CABLE CONNECTOR MECHANISM, CABLE MECHANISM AND METHODS FOR CREATING CABLE MECHANISM

Abstract

The invention relates to a shielding mechanism, a cable mechanism, and a method for constructing a cable mechanism, relating to the field of cable engineering, and addressing the problem of incomplete cable shielding structures. The shielding mechanism of the invention is used to connect the first and second shield layers, and comprises: a conductive device whose first end is connected to the first shield layer and whose second end is connected to the second shield layer; a first inner shield device arranged on the inner face of the first shield layer; a first outer shield device arranged on the outer face of the first end; a second inner shield device arranged on the inner face of the second shield layer; and a second outer shield device arranged on the outer face of the second end. The shielding mechanism of the invention can effectively connect the shield layers of two connected cables, thereby ensuring the effectiveness and continuity of the cable shielding.

Description

Shielded connection assembly, cable assembly, and method for preparing a cable assembly

[0001] This invention claims priority to Chinese patent application No. 202110272612.6 filed on March 12, 2021, entitled “A shielded connection assembly, cable assembly, and method for preparing a cable assembly,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of cable technology, and in particular to a shielded connection assembly, a cable assembly, and a method for preparing the cable assembly. Background Art

[0003] With the continuous development and widespread application of new energy technologies, more and more vehicles are using batteries as a power source. In battery-equipped vehicles, electrical components such as motors and onboard computers are connected to the battery via cables. The electrical energy in the battery is transmitted through the cables to the electrical components, allowing them to perform their functions. In actual applications, the cable connecting the battery and electrical components is not a single, complete cable, but rather a series of cables connected in sequence.

[0004] Specifically, cables generally include a cable core and a shielding net wrapped around the outside of the cable core; the main function of the cable core is to realize the transmission of power; the main function of the shielding net is to provide good shielding for the cable core to prevent the current in the cable core from causing electromagnetic interference to external electrical components.

[0005] Currently, when two cables are connected, due to the immature connection structure used, a stable and effective connection cannot be formed between the shielding nets of the two cables at the connection point of the cables, which is not conducive to ensuring the electromagnetic shielding effect of the cables.

[0006] Summary of the Invention

[0007] The present invention provides a shielding connection assembly, a cable assembly and a method for preparing the cable assembly, which can effectively improve the electromagnetic shielding effect between cables.

[0008] In one aspect, the present invention provides a shielding connection assembly for connecting a first shielding layer and a second shielding layer. The shielding connection assembly includes: a conductive device, a first shielding embedded device, a first shielding external device, a second shielding embedded device, and a second shielding external device. The conductive device has a first end and a second end, the first end being connected to the first shielding layer, and the second end being connected to the second shielding layer. The first shielding embedded device is disposed on the inner side of the first shielding layer. The first shielding external device is disposed on the outer side of the first end. The first end of the conductive device and the first shielding layer are pressed, welded, or abutted between the first shielding embedded device and the first shielding external device. The second shielding embedded device is disposed on the inner side of the second shielding layer. The second shielding external device is disposed on the outer side of the second end. The second end of the conductive device and the second shielding layer are pressed, welded, or abutted between the second shielding embedded device and the second shielding external device.

[0009] As an example, the inner wall of the conductive device is provided with an inner insulating layer, and the first end and the second end of the conductive device are not provided with an inner insulating layer. The inner insulating layer can provide good protection for the inner side of the conductive device, thereby preventing other components located on the inner side of the conductive device from generating conductive contact with the conductive device.

[0010] As an example, the outer wall of the conductive device is provided with an outer insulating layer, and the first end and the second end of the conductive device are not provided with an outer insulating layer. The outer insulating layer can provide good protection for the outside of the conductive device, thereby preventing other components located outside the conductive device from generating conductive contact with the conductive device.

[0011] On the other hand, the present invention also provides a cable assembly, comprising a first cable and a second cable, and also comprising any one of the above-mentioned shielded connection assemblies; the first cable comprises a first cable core and a first shielding layer, the outer side of the first cable core is covered with a first protective layer, and the first shielding layer is arranged on the outer side of the first protective layer; the second cable comprises a second cable core and a second shielding layer, the outer side of the second cable core is covered with a second protective layer; the second shielding layer is arranged on the outer side of the second protective layer; wherein the first end of the first cable core is connected to the first end of the second cable core.

[0012] In the cable assembly provided by the present invention, the shielding connection assembly can effectively ensure the continuity of electromagnetic shielding between the first cable and the second cable. In addition, the connection strength between the first cable and the second cable can also be effectively improved.

[0013] Among them, in order to improve the connection effect between the first cable core and the second cable core, the minimum cross-sectional area of ​​the overlap or docking position of the first cable core and the second cable core can be greater than or equal to the minimum cross-sectional area of ​​the first cable core and the second cable core, so as to avoid excessive cable resistance due to the small cross-sectional area of ​​the overlap or docking position of the first cable core and the second cable core, and the temperature rise value exceeding the standard requirements when current is passed.

[0014] As an example, the cable assembly further includes an isolation device disposed on the outside of the first end of the first cable core and the outside of the first end of the second cable core. The isolation device can effectively protect the exposed first and second cable cores, thereby improving their safety.

[0015] As an example, one end of the isolation device is connected to the first protective layer, and the other end of the isolation device is connected to the second protective layer. In this way, a sealed protection effect can be formed for the first cable core and the second cable core, thereby further improving their safety. As an example, the first cable also includes a third protective layer, and the second cable also includes a fourth protective layer; the third protective layer is arranged outside the first shielding layer, and the fourth protective layer is arranged outside the second shielding layer.

[0016] The third protective layer can effectively improve the use safety and structural strength of the first cable; correspondingly, the fourth protective layer can effectively improve the use safety and structural strength of the second cable.

[0017] For example, when the outer wall of the conductive device is provided with an outer insulating layer, the cable assembly further includes a first seal and a second seal. The first seal is used to seal the third protective layer and the outer insulating layer, and the second seal is used to seal the fourth protective layer and the outer insulating layer. This effectively improves the sealing performance of the joint between the first cable and the second cable, achieving good dust and water resistance.

