Light-weight high-strength high-temperature-resistant electric wire for automobile

Abstract

The utility model discloses a light-weight high-strength high-temperature-resistant wire for an automobile, which relates to the technical field of automobile cables and comprises a conductor assembly and an automobile wire with the cross section area of 0.22 mm < 2 > formed by twisting seven low-annealed hard copper monofilaments with the outer diameter of 0.20 mm in a regular twisting mode. Compared with annealed soft copper, the copper weight per unit is reduced by about 1 / 3, the weight of the automobile wire is greatly reduced, the weight of the whole automobile is reduced, the oil consumption and carbon emission of the automobile are reduced, the use cost is reduced, and the coating layer A adopts a polyester film, so that the wire has high tensile strength, impact resistance and bending resistance are improved, and the service life of the wire is prolonged. The coating layer B adopts a halogen-free flame-retardant belt, the oxygen index is high, the flame retardance of the product is further improved, the safety is improved, the insulating layer adopts a modified polypropylene material, the flame retardance of the product is good, and the temperature resistance grade reaches 125 DEG C. And wire aging or damage caused by excessive heat generated by increase of conductor resistance can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cables, in particular to a light, high-strength, high-temperature-resistant electric wire for automobiles. Background Art

[0002] As the Chinese government proposed at the 75th United Nations General Assembly: "China will increase its national independent contribution, adopt more powerful policies and measures, strive to peak carbon dioxide emissions before 2030, and strive to achieve carbon neutrality by 2060." With the introduction of the concept of carbon neutrality, the optimization of industrial structure and energy structure has also followed. The emission problem of traditional fuel vehicles has also been paid attention to. According to historical records, for every 100KG weight reduction on a car, an average of 0.35L fuel can be saved and 900g of carbon dioxide emissions can be reduced per 100 kilometers. This has also prompted the lightweight production of automobiles to become increasingly popular. As a part of the car, according to statistics, each car contains an average of 1,000 meters of cable, which means that reducing the weight of automobile cables will also improve automobile emissions.

[0003] However, most existing automotive cables are made of annealed soft copper. In order to ensure that the cable tensile strength meets the standard, its cross-sectional area is often designed to be 0.35mm 2 The larger cross-sectional area leads to heavier weight of existing automotive cables, which indirectly increases the fuel consumption and carbon emissions of the vehicle, increases the cost of use and causes greater pollution to the environment. Utility Model Content

[0004] The purpose of the utility model is to provide a lightweight, high-strength, high-temperature-resistant electric wire for automobiles to solve the technical problems mentioned in the above background technology.

[0005] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0006] A lightweight, high-strength, high-temperature-resistant wire for automobiles.

[0007] The conductor assembly includes seven low-annealed hard copper monofilaments, and the seven low-annealed hard copper monofilaments are twisted by a regular twisting method, and the outer diameter of each low-annealed hard copper monofilament is 0.20 mm, and the combined cross-sectional area is 0.22 mm 2 ;

[0008] The invention comprises a sheath component, wherein the sheath component comprises a coating layer A wrapped around the outer surface of the conductor component, a coating layer B wrapped around the outer surface of the coating layer A, and an insulating layer wrapped around the outer surface of the coating layer B.

[0009] As a further solution of the utility model: the coating layer A is a single-layer polyester film.

[0010] As a further solution of the utility model: the coating layer B is a single-layer halogen-free flame retardant tape.

[0011] As a further solution of the utility model: the material of the insulating layer is modified polypropylene.

[0012] Beneficial effects of the utility model:

[0013] The utility model adopts seven low annealed hard copper monofilaments with an outer diameter of 0.20mm, which are twisted by a regular twisting method to form a cross-sectional area of ​​0.22mm. 2 The automotive wires of this kind, while ensuring that their tensile strength meets the standard, have a unit copper weight reduced by about 1 / 3 compared to annealed soft copper automotive wires, which greatly reduces the weight of automotive wires, thereby reducing the weight of the entire vehicle, reducing the fuel consumption and carbon emissions of the vehicle, and thus reducing the cost of use. The coating layer A is made of polyester film, which gives the wires high tensile strength, increased impact resistance and bending resistance. The coating layer B is made of halogen-free flame retardant tape with a high oxygen index, which further improves the flame retardancy of the product and increases safety. The insulation layer is made of modified polypropylene material, which has good flame retardancy and a temperature resistance of 125°C. It can effectively prevent the aging or damage of the wires caused by the excess heat generated by the increased conductor resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the device in the utility model;

[0016] Figure 2 It is an enlarged schematic diagram of the sheath component in the utility model.

