A V2G charging pile, a portable fast charger and a charging system

Abstract

The present invention relates to the technical field of electric vehicle charging, and in particular provides a V2G charging pile, a portable fast charger and a charging system. The portable fast charger includes a portable charger, two charging connector assemblies and two quick connection assemblies. The present invention can provide multiple points of real-time and accurate current or voltage data, prevent the system from misjudging as overcurrent or overvoltage due to sudden instantaneous voltage or current fluctuations at a certain point, effectively prevent the misjudgment of overcurrent or overvoltage due to instantaneous voltage or current mutations caused by voltage spikes, current mutations and the like in the power grid, and at the same time, ensure the stability and stability of the charging / discharging plug-in process, reduce deviations or shaking during plug-in, avoid damage or safety risks caused by poor plug-in, and prevent loose or disconnected connections caused by external factors such as vibration and pulling, thereby ensuring the continuity and safety of the charging / discharging process.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging, and in particular to a V2G charging pile, a portable fast charger and a charging system. Background Art

[0002] V2G charging piles are charging piles that allow electric vehicles to conduct two-way energy transmission between the electric vehicle and the power grid. They can absorb energy from the power grid to charge the electric vehicle during the off-peak period, and feed the electric energy of the electric vehicle energy storage unit back to the power grid during the peak period, thus playing the role of peak-shaving and valley-filling for the power grid. When voltage spikes, current mutations, etc. occur in the power grid, resulting in instantaneous voltage or current mutations, the existing V2G charging piles are prone to misjudging overcurrent or overvoltage conditions and triggering overcurrent and overvoltage protection, causing frequent power outages or overloads of the equipment, damaging the electronic components or circuits of the equipment, and shortening the service life of the equipment.

[0003] The fast charger is an effective tool for on-board emergency charging and fast charging, an effective supplement to the charging pile, and can convert the slow charging voltage of 220 volts at home into a fast charging voltage of 380 volts, accelerating the charging speed. It is an ideal charging auxiliary tool for private electric vehicles. At present, fast charging energy storage machines generally have the problem of being bulky and inconvenient to move. The existing portable fast chargers use a hard connection between the fast charging energy storage machine and the connector, which leads to stress concentration at the connection part during movement, which easily leads to loose connection and unreliable operation. Summary of the invention

[0004] Based on this, it is necessary to provide a V2G charging pile, a portable fast charger and a charging system to solve at least one technical problem in the background technology.

[0005] A V2G charging pile comprises an electric pile shell, a filter, a differential protection module, a bidirectional current conversion module and a main control module. The electric pile shell is installed in an installation ground, and an installation cavity is formed in a hollow space inside the electric pile shell. An inlet hole is recessed on the bottom surface of the installation cavity, and the inlet hole is connected to a cable of a power grid. The filter is installed at the bottom of the installation cavity, and the filter is electrically connected to the power grid. The filter is used to filter out high-frequency noise and harmonics in the power grid circuit. The differential protection module, the bidirectional current conversion module and the main control module are all installed on the top of the installation cavity. The differential protection module is electrically connected to the filter and is used to detect the current and voltage difference in the circuit. The bidirectional current conversion module is electrically connected to the differential protection module. The differential protection module is used to cut off the circuit or adjust the voltage when overcurrent or overvoltage is detected to protect the equipment from damage. The bidirectional current conversion module is used to rectify the alternating current of the power grid into direct current and filter it during charging to provide electric energy to users, and convert the direct current power at the user into alternating current to transmit electric energy to the power grid during discharging. The main control module is used to manage the communication interaction with the user and the power grid during the charging and discharging process.

[0006] As a further improvement of the present invention, the differential protection module includes a current transformer, a voltage transformer, a comparator, a threshold setter and a trigger. The current transformer is used to measure the changes in current of different phases in the circuit and transmit the current signal to the comparator in real time. The voltage transformer is used to monitor the changes in voltage of different phases in the circuit and transmit the voltage to the comparator in real time. The comparator is used to compare the current and voltage signals of different phases in the circuit and calculate the current or voltage difference in the circuit to generate a differential value. The threshold setter is used to set the trigger threshold of the differential protection and determine whether the differential value exceeds the set value based on the set threshold. The trigger is used to receive the threshold setter signal to trigger whether to cut off the circuit.

