High-voltage transmission cable for vehicle connection

Abstract

The invention relates to the technical field of vehicle high-voltage transmission cables, and provides a high-voltage transmission cable for vehicle connection, which comprises a braided rope for ensuring the tensile property of the cable, and a buffer sleeve and a sealing sleeve arranged outside the braided rope, and the buffer sleeve and the sealing sleeve are combined to form a movable cavity for improving the flexibility of the cable; the outer insulating layer is arranged outside the sealing sleeve and wraps the conductor; the buffer sleeve and the sealing sleeve in the cable form a buffer groove, so that the toughness and the flexibility of the cable are enhanced, and the cable is convenient to arrange, disassemble and assemble. And the conductor is coated with the anti-oxidation coating, so that oxidation, moisture and acid gas erosion are prevented, and the service life is prolonged. And the braided armor layer is combined with the microporous membrane, so that mechanical protection, electromagnetic shielding and waterproof and moistureproof performances are provided, and the durability of the cable is improved. The inner sheath is made of high-temperature-resistant polyvinyl chloride and aramid fibers, so that the tensile strength and the wear resistance are enhanced, and the outer sheath is made of a wear-resistant, oil-resistant and acid and alkali-resistant polyurethane material, so that the reliability and the physical performance of the cable in a severe environment are improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle high-voltage transmission cables, and more specifically, to a high-voltage transmission cable for vehicle connection. Background Art

[0002] Vehicle high-voltage transmission cables are mainly used in electric vehicles (EVs), hybrid electric vehicles (HEVs) and other electrified vehicles to transmit high-voltage current to drive motors, charging systems and batteries. It is a key component in the vehicle electrical system, ensuring that electrical energy is efficiently and safely transmitted from the battery to various parts that require high-voltage power support;

[0003] The existing high-voltage cables still have room for improvement in electrical performance, durability and safety. Especially in the process of high-voltage transmission, how to ensure that the cables can withstand high current and high voltage while having good wear resistance, oxidation resistance and high temperature resistance is a key technical problem that needs to be solved when designing high-voltage cables. In addition, in order to ensure the structural strength, the existing vehicle high-voltage cables have a high overall hardness, which is not conducive to the cable arrangement, installation and removal.

[0004] In order to solve the above problems, the present application proposes a high-voltage transmission cable for vehicle connection. Summary of the invention

[0005] The object of the present invention is to provide a high-voltage transmission cable for vehicle connection, which solves the problems in the prior art by having a compact structure and reliable performance.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A high-voltage transmission cable for vehicle connection, comprising: a braided rope ensuring the tensile strength of the cable and a buffer sleeve and a sheath arranged outside the braided rope, wherein the buffer sleeve and the sheath are combined to form a movable cavity that improves the flexibility of the cable; an outer insulating layer is arranged outside the sheath and wraps the conductor, wherein the outer wall of the conductor is provided with an anti-oxidation coating that improves stability and is wrapped by an inner insulating layer; two layers of braided armor layers having a shielding effect and arranged outside the outer insulating layer; two layers of microporous membranes that reduce the cable density and are arranged between the two layers of braided armor layers; two layers of sheaths arranged outside the cable, including an inner sheath having the ability to improve tensile strength and wear resistance and an outer sheath having wear resistance, oil resistance, acid and alkali resistance;

[0008] The high-voltage transmission cable in the above technical solution has tensile strength, abrasion resistance, and good flexibility. The cable can effectively transmit power during vehicle operation while protecting the internal conductor from the influence of the external environment. Through reasonable structural design, the present invention provides a high-voltage cable with compact structure, reliable performance and strong adaptability, which is particularly suitable for automobiles, electric vehicles and other vehicle systems that require high-voltage power supply connection.

