An electric vehicle charging system

Abstract

An electric vehicle charging system includes a track, an electric trolley, an AC-to-DC power supply module, a photoelectric switch, a main control module, and a wireless camera. It also includes a power supply mechanism, a power receiving mechanism, a full-charge indication circuit, a receiving unit, a control unit, a billing unit, a metering unit, a display unit, and a notification unit. The AC-to-DC power supply module, the main control module, the transmitter of the photoelectric switch, and the full-charge indication circuit are installed inside the control box. A deep pit is excavated beneath the road surface in the charging area, and two sets of tracks are laid at the lower end of the pit. The electric trolley and the power supply mechanism are installed on the tracks, and the power receiving mechanism is installed on the vehicle. This invention allows the vehicle owner to leave the site after the power receiving mechanism is in position, and return to move the vehicle after receiving a full charge indication, providing convenience for the driver. Once each vehicle is fully charged, the equipment can automatically charge multiple vehicles in a cycle, achieving both intelligent control and energy saving.

Description

Technical Field

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

[0002] Electric vehicles are becoming increasingly common due to their energy efficiency and environmental friendliness. Existing electric vehicle charging stations typically include a power module and a main control module. During charging, the owner inserts the charging plug (charging gun) into the electric vehicle's charging port. After scanning a QR code with their mobile phone, the main control module controls the power module to charge the vehicle's battery. Once fully charged, the power module stops outputting power (by unplugging the charging plug). A third-party application then deducts payment from the owner, completing the entire charging process.

[0003] While existing electric vehicle charging stations meet charging needs to some extent, their structural limitations also present several drawbacks that urgently require improvement. These include: First, charging station construction typically requires large areas and dedicated site selection, resulting in inflexible construction methods and increased investment costs. Furthermore, the limited number of charging stations due to site constraints hinders the charging needs of electric vehicles. Second, when multiple vehicles are charging, if there is only one charging station or charging gun on-site, subsequent vehicles must wait for the previous vehicle to fully charge before charging themselves. This means that drivers essentially have to wait on-site throughout the entire process (after the previous vehicle finishes charging, the driver of the next vehicle moves to the charging station), causing considerable inconvenience. Therefore, providing a charging system that can be easily installed anywhere along roads and offers convenience to drivers is of paramount importance. Summary of the Invention

[0004] In order to overcome the shortcomings of existing electric vehicle charging piles, which are limited by their structure as described in the background, this invention provides an electric vehicle charging system that can be easily constructed along roads. With the joint action of relevant mechanisms, multiple vehicles can arrive at the charging station. After the power receiving mechanism at the lower end of the vehicle body is in place, the vehicle owner can leave the site and return to the mobile vehicle after being notified when the vehicle is fully charged. This provides convenience for the driver.

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

[0006] An electric vehicle charging system includes a track, an electric trolley, an AC-to-DC power supply module, a photoelectric switch, a main control module, and a wireless camera. Its distinguishing feature is that it further comprises a power supply mechanism, a power receiving mechanism, a full-charge indicator circuit, a receiving unit, a control unit, a payment unit, a metering unit, a display unit, and a notification unit. The receiving unit, control unit, payment unit, metering unit, and notification unit are application software within the main control module, while the display unit is application software within each vehicle owner's smartphone. The AC-to-DC power supply module, the main control module, the transmitter of the photoelectric switch, and the full-charge indicator circuit are installed inside an electrical control box, and the charging area is located on the road surface. A deep pit is excavated below. The electrical control box is installed on one side of the pit, and the receiving end of the photoelectric switch is installed on the other side. Two sets of tracks are laid in the lower part of the pit. The sides of the two sets of tracks are electrically connected to the power output ends of the AC-to-DC power module. Conductive rings are insulated and installed on the outer ends of the power output shafts of two motor reduction mechanisms of the electric trolley. Contact plates are insulated and installed on both sides of the trolley body. The contact plates are in contact with the outer ends of the conductive rings. The wheels of the electric trolley have guide grooves on their outer sides, which are located on the upper outer side of the tracks. The power supply mechanism includes an electric push rod, a sliding contact device, and a support plate. The support plate is installed on the electric push rod. On the movable rod, there are two sets of sliding contact devices. The lower ends of the two sets of sliding contact devices are respectively installed on both sides of the upper part of the support plate. The camera is installed on the front of the upper part of the support plate. The upper ends of the two contact plates are electrically connected to the two sets of sliding contact devices and the wireless camera. The lower end of the electric push rod is installed on the upper part of the electric trolley. Each vehicle is equipped with one set of the power receiving mechanism. Each set of power receiving mechanism includes an electric linear slide, a camera, a display screen, a power switch, and a contact plate. There are two sets of electric linear slides. One set of electric linear slides is installed longitudinally on the lower outer end of the vehicle, and the second set of electric linear slides is installed laterally on the lower end of the sliding block of the first set of electric linear slides. The contact... The plate is installed on one side of the lower end of the sliding block of the second set of electric linear slides. Two contact pieces A are installed on the lower end of the contact plate. The two contact pieces A are electrically connected to the two poles of the vehicle's battery. The camera is installed under the vehicle body. A QR code containing the vehicle owner's information is attached to the other end of the sliding block of the second set of electric linear slides. The power output terminal of the main control circuit board is electrically connected to the power input terminal of the electric car's motor reduction mechanism and electric push rod. The signal output terminal of the full charge indication circuit is electrically connected to the signal input terminal of the main control circuit board. The center hole of the matching voltage transformer of the full charge indication circuit is sleeved on the outside of the phase power input terminal of the AC to DC power module.

