CN214476634U

CN214476634U - High-voltage cable for new energy vehicle

Info

Publication number: CN214476634U
Application number: CN202120790451.5U
Authority: CN
Inventors: 程俊龙; 杨平平; 李磊; 陈虓宇
Original assignee: Tianjin Fuxin Automobile Cable Co ltd
Current assignee: Tianjin Fuxin Automobile Cable Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-10-22
Anticipated expiration: 2031-04-16

Abstract

The utility model discloses a high tension cable for new energy vehicle belongs to cable technical field, its characterized in that: the air guide tube is arranged in the center, and a conductor layer, a non-woven fabric wrapping layer and an extrusion layer are sequentially arranged on the outer side of the air guide tube; the gas guide pipe is sequentially provided with a gas guide layer, an armor layer and a protective layer from inside to outside, the conductor layer comprises a bundle twisting unit, the bundle twisting unit is twisted to form a complex twisting unit, and the complex twisting unit is twisted to form the conductor layer. High tension cable puts the air duct that has through cable self central point and takes away the heat that the conductor is inside to produce because of conduction current to this improves the current-carrying capacity of cable and reduces the impact ageing that the electric current increase brought the cable insulation layer because of the short circuit. The utility model discloses an improve the current-carrying capacity of cable, increase the life-span of cable, can reduce the conductor cross-section, and then reach the lightweight of cable and reduce the purpose that the copper product consumed.

Description

High-voltage cable for new energy vehicle

Technical Field

The utility model belongs to the technical field of the cable, especially, relate to a high tension cable for new energy vehicle.

Background

Currently, most of the power of the motor vehicles still needs to be supplied by oil or gas. Oil and gas are non-renewable energy sources, the phenomenon of energy exhaustion is becoming more and more serious with the aggravation of oil and gas use and dependence, and serious environmental pollution can be caused in the oil and gas use process. The new energy automobile uses electric energy as a power source, the new energy automobile industry in China is a top-grade in the automobile industry, and through the development of over ten years, the new energy automobile industry in China already forms a relatively complete technical system, a product system, a standard system and a management system, and the new energy automobile is determined as a leading direction of future development of the automobile industry in China.

The electric power driving and controlling system is the core of the electric automobile, and the electric power is transmitted through the high-voltage cable in the automobile, so the high-voltage cable in the automobile is of self-evident importance as the core component of the power transmission and distribution.

The high-voltage cable used by the new energy automobile mainly adopts three temperature grades of 125 ℃, 150 ℃ and 175 ℃, the current-carrying capacity of the cable is limited by the highest working temperature of the cable, the current of the cable heats a conductor in the process of transmitting the current, and the current-carrying capacity of the cable is seriously weakened by the rise of the temperature. Therefore, it is necessary to design a high-voltage cable with good heat dissipation function for a new energy automobile.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a solve high tension cable for new energy automobile that current high tension cable heat dispersion is poor, easily receive the ageing scheduling problem of electric current impact for the new energy automobile.

The utility model relates to a realize like this, a high tension cable for new energy vehicle, its characterized in that: the air guide tube is arranged in the center, and a conductor layer, a non-woven fabric wrapping layer and an extrusion layer are sequentially arranged on the outer side of the air guide tube; the gas guide pipe is sequentially provided with a gas guide layer, an armor layer and a protective layer from inside to outside, the conductor layer comprises a bundle twisting unit, the bundle twisting unit is twisted to form a complex twisting unit, and the complex twisting unit is twisted to form the conductor layer.

High tension cable puts the air duct that has through cable self central point and takes away the heat that the conductor is inside to produce because of conduction current to this improves the current-carrying capacity of cable and reduces the impact ageing that the electric current increase brought the cable insulation layer because of the short circuit. The utility model discloses an improve the current-carrying capacity of cable, increase the life-span of cable, can reduce the conductor cross-section, and then reach the lightweight of cable and reduce the purpose that the copper product consumed.

In the above technical solution, preferably, the gas conducting layer and the protective layer are fluoroplastic layers.

