Signal connection structure of charging gun for electric vehicle

Abstract

The utility model relates to the technical field of new energy electric vehicles, and discloses a signal connection structure of a charging gun for an electric vehicle, which comprises a charging gun head shell, a charging gun handle shell, a signal terminal, a signal cable and a signal adapter plate assembly, the substrate is provided with contact elastic pieces corresponding to the signal terminals and board end signal connectors corresponding to the signal cables, the contact elastic pieces are in contact conduction with the terminal contact areas in the protection containing cavity, and the board end signal connectors are coupled with the line end signal connectors. According to the signal connection structure of the charging gun for the electric vehicle, the signal terminal and the signal cable are in butt joint through the signal adapter plate assembly, rapid and reliable connection of the signal cable is achieved, the production process steps are simplified, the wiring mode is simplified, the wiring error risk is reduced, and stable signal transmission is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy electric automobile technical field especially relates to a signal connection structure of charging gun for electric automobile. BACKGROUND

[0002] With the rapid development of electric automobile technology, the electronic control system is increasingly important in new energy vehicles. During the charging process, the integrity and reliability of signal transmission must be ensured. The electric vehicle charging gun terminal is mainly composed of charging power terminal and signal terminal. Most of the signal terminals of the charging gun are directly connected with the cable by riveting or welding. Because there are more than 10 signal lines in the high-power charging gun, the process steps are complicated when assembling the charging gun, the wiring method is relatively chaotic, and there is a probability of wiring error.

[0003] At present, the number of electric vehicles is increasing, and the use frequency of high-power charging guns arranged in public charging stations is also increasing. The signal terminal of the charging gun is relatively thin and is easily bent or worn during the charging process. When repairing the charging gun, it is difficult to replace the signal terminal directly welded or riveted with the cable. SUMMARY

[0004] The utility model aims at providing a signal connection structure of charging gun for electric automobile to solve the problem of the current direct connection process of cable, which is complicated and has a high probability of wiring error.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A signal connection structure of charging gun for electric automobile, comprising a charging gun head shell, a charging gun handle shell, a signal terminal, a signal cable and a signal adapter plate assembly, wherein:

[0007] The charging gun head shell and the charging gun handle shell are combined to form a charging gun shell, and an installation cavity is formed in the inside of the charging gun shell;

[0008] A plurality of signal terminals are installed on the charging gun head shell, and a protection cavity is provided on the signal terminal, and a terminal contact area is provided in the protection cavity;

[0009] A plurality of signal cables pass through the charging gun handle shell, and a wire end signal connector is provided at the end of the signal cable;

[0010] The signal adapter plate assembly is arranged in the installation cavity, and the signal adapter plate assembly comprises a base plate, a contact spring corresponding to each signal terminal and a plate end signal connector corresponding to each signal cable are arranged on the base plate, the contact spring is in contact with the terminal contact area in the protection cavity, and the plate end signal connector is coupled with the wire end signal connector.

[0011] As an alternative, a printed circuit is arranged in the substrate, and a signal contact pad is arranged on the substrate corresponding to each contact spring; a spring welding pin and a spring cantilever are arranged on the contact spring, the spring welding pin is welded with the signal contact pad, and the spring cantilever is in elastic contact with the terminal contact area; a connector pad is arranged on the substrate corresponding to each board end signal connector; a connector welding pin and a connector coupling cavity are arranged on the board end signal connector, the connector welding pin is welded with the connector pad, and the connector coupling cavity is matched with the wire end signal connector for plug-in connection.

[0012] As an alternative, a grounding cable is also arranged in the handle shell of the charging gun, a grounding jack is arranged on the head shell of the charging gun, a grounding terminal is arranged in the mounting cavity, and a contact ring is arranged on the substrate; the head end of the grounding terminal is a coupling contact area extending into the grounding jack, the tail end of the grounding terminal is arranged with a rivet cavity for fixing the grounding cable, and the middle part of the grounding terminal is a signal contact area in contact with the contact ring.

[0013] As an alternative, a grounding spring cavity for mounting the contact ring is arranged on the substrate, and a plurality of grounding spring pads are arranged on the substrate outside the grounding spring cavity; a grounding welding pin and a contact cantilever are arranged on the contact ring, the grounding welding pin is welded with the grounding spring pad, and the contact cantilever is in elastic contact with the signal contact area.

