High-voltage connecting piece for high-low voltage coupling measurement of high-voltage line of new energy automobile

Abstract

The utility model relates to a high-voltage connecting piece for high-low voltage coupling measurement of a high-voltage line of a new energy automobile. The high-voltage connecting piece comprises an N-head wallboard connector and a coaxial locking kit connected with the N-head wallboard connector, the N-head wallboard connector comprises an installation wallboard, the center of one side of the installation wallboard is provided with a conical pin, and the center of the other side of the installation wallboard is provided with an N-head core wire joint. An N-head core wire jack is formed in the center of the end part of the N-head core wire joint; the coaxial locking kit is composed of an upper pressing block and a lower pressing block, the bottom of the upper pressing block is provided with a wire harness pressing groove, the top of the lower pressing block is provided with a wire harness clamping groove, the wire harness pressing groove and the wire harness clamping groove form a high-voltage wire harness clamping hole, and the conical contact pin is located in the high-voltage wire harness clamping hole and is coaxial with the high-voltage wire harness clamping hole. The high-voltage connecting piece for high-voltage and low-voltage coupling measurement of the new energy automobile high-voltage wire adopts a coaxial pressing design, has good impedance transition and shielding layer connection, remarkably improves the accuracy of test data, and can be adapted to connection of the new energy automobile high-voltage wires with various sizes and coaxial cables.

Description

Technical Field

[0001] This utility model relates to a high-low voltage coupling attenuation measurement connection device, and more particularly to a high voltage connector for measuring high-low voltage coupling of high voltage lines in new energy vehicles. Background Technology

[0002] With the development and popularization of new energy vehicles, their market share is increasing. Correspondingly, as the use of high-voltage components in new energy vehicles grows, the electromagnetic environment within these vehicles becomes more complex. Due to the high voltage and high current characteristics of high-voltage systems, the intensity of radiated interference fields varies accordingly. This radiated interference field strength affects other components in the new energy vehicle. Furthermore, high-voltage components generate significant transient electromagnetic pulses during high-to-low voltage switching, and interference can easily couple from the high-voltage system to the conventional low-voltage system, causing severe interference to sensitive components in the low-voltage system and resulting in electromagnetic compatibility (EMC) problems. How to prevent interference and crosstalk between high-voltage and low-voltage components in advance is a crucial issue in the research and development of new energy vehicles. Currently, the method for predicting the existence of interference between high and low voltage in new energy vehicles is the use of high-to-low voltage coupling testing methods.

[0003] The S-parameter network analyzer method is a commonly used method for high-low voltage coupling testing. The two ends of the device under test are connected to two coaxial measurement cables on the network analyzer via a high-voltage adapter and a low-voltage adapter, each with an N-pin connector. When used for high-low voltage coupling testing of high-voltage components in new energy vehicles, the pins of the N-pin connector on the high-voltage adapter are connected to the high-voltage line of the new energy vehicle by soldering. This results in poor coaxiality between the high-voltage line of the new energy vehicle and the coaxial measurement cable, affecting the reflection of the input signal of the vector network analyzer, leading to low measurement accuracy and poor stability. Furthermore, this type of high-voltage adapter has low versatility, and the connection between the N-pin connector and the high-voltage line of the new energy vehicle is inconvenient and lacks versatility. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles, thereby solving the problem of connecting coaxial cables with high-voltage lines used in new energy vehicles.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A high-voltage connector for measuring high-low voltage coupling in high-voltage lines of new energy vehicles includes an N-head plate connector and a coaxial locking assembly fixedly connected to the N-head plate connector. The N-head plate connector includes a mounting plate fixedly disposed at one end of the coaxial locking assembly. A tapered pin is disposed at the center of one side of the mounting plate corresponding to the center of the coaxial locking assembly, and an N-head core wire connector is disposed at the center of the other side. An N-head core wire insertion hole is disposed at the center of the end of the N-head core wire connector. One end of the tapered pin corresponding to the N-head core wire connector extends through the mounting plate into the N-head core wire insertion hole. The coaxial locking assembly... The kit consists of a detachable upper pressure block and a lower pressure block, which are stacked together. The bottom center of the upper pressure block has a wire harness clamping groove that connects front and back, and the top center of the lower pressure block has a wire harness clamping groove that connects front and back. The wire harness clamping groove and the wire harness clamping groove are symmetrical. The end faces of both the wire harness clamping groove and the wire harness clamping groove are semi-circular. The combined upper and lower wire harness clamping groove and the wire harness clamping groove form a high-voltage wire harness clamping hole with a circular end face. The part of the tapered pin corresponding to one end of the coaxial locking kit is located inside the high-voltage wire harness clamping hole and is coaxial with the high-voltage wire harness clamping hole.