[0007] Furthermore, the sliding contact device includes a sleeve, a spring, and a slide rod. The lower end of the spring is installed inside the lower end of the sleeve, the lower end of the slide rod is installed inside the upper end of the spring, and the lower part of the slide rod is located inside the upper part of the sleeve. A contact ball is installed at the upper end of the slide rod, and the lower end of the sleeve is installed on a support plate.

[0008] Furthermore, the display screen and power switches are mounted on the vehicle's dashboard, and the power output terminals of the two power switches and the power input terminals of the two sets of electric linear slides are electrically connected respectively.

[0009] Furthermore, the full charge indication circuit includes an electrically connected voltage transformer, an adjustable resistor, a resistor, an NPN transistor and a relay, a rectifier bridge, and a capacitor. The two terminals on the secondary side of the voltage transformer and the two power input terminals of the rectifier bridge are electrically connected respectively. The positive power output terminal of the rectifier bridge is connected to the positive terminal of the capacitor, one end of the adjustable resistor, the positive terminal of the relay, and the control power input terminal. The other end of the adjustable resistor is connected to one end of the first resistor and one end of the second 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 first resistor is connected to the emitter of the NPN transistor.

[0010] Furthermore, the receiving unit can receive video data sent by the wireless camera and output the data to the control unit. The control unit can control the motor reduction mechanism to drive the electric trolley to move on the track. When there is a vehicle at the corresponding position above the wireless camera, the power output stops, and then the electric telescopic rod is energized and the movable column moves upward. After the sliding rods of the two sets of sliding contact devices contact the contact piece A at the lower end of the vehicle, the electric telescopic rod is de-energized.

[0011] Furthermore, after the vehicle is fully charged, the control unit can control the slide rods and contact plates A of the two sets of sliding contact devices to separate and charge the next vehicle.

[0012] Furthermore, after the sliding rods of the two sets of sliding contact devices contact the contact piece A at the lower end of the vehicle, the control unit pushes a login prompt to the vehicle owner. After the vehicle owner receives the prompt, logs into the APP, and selects the charging option, the control unit controls the AC to DC power module to output DC power.

[0013] Furthermore, the metering unit counts the amount of electricity the vehicle is charging and charges accordingly. Once fully charged, the billing unit deducts the charge from the vehicle owner and sends a full charge notification to the display unit. After receiving the notification, the vehicle owner can view the charging data and the charge amount on the display unit.

[0014] Furthermore, the electric trolley can automatically stop working when it reaches the end points on both sides of the track.

[0015] Furthermore, the receiving end of the photoelectric switch is equipped with a relay. The power output end of the photoelectric switch receiving end is electrically connected to the power input end of the main control module. The control power output end of the main control module is electrically connected to the two power input ends of the relay, and the two normally open contact ends of the relay are electrically connected to the power input ends of the AC to DC power supply module.