[0018] On the other hand, the present invention also provides a method for preparing a cable assembly, comprising: providing a first cable, the first cable comprising a first cable core, a first protective layer, and a first shielding layer, the first protective layer being arranged on the outside of the first cable core, and the first shielding layer being arranged on the outside of the first protective layer; stripping the first shielding layer and the first protective layer at a first end of the first cable to expose the first cable core; providing a second cable, the second cable comprising a second cable core, a second protective layer, and a second shielding layer, the second protective layer being arranged on the outside of the second cable core, and the second shielding layer being arranged on the outside of the second protective layer;

[0019] As an example, before arranging one end of the conductive device outside the first shielding layer and arranging the other end of the conductive device outside the second shielding layer, the method further includes: arranging an isolation device outside the connection between the first cable core and the second cable core.

[0020] The beneficial effects of the present invention are as follows: the shielding connection assembly provided by the present invention can effectively connect the first shielding layer and the second shielding layer through the conductive device, thereby ensuring the electromagnetic shielding performance between the first shielding layer and the second shielding layer; in addition, through the first shielding embedded device and the first shielding external device, the connection stability between the first shielding layer and the conductive device can be effectively guaranteed; correspondingly, through the second shielding embedded device and the second shielding external device, the connection stability between the second shielding layer and the conductive device can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic cross-sectional view of a shielding connection assembly according to an embodiment of the present invention;

[0022] FIG2 is a schematic cross-sectional view of another shielding connection assembly provided by an embodiment of the present invention;

[0023] FIG3 is a schematic cross-sectional view of a cable assembly according to an embodiment of the present invention;

[0024] FIG4 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0025] FIG5 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0026] FIG6 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0027] FIG7 is a schematic diagram of a planar structure of a symmetrically connected shielding layer provided by an embodiment of the present invention;

[0028] FIG8 is a schematic diagram of a three-dimensional structure of a symmetrically connected shielding layer provided by an embodiment of the present invention;

[0029] FIG9 is a schematic diagram of a planar structure of an asymmetrical connection arrangement of shielding layers provided by an embodiment of the present invention;

[0030] FIG10 is a schematic diagram of a three-dimensional structure of an asymmetrical connection arrangement of a shielding layer provided in an embodiment of the present invention;

[0031] FIG11 is a flow chart of a method for preparing a cable assembly provided in an embodiment of the present invention.

[0032] Reference numerals:

[0033] 10-shielded connection assembly; 11-conductive device; 111-inner insulating layer; 112-outer insulating layer; 12-first shielding embedded device; 13-first shielding external device; 14-second shielding embedded device; 15-second shielding external device; 21-first cable; 211-first cable core; 212-first protective layer; 213-first shielding layer; 214-third protective layer; 22-second cable; 221-second cable core; 222-second protective layer; 223-second shielding layer; 224-fourth protective layer; 23-crimping ring; 24-isolating device; 25-first seal; 26-second seal. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] As shown in FIG. 1 , an embodiment of the present invention provides a shielding connection assembly 10 for connecting a first shielding layer 213 and a second shielding layer 223 .

[0036] The shielding connection assembly 10 includes a conductive device 11 , a first shielding embedded device 12 , a first shielding external device 13 , a second shielding embedded device 14 and a second shielding external device 15 .

[0037] Specifically, the first end (left end in the figure) of the conductive device 11 is disposed outside the first shielding layer 213, and the inner wall of the conductive device 11 is in conductive contact with the outer wall of the first shielding layer 213. The second end (right end in the figure) of the conductive device 11 is disposed outside the second shielding layer 223, and the inner wall of the conductive device 11 is in conductive contact with the outer wall of the second shielding layer 223. Thus, the conductive device 11 can achieve electrical connection between the first shielding layer 213 and the second shielding layer 223, thereby ensuring the continuity of electromagnetic shielding between the first shielding layer 213 and the second shielding layer 223.

[0038] In order to improve the connection effect between the conductive device 11 and the first shielding layer 213 and the second shielding layer 223. In the embodiment provided by the present invention, the left end of the conductive device 11 is fixedly connected to the first shielding layer 213 through the first shielding embedded device 12 and the first shielding external device 13, and the right end of the conductive device 11 is fixedly connected to the second shielding layer 223 through the second shielding embedded device 14 and the second shielding external device 15.

[0039] Specifically, the first shielding embedded device 12 is arranged on the inner side of the first shielding layer 213, and the first shielding external device 13 is arranged on the outer side of the conductive device 11. A certain force is applied to the first shielding external device 13 using a tool such as a crimping pliers, so that the first shielding external device 13 is deformed inward. At the same time, since the first shielding embedded device 12 has a certain structural strength, a certain stress is maintained between the first shielding external device 13 and the first shielding embedded device 12, thereby pressing the first shielding layer 213 and the left end of the conductive device 11 between the first shielding external device 13 and the first shielding embedded device 12. Alternatively, the first shielding layer 213 and the left end of the conductive device 11 can be welded between the first shielding embedded device 12 and the first shielding external device 13 by abutting the first shielding embedded device and the first shielding external device, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing.

[0040] Please refer to Figures 1, 7 and 8. Specifically, the first end of the conductive device 11 and the first shielding layer 213 are connected symmetrically, and the second end of the conductive device 11 and the second shielding layer 223 are connected symmetrically.

[0041] Please refer to Figures 9 and 10. If the conductive device 11 and the shielding layer are connected at a single point, a large current will flow at the connection point, generating a magnetic field. This magnetic field will couple with the magnetic field generated by the cable core, causing significant radiation from the entire cable connection, seriously affecting the operation of other electrical appliances. When the conductive device 11 and the shielding layer are connected symmetrically, the magnetic fields generated at the connection point are in opposite directions, canceling each other out and reducing the combined field, thereby reducing radiation at the cable connection and effectively reducing the magnetic field generated by the cable core, minimizing the impact on other electrical appliances.

[0042] As an example, the first end of the conductive device 11 and the first shielding layer 213 are connected at a 360-degree angle. That is, the first end of the conductive device 11 and the free end of the first shielding layer 213 are completely aligned. The second end of the conductive device 11 and the second shielding layer 223 are connected at a 360-degree angle. That is, the second end of the conductive device 11 and the free end of the second shielding layer 223 are completely aligned.

[0043] The connection position between the conductive device 11 and the shielding layer is symmetrically arranged, and the connection position between the conductive device 11 and the shielding layer is 360° connected, which has a great shielding and offsetting effect on the radiation generated by the cable core and the radiation generated by the shielding layer itself, thereby optimizing the anti-shielding effect at the cable connection.

[0044] The test method is as follows: The test instrument outputs a signal value (test value 2) for the first or second cable. A detection device is installed on the outside of the cable assembly, and this detection device detects a signal value (test value 1). The shielding performance value = test value 2 - test value 1.

