Lightning protection charging cable applied to portable charging gun

Abstract

The utility model relates to a lightning protection charging cable applied to a portable charging gun, which comprises a cable core and an outer protective layer extruded outside the cable core, the cable core comprises a positive core wire, a negative core wire, a communication core wire and a tensile fiber bundle, the positive core wire, the negative core wire and the communication core wire are twisted together by taking the tensile fiber bundle as a center, and the outer protective layer is extruded outside the cable core. A tinned copper wire braided shielding layer, an aluminum-plastic composite belt and a grounding layer are sequentially arranged between the cable core and the outer protective layer from inside to outside, and the grounding layer is formed by winding a plurality of bare copper wires which are uniformly distributed outside the aluminum-plastic composite belt. According to the utility model, the technical problems of equipment failure and cable line burning caused by lightning stroke and electromagnetic interference of the conventional cable for the portable charging gun can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of charging cable, concretely relates to a lightning -resistant charging cable applied to portable charging gun. BACKGROUND

[0002] The portable charging gun is a kind of electric vehicle charging device directly connected with mains socket, is widely used by private user because of its convenient operation and carrying, but the cable of this portable charging gun will generate induced current because of the shielding material such as aluminium-plastic composite tape, and the accumulation of electric charge will be formed on the surface of metal shielding layer, in thunder weather, cable line in charging is easily struck by lightning and electromagnetic interference, leading to equipment failure and cable line burnout, so there is great security risk in the use process. SUMMARY

[0003] The utility model solves the technical problem that the cable of conventional portable charging gun is easily struck by lightning and electromagnetic interference, leading to equipment failure and cable line burnout.

[0004] To solve the above technical problem, the utility model adopts the technical scheme of: the lightning -resistant charging cable applied to portable charging gun, including cable core and the outer sheath extruded in the cable core outside, the cable core includes positive core wire, negative core wire, communication core wire and tensile fiber bundle, and positive core wire, negative core wire, communication core wire are stranded together with tensile fiber bundle as the center, the cable core and outer sheath are sequentially provided with tinned copper wire braided shielding layer, aluminium-plastic composite tape and ground layer from inside to outside, the ground layer is formed by the bare copper wire that is uniformly distributed in the aluminium-plastic composite tape outside and is wound.

[0005] As a preferred scheme, the bare copper wire is helically wound on the outer surface of aluminium-plastic composite tape, and the ground layer further includes conductive rubber strip filled between any two adjacent bare copper wires, and the conductive rubber strip connects the bare copper wires to each other.

[0006] As a preferred scheme, the cable core further includes a ground wire, and the ground wire is stranded together with the positive core wire, the negative core wire and the communication core wire.

[0007] As a preferred scheme, the positive core wire, the negative core wire, the communication core wire and the ground wire are respectively extruded with an insulating layer, and the inner wall of the insulating layer of the positive core wire and the negative core wire is further provided with a heat insulation layer, and the inner wall of the insulating layer of the communication core wire is provided with a shielding layer.

[0008] As a preferred solution, a connecting terminal is further included, which is arranged at the end of the cable connected with the plug, the connecting terminal comprises a clamping ring and a clamping seat connected with each other, the clamping ring is sleeved outside the plurality of bare copper wires at the end of the cable and is in conductive connection with the plurality of bare copper wires, the clamping seat extends outward from the end surface of the clamping ring along the axial direction of the cable, and the ground wire extends out of the outer sheath and is clamped in the clamping seat and in conductive connection with the clamping seat.

[0009] The utility model discloses beneficial effect is: the utility model discloses through setting up the grounding layer that is by the winding of plurality of bare copper wires at the aluminium -plastic composite strip outside, utilizes the grounding layer as the drainage, can connect the lightning current to the ground, prevents the equipment from suffering from the lightning and burns, thereby improves the use security of charging cable, overcomes the technical problem that the portable charging gun cable is easily subjected to lightning and electromagnetic interference and leads to equipment failure and cable line burning. BRIEF DESCRIPTION OF DRAWINGS

[0010] The specific embodiments of the utility model will be further described in detail below in combination with the drawings, wherein:

[0011] Figure 1 It is a specific end surface structure schematic diagram of the charging cable of the utility model;

[0012] Figure 2 It is the structure schematic diagram of the end of the charging cable and the plug connection of the utility model;

[0013] Figure 1 And Figure 2 In the middle: 1, outer sheath, 2, positive core wire, 3, negative core wire, 4, communication core wire, 5, tensile fiber bundle, 6, tinned copper wire braided shielding layer, 7, aluminium -plastic composite strip, 8, bare copper wire, 9, conductive rubber strip, 10, ground wire, 11, insulating layer, 12, heat insulation layer, 13, shielding layer, 14, connecting terminal, 1401, clamping ring, 1402, clamping seat. DETAILED DESCRIPTION

[0014] The specific implementation scheme of the utility model will be described in detail below in combination with the drawings.

[0015] As Figure 1 And Figure 2The lightning protection charging cable applied to the portable charging gun shown in the application comprises a cable core and an outer sheath 1 extruded outside the cable core, the cable core comprises a positive core wire 2, a negative core wire 3, a communication core wire 4 and a tensile fiber bundle 5, the positive core wire 2, the negative core wire 3 and the communication core wire 4 are twisted together with the tensile fiber bundle 5 as the center to improve the tensile strength and flexibility of the cable, a tinned copper wire braided shielding layer 6, an aluminum plastic composite tape 7 and a grounding layer are sequentially arranged from inside to outside between the cable core and the outer sheath 1, the aluminum plastic composite tape 7 can improve the corrosion resistance of the cable and isolate the influence of external heat source on the cable core. The grounding layer is formed by winding seven φ0.43mm bare copper wires 8 uniformly distributed outside the aluminum plastic composite tape 7, which can meet the safety load current of 16A.

