CABLE ASSEMBLY AND CABLE ASSEMBLY MANUFACTURING METHODS

Abstract

The invention relates to a cable assembly and a method for producing cable assemblies, which relates to the field of cable engineering, and addresses the problem of incomplete cable connection structures. The proposed cable assembly under the invention comprises a first cable and a second cable. The first cable consists of a first cable core and a first shielding layer. The outer surface of the first cable core is covered by a first shielding layer, and the first shielding layer is positioned outside the first shielding layer. The second cable consists of a first cable core and a second shielding layer. The outer surface of the second cable core is covered by a second shielding layer, and the second shielding layer is positioned outside the second shielding layer. The first shielding layer is electrically connected to the second shielding layer, thereby achieving continuity of the electromagnetic shielding structure of the first and second cables, and effectively improving the electromagnetic shielding efficiency of the cable assembly.

Description

Cable assembly and method for preparing the same Technical Field

[0001] The present invention relates to the field of cable technology, and in particular to a cable assembly and a method for preparing the cable assembly. Background Art

[0002] 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.

[0003] 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 to prevent the current in the cable core from causing electromagnetic interference to external electrical components.

[0004] 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.

[0005] Summary of the Invention

[0006] The present invention provides a cable assembly and a method for preparing the cable assembly, which can effectively improve the electromagnetic shielding effect between cables.

[0007] On the one hand, the present invention provides a cable assembly, comprising: a first cable and a second cable. The first cable comprises a first cable core and a first shielding layer, the outer periphery of the first cable core is coated 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 periphery of the second cable core is coated with a second protective layer, and the second shielding layer is arranged on the outer side of the second protective layer. The free end of the first cable core is connected to the free end of the second cable core to achieve electrical connection between the first cable core and the second cable core. The free end of the first shielding layer is connected to the free end of the second shielding layer, thereby achieving electrical connection between the shielding layers of the first cable and the second cable, ensuring the continuity of the electromagnetic shielding structure of the cable assembly, and effectively improving the electromagnetic shielding effect of the cable assembly.

[0008] The connection positions of the first shielding layer and the second shielding layer are symmetrically arranged.

[0009] If the first and second shielding layers are connected at a single point, a large current will flow through the connection, generating a magnetic field. This magnetic field will couple with the magnetic field generated by the cable core, causing significant radiation at the entire cable connection, seriously affecting the operation of other electrical appliances. When the first and second shielding layers are connected symmetrically, the magnetic fields generated at the connection point are in opposite directions, canceling each other out and reducing the resulting 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.

[0010] The connection position of the first shielding layer and the second shielding layer is set to be 360° connected.

[0011] The connection position of the first shielding layer and the second shielding layer is symmetrically arranged, and the connection position of the first shielding layer and the second 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.

[0012] When the free end of the first shielding layer and the free end of the second shielding layer are connected, they can be connected in a butt-jointed or overlapped manner to improve the convenience of connection.

[0013] In addition, in order to improve the connection strength between the first shielding layer and the second shielding layer, welding may be used to achieve a fixed connection between the first shielding layer and the second shielding layer.

[0014] The cable assembly also includes a conductive device disposed partially around the first and second cable cores, with a first end of the conductive device connected to the free end of the first shielding layer, and a second end of the conductive device connected to the free end of the second shielding layer. When the connection length between the first and second shielding layers is insufficient, the conductive device can be used to provide a transitional connection while also ensuring shielding effectiveness at the connection location.

[0015] As an example, the connection positions of the first end of the conductive device and the free end of the first shielding layer are symmetrically connected, and the connection positions of the second end of the conductive device and the free end of the second shielding layer are symmetrically connected.

[0016] If the conductive device and the shielding layer are connected at a single point, a large current will flow through the connection, generating a magnetic field. This magnetic field will couple with the magnetic field generated by the cable core, causing a large amount of radiation from the entire cable connection, seriously affecting the operation of other electrical appliances. When the conductive device 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 resultant field, thereby reducing the radiation at the cable connection and effectively reducing the magnetic field generated by the cable core, minimizing the impact on other electrical appliances.

[0017] As an example, the connection position of the first end of the conductive device and the free end of the first shielding layer is 360° connected, and the connection position of the second end of the conductive device and the free end of the second shielding layer is 360° connected.

[0018] Compared with the symmetrical setting of the connection position between the conductive device and the shielding layer, the connection position between the conductive device and the shielding layer is a 360° connection setting, 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.

[0019] When the free end of the first shielding layer and the free end of the second shielding layer are connected via a conductive device, the conductive device and the first shielding layer can be connected by a butt joint or an overlap joint. Accordingly, the conductive device and the second shielding layer can be connected by a butt joint or an overlap joint to improve the connection between the first and second shielding layers and the conductive device.

[0020] In addition, in order to improve the connection strength between the conductive device and the first shielding layer, welding can also be used to achieve a fixed connection between the conductive device and the first shielding layer. Correspondingly, in order to improve the connection strength between the conductive device and the second shielding layer, welding can also be used to achieve a fixed connection between the conductive device and the second shielding layer.

[0021] As an example, an insulating protective layer can be provided around the first shielding layer, the second shielding layer and the conductive device to improve the insulation reliability of the cable assembly and prevent conductive contact between the first shielding layer, the second shielding layer and the conductive device and external conductors.

[0022] As an example, the first cable core has a section extending out of the first protective layer, and the second cable core has a section extending out of the second protective layer, so as to facilitate electrical connection between the first cable core and the second cable core.

[0023] As an example, in order to provide good insulation protection for the connection between the first cable core and the second cable core, an isolation sleeve is further provided on the outside of the connection between the first cable core and the second cable core. The isolation sleeve can be provided on the periphery of the extended section of the first cable core and the extended section of the second cable core.

[0024] As an example, the thickness of the insulating sleeve is greater than at least one of the thickness of the first protective layer or the thickness of the second protective layer.

[0025] As an example, one end of the isolation sleeve may be connected to the first protective layer, and the other end may be connected to the second protective layer, thereby forming a sealed protection effect on the first cable core and the second cable core.

[0026] As an example, the free end of the first cable core and the free end of the second cable core may be connected in a butt-jointed or overlapped manner.

[0027] For example, the end face of the free end of the first cable core is butted against the end face of the free end of the second cable core. In a specific implementation, to ensure the stability of the connection between the first cable core and the second cable core, the end face of the free end of the first cable core and the end face of the free end of the second cable core can be welded using laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing. The specific welding process is not limited in this application.