[0045] Table 1 shows the influence of the connection position of the conductive device and the shielding layer on the shielding performance.

[0046]

[0047] Table 1

[0048] The table above shows the test data for a cable with a certain diameter. The standard requires that the shielding performance value at the connection point between the conductive device and the shielding layer be greater than 60dB.

[0049] When the conductive device and shielding layer are connected at the same dimensions, an asymmetrical arrangement results in a shielding performance value of less than 60dB at the connection point, which does not meet standard requirements. When symmetrically arranged, even with an incomplete connection, the shielding performance value at the connection point still meets standard requirements because electromagnetic radiation is canceled out. Preferably, a 360-degree connection between the conductive device and shielding layer achieves even better shielding performance at the cable connection point.

[0050] In specific implementations, the structural forms of the components in the shielding connection assembly 10 can be diverse.

[0051] For example, the conductive device 11 may be a straight cylindrical structure with a uniform cylindrical diameter in its length direction, or a cylindrical structure with an inconsistent cylindrical diameter (such as gradually increasing or partially increasing).

[0052] Furthermore, the cross-section of the conductive device 11 can be circular, elliptical, polygonal, or irregularly shaped. The cross-sectional shapes of the first and second ends of the conductive device 11 can be the same or different. For example, the cross-sectional shapes of the first and second ends of the conductive device 11 can both be circular; or, the cross-sectional shape of the first end of the conductive device 11 can be circular, while the cross-sectional shape of the second end can be quadrilateral.

[0053] It is understood that, in a specific implementation, the cross-sectional shape of the first end of the conductive device 11 can be adaptively adjusted and matched to the cross-sectional shape of the first shielding layer 213 to improve the connection between the conductive device 11 and the first shielding layer 213. Accordingly, the cross-sectional shape of the second end of the conductive device 11 can be adaptively adjusted and matched to the cross-sectional shape of the second shielding layer 223 to improve the connection between the conductive device 11 and the second shielding layer 223. For example, when the cross-sectional shape of the second shielding layer 223 is annular, the cross-sectional shape of the second end of the conductive device 11 can also be annular, thereby effectively improving the fit between the second shielding layer 223 and the conductive device 11.

[0054] During manufacture, the conductive device 11 can be a tubular structure made of a conductive material such as copper or aluminum; alternatively, the conductive device 11 can be a tubular structure woven from metal wires to provide a certain degree of flexibility, thereby improving the scope of application and seismic resistance. The present invention does not limit the material and manufacturing method of the conductive device 11.

[0055] The cross-section of the first shielding embedded device 12 can be a circular, elliptical or other polygonal or irregularly shaped ring structure, thereby effectively improving the application range of the shielding connection assembly.

[0056] The cross-section of the first external shielding device 13 can be a circular, elliptical or other polygonal or irregularly shaped ring structure, thereby effectively improving the application range of the shielding connection assembly.

[0057] The cross-sectional shapes of the first shielding embedded device 12 and the first shielding external device 13 may be substantially the same, so as to ensure a pressing, welding or abutting effect between the first shielding embedded device 12 and the first shielding external device 13 .

[0058] In addition, in a specific implementation, since the first shielding layer 213 and the first end of the conductive device 11 are crimped or welded or abutted between the first shielding external device 13 and the first shielding embedded device 12, in order to improve the crimping effect, the cross-sectional profiles of the first shielding layer 213, the first end of the conductive device 11, the first shielding embedded device 12 and the first shielding external device 13 can be roughly the same.

[0059] During manufacturing, the first shielding embedded device 12 can be made of copper, aluminum or other materials through cutting, stamping or other processes; correspondingly, the first shielding external device 13 can also be made of copper, aluminum or other materials through cutting, stamping or other processes.

[0060] In addition, in some embodiments, in order to increase the pressing force or fixing force between the first shielding embedded device 12 and the first shielding external device 13, the structural strength of the first shielding embedded device 12 can be greater than the structural strength of the first shielding external device 13; when the pressing force or fixing force is applied to the first shielding external device 13, the first shielding embedded device 12 will not produce obvious deformation.

[0061] The materials and manufacturing methods of the second internal shielding device 14 can be similar to those of the first internal shielding device 12. Accordingly, the materials and manufacturing methods of the second external shielding device 15 can be similar to those of the first external shielding device 13, and are not further described here.

[0062] In addition, in a specific implementation, since the second shielding layer 223 and the second end of the conductive device 11 are crimped or welded or abutted between the second shielding external device 15 and the second shielding embedded device 14, in order to improve the crimping effect, the cross-sectional profiles of the second shielding layer 223, the second end of the conductive device 11, the second shielding embedded device 14 and the second shielding external device 15 can be roughly the same.

[0063] As shown in FIG2 , in some embodiments, an inner insulating layer 111 may be provided on the inner wall of the conductive device 11 to prevent short circuits and other problems between the conductive device 11 and other internal components. Furthermore, to ensure electrical connection between the inner wall of the conductive device 11 and the first and second shielding layers 213 and 223, no inner insulating layer is provided at the first and second ends of the conductive device.

[0064] In addition, an outer insulating layer 112 may be provided on the outer wall of the conductive device 11 to prevent short circuits and other problems between the conductive device 11 and other external components. Furthermore, to ensure electrical connection between the outer wall of the conductive device 11 and the first and second shielding external devices 13 and 15, no outer insulating layer is provided at the first and second ends of the conductive device.

[0065] Among them, the inner insulating layer 111 and the outer insulating layer 112 can be made of a combination of one or more materials selected from polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene, or can be made of other materials with good electrical insulation properties, and the present invention is not limited to this.

[0066] In specific applications, the shielding connection assembly 10 can be used in a cable with a shielding structure to effectively connect the shielding structures of two cables.

[0067] For example, as shown in FIG3 , an embodiment of the present invention further provides a cable assembly, including a first cable 21 , a second cable 22 and a shielding connection assembly 10 .

[0068] The first cable 21 includes a first cable core 211 and a first shielding layer 213 . The first cable core 211 is covered with a first protective layer 212 . The first shielding layer 213 is disposed on the outside of the first protective layer 212 .

[0069] The main function of the first cable core 211 is to realize the transmission of electric energy. In specific configuration, the first cable core 211 can be made of materials with good conductive properties such as copper and aluminum.

