Wireless charging system for electric vehicle

Abstract

The invention discloses an electric vehicle wireless charging system, and belongs to the technical field of electric vehicle wireless charging, the electric vehicle wireless charging system comprises a base and a vehicle body, the top of the base is fixedly provided with a supporting plate, the top of the supporting plate is provided with a control screen, one side of the supporting plate is provided with a placing plate, and the top of the placing plate is provided with a transmitting coil. Through cooperative work of components such as a push rod, a hinge rod, a sliding rod, sliding blocks and a hook, a receiving coil can be automatically expanded according to needs, the coupling area of a magnetic field is increased, so that the charging efficiency is improved, through the design of a plurality of arc-shaped grooves, movable shafts, limiting grooves and limiting blocks, the distance between the sliding blocks can be orderly increased in the moving process, and the charging efficiency is improved. In addition, due to the arrangement of the winding roller and the coil spring, the cable can be automatically wound, unwound and reset when the receiving coil is expanded and contracted, and the automation degree and reliability of the system are further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless charging for electric vehicles, and more specifically, relates to a wireless charging system for electric vehicles. Background Art

[0002] Wireless charging does not require a cable connection between the vehicle and the power supply system. The charging device can be flexibly arranged in places such as parking lots, residences, and roadside, making it possible for electric vehicles to charge anywhere and anytime. The popularization and application of high-power wireless charging technology can greatly improve the convenience of charging electric vehicles, and thus can reduce the usage of in-vehicle batteries and extend the vehicle's cruising range. The breakthrough of this technology will strongly promote the development and popularization of electric vehicles in China and drive the booming development of wireless charging technology in other related fields;

[0003] Existing wireless charging technologies have slow charging speeds during charging, and it is difficult to maintain the best charging effect according to different vehicle models. Moreover, during charging, generally the vehicle needs to be driven to a fixed position, resulting in poor flexibility in use;

[0004] To solve the above problems, a wireless charging system for electric vehicles is proposed in this application. Summary of the Invention

[0005] In view of the problems in the related art, the present invention provides a wireless charging system for electric vehicles to overcome the above technical problems existing in the related art.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A wireless charging system for electric vehicles includes a base and a vehicle body. A support plate is fixedly installed on the top of the base, an operation screen is installed on the top of the support plate, a placement plate is provided on one side of the support plate, a transmitting coil is installed on the top of the placement plate, a mounting plate is rotatably connected to the bottom of the vehicle body, a receiving coil is installed at the bottom of the mounting plate, and a storage battery is installed on the top of the base;

[0008] A lifting mechanism, including a fixing plate, the fixing plate is fixedly installed on one side of the support plate, a lifting cylinder is rotatably connected to one side of the fixing plate, a positioning plate is rotatably connected to the piston of the lifting cylinder, and the positioning plate is fixedly connected to the placement plate;

[0009] A heat dissipation mechanism, including a fan blade, a positioning shaft is rotatably connected to the placement plate, the fan blade is fixedly installed at the bottom end of the positioning shaft, and the fan blade cooperates with the transmitting coil;

[0010] The expansion mechanism includes a plurality of sliding rods. A plurality of the sliding rods are movably installed at the bottom of the mounting plate. A plurality of sliders are provided on the sliding rods. Among the plurality of sliders, the slider close to the end of the sliding rod is fixedly connected to the sliding rod, and the other sliders are slidably connected to the sliding rod. A hook is installed at the bottom of the slider, and the hook cooperates with the receiving coil.

[0011] Preferably, the lifting mechanism further includes four positioning rods. The four positioning rods are rotatably installed on the fixed plate, and the other end of the positioning rod is rotatably connected to the positioning plate.

[0012] Through the rotational connection of the positioning rod with the fixed plate and the positioning plate, the angle of the positioning plate can be limited, so that when the lifting cylinder pushes the positioning plate, it is convenient for the positioning plate to move upward in parallel with the placement plate.

