The two ends of the secondary side of the voltage transformer CK (one end of which is connected to pin 4 of the power module A1) are connected to the two power input terminals 1 and 2 of the rectifier bridge A6, respectively. The positive power output terminal 3 of the rectifier bridge A6 is connected to one end of the capacitor C1, the positive power input terminal of the relay K, and one end of the first resistor R1. The other end of the first resistor R1 is connected to one end of the second resistor R3 and one end of the third resistor R2. The other end of the second resistor R3 is connected to the base of the NPN transistor Q1. The collector of the NPN transistor Q1 is connected to the negative power input terminal of the relay K. The other end of the third resistor R2 is connected to the emitter of the NPN transistor Q1. Wireless transmitting circuit A3 and wireless transmitting circuit A4, wireless receiving circuit module A2 and wireless receiving circuit module A6 all have encoding circuits inside. Encoding through the encoding circuit can prevent interference between wireless transmitting and receiving circuit modules of the same model. The encoding circuits of wireless transmitting circuit A3 and wireless receiving circuit module A6 have the same encoding, and the encoding circuits of wireless transmitting circuit A4 and wireless receiving circuit module A2 have the same encoding.

[0021] Figure 1 , 2As shown in Figures 3 and 4, the vehicle's battery G1, display screen XS, camera SX, and the power input terminals of the second wireless receiving circuit module A6 (pins 1 and 2) are connected by wires. The power input terminals 1 and 2 of power module A1, the two control power input terminals of relay K8 in the control circuit, and the two poles of the 220V AC power supply are connected by wires. The power output terminal of power module A1, the power input terminals of the first wireless receiving circuit (pins 1 and 2), the power input terminals of wireless receiving circuit module A2, one end of power switch S1 in the control circuit, the negative power input terminal of relay K8, the power input terminals 1 and 2 of photoelectric switch A5, and the power input terminal of charging current detection circuit (the other end of resistor R2) are connected by wires. The signal output terminal of the charging current detection circuit, the control contact terminal and normally closed contact terminal of relay K, and the two lower contacts of the second transmitting switch S2 in the wireless transmitting circuit module A3 are connected by wires. The other end of power switch D1, pin 4 of power module A1, pins 1 and 2 of wireless transmitter circuit module A3, and the two power input terminals of relay K7 are connected by wires. The signal output terminals 3 and 2 of photoelectric switch A5 and the two power input terminals of relay K8 are connected by wires. The power output terminals of the control circuit, the two normally open contacts of relay K8 and the two ends of the primary coil JT, are connected by wires. The two normally open output terminals of relays K5 and K6 and the positive and negative / positive power input terminals of electric telescopic rod M3 are connected by wires. The two normally open contacts of relays K3 and K4 and the positive and negative / positive / positive power input terminals of the second and third linear slides M2 are connected by wires. The two normally open contacts of relays K1 and K2 and the positive and negative / positive / positive power input terminals of the first linear slide M1 are connected by wires.