[0017] In the figure: 1. conductor assembly; 2. sheath assembly; 21. coating layer A; 22. coating layer B; 23. insulation layer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-2 As shown, a lightweight, high-strength, high-temperature resistant wire for automobiles,

[0020] The conductor assembly 1 includes seven low-annealed hard copper monofilaments, and the seven low-annealed hard copper monofilaments are twisted by a regular twisting method, and the outer diameter of each low-annealed hard copper monofilament is 0.20mm, 0.20mm, and the combined cross-sectional area is 0.22mm 2 , 0.22mm 2 The cross-sectional area of ​​the automotive conductor unit copper weight is about 1.98g / m; and 0.35mm 2 The cross-sectional area of ​​annealed soft copper automotive wire unit copper weight is about 3g / m, by using 0.22mm 2 Low cross-sectional area annealed hard copper monofilament automotive wire replacement 0.35mm 2 The cross-sectional area of ​​annealed soft copper automotive conductor can reduce the unit copper weight by about 1 / 3, greatly reducing the weight of automotive cables and promoting lightweighting of automobiles. In addition, the material of low annealed hard copper can well compensate for the disadvantage of reduced tensile strength after the cross-sectional area is reduced, making 0.22mm 2 The tensile strength of low annealed hard copper monofilament automotive wire with a cross-sectional area equivalent to 0.35mm 2 Cross-sectional area of ​​annealed soft copper automotive wire.

[0021] It comprises a sheath component 2, which comprises a coating layer A21 wrapped around the outer surface of the conductor component 1, a coating layer B22 wrapped around the outer surface of the coating layer A21, and an insulating layer 23 wrapped around the outer surface of the coating layer B22.

[0022] In the present embodiment, specifically, the coating layer A21 is a single-layer polyester film. The mechanical properties of polyester film are the strongest among thermoplastics. Its tensile strength is comparable to that of aluminum foil, which is 0.33 to 0.5 times that of steel and 9 times that of polyethylene film. Its impact strength is 3 to 5 times that of other plastic films. In addition, polyester film has good heat resistance. The long-term use temperature can reach 115°C, and it can also be used for a short time at 150°C. The use of polyester film to coat annealed hard copper monofilament can greatly reduce the high temperature effect caused by the increase in resistance due to the decrease in the cross-sectional area of ​​the annealed hard copper monofilament, which causes the cable to heat up. At the same time, it has excellent impact resistance and mechanical strength, further enhances the tensile strength of hard copper, and makes up for the disadvantage that hard copper wire is not resistant to bending.

[0023] In this embodiment, specifically, the coating layer B22 is a single-layer halogen-free flame retardant tape. The halogen-free flame retardant tape is made on glass fiber cloth, dipped in a composite high flame retardant, halogen-free adhesive, and cured. The oxygen index is generally greater than 50, which can greatly reduce the risk of combustion caused by heating of the wires. At the same time, it is halogen-free and environmentally friendly.

[0024] In this embodiment, specifically, the material of the insulating layer 23 is modified polypropylene, which is a blend of polypropylene and ethylene acrylic acid. The heat resistance of modified polypropylene is better than that of polyvinyl chloride material, and it can better bear the heat caused by the increase in resistance. When polyvinyl chloride insulation is used: at a working temperature of 30°C, 0.22mm 2 Line current carrying capacity 8.03A; 100℃ working temperature, 0.22mm 2 The current carrying capacity of the cable is 2.07A, and when modified polypropylene is used: at a working temperature of 30°C, the current carrying capacity of 0.22 modified polypropylene is 9.204A; at a working temperature of 100°C, the current carrying capacity of 0.22 modified polypropylene is 4.72A. Therefore, using modified polypropylene as the insulating layer 23 can further improve the current carrying capacity of the cable, and also make the cable have good flame retardancy resistance and high temperature resistance.

[0025] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A lightweight, high-strength, high-temperature-resistant electric wire for automobiles, characterized in that: The conductor assembly (1) comprises seven low-annealed hard copper monofilaments, and the seven low-annealed hard copper monofilaments are twisted together in a regular twisting manner, each low-annealed hard copper monofilament has an outer diameter of 0.20 mm and a combined cross-sectional area of ​​0.22 mm. 2 ; The invention comprises a sheath component (2), wherein the sheath component (2) comprises a coating layer A (21) wrapped around the outer surface of a conductor component (1), a coating layer B (22) wrapped around the outer surface of the coating layer A (21), and an insulating layer (23) wrapped around the outer surface of the coating layer B (22).

2. A lightweight, high-strength, high-temperature-resistant electric wire for automobiles according to claim 1, characterized in that: The coating layer A (21) is a single-layer polyester film.

3. A lightweight, high-strength, high-temperature-resistant electric wire for automobiles according to claim 1, characterized in that: The coating layer B (22) is a single-layer halogen-free flame retardant tape.

4. A lightweight, high-strength, high-temperature-resistant electric wire for automobiles according to claim 1, characterized in that: The material of the insulating layer (23) is modified polypropylene.

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