Vehicle-mounted 10-gigabit Ethernet cable

Abstract

The vehicle-mounted 10-gigabit Ethernet cable comprises an insulated wire pair, a filling layer, a shielding layer, a braid layer and a sheath layer which are sequentially sleeved from inside to outside, each insulated wire pair is formed by twisting two wire cores in a full back-twist mode; a conductor of the wire core is formed by twisting seven copper-tin alloy stranded wires, each copper-tin alloy stranded wire is a silver-plated copper-tin alloy stranded wire, a copper-clad copper-tin alloy stranded wire or a copper-plated copper-tin alloy stranded wire with the single wire diameter of 0.16 mm, and an insulating layer is made of fluorinated ethylene propylene or soluble polytetrafluoroethylene solid insulation; the filling layer is filled with a TPE-S material with the hardness of 50-60 D, and the outer contour of the filling layer is cylindrical; the shielding layer is a double-sided aluminum-plastic composite foil or a copper-plastic composite foil; the braided layer is braided by tinned copper-tin alloy wires; the sheath layer is made of TPE-S or polyvinylidene fluoride. According to the utility model, the problems that the original network cable is easy to deform in the use process, the return loss index and the unbalanced attenuation index are reduced, and the tensile resistance of the cable is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of the road vehicle with the gigabit Ethernet cable, especially a vehicle-mounted gigabit Ethernet cable. BACKGROUND

[0002] With the development of automobile electrification, intelligence, networking and sharing, the explosive growth of vehicle communication data has obviously exceeded the communication rate limit of traditional buses such as CAN and Flexray. In the automatic driving system, a large amount of sensor data needs to be processed, including laser radar, camera and radar, etc. The data transmission of these sensors requires high bandwidth and low delay to ensure real-time and safety. Secondly, in the transmission of high-definition video playback, multi-screen interaction and other applications, gigabit or even higher bandwidth Ethernet is needed to meet these requirements and provide stable and reliable data transmission.

[0003] The current road vehicle with gigabit Ethernet cable is usually a single pair of shielded twisted pair, which has a structure of a single pair of tin-plated copper or bare copper conductor, a modified polypropylene insulated twisted pair, a metal foil wrapped outside, and then a tin-plated copper wire woven, and finally a sheath extruded.

[0004] In the prior art, the conductor is a 7-strand tin-plated copper wire with a single wire diameter of 0.16mm, which has good electrical performance, but its tensile strength is small. During laying and use, the cable is deformed under external force, resulting in a decrease in transmission performance or even failure. Since the wire pair has a spiral structure, the existing technology cannot form a cylindrical shielding cavity when directly wrapping the aluminum-plastic composite foil outside the wire pair, resulting in irregular changes in the distance between the wire pair center and the shield, ultimately leading to difficulty in further improving the return loss of the cable, and the unbalanced attenuation index (LCL, LCTL) of the wire pair is not ideal, sometimes even unable to meet the use requirements. Furthermore, the wire pair in the prior art is directly wrapped with double-sided aluminum-plastic composite foil and tin-plated copper wire weaving structure, which is prone to local bending and wrinkle of the aluminum foil during cable assembly and laying, resulting in a decrease in the return loss of the cable. The low tensile strength of the woven wire also leads to low tensile strength of the cable. SUMMARY

[0005] The utility model solves the technical problems that the original gigabit Ethernet cable is prone to deformation during use, the return loss index and unbalanced attenuation index decrease, and the tensile strength of the cable is low.

