Cable for direct current gun of new energy charging pile

Abstract

The utility model provides a cable for a new energy charging pile direct current gun, which comprises a wire core, a wrapping layer wrapping the wire core, and a sheath wrapping the wrapping layer, and is characterized in that the wire core comprises a plurality of mutually twisted conductors, shielding layers wrapping the peripheries of the conductors, and insulating layers wrapping the peripheries of the shielding layers; the material of the shielding layer is replaced from traditional bare copper weaving into aryl fiber weaving, and other layered structures are designed, so that the tensile strength and the anti-aging performance of each layered structure are improved, when a user stretches and bends the cable at high frequency, the insulating layer is not easy to damage, the cable core is not easy to expose, the use safety coefficient of the cable is improved, and the service life of the cable is prolonged. The method has the advantages of improving user experience, reducing maintenance cost and being convenient to popularize and implement.

Description

Technical Field

[0001] This application belongs to the technical field of new energy vehicle cable manufacturing, and specifically relates to a cable for a DC gun of a new energy charging pile. Background Art

[0002] In the prior art, with the rapid development of lithium battery technology, the market share of new energy vehicles has increased significantly. Now new energy vehicles have been widely used. To meet the charging needs of new energy vehicles, the demand for charging piles by new energy vehicle users has increased significantly.

[0003] In the prior art, during the charging process using a charging pile, users need to stretch and bend the charging pile cable. The outer insulation layer of the existing new energy charging pile cable is usually a thermoplastic elastomer, and the shielding layer is usually a bare copper braid. In actual implementation, the service life of the cable is low. During the stretching and bending process, the shielding layer and the outer insulation layer are prone to mechanical aging. During the charging process of the charging pile, the increase in cable temperature will also accelerate the aging of the shielding layer and the insulation layer, making the shielding layer and the insulation layer prone to damage, with a high risk coefficient during use and an increased frequency of cable replacement. Therefore, improvements are urgently needed now. Summary of the Utility Model

[0004] This application aims to solve the technical problems in the prior art that during the actual use of the cable for a new energy vehicle charging pile, users will stretch and bend the cable. As the number of uses increases, the internal layered structure of the cable is prone to mechanical aging and physical aging, the insulation layer is prone to damage, the wire core is prone to exposure, the service life of the cable is low, and the maintenance cost is high. A cable for a DC gun of a new energy charging pile is proposed.

[0005] This application adopts the following scheme. A cable for a DC gun of a new energy charging pile includes a wire core, a wrapping layer coated on the outer periphery of the wire core, and a sheath coated on the wrapping layer. The wire core includes multiple conductors, a shielding layer coated on the outer periphery of each conductor, and an insulation layer coated on the outer periphery of the shielding layer. The shielding layer is woven from multi-aryl fibers.

[0006] Furthermore, the weaving density p of the multi-aryl fibers in the shielding layer satisfies the following relationship: 95% ≤ p ≤ 98%.

[0007] Furthermore, the conductor is a Class 6 conductor, the conductor is stranded by multiple copper wires, the stranding direction during the stranding of the multiple copper wires is left-handed, and the elongation rate h of the conductor satisfies the following relationship: 35% ≤ h ≤ 48%.

[0008] Furthermore, the material of the insulation layer is 105 silicone rubber, and the hardness y of the insulation layer satisfies the following relationship: 65 Shore A ≤ y ≤ 70 Shore A.

[0009] Furthermore, a filling layer is filled between the wire core and the wrapping layer, and the material of the filling layer is high-strength nylon.

[0010] Furthermore, the wrapping layer includes a first wrapping layer covering the outer periphery of the wire core and a second wrapping layer covering the outer periphery of the first wrapping layer, and the thickness of the first wrapping layer is greater than that of the second wrapping layer.

[0011] Furthermore, the material of the first wrapping layer is non-woven fabric, and the material of the second wrapping layer is steel strip.

