High-voltage connector for electric automobile

Abstract

The utility model relates to the technical field of connectors, and discloses a high-voltage connector for an electric automobile, which comprises a socket assembly, a plug assembly and a wire harness assembly, and the socket assembly and the wire harness assembly are detachably connected to two adjacent end surfaces of the plug assembly respectively. Wherein the socket assembly is provided with a positioning column, the plug assembly is provided with a guide groove for the positioning column to slide in a guiding mode, elastic retaining rings are arranged on the two opposite sides of the wiring harness assembly, the plug assembly is provided with locking protrusions clamped with the elastic retaining rings, and accurate alignment of the socket assembly and the plug assembly can be achieved through the structure of the positioning column and the guide groove; the connection process is simplified, the operation difficulty caused by dislocation is avoided, and the connection operability is remarkably improved; the elastic retaining ring is connected with the locking protrusion in a buckled mode, the firmness of the plug assembly and the wire harness assembly after connection is ensured, connection looseness is effectively prevented, meanwhile, the guiding inclined plane portion on the locking protrusion can provide a guiding effect during insertion, and the smoothness and stability of connection are further improved.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and more specifically to a high-voltage connector for electric vehicles. Background Technology

[0002] The rapid development of the new energy vehicle industry has made the design and integration of high-voltage electrical systems one of the core technological challenges. High-voltage connectors, in particular, play a crucial role in the power distribution system of electric vehicles. These connectors not only need to withstand high currents but also ensure reliable connections and sufficient insulation to prevent electrical faults. In practical applications, the connection between the OBC (On-Board Charger) and the vehicle's high-voltage distribution box is critical, directly impacting the charging efficiency and safety of electric vehicles. However, due to space constraints and industrial design challenges, traditional connector solutions often fail to meet the compact and efficient design requirements of modern electric vehicles.

[0003] Currently, in the connection application of high-voltage distribution boxes in new energy vehicles, the commonly used high-voltage connectors have problems such as excessive size or insufficient current adaptability, which limits their functionality in space-constrained application scenarios. The above connectors are usually equipped with signal terminals, making the high-voltage connector complex and bulky. Moreover, in the connection between the OBC and the distribution box, the lack of a convenient assembly structure often leads to poor operability and low efficiency during connection.

[0004] Therefore, there is a need to provide a high-voltage connector for electric vehicles to solve the problem of poor operability during connection caused by the lack of convenient assembly structure of the aforementioned high-voltage connectors. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage connector for electric vehicles to solve the technical problems mentioned in the background art.

[0006] The present invention adopts the following technical solution:

[0007] A high-voltage connector for electric vehicles includes: a socket assembly, a plug assembly, and a wiring harness assembly, wherein the socket assembly and the wiring harness assembly are detachably connected to adjacent end faces of the plug assembly.

[0008] The socket assembly is provided with a positioning post, the plug assembly has a guide groove for guiding the positioning post to slide, the wire harness assembly has elastic buckles on opposite sides, the plug assembly has a locking protrusion that engages with the elastic buckles, and the locking protrusion has a guide bevel extending away from the plug assembly.

[0009] Furthermore, the socket assembly includes a socket housing, with positioning posts provided on opposite sides of the socket housing, a plug end provided at the end of the socket housing facing the plug assembly, a socket shielding cover fitted over the plug end, and a socket terminal connected to the end of the plug end away from the socket assembly.

[0010] Furthermore, a terminal seal is provided at the end of the socket terminal away from the plug-in end, and a terminal fixing member is abutted at the end of the socket terminal away from the plug-in end, and the terminal fixing member is fixedly connected to the socket housing.

[0011] Furthermore, a mounting portion extends around the periphery of the socket housing, the mounting portion having a plurality of threaded holes, and a first sealing groove and a second sealing groove being provided at the end of the mounting portion facing away from the plug assembly, the first sealing groove and the second sealing groove being filled with a first sealing ring and a second sealing ring, respectively.

[0012] Furthermore, the plug assembly includes a plug housing, the plug housing having a first slot for accommodating the plug end, guide grooves being provided on opposite sides of the plug housing, an assist device being rotatably connected to the side of the guide groove away from the terminal fixing member, and the end of the assist device away from the plug housing being fixedly connected to the plug housing by a locking member.

[0013] Furthermore, the plug housing is also provided with a fixing groove for the socket housing to be inserted into, a mating seal is installed in the fixing groove, and a sealing cap is also provided on the side of the fixing groove away from the booster to press the mating seal.