[0022] Figure 1 , 2As shown in Figures 3 and 4, in this invention, the prompting module can indicate the charging location and distance within a certain range around the vehicle, allowing the driver to quickly find the nearest charging station. After the AC 220V power supply enters the power input terminal of the power module A1, the power module A1 outputs a stable DC 12V power supply through pins 3 and 4, which enters the power input terminals of the control circuit, photoelectric switch, and first wireless receiving circuit. The aforementioned circuits and photoelectric switch A5 are powered on and operate. After the driver turns on the power switch D2, the second wireless receiving circuit, camera SX, and display screen XS are powered on and operate. This invention can be conveniently installed at regular intervals along the roadside (vehicle owners who need charging can purchase the wireless transmitting circuit A4 from the equipment supplier and install the secondary coil CJ, step-down, rectification, and voltage regulation circuits, as well as the display screen, camera, and second wireless receiving circuit, etc., on their vehicles). After the driver drives the vehicle to the upper end of the installation station, the image of the secondary coil CJ on the vehicle and the image of the installation station are captured by the camera SX and displayed on the display screen XS. By maneuvering the vehicle's secondary coil CJ close to the primary coil JT, the primary and secondary coils can be wirelessly controlled to contact each other via the wireless transmitting circuit A4. When the driver presses the third or fourth button S3 or S4 of the portable wireless transmitter circuit A4, the wireless transmitter circuit A4 emits a third or fourth wireless closing signal (the signal stops emitting when the button is released). Upon receiving this signal, the wireless receiver circuit module A2 outputs a high-level signal from pin 5 or 6, which enters the positive power input terminal of relay K3 or K4. Relay K3 or K4 is energized and its control power input terminal and normally open contact terminal close. Thus, the second set of electric linear slides and the third set of electric linear slides M2... When the negative or positive power input terminals are energized, the sliding blocks of the second and third electric linear slides M2 drive the first electric linear slide M1 and the primary coil JT forward to approach the secondary coil CJ at the lower end of the vehicle. When the negative and positive terminals of the second and third electric linear slides M2 (electric screw type electric linear slide finished products) are energized, their sliding blocks drive the first electric linear slide M1 and the primary coil JT backward to approach the secondary coil CJ at the lower end of the vehicle. When the driver presses the first or second button S1 or S2 of the wireless transmitting circuit A4, the wireless transmitting circuit A4 emits the first or second wireless closing signal (the signal stops emitting when the hand is released). After receiving the signal, the wireless receiving circuit module A2 outputs a high level from pin 3 or 4, which enters the positive power input terminal of relay K1 or K2. The relay K1 or K2 is energized and its control power input terminal and normally open contact terminal are closed. In this way, the positive and negative or negative and positive power input terminals of the first set of electric linear slide M1 are energized. After the positive and negative terminals of the first set of electric linear slide M1 (electric screw type electric linear slide finished product) are energized, its sliding block drives the primary coil JT to move to the left and approach the secondary coil CJ at the lower end of the vehicle; after the negative and positive terminals of the first set of electric linear slide M1 are energized, its sliding block drives the primary coil JT to move to the right and approach the secondary coil CJ at the lower end of the vehicle.When the driver presses the fifth or sixth button S5 or S6 of the wireless transmitter circuit A4, the wireless transmitter circuit A4 emits the fifth or sixth wireless closing signal (the signal stops emitting when the button is released). After the wireless receiver circuit module A2 receives the signal, its pin 7 or 8 outputs a high level, which enters the positive power input terminal of the relay K5 or K6. The relay K5 or K6 is energized and its control power input terminal and normally open contact terminal close. In this way, the positive and negative or negative and positive power input terminals of the electric telescopic rod M3 are energized. After the positive and negative terminals of the electric telescopic rod M3 are energized, its movable rod drives the primary coil JT to move upward and approach the secondary coil CJ at the lower end of the vehicle. After the positive and negative terminals of the electric telescopic rod M3 are energized, its movable rod drives the primary coil JT to move downward and increase the distance between it and the secondary coil CJ at the lower end of the vehicle (this operation is performed to complete charging). When the driver operates the electric telescopic boom M3 to move the primary coil JT upwards, and the primary coil JT is not in contact with the secondary coil CJ, the button on the power switch S1 will not contact the secondary coil CJ frame, the internal contacts of the power switch S1 are open, and the electric telescopic boom M3 (the finished reciprocating electric telescopic boom) continues to move the primary coil JT upwards. When the primary coil JT contacts the secondary coil CJ frame, the button on the power switch S1 will contact the secondary coil CJ, and the internal contacts of the power switch S1 will close (at this moment, the relay K7 is energized and its control power is engaged). With the input terminal and normally closed contact open, the 12V power supply no longer enters the positive control power input terminal of relay K6 via relay K7. The positive control power input terminal of relay K6 is de-energized, thus de-energizing the electric telescopic rod M3 (which also ceases operation). The electric telescopic rod M3 no longer drives the primary coil JT upwards, ensuring effective contact between the lower end of the secondary coil CJ and the upper end of the primary coil JT, and preventing any adverse effects on the normal operation of the primary coil JT and the electric telescopic rod M3 due to uncontrolled upward movement. Simultaneously, when the internal contacts of power switch D1 close, the positive power input terminal of the wireless transmission circuit A3 is energized. Since the two contacts of button S1 are pre-connected, the wireless transmission circuit A3 will emit the first wireless closure signal. After the wireless receiver circuit module A6 in the vehicle receives the signal, its pin 3 will output a high level. This high level is then limited and reduced by resistor R4 and fed into the power input terminal of LED VL1 (red LED). When LED VL1 is energized, it illuminates to indicate to the driver that the lower end of the secondary coil CJ and the upper end of the primary coil JT have made effective contact. The driver can then stop wirelessly controlling the primary coil JT to move upwards and can enter the charging process.As described above, after the vehicle of this invention has reached its designated position, the driver can use the video data transmitted by the camera and display screen to conveniently control the operation of the three sets of electric linear slides and electric telescopic rods via the wireless transmitting circuit A4 and the second wireless receiving circuit. This enables real-time adjustment of the angle and spacing between the secondary coil at the bottom of the vehicle and the primary coil below the ground, while ensuring effective contact between the secondary and primary coils (a wireless signal alerts the driver upon contact). This achieves the transmission of high-density electromagnetic signals, reduces the degree of electromagnetic signal attenuation, and improves charging efficiency.