[0007] Furthermore, the N-head core wire connector is provided with an external thread for easy connection to a coaxial measuring cable.

[0008] Furthermore, the mounting wall panel has a rectangular structure, with a fixed connection hole that connects the front and back at each of its four corners; one end of the coaxial locking kit has four threaded mounting holes, which correspond to the four fixed connection holes on the mounting wall panel. Two of the threaded mounting holes are located on the upper pressure block, and the other two are located on the lower pressure block. The mounting wall panel and the coaxial locking kit are fixedly connected together by screws passing through the fixed connection holes and the threaded mounting holes.

[0009] Furthermore, the upper pressure block is provided with countersunk threaded holes that are connected vertically at the top, and the lower pressure block is provided with threaded connection holes that are provided vertically and vertically in number and position corresponding to the countersunk threaded holes. The upper pressure block and the lower pressure block are fixedly connected together by bolts passing through the vertically and vertically corresponding countersunk threaded holes and threaded connection holes.

[0010] Furthermore, the coaxial locking assembly is made of brass and has a three-dimensional rectangular structure; the coaxial locking assembly is 30mm long, 36mm wide, and 26mm high.

[0011] Furthermore, the diameter of the high-voltage harness clamp hole is 4–20 mm.

[0012] Furthermore, the high-voltage harness clamping hole is a straight hole of a single size.

[0013] Furthermore, the high-voltage harness clamping hole is composed of a large hole and a small hole connected from front to back, forming a stepped shape.

[0014] Compared with the prior art, the advantages of this utility model are: this high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles adopts a coaxial clamping design, which is simple in structure, and facilitates the connection and disassembly between the coaxial cable for measurement and the high-voltage line of the new energy vehicle. It can ensure the coaxiality between the two, good impedance transition and shielding layer connection, significantly improve the accuracy of test data, and can be adapted to the connection of high-voltage lines and coaxial cables of various sizes in new energy vehicles. It is flexible in use and ensures the reliability of test data. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the disassembled structure of a high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to this utility model.

[0017] Figure 2 This is a schematic diagram of the bottom structure of a high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to this utility model.

[0018] Figure 3 yes Figure 2 Structural cross-sectional view of AA;

[0019] Figure 4 This is a schematic diagram of the N-head wall plate connector structure in a high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to this utility model.

[0020] Figure 5 This is a schematic diagram of the disassembled structure of the coaxial locking kit in embodiment 1 of the high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to this utility model;

[0021] Figure 6 This is a schematic diagram of the disassembled structure of the coaxial locking kit in embodiment 2 of the high-voltage connector for high-voltage coupling measurement of high-voltage lines in new energy vehicles according to this utility model;

[0022] Figure 7 This is a schematic diagram of the disassembled structure of the coaxial locking kit in embodiment 3 of the high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to this utility model.

