An external AC discharging device for electric vehicles

Abstract

The utility model discloses a kind of external AC discharging devices for electric vehicle, including handle and the plug connected with electric vehicle, the plug is fixedly connected at the front end surface of handle, lining is fixedly installed in the plug interior, the lining middle fixedly passes and is equipped with conductive pin, PCB board is installed in the handle interior, the conductive pin is connected with PCB board by wire;The rear end of the handle is fixedly installed with fixed seat, the socket for connecting load is installed in the fixed seat, the socket is connected with PCB board by wire, the rear end surface of the fixed seat movably installs protective flap.The utility model overcomes the deficiency of prior art, compact structure is reasonable, installation is stable, with plug and play, strong compatibility, high safety, good portability and the like advantages.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, specifically to a device for external AC discharge of electric vehicles. Background Technology

[0002] With the transformation of the global energy structure and the increasing awareness of environmental protection, the electric vehicle (EV) industry has developed rapidly. Electric vehicles are no longer just a means of transportation, but are also regarded as mobile, clean energy storage units. Against this backdrop, vehicle-to-load (V2L) technology has emerged, which allows the electric vehicle's battery to provide AC power to external electrical devices through a specific discharge device.

[0003] Currently, V2L solutions on the market can be mainly divided into two categories, but they all have obvious limitations.

[0004] The first common type of solution is the non-integrated external charging device. This type of device is typically a standalone, relatively bulky unit (often described as a "big box"). One end connects to the vehicle via a high-power DC charging interface (such as CCS Combo or CHAdeMO), while the other end provides a standard AC power outlet (such as a Chinese or European standard outlet). However, this type of solution has several drawbacks: First, the device is bulky and inconvenient to carry, contradicting users' need for portability; second, its reliance on costly DC fast charging interface hardware and complex control circuitry results in a high overall cost; finally, its operation requires the vehicle to support specific, non-standard communication protocols for handshaking and activation, limiting compatibility—not all electric vehicles with DC fast charging ports support it, introducing significant uncertainty for users.

[0005] The second approach attempts to achieve reverse discharge using the vehicle's on-board charger (OBC). The basic principle is to utilize the OBC's inherent inverter function to convert the battery's DC power into AC power. Ideally, this approach would directly utilize the vehicle's AC charging interface for discharge. However, the core challenge lies in establishing a safe, compliant, and reliable connection with the vehicle's external charging interface. This is particularly true for electric vehicles using EU standard (EN IEC 62196-2) AC charging interfaces (i.e., "Type 2" interfaces). The physical structure, pin definitions, and safety communication protocols (such as ISO 15118) of these interfaces are specifically designed for "grid-based" charging modes. Key components in the interface, such as the control guidance circuit (CP) and proximity pin, are used in standard procedures to confirm the charging connection status and load-bearing capacity. Directly using these components in a discharge scenario presents electrical safety risks, protocol incompatibility, and unreliable mechanical connections, making it difficult to meet the requirements of relevant international safety standards (such as IEC 61851 and IEC 62752). Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides an AC discharge device for electric vehicles, which overcomes the shortcomings of the prior art, has a compact and reasonable structure, is stable to install, and has the advantages of plug-and-play, strong compatibility, high safety and good portability.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An AC discharge device for an electric vehicle includes a handle and a plug connected to the electric vehicle. The plug is fixedly connected to the front end of the handle. An inner liner is fixedly installed inside the plug. A conductive pin is fixedly inserted through the middle of the inner liner. A PCB board is installed inside the handle. The conductive pin is connected to the PCB board through a wire.

[0009] The handle has a fixed base at its rear end, and a socket for connecting a load is installed inside the fixed base. The socket is connected to the PCB board via a wire, and a protective flip cover is movably installed on the rear end face of the fixed base.

[0010] Preferably, the handle has grooves on the left and right sides of its inner wall, and a rib is fixedly provided at the rear end of the groove. The groove matches the two sides of the PCB board, and the PCB board is snapped and fixed in the groove and limited by the rib.