[0013] Preferably, the heat dissipation mechanism further includes three rotor magnets. The three rotor magnets are fixedly installed on the positioning shaft, and the rotor magnets cooperate with the transmitting coil.

[0014] Under the action of the high-frequency magnetic field on the transmitting coil, the rotor magnet rotates, and then the fan blade can be driven to rotate through the positioning shaft, so as to blow and dissipate heat from the transmitting coil and the receiving coil.

[0015] Preferably, a protective frame is fixedly installed at the bottom of the placement plate. Two isolation nets are installed inside the protective frame. The fan blade is located inside the isolation net, and a plurality of guide holes are provided on the placement plate, and the guide holes cooperate with the fan blade.

[0016] Through the arrangement of the protective frame and the isolation net, it is convenient to isolate and protect the fan blade. At the same time, through the arrangement of the guide holes, the flowing air formed when the fan blade rotates is guided.

[0017] Preferably, the expansion mechanism further includes a push rod. The push rod is slidably installed at the bottom of the vehicle body. A plurality of hinge rods are vertically hinged to the push rod, and the hinge rods are rotatably connected to the corresponding sliding rods.

[0018] By moving the push rod to push the hinge rod to move, and the hinge rod is rotatably connected to the sliding rod, the sliding rod can be pushed to move, and then the slider at the top of the sliding rod can be driven to move, so as to expand the outer receiving coil and increase the magnetic field coupling area.

[0019] Preferably, a fixed roller is fixedly installed on the push rod. An activity hole is provided on the mounting plate. The fixed roller is movably connected to the activity hole. A driving bent groove is provided on the fixed roller. An activity block is slidably connected to the inner wall of the activity hole, and the activity block is slidably connected to the driving bent groove.

[0020] The moving fixed roller is slidably connected to the movable block through the driving bent groove, so as to drive the mounting plate to rotate at an angle, and the mounting plate drives a plurality of sliding rods to move.

[0021] Preferably, a plurality of arc grooves are formed in the bottom of the mounting plate. The inner wall of the arc groove is slidably connected with a movable shaft. The movable shaft is fixedly connected with the corresponding slider. The radian of the plurality of arc grooves on the same horizontal straight line gradually increases. A limiting groove is formed in the top inner wall of the arc groove. The inner wall of the limiting groove is slidably connected with a limiting block. The limiting block is fixedly connected with the corresponding movable shaft.

[0022] Through the sliding connection between the movable shaft and the arc groove, the rotating mounting plate can drive the sliding rod to move. At the same time, the hinge rod is vertically hinged to the push rod, so as to limit the sliding rod in the horizontal direction, so that the sliding rod can only move in a straight line in the horizontal direction at the bottom of the mounting plate. The radian of the plurality of arc grooves on the same horizontal straight line gradually increases, so that when the slider moves, the distance between the sliders can be gradually increased, so as to orderly expand the receiving coil and keep stable when inductively receiving the magnetic field. At the same time, the sliding connection between the limiting block and the limiting groove can limit the sliding rod on the mounting plate through the movable shaft.

[0023] Preferably, two fixing blocks are fixedly installed on the top of the mounting plate. A same winding roller is rotatably connected between the two fixing blocks. The winding roller is wound and connected with one end of the receiving coil. A torsion spring is installed at one end of the winding roller. One end of the torsion spring is fixedly connected with the corresponding fixing block.

[0024] Through the winding of the receiving coil by the winding roller, the cable can be wound and released when the receiving coil expands, and through the setting of the torsion spring, the receiving coil can be automatically wound and reset.

[0025] Preferably, a rectangular block is fixedly installed at the top end of the push rod. The rectangular block is slidably connected with the bottom of the vehicle body.

[0026] Through the sliding connection between the rectangular block and the vehicle body, the push rod can be limited to prevent the push rod from rotating with the mounting plate.

[0027] Preferably, four symmetrically arranged rotating wheels are rotatably connected to the bottom of the base. Four symmetrically arranged L-shaped support legs are rotatably connected to the top of the base. Four symmetrically arranged positioning cylinders are rotatably connected to the top of the base. The piston of the positioning cylinder is rotatably connected with the corresponding L-shaped support leg. An air pump is fixedly installed on the top of the base.

