Multi-layer shielding automobile high-speed transmission Ethernet cable

Abstract

The utility model discloses a multi-layer shielding automobile high-speed transmission Ethernet cable comprising two core wires and a metal drainage wire, and the core wires and the metal drainage wire are sequentially coated with a tinned copper wire braid layer, a double-layer nanometer composite shielding layer and an irradiation crosslinking polyolefin sheath. And the double-layer nano composite shielding layer comprises a high-conductivity nano material inner layer and a high-permeability nano material outer layer. The multi-layer shielding automobile high-speed transmission Ethernet cable provided by the utility model has the advantages of high transmission efficiency, high reliability, strong durability and the like.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a multi-layer shielded high-speed automotive Ethernet cable. Background Technology

[0002] Automotive Ethernet is a local area network (LAN) technology specifically designed for the automotive environment. It's based on the traditional Ethernet protocol but optimized and tailored to the specific needs of in-vehicle networks. Automotive Ethernet cables are used to transmit vehicle network data, connecting various in-vehicle electronic devices (such as dashboards, dashcams, navigation systems, audio systems, cameras, etc.) and enabling data communication and transmission via the Ethernet protocol. With the development of automotive electronic systems, the demand for automotive Ethernet cables continues to increase, especially in terms of transmission reliability and durability, where continuous innovation and optimization are still needed. Utility Model Content

[0003] The purpose of this invention is to provide a multi-layer shielded high-speed automotive Ethernet cable to solve the problems existing in the prior art.

[0004] The purpose of this utility model is achieved as follows: a multi-layer shielded automotive high-speed transmission Ethernet cable includes two core wires and one metal lead wire. The core wires and the metal lead wire are successively covered with a tinned copper wire braided layer, a double-layer nanocomposite shielding layer and an irradiated cross-linked polyolefin sheath. The double-layer nanocomposite shielding layer includes a highly conductive nanomaterial inner layer and a highly magnetic nanomaterial outer layer.

[0005] This invention relates to a multi-layer shielded high-speed automotive Ethernet cable. Through multi-level synergistic shielding using a tinned copper wire braided layer and a double-layer nanocomposite shielding layer, combined with the electromagnetic energy conduction function of the metal guide wires, the cable's shielding effectiveness is significantly improved. Simultaneously, the irradiated cross-linked polyolefin sheath ensures the cable's flexibility and resistance to deformation within extreme temperature ranges. In summary, this multi-layer shielded high-speed automotive Ethernet cable offers advantages such as high transmission efficiency and reliability, and strong durability.

[0006] As a further improvement of this invention, the inner layer of the highly conductive nanomaterial adopts a grid structure, while the outer layer of the highly magnetically permeable nanomaterial adopts a dense, highly magnetically permeable nano-coating. The double-layer nanocomposite shielding layer, based on an advanced nanocomposite structure design, is composed of layers of highly magnetically permeable and highly conductive nanomaterials, exhibiting strong electromagnetic shielding effectiveness and anti-interference capabilities. Its outer layer, a dense, highly magnetically permeable nano-coating, can rapidly absorb and convert high-frequency electromagnetic wave energy; the inner layer is a conductive nanogrid structure, which further reflects residual interference signals through the principle of impedance gradient, forming a wide-band (covering the MHz to GHz range) synergistic absorption barrier, effectively suppressing electromagnetic leakage and external radiation interference. The ultra-fine structure of the nanomaterials endows the shielding layer with excellent high-temperature resistance (-50℃ to 150℃), resistance to damp heat, and resistance to chemical corrosion, maintaining stable shielding performance.

[0007] As a further improvement of this utility model, the metal lead wire adopts a copper-silver composite lead wire, which combines the high conductivity of copper with the excellent anti-oxidation properties of silver, achieving a dual breakthrough in efficiency and stability in power transmission and signal transmission.

[0008] As a further improvement of this utility model, the copper-silver composite lead wire comprises a high-purity copper core and a silver-plated surface layer. The copper-silver composite lead wire is composed of a high-purity copper core and a precision silver-plated surface layer. The copper-silver metallurgical interface is densely bonded through molecular diffusion technology, ensuring conductivity is increased to more than 1.2 times that of pure copper, while significantly reducing contact resistance and energy loss. This makes it suitable for high-efficiency energy transmission in high-frequency, high-current scenarios. The silver plating on the surface layer gives the lead wire extremely strong corrosion resistance, maintaining a low-oxidation surface state even in high-temperature (-50℃ to 200℃), high-humidity, or polluted environments, preventing performance degradation due to contact deterioration. The inner copper core has its crystal structure optimized through an annealing process, combining high current carrying capacity with flexibility, supporting mechanical reliability under repeated bending and complex wiring paths, and reducing the risk of installation fatigue fracture.

