Dragging assistance type movable electric vehicle charging device

Abstract

The invention provides a dragging assistance type movable electric vehicle charging device which comprises a vehicle frame, and a battery pack is arranged on the inner side face of the vehicle frame; the steering axle assembly is arranged at one end of the bottom of the frame and used for adjusting the walking direction of the frame; the drive axle assembly is arranged at the other end of the bottom of the frame and used for driving the frame to move; the dragging resistance steering assembly and the dragging power-assisted steering assembly are arranged at one end of the frame. Compared with a fixed charging pile, the dragging power-assisted movable electric vehicle charging device provided by the invention can flexibly move, is not limited by a fixed site, and can be used in areas such as old communities, commercial parking lots and the like in which the fixed charging pile is difficult to add due to site conditions; the electric vehicle charging device can be conveniently moved to the position near a vehicle needing to be charged, and the charging requirement of an electric vehicle is met.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile charging equipment, and in particular to a drag-assisted movable electric vehicle charging device. Background Art

[0002] As the country accelerates the pace of developing clean energy-related industries, electric vehicles have entered thousands of households. Although various charging facilities are also being vigorously built, a large number of new energy vehicle owners still face inconveniences in charging due to constraints such as electricity prices and sites.

[0003] At present, the common way to charge electric vehicles mainly relies on fixed charging piles. However, in many old communities, due to the lack of sufficient space for the construction of charging facilities in the early planning, parking spaces are tight, and it is difficult to add fixed charging piles on a large scale, resulting in many car owners facing the dilemma of "no piles to charge". In some commercial parking lots, despite the large flow of people and high demand for vehicle parking, due to factors such as complex site layout and power capacity limitations, the number of fixed charging piles cannot meet the charging demand during peak hours. Car owners often need to queue for a long time waiting for charging, wasting a lot of time and energy.

[0004] Moreover, the electricity price of fixed charging piles is usually implemented according to the unified standards of the local power grid. During peak hours of electricity consumption, the electricity price is higher, which undoubtedly increases the charging cost of car owners. For users who operate vehicles and frequently use electric vehicles, the high charging costs have become a considerable expense.

[0005] Therefore, it is necessary to provide a drag-assisted mobile electric vehicle charging device to solve the above technical problems. Summary of the Invention

[0006] The present invention provides a drag-assisted movable electric vehicle charging device, which solves the problem that existing fixed charging piles are restricted by space and electricity prices, causing inconvenience and high cost for electric vehicle owners in charging.

[0007] In order to solve the above technical problems, the present invention provides a drag-assisted mobile electric vehicle charging device, comprising:

[0008] A vehicle frame, wherein a battery pack is provided on an inner side surface of the vehicle frame;

[0009] A steering axle assembly, the steering axle assembly being arranged at one end of the bottom of the frame and being used to adjust the traveling direction of the frame;

[0010] A drive axle assembly, the drive axle assembly being arranged at the other end of the bottom of the frame and being used to drive the frame to move;

[0011] The drag resistance steering assembly is arranged at one end of the vehicle frame, and is used to drive the steering axle assembly to steer and control the start and stop and travel speed of the drive axle assembly.

[0012] Preferably, a liquid cooling unit is provided at one end of the inner side surface of the frame, a charging and discharging module and a high-voltage box are provided at the other end of the inner side surface of the frame, and a system control component is provided on the top of the battery pack.

[0013] Preferably, shock absorbing components are provided on both sides of the two ends of the bottom of the frame.

[0014] Preferably, the steering axle assembly includes a connecting shaft, which is fixedly installed on the bottom of the shock absorber assembly, and a rotating frame is fixedly installed on both ends of the connecting shaft, the inner side surfaces of the two rotating frames are rotatably connected to the rotating parts, the side surfaces of the two rotating parts are rotatably connected to the steering wheels, and the bottoms of the two rotating parts are rotatably connected to the connecting rods, the bottom of one of the rotating parts is rotatably connected to the transmission rod, and the top of the transmission rod is rotatably connected to the connecting plate.