[0014] Furthermore, the wiring harness assembly includes a plug terminal, with a cable connected to one end of the plug terminal away from the plug housing. An insulating element is sleeved around the plug terminal, and a plug shield is sleeved on the insulating element. The plug shield is inserted into the plug housing, and the plug housing is provided with a second slot corresponding to the plug shield.

[0015] Furthermore, the plug shield has outwardly extending elastic clips on opposite sides, and the plug housing has a wire harness fixing groove corresponding to the elastic clips, so as to fix the wire harness assembly to the plug assembly.

[0016] Furthermore, the cable is fitted with a tail cap, which is fixedly connected to the cable, and the tail cap is provided with an elastic buckle, which abuts against the plug housing to fix the wire harness assembly to the plug assembly.

[0017] Furthermore, the end of the tail cap near the plug terminal is provided with a wire clamp, a sealing body, a sealing baffle, and a shielding sleeve in sequence, and the wire clamp, the sealing body, the sealing baffle, and the shielding sleeve are all sleeved on the outside of the cable.

[0018] Beneficial effects:

[0019] This utility model provides a high-voltage connector for electric vehicles. The socket assembly and the wiring harness assembly are detachably connected to adjacent end faces perpendicular to each other of the plug assembly. Through the structure of the positioning post and the guide groove, the socket assembly and the plug assembly can be accurately aligned, simplifying the connection process, avoiding operational difficulties caused by misalignment, and significantly improving the operability of the connection. The snap-fit ​​connection between the elastic buckle and the locking protrusion ensures the firmness of the plug assembly and the wiring harness assembly after connection, effectively preventing the connection from loosening. At the same time, the guide bevel on the locking protrusion can provide a guiding effect during insertion, further improving the smoothness and stability of the connection, making this high-voltage connector suitable for applications with limited space inside the vehicle. Attached Figure Description

[0020] Figure 1 This is an exploded view of the overall structure of a high-voltage connector for electric vehicles according to this utility model;

[0021] Figure 2 This is a cross-sectional view of the overall structure of a high-voltage connector for electric vehicles according to this utility model;

[0022] Figure 3 This is an exploded view of the socket assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the overall structure of the socket assembly of this utility model;

[0024] Figure 5 This is an exploded view of the plug assembly of this utility model;

[0025] Figure 6 This is a schematic diagram of the overall structure of the plug assembly of this utility model;

[0026] Figure 7 This is an exploded view of the wire harness assembly of this utility model;

[0027] Figure 8 This is a schematic diagram of the overall structure of the wire harness assembly of this utility model;

[0028] Figure 9 This is a schematic diagram of the plug assembly and wire harness assembly of this utility model.

[0029] in:

[0030] 100. Socket assembly; 101. Positioning post; 200. Plug assembly; 201. Guide groove; 202. Locking protrusion; 300. Wiring harness assembly; 301. Flexible retaining ring;

[0031] 1. Socket housing; 2. Socket shielding cover; 3. Socket terminals; 4. Terminal seal; 5. Terminal fixing component; 6. First sealing ring; 7. Second sealing ring;

[0032] 8. Plug housing; 9. Booster; 10. Locking element; 11. Interlocking seal; 12. Sealing gland;

[0033] 13. Plug terminal; 14. Cable; 15. Insulator; 16. Plug shield; 17. Tail cap; 18. Wire clamp; 19. Wire seal; 20. Sealing baffle; 21. Shielding sleeve.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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 according to the specific circumstances.

[0038] 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.

[0039] Reference Figures 1 to 9 This utility model proposes a high-voltage connector for electric vehicles, including: a socket assembly 100, a plug assembly 200 and a wiring harness assembly 300, wherein the socket assembly 100 and the wiring harness assembly 300 are respectively detachably connected to the adjacent two end faces of the plug assembly 200;

[0040] The socket assembly 100 is provided with a positioning post 101, the plug assembly 200 is provided with a guide groove 201 for guiding the positioning post 101 to slide, the wire harness assembly 300 is provided with elastic retaining rings 301 on opposite sides, the plug assembly 200 is provided with a locking protrusion 202 that is engaged with the elastic retaining rings 301, and the locking protrusion 202 is provided with a guide bevel extending in a direction away from the plug assembly 200.