[0016] The beneficial effects of this invention are as follows: This invention can be easily installed along roadsides. With the combined action of relevant mechanisms, multiple vehicles can be lined up at the charging station. Drivers control the charging mechanism at the bottom of each vehicle via the vehicle's control mechanism until it is aligned with the ground opening. The vehicle owner can then leave the site and return after receiving a notification that the vehicle is fully charged, thus providing convenience for the driver. Before charging, the photoelectric switch only powers the relevant circuits via the main control circuit board (main control module) after a vehicle is present. After each vehicle is fully charged, the equipment automatically moves from left to right and from right to left to cyclically charge multiple vehicles, achieving intelligent control while also saving energy. This invention brings convenience to electric vehicle charging and has good application prospects. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 , 2 5 is a schematic diagram of the overall structure of the present invention.

[0019] Figure 3 , 4 This is the circuit diagram of the present invention.

[0020] Figure 6 This is a software architecture block diagram of the present invention. Detailed Implementation

[0021] Figure 1 , 2As shown in Figures 3, 4, 5, and 6, an electric vehicle charging system includes a track 1, an electric trolley, an AC-to-DC power module A5 (e.g., an AC 220V to DC 72V power module), a photoelectric switch A3, a main control module A4 (a small computer system), and a wireless camera A6. It also includes a power supply mechanism, a power receiving mechanism, a full charge indicator circuit 2, a receiving unit, a control unit, a deduction unit, a metering unit, a display unit, and a notification unit. The receiving unit, control unit, deduction unit, metering unit, and notification unit are application software installed within the main control module, and the display unit is application software installed on each vehicle owner's smartphone. The AC-to-DC power module A5, the main control module A4, the main control module A5, the main control module A6 ...5, the main control module A6, the main control module A5, the main control module A6, the main control module A5, the main control module A6, the main control module A5, the main control module A6, the main control module A5, the main control module A6, the main control module A5, the main control module A The transmitters of the control module A4 and photoelectric switch A3, and the full charge indication circuit 2 are installed inside the control box 3. A deep pit 4 (40 cm is sufficient) is dug horizontally below the road surface in the charging area. A rain shelter (not shown in the figure, to prevent rainwater from entering the pit 4) is built on the top of the pit 4 (the length of the pit 4 is greater than the horizontal width of several cars parked side by side). The control box 3 is installed on the ground at the right end of the pit, and the transmitter probe of the photoelectric switch A3 (the height of which is higher than the height of the vehicle wheel and close to the height of the vehicle body) faces the left side of the control box 3. The receiver of the photoelectric switch A3 is installed on the other side of the pit 4, and the receiver and transmitter of the photoelectric switch A3 are horizontally aligned.There are two sets of track 1 (copper angle steel), laid horizontally at a certain distance between them in the lower part of the deep pit 4. The right ends of the two sets of track 1 and the power output terminals 3 and 4 of the AC to DC power module A5 are connected by wires. The electric trolley includes a car body 5 and four sets of motor reduction mechanisms M2 driving wheels 6. Each set of motor reduction mechanism M2 has a flange on the outer end of the power output shaft and an inner end of the wheel axle. An insulating plate 8 is installed between the outer end of the power output shaft and the inner end of the wheel axle. The flanges on the outer end of the power output shaft and the inner end of the wheel axle are connected by screws. The four sets of motor mechanisms M2 are insulated together. The upper ends of the motor housings of the four sets of motor mechanisms M2 are respectively installed around the lower end of the vehicle body 5 via screws and nuts. There is a ring-shaped guide groove 61 on the outer side of the middle of the wheel 6. The guide grooves 61 of the four sets of wheels (made of copper) are located on the outer side of the upper end of the two sets of tracks 1, and the inner diameter of the guide groove 61 is slightly larger than the front and rear width of the upper end of the track 1 by 1 mm. On the outer side of the middle of the wheel axle of the two sets of motor reduction mechanisms M2 at the front end of the vehicle body, a ring-shaped copper slip ring 9 is tightly fitted. A fixed seat is installed horizontally on the upper end of the housing of the two sets of motor reduction mechanisms. The outer end of the fixed seat is equipped with a... A copper contact piece 10 is provided, with its lower inner side in contact with and electrically connected to the outer left front end of the slip ring 9. The power supply mechanism includes an electric push rod M1, a sliding contact device 11, and an insulating support plate 12. The lower middle part of the support plate 12 is mounted on the movable rod of the electric push rod M1. There are two sets of sliding contact devices 11, with their lower ends spaced apart on the left and right sides of the upper end of the support plate 12. A wireless camera A6 is mounted on the upper front middle part of the support plate 12 (lens facing upwards). The upper ends of the two contact pieces 10 and the sliding rods CT of the two sets of sliding contact devices 11 are connected. The wires are led out through the opening on the left side of the lower end of the sleeve 15) and the two ends of the power input of the wireless camera A6 are respectively connected by wires (the power input of the wireless camera A6 and the power output of the DC to DC power module A are respectively connected by wires, and the power input of the power module A and the upper ends of the two contact pieces 10 are respectively connected by wires; the power module A converts the input DC 72V power to DC 12V power to power the wireless camera A6, and the power module A is installed at the lower rear end of the support plate 12). The lower end of the cylinder of the electric push rod M1 is installed on the outer side of the middle of the upper end of the vehicle body.Each vehicle is equipped with one power receiving mechanism (purchased and installed by the vehicle owner from the equipment dealer). Each power receiving mechanism includes electric linear slides M and M3, a camera SX, a display screen XS, power switches S1 and S2, and a contact plate 18. There are two sets of electric linear slides. The housing of one set of electric linear slides M is longitudinally distributed and installed at the front center of the lower part of the vehicle via screws and nuts. The housing of the second set of electric linear slides M3 is laterally distributed and installed at the lower end of the sliding block of the first set of electric linear slides M. The insulating contact plate 18 is installed at the lower left end of the sliding block of the second set of electric linear slides M3. A copper contact piece CZ1 is glued to the left and right sides of the lower end of the contact plate 18 at a certain distance (1 cm). The two contact pieces CZ1 and the two poles of the vehicle's battery G1 are connected by wires (with... With a certain length margin, the camera SX is installed on the lower part of the vehicle body and on the side of the first set of electric linear slides M. The lower right end of the sliding block of the second set of electric linear slides M3 is attached with a QR code 14 containing the owner's information. A transparent plastic protective plate is installed on the lower outer end of the QR code 14. The power output terminals 5 and 6, 3 and 4 of the main control circuit board A4 and the positive and negative and negative positive two-pole power input terminals of the four sets of motor reduction mechanisms M2 and the positive and negative and negative positive two-pole power input terminals of the electric push rod M1 are respectively connected by wires. The normally closed contact terminal of the signal output terminal relay K1 of the full charge indication circuit is connected to the signal input terminal 9 of the main control circuit board A4 by wires. The middle opening of the voltage transformer T of the full charge indication circuit is sleeved on the outside of the phase power input terminal of the AC to DC power module A5.

