Compatible vehicle-mounted Ethernet cable

Abstract

The utility model relates to the technical field of network cables, in particular to a compatible vehicle-mounted Ethernet cable. A wrapping layer, a shielding layer and a sheath layer wrap the periphery of a core wire, the wrapping layer is formed by wrapping a composite belt, the composite belt is formed by sequentially stacking an aluminum foil layer, a plastic layer and an aluminum foil layer, the core wire comprises a conductor and an insulating layer, the insulating layer is of a three-layer co-extrusion structure, and the insulating layer comprises an inner layer, a center layer and an outer layer which sequentially wrap the conductor from inside to outside. Through the composite belt composed of the aluminum foil layer, the plastic layer and the aluminum foil layer, the structure of the twisted core wire is more stable, a better forming effect and a better shielding effect are achieved, meanwhile, the consistency of the distance between the conductor and the aluminum foil layer is guaranteed, and therefore the stability of wire return loss and mode conversion performance is guaranteed; the insulating layer of the core wire adopts a three-layer co-extrusion structure, so that stable adhesive force between the insulating layer and the conductor can be ensured, the wire has a lower relative dielectric constant, and the wire is ensured to meet basic conditions of 1G and 10G performance requirements.

Description

Technical Field

[0001] The present application relates to the technical field of network cables, and in particular to a compatible vehicle-mounted Ethernet cable. Background Art

[0002] With the rapid development of the automotive industry, especially the rise of smart cars and autonomous driving technology, higher requirements are placed on in-vehicle communication networks. At present, 1G and 10G in-vehicle Ethernet cables in the industry use completely different structures, resulting in a large number of Ethernet products in the industry, whether cables or connectors, and no standardization. Therefore, in response to the high performance requirements of TC9 for 1G in-vehicle Ethernet mode conversion (LCL and LCTL) and the requirements for 10G in-vehicle Ethernet attenuation bandwidth, it is necessary to propose the design of 1Gbps and 10Gbps compatible in-vehicle Ethernet cables. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a compatible in-vehicle Ethernet cable, comprising two twisted core wires, a wrapping layer, a shielding layer and a sheath layer sequentially wrapped around the core wires, the wrapping layer is formed by wrapping a composite tape, the composite tape is composed of an aluminum foil layer, a plastic layer and an aluminum foil layer stacked in sequence, the core wire comprises a plurality of conductors and an insulating layer, the insulating layer is a three-layer co-extrusion structure, and the insulating layer comprises an inner layer, a center layer and an outer layer sequentially wrapping a plurality of the conductors from the inside to the outside.

[0004] Preferably, the wrapping pitch of the wrapping layer is 12-13 mm.

[0005] Preferably, the thickness of the aluminum foil layer is 9 μm; the thickness of the plastic layer is 30 μm.

[0006] Preferably, the inner layer and the outer layer are modified polypropylene, the central layer is modified foamed polypropylene, the central layer is physically foamed, the foaming degree is 30%, and the capacitance in water is 105 pF / m.

[0007] Preferably, the conductor is composed of two layers of tinned annealed soft copper wires twisted together, the central layer is one tinned annealed soft copper wire, and the outer layer is six tinned annealed soft copper wires.

[0008] Preferably, the twist pitch of the two core wires is 19-20 mm.

[0009] Preferably, the shielding layer is woven from 96 copper wires with a diameter of 0.10-0.12 mm.

[0010] Preferably, the shielding layer has a braiding pitch of 21.4-22 mm, a braiding angle of 68°-70°, and a braiding density of 84%-86%.

[0011] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: by coating the wrapping layer, the shielding layer and the sheath layer on the outer periphery of the core wire, the wrapping layer is formed by wrapping the composite tape, the composite tape is composed of an aluminum foil layer, a plastic layer and an aluminum foil layer stacked in sequence, the core wire includes a conductor and an insulating layer, the insulating layer is a three-layer co-extruded structure, and the insulating layer includes an inner layer, a center layer and an outer layer that sequentially wrap the conductor from the inside to the outside. The composite tape composed of the aluminum foil layer-plastic layer-aluminum foil layer makes the twisted core wire structure more stable, and has a better molding effect and shielding effect, while ensuring the consistency of the distance between the conductor and the aluminum foil layer, thereby ensuring the stability of the wire return loss and mode conversion performance, the insulation layer of the core wire adopts a three-layer co-extruded structure to ensure that there is a stable adhesion between the insulation layer and the conductor, thereby ensuring that the wire will not have poor mode conversion and attenuation caused by the relative sliding of the conductor and the insulation layer when the wire is twisted, wrapped and other processes, so that the wire has a lower relative dielectric constant, and ensures that the wire has the basic conditions to meet the 1G and 10G performance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the description of the embodiments of the present application or the prior art are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0013] Figure 1 This is a schematic diagram of the structure of a compatible vehicle-mounted Ethernet cable according to an embodiment of the present application;