[0011] Preferably, an abutment block is fixedly connected to the rear side of the liner, and the abutment block abuts against the front end face of the PCB board.

[0012] Preferably, a pressure cap is fixedly installed at the rear end of the inner cavity of the handle, the socket is fixed between the pressure cap and the fixed base, and the wiring terminal of the socket passes through the through hole of the pressure cap.

[0013] Preferably, female buckle grooves are provided on both the left and right sides of the pressure cap, and male buckle blocks are provided on the left and right side walls of the inner cavity of the fixing seat, and the female buckle grooves and male buckle blocks are engaged and locked together.

[0014] Preferably, the upper surface of the pressure cap is provided with a fixing plate, the upper front end of the fixing seat is provided with a threaded mounting hole, the fixing plate and the threaded mounting hole are connected by screws, the front end face of the pressure cap is fixedly provided with a first threaded post, the inner cavity side wall of the handle is fixedly provided with a second threaded post, and the first threaded post and the second threaded post are connected by screws.

[0015] Preferably, the inner liner surface is integrally provided with a plurality of support posts, and the conductive pin passes through the support posts and is fixed to the inner liner by the support posts.

[0016] Preferably, a rotating shaft is fixedly connected to the upper side of the socket flip cover, and a rotating shaft seat is provided above the rear end face of the fixed seat. The socket flip cover is rotatably connected to the rotating shaft seat through the rotating shaft. A torsion spring is sleeved on the outer surface of the rotating shaft. One end of the torsion spring is connected to the rotating shaft seat, and the other end of the torsion spring is connected to the socket flip cover.

[0017] This invention provides an AC discharge device for electric vehicles, offering the following advantages: By embedding the PCB board inside the handle, the device fully utilizes the handle space, achieving a high degree of integration. Compared to traditional standalone "box"-style discharge devices, it eliminates redundant outer shells and connecting cables, significantly reducing size and weight, greatly improving portability and making it convenient for users to carry and use in their vehicles. It also minimizes the power transmission path, reducing internal cable detours, thus lowering energy loss and improving the overall mechanical integrity of the device. The conductive pins are fixed by an inner liner, ensuring even force distribution during insertion and removal, preventing poor contact due to loosening or misalignment; simultaneously, the inner liner is made of high-strength insulating material, effectively isolating high-voltage components and enhancing safety. The entire device requires no additional intermediate equipment or lengthy cables, making it extremely convenient to carry and use, greatly meeting users' needs for portability and ease of use in outdoor camping, emergency power supply, and other scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0019] Figure 1 A schematic diagram of the structure of this utility model;

[0020] Figure 2 A schematic diagram of the handle in this utility model;

[0021] Figure 3 A schematic diagram of the inner lining in this utility model;

[0022] Figure 4 A schematic diagram of the structure of the fixed base in this utility model;

[0023] Figure 5 A schematic diagram of the structure of the pressure cap in this utility model;

[0024] Explanation of the labels in the diagram:

[0025] 1. Handle; 2. Plug; 3. Liner; 4. Conductive pin; 5. PCB board; 6. Wire; 7. Socket; 8. Protective flip cover; 9. Groove; 10. Rib; 11. Abutment block; 12. Pressure cover; 13. Fixing base; 14. Female buckle groove; 15. Female buckle block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] Example 1, as Figure 1-5 As shown, an AC discharge device for an electric vehicle includes a handle 1 and a plug 2 connected to the electric vehicle. The plug 2 is fixedly connected to the front end of the handle 1. An inner liner 3 is fixedly installed inside the plug 2, and a conductive pin 4 is fixedly inserted through the middle of the inner liner 3. A PCB board 5 is installed inside the handle 1, and the conductive pin 4 is connected to the PCB board 5 via a wire 6. In this embodiment, the PCB board 5 integrates a complete safety monitoring circuit for overcurrent, overvoltage, undervoltage, overtemperature, and leakage protection (this is prior art and will not be described further). It can monitor the entire discharge process in real time and immediately cut off power upon detecting an abnormality, effectively protecting the electric vehicle battery, the device itself, and the connected external load.