[0022] Figure 1 , 2As shown in Figures 3, 4, 5, and 6, the sliding contact device includes a copper sleeve 15, a spring 16, and a copper slide rod CT. The lower end of the spring 16 is welded to the lower end of the inner sleeve 15, and the lower end of the slide rod CT is welded to the upper end of the spring 16, with the lower part of the slide rod CT located in the upper part of the inner sleeve 15. A copper metal contact ball 17 is welded to the upper end of the slide rod CT. The lower end of the sleeve 15 is mounted on a support plate, and the outer diameter of the contact ball 17 is smaller than the spacing between the inner sides of the contact pieces CZ1. The display screen XS and power switches S1 and S2 are installed in the component box 19 on the vehicle dashboard. The video input terminal of the display screen XS and the video output terminal of the camera SX are connected by a data cable. The power input terminals of the two power switches S1 and S2, the camera SX, and the display screen XS are connected to the two terminals of the vehicle battery G by wires. The power output terminals 3 and 4 and 5 and 6 of the two power switches S1 and S2 are connected to the positive and negative terminals and the negative and positive terminals of the two sets of electric linear slides M and M3 (finished 20W small electric ball screw slides) by wires. The full charge indication circuit includes a voltage transformer T, an adjustable resistor RP1, resistors R1 and R2, an NPN transistor Q1, a relay K1, a rectifier bridge A5, and a capacitor C1, all connected via circuit board wiring. The two terminals on the secondary side of the voltage transformer T and the two power input terminals 1 and 2 of the rectifier bridge A5 are connected by wires. The positive power output terminal 3 of the rectifier bridge A5 is connected to the positive terminal of capacitor C1, one end of the adjustable resistor RP1, the positive terminal of the relay K1, and the control power input terminal. The other end of the adjustable resistor RP1 is connected to one end of the first resistor R1 and one end of the second resistor R2. The other end of the second resistor R2 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 K1. The other end of the first resistor R1 is connected to the emitter of the NPN transistor Q1. The receiver of photoelectric switch A3 is equipped with a relay K. The power output pin 3 and negative power input pin 2 of the receiver of photoelectric switch A3 are connected to the power input pins 1 and 2 of the main control module A4 via wires. The control power output pins 7 and 8 of the main control module A4 are connected to the two power input pins of relay K via wires. The two control power input pins of relay K are connected to the two poles of the AC 220V power supply via wires. The two normally open contacts of relay K are connected to the power input pins 1 and 2 of AC to DC power module A5 via wires. The power input pins 1 and 2 of the receiver and transmitter of photoelectric switch A3 are connected to the power output pins 3 and 4 of a power module A7 via wires. The power input pins 1 and 2 of power module A7 (installed in the electrical control box) are connected to the two poles of the AC 220V power supply via wires.