[0015] Preferably, the drag resistance steering assembly includes a fixed sleeve, which is fixedly installed on one end of the frame, the inner side of the fixed sleeve is rotatably connected to a rotating shaft, the top of the rotating shaft is rotatably connected to a drag rod, the top of the drag rod is fixedly installed with a handle, the top of the handle is fixedly installed with a control switch, and the bottom of the rotating shaft is fixedly installed on the top of the connecting piece.

[0016] Preferably, the drive axle assembly includes a driving member, both ends of which are fixedly mounted with mounting tubes, both mounting tubes are fixedly mounted on the bottom of the shock absorber assembly, one end of each of the two mounting tubes is provided with a walking wheel, and the two output ends of the driving member are respectively fixedly mounted to the two walking wheels.

[0017] Preferably, the system control component includes a CPU, a relay, a sensor and a contactor, and the relay, the sensor and the contactor are all electrically connected to the CPU, and the CPU is also electrically connected to the battery pack, the liquid cooling unit, the charging and discharging module, the high-voltage box and the driving component.

[0018] Preferably, a protective plate is provided on the top of the frame, sunshade mesh is fixedly installed on both sides of the bottom of the protective plate, and a winding shaft is wound around the inner side of the sunshade mesh.

[0019] Preferably, support rods are fixedly mounted around the bottom of the protective plate, and the bottoms of the support rods are fixedly mounted on the top of the vehicle frame.

[0020] Preferably, metal blocks are fixedly mounted on both ends of the reel, a magnetic plate is magnetically attracted to the top of the metal block, and the magnetic plate is fixedly mounted on the bottom of the protective plate.

[0021] Compared with related technologies, the drag-assisted mobile electric vehicle charging device provided by the present invention has the following beneficial effects:

[0022] The present invention provides a drag-assisted mobile electric vehicle charging device. Compared with fixed charging piles, the drag-assisted mobile electric vehicle charging device is flexible and not restricted by fixed sites. In areas such as old residential areas and commercial parking lots where it is difficult to add fixed charging piles due to site conditions, it can be easily moved to the vicinity of vehicles that need charging, thereby meeting the charging needs of electric vehicles.

[0023] The device has a flexible charging and discharging strategy. It uses a battery pack in conjunction with a charging and discharging module. During periods of low electricity prices, the device can be connected to the power grid for charging and storing electrical energy. When electricity prices are high, it can discharge and charge electric vehicles. This staggered charging and discharging method effectively reduces charging expenses and lowers overall charging costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a first embodiment of a tow-assisted portable electric vehicle charging device provided by the present invention;

[0025] Figure 2 for Figure 1 Another perspective structural diagram shown;

[0026] Figure 3 for Figure 2 Another perspective structural diagram shown;

[0027] Figure 4 for Figure 3 An enlarged schematic diagram of part A is shown;

[0028] Figure 5 for Figure 3 An enlarged schematic diagram of part B is shown;

[0029] Figure 6 This is a structural schematic diagram of a second embodiment of a tow-assisted portable electric vehicle charging device provided by the present invention;

[0030] Figure 7 A schematic structural diagram of a third embodiment of a tow-assisted portable electric vehicle charging device provided by the present invention;

[0031] Figure 8 for Figure 7 An enlarged schematic diagram of part C is shown.

[0032] Numbers in the figure: 1. Frame, 11. Battery pack, 12. Liquid cooling unit, 13. Charging and discharging module, 14. High-voltage box, 15. System control component, 2. Drag power steering component, 21. Fixed sleeve, 22. Rotating shaft, 23. Drag rod, 24. Handle, 25. Control switch, 3. Shock absorber component, 4. Steering axle assembly, 41. Connecting shaft, 42. Steering frame, 43. Steering member, 44. Steering wheel, 45. Connecting rod, 46. Transmission rod, 47. Connecting plate, 5. Drive axle assembly, 51. Drive member, 52. Mounting tube, 53. Travel wheel, 151. CPU, 152. Relay, 153. Sensor, 154. Contactor, 6. Protective plate, 61. Support rod, 62. Sunshade mesh, 63. Winding shaft, 64. Metal block, 65. Magnetic plate. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] First embodiment