[0028] A mounting base 13 is fixedly installed at the rear end of the handle 1. A socket 7 for connecting the load is installed inside the mounting base 13. The socket 7 is connected to the PCB board 5 through wires. A protective flip cover 8 is movably installed on the rear end face of the mounting base 13.

[0029] Working principle:

[0030] When in use, plug 2 is inserted into the charging port of the electric vehicle, and the conductive pin 4 makes contact with the internal contacts of the vehicle to establish a circuit connection. After the physical connection is reliably established, the control circuit on the PCB board 5 starts to work, and AC power is transmitted to the socket in the mounting bracket through the wires connected to the PCB board. At this time, the protective cover can be opened to connect external electrical equipment to the socket, thereby realizing the AC discharge function of the electric vehicle to external devices.

[0031] This invention cleverly integrates the PCB board 5 into the handle 1, making full use of the handle space and achieving a high degree of device integration. Compared to traditional independent "box"-style discharge devices, it eliminates redundant outer shells and connecting cables, significantly reducing size and weight, greatly improving portability and making it convenient for users to carry in their vehicles and use anytime. It also minimizes the power transmission path, reducing internal cable detours, thus reducing energy loss and improving the overall mechanical integrity of the device. Compared to the traditional solution of placing the inverter or control unit in a separate enclosure, this structure avoids the risk of dragging and damage to intermediate connecting cables, resulting in a stronger overall device, better vibration and impact resistance, and more stable and reliable operation. The conductive pins 4 are fixed by the inner liner 3, ensuring even force distribution during insertion and removal, preventing poor contact due to loosening or misalignment; simultaneously, the inner liner 3 is made of high-strength insulating material, effectively isolating high-voltage components and improving safety. When using the device, users simply insert its plug 2 into the electric vehicle and then insert the electrical plug into the device's socket 7; the process is simple and intuitive, achieving true "plug and play." The entire device requires no additional intermediate equipment or long cables, making it very convenient to carry and use, and greatly satisfying users' needs for portability and ease of use in outdoor camping, emergency power supply and other scenarios.

[0032] Example 2, as Figure 2 As shown, in a further preferred embodiment, the handle 1 has grooves 9 on both the left and right sides of its inner wall. A rib 10 is fixedly provided at the rear end of the inner cavity of the groove 9. The grooves 9 match the two side edges of the PCB board 5, and the PCB board 5 is snapped into and fixed within the grooves 9 and limited by the rib 10. By providing grooves 9 on the inner wall of the handle 1 that match the two side edges of the PCB board 5, it is ensured that the PCB board can be quickly and accurately guided to the predetermined position during installation, avoiding offset or tilting during the installation process. Furthermore, the grooves 9 wrap around and support the edges of the PCB board 5 from both sides, greatly increasing the contact area and support points between the PCB board 5 and the handle 1.

[0033] Example 3, as Figure 3As shown, in a further preferred embodiment of the second embodiment, an abutment block 11 is fixedly connected to the rear side of the liner 3, and the abutment block 11 abuts against the front end face of the PCB board 5. By contacting the front end face of the PCB board 5 with the abutment block 11, it can cooperate with the groove 9 and the rib 10 to achieve limiting and fixing of the PCB board in four directions (front, back, left, and right), effectively preventing it from shifting or vibrating and loosening during vehicle bumps or use, further improving the stability and shock resistance of the internal electronic components. During assembly, when the operator pushes the PCB board 5 backward along the groove 9, there is no need to accurately measure the pushing depth; it is sufficient to push it until its front end face is in close contact with the abutment block 11. This ensures that the position of the PCB board 5 inside the handle 1 is consistent and accurate in every product. This not only ensures the stability of the connection length of the internal wires 6, but also avoids problems such as wires being too long (easily tangled) or too short (under tension) due to inaccurate PCB board 5 positioning.