[0028] In addition, the free end of the first cable core and the free end of the second cable core may also have an overlapping area to form a lap joint. In a specific implementation, in order to ensure the connection stability between the first cable core and the second cable core, the free end of the first cable core and the free end of the second cable core (i.e., the overlapping area of ​​the first cable core and the second cable core) can be welded by laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing. The specific welding process is not limited in this application.

[0029] As an example, the minimum cross-sectional area at the joint or butt joint between the first and second cable cores can be greater than or equal to the minimum cross-sectional area of ​​either the first or second cable cores. This avoids excessive cable resistance due to a small cross-sectional area at the joint or butt joint between the first and second cable cores, which can lead to a temperature rise exceeding standard requirements when current is passed.

[0030] As an example, the thickness of the first shielding layer, the second shielding layer and the conductive device may be between 0.003 mm and 27 mm.

[0031] As an example, the minimum cross-sectional area at the location where the free end of the first shielding layer overlaps or butts with the free end of the second shielding layer is 60%-260% of the minimum cross-sectional area of ​​the first shielding layer and the second shielding layer, thereby ensuring a good connection between the free end of the first shielding layer and the free end of the second shielding layer.

[0032] As an example, the minimum cross-sectional area of ​​the conductive device at the overlap or docking position with the first shielding layer or the second shielding layer is 60%-260% of the minimum cross-sectional area of ​​the first shielding layer or the second shielding layer, thereby ensuring the connection effect between the conductive device and the first shielding layer or the second shielding layer.

[0033] As an example, the impedance of the connection location between the first shielding layer and the second shielding layer is less than 13.7 mΩ.

[0034] As a preferred example, the impedance of the connection position between the first shielding layer and the second shielding layer is less than 12.5 mΩ.

[0035] As an example, the impedance of the connection point between the first end of the conductive device and the free end of 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 free end of the second shielding layer is less than 13.7 mΩ.

[0036] As a preferred example, the impedance of the connection point between the first end of the conductive device and the free end of 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 free end of the second shielding layer is less than 12.5 mΩ.

[0037] The impedance of the connection position between the first shielding layer and the second shielding layer, as well as the impedance of the connection position 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 the grounding position without hindrance. If the impedance of the connection position between the first shielding layer and the second shielding layer, as well as the impedance of the connection position between the conductive device and the shielding layer are large, a large current will be generated at the connection position between the first shielding layer and the second shielding layer, as well as the connection position between the conductive device and the shielding layer, thereby causing greater radiation at the cable connection.

[0038] 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 disposed outside the first shielding layer, and the fourth protective layer is disposed outside the second shielding layer. The third protective layer effectively improves the safety and structural strength of the first cable; correspondingly, the fourth protective layer effectively improves the safety and structural strength of the second cable.

[0039] On the other hand, the present invention also provides a method for preparing a cable assembly, comprising:

[0040] Providing a first cable, the first cable comprising a first cable core, a first protective layer and a first shielding layer, wherein the first protective layer is arranged on the outside of the first cable core, and the first shielding layer is arranged on the outside of the first protective layer;

[0041] Stripping a first shielding layer and a first protective layer of a first end of a first cable to expose a first cable core;

[0042] Providing a second cable, the second cable comprising a second cable core, a second protective layer, and a second shielding layer, wherein the second protective layer is disposed on the outside of the second cable core, and the second shielding layer is disposed on the outside of the second protective layer;

[0043] Stripping the second shielding layer and the second protective layer of the first end of the second cable to expose the second cable core;

[0044] Connecting the free end of the first cable core to the free end of the second cable core;

[0045] Connect the free end of the first shielding layer to the free end of the second shielding layer.

[0046] As an example, connecting the free end of the first cable core with the free end of the second cable core specifically includes:

[0047] The free end of the first cable core is connected to the free end of the second cable core by welding or crimping.

[0048] As an example, electrically connecting the free end of the first shielding layer with the free end of the second shielding layer specifically includes:

[0049] The free end of the first shielding layer is connected to the free end of the second shielding layer by using a welding process.

[0050] As an example, connecting the free end of the first shielding layer with the free end of the second shielding layer specifically includes:

[0051] A conductive device is provided and arranged on a portion of the periphery of the first cable core and the second cable core; a first end of the conductive device is connected to the free end of the first shielding layer and a second end of the conductive device is connected to the free end of the second shielding layer by a welding process.

[0052] As an example, before disposing the first end of the conductive device on the periphery of the first cable core and disposing the second end of the conductive device on the periphery of the second cable core, the method further includes:

[0053] An isolation sleeve is provided at the periphery of the connection between the first cable core and the second cable core. The beneficial effects of the embodiment of the present invention are:

[0054] In the cable assembly provided by the present invention, the first shielding layer and the second shielding layer can be connected by direct connection or by means of a conductive device, thereby having high flexibility and convenience. In addition, the electromagnetic shielding continuity between the first shielding layer and the second shielding layer can also be effectively ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic cross-sectional view of a cable assembly according to an embodiment of the present invention;

[0056] FIG2 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0057] FIG3 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0058] FIG4 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0059] FIG5 is a schematic cross-sectional view of another cable assembly provided by an embodiment of the present invention;

[0060] FIG6 is a schematic diagram of a planar structure of a symmetrically connected shielding layer provided by an embodiment of the present invention;

[0061] FIG7 is a schematic diagram of a three-dimensional structure of a symmetrically connected shielding layer provided by an embodiment of the present invention;

[0062] FIG8 is a schematic diagram of a planar structure of an asymmetrical connection arrangement of shielding layers provided by an embodiment of the present invention;

[0063] FIG9 is a schematic diagram of a three-dimensional structure of an asymmetrical connection arrangement of shielding layers provided by an embodiment of the present invention;

[0064] FIG10 is a flow chart of a method for preparing a cable assembly according to an embodiment of the present invention;

[0065] FIG11 is a flow chart of another method for preparing a cable assembly provided in an embodiment of the present invention.

[0066] Reference numerals:

[0067] 10-first cable; 11-first cable core; 12-first protective layer; 13-first shielding layer; 14-third protective layer; 20-second cable; 21-second cable core; 22-second protective layer; 23-second shielding layer; 24-fourth protective layer; 30-isolating sleeve; 31-conductive device; 32-insulating protective layer. DETAILED DESCRIPTION

[0068] 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.

[0069] Example 1:

[0070] This embodiment provides a solution for directly connecting cable shielding nets.

[0071] As shown in Figure 1, an embodiment of the present invention provides a cable assembly, including: a first cable 10 and a second cable 20. The electromagnetic shielding structures in the first cable 10 and the second cable 20 are electrically connected, thereby achieving continuity of the electromagnetic shielding structure between the first cable 10 and the second cable 20, thereby effectively improving the electromagnetic shielding effect of the cable assembly.

