Alternating current charging seat tensile cable for new energy automobile

Abstract

The utility model relates to the field of cables, in particular to an alternating current charging seat tensile cable for a new energy automobile. The tensile cable comprises a plurality of conductors and a protective layer wrapping the peripheries of the conductors. The protective layer structurally comprises an insulating layer, an isolating layer, a tensile layer and a sheath layer from inside to outside. The conductor is formed by twisting oxygen-free metal copper wires; the insulating layer wraps the conductor and is made of a hard ethylene propylene rubber material with a corresponding temperature grade, and the insulation concentricity is greater than or equal to 80%; the isolating layer is filled in gaps and outer layers of the conductors with the insulating layers, the isolating layer is made of TPU materials with corresponding temperature grades, the concentricity is greater than or equal to 70%, the tensile layer is wrapped outside the isolating layer, the tensile layer is made of tensile fibers, and the weaving density is 90%; and the sheath layer is wrapped outside the tensile layer and is made of a TPU material with a corresponding temperature grade, and the concentricity is greater than or equal to 70%. The cable can replace a traditional new energy automobile charging AC cable, is stable in performance and advanced in technology, and belongs to a low-smoke halogen-free flame-retardant green product.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a tensile cable for an AC charging seat used in new energy vehicles. Background Art

[0002] In recent years, domestic new energy vehicles have entered a stage of steady development. In order to better promote the healthy development of the new energy vehicle market, the country has repeatedly proposed to build a high-quality charging infrastructure system. As a key connection device between car piles and new energy vehicles in the charging process, the new energy vehicle charging seat plays an indispensable role. It charges the battery pack through its internal AC connection line and provides endurance power for the vehicle. Along with the development opportunities of the domestic new energy market, the market share of charging seat cables has continued to expand.

[0003] In this fiercely competitive market, charging cable manufacturers are trying to attract end customers and expand their market share by continuously lowering product prices. However, the ignition of the price war will inevitably lead some suppliers to sacrifice product quality and use low-cost materials and manufacturing processes to produce charging cable products. Even if some products meet the requirements of pre-production inspections, it is difficult to guarantee safety and reliability during the actual charging process, and the product life is also short.

[0004] The prior art has the following problems:

[0005] 1. The cable structure is a PP filling structure. The cable is prone to bulging and cracking under frequent bending;

[0006] 2. The insulation layer is a single plastic structure. In the case of frequent bending, the conductor is easy to pierce the insulation layer;

[0007] 3. Due to reason 1, in order to ensure the current carrying capacity of the cable, the conductor cross-section of the cable must be increased, which increases the cost;

[0008] 4. The sheath layer is a single plastic structure. In the case of high temperature in summer, the material is prone to oil leakage. In the case of low temperature in winter, the cable material becomes hard as the temperature drops, and the sheath is prone to cracking.

[0009] 5. It does not have a tensile structure and the cable cannot be stretched frequently.

[0010] Considering the market requirements for the characteristics of charging base cables, there is an urgent need for a charging base AC cable that is tensile-resistant, highly flexible, and has excellent mechanical properties. Utility Model Content

[0011] In view of the shortcomings or deficiencies of the above-mentioned prior art, the utility model provides a tensile cable for an AC charging seat for new energy vehicles, which can replace traditional new energy vehicle charging AC cables, has stable performance, advanced technology, and is a low-smoke, halogen-free, flame-retardant, green product.

[0012] The purpose of this utility model is achieved through the following technical solutions:

[0013] A tensile cable for an AC charging station for a new energy vehicle comprises a plurality of conductors and a protective layer wrapped around the conductors, wherein the protective layer has a structure from inside to outside of: an insulating layer, an isolation layer, a tensile layer, and a sheath layer;

[0014] The conductor is made of oxygen-free metal copper wires twisted together, the number of copper wires in the conductor is between 7 and 300, and the diameter of a single copper wire is between 0.12 and 0.50 mm;

[0015] The insulating layer is wrapped around the outside of the conductor and is made of hard EPDM rubber material of corresponding temperature grade, and the insulation concentricity is ≥80%;

[0016] The isolation layer is filled in the gaps and outer layer of several conductors with insulating layers, and is made of TPU material of corresponding temperature grade, with concentricity ≥ 70%;

[0017] The tensile layer is wrapped outside the isolation layer and is made of tensile fiber with a weaving density of 90%;

[0018] The sheath layer is wrapped around the outside of the tensile layer and is made of TPU material of corresponding temperature grade, with concentricity ≥ 70%.