[0014] Figure 2 This is a schematic diagram of the core wire structure of an embodiment of the present application. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] Example

[0017] In order to solve the above technical problems, this embodiment provides a compatible vehicle Ethernet cable, such as Figure 1-2As shown, it includes two twisted core wires 10, a wrapping layer 20, a shielding layer 30 and a sheath layer 40 sequentially wrapped around the core wire 10, the wrapping layer 20 is formed by wrapping a composite tape, and the composite tape is composed of an aluminum foil layer, a plastic layer and an aluminum foil layer stacked in sequence, the core wire 10 includes a conductor 11 and an insulating layer 12, the insulating layer 12 is a three-layer co-extruded structure, and the insulating layer 12 includes an inner layer 121, a center layer 122 and an outer layer 123 sequentially wrapping the conductor 11 from the inside to the outside. The composite tape composed of aluminum foil layer, plastic layer and aluminum foil layer is wrapped around the outer periphery of the twisted core wire 10, so that the structure of the twisted core wire 10 is more stable, and a better molding effect and shielding effect are achieved. At the same time, the consistency of the distance between the conductor 11 and the aluminum foil layer is ensured, thereby ensuring the stability of the wire return loss and mode conversion performance, and achieving compatibility with 1G and 10G performance. The insulation layer 12 of the core wire 10 adopts a three-layer co-extrusion structure to ensure stable adhesion between the insulation layer 12 and the conductor 11, thereby ensuring that the wire will not have poor mode conversion and attenuation caused by relative sliding between the conductor 11 and the insulation layer 12 when undergoing processes such as twisting and wrapping, so that the wire has a lower relative dielectric constant, ensuring that the wire has the basic conditions to meet the performance requirements of 1G and 10G.

[0018] Specifically, the wrapping pitch of the wrapping layer 20 is 12-13mm, and preferably, the designed wrapping pitch is 13mm, so that the aluminum foil layer and the twisted core wire 10 can fit tightly without wrinkles, ensuring the consistency of the distance between the conductor center and the aluminum foil shielding. Among them, the wrapping layer 20 is formed by wrapping with a composite tape, and the composite tape is composed of an aluminum foil layer, a plastic layer and an aluminum foil layer stacked in sequence. The width of the composite tape is 10mm, wherein the thickness of the aluminum foil layer is 9μm, the thickness of the plastic layer is 30μm, and the plastic layer is made of polypropylene material with a dielectric constant of 2.2. By wrapping the composite tape of the above structure on the twisted core wire 10, the attenuated resonance point can be moved back to after 7GHz, thereby achieving the compatibility of the 1G and 10G performance of the wire.

[0019] Furthermore, the insulating layer 12 is a three-layer co-extruded one, the inner layer 121 and the outer layer 123 are modified polypropylene, the central layer 122 is a modified foamed polypropylene, the central layer 122 is physically foamed, the foaming degree is 30%, the capacitance in water is 105pF / m, and the relative dielectric constant of the three-layer insulation is ensured to be 1.9. The foaming design using three-layer co-extrusion can obtain a lower relative dielectric constant, achieving lightweight while making the wire have lower attenuation. The application of the outer layer 123 not only provides a lower relative dielectric constant, but also because it has excellent physical and mechanical properties such as high temperature resistance, low temperature resistance, and oil resistance after modification, it can better protect the foaming layer of the central layer 122.

[0020] In the above scheme, the conductor 11 of the core wire 10 is composed of two layers of tinned annealed soft copper wires twisted together, the central layer is 1 tinned annealed soft copper wire, and the outer layer is 6 tinned annealed soft copper wires. Among them, the diameter of the tinned annealed soft copper wire is 0.165mm, and the tinned annealed soft copper wire adopts the hot-dip tinning process, and the thickness of the tin layer is 0.3μm. When multiple strands of tinned annealed soft copper wires are twisted into conductor 11, a specific pressing mold is used to press and shape the conductor 11. The designed pressing coefficient is 96%. The diameter of the conductor 11 after twisting is 0.48mm, which can ensure that there is no gap between each conductor 11. The surface is smooth and the size is stable after twisting. It has better consistency and symmetry when used in differential signal line pairs, thereby ensuring that the wire can easily meet the requirements of 1G and 10G mode conversion.