[0007] As a further improvement of the present invention, the bidirectional conversion module includes a rectifier, an inverter and a conversion controller. The rectifier includes a three-phase transformer and six thyristors. The six thyristors are connected to form a three-phase bridge rectifier circuit. The three phases of the three-phase transformer are respectively connected to the three phases of the three-phase bridge rectifier circuit. The neutral point of the three-phase transformer is grounded for converting alternating current into direct current. The inverter converts the direct current input by the user into alternating current. The conversion controller is used to monitor and control the operation of the rectifier and the inverter.

[0008] A portable fast charger comprises a portable charger, two charging connector assemblies and two quick connection assemblies. An input hole is recessed at a top corner of the outer side of the portable charger, an electric gun connector is arranged on the input hole, two charging installation holes are recessed at the top of the outer side of the portable charger, the two charging connector assemblies are respectively installed in the two charging installation holes, and the two quick connection assemblies are respectively clamped and installed on the outer sides of the two charging connector assemblies.

[0009] As a further improvement of the present invention, each charging connector assembly includes a connector shell, an electric plug and a charging card-mounting element. The connector shell includes a fixed mounting portion and a card-mounting portion. The outer wall of the fixed mounting portion is installed in the inner wall of the charging mounting hole. The middle part of the inner side of the fixed mounting portion is recessed with a plug mounting hole. The inner side of the card-mounting portion is installed on the outer side of the fixed mounting portion. The inner wall of the card-mounting portion is hollow to form a hollow cavity. The hollow cavity is connected to the plug mounting hole. The outer side of the hollow cavity is recessed with a card-mounting groove. The middle part of the inner wall of the hollow cavity is recessed with a sliding annular groove. The inner side of the electric plug is fixedly installed in the plug mounting hole. A plurality of connecting wires are arranged on the inner side of the electric plug. A limiting clamp is convexly provided in the middle part of the outer wall of the electric plug. The outer wall of the limiting clamp is fixedly connected to the inner side of the inner wall of the hollow cavity. A conical groove is recessed in the middle part of the outer side of the limiting clamp, and a supporting annular groove is recessed on the outer side of the limiting clamp. A plurality of electrode needles are convexly provided in the middle part of the outer side of the electric plug. A threaded cylinder is convexly provided on the outer edge of the outer side of the electric plug. The charging card-mounting element is installed in the hollow cavity and the card-mounting groove.

[0010] As a further improvement of the present invention, the charging card element includes a card sliding cylinder, an elastic deformation ring and a rubber ring. A sliding ring is convexly provided on the inner side of the outer wall of the card sliding cylinder. The sliding ring is slidably installed in the sliding annular groove. A docking annular groove is concavely provided on the inner side of the sliding ring. A carding annular groove is concavely provided on the inner side of the sliding ring. The center of the inner side of the sliding ring is concavely provided with a carding annular groove. The inner side of the elastic deformation ring is arranged in the supporting annular groove, the outer side of the elastic deformation ring is arranged in the docking annular groove, and the inner wall of the elastic deformation ring is attached to the outer side of the outer wall of the electric plug, the inner wall of the rubber ring is attached to the middle part of the outer wall of the elastic deformation ring, and the rubber ring is located between the limiting card ring and the sliding ring.

[0011] As a further improvement of the present invention, each quick connection assembly includes a quick connection shell, a connecting socket and a connecting clamping element. The quick connection shell includes a shell part and a rotating connection cylinder. A connecting cavity is recessed in the middle of the inner side of the shell part, and a cable connection hole is recessed in the middle of the inner side of the connecting cavity. The outer side of the rotating connection cylinder is rotatably installed on the inner outer edge of the shell part. A threaded groove is recessed in the inner wall of the rotating connection cylinder. A connecting installation shell is provided on the outer side of the outer wall of the connecting socket. The outer wall of the connecting installation shell is installed in the middle of the inner wall of the connecting cavity, and the connecting socket is located in the middle cavity of the rotating connection cylinder. A plurality of power plug-in holes are recessed on the inner side of the connecting socket, and the plurality of power plug-in holes are respectively arranged opposite to the plurality of electrode needles. The connecting clamping element is installed in the rotating connection cylinder.

[0012] As a further improvement of the present invention, a trigger sliding groove is recessed on the inner outer edge of the rotating connecting cylinder, a linkage sliding groove is recessed in the middle of the trigger sliding groove, a connecting sliding groove is recessed on the inner wall of the linkage sliding groove, the connecting sliding groove is connected to the internal cavity of the rotating connecting cylinder, and an inclined preset groove is recessed on the outer side of the inner wall of the connecting sliding groove.