[0014] As an alternative, a plurality of resistance welding pads are also arranged on the substrate, and a coding resistance is welded on the resistance welding pad.

[0015] As an alternative, the plurality of signal contact pads are arranged on the upper half of one side of the substrate close to the head shell of the charging gun; the plurality of connector pads are arranged on the upper half of one side of the substrate close to the handle shell of the charging gun; the grounding spring cavity and the plurality of grounding spring pads are arranged on the lower half of one side of the substrate close to the handle shell of the charging gun; and the plurality of resistance welding pads are arranged on the middle part of one side of the substrate close to the handle shell of the charging gun.

[0016] As an alternative, a charging cable is also arranged in the handle shell of the charging gun, a charging jack is arranged on the head shell of the charging gun, a mounting seat is arranged in the mounting cavity, a power terminal is arranged on the mounting seat, the charging cable is connected to the mounting seat and the power terminal in a conductive manner, and the power terminal extends into the charging jack.

[0017] As an alternative, a connecting screw is arranged on the mounting seat for fixing the head shell of the charging gun, and the substrate is clamped between the mounting seat and the head shell of the charging gun.

[0018] As an alternative, a positioning protrusion is arranged on the surface of the head shell of the charging gun abutting against the substrate, and a positioning hole is arranged on the substrate corresponding to the positioning protrusion.

[0019] As an alternative, an avoiding opening is arranged on the substrate corresponding to the power terminal.

[0020] The utility model discloses the beneficial effect of:

[0021] The signal connection structure of the electric vehicle charging gun connects the signal terminal and the signal cable through the signal adapter plate assembly, realizes the quick and reliable connection of the signal cable, simplifies the production process steps, simplifies the wiring mode, reduces the wiring error risk, and ensures stable signal transmission. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Is the disassembly view of the signal connection structure of the electric vehicle charging gun provided by the utility model embodiment;

[0023] Figure 2 Is the sectional view of the signal connection structure of the electric vehicle charging gun provided by the utility model embodiment;

[0024] Figure 3 Is Figure 2 The enlarged view of A in the middle;

[0025] Figure 4 Is the first view of the signal adapter plate assembly;

[0026] Figure 5 Is the second view of the signal adapter plate assembly;

[0027] Figure 6 Is the end surface schematic view of the charging gun head shell;

[0028] Figure 7 Is the schematic view of the signal adapter plate assembly after being installed on the charging gun head shell;

[0029] Figure 8 Is the schematic view of the charging gun head shell after being installed with the mounting seat.

[0030] In the drawings:

[0031] 1, charging gun head shell;11, ground jack;12, charging jack;13, positioning column;

[0032] 2, charging gun handle shell;

[0033] 3, signal terminal;31, protection cavity;32, terminal contact area;

[0034] 4, signal cable;41, line end signal connector;

[0035] 5. Signal adapter board assembly; 51. Substrate; 511. Signal spring pad; 512. Connector pad; 513. Grounding spring cavity; 514. Grounding spring pad; 515. Resistance soldering pad; 516. Positioning hole; 517. Clearance opening; 52. Contact spring; 521. Spring soldering pin; 522. Spring cantilever; 53. Board-end signal connector; 531. Connector soldering pin; 532. Connector coupling cavity; 54. Contact ring; 541. Grounding soldering pin; 542. Contact cantilever; 55. Encoding resistor;

[0036] 6. Grounding cable;

[0037] 7. Grounding terminal; 71. Coupling contact area; 72. Riveting cavity; 73. Signal contact area;

[0038] 8. Charging cable;

[0039] 9. Mounting bracket;

[0040] 10. Power terminals. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0046] Please see Figures 1 to 8 As shown, this embodiment provides a signal connection structure for a charging gun for electric vehicles, including a charging gun head housing 1, a charging gun handle housing 2, a signal terminal 3, a signal cable 4, and a signal adapter board assembly 5, wherein:

[0047] The charging gun head housing 1 and the charging gun handle housing 2 are combined to form the charging gun shell, and the interior of the charging gun shell forms an installation cavity;

[0048] Several signal terminals 3 are installed on the charging gun head housing 1. A protective cavity 31 is provided on the signal terminal 3, and a terminal contact area 32 is provided inside the protective cavity 31.