[0016] In practical application, the user can increase or decrease the number and diameter of the bare copper wires 8 of the grounding layer according to the size of the charging current.

[0017] The plurality of bare copper wires 8 in the embodiment are helically wound on the outer surface of the aluminum plastic composite tape 7, and the grounding layer in the embodiment further preferably comprises a conductive rubber strip 9 filled between any two adjacent bare copper wires 8, which connects the bare copper wires 8 to each other. The conductive performance of the conductive rubber strip 9 is lower than that of the bare copper wire 8, but it can connect the plurality of bare copper wires 8 to each other into a conductive whole, effectively avoiding the problem of burning caused by the single bare copper wire 8 leading the lightning current.

[0018] The cable core in the embodiment further comprises a ground wire 10 twisted together with the positive core wire 2, the negative core wire 3 and the communication core wire 4. The ground wire 10 is used to connect the ground terminal of the vehicle charging connector and the ground terminal on the socket to improve the safety of the vehicle charging connector during charging.

[0019] The positive core wire 2, the negative core wire 3, the communication core wire 4 and the ground wire 10 in the embodiment are respectively extruded with an insulating layer 11 to achieve mutual insulation. The inner wall of the insulating layer 11 of the positive core wire 2 and the negative core wire 3 is further provided with a heat insulation layer 12 to reduce the interference of the heat generated by the positive core wire 2 and the negative core wire 3 during charging on the communication function of the communication core wire 4. The inner wall of the insulating layer 11 of the communication core wire 4 is provided with a shielding layer 13 to eliminate the influence of the magnetic field generated by the large current in the positive core wire 2 and the negative core wire 3 on the signal transmission of the communication core wire 4.

[0020] As Figure 2As shown, the embodiment further comprises a connecting terminal 14 arranged at the end of the cable connected with the plug, the connecting terminal 14 comprises a clamping ring 1401 and a clamping seat 1402 connected with each other, the clamping ring 1401 is sleeved outside the plurality of bare copper wires 8 at the end of the cable and is in conductive connection with the plurality of bare copper wires 8, the clamping seat 1402 extends outward from the end surface of the clamping ring 1401 along the axial direction of the cable, and the ground wire 10 extends out of the outer sheath 1 and is clamped in the clamping seat 1402 and is in conductive connection with the clamping seat 1402. The plurality of bare copper wires 8 and the ground wire 10 are connected by the connecting terminal 14, so that the cable is connected with the plug, and the convenience of connection and the neatness of the cable end are improved.

[0021] The working process of the utility model is: one end of the utility model is connected with the plug, the other end is connected with the charging gun, in use, the charging gun is inserted with the automobile charging structure, the plug is inserted with the household three-leg socket, the ground wire is connected with the ground wire of the socket to realize grounding, when suffering from lightning stroke, the lightning stroke current flows into the ground along the bare copper wire 8 and the ground wire of the socket, so that the lightning stroke current causes the charging equipment failure and the cable fire burning accident are avoided. The use safety of the portable charging gun is improved.

[0022] The above embodiment only illustrates the principle and effect of the present application, and part of the applied embodiments, and is not used to limit the present application; it should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A lightning-proof charging cable for portable charging guns, comprising a cable core and an outer sheath (1) extruded around the cable core, wherein the cable core comprises a positive core wire (2), a negative core wire (3), a communication core wire (4), and a tensile fiber bundle (5), wherein the positive core wire (2), the negative core wire (3), and the communication core wire (4) are twisted together around the tensile fiber bundle (5), characterized in that, Between the cable core and the outer sheath (1), a tinned copper wire braided shielding layer (6), an aluminum-plastic composite strip (7), and a grounding layer are arranged sequentially from the inside to the outside. The grounding layer is formed by winding multiple bare copper wires (8) evenly distributed outside the aluminum-plastic composite strip (7).

2. The lightning protection charging cable for portable charging guns according to claim 1, characterized in that, Multiple bare copper wires (8) are spirally wound in the same direction on the outer surface of the aluminum-plastic composite strip (7). The grounding layer also includes a conductive rubber strip (9) filled between any two adjacent bare copper wires (8), and the conductive rubber strip (9) connects each bare copper wire (8) to the other.

3. The lightning protection charging cable for portable charging guns according to claim 1, characterized in that, The cable core also includes a ground wire (10), which is twisted together with the positive core wire (2), the negative core wire (3), and the communication core wire (4).

4. The surge-proof charging cable for portable charging guns according to claim 3, characterized in that, The positive electrode core wire (2), negative electrode core wire (3), communication core wire (4) and ground wire (10) are each extruded with an insulating layer (11). The inner wall of the insulating layer (11) of the positive electrode core wire (2) and the negative electrode core wire (3) is also provided with a heat insulation layer (12), and the inner wall of the insulating layer (11) of the communication core wire (4) is provided with a shielding layer (13).

5. The lightning protection charging cable for portable charging guns according to claim 3, characterized in that, It also includes a connection terminal (14) which is disposed at one end of the cable and the plug. The connection terminal (14) includes a retaining ring (1401) and a retaining seat (1402) connected to each other. The retaining ring (1401) is sleeved on the outside of multiple bare copper wires (8) at the end of the cable and is electrically connected to the multiple bare copper wires (8). The retaining seat (1402) extends outward from the end face of the retaining ring (1401) along the axial direction of the cable. The ground wire (10) extends out of the outer sheath (1) and is snapped into the retaining seat (1402) and is electrically connected to the retaining seat (1402).

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