In the above technical solution, preferably, the armor layer is formed by weaving aramid fibers or metal wires.

In the above technical solution, preferably, the twisted wires constituting the conductor layer are twisted in the same direction by the complex twisting unit.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, an air guide layer; 2. an armor layer; 3. a protective layer; 4. a conductor layer; 4-1, a bundle twisting unit; 4-2, a complex twisting unit; 5. a non-woven fabric wrapping layer; 6. extruding the coating.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

For solving current new energy automobile high tension cable heat dispersion poor, easily receive the ageing scheduling problem of electric current impact, the utility model particularly provides a new energy automobile high tension cable, this cable heat dispersion is good, and the current-carrying ability is strong, and the quality is light and consume that copper is few. For further explanation of the structure of the present invention, the following detailed description is made with reference to the accompanying drawings:

referring to fig. 1, a high-voltage cable for a new energy vehicle includes a central air duct, which is a central tube coaxial with the cable. The air duct is from inside to outside in proper order air guide layer 1, armor 2 and inoxidizing coating 3. The air guide layer 1 is made of soft-grade fluoroplastic with the hardness of 65 +/-3 through a high-temperature extruder, the thickness range of the air guide layer 1 is 0.5-1.0mm, the outer diameter is determined according to the conductor section of the high-voltage cable, the extrusion temperature of the high-temperature extruder is 350-420 ℃, and the extruder is used for once extrusion and cooling molding.

The armor layer 2 is formed by weaving aramid fibers or metal wires. Specifically, after the air guide layer 1 is extruded, cooled and formed, aramid fibers or metal wires are woven by a 2-layer-2-by-layer weaving machine to serve as reinforced armoring, and the weaving machine is a 16-spindle and 24-spindle vertical weaving machine. The armor layer 2 plays the role of improving the strength and the support of the air duct, and can ensure that the air duct does not deform under the state of bearing air pressure and in a limited space extrusion environment.

After the armor layer 2 is woven, a high-temperature extruder is adopted to produce the protective layer 3, and the thickness of the protective layer 3 is usually 0.1-0.3 mm.

The air duct with the three-layer structure adopts a reinforcing structure, so that the pressure bearing capacity of the air duct can be ensured, the pressure bearing capacity is greater than 5Mpa, and meanwhile, an effective supporting function can be provided during bending, so that the air duct is not deformed under the bending radius of 3-5 times, and the smooth air flow is ensured.

The air duct outside is equipped with conductive layer 4, non-woven fabrics in proper order around covering 5 and crowded package 6. The air duct is used as a pipeline for air circulation in the high-voltage cable, and has the characteristics of softness, high strength and high temperature resistance. The head end and the tail end of the air duct can be led out from the side parts of the two ends of the high-voltage cable. The circulating air can utilize an air exchange system of an automobile or an air circulation system which is independently configured to take away heat generated when the cable transmits current, reduce the temperature in the cable, reduce the rise of conductor resistance caused by the temperature and improve the current carrying capacity under the double functions of reducing the temperature and reducing the conductor resistance.

By adopting the air duct structure, heat in the conductor is taken away through circulation of the cooling medium in the air duct, the resistance of the conductor is inhibited from being increased due to temperature, and the current carrying capacity of the cable is improved, wherein for a 175-DEG C product, the current carrying capacity of the cable is improved by 1.05-1.35 times when the temperature is reduced by 10 ℃.

The conductor layer 4 comprises a bundle twisting unit 4-1, the bundle twisting unit 4-1 is twisted to form a complex twisting unit 4-2, and the complex twisting unit 4-2 is twisted to form the conductor layer 4. Specifically, the bundle twisting unit 4-1 is a conductor monofilament with the diameter of 0.15mm-0.21mm, the bundle twisting units 1+6 are twisted in the same direction to form a compound twisting unit 4-2 with the pitch diameter ratio of 7-9 times, and by optimizing the pitch diameter ratio, conductor gaps are reduced to the maximum extent, the roundness of the conductor layer 4 is improved, and the outer diameter is reduced. Compared with the traditional high-voltage cable, the thin conductor monofilaments are adopted in the embodiment, the flexibility and the structural stability of the cable are excellent, and the bending radius of the cable is smaller than 5 times of the outer diameter of the cable.

