Mobile charging device for electric vehicle and use method

Abstract

The invention relates to the technical field of automobile charging, and discloses a mobile charging device for an electric automobile and a use method.The mobile charging device comprises a bottom supporting frame and a top plate frame, the bottom supporting frame and the top plate frame are connected through a supporting rod, and a charging device body is arranged on the bottom supporting frame; a lifting assembly for supporting the charging device body is arranged on the bottom supporting frame, and an electric plug connected with a vehicle for charging is arranged on the charging device body. The mobile design is adopted, civil construction is not needed, any parking space can be flexibly dispatched, and the charging resource utilization rate is remarkably increased; the locking mechanism achieves forking positioning, an electromagnetic generator attracts a side sliding block, a rolling pull rope is pulled to enable the two driven wheels to rotate reversely, the wheel forking state is formed, compared with traditional friction plate braking, the problem of slipping in rainy days or on the wet and slippery ground is avoided, positioning response is fast, stability is high, and the service life of the wheel is prolonged. The device is especially suitable for complex working conditions such as underground garages and outdoor wet pavements.

Description

Technical Field

[0001] This invention relates to the field of automotive charging technology, and more particularly to a mobile charging device and its usage method for electric vehicles. Background Technology

[0002] With the increasing popularity of electric vehicles, the layout and ease of use of charging infrastructure have become key factors affecting user experience. The mainstream charging solution is still based on fixed charging piles. However, fixed charging piles have the following technical problems in practical applications: Fixed charging piles require pre-planning of installation locations and rely on dedicated parking spaces and power access conditions, making it difficult to adapt to changes in the spatial layout of different parking lots. Once installed, fixed charging piles have limited service range, which can easily lead to resource mismatch problems such as some charging piles being idle and some areas having no charging piles available. Although some solutions have proposed the concept of mobile charging devices to address the above problems, existing mobile charging devices still have the following shortcomings in practical applications: traditional mobile chassis mostly use friction pad braking, which is prone to slipping and inaccurate positioning on wet or slippery ground or in narrow parking spaces.

[0003] To this end, we have designed a mobile charging device for electric vehicles and a method for using it. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that traditional mobile chassis in the prior art mostly use friction pad braking, which is prone to slippage and inaccurate positioning on wet or slippery ground or in narrow parking spaces. Therefore, this invention proposes a mobile charging device and method for use for electric vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A mobile charging device for electric vehicles includes a bottom support frame and a top plate frame, which are connected by a support rod. The charging device body is mounted on the bottom support frame, and a lifting component for supporting the charging device body is also mounted on the bottom support frame. The charging device body is equipped with an electrical plug for charging the vehicle. The bottom support frame is equipped with a roller assembly, which includes an electric drive wheel and two driven wheels. The bottom support frame is equipped with a reversing mechanism that drives the two driven wheels to rotate in the same direction, and a locking mechanism that pulls the two driven wheels to rotate relative to each other.

[0006] Preferably, a plug frame is fixed to the side wall of the charging device body, and the plug slides on the plug frame. The plug is connected to the charging device body through a cable. A fixing ring is fixed on the plug, and the fixing ring slides on the plug frame through a first electric push block and a first sliding groove. The top of the charging device is equipped with a limiting rod that slides through the top plate frame.

[0007] Preferably, the lifting component includes: The second slide is provided in multiple ways and is circumferentially opened on the top of the bottom support frame. A second electric push block slides in the second slide. The base plate has a buckle on its top that engages with the charging device body. A push rod is rotatably connected between the base plate and the second electric push block. Both ends of the push rod are rotatably connected to the base plate and the second electric push block via hinges.

[0008] Preferably, the bottom support frame has a built-in cavity, and the roller assembly further includes: The roller frame, the electric drive wheel and the two driven wheels are all mounted on the roller frame, and the two driven wheels rotate at the bottom of the bottom support frame via a rotating shaft and the roller frame. One end of the rotating shaft extends into the internal cavity.

[0009] Preferably, the electric drive wheel slides up and down within the built-in cavity via a lifting shaft and a roller frame. An electric lifter is installed inside the built-in cavity, and the output end of the electric lifter is connected to the lifting shaft. A drive motor for driving the electric drive wheel to rotate is installed on the roller frame.

[0010] Preferably, the reversing mechanism includes: The first meshing gear is fixed coaxially with the rotating shaft and is located in the built-in cavity. A meshing rack is also inserted through the built-in cavity and meshes with two first meshing gears. The built-in cavity also houses a drive motor, and the output end of the drive motor is coaxially fixed with a second meshing gear that meshes with the meshing rack.