[0023] Figure 1 , 2As shown in Figures 3, 4, 5, and 6, after the 220V AC power enters the power input terminal of power module A7, pins 3 and 4 of power module A7 output a stable 12V DC power supply, which enters the power input terminal of photoelectric switch A3, energizing and operating photoelectric switch A3. When no vehicle enters the site, pin 3 of the receiving terminal of photoelectric switch A3 does not output power (the infrared light emitted by the transmitting terminal of photoelectric switch A3 is not blocked, and pin 3 of the receiving terminal of photoelectric switch A3 does not output a high level), relay K will not be energized, and the main control circuit board A4 will not be energized or operate. When a vehicle enters the site, pin 3 of the photoelectric switch A3 receives a high-level signal, which enters the power input terminal of the main control circuit board A4 (the vehicle blocks the infrared light emitted by the transmitter of the photoelectric switch A3, causing pin 3 of the photoelectric switch A3 to output a high level). The main control circuit board A4 will then be powered on. Subsequently, pins 7 and 8 of the main control circuit board A4 output power to the power input terminal of the relay K. The relay K will be energized and its control power input terminal and normally open contact terminal will close (when no vehicle enters, the main control circuit board and all subsequent circuits are de-energized, achieving energy saving and extending the service life of related circuits). The AC-to-DC power module A5 will then be powered on. After the main control circuit board A4 is powered on, the control unit uses artificial intelligence to control the four sets of motor reduction mechanisms M2 to drive the electric car body to move from left to right and from right to left on track 1. (Pin 5 and pin 6 of the main control circuit board A4 output positive and negative power and negative and positive power respectively to the positive and negative and negative and positive power input terminals of the four sets of motor reduction mechanisms M2. The power output shaft of the four sets of motor reduction mechanisms M2 drives the wheels 6 to move left or right along the track. The electric car can automatically stop when it reaches the end points on both sides of the track.) Subsequently, the power output from the AC to DC power module A5 supplies power to the two sets of sliding contact power supply mechanisms through the two tracks 1, the two rotating slip rings 9, and the two fixed contact pieces 10 (since there are no wires connected to the electric car, the problem of wire entanglement is prevented).