[0012] Furthermore, the material of the sheath is 105 thermoplastic polyurethane, and the elongation rate s of the sheath satisfies the following relationship: 500% < s ≤ 650%.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] The present application provides a cable for a DC gun of a new energy charging pile, including a wire core, a wrapping layer covering the wire core, and a sheath covering the wrapping layer. The wire core includes a plurality of mutually twisted conductors, a shielding layer covering the outer periphery of each conductor, and an insulating layer covering the outer periphery of the shielding layer. By replacing the material of the shielding layer from traditional bare copper braiding with aryl fiber braiding and designing other layered structures, the tensile strength and anti-aging performance of each layered structure are improved. When the user performs high-frequency stretching and bending on the cable, the insulating layer is not easily damaged and the wire core is not easily exposed, improving the safety factor of cable use, having the advantages of improving the user experience, reducing the maintenance cost, and facilitating popularization and implementation. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0016] Figure 1 It is a cross-sectional structural schematic diagram of a cable for a DC gun of a new energy charging pile according to the present application. Detailed Embodiments

[0017] Combined as Figure 1 As shown, the technical solution is further described. A cable for a DC gun of a new energy charging pile includes a wire core 1, a wrapping layer 2 covering the outer periphery of the wire core 1, and a sheath 3 covering the wrapping layer 2. The wire core 1 includes a plurality of conductors 10, a shielding layer 11 covering the outer periphery of each conductor 10, and an insulating layer 12 covering the outer periphery of the shielding layer 11. The shielding layer 11 is woven from multi-aryl fibers.

[0018] This application provides a cable for a DC gun of a new energy charging pile, which includes a core, a wrapping layer coated on the core, and a sheath coated on the wrapping layer. The core includes multiple mutually stranded conductors, a shielding layer coated on the outer periphery of each conductor, and an insulating layer coated on the outer periphery of the shielding layer. By replacing the material of the shielding layer from traditional bare copper braiding with aramid fiber braiding and designing other layered structures, the tensile strength and anti-aging performance of each layered structure are improved. When the user performs high-frequency stretching and bending on the cable, the insulating layer is not easily damaged and the core is not easily exposed, improving the safety factor of cable use, having the advantages of enhancing the user experience, reducing maintenance costs, and facilitating popularization and implementation.

[0019] During the implementation of this embodiment, the braiding density p of the aramid fiber in the shielding layer 11 satisfies the following relationship: 95% ≤ p ≤ 98%.

[0020] During the actual implementation process, the braiding density p of the aramid fiber in the shielding layer 11 is 95.5%, and the thickness of the shielding layer is 0.8 cm. By replacing the traditional bare copper braided shielding layer with aramid fiber braiding, the tensile strength and anti-aging performance of the shielding layer are improved, greatly improving the overall tensile strength and swing resistance of the conductor. When the user performs high-frequency stretching and bending on the cable, the insulating layer is not easily damaged and the core is not easily exposed, improving the safety factor of cable use, having the advantages of enhancing the user experience, reducing maintenance costs, and facilitating popularization and implementation.

[0021] During the actual implementation process, the aramid fiber has very high tensile strength and wear resistance. After the cable is energized and heated, the aramid fiber can still maintain good shielding performance. Moreover, the aramid fiber has a lower density compared with bare copper, which is beneficial to the lightweight design of the cable.

[0022] During the implementation of this embodiment, the conductor 10 is a category 6 conductor, the conductor 10 is composed of multiple strands of copper wires stranded together, the stranding direction during the stranding of the multiple strands of copper wires is left-handed, and the elongation rate h of the conductor 10 satisfies the following relationship: 35% ≤ h ≤ 48%.

[0023] During the actual implementation process, the elongation rate h of the conductor is 38%, and the conductor can be obtained after the multiple strands of copper wires are stranded in layers.

[0024] During the implementation of this embodiment, the material of the insulating layer 12 is 105 silicone rubber, and the hardness y of the insulating layer 12 satisfies the following relationship: 65 Shore A ≤ y ≤ 70 Shore A.

[0025] In the actual implementation process, the hardness of the insulating layer is 66 Shore A. The insulating layer is prepared by extrusion, which makes the insulating layer have high density. The degree of plasticization of the insulating layer is much higher than that of pipe extrusion. 105 silicone rubber is a semi-organic and semi-inorganic polymer, with both high-strength composite elasticity, a relatively high temperature resistance grade, high heat resistance and excellent cold resistance, meeting the charging requirements of the charging pile cable under high current.

[0026] In the implementation process of this embodiment, a filling layer 4 is filled between the wire core 1 and the wrapping layer 2, and the material of the filling layer 4 is high-strength nylon.

[0027] In the actual implementation process, the tensile strength of the filling layer 4 is 5000N. The wire core is prepared by stranding multiple wires. The stranding direction is left-handed during the stranding process of the multiple wires, and the cabling diameter ratio of the wire core is 12 times, making the stranding of the wire core tighter and more round.