[0011] Preferably, the reversing mechanism further includes an electric actuator also mounted on the bottom support frame, and the output end of the electric actuator is connected to and slidably connected to the meshing rack.

[0012] Preferably, the locking mechanism includes: There are two side slots, which are symmetrically opened on the inner wall of the built-in cavity. Side sliders slide in the side slots and slide in the side slots by means of a return spring. An electromagnetic generator is installed in the side slots. The side sliders are made of iron.

[0013] Preferably, the locking mechanism further includes: The take-up reel is fixed coaxially with the rotating shaft. A winding rope is wound around the outer wall of the take-up reel, and the other end of the winding rope is connected to the side slider.

[0014] The specific steps for using a mobile charging device for electric vehicles are as follows: S1: First, the vehicle to be charged drives to the parking area. Then, under the control of the control unit, the mobile charging device autonomously navigates to the target vehicle location. The user terminal initiates a charging request, the control unit plans the route and drives the device to the designated parking space, the user operates the charging gun to charge the vehicle, and the device automatically returns or stands by after charging is completed. S2: During the navigation of the bottom support frame to the vehicle to be charged, it is only necessary to turn on the drive motor to drive the electric drive wheel to rotate, and then turn on the drive motor to make the two driven wheels on the two rotating shafts rotate in the same direction, which can drive the device to the corresponding charging position.

[0015] S3: When the device moves to the charging port of the vehicle to be charged, the electric push rod and electromagnetic generator are activated, the winding rope is pulled, and the two rotating shafts are driven to rotate in opposite directions through the take-up wheel, which in turn causes the two driven wheels under the rotating shafts to rotate in opposite directions. This, together with the electric drive wheel, ensures that the positioning operation through wheel bifurcation can achieve rapid positioning and movement. S4: When charging is ready, multiple second electric push blocks are activated, allowing the second electric push blocks to slide in the second slide and then push the undercarriage to rise to accommodate different vehicles waiting to be charged; Turn on the electric lift and adjust the angle of the power plug to align with the charging port of the vehicle to be charged. Finally, the first electric drive block is activated, causing the electric plug to slide and extend on the plug holder and insert into the charging port of the vehicle to be charged, thus completing the charging operation.

[0016] The beneficial effects of this invention are as follows: 1. This invention adopts a mobile design, requires no civil construction, and can be flexibly dispatched to any parking space. It is suitable for scenarios such as renovation of old residential areas, emergency power replenishment, and temporary charging for large-scale events. One device can serve multiple parking spaces, significantly improving the utilization rate of charging resources and reducing the duplication of land and power resources.

[0017] 2. The present invention uses a locking mechanism to achieve "bifurcation positioning". The side slider is attracted by an electromagnetic generator, and the winding rope is pulled to make the two driven wheels rotate in opposite directions, forming a wheel bifurcation state. Compared with traditional friction pad braking, this method avoids the problem of slipping in rainy or wet ground. The positioning response is fast and the stability is high. It is especially suitable for complex working conditions such as underground garages and outdoor wet roads. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a mobile charging device for electric vehicles proposed in this invention. Figure 2 This is a side view of a mobile charging device for electric vehicles proposed in this invention; Figure 3This is a schematic diagram of the electrical plug in a mobile charging device for electric vehicles proposed in this invention. Figure 4 This is a schematic diagram of the lifting component in a mobile charging device for electric vehicles proposed in this invention; Figure 5 This is a schematic diagram of the drive component in a mobile charging device for electric vehicles proposed in this invention. Figure 6 This is a schematic diagram of the internal cavity in a mobile charging device for electric vehicles proposed in this invention; Figure 7 This is a side view of the bottom support frame in a mobile charging device for electric vehicles proposed in this invention. Figure 8 This is a state diagram of the bottom support frame in a mobile charging device for electric vehicles proposed in this invention.