[0013] As a further improvement of the present invention, the connecting clamping element includes a trigger slide, a trigger pressure plate and an arc-shaped clamping plate. The trigger slide is slidably installed on the inner side of the connecting slide groove. A first spring is arranged between the outer side of the trigger slide and the side plate of the connecting slide groove. The middle part of the trigger pressure plate is rotatably installed in the trigger slide through a torsion spring. An arc-shaped surface is concavely provided at the outer end of the trigger pressure plate. The arc-shaped clamping plate is slidably installed in the trigger sliding groove. A trigger linkage plate is convexly provided on the middle part of the inner wall of the arc-shaped clamping plate. The trigger linkage plate is abutted against the arc-shaped surface, and a second spring is arranged between the inner side of the trigger linkage plate and the outer side of the linkage slide groove.

[0014] A charging system for a portable fast charger includes a battery and a boost rectifier module. The battery is used for emergency charging and discharging. The boost rectifier module is used to convert different charging voltages into a fast charging voltage of 380V. The electric gun connector is electrically connected to the battery and the boost rectifier module. Two charging connector assemblies are electrically connected to the battery and the boost rectifier module.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention can compare the current or voltage data at different positions or phases in the circuit, identify the situation in the circuit, and provide real-time and accurate current or voltage data at multiple points, thereby preventing the system from misjudging an overcurrent or overvoltage situation caused by a sudden instantaneous voltage or current fluctuation at a certain point, and effectively preventing the misjudgment of an overcurrent or overvoltage situation caused by a sudden voltage or current fluctuation in the power grid. Through monitoring, judgment and control, the protection system can effectively monitor and protect against abnormal situations such as overcurrent and overvoltage, thereby ensuring the safety of equipment and users.

[0017] 2. The present invention can ensure the smoothness and stability during the charging / discharging connection process, reduce deviation or shaking during connection, protect the charging equipment and battery, avoid damage or safety risks caused by poor connection, and can realize the automatic locking of the quick connection component and the charging connector component to each other to prevent the connection from loosening or disconnecting due to external factors such as vibration and pulling, thereby ensuring the continuity and safety of the charging / discharging process. At the same time, it can provide a buffer for the connection process and absorb the vibration that may be generated during the charging process, reduce mechanical stress concentration and wear, and extend the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a V2G charging pile in one embodiment of the present invention.

[0019] Figure 2 FIG. 4 is a three-dimensional schematic diagram of a portable fast charger according to an embodiment of the present invention.

[0020] Figure 3 FIG. 4 is a three-dimensional schematic diagram of a charging connector assembly according to an embodiment of the present invention.

[0021] Figure 4 FIG. 1 is a schematic diagram of the interior of a charging connector assembly according to an embodiment of the present invention.

[0022] Figure 5 It is a three-dimensional schematic diagram of a quick connection assembly in one embodiment of the present invention.

[0023] Figure 6 4 is a cross-sectional view of a quick connection assembly according to an embodiment of the present invention.

[0024] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0025] In the figure:

[0026] 10. Charging pile shell; 20. Filter; 30. Differential protection module; 40. Bidirectional converter module; 50. Main control module; 11. Installation cavity; 12. Power inlet hole; 18. Charging cable installation hole; 19. Charging gun placement slot; 60. Portable charger; 61. Input hole; 62. Electric gun connector; 63. Charging installation hole; 70. Charging connector assembly; 71. Connector shell; 711. Fixed installation part; 712. Card installation part; 713. Plug installation hole; 714. Hollow cavity; 715. Card slot; 716. Sliding annular groove; 72. Electric plug; 721. Connecting wire; 722. Limiting clamp ring; 723. Conical groove; 724. Retaining annular groove; 725. Electrode needle; 726. Threaded barrel; 73. Charging card element; 731. card-set sliding cylinder; 732. elastic deformation ring; 733. rubber ring; 734. sliding ring; 735. docking annular groove; 736. card-set annular groove; 80. quick connection assembly; 81. quick connection shell; 811. shell part; 812. rotating connecting cylinder; 813. connecting cavity; 814. cable connecting hole; 815. threaded groove; 816. trigger sliding groove; 817. linkage sliding groove; 818. connecting sliding groove; 819. inclined preset groove; 82. connecting socket; 821. connecting mounting shell; 822. plug-in hole; 83. connecting card-set element; 831. trigger slide; 832. trigger pressure plate; 833. arc-shaped card-set plate; 834. trigger linkage plate; 835. first spring; 836. arc-shaped surface; 837. second spring. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0028] In the description of the present invention, it should be noted that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] See also Figure 1 A V2G charging pile includes a charging pile shell 10, a filter 20, a differential protection module 30, a bidirectional conversion module 40 and a main control module 50. The charging pile shell 10 is installed in the installation ground. The charging pile shell 10 is hollow inside to form an installation cavity 11. The bottom surface of the installation cavity 11 is concavely provided with an inlet hole 12. The inlet hole 12 is connected to the cable of the power grid. The filter 20 is installed at the bottom of the installation cavity 11, and the filter 20 is electrically connected to the power grid. The filter 20 is used to filter out high-frequency noise and harmonics in the power grid circuit. The differential protection module 30, the bidirectional conversion module 40 and the main control module 50 are on the top. The dynamic protection module 30 is electrically connected to the filter 20 and is used to detect the current and voltage differences in the circuit. The bidirectional conversion module 40 is electrically connected to the differential protection module 30. The differential protection module 30 is used to cut off the circuit or adjust the voltage when overcurrent or overvoltage is detected to protect the equipment from damage. The bidirectional conversion module 40 is used to rectify the AC power of the power grid into DC power and filter it to provide electric energy to the user during charging, and convert the DC power at the user into AC power to transmit electric energy to the power grid during discharging. The main control module 50 is used to manage the communication interaction with the user and the power grid during the charging and discharging process.

[0031] The differential protection module 30 includes a current transformer, a voltage transformer, a comparator, a threshold setter and a trigger. The current transformer is used to measure the change of current in different phases in the circuit and transmit the current signal to the comparator in real time. The voltage transformer is used to monitor the change of voltage in different phases in the circuit and transmit the voltage to the comparator in real time. The comparator is used to compare the current and voltage signals of different phases in the circuit and calculate the current or voltage difference in the circuit to generate a differential value. The threshold setter is used to set the trigger threshold of the differential protection and determine whether the differential value exceeds the set value based on the set threshold. The trigger is used to receive the threshold setter signal to trigger whether to cut off the circuit.

[0032] By comparing the current or voltage data at different positions or phases in the circuit, the situation in the circuit can be identified, and real-time and accurate current or voltage data at multiple points can be provided to prevent the system from misjudging overcurrent or overvoltage caused by sudden instantaneous voltage or current fluctuations at a certain point. It can effectively prevent instantaneous voltage or current mutations caused by voltage spikes, current mutations, etc. in the power grid from being misjudged as overcurrent or overvoltage. Through monitoring, judgment and control, the protection system can effectively monitor and protect against abnormal situations such as overcurrent and overvoltage to ensure the safety of equipment and users.

[0033] The bidirectional conversion module 40 includes a rectifier, an inverter and a conversion controller. The rectifier includes a three-phase transformer and six thyristors. The six thyristors are connected to form a three-phase bridge rectifier circuit. The three phases of the three-phase transformer are respectively connected to the three phases of the three-phase bridge rectifier circuit. The neutral point of the three-phase transformer is grounded and is used to convert AC power into DC power. The inverter converts the DC power input by the user into AC power. The conversion controller is used to monitor and control the operation of the rectifier and the inverter.

[0034] During discharge, the output AC power is converted into DC power by alternating on and off of the six diodes or thyristors in the rectifier, so as to accurately ensure the stability of the required DC voltage, realize voltage conversion, and conversion of AC power to DC power, and provide a stable DC power supply to continuously meet the working needs of electrical equipment. Inverters are used to convert DC power input by users such as electric vehicles and portable fast chargers into AC power when returning power, so as to release the user's stored electric energy and transmit it back to the power grid. The converter controller monitors and controls the flow direction, frequency, voltage and other parameters of energy to ensure the stability and safety of energy transmission. The filter 20 is used to filter out noise and harmonics in the circuit to ensure the quality and stability of power transmission.

[0035] See also Figures 2 to 7The present invention also provides a portable fast charger, including a portable charger 60, two charging connector assemblies 70 and two quick connection assemblies 80. An input hole 61 is recessed at the top corner of the outer side of the portable charger 60, and an electric gun connector 62 is provided on the input hole 61. Two charging installation holes 63 are recessed at the top of the outer side of the portable charger 60, and the two charging connector assemblies 70 are respectively installed in the two charging installation holes 63. The two quick connection assemblies 80 are respectively clamped and installed on the outer sides of the two charging connector assemblies 70.