[0023] Figure 1 , 2As shown in Figures 3 and 4, when the vehicle is not in the installation (charging) bay, pin 3 of photoelectric switch A5 does not output a high level, relay K8 is not energized, and therefore, the primary coil JT is not energized. When the vehicle enters the installation bay, the probe of photoelectric switch A5 is blocked, causing pin 3 to output a high level, which enters the positive power input terminal of relay K8. Relay K8 is energized and its control power input terminal and normally open contact terminal close, thus energizing the primary coil JT. Through the above, the primary coil is normally in a de-energized state, achieving energy saving and extending its service life. During charging, the current signal flowing through the primary coil JT acts on the voltage transformer CK. The high-level output of the secondary side of the voltage transformer CK enters the power input terminal of the rectifier bridge A6. The DC power signal output from pins 3 and 4 of the rectifier bridge A6 is filtered by capacitor C1 and then enters one end of resistor R1 and the emitter of NPN transistor Q1. During normal charging, the current signal flowing through the voltage transformer CK is relatively large (e.g., greater than 500mA). The voltage signal output from pins 3 and 4 of the rectifier bridge A6 is divided by resistors R1 and R2, and then reduced and current-limited by resistor R3 before entering the base of NPN transistor Q1, which is higher than 0.7V. NPN transistor Q1 conducts, and the collector outputs a low-level signal, which enters the negative power input terminal of relay K. Relay K is energized and its control power input terminal and normally closed contact terminal are opened. Therefore, the wireless transmitting circuit A3 will not transmit the second wireless closing signal. After the vehicle battery G1 is fully charged, the current signal flowing through the voltage transformer CK is relatively small (e.g., less than 500mA). The voltage signal output from pins 3 and 4 of the rectifier bridge A6 is divided by resistors R1 and R2, and then reduced and current-limited by resistor R3 before entering the base of NPN transistor Q1, which is below 0.7V. NPN transistor Q1 is cut off, and its collector no longer outputs a low level, which enters the negative power input terminal of relay K. Relay K is de-energized, and its control power input terminal and normally closed contact terminal close. Therefore, the two contacts under the second button S2 of the wireless transmitter circuit A3 will close, and the wireless transmitter circuit A3 will transmit a second wireless closing signal. After receiving this signal, the wireless receiver module A6 on the vehicle will output a high level from pin 4. This high level is then reduced and current-limited by resistor R5 before entering the power input terminal of LED VL2. LED VL2 (a red LED) is energized and illuminates, indicating to the driver that charging is complete and the vehicle can be driven away (before leaving, the owner wirelessly controls the electric telescopic pole M3 to drive the primary coil JT downwards). In this invention, after the vehicle enters the charging station, the wireless transmission circuit module stops transmitting the second wireless signal due to the large charging current. Through this, the invention can promptly notify the driver to leave the charging location after charging is complete, providing convenience for the driver. This invention has greatly promoted the development of electric vehicle charging technology.

[0024] Figure 3 , 4As shown, power module A1 is a finished AC 220V to DC 12V switching power supply module; resistors R1, R2, R3, R4, and R5 have resistance values ​​of 110K, 10K, 47K, 1.8K, and 1.8K respectively; capacitor C1 is a 470μF / 25V capacitor (for filtering); relays K, K1, K2, K3, K4, K5, K6, K7, and K8 are DC 12V relays; NPN transistor Q1 is a 9013; wireless transmitting circuits A3 and A4, and wireless receiving circuit modules A2 and A6 are finished SF20 wireless transceiver module components with a wireless signal transmission and reception distance of 20 meters; photoelectric switch A5 is an E3K100-100 PNP infrared reflective photoelectric switch. The voltage is 12V DC. It has three connection wires, two of which, pins 1 and 2, are power input wires, and the other, pin 3, is a signal output wire. The upper end of the photoelectric switch has a probe. When working, the transmitter of the probe emits an infrared beam. When the infrared beam emitted by the probe is blocked by an object within a range of up to 100 cm, it is received by the receiver in parallel with the probe, and the signal output pin 3 will output a high level. When there is no object blocking the beam, the signal output pin 3 will not output a high level. There is an adjustment knob on the lower end of the photoelectric switch housing. Adjusting the knob to the left shortens the detection distance of the probe, and adjusting it to the right lengthens the detection distance. The rectifier bridge A2 is model KBP301. The voltage transformer CK is a finished single-phase voltage transformer of model DZ(X)10-1.