[0072] Specifically, in the embodiment provided by the present invention, the first cable 10 includes a first cable core 11 and a first shielding layer 13 . The periphery of the first cable core 11 is covered with a first protective layer 12 , and the first shielding layer 13 is arranged on the outside of the first protective layer 12 .

[0073] The main function of the first cable core 11 is to realize the transmission of electric energy. In specific configuration, the first cable core 11 can be made of materials with good electrical conductivity such as copper and aluminum.

[0074] The first protective layer 12 is wrapped around the outside of the first cable core 11, thereby providing good protection for the first cable core 11. In a specific configuration, the first protective layer 12 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 11.

[0075] The first shielding layer 13 is disposed outside the first protective layer 12 and is used to provide electromagnetic shielding for the first cable core 11. When current flows through the first cable core 11, an electromagnetic signal is generated. The first shielding layer 13 can shield this electromagnetic signal, thereby preventing it from being transmitted to the external environment. In a specific configuration, the first shielding layer 13 can be woven from metal wire to provide good flexibility.

[0076] The second cable 20 includes a second cable core 21 and a second shielding layer 23 . The outer periphery of the second cable core 21 is covered with a second protective layer 22 . The second shielding layer 23 is arranged on the outer side of the second protective layer 22 .

[0077] The second cable core 21 mainly functions to transmit electrical energy. In specific configuration, the second cable core 21 can be made of materials with good electrical conductivity, such as copper and aluminum.

[0078] The second protective layer 22 is wrapped around the outside of the second cable core 21, thereby providing good protection for the second cable core 21. In a specific configuration, the second protective layer 22 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 21.

[0079] The second shielding layer 23 is disposed outside the second protective layer 22 and is used to provide electromagnetic shielding for the second cable core 21. When current flows through the second cable core 21, an electromagnetic signal is generated. The second shielding layer 23 can shield this electromagnetic signal, thereby preventing it from being transmitted to the external environment. In a specific configuration, the second shielding layer 23 can be woven from metal wire to provide good flexibility.

[0080] The free end of the first cable core 11 is connected to the free end of the second cable core 21, thereby achieving electrical connection between the first cable core 11 and the second cable core 21. The free end of the first shielding layer 13 is connected to the free end of the second shielding layer 23, thereby achieving electrical connection between the shielding layers of the first cable 10 and the second cable 20, ensuring the continuity of the electromagnetic shielding structure of the cable assembly, and effectively improving the electromagnetic shielding effect of the cable assembly.

[0081] Please refer to Figure 1, Figure 6 and Figure 7. The connection positions of the first shielding layer 13 and the second shielding layer 23 are symmetrically connected.

[0082] Please refer to Figures 8 and 9. If the connection between the first shielding layer 13 and the second shielding layer 23 is a single-point connection, a large current will flow through the connection, 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 working state of other electrical appliances. When the connection between the first shielding layer 13 and the second shielding layer 23 is symmetrical, 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.

[0083] The connection position between the first shielding layer 13 and the second shielding layer 23 is a 360° connection setting.

[0084] The connection position of the first shielding layer 13 and the second shielding layer 23 is symmetrically arranged, and the connection position of the first shielding layer 13 and the second shielding layer 23 is a 360° connection arrangement, which is reflected in that the first shielding layer 13 completely wraps the first cable core 11 in the radial direction, and the second shielding layer 23 completely wraps the second cable core 21 in the radial direction. At this time, the radial outer periphery of the cable core is completely wrapped by the shielding layer, which has a great shielding and offsetting effect on the radiation generated by the cable core of the cable and the radiation generated by the shielding layer itself, thereby optimizing the anti-shielding effect at the cable connection.

[0085] The test method is as follows: The test instrument outputs a signal value (test value 2) for the first cable 10 or the second cable 20. 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.

[0086] Table 1 The influence of the connection position of the first shielding layer and the second shielding layer on the shielding performance.

[0087]

[0088] Table 1

[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 first and second shielding layers be greater than 60dB.

[0090] When the connection point between the first shielding layer 13 and the second shielding layer 23 is the same size and is asymmetrically arranged, the shielding performance value at the connection point between the first shielding layer 13 and the second shielding layer 23 is less than 60dB, which does not meet the standard requirements. When arranged symmetrically, even if the connection is incomplete, the shielding performance value at the connection point between the first shielding layer 13 and the second shielding layer 23 still meets the standard requirements because electromagnetic radiation is offset. Preferably, when the connection point between the first shielding layer 13 and the second shielding layer 23 is a 360° connection, the shielding performance of the cable connection point is further improved.

[0091] In a specific implementation, the free end of the first shielding layer 13 is overlapped or butted with the free end of the second shielding layer 23 .

[0092] Please continue to refer to Figure 1. In one embodiment of the present invention, the free end of the first shielding layer 13 and the free end of the second shielding layer 23 are connected in a butt-jointed manner.

[0093] Specifically, the free end of the first shielding layer 13 (the right end in the figure) has an outward-turned portion, and the free end of the second shielding layer 23 (the left end in the figure) also has an outward-turned portion. The outward-turned portion of the first shielding layer 13 is butted against the outward-turned portion of the second shielding layer 23 to achieve a connection between the first and second shielding layers 13, 23.

[0094] To ensure the stability of the connection between the first shielding layer 13 and the second shielding layer 23, the outward-turned portion of the first shielding layer 13 and the outward-turned portion of the second shielding layer 23 can be fixedly connected by welding. For example, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing can be used. The specific welding process is not limited in this application.

[0095] Alternatively, as shown in FIG. 2 , the first shielding layer 13 and the second shielding layer 23 may also be connected in an overlapping manner.

[0096] Specifically, the free end of the first shielding layer 13 may be disposed at the periphery of the free end of the second shielding layer 23 , thereby achieving overlap between the first shielding layer 13 and the second shielding layer 23 .

[0097] To ensure the stability of the connection between the first shielding layer 13 and the second shielding layer 23, the overlapping portions of the first shielding layer 13 and the second shielding layer 23 can be fixedly connected by welding. For example, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing can be used. The specific welding process is not limited in this application.

[0098] In addition, an insulating protective layer 32 may be provided around the first and second shielding layers 13, 23 to enhance the insulation reliability of the cable assembly and prevent conductive contact between the first and second shielding layers 13, 23 and external conductors. In a specific configuration, the insulating protective layer 32 may be a heat-shrink tubing or other structural member with good insulation properties. The specific material and type of the insulating sleeve may be selected based on actual needs and are not specifically limited in this application.