[0006] The utility model is implemented as follows:

[0007] A vehicle-mounted gigabit Ethernet cable comprises:

[0008] The insulating wire pair, the filling layer, the shielding layer, the braiding layer and the sheath layer are sequentially sleeved from inside to outside;

[0009] The insulating wire pair is twisted by two wire cores in a full untwist manner;

[0010] The wire core sequentially comprises a conductor and an insulating layer from inside to outside;

[0011] The conductor is twisted by seven copper-tin alloy strands, each of which is selected from a silver-plated copper-tin alloy strand, a copper-clad copper-tin alloy strand or a copper-plated copper-tin alloy strand with a single wire diameter of 0.16 mm;

[0012] The insulating layer is selected from polyperfluoroethylene propylene or soluble polytetrafluoroethylene solid insulation;

[0013] The filling layer is filled with TPE-S material with a hardness of 50-60D, and the outer contour is cylindrical;

[0014] The shielding layer is selected from double-sided aluminum-plastic composite foil or copper-plastic composite foil;

[0015] The braiding layer is braided by tinned copper-tin alloy wires;

[0016] The sheath layer is selected from TPE-S or polyvinylidene fluoride.

[0017] Further, when there is a high time delay requirement, the insulating layer is selected from polyperfluoroethylene propylene foaming type.

[0018] Further, the diameter of the tinned copper-tin alloy wire selected for the braiding layer is 0.1 mm.

[0019] The utility model discloses a cable, which comprises a conductor, an insulating layer, a filling layer, a shielding layer, a braiding layer and a sheath layer. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described in connection with the embodiments with reference to the drawings.

[0021] Figure 1 It is the structural schematic drawing of the utility model. Detailed Implementation

[0022] This embodiment provides a vehicle-mounted 10 Gigabit Ethernet cable, such as Figure 1 As shown, it includes: an insulated wire pair 1, a filling layer 2, a shielding layer 3, a braided layer 4, and a sheath layer 5, which are sequentially arranged from the inside out;

[0023] Insulated wire pair 1 is composed of two wire cores 11 twisted together;

[0024] The wire core 11 includes, from the inside out: conductor 111 and insulation layer 112.

[0025] Conductor 111 is made of 7 copper-tin alloy stranded wires. Each copper-tin alloy stranded wire is made of silver-plated copper-tin alloy stranded wire, copper-clad copper-tin alloy stranded wire, or copper-plated copper-tin alloy stranded wire with a single wire diameter of 0.16mm and a tin content of 0.3%.

[0026] This copper-tin alloy has a tensile strength of over 500 MPa in the soft state, which is more than 1.5 times higher than that of existing tin-plated copper conductors of the same structural size. The relative conductivity of silver, copper and tin are 108 IACS, 100 IACS and 15.6 IACS, respectively. At high frequencies, due to the skin effect, the high-frequency resistance of the conductor 111 is much lower than that of existing tin-plated copper stranded wires. Therefore, the 10 Gigabit Ethernet cable made of the selected conductor 111 has a significantly lower metal loss at high frequencies than existing 10 Gigabit Ethernet cables.

[0027] Silver-plated copper-tin alloy stranded wire, copper-clad copper-tin alloy stranded wire, or copper-plated copper-tin alloy stranded wire can be in a soft state to obtain good bending performance.

[0028] Insulation layer 112 is made of solid polytetrafluoroethylene (FEP) or soluble polytetrafluoroethylene (PEA). If low time delay is required, polytetrafluoroethylene foam insulation can be used.

[0029] The temperature and high-frequency characteristics of solid insulation materials, such as perfluoroethylene propylene (FEP) and soluble polytetrafluoroethylene (PEA), are superior to those of modified polypropylene used in existing 10 Gigabit Ethernet cables. Therefore, they have better phase stability and lower dielectric loss, making them superior cables for transmitting 10 Gigabit and higher frequency signals in vehicles.

[0030] The insulation layer 112 is extruded with a low-pressure extrusion method to form the filler layer 2. The filler layer 2 is filled with TPE-S material with a hardness of 50-60D. With the help of a suitable release agent (such as polytetrafluoroethylene powder, which is sprayed in small amounts during cable production and can be adsorbed onto TPE-S, and is not easily visible to the naked eye in the finished product), the filler layer 2 and the insulation layer 112 not only do not stick together, but also have a small gap. When the wire is bent, the insulation pair 1 and the filler layer 2 can slide relative to each other, reducing the structural damage of the insulation pair 1 when bending.