[0024] Figure 1 , 2As shown in Figures 3, 4, 5, and 6, the front of multiple vehicles can be simultaneously parked laterally at a distance on the upper end of the deep pit 4. After the vehicles are parked, the drivers can intuitively understand the positions of the contact plate 18 and contact piece CZ1 on the deep pit based on the video data captured by the camera SX and displayed on the screen XS. By controlling the power switches S1 and S2, the drivers can energize the positive and negative or negative and positive power input terminals of the two sets of electric linear slides M and M3 respectively. This allows the drivers to control the first set of electric linear slides M to move the contact plate 18 and contact piece CZ1 forward or backward, and control the second set of electric linear slides M3 to move the contact plate 18 and contact piece CZ1 left or right. When the contact plate 18 and contact piece CZ1 are vertically positioned in the middle of the upper end of the deep pit, the drivers can turn off the power switches and enter the automatic charging process without leaving the site (providing convenience for the drivers, who can leave the site to handle other matters). As the electric trolley moves left or right, the wireless camera A6 transmits the captured image of the vehicle's lower end to the receiving unit. The receiving unit then outputs the data to the control unit. Based on artificial intelligence, the control unit stops working when the wireless camera A6 is located below the corresponding vehicle QR code 14 (the control unit controls the four sets of motor reduction mechanisms to stop driving the vehicle body to move on the track; the contact piece CZ1 at the lower end of the vehicle is vertically located above the copper slide rod CT of the two sets of sliding contact devices). Then, pins 3 and 4 of the main control circuit board A4 output positive and negative power to the electric telescopic rod M1. At the positive and negative power input terminals, the movable column of the electric telescopic rod M1 pushes the copper sliding rods CT of the two sets of sliding contact devices upward. When the upper ends of the contact balls 17 of the copper sliding rods CT of the two sets of sliding contact devices respectively contact the two contact pieces CZ1, the control unit locates the position via image data wirelessly transmitted by the wireless camera and no longer controls the electric telescopic rod M1 to receive power. In this way, the upper ends of the contact balls 17 of the copper sliding rods CT of the two sets of sliding contact devices respectively contact the two contact pieces CZ1. Subsequently, the AC to DC power module A5 outputs DC power to charge the vehicle's battery G1. Before the AC-to-DC power module A5 outputs power, the control unit will control the prompt unit to push a login APP prompt to the car owner (the control unit analyzes the car owner's information data, including phone number, through QR code and pushes a text message to the car owner's mobile phone). After the car owner receives the prompt, logs in to the APP and selects the charging option, the control unit controls the AC-to-DC power module A5 to output DC power to charge the battery G1 (that is, the power output from pins 7 and 8 of the main control circuit board A4 is sent to the power input terminal of the relay K. The relay K is energized and its control power input terminal and normally open contact terminal are closed, and the AC-to-DC power module A5 is energized and works).During charging, the metering unit counts the amount of electricity the vehicle is charging and calculates the charge based on that amount. Once fully charged, the billing unit deducts the charge from the vehicle owner's account, and a full charge notification is sent to the display unit via the notification unit. Upon receiving the notification, the vehicle owner can see the charging amount and cost data displayed on the display unit. (In this invention, the notification unit prompts the vehicle owner to log in to the app to confirm charging and sends full charge notifications via SMS. SMS messages are sent at regular intervals until the vehicle owner logs in to the app, confirms charging, and selects the charging completion option, thus providing a better notification effect.) In this invention, if the vehicle owner fails to confirm charging within the specified time, the control unit will move the electric vehicle to an adjacent vehicle to charge it, improving charging efficiency.

[0025] Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, in the full charge indication circuit, when the vehicle is charging and the current at the AC-to-DC power input terminal of the A5 power module is high (i.e., the vehicle battery charging current is high and it is not fully charged), the power supply voltage output from the secondary side of the voltage transformer T (one end of which is grounded) enters the power input terminals 1 and 2 of the rectifier bridge A5, which are relatively high. The power output from pins 3 and 4 of the rectifier bridge A5 is filtered by capacitor C1, divided by adjustable resistors RP1 and R1, and reduced and current-limited by resistor R2 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, which enters the negative power input terminal of relay K1. Relay K1 is energized and its control power input terminal and normally closed contact terminal are open. In this way, pin 9 of the main control circuit board A4 does not input a high-level signal, and the indication unit will not send a full charge indication message. When the vehicle is fully charged, because the current at the power input terminal of the AC-to-DC power module A5 is lower than the threshold (e.g., 50 mA), the power supply voltage output from the secondary side of the voltage transformer T enters the power input terminals 1 and 2 of the rectifier bridge A5 at a lower voltage. The power output from pins 3 and 4 of the rectifier bridge A5 is filtered by capacitor C1, divided by adjustable resistors RP1 and R1, and then reduced and current-limited by resistor R2 before entering the NPN transistor Q1. The base voltage is lower than 0.7V, so the NPN transistor Q1 is cut off and the collector no longer outputs a low level to the negative power input terminal of relay K1. The relay K1 is de-energized and no longer engages its control power input terminal and normally closed contact terminal. Thus, a high-level signal is input to pin 9 of the main control circuit board A4, and the prompt unit will send a full charge prompt message. After receiving the prompt, the vehicle driver can promptly go to the site and drive the vehicle away.