The compound twisting unit 4-2 is used as a folded yarn of the conductor layer, and is twisted into the conductor layer 4 in the same direction, so that the flexibility of the conductor is guaranteed, the outer diameter of the conductor is reduced to the maximum extent, and the installation size is reduced. The compound twisting unit 4-2 is manufactured by a 630 high-speed twisting machine, the compound twisting unit 4-2 is used as a raw material to perform secondary twisting and then perform equidirectional twisting by using untwisted cage twisting equipment, the air guide tube is placed at the center of the conductor during cage twisting, all the conductors are evenly distributed around the air guide tube, and the structure is round, compact and stable. By adopting the mode of twisting in the same direction, the outer diameter of a cable product can be reduced by 7-10%, the direct contact resistance and twisting coefficient of a conductor are reduced by twisting in the same direction, and the consumption of copper materials is reduced by 1-2% on the premise of meeting the resistance.

Adopt the non-woven fabrics to overlap outward in the conductor layer 4 and wrap formation non-woven fabrics around covering 5, improve the stability of conductor.

Under the condition that the sections of the conductor layers 4 are the same, in the cable described in the embodiment, the direct current resistance and the copper material consumption of the conductor can be properly reduced, the surface roundness and the surface quality of the stranded conductor layer can be effectively improved, and the outer diameter of the conductor layer can be reduced. The electrical property comprehensive comparative analysis is carried out on the high-voltage flexible cable which is stranded commonly, and the stranding mode of the conductor layer in the embodiment is considered to enable the electric field on the surface of the conductor to be uniform, so that the improvement of the comprehensive electrical property of the high-voltage cable is facilitated.

The extrusion layer 6 is made of high-temperature-resistant flexible material, is formed by one-time extrusion, two kinds of insulation materials can be selected, the cable with the temperature grade of 125 ℃ and 150 ℃ adopts cross-linked polyolefin, and an electron accelerator is adopted for irradiation cross-linking to complete the conversion of the molecular structure from a linear structure to a net structure. The cable with the temperature grade of 175 ℃ adopts a silicon rubber insulating material and completes the vulcanization process through a hot air vulcanization furnace. After the two materials are crosslinked and vulcanized by different processes, the temperature grade is determined, and the chemical resistance and the mechanical property of the cable are obviously improved.

The following chart is a comparison table of the cable temperature rise and current-carrying capacity data described in this embodiment:

this scheme the cable can adopt the air duct of different internal and external diameters according to the structure of the demand adjustment conductor strand of the operating mode of reality, through adjusting the inside flow of air duct and pressure, realizes temperature regulation, and the suitability of product is stronger. The following sets out several adjustment mode corresponding parameters:

the above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a high tension cable for new forms of energy vehicle which characterized in that: the air guide tube is arranged in the center, and a conductor layer (4), a non-woven fabric wrapping layer (5) and an extrusion coating layer (6) are sequentially arranged on the outer side of the air guide tube; the air guide pipe is sequentially provided with an air guide layer (1), an armor layer (2) and a protective layer (3) from inside to outside, the conductor layer (4) comprises a bundle twisting unit (4-1), the bundle twisting unit (4-1) is twisted to form a complex twisting unit (4-2), and the complex twisting unit (4-2) is twisted to form the conductor layer (4).

2. The high-voltage cable for a new energy vehicle according to claim 1, characterized in that: the gas guide layer (1) and the protective layer (3) are fluoroplastic layers.

3. The high-voltage cable for a new energy vehicle according to claim 2, characterized in that: the armor layer (2) is formed by weaving aramid fibers or metal wires.

4. The high-voltage cable for a new energy vehicle according to claim 1, characterized in that: the compound twisting units (4-2) are twisted in the same direction to form the folded yarn of the conductor layer (4).