[0041] In the above embodiment, in the socket assembly 100, the positioning post 101 is cylindrical to ensure that it can fit tightly with the guide groove 201 of the plug assembly 200, thereby achieving precise docking. The inner wall of the guide groove 201 adapts to the outer surface of the positioning post 101, ensuring that the guide groove 201 can guide the positioning post 101 to slide smoothly during the connection process.

[0042] The elastic retaining ring 301 of the wiring harness assembly 300 is made of a highly elastic material to provide sufficient elasticity when the plug assembly 200 is inserted, ensuring a secure locking effect with the locking protrusion 202. The inner side of the elastic retaining ring 301 is designed with a groove to match the outer shape of the locking protrusion 202, thereby achieving a stable lock.

[0043] The guide bevel of the locking protrusion 202 allows the elastic retaining ring 301 to smoothly slide across the guide bevel during insertion and ultimately lock into the main body of the locking protrusion 202. The angle of the guide bevel is optimized to ensure that the interaction between the elastic retaining ring 301 and the locking protrusion 202 is both smooth and reliable during insertion and removal.

[0044] In summary, the socket assembly 100 and the wiring harness assembly 300 are detachably connected to the adjacent perpendicular end faces of the plug assembly 200. Through the structure of the positioning post 101 and the guide groove 201, the socket assembly 100 and the plug assembly 200 can be precisely aligned, simplifying the connection process, avoiding operational difficulties caused by misalignment, and significantly improving the operability of the connection. The snap-fit ​​connection between the elastic retaining ring 301 and the locking protrusion 202 ensures the firmness of the plug assembly 200 and the wiring harness assembly 300 after connection, effectively preventing loosening. At the same time, the guide bevel on the locking protrusion 202 can provide guidance during insertion, further improving the smoothness and stability of the connection, making this high-voltage connector suitable for applications with limited space in vehicles.

[0045] refer to Figure 3 and Figure 4 In one embodiment, the socket assembly 100 includes a socket housing 1, with positioning posts 101 disposed on opposite sides of the socket housing 1. A plug-in terminal is disposed at the end of the socket housing 1 facing the plug assembly 200, and a socket shield 2 is fitted over the plug-in terminal. A socket terminal 3 is connected to the end of the plug-in terminal facing away from the socket assembly 100. The socket housing 1 is made of high-strength engineering plastic, possessing good insulation performance and mechanical strength, effectively protecting the internal electrical components from external environmental influences. The interior of the socket housing 1 has multiple conductive grooves, each containing a conductive strip. The conductive strip is connected to the socket terminal 3 to ensure smooth current transmission. The conductive strip is made of a high-conductivity copper alloy to reduce resistance loss during the connection process.

[0046] In one embodiment, a terminal seal 4 is fitted onto the end of the socket terminal 3 away from the plug-in end, and a terminal retainer 5 abuts against the end of the socket terminal 3 away from the plug-in end, and the terminal retainer 5 is fixedly connected to the socket housing 1. The terminal retainer 5 not only ensures the stable fixation of the socket terminal 3, but also further enhances the structural strength of the entire socket assembly 100 through its fixed connection with the socket housing 1. The terminal retainer 5 is made of metal to provide sufficient mechanical strength and durability, ensuring that it will not deform or be damaged during long-term use. To further improve the performance of the connector, the terminal seal 4 is made of elastic material, which can effectively prevent the intrusion of moisture and dust, ensuring that the connector can maintain good working condition even in harsh environments, and providing a good sealing effect after assembly.

[0047] In one embodiment, a mounting portion extends circumferentially around the socket housing 1. The mounting portion has several threaded holes. A first sealing groove and a second sealing groove are provided at the end of the mounting portion facing away from the plug assembly 200. A first sealing ring 6 and a second sealing ring 7 are respectively filled into the first sealing groove and the second sealing groove. Preferably, high-temperature and high-pressure resistant silicone rubber is used for the first sealing ring 6 and the second sealing ring 7 to ensure that the connector maintains a good sealing effect even in high-temperature or low-temperature environments during the operation of the electric vehicle.

[0048] refer to Figure 5 and Figure 6 In one embodiment, the plug assembly 200 includes a plug housing 8, which has a first slot for receiving the plug tip. Guide grooves 201 are provided on opposite sides of the plug housing 8. An assist device 9 is rotatably connected to the side of the guide groove 201 away from the terminal fixing member 5. The end of the assist device 9 away from the plug housing 8 is fixedly connected to the plug housing 8 via a locking member 10. The assist device 9 ensures that the plug tip can be smoothly inserted into or removed from the corresponding socket. The fixed connection between the locking member 10 and the plug housing 8 ensures that the assist device 9 remains stable during use and will not accidentally fall off or shift due to external forces.