[0028] By the action of the positioning cylinder on the L-shaped support leg, the L-shaped support leg can be pushed to change its angle, and then the base can be fixedly supported by the L-shaped support leg, so that the device can be stably placed. At the same time, the setting of the rotating wheel facilitates the movement of the device and enables flexible charging of the vehicle. The setting of the air pump can provide a power source for the positioning cylinder and the lifting cylinder.

[0029] In summary, the technical effects and advantages of the present invention are as follows:

[0030] Through the cooperation of the lifting cylinder, the positioning plate, the fixing plate and the positioning rod, the lifting height and angle of the placing plate can be accurately controlled to ensure that the transmitting coil and the receiving coil are accurately aligned, facilitating the realization of stable wireless charging. The positioning rod limits the angle of the positioning plate, making the placing plate keep parallel during the lifting process, improving the stability and reliability of charging.

[0031] Utilize the interaction between the high-frequency magnetic field generated by the transmitting coil and the rotor magnet to drive the fan blade to rotate by the positioning shaft, realizing active heat dissipation for the transmitting coil and the receiving coil. This non-contact heat dissipation method does not require an additional heat dissipation driving device, which not only simplifies the structure but also improves the efficiency and stability of the system. At the same time, the design of the protective frame and the isolation net not only protects the fan blade but also effectively guides the flowing air through the guide holes, enhancing the heat dissipation effect.

[0032] Through the coordinated operation of components such as the push rod, the articulated rod, the sliding rod, the slider, and the hook, the receiving coil can be automatically expanded as needed, increasing the coupling area of the magnetic field and thus improving the charging efficiency. The design of multiple arc-shaped grooves, movable shafts, limit grooves, and limit blocks enables the sliders to orderly increase the distance between each other during the movement, ensuring the uniformity and stability of the expansion of the receiving coil. In addition, the setting of the wire winding roller and the coil spring can automatically wind and unwind the cable and reset it when the receiving coil expands and contracts, further improving the automation degree and reliability of the system.

[0033] The rotating wheels at the bottom of the base facilitate the movement of the entire charging system and can be flexibly placed at different positions to charge the vehicle. The design of the L-shaped support leg and the positioning cylinder can stably support the base during charging, ensuring the stability of the system during operation. The air pump provides a power source for the positioning cylinder and the lifting cylinder, realizing the coordinated operation of each part of the system and improving the overall convenience and practicality. At the same time, the setting of the storage battery enables the system to charge a moving vehicle without being connected to a fixed power source, increasing the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2It is a bottom view structural schematic diagram of the present invention;

[0036] Figure 3 It is a schematic diagram of the heat dissipation mechanism structure of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the mounting plate and the expansion mechanism of the present invention;

[0038] Figure 5 It is a schematic diagram of the push rod and roller structure of the present invention;

[0039] Figure 6 This is a bottom view of the structure of the mounting plate of the present invention;

[0040] Figure 7 This is a schematic diagram of the top view of the mounting plate of the present invention;

[0041] Figure 8 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0042] Figure 9 It is a schematic diagram of the side cross-sectional structure of the mounting plate of the present invention;

[0043] Figure 10 For the present invention Figure 7 Schematic diagram of the structure of part A.

[0044] In the figure:

[0045] 1. Base; 2. Support plate; 3. Placement plate; 4. Car body; 5. Mounting plate; 6. Lifting mechanism; 61. Fixing plate; 62. Positioning plate; 63. Positioning rod; 64. Lifting cylinder; 7. Heat dissipation mechanism; 71. Positioning shaft; 72. Fan blade; 73. Protective frame; 74. Rotor magnet; 75. Isolation net; 76. Guide hole; 8. Expansion mechanism; 81. Sliding rod; 82. Sliding block; 83. Hook; 84. Push rod; 85. Articulated rod; 86, fixed roller; 87, driving curved groove; 88, movable block; 89, movable hole; 9, transmitting coil; 10, receiving coil; 11, arc groove; 12, movable shaft; 13, limit groove; 14, limit block; 16, fixed block; 17, coil spring; 18, winding roller; 19, control screen; 20, battery; 21, air pump; 22, L-shaped supporting leg; 23, positioning cylinder; 24, rotating wheel; 25, rectangular block. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Reference Figures 1-10, an electric vehicle wireless charging system, including a base 1 and a vehicle body 4. A support plate 2 is fixedly installed on the top of the base 1. An operation screen 19 is installed on the top of the support plate 2. A placement plate 3 is provided on one side of the support plate 2. A transmitting coil 9 is installed on the top of the placement plate 3. The bottom of the vehicle body 4 is rotatably connected to a mounting plate 5. A receiving coil 10 is installed at the bottom of the mounting plate 5. A storage battery 20 is installed on the top of the base 1;

[0048] A lifting mechanism 6, including a fixing plate 61, the fixing plate 61 is fixedly installed on one side of the support plate 2. A lifting cylinder 64 is rotatably connected to one side of the fixing plate 61. A positioning plate 62 is rotatably connected to the piston of the lifting cylinder 64. The positioning plate 62 is fixedly connected to the placement plate 3;

[0049] A heat dissipation mechanism 7, including a fan blade 72. A positioning shaft 71 is rotatably connected to the placement plate 3. The fan blade 72 is fixedly installed at the bottom of the positioning shaft 71. The fan blade 72 cooperates with the transmitting coil 9;

[0050] An expansion mechanism 8, including a plurality of sliding rods 81. The plurality of sliding rods 81 are movably installed at the bottom of the mounting plate 5. A plurality of sliding blocks 82 are provided on the sliding rods 81. Among the plurality of sliding blocks 82, the sliding block 82 close to the end of the sliding rod 81 is fixedly connected to the sliding rod 81, and the other sliding blocks 82 are slidably connected to the sliding rod 81. A hook 83 is installed at the bottom of the sliding block 82. The hook 83 cooperates with the receiving coil 10.

[0051] Refer to Figure 1 and Figure 8 , the lifting mechanism 6 further includes four positioning rods 63. The four positioning rods 63 are rotatably installed on the fixing plate 61, and the other end of the positioning rod 63 is rotatably connected to the positioning plate 62. By the rotational connection of the positioning rod 63 with the fixing plate 61 and the positioning plate 62, the angle of the positioning plate 62 can be limited, so that when the lifting cylinder 64 pushes the positioning plate 62, it is convenient for the positioning plate 62 to move upward parallel to the placement plate 3.

[0052] Refer to Figure 3, the heat dissipation mechanism 7 further includes three rotor magnets 74, the three rotor magnets 74 are fixedly installed on the positioning shaft 71, and the rotor magnets 74 cooperate with the transmitting coil 9. A protective frame 73 is fixedly installed at the bottom of the placement plate 3. Two isolation nets 75 are installed inside the protective frame 73. The fan blades 72 are located inside the isolation nets 75, and a plurality of guide holes 76 are formed in the placement plate 3. The guide holes 76 cooperate with the fan blades 72. Under the action of the high-frequency magnetic field on the transmitting coil 9, the rotor magnets 74 rotate, and then the fan blades 72 can be driven to rotate through the positioning shaft 71, so as to blow air to cool the transmitting coil 9 and the receiving coil 10. Through the arrangement of the protective frame 73 and the isolation nets 75, it is convenient to isolate and protect the fan blades 72. At the same time, through the arrangement of the guide holes 76, the flowing air formed when the fan blades 72 rotate is guided.