[0028] In the implementation process of this embodiment, the wrapping layer 2 includes a first wrapping layer 20 wrapped around the outer periphery of the wire core 1 and a second wrapping layer 21 wrapped around the outer periphery of the first wrapping layer 20. The thickness of the first wrapping layer 20 is greater than the thickness of the second wrapping layer 21.

[0029] In the implementation process of this embodiment, the material of the first wrapping layer 20 is non-woven fabric, and the material of the second wrapping layer 21 is steel strip.

[0030] In the actual implementation process, the thickness of the steel strip is 0.2mm, and the gap rate of the steel strip is 45%-50%, which can ensure high-strength rolling of the wire core and tensile swing test, improving its protection for the wire core.

[0031] In the implementation process of this embodiment, the material of the sheath 3 is 105 thermoplastic polyurethane, and the elongation rate s of the sheath 3 satisfies the following relationship: 500% < s ≤ 650%.

[0032] In the actual implementation process, the elongation rate s of the sheath 3 is 550%. It has properties such as hydrolysis resistance, UV resistance, high and low temperature resistance, and wear resistance, which can effectively extend the service life of the cable.

[0033] The present application provides a cable for a DC gun of a new energy charging pile, which includes a core, a wrapping layer wrapped around the core, and a sheath wrapped around the wrapping layer. The core includes a plurality of mutually stranded conductors, a shielding layer wrapped around the outer periphery of each conductor, and an insulating layer wrapped around the outer periphery of the shielding layer. By replacing the material of the shielding layer from traditional bare copper braiding with aramid fiber braiding and designing other layered structures, the tensile strength and anti-aging performance of each layered structure are improved. When the user performs high-frequency stretching and bending on the cable, the insulating layer is not easily damaged and the core is not easily exposed, improving the safety factor of cable use, having the advantages of improving the user experience, reducing the maintenance cost, and facilitating popularization and implementation.

[0034] The above are only the embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable for a DC gun of a new energy charging pile, characterized in that, It includes a core (1), a wrapping layer (2) wrapped around the outer periphery of the core (1), and a sheath (3) wrapped around the wrapping layer (2). The core (1) includes a plurality of conductors (10), a shielding layer (11) wrapped around the outer periphery of each conductor (10), and an insulating layer (12) wrapped around the outer periphery of the shielding layer (11). The shielding layer (11) is woven from multi-aryl fibers.

2. The cable for the DC gun of a new energy charging pile according to claim 1, characterized in that, The weaving density p of the multi-aryl fibers in the shielding layer (11) satisfies the following relationship: 95% ≤ p ≤ 98%.

3. The cable for the DC gun of a new energy charging pile according to claim 1, wherein, The conductor (10) is a Category 6 conductor. The conductor (10) is stranded by a plurality of copper wires, and the stranding direction during the stranding of the plurality of copper wires is left-handed. The elongation rate h of the conductor (10) satisfies the following relationship: 35% ≤ h ≤ 48%.

4. A cable for a DC gun of a new energy charging pile according to claim 1, characterized in that, The material of the insulating layer (12) is 105 silicone rubber, and the hardness y of the insulating layer (12) satisfies the following relationship: 65 Shore A ≤ y ≤ 70 Shore A.

5. A cable for a DC gun of a new energy charging pile according to claim 1, characterized in that, A filling layer (4) is filled between the core (1) and the wrapping layer (2), and the material of the filling layer (4) is high-strength nylon.

6. A cable for a DC gun of a new energy charging pile according to claim 1, characterized in that The wrapping layer (2) includes a first wrapping layer (20) wrapped around the outer periphery of the core (1) and a second wrapping layer (21) wrapped around the outer periphery of the first wrapping layer (20). The thickness of the first wrapping layer (20) is greater than the thickness of the second wrapping layer (21).

7. The cable for a DC gun of a new energy charging pile according to claim 6, characterized in that, The material of the first wrapping layer (20) is non-woven fabric, and the material of the second wrapping layer (21) is steel strip.

8. The cable for the DC gun of a new energy charging pile according to claim 1, characterized in that, The material of the sheath (3) is 105 thermoplastic polyurethane, and the elongation rate s of the sheath (3) satisfies the following relationship: 500% < s ≤ 650%.

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