[0034] In Embodiment Four, as a further preferred embodiment of Embodiment One, a pressure cap 12 is fixedly installed at the rear end of the inner cavity of the handle 1. The socket 7 is fixed between the pressure cap 12 and the fixing seat 13, and the wiring terminal of the socket 7 passes through the through hole of the pressure cap 12. The pressure cap 12 and the fixing seat 13 jointly clamp and fix the socket 7, thereby providing the socket 7 with uniform and firm surface contact support, making it less prone to loosening or displacement when subjected to external force for insertion or removal. In addition, the pressure cap 12 can also serve as a key insulating partition, physically isolating the live wiring terminal of the socket 7 from other parts of the inner cavity of the handle 1. By confining the high-voltage wiring area to the side of the pressure cap 12 near the socket 7, while isolating the low-voltage control lines (connecting to the PCB board) and internal wiring areas on the other side, the risk of short circuits between the high-voltage and low-voltage parts due to wire wear, accidental contact, or condensation is greatly reduced.

[0035] Example 5, such as Figure 4-5 As shown, in a further preferred embodiment, the pressure cap 12 has female snap-fit ​​grooves 14 on both its left and right sides, and the fixing base 13 has corresponding male snap-fit ​​blocks 15 on its left and right side walls. The female snap-fit ​​grooves 14 and male snap-fit ​​blocks 15 engage with each other. Through the engagement of the female snap-fit ​​grooves 14 and male snap-fit ​​blocks 15, a quick snap-fit ​​fixation between the pressure cap 12 and the fixing base 13 is achieved. Once the snap-fit ​​is successful, the position of the pressure cap 12 in both the horizontal and vertical directions is precisely defined, effectively preventing displacement or misalignment of the pressure cap 12 during subsequent screw tightening. This ensures that the socket 7 is always accurately fixed in its designed position, and its wiring terminals can smoothly pass through the through holes on the pressure cap 12 without interference or stress concentration with the hole walls, thus guaranteeing the structural reliability and electrical safety for long-term use.

[0036] In Example Six, as a further preferred embodiment of Example Five, a fixing plate is provided on the upper surface of the pressure cap 12, and a threaded mounting hole is provided above the front end of the fixing seat 13. The fixing plate and the threaded mounting hole are connected by screws. A first threaded post is fixedly provided on the front end face of the pressure cap 12, and a second threaded post is fixedly provided on the inner side wall of the handle 1. The first threaded post and the second threaded post are connected by screws. Therefore, during assembly, the pressure cap and the fixing seat can be quickly snapped together and positioned by the cooperation of the female snap-fit ​​groove and the male snap-fit ​​block to complete the initial fixation. Then, the fixing plate and the threaded mounting hole are locked together by screws to achieve double fixation, making the connection between the pressure cap and the fixing seat exceptionally stable. Even under long-term vibration environment, even if the screws show a very slight tendency to loosen, the snap-fit ​​structure can continue to maintain the relative position of the components, effectively preventing the loosening from worsening and greatly improving the durability of the product in the vehicle mobile environment. Through the "snap-fit ​​first, screw later" assembly sequence, the convenience and error prevention of the snap-fit ​​are perfectly combined with the high strength and high reliability of the screw connection. It ensures both assembly efficiency on the production line and unparalleled structural robustness of the final product.

[0037] In Example 7, as a further preferred embodiment, the inner liner 3 has multiple support posts integrally formed on its surface. The conductive pins 4 pass through and are fixed to the inner liner 3 via these support posts. The support posts provide dedicated, high-precision positioning and support for each conductive pin 4, effectively preventing problems such as poor contact or inability to insert due to pin 4 misalignment or spacing errors. Each conductive pin 4 is encased in an independent support post, receiving comprehensive support and greatly enhancing its resistance to bending and deformation. Whether subjected to axial force during insertion / removal or vibrations encountered during use, the conductive pins 4 remain stable, ensuring the continuity and stability of power transmission and fundamentally eliminating safety hazards such as arcing and overheating caused by poor contact.