[0009] The buffer sleeve is tightly fitted on the outside of the braided rope by extrusion coating, and a number of support bars are evenly distributed on the outside of the buffer sleeve, and support ribs are formed at the connection between the support bars and the buffer sleeve, and a buffer groove for the active cavity is formed between two adjacent support bars and the sleeve;

[0010] In the above technical solution, a braided rope is used to enhance the tensile strength of the cable, and a buffer sleeve and a sealing sleeve are added to the outside to form an active cavity, thereby improving the flexibility and vibration resistance of the cable.

[0011] The envelope outside the buffer sleeve forms a closed-loop support inside the outer insulating layer.

[0012] The anti-oxidation coating is coated or sprayed to wrap the conductor to isolate it from oxygen;

[0013] In the above technical solution, the anti-oxidation layer can effectively isolate the oxygen in the air, prevent oxidation corrosion on the metal surface, and maintain the long-term stability and good conductivity of the cable. The use of an anti-oxidation layer coated on the cable conductor can significantly improve the long-term stability, conductivity, weather resistance and safety of the cable, and is an important measure to ensure the reliable operation of the power system.

[0014] The braided armor layer is formed by braiding metal wires with shielding effect;

[0015] In the above technical solution, the braided armor layer has the advantages of resistance to mechanical damage, waterproof and moisture-proof, anti-electromagnetic interference, and increased cable strength, thereby improving the cable's damage resistance, durability and safety.

[0016] The microporous membrane is a strip-shaped polyethylene component and is tightly formed between two layers of woven armor by spiral wrapping;

[0017] In the above technical solution, the microporous membrane has good waterproof properties, which can effectively prevent moisture from penetrating into the cable and protect the conductor from the influence of humid environment. At the same time, it has certain physical strength and can provide additional mechanical protection to prevent damage to the cable caused by external physical impact, stretching and compression.

[0018] The inner sheath is formed by overmolding high temperature resistant polyvinyl chloride with aramid fiber added on the outside of the outer braided armor layer;

[0019] In the above technical solution, aramid fiber has excellent high temperature resistance and can maintain stable physical properties in high temperature environment. High temperature resistant polyvinyl chloride can withstand higher working temperatures, usually up to 85°C to 105°C. The combination of the two can make the cable have good high temperature resistance, enhanced mechanical strength, excellent fire resistance and chemical corrosion resistance, so that vehicle cables can operate stably for a long time even in harsh environments.

[0020] The outer sheath is formed by covering the outer surface of the inner sheath with polyurethane;

[0021] In the above technical solution, the outer sheath is made of polyurethane material, which has the characteristics of wear resistance, oil resistance, acid and alkali resistance, etc., which greatly improves the durability and corrosion resistance of the cable.

[0022] The braided rope is formed by braiding a plurality of thin ropes and is tightly wrapped by the buffer sleeve;

[0023] In the above technical solution, the braided rope is woven from a plurality of fine fiber materials, which enhances the tensile strength of the cable and provides necessary mechanical support.

[0024] The support bars, support ribs and buffer grooves are all arranged along the axial direction of the cable;

[0025] In the above technical solution, this distribution method ensures the flexibility consistency of the entire cable, making the cable more flexible while ensuring strength.

[0026] Beneficial effects of the present invention:

[0027] The cable of the present invention is provided with a buffer sleeve and a sealing sleeve inside, and a buffer groove is formed inside the cable. The braided rope enhances the tensile strength of the cable, and the buffer groove ensures the toughness of the cable, so that the cable can be arranged and disassembled more flexibly.

[0028] The anti-oxidation coating applied on the outside of the conductor can effectively isolate oxygen in the air and prevent oxidation, thereby maintaining the excellent conductivity of the conductor and significantly extending the service life of the cable. The anti-oxidation layer can prevent erosion by environmental factors such as moisture and acidic gases, and enhance the durability and reliability of the cable in harsh environments;

[0029] The present invention also arranges two layers of microporous membranes between the two layers of braided armor layers. The braided armor layers ensure the strength of the cable, and the microporous membranes also provide activity space for the braided armor layers, thereby improving the toughness of the cable. The braided armor layers made of metal wires can provide strong electromagnetic shielding and mechanical protection, and the microporous membranes made of polyethylene films can supplement the shielding requirements for high-frequency signals and waterproof and moisture-proof. The two are used in combination to improve the comprehensive performance of the cable.