[0026] Figure 1 , 2As shown in Figures 3, 4, 5, and 6, after the vehicle is fully charged, pins 3 and 4 of the main control circuit board A4 output positive and negative power to the power input terminal of the electric push rod M1. The movable column of the electric push rod M1 then lowers the contact balls 17 of the copper sliding rods CT of the two sets of sliding contact devices. After the copper sliding rods CT of the two sets of sliding contact devices effectively separate from the contact piece CZ1 at the lower end of the vehicle (with an interval of approximately 10 cm), the main control circuit board, under the action of the control unit, controls the electric trolley to automatically charge the next vehicle from left to right or from right to left. This process is completely consistent with the above, and the invention can also automatically charge and charge the next vehicle. This invention can be conveniently constructed along roadsides, allowing vehicle owners to leave the site without waiting and return to the mobile parking space after being notified when the vehicle is fully charged, thus providing convenience for drivers and facilitating the charging of electric vehicles, demonstrating good application prospects. Photoelectric switch A3 is a finished product of a through-beam infrared photoelectric switch, operating at DC 12V. Its receiver has three connection wires: pins 1 and 2 are the power input wires, and pin 3 is the signal output wire. When the infrared beam emitted by the transmitter is blocked by an object within a maximum range of 50 meters, pin 3 of the signal output wire will output a high level; otherwise, it will not output a high level. The motor reduction mechanism M2 is a finished product of a 100W coaxial motor gear reducer. Resistors R1 and R2 have resistance values ​​of 10KΩ and 47KΩ respectively. NPN Transistor Q1 is model 9013; relays K and K1 are model DC12V; adjustable resistor RP1 is 470K (adjusted to 13.2K in this embodiment; the larger the resistance value, the greater the voltage drop and the smaller the inverse value); electric telescopic pole M2 is a reciprocating electric telescopic pole with a working voltage of DC 12V; power module A7 is a finished product of AC 220V to DC 12V switching power supply module; voltage transformer T is a unidirectional voltage transformer; display screen XS is a 4-inch LCD display screen; capacitor C1 is a 470μF / 25V electrolytic capacitor.

[0027] 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.