[0070] The first protective layer 212 is wrapped around the outside of the first cable core 211, thereby providing good protection for the first cable core 211. In a specific configuration, the first protective layer 212 can be made of a combination of one or more insulating materials selected from polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene, thereby providing good electrical insulation for the first cable core 211.

[0071] Correspondingly, the second cable 22 includes a second cable core 221 and a second shielding layer 223 . The outer side of the second cable core 221 is covered with a second protective layer 222 , and the second shielding layer 223 is arranged on the outer side of the second protective layer 222 .

[0072] The second cable core 221 mainly functions to transmit electrical energy. In specific configuration, the second cable core 221 can be made of materials with good electrical conductivity, such as copper and aluminum.

[0073] The second protective layer 222 is wrapped around the outside of the second cable core 221, thereby providing good protection for the second cable core 221. In a specific configuration, the second protective layer 222 can be made of a combination of one or more insulating materials selected from polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene, thereby providing good electrical insulation for the second cable core 221.

[0074] In order to achieve electrical connection between the first cable 21 and the second cable 22 , one end of the first cable core 211 is connected to one end of the second cable core 221 .

[0075] In a specific implementation, the first cable core 211 and the second cable core 221 can be overlapped or butted. Wherein, overlapping means that the first cable core 211 and the second cable core 221 have an overlapping area. Butt joint means that the end face of the first cable core 211 and the end face of the second cable core 221 are connected.

[0076] In a specific implementation, the first cable core 211 and the second cable core 221 can be connected by using processes such as crimping, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing, or other methods.

[0077] For example, as shown in FIG3 , in one embodiment of the present invention, the first cable core 211 and the second cable core 221 are connected by crimping. Specifically, the end of the first cable core 211 is butted against the end of the second cable core 221, and a crimping ring 23 is disposed on the outside of the butt joint between the first cable core 211 and the second cable core 221. The crimping ring 23 is compressed using a tool such as a crimping pliers to securely attach the crimping ring 23 to the outside of the first cable core 211 and the second cable core 221, thereby achieving a conductive connection between the first cable core 211 and the second cable core 221.

[0078] In specific configuration, the crimping ring 23 may be made of a material with good electrical conductivity, such as copper or aluminum, to improve the electrical connection performance between the first cable core 211 and the second cable core 221 .

[0079] It is understood that, in a specific implementation, the cross-sectional profiles of the first cable core 211 and the second cable core 221 may be the same or different. For example, the cross-sectional profiles of the first cable core 211 and the second cable core 221 may both be circular.

[0080] Alternatively, in other embodiments, the joint between the first cable core 211 and the second cable core 221 may be specially treated to increase the effective contact area therebetween, thereby improving the electrical connection performance between the first cable core 211 and the second cable core 221 .

[0081] For example, as shown in FIG4 , in one embodiment of the present invention, the first cable core 211 and the second cable core 221 are connected by welding. Specifically, approximately half of the cable core is cut off at the right end of the first cable core 211, thereby forming a contact surface with a larger area; approximately half of the cable core is also cut off at the left end of the second cable core 221, thereby forming a contact surface with a larger area. When welding the first cable core 211 and the second cable core 221, the first cable core 211 and the second cable core 221 can be partially overlapped, thereby increasing the welding area between the first cable core 211 and the second cable core 221, thereby ensuring the connection effect between the first cable core 211 and the second cable core 221. The minimum cross-sectional area of ​​the overlap or docking position of the first cable core 211 and the second cable core 221 can be greater than or equal to the minimum cross-sectional area of ​​the first cable core 211 or the second cable core 221.

[0082] In another embodiment, the thickness of the first shielding layer 213 , the second shielding layer 223 and the conductive device 11 may be between 0.003 mm and 27 mm.

[0083] The test method is as follows: The test instrument outputs a signal value (test value 2) for the first or second cable. A detection device is installed on the outside of the cable assembly, and this detection device detects a signal value (test value 1). The shielding performance value = test value 2 - test value 1.

[0084] Table 2 shows the effect of the thickness of the shielding layer and the conductive device on the shielding performance and the increase in the bending radius.

[0085]

[0086]

[0087]

[0088] Table 2

[0089] The table above shows the test data for a cable with a certain diameter. The standard requires that the shielding performance value at the connection point between the conductive device and the shielding layer be greater than 60dB.

[0090] According to the test results shown in the table, it can be seen that when the thickness of the first shielding layer 213, the second shielding layer 223 and the conductive device 11 is between 0.003mm and 27mm, the shielding performance of the first cable 21 and the second cable 22 will increase with the increase of thickness. However, when the thickness of the first shielding layer 213, the second shielding layer 223 and the conductive device 11 exceeds 27mm, the shielding performance of the first cable 21 and the second cable 22 changes little and has no obvious improvement. When the thickness of the first shielding layer 213, the second shielding layer 223 and the conductive device 11 exceeds 27mm, the shielding performance of the first cable 21 and the second cable 22 changes little and has no obvious improvement. When the thickness of the device 11 is between 0.003 mm and 27 mm, the increase in the turning radius of the first cable 21 and the second cable 22 will increase with the increase in thickness. However, when the thickness of the first shielding layer 213, the second shielding layer 223 and the conductive device 11 exceeds 27 mm, the increase in the turning radius of the first cable 21 and the second cable 22 exceeds 200 mm, which is not conducive to actual processing. Therefore, it is preferred that the thickness of the first shielding layer 213, the second shielding layer 223 and the conductive device 11 is 0.003 mm to 27 mm.

[0091] In addition, the outer surface area of ​​the first shielding embedded device 12 connected to the first shielding layer 213 is greater than 1.3% of the outer surface area of ​​the first shielding embedded device 12 , thereby ensuring the connection effect between the first shielding embedded device 12 and the first shielding layer 213 .

[0092] Furthermore, the outer surface area of ​​the connection between the second shielding embedded device 14 and the second shielding layer 223 is greater than 1.3% of the outer surface area of ​​the second shielding embedded device 14. This ensures a strong connection between the second shielding embedded device 14 and the second shielding layer 223. Specifically, the larger the connection area between the first shielding embedded device 12 or the second shielding embedded device 14 and the first shielding layer 213 or the second shielding layer 223, the better the mechanical properties between the two. In a practical environment, as long as the pull-out force between the first shielding embedded device 12 or the second shielding embedded device 14 and the first shielding layer 213 or the second shielding layer 223 meets standard requirements, the first shielding embedded device 12 or the second shielding embedded device 14 and the first shielding layer 213 or the second shielding layer 223 will not be broken by external forces. After a large number of experiments and tests, it was found that when the outer surface area of ​​the first shielding embedded device 12 connected to the first shielding layer 213 is less than 1.3% of the outer surface area of ​​the first shielding embedded device 12; the outer surface area of ​​the second shielding embedded device 14 connected to the second shielding layer 223 is less than 1.3% of the outer surface area of ​​the second shielding embedded device 14; the first shielding embedded device 12 or the second shielding embedded device 14 and the first shielding layer 213 or the second shielding layer 223 cannot meet the pull-out force required by the standard, and are thus pulled apart, resulting in a decrease in shielding performance or even failure, and in severe cases, the shielding function may be lost.