[0099] In a specific configuration, the first cable core 11 has a section extending out of the first protective layer 12, and the second cable core 21 has a section extending out of the second protective layer 22. This facilitates electrical connection between the first cable core 11 and the second cable core 21.

[0100] In addition, in order to provide good protection for the connection between the first cable core 11 and the second cable core 21, in the embodiment provided by the present invention, an isolation sleeve 30 is further provided on the outside of the connection between the first cable core 11 and the second cable core 21. The isolation sleeve 30 can be provided on the periphery of the extended section of the first cable core 11 and the extended section of the second cable core 21.

[0101] In a specific configuration, the thickness of the isolation sleeve 30 is greater than at least one of the thickness of the first protective layer 12 or the thickness of the second protective layer 22 .

[0102] In specific configuration, the isolation sleeve 30 can be a heat shrink tube, or it can be 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, which are injection molded on the outside of the joint.

[0103] The left end of the isolation sleeve 30 can be connected to the first protective layer 12 of the first cable 10, and the right end of the isolation sleeve 30 can be connected to the second protective layer 22 of the second cable 20, so as to provide good protection for the first cable core 11 and the second cable core 21.

[0104] In specific configuration, the free end of the first cable core 11 and the free end of the second cable core 21 can be connected in a butt-jointed or overlapped manner.

[0105] For example, as shown in Figures 1 and 2, the end face of the free end of the first cable core 11 is butted against the end face of the free end of the second cable core 21. In a specific implementation, to ensure the stability of the connection between the first cable core 11 and the second cable core 21, the end face of the free end of the first cable core 11 and the end face of the free end of the second cable core 21 can be connected by laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, brazing, or crimping. The specific welding or crimping process is not limited in this application.

[0106] As shown in Figure 3, the free end of the first cable core 11 and the free end of the second cable core 21 can also be overlapped. That is, the right end of the first cable core 11 and the left end of the second cable core 21 have an overlapping area. In specific implementation, in order to ensure the connection stability between the first cable core 11 and the second cable core 21, the free end of the first cable core 11 and the free end of the second cable core 21 (that is, the overlapping area of ​​the first cable core 11 and the second cable core 21) can be welded by laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, brazing or crimping. The specific welding or crimping process is not limited in this application.

[0107] Among them, the minimum cross-sectional area of ​​the overlap or docking position of the first cable core 11 and the second cable core 21 can be greater than or equal to the minimum cross-sectional area of ​​the first cable core 11 or the second cable core 21, 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 requirement when current is passed.

[0108] The thickness of the first shielding layer 13 and the second shielding layer 23 may be between 0.003 mm and 27 mm.

[0109] The test method is as follows: The test instrument outputs a signal value (test value 2) for the first cable 10 or the second cable 20. 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.

[0110] Table 2 Effect of shielding layer and conductive device thickness on shielding performance and increase in bending radius.

[0111]

[0112]

[0113] Table 2

[0114] As shown in the table above, the test data of a cable with a certain wire diameter is selected. Among them, the standard requires that the shielding performance value at the connection point between the conductive device 31 and the shielding layer is greater than 60dB.

[0115] The test results shown in the table indicate that when the thickness of the first shielding layer 13 and the second shielding layer 23 is between 0.003 mm and 27 mm, the shielding performance of the first cable 10 and the second cable 20 increases with increasing thickness. However, when the thickness of the first shielding layer 13 and the second shielding layer 23 exceeds 27 mm, the shielding performance of the first cable 10 and the second cable 20 changes slightly, with no significant improvement. When the thickness of the first shielding layer 13 and the second shielding layer 23 is between 0.003 mm and 27 mm, the increase in the turning radius of the first cable 10 and the second cable 20 increases with increasing thickness. However, when the thickness of the first shielding layer 13 and the second shielding layer exceeds 27 mm, the increase in the turning radius of the first cable 10 and the second cable 20 exceeds 200 mm, which is not conducive to practical processing. Therefore, the thickness of the first shielding layer 13 and the second shielding layer 23 is preferably between 0.003 mm and 27 mm.

[0116] In addition, the minimum cross-sectional area of ​​the overlapped or butted position between the free end of the first shielding layer 13 and the free end of the second shielding layer 23 is 60% to 260% of the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23. This ensures the connection between the free end of the first shielding layer 13 and the free end of the second shielding layer 23.

[0117] The primary function of the first and second shielding layers 13, 23 is to ground eddy currents generated by the current flowing through the cable core, thereby preventing electromagnetic interference. The larger the cross-sectional area of ​​the cable core, the greater the current it can conduct, and thus the greater the eddy currents generated within the shielding layers. If the minimum cross-sectional area at the connection between the first and second shielding layers 13, 23 is less than the standard requirement, localized heating will occur at the connection. In severe cases, the connection between the first and second shielding layers 13, 23 may burn, causing the cable shielding performance to degrade or even fail.

[0118] Table 3 Effect of the ratio of the minimum cross-sectional area at the connection position of the first shielding layer and the second shielding layer to the minimum cross-sectional area of ​​the first shielding layer and the second shielding layer on the temperature rise between the shielding layers.

[0119]

[0120] Table 3

[0121] As shown in the table above, the test data of a cable with a certain wire diameter is selected. The standard requires that the temperature rise between the first shielding layer 13 and the second shielding layer 23 be less than 50°C.

[0122] It can be seen from the above table that when the ratio of the minimum cross-sectional area at the connection position of the first shielding layer 13 and the second shielding layer 23 to the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 is less than 60%, the temperature rise between the shielding layers does not meet the standard requirements.

[0123] When the ratio of the minimum cross-sectional area at the connection position of the first shielding layer 13 and the second shielding layer 23 to the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 is greater than 260%, at this time, since the cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 is already much larger than the minimum conduction area of ​​the eddy current, the temperature rise value between the first shielding layer 13 and the second shielding layer 23 is basically the same as when the ratio is 260%, but the cost and processing cycle are higher.

[0124] Therefore, it is preferred that the minimum cross-sectional area of ​​the overlapped or butted position between the free ends of the first shielding layer 13 and the second shielding layer 23 is 60%-260% of the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 .

[0125] In a specific configuration, the impedance at the connection position between the first shielding layer 13 and the second shielding layer 23 is less than 13.7 mΩ.

[0126] As a preferred embodiment, the impedance at the connection point between the first shielding layer 13 and the second shielding layer 23 is less than 12.5 mΩ.

[0127] The impedance of the connection position of the first shielding layer 13 and the second shielding layer 23 should be as small as possible so that the current generated by the shielding layer can flow back to the energy source or the grounding position without hindrance. If the impedance of the connection position of the first shielding layer 13 and the second shielding layer 23 is large, a large current will be generated at the connection position of the first shielding layer 13 and the second shielding layer 23, thereby causing greater radiation at the cable connection.