[0021] Furthermore, the twisting pitch of the two core wires 10 is 19-20mm. Preferably, the 19mm twisting pitch can ensure that the wires fit perfectly after being twisted, and will not be loose. At the same time, the core wire 10 will not be squeezed and deformed due to too tight twisting, thereby ensuring that the mode conversion requirements can be met while also ensuring the attenuation bandwidth requirements. In addition, the use of a twisting bow back-twisting method with a back-twisting rate of 100% is not only highly efficient, but also can completely eliminate the internal stress generated by the twisting, avoiding the tendency of the twisted wire to move in the opposite direction of the twisting due to internal stress, thereby making the structure of the twisted pair group more stable, ensuring that it has the basic conditions to meet the 1G and 10G performance requirements.

[0022] Furthermore, the shielding layer 30 is woven with 96 copper wires with a diameter of 0.10-0.12 mm, and the shielding layer 30 has a weaving pitch of 21.4-22 mm, a weaving angle of 68°-70°, and a weaving density of 84%-86%. The 0.1 mm tinned annealed soft copper wire designed for weaving has excellent conductivity and softness, so that it has lower shielding attenuation; the 21.4 mm weaving pitch design enables the weaving to fit more closely with the aluminum foil, thereby improving the overall shielding effect of the wire.

[0023] Furthermore, the sheath layer 40 adopts a modified thermoplastic elastomer outer sheath with a hardness of about 92A. It not only retains the high elastic properties of the elastomer, but also has high temperature resistance, oil resistance, flame retardancy, low temperature resistance and other properties by adding modifiers. While ensuring the high flexibility of the wire, it also ensures the reliability of the cable to work stably in the complex environment inside the vehicle.

[0024] In summary, the present application scheme is to wrap the wrapping layer, shielding layer and sheath layer around the core wire, the wrapping layer is formed by wrapping with a composite tape, the composite tape is composed of an aluminum foil layer, a plastic layer and an aluminum foil layer stacked in sequence, the core wire includes a conductor and an insulating layer, the insulating layer is a three-layer co-extruded structure, and the insulating layer includes an inner layer, a center layer and an outer layer that wrap the conductor in sequence from the inside to the outside. The composite tape composed of the aluminum foil layer-plastic layer-aluminum foil layer makes the twisted core wire structure more stable, and has a better molding effect and shielding effect, while ensuring the consistency of the distance between the conductor and the aluminum foil layer, thereby ensuring the stability of the wire return loss and mode conversion performance. The insulation layer of the core wire adopts a three-layer co-extruded structure to ensure that there is a stable adhesion between the insulation layer and the conductor, thereby ensuring that the wire will not have poor mode conversion and attenuation caused by the relative sliding between the conductor and the insulation layer when undergoing twisting, wrapping and other processes, so that the wire has a lower relative dielectric constant, and ensures that the wire has the basic conditions to meet the 1G and 10G performance requirements.

[0025] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A compatible vehicle Ethernet cable, characterized in that: The invention comprises two twisted core wires (10), a wrapping layer (20) sequentially wrapped around the core wires (10), a shielding layer (30) and a sheath layer (40), wherein the wrapping layer (20) is formed by wrapping a composite tape, wherein the composite tape is composed of an aluminum foil layer, a plastic layer and an aluminum foil layer stacked in sequence, wherein the core wire (10) comprises a conductor (11) and an insulating layer (12), wherein the insulating layer (12) is a three-layer co-extruded structure, and wherein the insulating layer (12) comprises an inner layer (121), a center layer (122) and an outer layer (123) sequentially wrapped around the conductor (11) from the inside out.

2. The compatible vehicle-mounted Ethernet cable according to claim 1, characterized in that: The wrapping pitch of the wrapping layer (20) is 12-13 mm.

3. The compatible vehicle-mounted Ethernet cable according to claim 2, characterized in that: The thickness of the aluminum foil layer is 9 μm, and the thickness of the plastic layer is 30 μm.

4. The compatible vehicle-mounted Ethernet cable according to claim 1, characterized in that: The inner layer (121) and the outer layer (123) are modified polypropylene, the central layer (122) is modified foamed polypropylene, the central layer (122) is physically foamed, the foaming degree is 30%, and the capacitance in water is 105 pF / m.

5. The compatible vehicle-mounted Ethernet cable according to claim 1, characterized in that: The conductor (11) is composed of two layers of tinned annealed soft copper wires twisted together, the central layer is one tinned annealed soft copper wire, and the outer layer is six tinned annealed soft copper wires.

6. The compatible vehicle-mounted Ethernet cable according to claim 5, characterized in that: The twist pitch of the two core wires (10) is 19-20 mm.

7. The compatible vehicle-mounted Ethernet cable according to claim 1, characterized in that: The shielding layer (30) is woven from 96 copper wires with a diameter of 0.10-0.12 mm.

8. The compatible vehicle-mounted Ethernet cable according to claim 7, characterized in that: The shielding layer (30) has a braiding pitch of 21.4-22 mm, a braiding angle of 68°-70°, and a braiding density of 84%-86%.

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