High-voltage transmission cable of electric automobile

Abstract

The utility model discloses a high-voltage transmission cable of an electric automobile, which comprises a central conductor and an insulating layer wrapping the outer side of the central conductor, the central conductor is a flat copper bar or aluminum bar, at least one hole for a cable to penetrate is arranged in the central conductor, and the insulating layer wraps the central conductor. And the holes extending along the length direction of the central conductor penetrate through the end surfaces of the two ends of the central conductor. According to the utility model, stable transmission of high voltage is realized, light weight is realized, installation and laying are convenient, a laying space with protection can be provided for other cables and / or a channel is provided for transmission of a liquid cooling medium so as to reduce the current-carrying heating temperature of the conductor, and different application requirements are satisfied.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a high-voltage transmission cable for electric vehicles. Background Art

[0002] With the increasing shortage of oil energy reserves, new energy vehicles have become an important scientific research project, such as pure electric vehicles, extended-range electric vehicles, hydrogen engine vehicles, etc. At present, the cables used in new energy vehicles are numerous and messy, which is troublesome to lay and takes up a lot of space, making it difficult to meet the design requirements of lightweight. Utility Model Content

[0003] The utility model aims to provide a high-voltage transmission cable for an electric vehicle, which can realize light weight and be easy to install and lay while realizing stable transmission of high voltage.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a high-voltage transmission cable for an electric vehicle, comprising: a central conductor and an insulating layer coated on the outside of the central conductor, the central conductor being a flat copper bar or aluminum bar, the central conductor having at least one hole for the cable to pass through, the hole extending along the length direction of the central conductor penetrating the end faces at both ends of the central conductor.

[0005] The further improved scheme in the above technical scheme is as follows:

[0006] 1. In the above solution, the holes are circular holes or square holes.

[0007] 2. In the above solution, the hole can be used for low-voltage cables or signal cables to pass through.

[0008] 3. In the above solution, one of the holes is provided at one end of the end surface of the central conductor.

[0009] 4. In the above solution, the two holes are respectively arranged at two ends of the end surface of the central conductor.

[0010] 5. In the above solution, the insulating layer is a nylon insulating layer or a polyolefin insulating layer or a silicone rubber insulating layer.

[0011] 6. In the above solution, the thickness of the insulating layer is 0.5 mm to 1.2 mm.

[0012] 7. In the above solution, the hole can be used for transmitting liquid cooling medium or inserting a hose.

[0013] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0014] The utility model discloses a high-voltage transmission cable for electric vehicles, wherein the central conductor is a flat copper bar or aluminum bar, wherein at least one hole is provided inside the central conductor for the cable to pass through, and the hole extending along the length direction of the central conductor penetrates the end faces at both ends of the central conductor, thereby realizing stable transmission of high voltage while being lightweight and easy to install and lay, and also providing a protective laying space for other cables and / or providing a channel for the transmission of liquid cooling medium to reduce the current-carrying heating temperature of the conductor, thereby meeting different application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a structural schematic diagram of Embodiment 1 of the high-voltage transmission cable for electric vehicles of the utility model;

[0016] Attached Figure 2 This is a schematic structural diagram of Example 2 of a high-voltage transmission cable for an electric vehicle according to the utility model.

[0017] In the above figures: 1. center conductor; 2. insulation layer; 3. hole. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A high-voltage transmission cable for an electric vehicle, comprising: a central conductor 1 and an insulating layer 2 coated on the outer side of the central conductor 1, wherein the central conductor 1 is a flat copper bar, and the central conductor 1 has at least one hole 3 for a cable to pass through, and the hole 3 extending along the length direction of the central conductor 1 passes through the end faces of both ends of the central conductor 1;

[0020] The center conductor is a flat copper busbar, which can be bent according to the actual installation scenario.

[0021] After the bending is completed, the cable is inserted through the hole opened on the center conductor, and then during processing, the hole side is stamped and shaped, and subsequent screw connection or ultrasonic welding is performed, which can provide a protected laying space for other cables to meet different application requirements.

[0022] The above-mentioned hole 3 is a circular hole.

[0023] The hole 3 can be used for low-voltage cables to pass through.

[0024] The two holes 3 are respectively disposed at two ends of the end surface of the central conductor 1 .

[0025] The above-mentioned insulating layer 2 is a nylon PA12 insulating layer;

[0026] The nylon PA12 material used is resistant to alkali, oil, enzymes, inorganic dilute acids, aromatics, etc. It has good impact resistance and chemical stability. It is also a good electrical insulator and, like other polyamides, its insulation properties will not be affected by moisture.

[0027] The thickness of the insulating layer 2 is 1.0 mm.

[0028] Embodiment 2: A high-voltage transmission cable for an electric vehicle, comprising: a central conductor 1 and an insulating layer 2 coated on the outer side of the central conductor 1, wherein the central conductor 1 is a flat aluminum bar, and the central conductor 1 has at least one hole 3 for a cable to pass through, and the hole 3 extending along the length direction of the central conductor 1 passes through the end faces of both ends of the central conductor 1;

[0029] The use of flat aluminum bars can not only be better bent according to the actual laying scenario, but also achieve lightweight and automated installation and laying, thereby facilitating installation and laying and reducing the required laying space while achieving stable transmission of high voltage.

[0030] The above-mentioned hole 3 is a square hole.

[0031] The hole 3 is for signal cables to pass through.