[0128] Table 4 Influence of impedance at the connection position of the first shielding layer and the second shielding layer on shielding performance.

[0129]

[0130] Table 4

[0131] As shown in the table above, the test data for a cable with a certain wire diameter is selected. The standard requires that the shielding performance value at the connection point between the first shielding layer 13 and the second shielding layer 23 be less than 6dB, and the shielding performance value at the connection point between the first shielding layer 13 and the second shielding layer 23 be less than 4dB.

[0132] When the impedance at the connection point between the first and second shielding layers 13, 23 is greater than 13.7 mΩ, the shielding performance value at the connection point between the first and second shielding layers 13, 23 is greater than 6 dB, and the radio frequency interference resistance at the connection point between the first and second shielding layers 13, 23 is greater than 4 dB, which does not meet the standard requirements. Furthermore, when the impedance at the connection point between the first and second shielding layers 13, 23 is less than 12.5 mΩ, the shielding performance at the connection point between the first and second shielding layers 13, 23 and the shielding performance at the connection point between the first and second shielding layers 13, 23 do not change much. Therefore, the impedance at the connection point between the first and second shielding layers 13, 23 is set to less than 13.7 mΩ.

[0133] As a preferred embodiment, the impedance at the connection point between the first shielding layer 13 and the second shielding layer 23 is less than 12.5 mΩ.

[0134] In actual applications, the first cable 10 may further include a third protective layer 14 (also known as an outer sheath); the second cable 20 may further include a fourth protective layer 24 (also known as an outer sheath).

[0135] Specifically, the third protective layer 14 is arranged on the outside of the first shielding layer 13 to prevent the first shielding layer 13 from generating conductive contact with other components, thereby improving the safety of the first cable 10 and improving the overall waterproof and dustproof properties of the first cable 10.

[0136] In a specific implementation, the third protective layer 14 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.

[0137] Correspondingly, in the second cable 20, the fourth protective layer 24 is arranged on the outside of the second shielding layer 23 to prevent the second shielding layer 23 from making conductive contact with other components, thereby improving the safety of the second cable 20. In addition, it can also improve the overall waterproof and dustproof properties of the second cable 20.

[0138] In a specific implementation, the fourth protective layer 24 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.

[0139] Example 2:

[0140] This embodiment provides a solution in which cable shielding nets are connected via a conductive device.

[0141] In this embodiment, the first shielding layer 13 and the second shielding layer 23 may also be connected via an additional conductive device 31 .

[0142] The cable assembly further includes a conductive device 31, which is disposed partially around the first cable core 11 and the second cable core 21. One end of the conductive device 31 is connected to the free end of the first shielding layer 13, and the second end of the conductive device 31 is connected to the free end of the second shielding layer 23. When the connection length between the first shielding layer 13 and the second shielding layer 23 is insufficient, the conductive device 31 can be used to provide a transitional connection while also ensuring the shielding effect at the connection location.

[0143] The connection positions of one end of the conductive device 31 and the free end of the first shielding layer 13 are symmetrically arranged, and the connection positions of the second end of the conductive device 31 and the free end of the second shielding layer 23 are symmetrically arranged.

[0144] If the conductive device 31 and the shielding layer are connected at a single point, a large current will flow through the connection, 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 devices. When the conductive device 31 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 resulting field, thereby reducing radiation from the cable connection and effectively reducing the magnetic field generated by the cable core, minimizing the impact on other electrical devices.

[0145] The first end of the conductive device 31 and the free end of the first shielding layer 13 are connected at a 360-degree angle. That is, the first end of the conductive device 31 and the free end of the first shielding layer 13 are completely aligned. The second end of the conductive device 31 and the free end of the second shielding layer 23 are connected at a 360-degree angle. That is, the second end of the conductive device 31 and the free end of the second shielding layer 23 are completely aligned.

[0146] The connection position between the conductive device 31 and the shielding layer is symmetrically arranged, and the connection position between the conductive device 31 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.

[0147] The test method is as follows: The test instrument outputs a signal value (test value 2) for the first cable 10 or the second cable 20. 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.

[0148] Table 5 The influence of the connection position of the conductive device and the shielding layer on the shielding performance.

[0149]

[0150] Table 5

[0151] 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.

[0152] When the conductive device 31 and the shielding layer are connected at the same dimensions, but are not symmetrically arranged, the shielding performance value at the connection point between the conductive device 31 and the shielding layer is less than 60dB, which does not meet the standard requirements. When arranged symmetrically, even if the connection is not complete, the shielding performance value at the connection point between the conductive device 31 and the shielding layer still meets the standard requirements because electromagnetic radiation is offset. Preferably, when the conductive device 31 and the shielding layer are connected at a 360-degree angle, the shielding performance of the cable connection point is further improved.

[0153] When the free end of the first shielding layer 13 and the free end of the second shielding layer 23 are connected via the conductive device 31, the conductive device 31 and the first shielding layer 13 can be connected by a butt joint or an overlap joint. Correspondingly, the conductive device 31 and the second shielding layer 23 can be connected by a butt joint or an overlap joint, thereby improving the connection between the first shielding layer 13 and the second shielding layer 23.

[0154] The first end of the conductive device 31 is connected to the free end of the first shielding layer 13, or the second end of the conductive device 31 is connected to the free end of the second shielding layer 23. Both can refer to the above-mentioned connection method of the first shielding layer 13 and the second shielding layer 23, and can be welded by laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing.

[0155] In addition, during specific implementation, an insulating protective layer 32 may also be provided at the location where the first shielding layer 13, the conductive device 31, and the second shielding layer 23 are connected, as well as on the periphery of the conductive device 31. The left end of the insulating protective layer 32 may be docked or sleeved with the third protective layer 14 of the first cable 10. The right end of the insulating protective layer 32 may be docked or sleeved with the fourth protective layer 24 of the second cable 20 to improve the reliability of the cable assembly and to generate conductive contact between the first shielding layer 13, the conductive device 31, and the second shielding layer 23 and external conductors. In specific configuration, the insulating protective layer 32 may be a structural member with good insulation properties, such as a heat shrink tubing. The specific material and type of the insulating protective layer 32 may be adaptively selected according to actual needs, and this application does not impose specific limitations on this.

[0156] For example, as shown in FIG. 4 , in another embodiment provided by the present invention, the first shielding layer 13 and the second shielding layer 23 are connected via a conductive device 31 .

[0157] During connection, the first shielding layer 13 and the conductive device 31 may be connected in a butt-jointed manner; the second shielding layer 23 and the conductive device 31 may also be connected in a butt-jointed manner.