[0035] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 ,in, Figure 1 A schematic structural diagram of a first embodiment of a tow-assisted portable electric vehicle charging device provided by the present invention; Figure 2 for Figure 1 Another perspective structural diagram shown; Figure 3 for Figure 2 Another perspective structural diagram shown; Figure 4 for Figure 3 An enlarged schematic diagram of part A is shown; Figure 5 for Figure 3 The enlarged schematic diagram of part B is shown. A drag-assisted portable electric vehicle charging device comprises: a frame 1, wherein a battery pack 11 is provided on the inner side surface of the frame 1;

[0036] A steering axle assembly 4 is provided at one end of the bottom of the vehicle frame 1 and is used to adjust the traveling direction of the vehicle frame 1;

[0037] A drive axle assembly 5, which is provided at the other end of the bottom of the frame 1 and is used to drive the frame 1 to move;

[0038] The drag resistance steering assembly 2 is provided at one end of the vehicle frame 1 and is used to drive the steering axle assembly 4 to steer and control the start, stop and travel speed of the drive axle assembly 5 .

[0039] A liquid cooling unit 12 is provided at one end of the inner side of the frame 1 , a charging and discharging module 13 and a high-voltage box 14 are provided at the other end of the inner side of the frame 1 , and a system control component 15 is provided on the top of the battery pack 11 .

[0040] Shock-absorbing components 3 are provided on both sides of the bottom of the frame 1 .

[0041] The steering axle assembly 4 includes a connecting shaft 41, which is fixedly installed at the bottom of the shock absorber assembly 3. A rotating frame 42 is fixedly installed at both ends of the connecting shaft 41. The inner sides of the two rotating frames 42 are rotatably connected to the rotating parts 43. The sides of the two rotating parts 43 are rotatably connected to the steering wheels 44. The bottoms of the two rotating parts 43 are rotatably connected to the connecting rods 45. The bottom of one of the rotating parts 43 is rotatably connected to the transmission rod 46, and the top of the transmission rod 46 is rotatably connected to the connecting piece 47.

[0042] The drag resistance steering assembly 2 includes a fixed sleeve 21, which is fixedly installed on one end of the frame 1. The inner side of the fixed sleeve 21 is rotatably connected to a rotating shaft 22, and the top of the rotating shaft 22 is rotatably connected to a drag rod 23. A handle 24 is fixedly installed on the top of the drag rod 23, and a control switch 25 is fixedly installed on the top of the handle 24. The bottom of the rotating shaft 22 is fixedly installed on the top of the connecting piece 47.

[0043] The drive axle assembly 5 includes a driving member 51, and mounting tubes 52 are fixedly installed at both ends of the driving member 51. The two mounting tubes 52 are fixedly installed at the bottom of the shock absorber assembly 3. One end of the two mounting tubes 52 is provided with a running wheel 53, and the two output ends of the driving member 51 are fixedly installed with the two running wheels 53 respectively.

[0044] Each tow-assisted portable electric vehicle charging device is equipped with a battery pack 11 with a capacity of no less than 78kWh, a high-voltage box 14, a charge and discharge module 13 with a charge and discharge power of no less than 60kW, and a liquid cooling unit to cool or keep the battery pack warm (the temperature of the coolant is adjusted by the operation of the compressor, and the coolant circulates inside the battery pack to heat or cool the battery pack).

[0045] By adopting the above technical solution, when new energy vehicle owners need to charge their vehicles:

[0046] The car owner controls the tow-assisted portable electric vehicle charging device by pushing or pulling it with electric power to the vicinity of the vehicle to be charged;

[0047] The car owner connects the charging gun on the device to the new energy vehicle to be charged;

[0048] The car owner scans the QR code on the device with a mobile phone to open the relevant mini program, and follows the prompts to set the charging parameters and start DC fast charging;

[0049] After charging is complete, the owner needs to follow the prompts on the mobile app to complete the payment;

[0050] When the power of the built-in battery pack 11 of the towable power-assisted mobile electric vehicle charging device is exhausted, the parking lot manager is responsible for driving the device to a designated location in the parking lot for recharging.

[0051] There are 6 radar sensors arranged around the body of this device. When the device approaches obstacles such as pedestrians and vehicles while moving, the device will emit a buzzing warning sound and automatically slow down until it stops.