[0053] Refer to Figure 4, the expansion mechanism 8 further includes a push rod 84 which is slidably installed at the bottom of the vehicle body 4. The push rod 84 is vertically hinged with a plurality of hinge rods 85. The hinge rods 85 are rotatably connected to the corresponding sliding rods 81. A fixed roller 86 is fixedly installed on the push rod 84. An activity hole 89 is formed in the mounting plate 5. The fixed roller 86 is movably connected to the activity hole 89. A driving bent groove 87 is formed in the fixed roller 86. An activity block 88 is slidably connected to the inner wall of the activity hole 89. The activity block 88 is slidably connected to the driving bent groove 87. A plurality of arc grooves 11 are formed in the bottom of the mounting plate 5. An activity shaft 12 is slidably connected to the inner wall of the arc groove 11. The activity shaft 12 is fixedly connected to the corresponding slider 82. The radian of the plurality of arc grooves 11 on the same horizontal straight line gradually increases. A limiting groove 13 is formed in the top inner wall of the arc groove 11. A limiting block 14 is slidably connected to the inner wall of the limiting groove 13. The limiting block 14 is fixedly connected to the corresponding activity shaft 12. By moving the push rod 84 to push the hinge rod 85 to move, the hinge rod 85 can push the sliding rod 81 to move through the rotational connection with the sliding rod 81, and then can drive the slider 82 at the top of the sliding rod 81 to move, so as to expand the peripheral receiving coil 10 and increase the coupling area of the magnetic field. The moving fixed roller 86 can drive the mounting plate 5 to rotate at an angle through the sliding connection between the driving bent groove 87 and the activity block 88. The mounting plate 5 drives a plurality of sliding rods 81 to move. Through the sliding connection between the activity shaft 12 and the arc groove 11, the rotating mounting plate 5 can drive the sliding rod 81 to move. At the same time, the vertical hinge connection between the hinge rod 85 and the push rod 84 can limit the sliding rod 81 in the horizontal direction, so that the sliding rod 81 can only move in a straight line in the horizontal direction at the bottom of the mounting plate 5. The radian of the plurality of arc grooves 11 on the same horizontal straight line gradually increases, so that when the slider 82 moves, the distance between the respective sliders 82 can be gradually increased, so as to orderly expand the receiving coil 10 and keep stable when inductively receiving the magnetic field. At the same time, the sliding connection between the limiting block 14 and the limiting groove 13 can limit the sliding rod 81 on the mounting plate 5 through the activity shaft 12.

[0054] Refer to Figure 7 , two fixing blocks 16 are fixedly installed on the top of the mounting plate 5. The same winding roller 18 is rotatably connected between the two fixing blocks 16. The winding roller 18 is wound and connected to one end of the receiving coil 10. A winding spring 17 is installed at one end of the winding roller 18. One end of the winding spring 17 is fixedly connected to the corresponding fixing block 16. By winding the receiving coil 10 by the winding roller 18, the cable of the receiving coil 10 can be wound and released during expansion, and through the setting of the winding spring 17, the receiving coil 10 can be automatically wound and reset.

[0055] Refer to Figure 7, a rectangular block 25 is fixedly installed at the top end of the push rod 84. The rectangular block 25 is slidably connected to the bottom of the vehicle body 4. Through the sliding connection between the rectangular block 25 and the vehicle body 4, the push rod 84 can be limited, preventing the push rod 84 from rotating with the mounting plate 5.

[0056] Refer to Figure 1 , four symmetrically arranged rotating wheels 24 are rotatably connected to the bottom of the base 1, four symmetrically arranged L-shaped support legs 22 are rotatably connected to the top of the base 1, and four symmetrically arranged positioning cylinders 23 are rotatably connected to the top of the base 1. The piston of the positioning cylinder 23 is rotatably connected to the corresponding L-shaped support leg 22. An air pump 21 is fixedly installed on the top of the base 1. Through the action of the positioning cylinder 23 on the L-shaped support leg 22, the L-shaped support leg 22 can be pushed to change its angle, and then the base 1 can be fixedly supported through the L-shaped support leg 22, so that the device can be stably placed. At the same time, the arrangement of the rotating wheels 24 can facilitate the movement of the device and the flexible charging of the vehicle. The arrangement of the air pump 21 can facilitate the provision of a power source for the positioning cylinder 23 and the lifting cylinder 64.