[0049] Several signal cables 4 pass through the charging gun handle housing 2, and the ends of the signal cables 4 are provided with wire end signal connectors 41;

[0050] The signal adapter board assembly 5 is disposed in the mounting cavity. The signal adapter board assembly 5 includes a base plate 51. The base plate 51 is provided with contact springs 52 corresponding to each signal terminal 3 and board-end signal connectors 53 corresponding to each signal cable 4. The contact springs 52 are in contact with the terminal contact area 32 in the protective cavity 31 and conduction is achieved. The board-end signal connectors 53 are coupled with the line-end signal connectors 41.

[0051] Therefore, by connecting the signal terminal 3 to the signal cable 4 through the signal adapter board assembly 5, a quick and reliable connection of the signal cable 4 is achieved, simplifying the production process, simplifying the wiring method, reducing the risk of wiring errors, and ensuring stable signal transmission.

[0052] Optionally, a printed circuit is provided in the substrate 51. Signal spring pads 511 are provided on the substrate 51 corresponding to each contact spring 52. Spring soldering pins 521 and spring cantilever 522 are provided on the contact springs 52. The spring soldering pins 521 are soldered to the signal spring pads 511, and the spring cantilever 522 is in elastic contact with the terminal contact area 32. Connector pads 512 are provided on the substrate 51 corresponding to each board-end signal connector 53. Connector soldering pins 531 and connector coupling cavities 532 are provided on the board-end signal connector 53. Connector soldering pins 531 are soldered to the connector pads 512, and connector coupling cavities 532 are mated with the line-end signal connector 41.

[0053] This ensures that the contact spring 52 and the board-end signal connector 53 are reliably fixed and electrically connected on the base plate 51, facilitating efficient docking with the signal terminal 3 and signal cable 4, further enhancing the stability and durability of the overall structure, and ensuring the safety and reliability of the charging gun during use.

[0054] Furthermore, a grounding cable 6 is inserted into the charging gun handle housing 2, a grounding socket 11 is provided on the charging gun head housing 1, a grounding terminal 7 is provided in the mounting cavity, a contact ring 54 is provided on the base plate 51, the head end of the grounding terminal 7 is a coupling contact area 71 that extends into the grounding socket 11, the tail end of the grounding terminal 7 is provided with a rivet cavity 72 that is fixed to the grounding cable 6, and the middle part of the grounding terminal 7 is a signal contact area 73 that is in contact with the contact ring 54 and conducts electricity.

[0055] Thus, the grounding cable 6 passes through the charging gun handle housing 2 and is riveted to the end of the grounding terminal 7, and the contact ring 54 is connected to the signal contact area 73, ensuring the grounding safety of the charging gun, improving anti-interference ability, and ensuring a stable and efficient charging process.

[0056] Optionally, a grounding spring cavity 513 for mounting a contact ring 54 is formed on the substrate 51. A plurality of grounding spring pads 514 are provided on the substrate 51 and outside the grounding spring cavity 513. The contact ring 54 is provided with grounding solder pins 541 and contact cantilever 542. The grounding solder pins 541 are soldered to the grounding spring pads 514, and the contact cantilever 542 is in elastic contact with the signal contact area 73.

[0057] Therefore, the grounding spring cavity 513 is designed according to the shape of the contact ring 54 to ensure that the contact ring 54 is firmly embedded, the grounding spring pad 514 is evenly distributed to improve the welding strength, the contact cantilever 542 responds flexibly, and the signal contact area 73 is continuously and stably connected, further optimizing the grounding performance and enhancing the overall safety and reliability of the charging gun.

[0058] Optionally, the substrate 51 is further provided with a plurality of resistance bonding pads 515, on which coded resistors 55 are soldered.

[0059] Therefore, the encoding resistor 55 is connected in series with the signal spring pad 511 on the substrate 51 to form a specific encoding circuit, which facilitates the identification and management of different signal cables 4, avoids misconnection, improves the intelligence level of the system, ensures precise control of the charging process, and further enhances the overall safety and reliability.

[0060] Optionally, a plurality of signal spring pads 511 are located on the upper half of the side of the substrate 51 near the charging gun head housing 1; a plurality of connector pads 512 are located on the upper half of the side of the substrate 51 near the charging gun handle housing 2; grounding spring cavity 513 and a plurality of grounding spring pads 514 are located on the lower half of the side of the substrate 51 near the charging gun handle housing 2; and a plurality of resistance solder pads 515 are located on the middle of the side of the substrate 51 near the charging gun handle housing 2.