[0052] This device has multiple groups of temperature sensors arranged in the battery pack 11 to perform comprehensive temperature monitoring of the battery pack 11. When the battery cell temperature is lower than 10 degrees, the charging and discharging power will be reduced, and the heating module inside the battery pack will be started to heat the battery cell by heating the ethylene glycol medium; when it is detected that the operating temperature of the battery pack 11 is higher than 50°C, the charging and discharging power will be automatically reduced, and the compressor inside the battery pack will start cooling to reduce the temperature; the thermal management module of this device can enable the battery pack to operate within a certain temperature range and perform charging and discharging at the optimal power.

[0053] This equipment is equipped with a perfluoroacetone automatic fire extinguishing device installed just above the battery pack. When it detects that the battery pack temperature is too high and there is a flame, the fire extinguishing device is activated, which can quickly absorb heat and cool down to complete the fire extinguishing work.

[0054] The working principle of the drag-assisted mobile electric vehicle charging device provided by the present invention is as follows:

[0055] When the charging device needs to be moved, the operator grasps the handle 24 at the top of the drag rod 23 and activates the drive member 51 in the drive axle assembly 5 via the control switch 25. The drive member 51 rotates, driving the travel wheel 53 fixed to its output end, thereby driving the vehicle frame 1 to move. During movement, to change the travel direction, the operator rotates the drag rod 23, which drives the rotating shaft 22 to rotate within the fixed sleeve 21. The connecting piece 47 fixed to the bottom of the rotating shaft 22 rotates accordingly. The rotation of the connecting piece 47 drives the transmission rod 46 to move. The transmission rod 46 pulls or pushes one of the rotating members 43, causing it to rotate about the connecting shaft 41. The rotation of the rotating member 43 drives the steering wheel 44 to turn. Simultaneously, the connecting rod 45 at the bottom of the rotating member 43 also moves accordingly, driving the other rotating member 43 and the steering wheel 44 to turn synchronously, thereby adjusting the travel direction of the vehicle frame 1. During charging, the battery pack 11 on the inner side of the vehicle frame 1 is connected to the electric vehicle to be charged via the charge and discharge module 13, providing it with electrical energy. The liquid cooling unit 12 dissipates heat from the battery pack 11 to ensure that the battery pack 11 operates in a suitable temperature environment and maintains its performance and safety.

[0056] Compared with related technologies, the drag-assisted mobile electric vehicle charging device provided by the present invention has the following beneficial effects:

[0057] Compared with fixed charging piles, this drag-assisted mobile electric vehicle charging device can be flexibly moved and is not restricted by fixed sites. In areas such as old residential areas and commercial parking lots where it is difficult to add fixed charging piles due to site conditions, it can be easily moved to the vicinity of the vehicles that need charging to meet the charging needs of electric vehicles.

[0058] The device has a flexible charging and discharging strategy. By using the battery pack 11 in conjunction with the charging and discharging module 13, the device can be connected to the power grid for charging and storing electrical energy during periods of low electricity prices. When electricity prices are high, it can discharge and charge electric vehicles. This staggered charging and discharging method effectively reduces charging expenses and lowers the overall charging cost.

[0059] Second embodiment

[0060] Please refer to Figure 6 Based on the first embodiment of this application, which provides a drag-assisted portable electric vehicle charging device, the second embodiment of this application provides another drag-assisted portable electric vehicle charging device. The second embodiment is merely a preferred embodiment of the first embodiment, and implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0061] Specifically, the second embodiment of the present application provides a tow-assisted portable electric vehicle charging device. The difference is that, in a tow-assisted portable electric vehicle charging device, the system control component 15 includes a CPU 151, a relay 152, a sensor 153 and a contactor 154, and the relay 152, the sensor 153 and the contactor 154 are all electrically connected to the CPU, and the CPU 151 is also electrically connected to the battery pack 11, the liquid cooling unit 12, the charging and discharging module 13, the high-voltage box 14 and the driving component 51.

[0062] The working principle of the drag-assisted mobile electric vehicle charging device provided by the present invention is as follows:

[0063] When the operator grips the handle 24 at the top of the drag rod 23 and activates the drive member 51 in the drive axle assembly 5 via the control switch 25, the sensor 153 monitors the operating status of the drive member 51 in real time, such as parameters such as speed and current, and feeds this information back to the CPU 151. Based on a preset program and data fed back by the sensor 153, the CPU 151 controls the operation of the drive member 51 via the contactor 154, ensuring stable power output, driving the running wheels 53 to rotate, and driving the frame 1 to move smoothly.

