Durable tensile cable for charging electric automobile

Abstract

The utility model discloses a durable tensile cable for charging an electric automobile, which comprises two power supply wire cores, a grounding wire core and two control wire cores which surround a regular pentagonal TPU (thermoplastic polyurethane) elastomer filling core and are twisted together to form a cable core, and the TPU elastomer filling core is provided with a longitudinal hole. Alignment type wholly aromatic copolyamide stretched fiber stranded wires are sleeved in the longitudinal holes, and a chloroprene rubber inner sheath layer, a nylon anti-corrosion layer and a chloroprene rubber outer sheath layer are sequentially coated outside the cable core. The cable has the advantages of better tensile property, dragging and bending resistance, wear resistance, stable electrical characteristics, and better durability and usability.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a durable, stretch-resistant cable for charging electric vehicles. Background Art

[0002] Electric vehicle charging cables are used to connect charging equipment and charging ports, or in vehicle charge and discharge warning control systems that transmit control signals for charging saturation and safety warnings. These cables typically combine grounding, power, and control lines into a single cable. In daily use, these cables are subject to repeated pulling and bending. However, conventional charging cables have limited tensile strength and are prone to breakage after repeated pulling and bending, affecting the stability of their electrical characteristics and resulting in poor durability. Summary of the Invention

[0003] The utility model aims to solve the technical problem of providing a durable, stretch-resistant electric vehicle charging cable with better tensile strength, resistance to dragging, bending and wear, stable electrical characteristics and better durability.

[0004] The utility model solves the above technical problems through the following technical solutions.

[0005] A durable, tensile-resistant electric vehicle charging cable comprises two power cores, one ground core and two control cores twisted together around a regular pentagonal TPU elastomer-filled core to form a cable core, the TPU elastomer-filled core being provided with a longitudinal hole, the longitudinal hole being sheathed with a para-type wholly aromatic copolyamide stretched fiber strand, the outside of the cable core being sequentially coated with a chloroprene rubber inner sheath layer, a nylon anti-corrosion layer and a chloroprene rubber outer sheath layer, the power core comprising a power conductor, a first para-type wholly aromatic copolyamide stretched fiber plain weave and an XLPE insulation layer, the ground core comprising a ground conductor, a second para-type wholly aromatic copolyamide stretched fiber plain weave and a PVC insulation layer, the control core comprising two insulated cores twisted in pairs to form a control core body, the insulated core comprising a control conductor, a third para-type wholly aromatic copolyamide stretched fiber plain weave and a PP insulation layer, and the outside of the control core body being sequentially coated with a nylon resin winding layer, a ferrite film winding layer and a PE sheath layer.

[0006] Preferably, the power conductor is formed by twisting together a number of tinned copper wires with a diameter of 0.05 mm to 0.08 mm.

[0007] Preferably, the grounding conductor is a circular conductor structure formed by twisting and pressing a number of soft copper wires with a diameter of 0.1 mm to 0.3 mm.

[0008] Preferably, the control conductor is formed by twisting together several tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm.

[0009] Preferably, the first, second and third para-type wholly aromatic copolyamide stretched fiber plain woven webs are all inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber strand plain woven web structures.

[0010] Preferably, the inner layer of the para-type wholly aromatic copolyamide stretched fiber strands plain weave mesh is a flat weave mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer of the para-type wholly aromatic copolyamide stretched fiber strands plain weave mesh is a flat weave mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 2 to 8 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

[0011] Preferably, the weaving density of the first, second and third para-type wholly aromatic copolyamide stretched fiber plain weaves are all 90% to 98%.

[0012] Preferably, the nylon resin wrapping layer is a nylon resin one-way spiral overlapping wrapping structure with an overlapping rate of 20% to 30%.

[0013] Preferably, the ferrite film wrapping layer is a ferrite film multi-layer overlapping wrapping structure with a thickness of 100 μm to 300 μm.