[0028] 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. An electric vehicle charging system comprising a track, an electric trolley, an AC-DC power module, a photoelectric switch, a master control module, a wireless camera, characterized in that, The application also has a power supply mechanism, a power receiving mechanism, a full power prompting circuit, a receiving unit, a control unit, a fee deduction unit, a metering unit, a display unit and a prompting unit. The receiving unit, the control unit, the fee deduction unit, the metering unit and the prompting unit are application software in the main control module, and the display unit is application software in the smart phone of each vehicle owner. The AC-DC power supply module, the main control module and the transmitting end of the photoelectric switch are installed in the electric control box. A deep pit is excavated under the road surface of the charging area. The electric control box is installed on one side end of the deep pit. The receiving end of the photoelectric switch is installed on the other side end of the deep pit. Two sets of tracks are laid in the lower end of the deep pit. The side ends of the two sets of tracks and the power output ends of the AC-DC power supply module are electrically connected. The outer side end of the power output shaft of two sets of motor speed reduction mechanisms of the electric trolley is insulated and installed with a conductive ring. The two side ends of the vehicle body are insulated and installed with contact sheets. The contact sheets and the outer side end of the conductive ring are in contact. The outer side of the wheels of the electric trolley has a guide groove. The guide groove of the wheels is located on the outer side of the upper end of the track. The power supply mechanism comprises an electric push rod, a sliding contact device and a support plate. The support plate is installed on the movable rod of the electric push rod. The sliding contact device has two sets. The lower ends of the two sets of sliding contact devices are installed on the upper ends of the two sides of the support plate. A camera is installed on the front part of the upper end of the support plate. The upper ends of the two contact sheets are electrically connected with the two sets of sliding contact devices and the wireless camera. The lower end of the electric push rod is installed on the upper part of the electric trolley. Each vehicle is installed with one set of power receiving mechanism. Each set of power receiving mechanism comprises an electric linear slide, a camera, a display screen, a power switch and a contact plate. One set of electric linear slide is installed on the lower outer end of the vehicle longitudinally. The second set of electric linear slide is installed on the lower end of the sliding block of the first set of electric linear slide transversely. The contact plate is installed on the lower end of the sliding block of the second set of electric linear slide. Two contact sheets A are installed on the lower end of the contact plate. The two contact sheets A are electrically connected with the two poles of the battery on the vehicle. The camera is installed on the lower part of the vehicle body. The other end of the sliding block of the second set of electric linear slide is bonded with a two-dimensional code containing the information of the vehicle owner. The power output end of the main control circuit board is electrically connected with the motor speed reduction mechanism of the electric trolley and the power input end of the electric push rod. The signal output end of the full power prompting circuit is electrically connected with the signal input end of the main control circuit board. The matching voltage transformer of the full power prompting circuit is sleeved on the outer side of the phase power input end of the AC-DC power supply module. The receiving unit can receive the video data sent by the wireless camera and output the data to the control unit. The control unit can control the motor speed reduction mechanism to drive the vehicle body of the electric trolley to move on the track. When there is a vehicle on the corresponding position of the upper end of the wireless camera, the output power is stopped, and then the electrically active column of the electric telescopic rod is controlled to go up. After the two contact sheets A on the lower end of the vehicle are contacted by the sliding rods of the two sets of sliding contact devices, the electric telescopic rod is controlled to lose power. After the vehicle is fully charged, the control unit can control the sliding rods of the two sets of sliding contact devices and the contact sheets A to separate for charging the next vehicle.The sliding rod of the two sets of sliding contact devices contacts the contact sheet A at the lower end of the vehicle, the control unit pushes the login prompt to the vehicle owner, after the vehicle owner receives the prompt, logs in the APP and selects the charging option, the control unit controls the AC to DC power supply module to output the DC power supply; the metering unit counts the electric quantity of the vehicle charging, and charges according to the electric quantity, the fee deduction unit deducts the fee of the vehicle owner after the vehicle is fully charged, and sends the full charge prompt information to the display unit, the vehicle owner receives the prompt information, and can display the charging quantity data and the fee data through the display unit; the receiving end of the photoelectric switch is matched with a relay, the power output end of the receiving end of the photoelectric switch and the power input end of the main control module are electrically connected, the control power output end of the main control module and the two power input ends of the relay are electrically connected respectively, and the two normally open contact ends of the relay and the power input ends of the AC to DC power supply module are electrically connected respectively.

2. An electric vehicle charging system according to claim 1, wherein, The sliding contact device comprises a sleeve, a spring, a sliding rod, the lower end of the spring is installed in the lower end of the sleeve, the lower end of the sliding rod is installed on the upper end of the spring and the lower part of the sliding rod is located in the upper part of the sleeve, the upper end of the sliding rod is installed with a contact ball, and the lower end of the sleeve is installed on a support plate.

3. The electric vehicle charging system of claim 1, wherein, The display screen and the power switches are installed on the vehicle driving platform, and the power output ends of the two power switches and the power input ends of the two sets of electric linear slides are electrically connected respectively.

4. The electric vehicle charging system of claim 1, wherein, The full power prompting circuit comprises a voltage transformer, an adjustable resistor, a resistor, an NPN triode and a relay, a rectifier bridge stack and a capacitor which are electrically connected, two wiring ends of the secondary side of the voltage transformer and two power input ends of the rectifier bridge stack are electrically connected respectively, the positive power output end of the rectifier bridge stack and the positive electrode of the capacitor, one end of the adjustable resistor, the positive electrode of the relay and the control power input end are connected, the other end of the adjustable resistor and one end of the first resistor and one end of the second resistor are connected, the other end of the second resistor and the base of the NPN triode are connected, the collector of the NPN triode and the negative electrode power input end of the relay are connected, and the other end of the first resistor and the emitter of the NPN triode are connected.

5. The electric vehicle charging system of claim 1, wherein, The electric car can stop automatically when moving to the end stop of the track.

Images