[0038] Example 8, a further preferred embodiment of Example 7, features a rotating shaft fixedly connected to the upper side of the socket flip cover 8. A rotating shaft seat is located above the rear end face of the fixing base 13. The socket flip cover 8 is rotatably connected to the rotating shaft seat via the rotating shaft. A torsion spring 16 is fitted onto the outer surface of the rotating shaft. One end of the torsion spring 16 is connected to the rotating shaft seat 13, and the other end is connected to the socket flip cover 8. The elastic force of the torsion spring 16 provides a continuous and stable automatic closing force for the socket flip cover 8, ensuring normal protection when not in use. When the user opens the flip cover and connects a load, once the plug is unplugged, the flip cover will automatically, quickly, and smoothly close under the restoring torque of the torsion spring. This fundamentally avoids the problem of the flip cover remaining open for extended periods due to forgetfulness or inconvenience.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for external AC discharge of an electric vehicle, comprising a handle (1) and a plug (2) connected to the electric vehicle, characterized in that: The plug (2) is fixedly connected to the front end of the handle (1). The plug (2) has a liner (3) fixedly installed inside. A conductive pin (4) is fixedly inserted in the middle of the liner (3). A PCB board (5) is installed inside the handle (1). The conductive pin (4) is connected to the PCB board (5) through a wire (6). The handle (1) has a fixed base (13) fixedly installed at its rear end. The fixed base (13) has a socket (7) for connecting the load installed inside. The socket (7) is connected to the PCB board (5) through a wire. The fixed base (13) has a protective flip cover (8) movably installed on its rear end face.

2. The AC discharge device for electric vehicles according to claim 1, characterized in that: The handle (1) has grooves (9) on the left and right sides of its inner wall. A rib (10) is fixedly provided at the rear end of the inner cavity of the groove (9). The groove (9) matches the two sides of the PCB board (5). The PCB board (5) is snapped and fixed in the groove (9) and limited by the rib (10).

3. The AC discharge device for electric vehicles according to claim 2, characterized in that: The rear side of the liner (3) is fixedly connected to an abutment block (11), which abuts against the front end of the PCB board (5).

4. The AC discharge device for electric vehicles according to claim 1, characterized in that: A pressure cap (12) is fixedly installed at the rear end of the inner cavity of the handle (1), and the socket (7) is fixed between the pressure cap (12) and the fixed seat (13), and the wiring terminal of the socket (7) passes through the through hole of the pressure cap (12).

5. A device for external AC discharge of an electric vehicle according to claim 4, characterized in that: The pressure cap (12) is provided with female buckle grooves (14) on both the left and right sides, and the inner walls of the fixing seat (13) are provided with male buckle blocks (15) respectively. The female buckle grooves (14) and male buckle blocks (15) are engaged and snapped together.

6. A device for external AC discharge of an electric vehicle according to claim 1, characterized in that: The upper surface of the pressure cap (12) is provided with a fixing hole plate, and the front end of the fixing seat (13) is provided with a threaded mounting hole. The fixing hole plate and the threaded mounting hole are connected by screws. The front end face of the pressure cap (12) is fixedly provided with a first screw hole post, and the inner cavity side wall of the handle (1) is fixedly provided with a second screw hole post. The first screw hole post and the second screw hole post are connected by screws.

7. A device for external AC discharge of an electric vehicle according to claim 1, characterized in that: The inner liner (3) has multiple support holes integrally formed on its surface. The conductive pin (4) passes through the support holes and is fixed to the inner liner (3) through the support holes.

8. A device for external AC discharge of an electric vehicle according to claim 1, characterized in that: The upper side of the socket flip cover (8) is fixedly connected to a rotating shaft, and a rotating shaft seat is provided above the rear end face of the fixed seat (13). The socket flip cover (8) is rotatably connected to the rotating shaft seat through the rotating shaft. A torsion spring (16) is sleeved on the outer surface of the rotating shaft. One end of the torsion spring (16) is connected to the rotating shaft seat, and the other end of the torsion spring (16) is connected to the socket flip cover (8).

Images