[0009] As a further improvement of this utility model, the core wire includes a bare copper conductor and an elastomeric insulation layer covering the bare copper conductor. The heart of the Ethernet data cable—the high-purity bare copper conductor—ensures high efficiency and stability of signal transmission due to its excellent conductivity and extremely low resistivity. A fine wire drawing process ensures a smooth conductor surface, reducing signal attenuation during transmission and guaranteeing high-speed, lossless data transmission. Furthermore, the bare copper conductor has good thermal conductivity, effectively dissipating heat even under prolonged high-load operation, ensuring stable cable operation in environments with a temperature resistance of 125℃, providing a solid physical foundation for data transmission. The elastomeric insulation layer is made of a polymer-modified elastomer material, possessing excellent electrical insulation properties, mechanical flexibility, and environmental adaptability. It features high dielectric strength and low dielectric loss, effectively suppressing current leakage and electromagnetic interference in high-frequency signal transmission, ensuring signal integrity. Its wide temperature range tolerance (-50℃ to 150℃) allows it to maintain stable insulation resistance even under extreme conditions. In addition, it has excellent resistance to deformation and resilience, which enables the cable to maintain its structural integrity in frequent bending, torsion or vibration scenarios, prevents displacement or micro-gap discharge between the insulation layer and the conductor, and provides reliable electrical isolation protection for power and signal transmission under complex working conditions.

[0010] As a further improvement of this utility model, the metal lead wire is closely attached to the two core wires. The close attachment of the metal lead wire and the two core wires forms a triangular symmetrical structure, which reduces the unevenness of distributed capacitance during high-frequency signal transmission through physical coupling, suppresses crosstalk between lines, optimizes the electromagnetic field distribution to maintain the stability of characteristic impedance, and improves bending resistance by utilizing the uniform distribution effect of mechanical stress, thus meeting the dynamic reliability requirements of wiring in the confined space of automotive wiring harnesses. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the multi-layer shielded high-speed automotive Ethernet cable of this utility model.

[0012] The structure consists of: 1. bare copper conductor; 2. elastomeric insulation layer; 3. metal lead wire; 4. tinned copper wire braided layer; 5. double-layer nanocomposite shielding layer; and 6. irradiated cross-linked polyolefin sheath. Detailed Implementation

[0013] like Figure 1 The multi-layer shielded automotive high-speed Ethernet cable shown includes two core wires and one metal lead wire 3.

[0014] The core wire includes a bare copper conductor 1 and an elastic insulating layer 2 covering the bare copper conductor 1.

[0015] The heart of the Ethernet data cable—the high-purity bare copper conductor 1—ensures high efficiency and stability in signal transmission due to its superior conductivity and extremely low resistivity. A fine wire-drawing process results in a smooth conductor surface, reducing signal attenuation during transmission and guaranteeing high-speed, lossless data transmission. Furthermore, the bare copper conductor 1 possesses excellent thermal conductivity, effectively dissipating heat even under prolonged high-load operation, ensuring stable cable operation in environments with a temperature resistance of 125℃, providing a solid physical foundation for data transmission.

[0016] The elastomeric insulation layer 2 is made of a polymer-modified elastomer material, possessing excellent electrical insulation properties, mechanical flexibility, and environmental adaptability. It features high dielectric strength and low dielectric loss, effectively suppressing current leakage and electromagnetic interference in high-frequency signal transmission, ensuring signal integrity. Its wide temperature range tolerance (-50℃ to 150℃) allows it to maintain stable insulation resistance even under extreme conditions. Furthermore, it possesses superior deformation resistance and resilience, supporting the cable in maintaining structural integrity under frequent bending, torsion, or vibration scenarios, preventing displacement or micro-gap discharge between the insulation layer and the conductor, and providing reliable electrical isolation protection for power and signal transmission under complex operating conditions.

[0017] The metal lead wire 3 is a copper-silver composite lead wire, which is composed of a high-purity copper core and a precision silver plating process. Combining the high conductivity of copper with the excellent oxidation resistance of silver, it achieves a dual breakthrough in efficiency and stability in power transmission and signal conduction. Its copper-silver metallurgical interface forms a dense bond through molecular diffusion technology, ensuring conductivity is more than 1.2 times that of pure copper, while significantly reducing contact resistance and energy loss, making it suitable for high-efficiency energy transmission in high-frequency, high-current scenarios. The surface silver plating gives the lead wire extremely strong corrosion resistance, maintaining a low-oxidation surface state even in high-temperature (-50℃ to 200℃), high-humidity, or polluted environments, avoiding performance degradation due to contact deterioration. The inner copper core has its crystal structure optimized through an annealing process, possessing both high current carrying capacity and flexibility, supporting mechanical reliability under repeated bending and complex wiring paths, and reducing the risk of installation fatigue fracture.