[0061] Therefore, the functional areas on the substrate 51 are rationally arranged to optimize space utilization. The shape, number and position of the contact springs 52 are designed according to each signal terminal 3, the shape, number and position of the board-end signal connectors 53 are designed according to each line-end signal connector 41, the shape, number and position of the contact rings 54 are designed according to the grounding terminal 7, and the shape, number and position of the resistance soldering pads 515 are designed according to the coding resistors 55. This ensures that the components work together and improves the overall structural compactness and functionality.

[0062] Optionally, a charging cable 8 is also inserted into the charging gun handle housing 2, a charging socket 12 is provided on the charging gun head housing 1, a mounting base 9 is provided in the mounting cavity, and a power terminal 10 is provided on the mounting base 9. The charging cable 8 is connected to the mounting base 9 and is connected to the power terminal 10, and the power terminal 10 extends into the charging socket 12.

[0063] Thus, the charging cable 8 is tightly connected to the power terminal 10, ensuring efficient and stable current transmission and meeting the needs of high-power charging.

[0064] Furthermore, the mounting base 9 is provided with connecting screws that are fixed to the charging gun head housing 1, and the base plate 51 is sandwiched between the mounting base 9 and the charging gun head housing 1.

[0065] Therefore, by fixing the base plate 51 with the mounting base 9 and connecting screws, the structure is ensured to be stable, the signal adapter board assembly 5 is prevented from loosening, and the position of each docking point is ensured to be accurate.

[0066] Furthermore, a positioning protrusion 13 is provided on the surface of the charging gun head housing 1 that abuts against the substrate 51, and a positioning hole 516 is provided on the substrate 51 corresponding to the positioning protrusion 13.

[0067] Thus, the positioning hole 516 and the positioning protrusion 13 are precisely matched to ensure that the mounting position of the substrate 51 is fixed, avoid misalignment, improve assembly accuracy, and further ensure the stability of the position of the signal adapter board assembly 5.

[0068] Furthermore, a clearance opening 517 is provided on the substrate 51 corresponding to the power terminal 10. Thus, the clearance opening 517 precisely matches the shape of the power terminal 10, avoiding installation interference and ensuring the insulation performance between the substrate 51 and the power terminal 10, thereby improving the overall electrical safety.

[0069] Detailed installation process:

[0070] 1) Solder the spring soldering pins 521 of each contact spring 52 to the signal spring solder pad 511 of the substrate 51, pass the contact ring 54 through the ground spring cavity 513 of the substrate 51, and then solder the ground soldering pins 541 to the ground spring solder pad 514 of the substrate 51, solder the coding resistors 55 to the resistor solder pad 515 of the substrate 51, and solder the connector soldering pins 531 of each board-end signal connector 53 to the connector solder pad 512 of the substrate 51, thereby forming a complete signal adapter board assembly 5.

[0071] 2) Pass the charging cable 8, signal cable 4 and grounding cable 6 through the charging gun handle housing 2 respectively, then install the multiple signal cables 4 into the line end signal connector 41, install the charging cable 8 into the mounting base 9, and install the grounding cable 6 into the riveting cavity 72 of the grounding terminal 7.

[0072] 3) Install each signal terminal 3, power terminal 10 and ground terminal 7 into the corresponding sockets of the charging gun head housing 1, and then install the signal adapter board assembly 5 so that the spring cantilever 522 of the contact spring 52 is placed in the protective cavity 31 and forms elastic contact with the terminal contact area 32. Then insert the wire end signal connector 41 into the connector coupling cavity 532 of the board end signal connector 53.

[0073] 4) Combine the charging gun head housing 1 and the charging gun handle housing 2 into one unit.