[0019] In the diagram: 1. Bottom support frame; 2. Top plate frame; 3. Charging device body; 4. Limiting rod; 5. Support rod; 6. Plug frame; 7. Electrical plug; 8. Roller frame; 9. Driven wheel; 10. Cable; 11. Fixing ring; 12. First electric push block; 13. First slide groove; 14. Second slide groove; 15. Second electric push block; 16. Push rod; 17. Base plate; 18. Buckle; 19. Internal cavity; 20. Side groove; 21. Side slider; 22. Electromagnetic generator; 23. Return spring; 24. Winding rope; 25. Rotating shaft; 26. Take-up reel; 27. First meshing gear; 28. Drive motor; 29. ​​Second meshing gear; 30. Meshing rack; 31. Electric push rod; 32. Electric lifter; 33. Lifting shaft; 34. Electric drive wheel. Detailed Implementation

[0020] Reference Figures 1-8 A mobile charging device for electric vehicles includes a bottom support frame 1 and a top plate frame 2, which are connected by a support rod 5. A charging device body 3 is mounted on the bottom support frame 1. The charging device body 3 integrates an energy storage battery pack, a charging control module, an inverter module, etc., for providing charging services for electric vehicles. A plug frame 6 is fixed to the side wall of the charging device body 3. The plug frame 6 has a rectangular or U-shaped structure.

[0021] The charging device body 3 is provided with an electric plug 7 for connecting and charging the vehicle. The electric plug 7 is slidably installed in the plug frame 6 and can extend and retract along the length of the plug frame 6. The electric plug 7 is connected to the charging device body 3 through a cable 10, that is, the electric plug 7 is electrically connected to the charging module inside the charging device body 3 through the flexible cable 10. A fixing ring 11 is fixed on the electric plug 7. The fixing ring 11 slides on the plug frame 6 through the first electric push block 12 and the first sliding groove 13.

[0022] The first electric push block 12 uses a miniature linear motor or electric push rod to drive the electric plug 7 to extend or retract, thereby realizing automatic plugging and unplugging charging operation.

[0023] Under the control unit, which includes a main control module, a positioning module and a communication module, the mobile charging device receives user commands and controls the bottom support frame 1 to autonomously navigate to the target vehicle location. The user terminal initiates a charging request, the control unit plans the path and drives the device to the designated parking space, the user operates the charging gun to charge the vehicle, and the device automatically returns or stands by after charging is completed.

[0024] The bottom support frame 1 is equipped with a reversing mechanism that drives two driven wheels 9 to rotate in the same direction. The reversing mechanism includes a first meshing gear 27, which is coaxially fixed with the rotating shaft 25 and is located in the built-in cavity 19. A meshing rack 30 is also inserted through the built-in cavity 19 and meshes with the two first meshing gears 27.

[0025] The built-in cavity 19 is also equipped with a drive motor 28, and the output end of the drive motor 28 is coaxially fixed with a second meshing gear 29 that meshes with the meshing rack 30. When the bottom support frame 1 moves to the vehicle to be charged, it is only necessary to turn on the drive motor to drive the electric drive wheel 34 to rotate, so that the bottom support frame 1 can move together with the charging device body 3. When the device encounters a turn or changes direction during the movement, it is only necessary to turn on the drive motor 28.

[0026] The top of the charging device body 3 is provided with a limiting rod 4 that slides through the top plate 2. The limiting rod 4 extends upward through the top plate 2 and slides in cooperation with the top plate 2. The function of the limiting rod 4 is to ensure that the charging device body 3 remains vertical during the lifting process and to prevent tilting.

[0027] The bottom support frame 1 is provided with a roller assembly. The bottom support frame 1 has an internal cavity 19. The roller assembly also includes a roller frame 8. The electric drive wheel 34 and two driven wheels 9 are all mounted on the roller frame 8. The two driven wheels 9 rotate at the bottom of the bottom support frame 1 through the rotating shaft 25 and the roller frame 8. One end of the rotating shaft 25 extends into the internal cavity 19.

[0028] The roller assembly includes an electric drive wheel 34 and two driven wheels 9. The electric drive wheel 34 slides up and down in the inner cavity 19 via a lifting shaft 33 and a roller frame 8. An electric lifter 32 is installed in the inner cavity 19, and the output end of the electric lifter 32 is connected to the lifting shaft 33. A drive motor 28 is installed on the roller frame 8 to drive the electric drive wheel 34 to rotate. The drive motor 28 is a stepper motor that can drive the second meshing gear 29 to rotate forward and backward. The reversing mechanism also includes an electric push rod 31 installed on the bottom support frame 1. The output end of the electric push rod 31 is connected to and slidably connected to the meshing rack 30. Therefore, it can move laterally left and right with the meshing rack 30. Since the meshing rack 30 is synchronously meshed with the first meshing gear 27 on the two rotating shafts 25, the two driven wheels 9 on the two rotating shafts 25 rotate in the same direction. The reversing direction of the device can be controlled by the forward and reverse rotation of the second meshing gear 29. When steering is required, the electric actuator 31 pushes the meshing rack 30 into the meshing position, the drive motor 28 drives the second meshing gear 29 to rotate in both directions, thereby driving the meshing rack 30 to move left and right, driving the two first meshing gears 27 to rotate in the same direction, so that the two driven wheels 9 deflect in the same direction, thus achieving steering; The drive motor 28 is a stepper motor, which can precisely adjust the steering angle by controlling the number of pulses. By adjusting the rotation amplitude of the drive motor 28, the commutation angle of the device can be adjusted, and the device can eventually be moved to the corresponding charging position.