[0093] Table 3 shows the influence of the connection area between the shielding embedded device and the shielding layer on the pull-out force between the shielding embedded device and the shielding layer.

[0094] Ratio of the outer surface area of ​​the shield embedded device and the shield layer to the outer surface area of ​​the shield embedded device (%)

[0095]

[0096] Table 3

[0097] The table above shows the test data for a cable with a certain diameter. The standard requires that the pull-out force between the shielded embedded device and the shielding layer be greater than 50N.

[0098] In addition, the outer surface area of ​​the first shielding external device 13 connected to the first shielding layer 213 is greater than 1.4% of the outer surface area of ​​the first shielding external device 13 , thereby ensuring the connection effect between the first shielding external device 13 and the first shielding layer 213 .

[0099] In addition, the outer surface area of ​​the second shielding external device 15 connected to the second shielding layer 223 is greater than 1.4% of the outer surface area of ​​the second shielding external device 15 , thereby ensuring the connection effect between the second shielding external device 15 and the second shielding layer 223 .

[0100] Similarly, the larger the connection area between the first external shielding device 13 or the second external shielding device 15 and the first shielding layer 213 or the second shielding layer 223, the better the mechanical properties between the two. In a practical environment, as long as the pull-out force between the first external shielding device 13 or the second external shielding device 15 and the first shielding layer 213 or the second shielding layer 223 meets the standard requirements, the device will not be broken by external forces. After extensive experiments and testing, it was found that when the outer surface area of ​​the connection between the first external shielding device 13 and the first shielding layer 213 is less than 1.4% of the outer surface area of ​​the first external shielding device 13, and the outer surface area of ​​the connection between the second external shielding device 15 and the second shielding layer 223 is less than 1.4% of the outer surface area of ​​the second external shielding device 15, the first external shielding device 13 or the second external shielding device 15 and the first shielding layer 213 or the second shielding layer 223 cannot meet the pull-out force requirements of the standard, and thus the device will be broken, resulting in a decrease in shielding performance or even failure, and in severe cases, loss of shielding function.

[0101] Table 4 shows the influence of the connection area between the shielding external device and the shielding layer on the pull-out force between the shielding external device and the shielding layer.

[0102]

[0103]

[0104] Table 4

[0105] The table above shows the test data for a cable with a certain diameter. The standard requires that the pull-out force between the shielding device and the shielding layer be greater than 50N.

[0106] In addition, the minimum cross-sectional area of ​​the connection position 213 between the first end of the conductive device 11 and the first shielding layer is 60%-260% of the cross-sectional area of ​​the first shielding layer, thereby ensuring the connection effect between the first end of the conductive device 11 and the first shielding layer 213.

[0107] In addition, the minimum cross-sectional area of ​​the second end of the conductive device 11 and the second shielding layer connection position 223 is 60%-260% of the cross-sectional area of ​​the second shielding layer, thereby ensuring the connection effect between the second end of the conductive device 11 and the second shielding layer 223.

[0108] The primary function of the first and second shielding layers 213, 223, is to ground eddy currents generated by the current flowing through the cable core, thereby preventing electromagnetic interference. If the minimum cross-sectional area at the connection between the first end of the conductive device 11 and the first shielding layer 213, or the second end of the conductive device 11 and the second shielding layer 223, is less than the standard requirement, localized heating may occur at the cable shield connection. In severe cases, this may burn through the connection between the conductive device 11 and the first and second shielding layers 213, 223, resulting in a decrease in cable shielding performance or even failure.

[0109] Table 5 shows the effect of the ratio of the minimum cross-sectional area of ​​the connection position between the conductive device and the first shielding layer to the cross-sectional area of ​​the first shielding layer on the temperature rise between the conductive device and the shielding layer.

[0110]

[0111] Table 5

[0112] Table 6 shows the influence of the ratio of the minimum cross-sectional area of ​​the connection position between the conductive device and the second shielding layer to the cross-sectional area of ​​the second shielding layer on the temperature rise between the conductive device and the shielding layer.

[0113]

[0114] Table 6

[0115] The table above shows the test data for a cable with a certain diameter. The standard requires that the temperature rise between the conductive device and the shielding layer be less than 50°C.

[0116] It can be seen from the above table that when the ratio of the minimum cross-sectional area of ​​the connection position between the first end of the conductive device 11 and the first shielding layer 213 or the second end of the conductive device 11 and the second shielding layer 223 to the cross-sectional area of ​​the first shielding layer or the second shielding layer is less than 60%, the temperature rise value between the conductive device 11 and the first shielding layer 213 and the second shielding layer 223 does not meet the standard requirements.

[0117] When the ratio of the minimum cross-sectional area of ​​the connection position between the first end of the conductive device 11 and the first shielding layer 213 or the second end of the conductive device 11 and the second shielding layer 223 to the cross-sectional area of ​​the first shielding layer or the second shielding layer is greater than 260%, at this time, since the cross-sectional area of ​​the connection position between the conductive device 11 and the first shielding layer 213 and the second shielding layer 223 is already much larger than the minimum conduction area of ​​the eddy current, the temperature rise value between the conductive device 11 and the first shielding layer 213 and the second shielding layer 223 is basically the same as when the ratio is 260%, but the cost and processing cycle are higher.

[0118] Therefore, preferably, the minimum cross-sectional area between the first end of the conductive device 11 and the first shielding layer connection position 213 is 60%-260% of the first shielding layer cross-sectional area. The minimum cross-sectional area between the second end of the conductive device 11 and the second shielding layer connection position 223 is 60%-260% of the second shielding layer cross-sectional area.

[0119] Specifically, the impedance of the connection point between the first end of the conductive device and the first shielding layer is less than 13.7 mΩ, and the impedance of the connection point between the second end of the conductive device and the second shielding layer is less than 13.7 mΩ.