[0030] The present invention provides inner and outer sheaths, wherein the inner sheath is made of high-temperature resistant polyvinyl chloride and added with aramid fiber, thereby further improving the tensile strength and wear resistance of the cable; the outer sheath is made of wear-resistant, oil-resistant, acid- and alkali-resistant polyurethane material, which has excellent physical properties and can effectively prevent damage to the cable by the external environment, such as friction, mechanical impact, chemical corrosion, etc., thereby increasing the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure from a bird's-eye view;

[0034] Figure 3 It is a structural schematic diagram of the cable cross section;

[0035] Figure 4 It is a schematic diagram of the structure of a partial enlargement of the buffer sleeve;

[0036] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0037] In the figure: 1. braided rope; 2. buffer sleeve; 21. support bar; 22. support rib; 23. buffer groove; 3. envelope; 4. conductor; 5. antioxidant coating; 6. inner insulation layer; 7. outer insulation layer; 8. braided armor layer; 9. microporous membrane; 10. inner sheath; 11. outer sheath. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] like Figure 1 - Figure 4 As shown:

[0040] Example 1

[0041] This embodiment provides a structure of a high-voltage transmission cable for vehicle connection, comprising the following components:

[0042] Braided rope 1: In this embodiment, the braided rope 1 is braided from multiple fine fiber materials, which enhances the tensile strength of the cable. The braided rope 1 is tightly wrapped inside the buffer sleeve 2 to provide necessary mechanical support.

[0043] Buffer sleeve 2 and cover 3: The buffer sleeve 2 is made of highly elastic material and is wrapped around the outside of the braided rope 1 by extrusion. Several support bars 21 are evenly arranged on the outside of the buffer sleeve 2. Support ribs 22 are formed at the connection between the support bars 21 and the buffer sleeve 2, and a buffer groove 23 is formed between the two support bars 21. This design forms a movable cavity, which can effectively buffer external forces and reduce fatigue and damage of the cable;

[0044] Outer insulation layer 7: The outer insulation layer 7 is made of a material with high insulation performance to ensure the safety of the cable under high voltage environment. The outer insulation layer 7 is wrapped outside the sheath 3 to play a protective role;

[0045] Conductor 4 and anti-oxidation coating 5: The conductor 4 is made of highly conductive materials such as copper or aluminum, and its outer surface is coated with an anti-oxidation coating 5 to ensure that the conductor will not be oxidized and corroded, thus extending the service life of the cable. The inner insulation layer 6 is wrapped around the outside of the conductor 4 to play an electrical isolation role;

[0046] Braided armor layer 8: In order to increase the cable's ability to resist external damage, two layers of armor layer 8 woven from metal wires are provided on the outside. The armor layer not only has a protective effect, but also can effectively shield electromagnetic interference;

[0047] Microporous membrane 9: A strip of polyethylene microporous membrane 9 is placed between two layers of braided armor layers 8 and formed by spiral wrapping. The microporous membrane not only reduces the overall density of the cable, but also improves the heat resistance of the cable;

[0048] Sheath layer: The inner sheath 10 is made of high-temperature resistant polyvinyl chloride material reinforced with aramid fiber, which provides excellent tensile strength and high-temperature resistance; the outer sheath 11 is made of polyurethane material, which has excellent physical and chemical properties such as wear resistance, oil resistance, acid and alkali resistance, etc., ensuring the long-term stable operation of the cable in harsh environments.

[0049] Specifically, the buffer sleeve 2 is made of a rubber material with good elasticity and weather resistance, and is tightly wrapped around the outside of the braided rope 1 to ensure that the cable has sufficient flexibility during vehicle operation. The support strips 21 and buffer ribs 22 arranged outside the buffer sleeve 2 work together to form a structure with an active cavity, which can not only effectively reduce the mechanical stress of the cable when working at high voltage, but also provide better protection during intense exercise or bending.