[0049] In one embodiment, the plug housing 8 is further provided with a fixing groove for the socket housing 1 to be inserted into, and a mating seal 11 is installed in the fixing groove. A sealing cap 12 is also provided on the side of the fixing groove away from the booster 9 to press the mating seal 11.

[0050] The fixing groove matches the outer edge of the socket housing 1, ensuring precise alignment during insertion. To further improve the connector's sealing performance, a mating seal 11 is installed in the fixing groove, and several elastic sealing strips are also provided on the inner wall of the fixing groove. These elastic sealing strips are compressed when the socket housing 1 is inserted, thus forming an additional sealing layer between the socket housing 1 and the plug housing 8. Furthermore, to prevent aging or damage to the seals during use in harsh environments, both the mating seal 11 and the elastic sealing strips are made of materials with excellent aging resistance, such as fluororubber or EPDM rubber. The sealing cap 12 presses the mating seal 11 tightly. By providing multiple sealing structures in the plug housing 8 and the socket housing 1, and selecting high-performance materials, the reliability and safety of the high-voltage connector for electric vehicles are ensured under various operating conditions.

[0051] refer to Figure 7 and Figure 8 In one embodiment, the wiring harness assembly 300 includes a plug terminal 13. A cable 14 is connected to one end of the plug terminal 13 away from the plug housing 8. An insulating member 15 is sleeved around the plug terminal 13, and a plug shield 16 is fitted onto the insulating member 15. The plug shield 16 is inserted into the plug housing 8, and the plug housing 8 has a second slot corresponding to the plug shield 16. The plug terminal 13 is typically made of a copper alloy with excellent conductivity to ensure efficient and stable current transmission. The cable 14 is connected to the plug terminal 13 by crimping or welding to ensure it will not detach under harsh conditions such as vibration and impact. The plug shield 16 not only provides electromagnetic interference shielding but also considers heat dissipation and structural strength. The shield is connected to the plug housing 8 by a plug-in connection, ensuring effective shielding while facilitating assembly and disassembly. The second slot matches the plug shield 16, ensuring the shield is securely positioned within the plug housing 8 without hindering the insertion and removal of the plug terminal 13.

[0052] In one embodiment, the plug shield 16 has outwardly extending elastic clips on opposite sides, and the plug housing 8 has wire harness fixing grooves corresponding to the elastic clips, so that the wire harness assembly 300 is fixedly connected to the plug assembly 200. The elastic clips provide a certain elastic pressure when the plug shield 16 is inserted into the plug housing 8, thereby ensuring good contact and sealing between the shield and the plug housing 8, and also improving the overall vibration and impact resistance of the connector.

[0053] In one embodiment, the cable 14 is fitted with a tail cap 17, which is fixedly connected to the cable 14. The tail cap 17 is provided with an elastic retaining ring 301, which abuts against the plug housing 8 to fix the wire harness assembly 300 to the plug assembly 200. The tail cap 17 not only enhances the fixing effect between the cable 14 and the plug housing 8, but also provides additional protection to prevent the cable 14 from being damaged during use. The tail cap 17 is made of high-temperature resistant and wear-resistant materials to meet the usage requirements of electric vehicle high-voltage connectors in harsh environments. In addition, the elastic retaining ring 301 on the tail cap 17 makes the connector easier to disassemble and assemble, allowing users to easily connect or disconnect the wire harness assembly 300 from the plug assembly 200 without the need for additional tools.

[0054] In one embodiment, the end of the tail cap 17 near the plug terminal 13 is sequentially provided with a wire clamp 18, a sealing body 19, a sealing baffle 20, and a shielding sleeve 21, all of which are fitted over the outside of the cable 14. The wire clamp 18 securely fixes the cable 14 to the tail cap 17, preventing displacement when subjected to vibration or impact. The sealing body 19 wraps around the end of the cable 14, ensuring the internal conductor is isolated from the external environment and preventing moisture and impurities from entering, thereby improving the connector's insulation performance. The sealing baffle 20, located outside the sealing body 19, further enhances the sealing effect, preventing liquids and dust from entering the connector. The shielding sleeve 21 provides electromagnetic shielding for the cable 14, reducing electromagnetic interference on signal transmission and ensuring signal stability and reliability.