[0158] Specifically, the free end of the first shielding layer 13 has an outward-turned portion, and the first end (left end in the figure) of the conductive device 31 also has an outward-turned portion. The outward-turned portion of the first shielding layer 13 is mated with the outward-turned portion of the left end of the conductive device 31 to establish a connection between the first shielding layer 13 and the conductive device 31. The free end of the second shielding layer 23 has an outward-turned portion, and the second end (right end in the figure) of the conductive device 31 also has an outward-turned portion. The outward-turned portion of the second shielding layer 23 is mated with the outward-turned portion of the right end of the conductive device 31 to establish a connection between the second shielding layer 23 and the conductive device 31.

[0159] In order to ensure the connection stability between the first shielding layer 13 and the conductive device 31, the outward-turned part of the first shielding layer 13 and the outward-turned part of the conductive device 31 can be fixedly connected by welding. For example, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing can be used for welding. The specific welding process is not limited in this application. In addition, in order to ensure the connection stability between the second shielding layer 23 and the conductive device 31, the outward-turned part of the second shielding layer 23 and the outward-turned part of the conductive device 31 can be fixedly connected by welding. For example, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing can be used for welding. The specific welding process is not limited in this application.

[0160] Alternatively, as shown in FIG5 , the first shielding layer 13 and the conductive device 31 may be connected in an overlapping manner; the second shielding layer 23 and the conductive device 31 may also be connected in an overlapping manner.

[0161] Specifically, the free end of the first shielding layer 13 can be disposed outside the left end of the conductive device 31, thereby achieving overlap between the first shielding layer 13 and the conductive device 31. The free end of the second shielding layer 23 can be disposed outside the right end of the conductive device 31, thereby achieving overlap between the second shielding layer 23 and the conductive device 31.

[0162] In order to ensure the connection stability between the first shielding layer 13 and the conductive device 31, the overlapping portion of the first shielding layer 13 and the conductive device 31 can be fixedly connected by welding. For example, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing can be used for welding. The specific welding process is not limited in this application. In addition, in order to ensure the connection stability between the second shielding layer 23 and the conductive device 31, the overlapping portion of the second shielding layer 23 and the conductive device 31 can be fixedly connected by welding. For example, laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing can be used for welding. The specific welding process is not limited in this application.

[0163] The thickness of the first shielding layer 13 , the second shielding layer 23 and the conductive device 31 may be between 0.003 mm and 27 mm.

[0164] As shown in Table 1. The test results shown in the table indicate that when the thickness of the first shielding layer 13, the second shielding layer 23, and the conductive device 31 is between 0.003 mm and 27 mm, the shielding effect, i.e., the shielding performance, of the first cable 10 and the second cable 20 increases with increasing thickness. However, when the thickness of the first shielding layer 13, the second shielding layer 23, and the conductive device 31 exceeds 27 mm, the shielding capability of the first cable 10 and the second cable 20 changes little, with no significant improvement. When the thickness of the first shielding layer 13, the second shielding layer 23, and the conductive device 31 is between 0.003 mm and 27 mm, the increase in the turning radius of the first cable 10 and the second cable 20 increases with increasing thickness. However, when the thickness of the first shielding layer 13, the second shielding layer 23, and the conductive device 31 exceeds 27 mm, the increase in the turning radius of the first cable 10 and the second cable 20 exceeds 200 mm, which is not conducive to practical processing. Therefore, the preferred thickness of the first shielding layer 13, the second shielding layer 23, and the conductive device 31 is 0.003 mm to 27 mm.

[0165] In addition, the minimum cross-sectional area of ​​the overlapping or docking position of the conductive device 31 and the first shielding layer 13 or the second shielding layer 23 is 60%-260% of the minimum cross-sectional area of ​​the first shielding layer 13 or the second shielding layer 23. This ensures the connection between the conductive device 31 and the first shielding layer 13 or the second shielding layer 23.

[0166] The primary function of the first and second shielding layers 13, 23 is to ground the eddy currents generated by the current flowing through the cable core, thereby preventing electromagnetic interference. The larger the cross-sectional area of ​​the cable core, the greater the current it can conduct, and thus the greater the eddy currents generated within the shielding layers. When the minimum cross-sectional area at the connection between the conductive device 31 and the first or second shielding layer 13, 23 is less than the standard requirement, localized heating will occur at the cable connection. In severe cases, the connection between the conductive device 31 and the first or second shielding layer 13, 23 may burn, resulting in a decrease in shielding performance or even failure.

[0167] Table 6 Influence of the ratio of the minimum cross-sectional area of ​​the connection position between the conductive device and the first shielding layer or the second shielding layer to the minimum cross-sectional area in the first shielding layer or the second shielding layer on the temperature rise between the conductive device and the first shielding layer or the second shielding layer.

[0168]

[0169] Table 6

[0170] As shown in the table above, the test data of a cable with a certain wire diameter is selected. The standard requires that the temperature rise between the conductive device and the first shielding layer 13 and the second shielding layer 23 be less than 50°C.

[0171] It can be seen from the above table that when the ratio of the minimum cross-sectional area of ​​the connection position between the conductive device 31 and the first shielding layer 13 or the second shielding layer 23 to the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 is less than 60%, the temperature rise between the conductive device 31 and the first shielding layer 13 or the second shielding layer 23 does not meet the standard requirements.

[0172] When the ratio of the minimum cross-sectional area of ​​the connection position between the conductive device 31 and the first shielding layer 13 or the second shielding layer 23 to the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 is greater than 260%, at this time, since the cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 is already much larger than the minimum conduction area of ​​the eddy current, the temperature rise value between the conductive device 31 and the first shielding layer 13 or the second shielding layer 23 is basically the same as when the ratio is 260%, but the cost and processing cycle are higher.

[0173] Therefore, it is preferred that the minimum cross-sectional area of ​​the overlapping or docking position between the conductive device 31 and the first shielding layer 13 or the second shielding layer 23 is 60%-260% of the minimum cross-sectional area of ​​the first shielding layer 13 and the second shielding layer 23 .

[0174] In a specific configuration, the impedance of the connection position between one end of the conductive device and the free end of the first shielding layer is less than 13.7 mΩ, and the impedance of the connection position between the second end of the conductive device and the free end of the second shielding layer is less than 13.7 mΩ.

[0175] Preferably, the impedance of the connection between one end of the conductive device and the free end of the first shielding layer is less than 12.5 mΩ, and the impedance of the connection between the second end of the conductive device and the free end of the second shielding layer is less than 12.5 mΩ.

[0176] 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.

[0177] 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.