[0014] Preferably, the outer surface of the chloroprene rubber inner sheath layer and the inner surface of the chloroprene rubber outer sheath layer are both provided with a thermoplastic EVA adhesive layer.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. By adding a regular pentagonal TPU elastomer filling core, the tensile strength of the cable is improved, which helps the cable core withstand lateral pressure during bending, improves flexibility and bending resistance, and adds a para-type fully aromatic copolyamide stretched fiber strand with a high tensile strength of more than 9000MPa, so that the cable has excellent tensile resistance and improves drag resistance. The cable maintains a better circular cross-section during the bending process, reducing local stress concentration on each core. Moreover, a para-type fully aromatic copolyamide stretched fiber plain woven mesh is added between the conductor and the insulation layer of the power core, ground core and control core, with a tensile strength of more than 5000MPa, which greatly enhances the tensile resistance of each core, inhibits conductor breakage, helps prevent adhesion between the insulation layer and the inner conductor, effectively protects the insulation layer, and greatly improves the durability of the cable.

[0017] 2. The shielding structure of the control wire core is formed by wrapping the ferrite film around the sheath, which ensures the stability of the shielding performance while taking into account flexibility, effectively eliminates internal electromagnetic interference, and has better durability and application.

[0018] 3. A nylon anti-corrosion layer is placed between the inner and outer neoprene sheaths. The high hardness of the nylon resin bonds the inner and outer sheaths, improving tensile strength and protecting the sheaths, extending their service life. The highly wear-resistant neoprene outer sheath resists high mechanical stresses and abrasion, preventing sheath cracking and improving durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the present utility model.

[0021] In the figure: 1-power line core, 2-grounding line core, 3-control line core, 4-TPU elastomer filling core, 5-para-type wholly aromatic copolyamide stretched fiber stranded wire, 6-chloroprene rubber inner sheath layer, 7-nylon anti-corrosion layer, 8-chloroprene rubber outer sheath layer, 9-power conductor, 10-first para-type wholly aromatic copolyamide stretched fiber plain mesh, 11-XLPE insulation layer, 12-grounding conductor, 13-second para-type wholly aromatic copolyamide stretched fiber plain mesh, 14-PVC insulation layer, 15-insulated core, 16-control conductor, 17-third para-type wholly aromatic copolyamide stretched fiber plain mesh, 18-PP insulation layer, 19-nylon resin winding layer, 20-ferrite film winding layer, 21-PE sheath layer. DETAILED DESCRIPTION

[0022] To more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments and accompanying drawings. Similar components in the accompanying drawings are represented by the same reference numerals. Those skilled in the art should understand that the following detailed description is illustrative rather than restrictive and should not be used to limit the scope of protection of the present invention.

[0023] See also Figure 1The durable, tensile-resistant electric vehicle charging cable of an embodiment of the present invention includes two power cores 1, a ground core 2 and two control cores 3 twisted together around a regular pentagonal TPU elastomer filling core 4 to form a cable core. The TPU elastomer filling core 4 is provided with a longitudinal hole, and a para-type wholly aromatic copolyamide stretched fiber strand 5 is sleeved in the longitudinal hole.

[0024] The power line core 1 includes a power conductor 9, a first para-type wholly aromatic copolyamide stretched fiber plain woven mesh 10, and an XLPE insulation layer 11. Specifically, the power conductor 9 is formed by twisting together several tinned copper wires with a diameter of 0.05mm to 0.08mm. The grounding line core 2 includes a grounding conductor 12, a second para-type wholly aromatic copolyamide stretched fiber plain woven mesh 13, and a PVC insulation layer 14. Specifically, the grounding conductor 12 is formed by twisting together several soft copper wires with a diameter of 0.1mm to 0.3mm and pressing them together to form a circular conductor structure. The control line core 3 includes two insulated wire cores 15 twisted together to form the control line core body. The insulated wire cores 15 include a control conductor 16, a third para-type wholly aromatic copolyamide stretched fiber plain woven mesh 17, and a PP insulation layer 18. Specifically, the control conductor 16 is formed by twisting together several tinned copper monofilaments with a diameter of 0.02mm to 0.04mm. The control cable core is sequentially coated with a nylon resin wrapping layer 19, a ferrite film wrapping layer 20, and a PE sheath layer 21. In one embodiment, the nylon resin wrapping layer 19 is a nylon resin unidirectional spiral overlapped wrapping structure with an overlap ratio of 20% to 30%. In one embodiment, the ferrite film wrapping layer 20 is a ferrite film multi-layer overlapped wrapping structure with a thickness of 100 μm to 300 μm. The first, second, and third para-type wholly aromatic copolyamide stretched fiber plain weaves all have a weave density of 90% to 98%. In one embodiment, the first, second and third para-type wholly aromatic copolyamide stretched fiber plain weave meshes are all inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber strand plain weave mesh structures. Furthermore, the inner layer para-type wholly aromatic copolyamide stretched fiber strand plain weave mesh is a flat weave mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer para-type wholly aromatic copolyamide stretched fiber strand plain weave mesh is a flat weave mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 2 to 8 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