[0064] During the charging process, when the battery pack 11 on the inner side of the frame 1 is connected to the electric vehicle to be charged through the charge and discharge module 13, the sensor 153 will monitor the battery pack 11's charge level, voltage, current, and the battery status of the vehicle to be charged, and transmit this data to the CPU 151. Based on this information, the CPU 151 precisely controls the operation of the charge and discharge module 13 through the relay 152 and contactor 154, adjusting the charging voltage and current to achieve safe and efficient charging of the electric vehicle. For example, if it detects that the battery level of the vehicle to be charged is low, the CPU 151 will control the charge and discharge module 13 to quickly charge with a higher current; when the battery level is close to full, the charging current will be gradually reduced to avoid damage to the battery caused by overcharging.

[0065] At the same time, the cooling process of the battery pack 11 by the liquid cooling unit 12 is also controlled by the system control unit 15. Sensor 153 monitors the temperature of the battery pack 11. If the temperature is too high, the CPU 151 controls the liquid cooling unit 12 to start or increase the cooling power. The coolant circulates within the battery pack 11, removing heat and ensuring that the battery pack 11 operates at an appropriate temperature. If the temperature is too low, the CPU 151 can also control the liquid cooling unit 12 to perform appropriate heating operations to maintain the performance and safety of the battery pack 11.

[0066] Compared with related technologies, the drag-assisted mobile electric vehicle charging device provided by the present invention has the following beneficial effects:

[0067] Through the coordinated work of CPU151, relay 152, sensor 153 and contactor 154, the working status of various components such as the drive part 51, battery pack 11, liquid cooling unit 12 and charging and discharging module 13 can be monitored and adjusted in real time. During the charging process, the charging parameters can be intelligently adjusted according to the actual status of the battery pack 11 and the battery of the vehicle to be charged, thereby improving charging efficiency, reducing charging time, and providing users with a more convenient charging experience.

[0068] Third embodiment

[0069] Please refer to Figure 7 and Figure 8 Based on the first embodiment of this application, which provides a drag-assisted portable electric vehicle charging device, the third embodiment of this application provides another drag-assisted portable electric vehicle charging device. The third embodiment is merely a preferred embodiment of the first embodiment, and implementation of the third embodiment will not affect the independent implementation of the first embodiment.

[0070] Specifically, the third embodiment of the present application provides a tow-assisted portable electric vehicle charging device that is different in that a tow-assisted portable electric vehicle charging device is provided with a protective plate 6 on the top of the frame 1, and sunshade mesh 62 is fixedly installed on both sides of the bottom of the protective plate 6, and a winding shaft 63 is wrapped around the inner side of the sunshade mesh 62.

[0071] Support rods 61 are fixedly installed around the bottom of the protective plate 6 , and the bottom of the support rods 61 is fixedly installed on the top of the frame 1 .

[0072] Metal blocks 64 are fixedly mounted on both ends of the reel 63 . A magnetic plate 65 is magnetically attracted to the top of the metal block 64 . The magnetic plate 65 is fixedly mounted on the bottom of the protective plate 6 .

[0073] The working principle of the drag-assisted mobile electric vehicle charging device provided by the present invention is as follows:

[0074] When charging outdoors, the staff can first separate the metal block 64 and the magnetic plate 65, and then move the reel 63 downward to release the sunshade mesh 62 rolled up on the outer side of the reel 63. The sunshade mesh 62 is placed on both sides of the frame 1 through the gravity of the reel 63 and the metal block 64 to shade the battery pack 11 and prevent it from being exposed to the sun for a long time. When charging is completed or shading is no longer needed, the sunshade mesh 62 can be rewound onto the reel 63. The reel 63 is fixed to the bottom of the protective plate 6 through the magnetic attraction between the metal blocks 64 at both ends of the reel 63 and the magnetic plate 65 at the bottom of the protective plate 6 for easy storage.