[0055] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A high voltage connector for an electric vehicle, characterized by The utility model relates to a socket assembly (100), plug assembly (200) and wire harness assembly (300), socket assembly (100) and wire harness assembly (300) are respectively detachable connection in the two end faces adjacent of plug assembly (200), Wherein, the socket assembly (100) is provided with the positioning column (101), the plug assembly (200) is opened with the guide slot (201) for the positioning column (101) guiding sliding, the wire harness assembly (300) opposite both sides are provided with the elastic buckle ring (301), the plug assembly (200) is provided with with the locking protrusion (202) of elastic buckle ring (301) clamping, the locking protrusion (202) is provided with the guide inclined surface portion along the direction of away from the plug assembly (200) extension. The socket assembly (100) includes a socket housing (1), the opposite sides of the socket housing (1) are provided with the positioning column (101), one end of the socket housing (1) towards the plug assembly (200) is provided with a plug-in end, the plug-in end is sleeved with a socket shield (2), one end of the plug-in end away from the socket assembly (100) is connected with a socket terminal (3).

2. The high voltage connector for electric vehicles according to claim 1, characterized in that, The end of the socket terminal (3) away from the plug-in end is sleeved with a terminal sealing element (4), the end of the socket terminal (3) away from the plug-in end is abutted with a terminal fixing element (5), and the terminal fixing element (5) is fixedly connected with the socket housing (1).

3. The high voltage connector for electric vehicles according to claim 2, characterized in that, The circumference of the socket housing (1) extends with a mounting portion, the mounting portion is provided with a plurality of threaded holes, one end of the mounting portion away from the plug assembly (200) is provided with a first sealing groove and a second sealing groove, the first sealing groove and the second sealing groove are respectively filled with a first sealing ring (6) and a second sealing ring (7).

4. The high voltage connector for electric vehicles according to claim 2, wherein The plug assembly (200) includes a plug housing (8), the plug housing (8) is provided with a first insertion slot for accommodating the plug-in end, the opposite sides of the plug housing (8) are provided with the guide slot (201), one side of the guide slot (201) away from the terminal fixing element (5) is rotatably connected with a booster (9), one end of the booster (9) away from the plug housing (8) is fixedly connected with the plug housing (8) through a locking element (10).

5. The high voltage connector for electric vehicles as claimed in claim 3, wherein, The plug housing (8) is also provided with a fixing groove for inserting the socket housing (1), the fixing groove is provided with a plug-in sealing element (11), and the side of the fixing groove away from the booster (9) is also provided with a sealing gland (12) to compress the plug-in sealing element (11).

6. The high voltage connector for electric vehicles according to claim 5, characterized in that, The wire harness assembly (300) includes a plug terminal (13), one end of the plug terminal (13) away from the plug housing (8) is connected with a cable (14), the plug terminal (13) is surrounded by an insulating element (15), the insulating element (15) is sleeved with a plug shield (16), the plug shield (16) is inserted into the plug housing (8), and the plug housing (8) is provided with a second insertion slot corresponding to the plug shield (16).

7. The high voltage connector for electric vehicles as claimed in claim 5 wherein, ​ 8. The high voltage connector for electric vehicles according to claim 7, characterized in that, The plug shielding cover (16) is provided with elastic clamping pieces extending outward on opposite sides, and the plug shell (8) is provided with wire harness fixing grooves corresponding to the elastic clamping pieces, so that the wire harness assembly (300) is fixedly connected with the plug assembly (200).

9. The high voltage connector for electric vehicles as claimed in claim 7, wherein, The cable (14) is sleeved with a tail cover (17), the tail cover (17) is fixedly connected with the cable (14), and the tail cover (17) is provided with the elastic clamping ring (301), the elastic clamping ring (301) abuts against the plug shell (8), so that the wire harness assembly (300) is fixedly connected with the plug assembly (200).

10. The high voltage connector for electric vehicles according to claim 9, characterized in that, The tail cover (17) is provided with a wire clamp (18), a wire sealing body (19), a sealing baffle (20) and a shielding pressing sleeve (21) in sequence at one end close to the plug terminal (13), and the wire clamp (18), the wire sealing body (19), the sealing baffle (20) and the shielding pressing sleeve (21) are all sleeved on the outside of the cable (14).

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