[0178] Table 7 Effect of impedance at the connection point between the conductive device and the shielding layer on shielding performance.

[0179]

[0180] Table 7

[0181] 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.

[0182] When the impedance at the connection point between one end of the conductive device and the free end of 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 free end of 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 one end of the conductive device and the free end of 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 free end of 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 one end of the conductive device and the free end of 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 free end of the second shielding layer to be less than 13.7 mΩ.

[0183] Preferably, the impedance of the connection between one end of the conductive device and the free end of the first shielding layer is less than 12.5 mΩ, and the impedance of the connection between the second end of the conductive device and the free end of the second shielding layer is less than 12.5 mΩ.

[0184] In actual applications, the first cable 10 may further include a third protective layer 14 (also known as an outer sheath); the second cable 20 may further include a fourth protective layer 24 (also known as an outer sheath).

[0185] Specifically, the third protective layer 14 is arranged on the outside of the first shielding layer 13 to prevent the first shielding layer 13 from generating conductive contact with other components, thereby improving the safety of the first cable 10 and improving the overall waterproof and dustproof properties of the first cable 10.

[0186] In a specific implementation, the third protective layer 14 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.

[0187] Correspondingly, in the second cable 20, the fourth protective layer 24 is arranged on the outside of the second shielding layer 23 to prevent the second shielding layer 23 from making conductive contact with other components, thereby improving the safety of the second cable 20. In addition, it can also improve the overall waterproof and dustproof properties of the second cable 20.

[0188] In a specific implementation, the fourth protective layer 24 can be made of one or more of polyvinyl chloride, polyurethane, nylon, polypropylene, silicone rubber, cross-linked polyolefin, synthetic rubber, polyurethane elastomer, cross-linked polyethylene, polyethylene, etc.

[0189] During fabrication, the conductive device 31 can be a tubular structure made of a conductive material such as copper, aluminum, or graphene. Alternatively, the conductive device 31 can be a tubular structure woven from metal wires to provide a certain degree of flexibility, thereby enhancing its application range and seismic resistance. The present invention does not limit the material and fabrication method of the conductive device 31.

[0190] Example 3:

[0191] This embodiment provides a method for preparing a cable assembly.

[0192] When preparing the cable assembly, the following steps can be taken:

[0193] Referring to FIG. 1 , FIG. 2 and FIG. 10 , the method may include:

[0194] S10 , providing a first cable 10 , wherein the first cable 10 includes a first cable core 11 , a first protective layer 12 , and a first shielding layer 13 , wherein the first protective layer 12 is disposed outside the first cable core 11 , and the first shielding layer 13 is disposed outside the first protective layer 12 .

[0195] S11 . Peel off the first shielding layer 13 and the first protective layer 12 of the free end of the first cable 10 (the right end of the first cable 10 in FIG. 1 ) to expose the first cable core 11 .

[0196] S20 , providing a second cable 20 , wherein the second cable 20 includes a second cable core 21 , a second protective layer 22 , and a second shielding layer 23 , wherein the second protective layer 22 is disposed outside the second cable core 21 , and the second shielding layer 23 is disposed outside the second protective layer 22 .

[0197] S21 . Peel off the second shielding layer 23 and the second protective layer 22 of the free end of the second cable 20 (the left end of the second cable 20 in FIG. 1 ) to expose the second cable core 21 .

[0198] S22 . Connect the free end of the first cable core 11 with the free end of the second cable core 21 to achieve electrical connection between the first cable core 11 and the second cable core 21 .

[0199] S23 , connecting the free end of the first shielding layer 13 and the free end of the second shielding layer 23 .

[0200] The first cable core 11 and the second cable core 21 may be connected by laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, brazing or crimping to improve the connection strength between the first cable core 11 and the second cable core 21 .

[0201] In addition, the first shielding layer 13 and the second shielding layer 23 may be connected by laser welding, ultrasonic welding, resistance welding, pressure diffusion welding or brazing, etc., so as to improve the connection strength between the first shielding layer 13 and the second shielding layer 23 .

[0202] It is understandable that, in a specific implementation, other methods may be used to connect the first cable core 11 and the second cable core 21 to achieve a conductive connection and a mechanical connection between the first cable core 11 and the second cable core 21. In addition, other methods may be used to connect the first shielding layer 13 and the second shielding layer 23 to achieve a conductive connection and a mechanical connection between the first shielding layer 13 and the second shielding layer 23.

[0203] In addition, before step S23 , the method may further include: providing an isolation sleeve 30 around the connection between the first cable core 11 and the second cable core 21 to prevent conductive contact between the connection and the conductive device 31 .

[0204] The isolation sleeve 30 may be a heat shrink tube or other insulating layer directly injection-molded on the outside of the connection.

[0205] In addition, in some embodiments, when the outer side of the first cable 10 has a third protective layer 14, when performing step S11, the step also includes peeling off the third protective layer 14 of the first cable 10. Correspondingly, when the outer side of the second cable 20 has a fourth protective layer 24, when performing step S21, the step also includes peeling off the fourth protective layer 24 of the second cable 20.

[0206] In addition, as shown in Figure 11, an embodiment of the present invention further provides another method for preparing a cable assembly, wherein step S30 and step S31 are added to the method.

[0207] Please refer to FIG4, FIG5 and FIG11 in combination. Specifically, the method further includes:

[0208] S30 , providing a conductive device 31 and disposing it on a portion of the periphery of the first cable core 11 and the second cable core 21 .

[0209] S31. Connect one end of the conductive device 31 (the left end in FIG5 ) and the free end of the first shielding layer 13 (the right end in the figure), and connect the other end of the conductive device 31 (the right end in FIG5 ) and the free end of the second shielding layer 23 (the left end in the figure).

[0210] The conductive device 31 and the first shielding layer 13 can be welded together using laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing to enhance the connection strength between the conductive device 31 and the first shielding layer 13. Correspondingly, the conductive device 31 and the second shielding layer 23 can also be welded together using laser welding, ultrasonic welding, resistance welding, pressure diffusion welding, or brazing to enhance the connection strength between the conductive device 31 and the second shielding layer 23.

[0211] It is understandable that, in specific implementations, other methods may also be used to connect the conductive device 31 and the first shielding layer 13 , and to connect the conductive device 31 and the second shielding layer 23 .

[0212] In addition, before step S31 , the method may further include: providing an isolation sleeve 30 around the connection between the first cable core 11 and the second cable core 21 to prevent conductive contact between the connection and the conductive device 31 .

[0213] The isolation sleeve 30 may be a heat shrink tube or other insulating layer directly injection-molded on the outside of the connection.