[0025] The cable core is coated with a chloroprene rubber inner sheath layer 6, a nylon anti-corrosion layer 7 and a chloroprene rubber outer sheath layer 8 in sequence. Furthermore, a thermoplastic EVA adhesive layer is provided on the outer surface of the chloroprene rubber inner sheath layer 6 and the inner surface of the chloroprene rubber outer sheath layer.

[0026] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. Durable and tensile-resistant electric vehicle charging cable, characterized by: The cable core comprises two power supply cores (1), a grounding core (2) and two control cores (3) which are twisted together around a regular pentagonal TPU elastomer filling core (4), wherein the TPU elastomer filling core (4) is provided with a longitudinal hole, wherein a para-type fully aromatic copolyamide stretched fiber strand (5) is sleeved in the longitudinal hole, and the cable core is coated with a chloroprene rubber inner sheath layer (6), a nylon anti-corrosion layer (7) and a chloroprene rubber outer sheath layer (8) in sequence on the outside, and the power supply core (1) comprises a power supply conductor (9), a first para-type fully aromatic copolyamide stretched fiber plain woven mesh (10) and an X The invention discloses a control line core (3) comprising a control line core body and a grounding conductor (12), a second para-type fully aromatic copolyamide stretched fiber plain woven net (13) and a PVC insulation layer (14); the control line core (3) comprises two insulating line cores (15) twisted into a control line core body; the insulating line core (15) comprises a control conductor (16), a third para-type fully aromatic copolyamide stretched fiber plain woven net (17) and a PP insulation layer (18); the control line core body is coated with a nylon resin sheath layer (19), a ferrite film sheath layer (20) and a PE sheath layer (21) in sequence.

2. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The power conductor (9) is formed by twisting a plurality of tinned copper wires with a diameter of 0.05 mm to 0.08 mm.

3. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The grounding conductor (12) is a circular conductor structure formed by twisting and pressing a plurality of soft copper wires with a wire diameter of 0.1 mm to 0.3 mm.

4. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The control conductor (16) is formed by twisting a plurality of tinned copper monofilaments with a diameter of 0.02 mm to 0.04 mm.

5. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The first, second and third para-type wholly aromatic copolyamide stretched fiber plain weave nets are all inner and outer double-layer para-type wholly aromatic copolyamide stretched fiber strand plain weave net structures.

6. The durable, stretch-resistant electric vehicle charging cable according to claim 5, characterized in that: The inner layer of the flat woven mesh of the para-type wholly aromatic copolyamide stretched fiber strands is a flat woven mesh structure woven from fine para-type wholly aromatic copolyamide stretched fiber strands, and the outer layer of the flat woven mesh of the para-type wholly aromatic copolyamide stretched fiber strands is a flat woven mesh structure woven from coarse para-type wholly aromatic copolyamide stretched fiber strands, and the diameter of the coarse para-type wholly aromatic copolyamide stretched fiber strands is 2 to 8 times the diameter of the fine para-type wholly aromatic copolyamide stretched fiber strands.

7. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The weaving density of the first, second and third para-type wholly aromatic copolyamide stretched fiber plain weave nets is 90% to 98%.

8. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The nylon resin wrapping layer (19) is a nylon resin unidirectional spiral overlapping wrapping structure with an overlapping rate of 20% to 30%.

9. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The ferrite film wrapping layer (20) is a ferrite film multi-layer overlapping wrapping structure and has a thickness of 100 μm to 300 μm.

10. The durable, stretch-resistant electric vehicle charging cable according to claim 1, characterized in that: The outer surface of the chloroprene rubber inner sheath layer (6) and the inner surface of the chloroprene rubber outer sheath layer are both provided with a thermoplastic EVA adhesive layer.

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