[0029] The bottom support frame 1 is also equipped with a locking mechanism that pulls two driven wheels 9 to rotate relative to each other. The locking mechanism is used to achieve quick positioning and braking after the device reaches the charging position. The locking mechanism includes a side groove 20. There are two side grooves 20, which are symmetrically opened on the inner wall of the built-in cavity 19. A side slider 21 slides in the side groove 20. The side slider 21 slides in the side groove 20 through a return spring 23. An electromagnetic generator 22 is provided in the side groove 20. The side slider 21 is made of iron.

[0030] The locking mechanism also includes a take-up reel 26, which is coaxially fixed to the rotating shaft 25. A winding rope 24 is wound around the outer wall of the take-up reel 26, and the other end of the winding rope 24 is connected to the side slider 21. When the device moves to the charging port position of the vehicle to be charged, the electric push rod 31 is activated, causing the electric push rod 31 to disengage the meshing gear 27 and the second meshing gear 29 along with the meshing rack 30. Then, the electromagnetic generator 22 in the side groove 20 is activated, causing the electromagnetic generator 22 to generate a magnetic field that attracts the side slider 21, thereby enabling the side slider 21 to move. The slider 21 moves toward the electromagnetic generator 22 and compresses the return spring 23. At the same time, the moving side slider 21 pulls the winding rope 24, and drives the two rotating shafts 25 to rotate in opposite directions through the take-up wheel 26. This causes the two driven wheels 9 below the rotating shafts 25 to rotate in opposite directions. In conjunction with the electric drive wheel 34, this ensures that the positioning operation is achieved through the bifurcation of the wheel. Compared with the traditional friction plate braking method, this method can achieve rapid positioning and movement by positioning through the bifurcation of the movement trajectory, and also avoids the problem of friction plate slippage and positioning failure in rainy weather.

[0031] like Figure 4 As shown, a lifting component is provided on the bottom support frame 1 to support the charging device body 3. The lifting component is used to lift the charging device body 3 upward before charging to adapt to the charging port of vehicles of different heights. The lifting component includes a second slide 14. Multiple second slides 14 are provided and are circumferentially opened on the top of the bottom support frame 1. A second electric push block 15 slides in the second slide 14. The second electric push block 15 is also driven by an electric push rod or a linear motor.

[0032] The lifting assembly also includes a base plate 17. The top of the base plate 17 is provided with a buckle 18 that engages with the charging device body 3. This buckle is used to engage and fix the base plate 17 with the bottom of the charging device body 3 to prevent relative sliding. A push rod 16 is rotatably connected between the base plate 17 and the second electric push block 15. Both ends of the push rod 16 are rotatably connected to the base plate 17 and the second electric push block 15 via hinges.

[0033] When multiple second electric push blocks 15 slide inwards simultaneously, the push rod 16 gradually rotates from an inclined state to a vertical direction, thereby lifting the base plate 17 upwards and driving the charging device body 3 to rise vertically. The sliding cooperation between the limit rod 4 and the top plate 2 ensures the stability of the rising process.

[0034] When charging is ready, multiple second electric push blocks 15 are activated, allowing the second electric push blocks 15 to slide in the second slide groove 14 and then push the support plate 17 to rise. Under the limiting action of the limit rod 4, the charging device body 3 is vertically raised and the charging height of the electric plug 7 is increased to adapt to different vehicles to be charged. Then turn on the electric lifter 32, so that the electric lifter 32 drives the lifting shaft 33 to descend. This can change the tilt angle of the bottom support frame 1, so that the electric plug 7 can be adjusted to align with the charging port of the vehicle to be charged. Finally, the first electric push block 12 is activated, which drives the electric plug 7 to slide and extend on the plug bracket 6 and insert into the charging port of the vehicle to be charged to complete the charging operation.