[0018] The metal lead wire 3 is installed in close contact with the two core wires. The close contact between the metal lead wire 3 and the two core wires forms a triangular symmetrical structure. Through physical coupling, the unevenness of distributed capacitance during high-frequency signal transmission is reduced, and crosstalk between lines is suppressed. At the same time, the electromagnetic field distribution is optimized to maintain the stability of characteristic impedance, and the bending resistance is improved by the uniform distribution effect of mechanical stress, thus meeting the dynamic reliability requirements of wiring in the narrow space of automotive wiring harnesses.

[0019] The core wire and metal lead wire 3 are successively covered with a tinned copper wire braided layer 4, a double-layer nanocomposite shielding layer 5, and an irradiated cross-linked polyolefin sheath 6.

[0020] The tin-plated copper wire braided layer 4, with its tight braided structure and excellent conductivity, further enhances the cable's shielding effectiveness and mechanical strength. The tin plating treatment not only improves the copper wire's corrosion resistance and oxidation resistance but also ensures the braided layer maintains stable shielding performance even in harsh environments such as humidity and high temperatures. Furthermore, the tin-plated copper wire braided layer possesses a degree of flexibility, facilitating cable bending and installation, and providing reliable physical protection for data transmission.

[0021] The dual-layer nanocomposite shielding layer 5 is based on an advanced nanocomposite structure design, composed of layered composites of highly magnetically and electrically conductive nanomaterials, exhibiting strong electromagnetic shielding effectiveness and anti-interference capabilities. Its outer layer employs a dense, highly magnetically permeable nanocoating that can rapidly absorb and convert high-frequency electromagnetic wave energy; the inner layer is a conductive nanogrid structure that further reflects residual interference signals through the principle of impedance gradient, forming a wide-band (covering the MHz to GHz range) synergistic absorption barrier, effectively suppressing electromagnetic leakage and external radiation interference. The ultra-fine structure of the nanomaterials endows the shielding layer with excellent high-temperature resistance (-50℃ to 150℃), resistance to damp heat, and resistance to chemical corrosion, maintaining stable shielding performance.

[0022] Irradiated cross-linked polyolefin sheath 6 serves as the high-performance outer protective structure of the cable. It utilizes irradiation cross-linking technology to modify the molecular chains of the polyolefin substrate, forming a three-dimensional network cross-linked structure, endowing it with excellent high-temperature resistance, mechanical strength, and long-term stability. This sheath maintains excellent flexibility and deformation resistance within an extreme temperature range (-60℃ to 150℃), exhibiting strong resistance to oil, solvents, and acidic / alkaline media. In the event of fire, it effectively inhibits flame spread and reduces the release of toxic fumes. Its surface is precision-machined for smoothness and wear resistance. Combined with a uniform wall thickness design and moderate peel strength, it simplifies cable installation and wiring processes while ensuring a tight fit between the sheath and the core under frequent bending or high vibration conditions, preventing delamination or wear. Furthermore, the irradiated cross-linked polyolefin sheath exhibits outstanding anti-aging properties, and its lightweight characteristics further optimize the cable's portability and spatial adaptability.

[0023] In summary, the multi-layer shielded automotive high-speed Ethernet cable of this embodiment has advantages such as high transmission efficiency and reliability, and strong durability.

[0024] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A multi-layer shielded automotive high-speed transmission Ethernet cable, characterized in that: It includes two core wires and one metal lead wire. The core wires and the metal lead wire are sequentially covered with a tinned copper wire braided layer, a double-layer nanocomposite shielding layer and an irradiated cross-linked polyolefin sheath. The double-layer nanocomposite shielding layer includes an inner layer of highly conductive nanomaterials and an outer layer of highly magnetic nanomaterials.

2. The multi-layer shielded automotive high-speed transmission Ethernet cable according to claim 1, characterized in that: The inner layer of the highly conductive nanomaterial adopts a grid structure, and the outer layer of the highly magnetic nanomaterial adopts a dense highly magnetic nanocoating.

3. The multi-layer shielded automotive high-speed transmission Ethernet cable according to claim 1, characterized in that: The metal drain wire is a copper-silver composite drain wire.

4. The multi-layer shielded automotive high-speed transmission Ethernet cable according to claim 3, characterized in that: The copper-silver composite drain wire consists of a high-purity copper core and a silver-plated surface layer.

5. The multi-layer shielded automotive high-speed transmission Ethernet cable according to any one of claims 1-4, characterized in that: The core wire includes a bare copper conductor and an elastomeric insulation layer covering the bare copper conductor.

6. The multi-layer shielded automotive high-speed Ethernet cable according to any one of claims 1-4, characterized in that: The metal lead wire is installed in close contact with the two core wires.

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