[0023] In the diagram: 1. N-head wall panel connector; 11. Mounting wall panel; 111. Fixed connection hole; 12. N-head core wire connector; 121. N-head core wire insertion hole; 13. Tapered pin; 2. Coaxial locking kit; 21. Upper pressure block; 211. Countersunk threaded hole; 212. Wire harness clamping groove; 22. Lower pressure block; 221. Wire harness clamping groove; 222. Threaded connection hole; 23. Bolt; 24. Threaded mounting hole; 25. Screw. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships commonly used when the product of the present invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and 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 the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] Furthermore, the use of terms such as "horizontal" or "vertical" does not imply that the component must be absolutely horizontal or vertical, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure or component must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0028] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0029] Example

[0030] Please refer to the instruction manual attached. Figures 1 to 3 As shown, the instruction manual is attached. Figures 1 to 3 The diagram shows a high-voltage connector for measuring high-low voltage coupling of high-voltage lines in new energy vehicles, according to this utility model. This high-voltage connector includes an N-head wall plate connector 1 and a coaxial locking kit 2 fixedly connected to the N-head wall plate connector 1. The N-head wall plate connector 1 is used to connect the coaxial measurement cable on the network analyzer and the high-voltage line of the new energy vehicle. (See attached specification). Figure 3 and 4As shown, the N-head wall panel connector 1 includes a mounting wall panel 11, which is rectangular in shape and fixedly mounted on one end of the coaxial locking kit 2. To facilitate flexible assembly and disassembly between the N-head wall panel connector 1 and the coaxial locking kit 2, a front-to-back connecting hole 111 is provided at each of the four corners of the mounting wall panel 11. Correspondingly, one end of the coaxial locking kit 2 is provided with four threaded mounting holes 24, which correspond to the four connecting holes 111 on the mounting wall panel 11. The mounting wall panel 11 and the coaxial locking kit 2 are fixedly connected together by screws 25 passing through the connecting holes 111 and the threaded mounting holes 24. The mounting plate 11 and the coaxial locking kit 2 are fixedly connected by screws 25, which facilitates the connection and disassembly between the N-type connector 1 and the coaxial locking kit 2, making it more flexible to use. A tapered pin 13 is provided at the center of one side of the mounting plate 11 corresponding to the coaxial locking kit 2, and an N-type core wire connector 12 is provided at the center of the other side. To facilitate the connection of the coaxial measurement cable port on the network analyzer, the N-type core wire connector 12 has an external screw for easy connection of the coaxial measurement cable, and an N-type core wire insertion hole 121 is provided at the center of its end. The port of the coaxial measurement cable is screwed onto the N-type core wire connector 12 and partially inserted into the N-type core wire insertion hole 121. To facilitate coaxial... The coaxial connection between the measuring cable and the high-voltage line of the new energy vehicle under test is achieved by a horizontally positioned tapered pin 13. One end of the tapered pin 13, corresponding to the N-head core wire connector 12, extends through the mounting plate 11 into the N-head core wire insertion hole 121. Both ends of the tapered pin 13 are inserted into the conductive cores at the center of the coaxial measuring cable and the center of the high-voltage line of the new energy vehicle, ensuring signal reflection. The coaxial locking kit 2 is made of brass and has a three-dimensional rectangular structure with a length of 30mm, a width of 36mm, and a height of 26mm, ensuring a good electrical connection between the center of the coaxial measuring cable and the high-voltage line of the new energy vehicle. This design facilitates connection to the high-voltage line of the new energy vehicle and ensures reliable connection. For flexibility of use, the coaxial locking kit 2 consists of a detachable upper pressure block 21 and a lower pressure block 22, which are stacked together. Two of the four threaded mounting holes 24 are located on the upper pressure block 21, and the other two are located on the lower pressure block 22. After the upper pressure block 21 and the lower pressure block 22 are stacked together, the positions of the four threaded mounting holes 24 correspond to the positions of the fixing connection holes 111 on the mounting plate 11. The N-head plate connector 1 is fixedly connected to the coaxial locking kit 2 by screws 25. For convenient connection and disassembly of the upper pressure block 21 and the lower pressure block 22, please refer to the appendix of the instruction manual. Figures 5 to 7As shown, the upper pressure block 21 has four countersunk threaded holes 211 at its top, which are respectively located at the four corners of the top of the upper pressure block 21. The lower pressure block 22 has threaded connection holes 222 at its top, which correspond in number and position to the countersunk threaded holes 211. The upper pressure block 21 and the lower pressure block 22 are fixedly connected together by bolts 23 passing through the corresponding countersunk threaded holes 211 and threaded connection holes 222, making disassembly and assembly convenient. To facilitate the clamping of the high-voltage wire of the new energy vehicle, the bottom center of the upper pressure block 21 has a wire harness clamping groove 212 that connects front and back, and the top center of the lower pressure block 21 has a wire harness clamping groove 221 that connects front and back. The end faces of the wire harness clamping groove 212 and the wire harness clamping groove 221 are both semi-circular. The end of the high-voltage wire of the new energy vehicle is placed in the wire harness clamping groove 221. The wire harness is clamped and limited within the coaxial locking assembly 21 by the wire harness clamping groove 212. It should be noted that the wire harness clamping groove 212 at the bottom of the upper pressure block 21 and the wire harness clamping groove 221 at the top of the lower pressure block 22 in a set of coaxial locking kits 2 are symmetrical. The combined wire harness clamping groove 212 and wire harness clamping groove 221 form a high-voltage wire harness clamping hole with a circular end face. The diameter of the high-voltage wire harness clamping hole is 4 to 20 mm, which corresponds to the diameter range of the high-voltage wire of the new energy vehicle. Furthermore, the part of the tapered pin 13 corresponding to one end of the coaxial locking assembly 2 is located inside the high-voltage wire harness clamping hole and is coaxial with the high-voltage wire harness clamping hole. The tapered pin 13 and the N-head core wire insertion hole 121 are also coaxial, thereby ensuring the coaxiality of the coaxial measuring cable and the high-voltage wire of the new energy vehicle to be tested after connection, and thus ensuring the accuracy of the measurement.