[0036] Each charging connector assembly 70 includes a connector housing 71, an electric plug 72 and a charging clamping element 73. The connector housing 71 includes a fixed mounting portion 711 and a clamping mounting portion 712. The outer wall of the fixed mounting portion 711 is mounted on the inner wall of the charging mounting hole 63. A plug mounting hole 713 is recessed in the middle of the inner side of the fixed mounting portion 711. The inner side of the clamping mounting portion 712 is mounted on the outer side of the fixed mounting portion 711. A hollow cavity 714 is formed in the inner wall of the clamping mounting portion 712. The hollow cavity 714 is connected to the plug mounting hole 713. A clamping groove 715 is recessed on the outer side of the hollow cavity 714. A sliding annular groove 716 is provided, and the inner side of the electric plug 72 is fixedly installed in the plug installation hole 713. A plurality of connecting wires 721 are arranged on the inner side of the electric plug 72. A limiting snap ring 722 is convexly provided in the middle part of the outer wall of the electric plug 72. The outer wall of the limiting snap ring 722 is fixedly connected to the inner side of the inner wall of the hollow cavity 714. A conical groove 723 is concavely provided in the middle part of the outer side of the limiting snap ring 722. A supporting annular groove 724 is concavely provided on the outer side of the limiting snap ring 722. A plurality of electrode needles 725 are convexly provided in the middle part of the outer side of the electric plug 72. A threaded cylinder 726 is convexly provided on the outer edge of the outer side of the electric plug 72. The charging card element 73 is installed in the hollow cavity 714 and the card groove 715.

[0037] The charging clamping element 73 includes a clamping sliding cylinder 731, an elastic deformation ring 732 and a rubber ring 733. A sliding ring 734 is convexly provided on the inner side of the outer wall of the clamping sliding cylinder 731. The sliding ring 734 is slidably installed in the sliding annular groove 716. A docking annular groove 735 is concavely provided on the inner side of the sliding ring 734. A clamping annular groove 736 is concavely provided in the center of the inner side of the sliding ring 734. The inner side of the elastic deformation ring 732 is arranged in the supporting annular groove 724. The outer side of the elastic deformation ring 732 is arranged in the docking annular groove 735. The inner wall of the elastic deformation ring 732 is attached to the outer side of the outer wall of the electric plug 72. The inner wall of the rubber ring 733 is attached to the middle part of the outer wall of the elastic deformation ring 732. The rubber ring 733 is located between the limiting clamping ring 722 and the sliding ring 734.

[0038] Each quick connection assembly 80 includes a quick connection shell 81, a connection socket 82 and a connection clamping element 83. The quick connection shell 81 includes a shell portion 811 and a rotating connection cylinder 812. A connection cavity 813 is recessed in the middle of the inner side of the shell portion 811, and a cable connection hole 814 is recessed in the middle of the inner side of the connection cavity 813. The outer side of the rotating connection cylinder 812 is rotatably installed on the inner outer edge of the shell portion 811. A threaded groove 815 is recessed in the inner wall of the rotating connection cylinder 812. A connection installation shell 821 is provided on the outer side of the outer wall of the connection socket 82. The outer wall of the connection installation shell 821 is installed in the middle of the inner wall of the connection cavity 813, and the connection socket 82 is located in the middle cavity of the rotating connection cylinder 812. A plurality of power plug holes 822 are recessed on the inner side of the connection socket 82. The plurality of power plug holes 822 are respectively arranged opposite to the plurality of electrode needles 725. The connection clamping element 83 is installed in the rotating connection cylinder 812.

[0039] A trigger sliding groove 816 is recessed on the inner outer edge of the rotating connecting cylinder 812, a linkage sliding groove 817 is recessed in the middle of the trigger sliding groove 816, a connecting sliding groove 818 is recessed on the inner wall of the linkage sliding groove 817, the connecting sliding groove 818 is connected to the internal cavity of the rotating connecting cylinder 812, and an inclined preset groove 819 is recessed on the outer side of the inner wall of the connecting sliding groove 818.