[0120] As a preferred embodiment, the impedance of the connection point between the first end of the conductive device and the first shielding layer is less than 12.5 mΩ, and the impedance of the connection point between the second end of the conductive device and the second shielding layer is less than 12.5 mΩ.

[0121] The impedance of the connection point between the conductive device and the shielding layer should be as small as possible so that the current generated by the shielding layer can flow back to the energy source or grounding position without hindrance. If the impedance of the connection point between the conductive device and the shielding layer is large, a large current will be generated at the connection point between the conductive device and the shielding layer, resulting in greater radiation at the cable connection.

[0122] The test method is as follows: The test instrument outputs a signal value (test value 2) for the first or second cable. A detection device is installed on the outside of the cable assembly, and this detection device detects a signal value (test value 1). The shielding performance value = test value 2 - test value 1.

[0123] Table 7 shows the effect of the impedance at the connection point between the conductive device and the shielding layer on the shielding performance.

[0124]

[0125] Table 7

[0126] The table above shows the test data for a cable with a certain diameter. The standard requires that the shielding performance value at the connection point between the conductive device and the shielding layer be greater than 60dB.

[0127] When the impedance at the connection point between the first end of the conductive device and the first shielding layer is greater than 13.7 mΩ, and the impedance at the connection point between the second end of the conductive device and the second shielding layer is greater than 13.7 mΩ, the shielding performance value at the connection point between the conductive device and the shielding layer is less than 60 dB, which does not meet the standard requirements. Furthermore, when the impedance at the connection point between the first end of the conductive device and the first shielding layer is less than 12.5 mΩ, and the impedance at the connection point between the second end of the conductive device and the second shielding layer is less than 12.5 mΩ, the shielding performance value at the connection point between the conductive device and the shielding layer does not change much. Therefore, the inventors set the impedance at the connection point between the first end of the conductive device and the first shielding layer to be less than 13.7 mΩ, and the impedance at the connection point between the second end of the conductive device and the second shielding layer to be less than 13.7 mΩ.

[0128] As a preferred embodiment, the impedance of the connection point between the first end of the conductive device and the first shielding layer is less than 12.5 mΩ, and the impedance of the connection point between the second end of the conductive device and the second shielding layer is less than 12.5 mΩ.

[0129] In another embodiment, in order to provide good protection for the connection between the first cable core 211 and the second cable core 221 , in the embodiment provided by the present invention, an isolation device 24 is further provided on the outside of the connection between the first cable core 211 and the second cable core 221 .

[0130] In a specific configuration, the isolation device 24 can be a heat shrink tube, or a combination of one or more insulating materials selected from polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene, injection-molded on the outside of the joint. The left end of the isolation device 24 can be connected to the first protective layer 212 of the first cable 21, and the right end of the isolation device 24 can be connected to the second protective layer 222 of the second cable 22, thereby effectively protecting the first cable core 211 and the second cable core 221.

[0131] As shown in FIG5 and FIG6 , in actual application, the first cable 21 may further include a third protective layer 214 (also known as an outer sheath); the second cable 22 may further include a fourth protective layer 224 (also known as an outer sheath).

[0132] Specifically, the third protective layer 214 is arranged on the outside of the first shielding layer 213 to prevent the first shielding layer 213 from generating conductive contact with other components, thereby improving the safety of the first cable 21 and improving the overall waterproof and dustproof properties of the first cable 21.

[0133] In a specific implementation, the third protective layer 214 can be made of a composite insulating material of one or more of polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene.

[0134] Correspondingly, in the second cable 22, the fourth protective layer 224 is arranged on the outside of the second shielding layer 223 to prevent the second shielding layer 223 from making conductive contact with other components, thereby improving the safety of the second cable 22. In addition, it can also improve the overall waterproof and dustproof properties of the second cable 22.

[0135] In a specific implementation, the fourth protective layer 224 can be made of a composite insulating material of one or more of polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene.

[0136] In addition, as shown in Figures 5 and 6, the embodiment provided in this application further includes a first seal 25 and a second seal 26. In specific applications, the first seal 25 and the second seal 26 can be made of a combination of one or more insulating materials selected from polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, and polyethylene.

[0137] The first seal 25 is used to seal the third protective layer 214 and the outer insulating layer 112, thereby preventing impurities such as water vapor and dust from entering the interior of the first cable 21 through the connection between the shielded connection assembly 10 and the first cable 21. The second seal 26 is used to seal the fourth protective layer 224 and the outer insulating layer 112, thereby preventing impurities such as water vapor and dust from entering the interior of the second cable 22 through the connection between the shielded connection assembly 10 and the second cable 22, thereby effectively ensuring the airtightness of the entire cable assembly.

[0138] The first sealing member 25 can be directly formed on the outside of the third protective layer 214 and the outer insulating layer 112 by injection molding, dispensing, or other processes. Alternatively, the first sealing member 25 can also be a pre-formed structural member, which is then fixed to the outside of the third protective layer 214 and the outer insulating layer 112 by bonding or other processes.

[0139] Accordingly, the second sealing member 26 can be directly formed on the outside of the fourth protective layer 224 and the outer insulating layer 112 by injection molding, dispensing, or other processes. Alternatively, the second sealing member 26 can also be a pre-formed structural member, which is then fixed to the outside of the fourth protective layer 224 and the outer insulating layer 112 by bonding or other processes.

[0140] Among them, the present invention does not make specific limitations on the molding method of the first seal 25 and the bonding method between the first seal 25 and the third protective layer 214 and the outer insulating layer 112; accordingly, the present invention does not make specific limitations on the molding method of the second seal 26 and the bonding method between the second seal 26 and the fourth protective layer 224 and the outer insulating layer 112.

[0141] When preparing the cable assembly, the following steps can be taken:

[0142] Referring to FIG. 5 and FIG. 11 , the method may include:

[0143] S10: Provide a first cable 21 , wherein the first cable 21 includes a first cable core 211 , a first protective layer 212 , and a first shielding layer 213 . The first protective layer 212 is disposed outside the first cable core 211 , and the first shielding layer 213 is disposed outside the first protective layer 212 .

[0144] S11 . Strip the first shielding layer 213 and the first protective layer 212 of the first end of the first cable 21 (the right end of the first cable 21 in FIG. 5 ) to expose the first cable core 211 .