[0031] To accommodate high-voltage cables of different diameters used in new energy vehicles, the coaxial locking kit 2 can be designed with corresponding sizes to accommodate high-voltage cables of different diameters. (See attached instruction manual.) Figures 5 to 7 This refers to three different coaxial locking kit implementation schemes with varying high-voltage harness clamp hole diameters; for details, please refer to the attached instruction manual. Figure 5 As shown, the instruction manual is attached. Figure 5 As in Embodiment 1, the wire harness clamping groove 212 at the bottom of the upper pressure block 21 and the wire harness clamping groove 221 at the top of the lower pressure block 22 are straight holes that are connected front and back. Correspondingly, the high-voltage wire harness clamping hole formed by the upper pressure block 21 and the lower pressure block 22 is a straight hole of a single size. The diameter of the straight hole is a size that matches any diameter of the high-voltage wire in new energy vehicles. A set of coaxial locking kits 2 corresponding to the size of each diameter of the high-voltage wire in new energy vehicles can be designed. During testing, the coaxial locking kit 2 corresponding to the diameter of the high-voltage wire in new energy vehicles can be selected for use, which is flexible and convenient to operate.

[0032] Examples 2 and 3 are two composite types of high-voltage harness clamping holes; please refer to the appendix of the instruction manual. Figure 6 and7 As shown, the high-voltage harness clamping holes in both embodiments are composed of two high-voltage harness clamping holes of different diameters. The large hole and the small hole are connected front and back and are in a stepped shape. The high-voltage harness clamping hole with the larger diameter is coaxial with the high-voltage harness clamping hole with the smaller diameter. It should be noted that the N-head wall plate connector 1 installed on the coaxial locking kit 2 corresponds to one end of the high-voltage harness clamping hole with the larger diameter, which can be adapted to more high-voltage wires of new energy vehicles.

[0033] In use, first, fix the N-head wall panel connector 1 to the lower pressure block 22 with screws 25. Then, pass the connection end of the new energy vehicle high-voltage wire through the wire harness clamping groove 221 and insert it together with the tapered pin 13. Next, combine the upper pressure block 21 and the lower pressure block 22 together and fix them together with bolts 23. The new energy vehicle high-voltage wire in the wire harness clamping groove 221 is clamped by the wire harness clamping groove 212 to ensure the coaxiality of the tapered pin 13 and the new energy vehicle high-voltage wire connection. Then, screw the measuring coaxial cable connector on the network analyzer onto the N-core wire connector 12. The center of the end of the measuring coaxial cable is inserted together with the tapered pin 13 to achieve the coaxial connection between the measuring coaxial cable and the new energy vehicle high-voltage wire, ensuring the detection accuracy.