[0050] Specifically, in order to extend the service life of the cable, this embodiment adopts the anti-oxidation coating 5 technology, and coats a layer of high-efficiency anti-oxidation material on the outside of the conductor 4 to ensure that the conductor is not damaged by oxidation under long-term high-voltage working environment. In addition, the outer two-layer braided armor layer 8 is woven from metal wire with shielding effect, which effectively prevents the influence of external electromagnetic interference on the conductor inside the cable and ensures the stability of power transmission.

[0051] Specifically, by adding aramid fiber to the inner sheath 10 and using polyurethane material for the outer sheath 11, this embodiment significantly improves the tensile strength, wear resistance, oil resistance, acid and alkali resistance of the cable. After long-term wear and corrosion resistance tests, the cable performs well in a variety of harsh environments and can meet the needs of modern transportation for high-voltage transmission cables.

[0052] It is understandable that the cable of the present invention improves performance through multiple innovative designs. The internal buffer sleeve and the sealing sleeve form a buffer groove, which enhances the toughness and flexibility of the cable and facilitates arrangement and disassembly. The conductor is coated with an anti-oxidation coating to prevent oxidation and corrosion by moisture and acidic gases, thereby extending the service life. The braided armor layer is combined with a microporous membrane to provide mechanical protection, electromagnetic shielding, and waterproof and moisture-proof properties, thereby improving the durability of the cable. The inner sheath is made of high-temperature resistant polyvinyl chloride and aramid fiber to enhance tensile strength and wear resistance, and the outer sheath uses wear-resistant, oil-resistant, acid-resistant and alkali-resistant polyurethane materials to improve the reliability and physical properties of the cable in harsh environments.

[0053] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicate orientation or positional relationship, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high voltage transmission cable for vehicle connection, characterized in that: include: A braided rope to ensure the tensile strength of the cable and a buffer sleeve and a sealing sleeve arranged outside the braided rope, wherein the buffer sleeve and the sealing sleeve are combined to form an active cavity to improve the flexibility of the cable; The outer insulating layer is arranged outside the envelope and wraps the conductor, and the outer wall of the conductor is provided with an anti-oxidation coating for improving stability and is wrapped by the inner insulating layer; Two layers of braided armor layers with shielding effect and arranged outside the outer insulating layer; Two layers of microporous membrane that reduce cable density and are placed between two layers of braided armor; The two-layer sheath arranged on the outside of the cable includes an inner sheath with improved tensile strength and wear resistance and an outer sheath with wear resistance, oil resistance, acid and alkali resistance.

2. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The buffer sleeve is tightly fitted to the outside of the braided rope by extrusion and coating, and a plurality of support bars are evenly distributed on the outside of the buffer sleeve, support ribs are formed at the connection between the support bars and the buffer sleeve, and a buffer groove for an active cavity is formed between two adjacent support bars and the sleeve.

3. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The envelope outside the buffer sleeve forms a closed-loop support inside the outer insulating layer.

4. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The anti-oxidation coating is coated or sprayed to wrap the conductor so as to isolate it from oxygen.

5. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The braided armor layer is formed by braiding metal wires with shielding effect.

6. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The microporous membrane is a strip-shaped polyethylene component and is tightly formed between two woven armor layers by spiral wrapping.

7. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The inner sheath is formed by coating the outer surface of the outer braided armor layer with high temperature resistant polyvinyl chloride added with aramid fiber.

8. A high-voltage transmission cable for vehicle connection according to claim 7, characterized in that: The outer sheath is formed by covering the outer portion of the inner sheath with polyurethane.

9. A high-voltage transmission cable for vehicle connection according to claim 1, characterized in that: The braided rope is formed by braiding a plurality of thin ropes and is tightly wrapped by the buffer sleeve.

10. A high voltage transmission cable for vehicle connection according to claim 2, characterized in that: The support bars, support ribs and buffer grooves are all arranged along the axial direction of the cable.

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