[0145] S20: Provide a second cable 22. The second cable 22 includes a second cable core 221, a second protective layer 222, and a second shielding layer 223. The second protective layer 222 is disposed outside the second cable core 221, and the second shielding layer 223 is disposed outside the second protective layer 222.

[0146] S21 . Peel off the second shielding layer 223 and the second protective layer 222 of the first end of the second cable 22 (the left end of the second cable 22 in FIG. 5 ) to expose the second cable core 221 .

[0147] S22 . Connect the first end of the first cable core 211 to the first end of the second cable core 221 to achieve electrical connection between the first cable core 211 and the second cable core 221 .

[0148] S30 , providing a shielding connection assembly 10 , wherein the shielding connection assembly 10 includes: a conductive device 11 , a first shielding embedded device 12 , a first shielding external device 13 , a second shielding embedded device 14 and a second shielding external device 15 .

[0149] S31 , disposing the first shielding embedded device 12 inside the first shielding layer 213 , and disposing the second shielding embedded device 14 inside the second shielding layer 223 .

[0150] S32: Dispose the first end of the conductive device 11 outside the first shielding layer 213 and the second end of the conductive device 11 outside the second shielding layer 223, thereby achieving connection between the first shielding layer 213 and the second shielding layer 223.

[0151] S33 , disposing the first external shielding device 13 outside the first end of the conductive device 11 , and disposing the second external shielding device 15 outside the second end of the conductive device 11 .

[0152] It is understood that, in a specific implementation, the first external shielding device 13 can be pre-placed outside the first end of the conductive device 11, and then the first end of the conductive device 11 can be placed outside the first shielding layer 213. Correspondingly, the second external shielding device 15 can be pre-placed outside the second end of the conductive device 11, and then the second end of the conductive device 11 can be placed outside the second shielding layer 223.

[0153] S34. Weld the first end of the conductive device 11 and the first shielding layer 213 between the first shielding embedded device 12 and the first shielding external device 13, and weld the second end of the conductive device 11 and the second shielding layer 223 between the second shielding embedded device 14 and the second shielding external device 15. Crimping the first end of the conductive device 11 and the first shielding layer 213 between the first shielding embedded device 12 and the first shielding external device 13, and crimping the second end of the conductive device 11 and the second shielding layer 223 between the second shielding embedded device 14 and the second shielding external device 15; or, abutting the first end of the conductive device 11 and the first shielding layer 213 between the first shielding embedded device 12 and the first shielding external device 13, and abutting the second end of the conductive device 11 and the second shielding layer 223 between the second shielding embedded device 14 and the second shielding external device 15.

[0154] During welding, laser welding, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing can be used to weld the conductive device 11 to the first shielding layer 213, the first shielding layer 213 to the first shielding embedded device 12, and the conductive device 11 to the first shielding external device 13. Correspondingly, laser welding, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing can also be used to weld the conductive device 11 to the second shielding layer 223, the second shielding layer 223 to the second shielding embedded device 14, and the conductive device 11 to the second shielding external device 15.

[0155] During crimping, tools such as crimping pliers can be used to apply force to the first shielding external device 13 and the second shielding external device 14 to achieve a crimping connection between the first shielding external device 13 and the first shielding embedded device 12; and to achieve a crimping connection between the second shielding external device 15 and the second shielding embedded device 14.

[0156] During this process, since the first shielding embedded device 12 has a certain strength, it can also provide a certain degree of protection for the first cable core 211, preventing the first cable core 211 from being significantly squeezed. Correspondingly, since the second shielding embedded device 14 has a certain strength, it can also provide a certain degree of protection for the second cable core 221, preventing the second cable core 221 from being significantly squeezed.

[0157] In step S22 , connecting the first end of the first cable core 211 with the first end of the second cable core 221 specifically includes: connecting the first end of the first cable core 211 with the first end of the second cable core 221 by welding or crimping.

[0158] It is understandable that, in specific implementation, other methods may be used to connect the first cable core 211 and the second cable core 221 to achieve conductive and mechanical connections between the first cable core 211 and the second cable core 221 .

[0159] In addition, before step S32 , the method further includes: providing an isolation device 24 outside the connection between the first cable core 211 and the second cable core 221 to prevent adverse conditions such as conductive contact between the connection and the conductive device 11 .

[0160] The isolation device 24 may be a heat shrink tube or other insulating layer directly injection molded on the outside of the connection.

[0161] In addition, in some embodiments, when the outer side of the first cable 21 has a third protective layer 214, when performing step S11, the step further includes peeling off the third protective layer 214 of the first cable 21. Correspondingly, when the outer side of the second cable 22 has a fourth protective layer 224, when performing step S21, the step further includes peeling off the fourth protective layer 224 of the second cable 22.

[0162] It is understandable that when preparing the cable assembly, the production sequence can be adaptively adjusted according to actual conditions. In addition, some steps can be added or omitted, and this application does not make specific limitations on this.

[0163] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A shielding connection assembly for connecting a first shielding layer and a second shielding layer, It is characterized in that The shielding connection assembly comprises: A conductive device having a first end and a second end; the first end is connected to the first shielding layer; the second end is connected to the second shielding layer; A first shielding embedded device, arranged on the inner side of the first shielding layer; A first external shielding device, arranged on the outer side of the first end; wherein the first end of the conductive device and the first shielding layer are pressed or welded or abutted between the first shielding embedded device and the first shielding external device; A second shielding embedded device, arranged on the inner side of the second shielding layer; A second external shielding device, arranged outside the second end; The second end of the conductive device and the second shielding layer are pressed, welded or abutted between the second shielding embedded device and the second shielding external device.

2. The shield connection assembly according to claim 1, It is characterized in that The connection position between the first end of the conductive device and the first shielding layer is symmetrically connected, and the connection position between the second end of the conductive device and the second shielding layer is symmetrically connected.

3. The shield connection assembly according to claim 1, It is characterized in that The connection position between the first end of the conductive device and the first shielding layer is 360° connected, and the connection position between the second end of the conductive device and the second shielding layer is 360° connected.

4. The shield connection assembly according to claim 1, It is characterized in that The cross-sectional shapes of the first shielding embedded device and the first shielding external device are circular, elliptical, polygonal or irregularly shaped annular structures.

5. The shield connection assembly according to claim 1, It is characterized in that The cross-sectional shapes of the second shielding embedded device and the second shielding external device are circular, elliptical, polygonal or irregularly shaped annular structures.