[0040] The connecting clamping element 83 includes a trigger slide 831, a trigger pressure plate 832 and an arc-shaped clamping plate 833. The trigger slide 831 is slidably installed on the inner side of the connecting slide groove 818. A first spring 835 is arranged between the outer side of the trigger slide 831 and the side plate of the connecting slide groove 818. The middle part of the trigger pressure plate 832 is rotatably installed in the trigger slide 831 through a torsion spring. An arc-shaped surface 836 is recessed at the outer end of the trigger pressure plate 832. The arc-shaped clamping plate 833 is slidably installed in the trigger sliding groove 816. A trigger linkage plate 834 is convexly provided on the middle part of the inner wall of the arc-shaped clamping plate 833. The trigger linkage plate 834 is abutted on the arc-shaped surface 836, and a second spring 837 is arranged between the inner side of the trigger linkage plate 834 and the outer side of the linkage slide groove 817.

[0041] The present invention also provides a charging system for a portable fast charger, including a battery and a boost rectifier module. The battery is used for emergency charging and discharging, and the boost rectifier module is used to convert different charging voltages into a fast charging voltage of 380V. The electric gun connector 62 is electrically connected to the battery and the boost rectifier module, and the two charging connector assemblies 70 are electrically connected to the battery and the boost rectifier module.

[0042] For example, in one embodiment: a first connection cable is arranged on the cable connection hole 814 of one quick connection assembly 80, and a household plug is arranged on the other end of the first connection cable; a second connection cable is arranged on the cable connection hole 814 of another quick connection assembly 80, and a vehicle charging gun is arranged on the other end of the second connection cable; a charging gun placement groove 19 and a charging cable installation hole 18 are recessed in the middle of one side of the electric pile housing 10, and a charging cable is arranged on the charging cable installation hole 18, one end of the charging cable is connected to the bidirectional converter module 40 by wire, and a charging gun is arranged on the other end of the charging cable, and the charging gun is stuck in the charging gun placement groove 19. Multiple connection wires 721 are all connected to the battery and the boost rectifier module by wire.

[0043] For example, in one embodiment: when the quick connection assembly 80 needs to be clamped on the charging connector assembly 70, the multiple plug-in holes 822 are respectively arranged opposite to the multiple electrode needles 725, and the outer end of the rotating connection cylinder 812 is located between the rotating connection cylinder 812 and the connecting socket 82, and then the quick connection assembly 80 is pushed to move to one side of the charging connector assembly 70, so that the clamping sliding cylinder 731 follows the movement along the sliding annular groove 716, and when the threaded protrusion of the threaded cylinder 726 enters into the inner wall of the rotating connection cylinder 812, the rotating connection cylinder 812 is then rotated, so that the threaded cylinder 726 is gradually threadedly installed in the threaded groove 815, and the multiple electrode needles 725 are gradually inserted into the multiple plug-in holes 822 to ensure the smoothness and stability of the plug-in.

[0044] And when the threaded barrel 726 is threadedly installed in the threaded groove 815, the outer side of the threaded barrel 726 will press against the trigger pressure plate 832 and move along it, so that the trigger slide 831 moves along it, and the trigger linkage plate 834 moves along it, so that the arc-shaped clamping plate 833 moves along the trigger sliding groove 816, until the threaded barrel 726 is completely threadedly installed in the threaded groove 815, the inner end of the arc-shaped clamping plate 833 will be pushed and clamped by the threaded barrel 726 and rotate around the trigger slide 831 and fit on the inclined preset groove 819, and due to the rotation of the arc-shaped clamping plate 833, the trigger linkage plate 834 will no longer be pressed and clamped by the trigger pressure plate 832, and under the action of the elastic force of the second spring 837, the outer side of the arc-shaped clamping plate 833 will protrude outside the trigger sliding groove 816 and be clamped in the clamping groove 715.

[0045] At the same time, when the clamping sliding cylinder 731 moves inward along the sliding annular groove 716, the clamping annular groove 736 will compress the middle part of the elastic deformation ring 732 to deform and protrude, thereby pushing the rubber ring 733 to expand and deform outward and enter between the conical groove 723 and the docking annular groove 735, and then use the rubber ring 733 and the elastic deformation ring 732 to provide buffering for the plug-in and absorb vibration during the charging process.