[0074] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A signal connection structure of a charging gun for an electric vehicle, characterized by comprising: The charging gun head shell (1), the charging gun handle shell (2), the signal terminal (3), the signal cable (4) and the signal adapter plate assembly (5) are combined to form a charging gun shell, and the inside of the charging gun shell forms a mounting cavity. A plurality of signal terminals (3) are installed on the charging gun head shell (1), and a protection cavity (31) is arranged on the signal terminal (3), and a terminal contact area (32) is arranged in the protection cavity (31). A plurality of signal cables (4) pass through the charging gun handle shell (2), and the end of the signal cable (4) is provided with a wire end signal connector (41). The signal adapter plate assembly (5) is arranged in the mounting cavity, and the signal adapter plate assembly (5) comprises a substrate (51), the substrate (51) is provided with a contact spring (52) corresponding to each signal terminal (3) and a plate end signal connector (53) corresponding to each signal cable (4), the contact spring (52) is in contact with the terminal contact area (32) in the protection cavity (31), and the plate end signal connector (53) is coupled with the wire end signal connector (41). The substrate (51) is provided with a printed circuit, and the substrate (51) is provided with a signal spring pad (511) corresponding to each contact spring (52), the contact spring (52) is provided with a spring welding pin (521) and a spring cantilever (522), the spring welding pin (521) is welded with the signal spring pad (511), and the spring cantilever (522) is in elastic contact with the terminal contact area (32).

2. The signal connection structure of a charging gun for an electric vehicle according to claim 1, characterized by The substrate (51) is provided with a connector pad (512) corresponding to each plate end signal connector (53), the plate end signal connector (53) is provided with a connector welding pin (531) and a connector coupling cavity (532), the connector welding pin (531) is welded with the connector pad (512), and the connector coupling cavity (532) is matched with the wire end signal connector (41). The charging gun handle shell (2) is also provided with a grounding cable (6), the charging gun head shell (1) is provided with a grounding jack (11), the mounting cavity is provided with a grounding terminal (7), the substrate (51) is provided with a contact ring (54), the head end of the grounding terminal (7) is a coupling contact area (71) inserted into the grounding jack (11), the tail end of the grounding terminal (7) is provided with a rivet cavity (72) fixed with the grounding cable (6), and the middle part of the grounding terminal (7) is a signal contact area (73) in contact with the contact ring (54).

3. The signal connection structure of a charging gun for an electric vehicle according to claim 2, characterized by ​ 4. The signal connection structure of a charging gun for an electric vehicle according to claim 3, characterized by The substrate (51) is provided with a ground spring cavity (513) for mounting the contact ring (54), and a plurality of ground spring pads (514) are arranged on the substrate (51) outside the ground spring cavity (513), the contact ring (54) is provided with a ground welding pin (541) and a contact cantilever (542), the ground welding pin (541) is welded with the ground spring pad (514), and the contact cantilever (542) is in elastic contact with the signal contact area (73).

5. The signal connection structure of a charging gun for an electric vehicle according to claim 4, characterized by The substrate (51) is further provided with a plurality of resistance welding pads (515), and the resistance welding pads (515) are welded with coding resistors (55).

6. The signal connection structure of a charging gun for an electric vehicle according to claim 5, characterized by A plurality of signal spring pads (511) are arranged on the substrate (51) near the upper half of one side of the charging gun head shell (1); A plurality of connector pads (512) are arranged on the substrate (51) near the upper half of one side of the charging gun handle shell (2); The ground spring cavity (513) and a plurality of ground spring pads (514) are arranged on the substrate (51) near the lower half of one side of the charging gun handle shell (2); A plurality of resistance welding pads (515) are arranged on the substrate (51) near the middle of one side of the charging gun handle shell (2).

7. The signal connection structure of a charging gun for an electric vehicle according to claim 1, characterized by The charging cable (8) is also inserted into the charging gun handle shell (2), the charging gun head shell (1) is provided with a charging jack (12), the mounting cavity is provided with a mounting seat (9), the mounting seat (9) is provided with a power terminal (10), the charging cable (8) is connected to the mounting seat (9) and the power terminal (10) is in conduction, and the power terminal (10) extends into the charging jack (12).

8. The signal connection structure of a charging gun for an electric vehicle according to claim 7, characterized by The mounting seat (9) is provided with a connecting screw fixed with the charging gun head shell (1), and the substrate (51) is clamped between the mounting seat (9) and the charging gun head shell (1).

9. The signal connection structure of a charging gun for an electric vehicle according to claim 8, characterized by The charging gun head shell (1) is provided with a positioning convex column (13) on the surface abutting against the substrate (51), and the substrate (51) is provided with a positioning hole (516) corresponding to the positioning convex column (13).

10. The signal connection structure of a charging gun for an electric vehicle according to claim 7, characterized by The substrate (51) is provided with an avoidance opening (517) corresponding to the power terminal (10).

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