[0032] The hole 3 is disposed at one end of the end surface of the center conductor 1 .

[0033] The above-mentioned insulating layer 2 is a polyolefin XLPO insulating layer;

[0034] It uses a new type of low-smoke, halogen-free cross-linked polyolefin material with a temperature resistance grade of 150°C. Its hardness is 93±2A, its elongation at break is greater than 400%, and its tensile strength is greater than 12MPa. It has the properties of resistance to paint and solvent, high-temperature bending and cracking, and good high-temperature pressure performance, which improves the product's breakdown voltage.

[0035] The thickness of the insulating layer 2 is 0.9 mm.

[0036] Embodiment 3: A high-voltage transmission cable for an electric vehicle, comprising: a central conductor 1 and an insulating layer 2 coated on the outer side of the central conductor 1, wherein the central conductor 1 is a flat aluminum bar, and the central conductor 1 has at least one hole 3 for a cable to pass through, and the hole 3 extending along the length direction of the central conductor 1 passes through the end faces of both ends of the central conductor 1;

[0037] The use of flat aluminum bars can not only be better bent according to the actual laying scenario, but also achieve lightweight and automated installation and laying, thereby facilitating installation and laying and reducing the required laying space while achieving stable transmission of high voltage.

[0038] The above-mentioned hole 3 is a square hole.

[0039] The holes 3 can be used for transmission of liquid cooling medium.

[0040] The hole 3 is disposed at one end of the end surface of the center conductor 1 .

[0041] The above-mentioned insulating layer 2 is a silicone rubber insulating layer, which adopts a new silicone rubber insulating material with a temperature resistance grade of 180°C, has a hardness of 80±2A, an elongation at break greater than 250%, and a tensile strength greater than 8MPa. It has high-temperature bending and crack resistance, good high-temperature pressure performance, and improves the product's breakdown voltage resistance.

[0042] The thickness of the insulating layer 2 is 1.2 mm.

[0043] Embodiment 4: A high-voltage transmission cable for an electric vehicle, comprising: a central conductor 1 and an insulating layer 2 wrapped around the outer side of the central conductor 1, wherein the central conductor 1 is a flat aluminum bar, and the central conductor 1 is provided with at least one hole 3 for the cable to pass through, and the hole 3 extending along the length direction of the central conductor 1 passes through the end faces of both ends of the central conductor 1.

[0044] The above-mentioned hole 3 is a circular hole.

[0045] The holes 3 can be used for the transmission of dimethyl silicone oil or other insulating oils.

[0046] The two holes 3 are respectively disposed at two ends of the end surface of the central conductor 1 .

[0047] Further explanation of the embodiment:

[0048] The central conductor of the high-voltage transmission cable of the electric vehicle of the present patent adopts a flat copper bar or aluminum bar. The flat shape can be better bent according to the actual laying scene, and the flat aluminum bar can achieve lightweight and automated installation and laying, thereby facilitating installation and laying and reducing the required laying space while achieving stable transmission of high voltage;

[0049] After the bending is completed, the cable is inserted through the hole opened on the center conductor, and then during processing, the hole side is stamped and shaped, and subsequent screw connection or ultrasonic welding is performed, which can provide a protected laying space for other cables to meet different application requirements;

[0050] The insulation layer adopts nylon PA12 material or polyolefin XLPO material, silicone rubber insulation material. Among them, the nylon PA12 material adopted is resistant to alkali, oil, enzyme, inorganic diluted acid, aromatic hydrocarbon, etc., has good impact resistance and chemical stability, is also a good electrical insulator and will not be affected by moisture like other polyamides. The new low-smoke halogen-free cross-linked polyolefin material with a temperature resistance grade of 150°C is adopted. Its hardness is 93±2A, the elongation at break is greater than 400%, the tensile strength is greater than 12MPa, it has the properties of paint immersion and solvent resistance, high temperature bending crack resistance, good high temperature pressure performance, and improves the product's breakdown voltage resistance.

[0051] When the high-voltage transmission cable of the above-mentioned electric vehicle is used, it can realize stable transmission of high voltage while being lightweight and easy to install and lay. It can also provide a protected laying space for other cables and / or provide a channel for the transmission of liquid cooling medium to reduce the current-carrying heating temperature of the conductor to meet different application requirements.

[0052] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-voltage transmission cable for an electric vehicle, comprising: A central conductor (1) and an insulating layer (2) covering the outer side of the central conductor (1), characterized in that: the central conductor (1) is a flat copper bar or aluminum bar, the central conductor (1) is provided with at least one hole (3) for a cable to pass through, and the hole (3) extending along the length direction of the central conductor (1) passes through the end faces of both ends of the central conductor (1).

2. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: The hole (3) is a circular hole or a square hole.

3. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: The hole (3) can be used for a low-voltage cable or a signal cable to pass through.

4. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: One of the holes (3) is arranged at one end of the end surface of the central conductor (1).

5. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: The two holes (3) are respectively arranged at two ends of the end surface of the central conductor (1).

6. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: The insulating layer (2) is a nylon insulating layer or a polyolefin insulating layer or a silicone rubber insulating layer.

7. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: The thickness of the insulating layer (2) is 0.5 mm to 1.2 mm.

8. The high-voltage transmission cable for electric vehicles according to claim 1, characterized in that: The hole (3) can be used for transmitting liquid cooling medium or for inserting a rubber hose.

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