[0035] The specific steps of this invention are as follows: S1: First, the vehicle to be charged drives to the parking area. Then, under the action of the control unit, which includes a main control module, a positioning module and a communication module, the mobile charging device receives user instructions and controls the bottom support frame 1 to autonomously navigate to the target vehicle location. The user terminal initiates a charging request, the control unit plans the path and drives the device to the designated parking space, the user operates the charging gun to charge the vehicle, and the device automatically returns or stands by after charging is completed. S2: During the navigation of the bottom support frame 1 to the vehicle to be charged, it is only necessary to turn on the drive motor to drive the electric drive wheel 34 to rotate, so that the bottom support frame 1 and the charging device body 3 can move together. When the device encounters a turn or changes direction during the movement, it is only necessary to turn on the drive motor 28, which is a stepper motor that can drive the second meshing gear 29 to rotate forward and backward. Therefore, it can move laterally left and right with the meshing rack 30. Since the meshing rack 30 is synchronously meshed with the first meshing gear 27 on the two rotating shafts 25, the two driven wheels 9 on the two rotating shafts 25 can rotate in the same direction. The forward and reverse rotation of the second meshing gear 29 can control the reversing direction of the device. The rotation amplitude of the drive motor 28 can adjust the reversing angle of the device, and finally drive the device to the corresponding charging position.

[0036] S3: When the device moves to the charging port of the vehicle to be charged, the electric push rod 31 is activated, allowing the electric push rod 31 to disengage the first meshing gear 27 and the second meshing gear 29 along with the meshing rack 30. Then, the electromagnetic generator 22 in the side groove 20 is activated, allowing the electromagnetic generator 22 to generate a magnetic field that attracts the side slider 21. This allows the side slider 21 to move towards the electromagnetic generator 22 and compress the return spring 23. At the same time, the moving side slider 21 pulls the winding rope 24, which drives the two rotating shafts 25 to rotate in opposite directions through the take-up wheel 26. This causes the two driven wheels 9 below the rotating shafts 25 to rotate in opposite directions. This, in conjunction with the electric drive wheel 34, ensures that the positioning operation is achieved through wheel bifurcation. Compared with the traditional friction pad braking method, this method achieves rapid positioning and movement through the bifurcation of the movement trajectory, while also avoiding the problem of friction pad slippage and positioning failure in rainy weather. S4: When charging is ready, multiple second electric push blocks 15 are activated, allowing the second electric push blocks 15 to slide in the second slide groove 14 and then push the support plate 17 to rise. Under the limiting action of the limit rod 4, the charging device body 3 is vertically raised and the charging height of the plug 7 is increased to adapt to different vehicles to be charged. Then turn on the electric lifter 32, so that the electric lifter 32 drives the lifting shaft 33 to descend. This can change the tilt angle of the bottom support frame 1, so that the electric plug 7 can be adjusted to align with the charging port of the vehicle to be charged. Finally, the first electric push block 12 is activated, which drives the electric plug 7 to slide and extend on the plug bracket 6 and insert into the charging port of the vehicle to be charged to complete the charging operation.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mobile charging device for electric vehicles, comprising a bottom support frame (1) and a top plate frame (2), the bottom support frame (1) and the top plate frame (2) being connected by a support rod (5), and a charging device body (3) being disposed on the bottom support frame (1), characterized in that, The bottom support frame (1) is provided with a lifting component that supports the charging device body (3), and the charging device body (3) is provided with an electrical plug (7) that is connected to the vehicle for charging. The bottom support frame (1) is provided with a roller assembly, which includes an electric drive wheel (34) and two driven wheels (9). The bottom support frame (1) is provided with a reversing mechanism that drives the two driven wheels (9) to rotate in the same direction. The bottom support frame (1) is also provided with a locking mechanism that pulls the two driven wheels (9) to rotate relative to each other.

2. A mobile charging device for electric vehicles according to claim 1, characterized in that, A plug frame (6) is fixed on the side wall of the charging device body (3), and the plug (7) slides on the plug frame (6). The plug (7) is connected to the charging device body (3) through a cable (10). A fixing ring (11) is fixed on the plug (7). The fixing ring (11) slides on the plug frame (6) through the first electric push block (12) and the first sliding groove (13). The top of the charging device body (3) is provided with a limiting rod (4) that slides through the top plate frame (2).