[0214] In addition, in some embodiments, when the outer side of the first cable 10 has a third protective layer 14, when performing step S11, the step also includes peeling off the third protective layer 14 of the first cable 10. Correspondingly, when the outer side of the second cable 20 has a fourth protective layer 24, when performing step S21, the step also includes peeling off the fourth protective layer 24 of the second cable 20.

[0215] 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.

[0216] 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 cable assembly, characterized in that, include: The first cable includes a first cable core and a first shielding layer. The first cable core is surrounded by a first protective layer, and the first shielding layer is disposed outside the first protective layer. The second cable includes a second cable core and a second shielding layer. The second cable core is surrounded by a second protective layer, and the second shielding layer is disposed outside the second protective layer. The free end of the first cable core is connected to the free end of the second cable core, and the free end of the first shielding layer is connected to the free end of the second shielding layer.

2. The cable assembly according to claim 1, characterized in that, The first shielding layer and the second shielding layer are connected symmetrically.

3. The cable assembly according to claim 1, characterized in that, The first shielding layer and the second shielding layer are connected at a 360° angle.

4. The cable assembly according to claim 1, characterized in that, The free end of the first shielding layer overlaps or connects with the free end of the second shielding layer.

5. The cable assembly according to claim 1, characterized in that, The cable assembly further includes a conductive device disposed on a portion of the periphery of the first cable core and the second cable core, wherein a first end of the conductive device is connected to the free end of the first shielding layer, and a second end of the conductive device is connected to the free end of the second shielding layer.

6. The cable assembly according to claim 5, characterized in that, The connection between one end of the conductive device and the free end of the first shielding layer is symmetrically arranged, and the connection between the second end of the conductive device and the free end of the second shielding layer is also symmetrically arranged.

7. The cable assembly according to claim 5, characterized in that, The connection between one end of the conductive device and the free end of the first shielding layer is configured to be 360°, and the connection between the second end of the conductive device and the free end of the second shielding layer is configured to be 360°.

8. The cable assembly according to claim 5, characterized in that, The conductive device overlaps or connects with the first shielding layer.

9. The cable assembly according to claim 5, characterized in that, The conductive device overlaps or connects with the second shielding layer.

10. The cable assembly according to claim 5, characterized in that, An insulating protective layer is provided around the first shielding layer, the second shielding layer, and the conductive device.

11. The cable assembly according to claim 1, characterized in that, The first cable core has a protruding section extending out of the first protective layer, and the second cable core has a protruding section extending out of the second protective layer.

12. The cable assembly according to claim 11, characterized in that, The cable assembly also includes an isolation sleeve disposed around the extended sections of the first cable core and the second cable core.

13. The cable assembly according to claim 12, characterized in that, The thickness of the isolation sleeve is at least greater than either the thickness of the first protective layer or the thickness of the second protective layer.

14. The cable assembly according to claim 12, characterized in that, One end of the isolation sleeve is connected to the first protective layer, and the other end of the isolation sleeve is connected to the second protective layer.

15. The cable assembly according to claim 1, characterized in that, The free end of the first cable core is overlapped or connected to the free end of the second cable core.

16. The cable assembly according to claim 15, characterized in that, The minimum cross-sectional area of ​​the lap or docking position is greater than or equal to the minimum cross-sectional area of ​​the first cable core and the second cable core.

17. The cable assembly according to claim 5, 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.

18. The cable assembly according to any one of claims 1-17, characterized in that, The minimum cross-sectional area at the point where the free end of the first shielding layer overlaps or connects with the free end of the second shielding layer is 60%-260% of the minimum cross-sectional area of ​​the first shielding layer and the second shielding layer.

19. The cable assembly according to any one of claims 5-10 or 17, characterized in that, The minimum cross-sectional area at the point where the conductive device overlaps or connects with the first or second shielding layer is 60%-260% of the minimum cross-sectional area of ​​the first or second shielding layer.

20. The cable assembly according to claim 1, characterized in that, The impedance at the connection point between the first shielding layer and the second shielding layer is less than 13.7mΩ.

21. The cable assembly according to claim 1, characterized in that, The impedance at the connection point between the first shielding layer and the second shielding layer is less than 12.5mΩ.

22. The cable assembly according to claim 5, characterized in that, The impedance at the connection point between the first end of the conductive device and the free end of the first shielding layer is less than 13.7 mΩ, and the impedance at the connection point between the second end of the conductive device and the free end of the second shielding layer is less than 13.7 mΩ.

23. The cable assembly according to claim 5, characterized in that, The impedance at the connection point between the first end of the conductive device and the free end of the first shielding layer is less than 12.5mΩ, and the impedance at the connection point between the second end of the conductive device and the free end of the second shielding layer is less than 12.5mΩ.

24. The cable assembly according to claim 1, characterized in that, The first cable further includes a third protective layer, and the second cable further includes a fourth protective layer; The third protective layer is disposed outside the first shielding layer, and the fourth protective layer is disposed outside the second shielding layer.

25. A method for manufacturing a cable assembly, characterized in that, include: A first cable is provided, the first cable including a first cable core, a first protective layer and a first shielding layer, the first protective layer being disposed outside the first cable core and the first shielding layer being disposed outside the first protective layer; The first shielding layer and the first protective layer at the first end of the first cable are stripped to expose the first cable core. A second cable is provided, the second cable including a second cable core, a second protective layer and a second shielding layer, the second protective layer being disposed on the outside of the second cable core and the second shielding layer being disposed on the outside of the second protective layer; The second shielding layer and the second protective layer at the first end of the second cable are stripped to expose the second cable core. Connect the free end of the first cable core to the free end of the second cable core; Connect the free end of the first shielding layer to the free end of the second shielding layer.

26. The preparation method according to claim 25, characterized in that, Connecting the free end of the first cable core to the free end of the second cable core specifically includes: The free end of the first cable core is connected to the free end of the second cable core using welding or crimping processes.

27. The preparation method according to claim 25, characterized in that, Connecting the free end of the first shielding layer to the free end of the second shielding layer specifically includes: The free ends of the first shielding layer and the second shielding layer are connected by welding.

28. The preparation method according to claim 25, characterized in that, Connecting the free end of the first shielding layer to the free end of the second shielding layer specifically includes: A conductive device is provided and disposed on a portion of the periphery of the first cable core and the second cable core. A welding process is used to connect the first end of the conductive device to the free end of the first shielding layer and the second end of the conductive device to the free end of the second shielding layer.

29. The preparation method according to claim 28, characterized in that, Before connecting the first end of the conductive device to the free end of the first shielding layer and the second end of the conductive device to the free end of the second shielding layer, the method further includes: An isolation sleeve is provided around the connection between the first cable core and the second cable core.

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