[0025] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. It will be apparent to those skilled in the art that the present invention is limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0026] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vehicle wireless charging system, comprising an electromagnetic induction wireless charging device body, a power module, an electric telescopic rod, a camera, a display screen, and a photoelectric switch; characterized in that, It also includes a first wireless receiving circuit, a second wireless receiving circuit, a second wireless transmitting circuit, a second wireless transmitting circuit, a control circuit, a charging current detection circuit, and a prompting module; the secondary coil of the wireless charging device body is installed inside a component box, which is installed at the lower end of the vehicle, and the camera is installed on the side of the component box; the silicon steel frame of the secondary coil is located at the lower end of the vehicle exterior; the primary coil of the wireless charging device body is installed inside a housing, which is installed on the upper end of the electric telescopic rod; there are multiple sets of electric linear slides, the lower end of the electric telescopic rod is installed on the sliding block of the first set of electric linear slides, the lower ends of the first set of electric linear slides are respectively installed on the upper ends of the sliding blocks of the second and third sets of electric linear slides, and the lower ends of the second and third sets of electric linear slides are installed at the lower end of the charging station; the photoelectric switch is installed inside the side of the charging station, and the power module, first The wireless receiving circuit, the first wireless transmitting circuit, the control circuit, and the charging current detection circuit are installed in a component box, which is installed on the inner side of the charging station. The second wireless receiving circuit and the display screen are installed in component box A, which is installed on the driver's console. The signal output terminals of the charging current detection circuit and the control circuit are electrically connected to the two signal input terminals of the first wireless transmitting circuit. The signal output terminal of the photoelectric switch is electrically connected to the trigger signal terminal of the control circuit. The power output terminal of the control circuit is electrically connected to both ends of the primary coil. The power output terminal of the first wireless receiving circuit is electrically connected to the power input terminals of the electric telescopic rod and the electric linear slide. The control terminal of the control circuit is electrically connected to the control terminal of the first wireless receiving circuit. The prompting module is an application software unit installed in the driver's mobile phone, which can prompt the charging location and distance around the vehicle.

2. The vehicle wireless charging system according to claim 1, characterized in that, The upper end of the silicon steel frame of the primary coil is located outside the upper end of the outer shell; when the movable column of the electric telescopic rod is at the lower stop point, the height of the primary coil is lower than the height of the charging station; when the movable column of the electric telescopic rod is at the upper stop point, the height of the primary coil is higher than the height of the charging station.

3. The vehicle wireless charging system according to claim 1, characterized in that, The charging station has a canopy that is taller and wider than the vehicle's height and width, and can also be an open structure provided that there are drainage measures at the bottom.

4. The vehicle wireless charging system according to claim 1, characterized in that, The first wireless receiving circuit includes a wireless receiving circuit module and relays that are electrically connected. The positive control power input terminals of five relays and the control power input terminal of the seventh relay are connected respectively. The normally closed contact terminal of the seventh relay and the positive control power input terminal of the sixth relay are connected. The six power output terminals of the wireless receiving circuit module are connected to the positive power input terminals of six relays respectively. The negative power input terminal of the wireless receiving circuit module is connected to the negative power input terminals of six relays, the negative control power input terminal, and the negative power input terminal of the seventh relay.

5. A vehicle wireless charging system according to claim 1, characterized in that, The two contacts of the first signal transmission button in the first wireless transmission circuit are electrically connected together.

6. A vehicle wireless charging system according to claim 1, characterized in that, The control circuit includes a relay, a jog button, and a normally open contact power switch. There is a groove on the side of the housing, and the power switch is installed in the groove. The upper end of the power switch button is higher than the upper end of the housing. After the upper end of the primary coil frame and the lower end of the secondary coil frame come into contact, the internal contacts of the power switch close.

7. A vehicle wireless charging system according to claim 1, characterized in that, The second wireless receiving circuit includes a wireless receiving circuit module, resistors, and light-emitting diodes that are electrically connected. The two power output terminals of the wireless receiving circuit module are connected to one end of each of the two resistors, the other end of each of the two resistors is connected to the positive terminals of the two light-emitting diodes, and the negative terminals of the two light-emitting diodes are connected to the negative power input terminal of the wireless receiving circuit module.

8. A vehicle wireless charging system according to claim 1, characterized in that, The charging current detection circuit is electrically connected to a voltage transformer, a rectifier bridge, a capacitor, a resistor, an NPN transistor, and a relay. The phase power input terminal of the primary coil passes through the center hole of the voltage transformer. The two ends of the secondary side of the voltage transformer are connected to the two power input terminals of the rectifier bridge. The positive terminal of the rectifier bridge's power output is connected to one end of the capacitor, the positive power input terminal of the relay, and one end of the first resistor. The other end of the first resistor is connected to one end of the second resistor and one end of the third resistor. The other end of the second resistor is connected to the base of the NPN transistor. The collector of the NPN transistor is connected to the negative power input terminal of the relay. The other end of the third resistor is connected to the emitter of the NPN transistor.

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