[0075] Compared with related technologies, the drag-assisted mobile electric vehicle charging device provided by the present invention has the following beneficial effects:

[0076] By setting up the protective plate 6 and the sunshade mesh 62, when in use, the protective plate 6 can provide certain protection for the top of the device, reducing the risk of direct impact and damage to the internal components of the device by external objects. The sunshade mesh 62 can effectively block the sunlight in outdoor charging scenarios to prevent the battery pack 11 from being exposed to the sun for a long time. Because the battery pack works in a high temperature environment, its performance and service life will be affected. The shading effect of the sunshade mesh 62 can reduce the temperature of the battery pack, maintain its stable working state, and extend the service life of the battery pack 11, thereby ensuring the stable operation of the entire charging device and improving the practicality and reliability of the charging device.

[0077] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A drag-assisted mobile electric vehicle charging device, characterized in that: include: A vehicle frame, wherein a battery pack is provided on an inner side surface of the vehicle frame; A steering axle assembly, the steering axle assembly being arranged at one end of the bottom of the frame and being used to adjust the traveling direction of the frame; A drive axle assembly, the drive axle assembly being arranged at the other end of the bottom of the frame and being used to drive the frame to move; The drag resistance steering assembly is arranged at one end of the vehicle frame, and is used to drive the steering axle assembly to steer and control the start and stop and travel speed of the drive axle assembly.

2. A drag-assisted mobile electric vehicle charging device according to claim 1, characterized in that: A liquid cooling unit is provided at one end of the inner side of the frame, a charging and discharging module and a high-voltage box are provided at the other end of the inner side of the frame, and a system control component is provided on the top of the battery pack.

3. The drag-assisted mobile electric vehicle charging device according to claim 1, characterized in that: Shock-absorbing components are provided on both sides of the two ends of the bottom of the frame.

4. A drag-assisted mobile electric vehicle charging device according to claim 2, characterized in that: The steering axle assembly includes a connecting shaft, which is fixedly installed at the bottom of the shock absorber assembly. A rotating frame is fixedly installed at both ends of the connecting shaft. The inner sides of the two rotating frames are rotatably connected to rotating parts. The sides of the two rotating parts are rotatably connected to steering wheels. The bottoms of the two rotating parts are rotatably connected to connecting rods, the bottom of one of the rotating parts is rotatably connected to a transmission rod, and the top of the transmission rod is rotatably connected to a connecting piece.

5. The drag-assisted mobile electric vehicle charging device according to claim 4, characterized in that: The drag resistance steering assembly includes a fixed sleeve, which is fixedly installed on one end of the frame. The inner side of the fixed sleeve is rotatably connected to a rotating shaft, the top of the rotating shaft is rotatably connected to a drag rod, the top of the drag rod is fixedly installed with a handle, the top of the handle is fixedly installed with a control switch, and the bottom of the rotating shaft is fixedly installed on the top of the connecting piece.

6. The drag-assisted mobile electric vehicle charging device according to claim 5, characterized in that: The drive axle assembly includes a driving member, both ends of which are fixedly installed with mounting tubes, the two mounting tubes are fixedly installed at the bottom of the shock absorber assembly, one end of the two mounting tubes is provided with a running wheel, and the two output ends of the driving member are respectively fixedly installed with the two running wheels.

7. The drag-assisted mobile electric vehicle charging device according to claim 6, characterized in that: The system control component includes a CPU, a relay, a sensor and a contactor. The relay, the sensor and the contactor are all electrically connected to the CPU. The CPU is also electrically connected to the battery pack, the liquid cooling unit, the charging and discharging module, the high-voltage box and the driving component.

8. The drag-assisted mobile electric vehicle charging device according to claim 1, characterized in that: A protective plate is provided on the top of the vehicle frame, sunshade mesh is fixedly installed on both sides of the bottom of the protective plate, and a reel is wound around the inner side of the sunshade mesh.

9. The drag-assisted mobile electric vehicle charging device according to claim 8, characterized in that: Support rods are fixedly installed around the bottom of the protective plate, and the bottoms of the support rods are fixedly installed on the top of the frame.

10. The drag-assisted mobile electric vehicle charging device according to claim 8, characterized in that: Metal blocks are fixedly installed at both ends of the reel, a magnetic plate is magnetically attracted to the top of the metal block, and the magnetic plate is fixedly installed on the bottom of the protective plate.

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