[0057] Working principle: During operation, the base 1 is moved to one side of the vehicle body 4 through the rotating wheel 24, and the placement plate 3 is placed below the mounting plate 5. The switch of the lifting cylinder 64 is activated. The piston of the lifting cylinder 64 drives the positioning plate 62 to move up and down. The positioning plate 62 drives the placement plate 3 to move up and down, thereby driving the placement plate 3 to push the push rod 84, causing the moving push rod 84 to push the articulated rod 85 to move. The articulated rod 85 is rotationally connected to the sliding rod 81, so that it can push the sliding rod 81 to move, and further drive the slider 82 on the top of the sliding rod 81 to move, thereby expanding the peripheral receiving coil 10 and increasing the coupling area of the magnetic field. The moving fixed roller 86 is slidably connected to the driving groove 87 and the movable block 88, so that it can drive the mounting plate 5 to rotate at an angle. The mounting plate 5 drives a plurality of sliding rods 81 to move. Through the sliding connection of the movable shaft 12 and the arc-shaped groove 11, the rotating mounting plate 5 can drive the sliding rod 81 to move. At the same time, the articulated rod 85 is vertically hinged to the push rod 84, so that it can limit the sliding rod 81 in the horizontal direction, making the sliding rod 81 can only move in a straight line in the horizontal direction at the bottom of the mounting plate 5. The radian of the arc-shaped grooves 11 on the same horizontal straight line gradually increases, so that when the slider 82 moves, the distance between each slider 82 can be gradually increased, so that the receiving coil 10 can be expanded orderly. Through the winding of the receiving coil 10 by the winding roller 18, the cable can be wound and released when the receiving coil 10 is expanded. Through the setting of the torsion spring 17, the receiving coil 10 can be automatically wound and reset. At the same time, through the action of the push rod 84, the distance between the transmitting coil 9 and the receiving coil 10 can be stabilized, so that the best charging distance can be maintained. When the transmitting coil 9 emits a high-frequency magnetic field, the magnetic field position at its bottom acts on the rotor magnet 74, causing the rotor magnet 74 to rotate, and then driving the fan blade 72 to rotate through the positioning shaft 71, so as to blow and dissipate heat from the transmitting coil 9 and the receiving coil 10. Through the setting of the protective frame 73 and the isolation net 75, it is convenient to isolate and protect the fan blade 72. At the same time, through the setting of the guide hole 76, the flowing air formed when the fan blade 72 rotates is guided. When the device is running, four positioning cylinders 23 are activated through the air pump 21. The piston of the positioning cylinder 23 pushes the L-shaped support leg 22 to change the angle. The L-shaped support leg 22 fixedly supports the base 1, so that the device can be stably placed. The setting of the storage battery 20 enables the vehicle to be moved and charged, which is convenient for flexible use.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wireless charging system for an electric vehicle, comprising a base (1) and a vehicle body (4), characterized in that, A support plate (2) is fixedly installed on the top of the base (1). A control screen (19) is installed on the top of the support plate (2). A placement plate (3) is provided on one side of the support plate (2). A transmitting coil (9) is installed on the top of the placement plate (3). The bottom of the vehicle body (4) is rotatably connected to a mounting plate (5). A receiving coil (10) is installed on the bottom of the mounting plate (5). A storage battery (20) is installed on the top of the base (1). A lifting mechanism (6), including a fixing plate (61), the fixing plate (61) is fixedly installed on one side of the support plate (2). A lifting cylinder (64) is rotatably connected to one side of the fixing plate (61). A positioning plate (62) is rotatably connected to the piston of the lifting cylinder (64). The positioning plate (62) is fixedly connected to the placement plate (3). A heat dissipation mechanism (7), including a fan blade (72), a positioning shaft (71) is rotatably connected to the placement plate (3). The fan blade (72) is fixedly installed at the bottom end of the positioning shaft (71). The fan blade (72) cooperates with the transmitting coil (9). An expansion mechanism (8), including a plurality of sliding rods (81), the plurality of sliding rods (81) are movably installed at the bottom of the mounting plate (5). A plurality of sliding blocks (82) are provided on the sliding rods (81). Among the plurality of sliding blocks (82), the sliding block (82) close to the end of the sliding rod (81) is fixedly connected to the sliding rod (81). The other sliding blocks (82) are slidably connected to the sliding rod (81). And a hook (83) is installed at the bottom of the sliding block (82). The hook (83) cooperates with the receiving coil (10).