[0046] Installation process: install the electric pile shell 10 in the installation ground, connect the power inlet 12 to the cable of the power grid, install the filter 20 at the bottom of the installation cavity 11, and the filter 20 is electrically connected to the power grid, the differential protection module 30, the bidirectional converter module 40 and the main control module 50 are all installed at the top of the installation cavity 11, the differential protection module 30 is electrically connected to the filter 20, and the bidirectional converter module 40 is electrically connected to the differential protection module 30, install the outer wall of the fixed installation part 711 in the inner wall of the charging installation hole 63, install the inner side of the card-mounted installation part 712 on the outer side of the fixed installation part 711, and the inner side of the electric plug 72 is fixedly installed in the plug installation hole 713, the sliding ring 734 is slidably installed in the sliding annular groove 716, and the inner side of the elastic deformation ring 732 is set in the supporting annular groove 724, and the elastic deformation ring 732 is set in the supporting annular groove 724. The outer side of the deformation ring 732 is arranged in the docking annular groove 735, and the inner wall of the elastic deformation ring 732 is fitted to the outer side of the outer wall of the electric plug 72, the inner wall of the rubber ring 733 is fitted to the middle part of the outer wall of the elastic deformation ring 732, and the rubber ring 733 is located between the limiting clamping ring 722 and the sliding ring 734, the outer side of the rotating connecting cylinder 812 is rotatably installed on the inner outer edge of the shell part 811, the outer wall of the connecting mounting shell 821 is installed in the middle part of the inner wall of the connecting cavity 813, and the connecting socket 82 is located in the middle cavity of the rotating connecting cylinder 812, the trigger slide 831 is slidably installed on the inner side of the connecting slide groove 818, the middle part of the trigger pressure plate 832 is rotatably installed in the trigger slide 831 through a torsion spring, the arc clamping plate 833 is slidably installed in the trigger sliding groove 816, and the trigger linkage plate 834 is supported on the arc surface 836.

[0047] The present invention can achieve:

[0048] 1. The present invention can compare the current or voltage data at different positions or phases in the circuit, identify the situation in the circuit, and provide real-time and accurate current or voltage data at multiple points, thereby preventing the system from misjudging an overcurrent or overvoltage situation caused by a sudden instantaneous voltage or current fluctuation at a certain point, and effectively preventing the misjudgment of an overcurrent or overvoltage situation caused by a sudden voltage or current fluctuation in the power grid. Through monitoring, judgment and control, the protection system can effectively monitor and protect against abnormal situations such as overcurrent and overvoltage, thereby ensuring the safety of equipment and users.

[0049] 2. The present invention can ensure the stability and stability during the charging / discharging connection process, reduce deviation or shaking during connection, protect the charging device and the battery, avoid damage or safety risks caused by poor connection, and can realize the automatic locking of the quick connection component 80 and the charging connector component 70 to each other to prevent the connection from loosening or disconnecting due to external factors such as vibration and pulling, thereby ensuring the continuity and safety of the charging process. At the same time, it can provide a buffer for the connection process and absorb the vibration that may be generated during the charging process, reduce mechanical stress concentration and wear, and extend the service life of the components.