3. A mobile charging device for electric vehicles according to claim 2, characterized in that, The lifting components include: The second slide (14) is provided in multiple ways and is circumferentially opened on the top of the bottom support frame (1). A second electric push block (15) slides in the second slide (14). The base plate (17) has a buckle (18) on its top that engages with the charging device body (3). A push rod (16) is rotatably connected between the base plate (17) and the second electric push block (15). Both ends of the push rod (16) are rotatably connected to the base plate (17) and the second electric push block (15) via hinges.

4. A mobile charging device for an electric vehicle according to claim 3, characterized in that, The bottom support frame (1) has an internal cavity (19), and the roller assembly also includes: The roller frame (8), the electric drive wheel (34) and the two driven wheels (9) are all mounted on the roller frame (8), and the two driven wheels (9) rotate at the bottom of the bottom support frame (1) via the rotating shaft (25) and the roller frame (8). One end of the rotating shaft (25) extends into the inner cavity (19).

5. A mobile charging device for an electric vehicle according to claim 4, characterized in that, The electric drive wheel (34) slides up and down in the inner cavity (19) via the lifting shaft (33) and the roller frame (8). An electric lifter (32) is provided in the inner cavity (19), and the output end of the electric lifter (32) is connected to the lifting shaft (33). A drive motor that drives the electric drive wheel (34) to rotate is provided on the roller frame (8).

6. A mobile charging device for an electric vehicle according to claim 5, characterized in that, The reversing mechanism includes: The first meshing gear (27) is fixed coaxially with the rotating shaft (25), and the first meshing gear (27) is located in the inner cavity (19). A meshing rack (30) is also inserted through the inner cavity (19), and the meshing rack (30) meshes with the two first meshing gears (27). The built-in cavity (19) is also equipped with a drive motor (28), and the output end of the drive motor (28) is coaxially fixed with a second meshing gear (29) that meshes with the meshing rack (30).

7. A mobile charging device for an electric vehicle according to claim 6, characterized in that, The reversing mechanism also includes an electric push rod (31) mounted on the bottom support frame (1), and the output end of the electric push rod (31) is connected to and slidably connected to the meshing rack (30).

8. A mobile charging device for an electric vehicle according to claim 7, characterized in that, Locking mechanisms include: Side groove (20), there are two side grooves (20) and they are symmetrically opened on the inner wall of the built-in cavity (19). A side slider (21) slides in the side groove (20). The side slider (21) slides in the side groove (20) through a return spring (23). An electromagnetic generator (22) is provided in the side groove (20). The side slider (21) is made of iron.

9. A mobile charging device for an electric vehicle according to claim 8, characterized in that, The locking mechanism also includes: The take-up reel (26) is fixed coaxially with the rotating shaft (25). A winding rope (24) is wound around the outer wall of the take-up reel (26). The other end of the winding rope (24) is connected to the side slider (21).

10. A method of using a mobile charging device for an electric vehicle, applied to the mobile charging device for an electric vehicle as described in claim 9, characterized in that, The specific steps are as follows: S1: First, the vehicle to be charged drives to the parking area. Then, under the control of the control unit, the mobile charging device autonomously navigates to the target vehicle location. The user terminal initiates a charging request, the control unit plans the route and drives the device to the designated parking space, the user operates the charging gun to charge the vehicle, and the device automatically returns or stands by after charging is completed. S2: During the process of the bottom support frame (1) being guided to the vehicle to be charged, it is only necessary to turn on the drive motor to drive the electric drive wheel (34) to rotate, and then turn on the drive motor (28) to make the two driven wheels (9) on the two rotating shafts (25) rotate in the same direction, which can drive the device to the corresponding charging position. S3: When the device moves to the charging port of the vehicle to be charged, turn on the electric push rod (31) and the electromagnetic generator (22), pull the winding rope (24), and drive the two rotating shafts (25) to rotate in opposite directions through the take-up wheel (26), thereby causing the two driven wheels (9) below the rotating shafts (25) to rotate in opposite directions, and cooperate with the electric drive wheel (34) to ensure that the positioning operation through wheel bifurcation can achieve rapid positioning and movement; S4: When charging is ready, multiple second electric push blocks (15) are activated, allowing the second electric push blocks (15) to slide in the second slide (14) and then push the undercarriage plate (17) to rise to accommodate different vehicles to be charged; Turn on the electric lifter (32) again and adjust the angle of the plug (7) to align with the charging port of the vehicle to be charged; Finally, the first electric push block (12) is activated, which drives the electric plug (7) to slide and extend on the plug holder (6) and insert into the charging port of the vehicle to be charged to realize the charging operation.

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