6. The shield connection assembly according to claim 1, It is characterized in that The inner wall of the conductive device is provided with an inner insulating layer; Furthermore, the inner insulating layer is not provided at the first end and the second end of the conductive device.

7. The shield connection assembly according to claim 1, It is characterized in that The outer wall of the conductive device is provided with an outer insulating layer; Furthermore, the outer insulating layer is not provided at the first end and the second end of the conductive device.

8. A cable assembly, It is characterized in that comprising a first cable and a second cable, The first cable comprises a first cable core and a first shielding layer, the outer side of the first cable core is covered with a first protective layer, and the first shielding layer is arranged on the outer side of the first protective layer; The second cable comprises a second cable core and a second shielding layer, the outer side of the second cable core is covered with a second protective layer; the second shielding layer is arranged on the outer side of the second protective layer; Wherein, the first end of the first cable core is connected to the first end of the second cable core; The cable assembly further comprises a shielding connection assembly as claimed in any one of claims 1 to 7.

9. The cable assembly according to claim 8, It is characterized in that The first cable core is overlapped or butt-jointed with the second cable core.

10. The cable assembly according to claim 9, It is characterized in that The minimum cross-sectional area of ​​the overlapping or butting position is greater than or equal to the minimum cross-sectional area of ​​the first cable core and the second cable core.

11. The cable assembly according to claim 8, It is characterized in that The thickness of the first shielding layer, the second shielding layer or the conductive device is between 0.003 mm and 27 mm.

12. The cable assembly according to claim 8, It is characterized in that The outer surface area of ​​the first shielding embedded device connected to the first shielding layer is greater than 1.3% of the outer surface area of ​​the first shielding embedded device.

13. The cable assembly according to claim 8, It is characterized in that The outer surface area of ​​the second shielding embedded device connected to the second shielding layer is greater than 1.3% of the outer surface area of ​​the second shielding embedded device.

14. The cable assembly according to claim 8, It is characterized in that The outer surface area of ​​the first shielding outer embedded device connected to the first shielding layer is greater than 1.4% of the outer surface area of ​​the first shielding outer embedded device.

15. The cable assembly according to claim 8, It is characterized in that The outer surface area of ​​the second shielding embedded device connected to the second shielding layer is greater than 1.4% of the outer surface area of ​​the second shielding embedded device.

16. The cable assembly according to claim 8, It is characterized in that The minimum cross-sectional area of ​​the connection position between the first end of the conductive device and the first shielding layer is 60%-260% of the cross-sectional area of ​​the first shielding layer.

17. The cable assembly according to claim 8, It is characterized in that The minimum cross-sectional area of ​​the connection position between the second end of the conductive device and the second shielding layer is 60%-260% of the cross-sectional area of ​​the second shielding layer.

18. The cable assembly according to claim 8, It is characterized in that The impedance of a connection point between the first end of the conductive device and the first shielding layer is less than 13.7 mΩ, and the impedance of a connection point between the second end of the conductive device and the second shielding layer is less than 13.7 mΩ.

19. The cable assembly according to claim 8, It is characterized in that The impedance of a connection point between the first end of the conductive device and the first shielding layer is less than 12.5 mΩ, and the impedance of a connection point between the second end of the conductive device and the second shielding layer is less than 12.5 mΩ.

20. The cable assembly according to claim 8, It is characterized in that The cable assembly also includes an isolation device; The isolation device is arranged on the outside of the first end of the first cable core; and, an outer side of the first end of the second cable core.

21. The cable assembly according to claim 20, It is characterized in that One end of the isolation device is connected to the first protective layer, and the other end of the isolation device is connected to the second protective layer.

22. The cable assembly according to claim 8, It is characterized in that The first cable further includes a third protective layer, and the second cable further includes a fourth protective layer; The third protection layer is disposed on the outer side of the first shielding layer, and the fourth protection layer is disposed on the outer side of the second shielding layer.

23. The cable assembly according to claim 22, It is characterized in that When the outer wall of the conductive device is provided with an outer insulating layer, the cable assembly further comprises a first seal and a second seal; The first sealing member is used for sealingly connecting the third protective layer and the outer insulating layer; The second sealing member is used for sealingly connecting the fourth protective layer and the outer insulating layer.

24. A method for preparing a cable assembly, It is characterized in that include: Providing a first cable, the first cable comprising a first cable core, a first protective layer and a first shielding layer, the first protective layer being arranged on the outside of the first cable core, and the first shielding layer being arranged on the outside of the first protective layer; Stripping a first shielding layer and a first protective layer of a first end of the first cable to expose the first cable core; Providing a second cable, the second cable comprising a second cable core, a second protective layer and a second shielding layer, the second protective layer being arranged on the outside of the second cable core, and the second shielding layer being arranged on the outside of the second protective layer; Stripping the second shielding layer and the second protective layer of the first end of the second cable to expose the second cable core; Connecting the first end of the first cable core to the first end of the second cable core; A shielding connection assembly is provided, the shielding connection assembly comprising: a conductive device, a first shielding embedded device, a first shielding external device, a second shielding embedded device and a second shielding external device; Disposing the first shielding embedded device on the inner side of the first shielding layer; Disposing the second shielding embedded device on the inner side of the second shielding layer; Disposing a first end of the conductive device on the outside of the first shielding layer, and disposing a second end of the conductive device on the outside of the second shielding layer; Disposing the first external shielding device on the outside of the first end of the conductive device; Disposing the second external shielding device on the outside of the second end of the conductive device; The first end of the conductive device and the first shielding layer are welded between the first shielding embedded device and the first shielding external device, and the second end of the conductive device and the second shielding layer are welded between the second shielding embedded device and the second shielding external device; or, the first end of the conductive device and the first shielding layer are crimped between the first shielding embedded device and the first shielding external device, and the second end of the conductive device and the second shielding layer are crimped between the second shielding embedded device and the second shielding external device; or, the first end of the conductive device and the first shielding layer are abutted between the first shielding embedded device and the first shielding external device, and the second end of the conductive device and the second shielding layer are abutted between the second shielding embedded device and the second shielding external device.

25. The preparation method according to claim 24, It is characterized in that Connecting the first end of the first cable core with the first end of the second cable core specifically includes: The first end of the first cable core is connected to the first end of the second cable core by welding or crimping.

26. The preparation method according to claim 24, It is characterized in that Before disposing one end of the conductive device on the outside of the first shielding layer and disposing the other end of the conductive device on the outside of the second shielding layer, the method further includes: An isolation device is arranged outside the connection between the first cable core and the second cable core.