[0034] This high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles adopts a coaxial clamping design, which is simple in structure. It is convenient to connect and disassemble the coaxial cable used for measurement to the high-voltage line of the new energy vehicle. It can ensure the coaxiality between the two, good impedance transition and shielding layer connection, which significantly improves the accuracy of test data. It can be adapted to the connection of high-voltage lines and coaxial cables of various sizes in new energy vehicles, making it flexible in use and ensuring the reliability of test data.

[0035] It should be emphasized that the above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-voltage connector for measuring high-low voltage coupling in high-voltage lines of new energy vehicles, characterized in that: The device includes an N-head wall panel connector (1) and a coaxial locking kit (2) fixedly connected to the N-head wall panel connector (1); the N-head wall panel connector (1) includes a mounting plate (11), which is fixedly disposed at one end of the coaxial locking kit (2), with a tapered pin (13) at the center of one side of the coaxial locking kit (2) and an N-head core wire connector (12) at the center of the other side; the N-head core wire connector (12) has an N-head core wire insertion hole (121) at the center of its end, and one end of the tapered pin (13) corresponding to the N-head core wire connector (12) extends through the mounting plate (11) into the N-head core wire insertion hole (121); the coaxial locking kit (2) consists of a detachable upper pressure block (21) and a lower... The pressure block (22) is composed of an upper pressure block (21) and a lower pressure block (22) stacked together. The bottom center of the upper pressure block (21) is provided with a wire harness clamping groove (212) that is connected from front to back, and the top center of the lower pressure block (22) is provided with a wire harness clamping groove (221) that is connected from front to back. The wire harness clamping groove (212) and the wire harness clamping groove (221) are symmetrical from top to bottom. The end faces of the wire harness clamping groove (212) and the wire harness clamping groove (221) are both semi-circular. The upper and lower combined wire harness clamping groove (212) and the wire harness clamping groove (221) form a high-voltage wire harness clamping hole with a circular end face. The part of the tapered pin (13) corresponding to one end of the coaxial locking kit (2) is located in the high-voltage wire harness clamping hole and is coaxial with the high-voltage wire harness clamping hole.

2. The high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The N-head core wire connector (12) is provided with an external thread for easy connection of a coaxial measuring cable.

3. A high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The mounting wall panel (11) has a rectangular structure, and each of its four corners is provided with a front-to-back connecting hole (111); one end of the coaxial locking kit (2) is provided with four threaded mounting holes (24), which correspond to the four connecting holes (111) on the mounting wall panel (11). Two of the threaded mounting holes (24) are located on the upper pressure block (21), and the other two are located on the lower pressure block (22). The mounting wall panel (11) and the coaxial locking kit (2) are fixedly connected together by screws (25) passing through the connecting holes (111) and the threaded mounting holes (24).

4. A high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The upper pressure block (21) is provided with countersunk threaded holes (211) that are connected vertically on the top, and the lower pressure block (22) is provided with threaded connection holes (222) that are corresponding in number and position to the countersunk threaded holes (211) on the top. The upper pressure block (21) and the lower pressure block (22) are fixedly connected together by bolts (23) passing through the corresponding countersunk threaded holes (211) and threaded connection holes (222).

5. A high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The coaxial locking kit (2) is made of brass and has a three-dimensional rectangular structure; the coaxial locking kit (2) is 30mm long, 36mm wide and 26mm high.

6. A high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The diameter of the high-voltage harness clamp hole is 4–20 mm.

7. A high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The high-voltage harness clamp hole is a straight hole of a single size.

8. A high-voltage connector for high-low voltage coupling measurement of high-voltage lines in new energy vehicles according to claim 1, characterized in that: The high-voltage harness clamping hole consists of a large hole and a small hole connected from front to back, forming a stepped shape.

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