[0050] The above-mentioned embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A portable fast charger, characterized in that: The portable charger (60) comprises two charging connector assemblies (70) and two quick connection assemblies (80); an input hole (61) is recessed at a corner of the top outer side of the portable charger (60); an electric gun connection head (62) is disposed on the input hole (61); two charging installation holes (63) are recessed at the top outer side of the portable charger (60); the two charging connector assemblies (70) are respectively installed in the two charging installation holes (63); and the two quick connection assemblies (80) are respectively clamped and installed on the outer sides of the two charging connector assemblies (70); Each charging connector assembly (70) comprises a connector housing (71), an electric plug (72) and a charging clamping element (73); the connector housing (71) comprises a fixed mounting portion (711) and a clamping mounting portion (712); the outer wall of the fixed mounting portion (711) is mounted on the inner wall of the charging mounting hole (63); a plug mounting hole (713) is recessed in the middle of the inner side of the fixed mounting portion (711); the inner side of the clamping mounting portion (712) is mounted on the outer side of the fixed mounting portion (711); a hollow cavity (714) is formed in the inner wall of the clamping mounting portion (712); the hollow cavity (714) is connected to the plug mounting hole (713); a clamping groove (715) is recessed in the outer side of the hollow cavity (714); and a plug mounting hole (713) is recessed in the middle of the inner wall of the hollow cavity (714). The electric plug (72) is fixedly mounted in the plug mounting hole (713) on the inner side, a plurality of connecting wires (721) are arranged on the inner side of the electric plug (72), a limiting clamp (722) is convexly arranged on the middle part of the outer wall of the electric plug (72), the outer wall of the limiting clamp (722) is fixedly connected to the inner side of the inner wall of the hollow cavity (714), a conical groove (723) is concavely arranged on the middle part of the outer side of the limiting clamp (722), a supporting annular groove (724) is concavely arranged on the outer side of the limiting clamp (722), a plurality of electrode pins (725) are convexly arranged on the middle part of the outer side of the electric plug (72), a threaded barrel (726) is convexly arranged on the outer edge of the outer side of the electric plug (72), and a charging clamping element (73) is installed in the hollow cavity (714) and the clamping groove (715); The charging clamping element (73) comprises a clamping sliding cylinder (731), an elastic deformation ring (732) and a rubber ring (733); a sliding ring (734) is convexly provided on the inner side of the outer wall of the clamping sliding cylinder (731); the sliding ring (734) is slidably installed in the sliding annular groove (716); a butting annular groove (735) is concavely provided on the inner side of the sliding ring (734); a clamping annular groove (736) is concavely provided in the center of the inner side of the sliding ring (734); the inner side of the elastic deformation ring (732) is arranged in the supporting annular groove (724); the outer side of the elastic deformation ring (732) is arranged in the butting annular groove (735); the inner wall of the elastic deformation ring (732) is attached to the outer side of the outer wall of the electric plug (72); the inner wall of the rubber ring (733) is attached to the middle part of the outer wall of the elastic deformation ring (732); and the rubber ring (733) is located between the limiting clamping ring (722) and the sliding ring (734); Each quick connection assembly (80) comprises a quick connection housing (81), a connection socket (82) and a connection clamping element (83); the quick connection housing (81) comprises a housing portion (811) and a rotating connection cylinder (812); a connection cavity (813) is recessed in the middle of the inner side of the housing portion (811); a cable connection hole (814) is recessed in the middle of the inner side of the connection cavity (813); the outer side of the rotating connection cylinder (812) is rotatably mounted on the inner outer edge of the housing portion (811); and the inner wall of the rotating connection cylinder (812) is recessed. A thread groove (815) is provided, and a connection mounting shell (821) is provided on the outer side of the outer wall of the connection socket (82), and the outer wall of the connection mounting shell (821) is mounted on the middle part of the inner wall of the connection cavity (813), so that the connection socket (82) is located in the middle cavity of the rotating connection cylinder (812), and a plurality of power plug holes (822) are recessed on the inner side of the connection socket (82), and the plurality of power plug holes (822) are respectively arranged opposite to the plurality of electrode needles (725), and the connection clamping element (83) is installed in the rotating connection cylinder (812).

2. The portable fast charger according to claim 1, characterized in that: A trigger sliding groove (816) is recessed on the inner outer edge of the rotating connecting cylinder (812), a linkage sliding groove (817) is recessed in the middle of the trigger sliding groove (816), a connecting sliding groove (818) is recessed on the inner wall of the linkage sliding groove (817), the connecting sliding groove (818) is connected to the internal cavity of the rotating connecting cylinder (812), and an inclined preset groove (819) is recessed on the outer side of the inner wall of the connecting sliding groove (818).

3. The portable fast charger according to claim 2, characterized in that: The connecting clamping element (83) comprises a trigger slide (831), a trigger pressure plate (832) and an arc-shaped clamping plate (833); the trigger slide (831) is slidably mounted on the inner side of the connecting slide groove (818); a first spring (835) is arranged between the outer side of the trigger slide (831) and the side plate of the connecting slide groove (818); the middle part of the trigger pressure plate (832) is rotatably mounted in the trigger slide (831) through a torsion spring; an arc-shaped surface (836) is concavely arranged at the outer end of the trigger pressure plate (832); the arc-shaped clamping plate (833) is slidably mounted in the trigger slide groove (816); a trigger linkage plate (834) is convexly arranged on the middle part of the inner wall of the arc-shaped clamping plate (833); the trigger linkage plate (834) is abutted against the arc-shaped surface (836); and a second spring (837) is arranged between the inner side of the trigger linkage plate (834) and the outer side of the linkage slide groove (817).

4. A charging system for a portable fast charger, characterized in that: It comprises a battery and a boost rectifier module, the battery is used for emergency charging and discharging, the boost rectifier module is used for converting different charging voltages into a fast charging voltage of 380V, and the electric gun connector (62) of any one of claims 1 to 3 is electrically connected to the battery and the boost rectifier module, and the two charging connector assemblies (70) are electrically connected to the battery and the boost rectifier module.

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