[0019] The beneficial effects of the utility model are:

[0020] 1. By extruding hard EPDM rubber as the insulation layer, the excellent insulation performance of the core is ensured while the temperature resistance level of the cable is improved, and the insulation material is not easily deformed by heat;

[0021] 2. The isolation layer is produced by extruding the cable structure, which strengthens the stability of the internal core and increases the overall strength of the cable;

[0022] 3. By weaving the tensile layer, the tensile performance of the cable is increased while ensuring the stability of the structure;

[0023] 4. By extruding TPU as the sheath layer, the cable's excellent mechanical properties are ensured while improving its anti-friction performance and being able to withstand harsh environments; BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the tensile cable of the utility model; DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0026] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0027] See also Figure 1 The illustrated tensile cable for an AC charging station for a new energy vehicle includes a plurality of conductors 10 and a protective layer wrapped around the conductors 10. The protective layer has a structure from inside to outside of: an insulating layer 20, an isolation layer 30, a tensile layer 40, and a sheath layer 50;

[0028] The conductor 10 is formed by twisting oxygen-free metal copper wires, the number of copper wires in the conductor 10 is between 7 and 300, and the diameter of a single copper wire is between 0.12 and 0.50 mm; the insulating layer 20 is wrapped around the outside of the conductor 10 by an extrusion process, and it uses a hard EPDM material of the corresponding temperature grade, and the concentricity of the insulating layer 20 and the conductor 10 is ≥80%; the isolation layer 30 is filled in the gaps and outer layer of multiple conductors 10 with the insulating layer 20 by an extrusion process, and it uses a TPU material of the corresponding temperature grade, and the concentricity is ≥70%; the tensile layer 40 is wrapped around the outside of the isolation layer 30, and it uses tensile fiber with a weaving density of 90%, which can improve the tensile strength of the entire cable; the sheath layer 50 is wrapped around the outside of the tensile layer 40 by an extrusion process, and it uses a TPU material of the corresponding temperature grade, and the concentricity is ≥70%.

[0029] The utility model has the following advantages:

[0030] The conductor 10 is made of oxygen-free metal copper, generally bare copper, with a purity requirement of more than 99.99%, excellent copper resistivity, and a regular stranded structure;

[0031] The insulating layer 20 is made of hard EPDM rubber material, which is a thermosetting material, avoiding the insulation deformation of thermoplastic materials under high temperature and high current conditions; the extrusion process is adopted to ensure that the sheath is round and easy to peel off, and the insulation concentricity requirement is ≥80%;

[0032] The isolation layer 30 is filled in the gap between the cable cores by extrusion, which can effectively ensure the stability of the core while ensuring the flexibility of the cable, and avoid the phenomenon of core bulging during long-term repeated bending and use; TPU material with corresponding temperature grade is used, and the extrusion process is adopted to ensure that the sheath is round and easy to peel, and the concentricity is ≥70%;

[0033] The tensile layer 40 adopts a drawing-resistant braided structure, which can improve the tensile strength of the entire cable;

[0034] The sheath layer 50 is made of TPU material, which improves the mechanical and physical properties of the cable, enhances the friction performance of the cable, and can effectively avoid the problem of cracking in winter; the TPU material corresponding to the temperature grade is used, and the extrusion process is adopted to ensure that the sheath is round and easy to peel, and the concentricity is ≥70%;

[0035] The combination of the above structures makes the finished cable highly flexible, able to withstand more tension and bending, and the service life of the cable is better than that of traditional cables.

[0036] The above contents are only embodiments of the present invention. The common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. It is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific implementations. Under the premise of not departing from the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A tensile cable for an AC charging station for new energy vehicles, characterized in that: It comprises a plurality of conductors (10) and a protective layer covering the outer periphery of the conductors (10), wherein the protective layer has a structure from the inside to the outside of: an insulating layer (20), a separation layer (30), a tensile layer (40), and a sheath layer (50); The conductor (10) is made of oxygen-free metal copper wires twisted together, the number of copper wires in the conductor (10) is between 7 and 300, and the diameter of a single copper wire is between 0.12 and 0.50 mm; The insulating layer (20) is wrapped around the outside of the conductor (10), and is made of a hard EPDM rubber material of a corresponding temperature grade, with an insulation concentricity of ≥80%; The isolation layer (30) is filled in the gaps and outer layer of a plurality of conductors (10) with an insulating layer (20), and is made of TPU material of a corresponding temperature grade, with a concentricity of ≥70%; The tensile layer (40) is wrapped outside the isolation layer (30), and is made of tensile fibers with a weaving density of 90%; The sheath layer (50) is wrapped around the outside of the tensile layer (40), and is made of TPU material of corresponding temperature grade, with a concentricity of ≥70%.

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