2. The wireless charging system for an electric vehicle according to claim 1, characterized in that The lifting mechanism (6) further includes four positioning rods (63), the four positioning rods (63) are rotatably installed on the fixing plate (61), and the other end of the positioning rod (63) is rotatably connected to the positioning plate (62).

3. An electric vehicle wireless charging system according to claim 2, characterized in that, The heat dissipation mechanism (7) further includes three rotor magnets (74), the three rotor magnets (74) are fixedly installed on the positioning shaft (71), and the rotor magnets (74) cooperate with the transmitting coil (9).

4. The wireless charging system for an electric vehicle according to claim 3, wherein, A protective frame (73) is fixedly installed at the bottom of the placement plate (3). Two isolation nets (75) are installed inside the protective frame (73). The fan blade (72) is located inside the isolation net (75). And a plurality of guide holes (76) are provided on the placement plate (3). The guide holes (76) cooperate with the fan blade (72).

5. The wireless charging system for an electric vehicle according to claim 1, characterized in that, The expansion mechanism (8) further includes a push rod (84), the push rod (84) is slidably installed at the bottom of the vehicle body (4). The push rod (84) is vertically and hingedly connected to a plurality of hinge rods (85). The hinge rods (85) are rotatably connected to the corresponding sliding rods (81).

6. The wireless charging system for an electric vehicle according to claim 5, characterized in that, A fixed roller (86) is fixedly installed on the push rod (84). An activity hole (89) is provided on the mounting plate (5). The fixed roller (86) is movably connected to the activity hole (89). A driving bent groove (87) is provided on the fixed roller (86). An activity block (88) is slidably connected to the inner wall of the activity hole (89). The activity block (88) is slidably connected to the driving bent groove (87).

7. The wireless charging system for an electric vehicle according to claim 1, characterized in that, A plurality of arc-shaped grooves (11) are formed in the bottom of the mounting plate (5). A movable shaft (12) is slidably connected to the inner wall of the arc-shaped groove (11). The movable shaft (12) is fixedly connected to the corresponding slider (82). The radian of the plurality of arc-shaped grooves (11) on the same horizontal straight line gradually increases. A limiting groove (13) is formed in the top inner wall of the arc-shaped groove (11). A limiting block (14) is slidably connected to the inner wall of the limiting groove (13). The limiting block (14) is fixedly connected to the corresponding movable shaft (12).

8. A wireless charging system for an electric vehicle according to claim 1, wherein, Two fixing blocks (16) are fixedly installed on the top of the mounting plate (5). The same winding roller (18) is rotatably connected between the two fixing blocks (16). The winding roller (18) is wound and connected to one end of the receiving coil (10). A torsion spring (17) is installed at one end of the winding roller (18). One end of the torsion spring (17) is fixedly connected to the corresponding fixing block (16).

9. An electric vehicle wireless charging system according to claim 5, wherein, A rectangular block (25) is fixedly installed at the top end of the push rod (84). The rectangular block (25) is slidably connected to the bottom of the vehicle body (4).

10. A wireless charging system for an electric vehicle according to claim 1, characterized in that, Four symmetrically arranged rotating wheels (24) are rotatably connected to the bottom of the base (1). Four symmetrically arranged L-shaped support legs (22) are rotatably connected to the top of the base (1). Four symmetrically arranged positioning cylinders (23) are rotatably connected to the top of the base (1). The piston of the positioning cylinder (23) is rotatably connected to the corresponding L-shaped support leg (22). An air pump (21) is fixedly installed on the top of the base (1).

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