[0031] Meanwhile, the filler layer 2 can also reduce the deformation and wrinkling of the shielding layer 3 when the cable is bent, which is conducive to maintaining a good state of return loss and unbalanced attenuation index even when the cable is bent.

[0032] The outer contour of the filling layer 2 is cylindrical, which can form a cylindrical cavity on the inner surface of the shielding layer 3, which is beneficial to improving the return loss and unbalanced attenuation index of the cable.

[0033] The shielding layer 3 is selected from double-sided aluminum-plastic composite foil or copper-plastic composite foil;

[0034] The braided layer 4 is made of tin-plated copper-tin alloy wire with a diameter of 0.1mm. The tin-plated copper-tin alloy wire is soft, with a tensile strength controlled at 500Mpa and a braiding density of ≥85%, which can provide more than 1.5 times the tensile strength of existing 10 Gigabit Ethernet cables.

[0035] The sheath layer 5 is made of TPE-S or polyvinylidene fluoride.

[0036] TPE-S material provides good tensile and compressive strength, protecting the insulated wire pair 1. Furthermore, TPE-S material has good anti-aging properties, maintaining high shape and physical properties during long-term cable use, with minimal adverse impact on the transmission performance of the insulated wire pair 1.

[0037] This invention provides a vehicle-mounted 10 Gigabit Ethernet cable, using soft silver-plated copper-tin alloy stranded wire, soft copper-clad copper-tin alloy stranded wire, or copper-plated copper-tin alloy stranded wire as the conductor, resulting in significantly lower metal loss at high frequencies compared to existing technologies. The insulation material uses perfluoroethylene propylene or soluble polytetrafluoroethylene, which has better phase stability characteristics and lower dielectric loss. The outer contour of the filler layer is designed as a cylinder, using TPE-S material with good tensile, compressive, and aging resistance properties, combined with a separating agent, which is beneficial to improving the cable's return loss and unbalanced attenuation index. At the same time, it can also reduce the deformation and wrinkling of the outer shielding layer when the cable is bent, which is beneficial to maintaining good return loss and unbalanced attenuation index even when the cable is bent. The braided layer uses soft tin-plated copper-tin alloy wire, which can provide more than 1.5 times the tensile strength of existing 10 Gigabit Ethernet cables.

[0038] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A vehicle-mounted 10-gigabit Ethernet cable, characterized by: The utility model relates to a kind of cable, including: Insulated wire pair, filling layer, shielding layer, braiding layer, sheath layer are sequentially sleeved from inside to outside; The insulated wire pair is twisted by two wire cores in full untwisting mode; The wire core sequentially includes conductor, insulation layer from inside to outside; The conductor is twisted by seven copper-tin alloy strands, and each copper-tin alloy strand selects silver-plated copper-tin alloy strand, copper-clad copper-tin alloy strand or copper-plated copper-tin alloy strand with a single wire diameter of 0.16 mm; The insulation layer selects polytetrafluoroethylene or soluble solid polytetrafluoroethylene insulation; The filling layer is filled with TPE-S material with a hardness of 50-60D, and its outer contour is cylindrical; The shielding layer selects double-sided aluminum-plastic composite foil or copper-plastic composite foil; The braiding layer is braided with tin-plated copper-tin alloy wire; The sheath layer selects TPE-S or polyvinylidene fluoride.

2. The vehicle-mounted 10-Gigabit Ethernet cable of claim 1, wherein: The insulation layer selects polytetrafluoroethylene foaming type.

3. The vehicle-mounted 10-Gigabit Ethernet cable of claim 1, wherein: The diameter of the tin-plated copper-tin alloy wire selected for the braiding layer is 0.1 mm.

Images