A single-core high-voltage cable for new energy vehicles

Abstract

The present invention belongs to the technical field of high-voltage cables, and particularly relates to a single-core high-voltage cable for new energy vehicles. This single-core high-voltage cable for new energy vehicles sequentially includes, from the inside to the outside: a conductor, an insulating layer, a PET wrapping layer, a braided shielding layer, an aluminum-plastic tape wrapping layer, and a sheath; the braided shielding layer includes an upper shielding layer and a lower shielding layer, and an over-demagnetization mechanism is arranged between the upper shielding layer and the lower shielding layer; the over-demagnetization mechanism includes arc-shaped pieces that are opposite to each other in pairs, and a wavy connecting piece is arranged between two arc-shaped pieces that are opposite to each other in pairs. The wavy connecting piece connects the upper shielding layer and the lower shielding layer, and the arc-shaped pieces connect the upper shielding layer and the lower shielding layer. This single-core high-voltage cable for new energy vehicles has the effect of improving the shielding performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-voltage cables, and particularly relates to a single-core high-voltage cable for new energy vehicles. Background Art

[0002] A high-voltage cable is a type of power cable, which refers to a power cable used for transmitting electricity between 1 kV and 1000 kV. It is mostly applied to power transmission and distribution. A new energy vehicle refers to a vehicle that uses unconventional vehicle fuels as the power source (or uses conventional vehicle fuels and adopts a new type of vehicle-mounted power device), integrating advanced technologies in the aspects of power control and drive of the vehicle, and forming a vehicle with an advanced technical principle, new technologies, and new structures. When a new energy vehicle is charging, a high-voltage cable is required to connect the battery and the charger.

[0003] For example, a heat-resistant cable with the publication number CN211555562U includes three insulated single wires with circular cross-sections that are tangent to each other in pairs and a cooling pipe. The cooling pipe is located at the gap formed by the tangency of two adjacent insulated single wires outside the three insulated single wires; the insulated single wire is composed of a conductor extruded with an insulating layer, then wound with a first support cushion layer, and extruded with an ethylene-propylene rubber elastomer first inner lining layer. The three insulated single wires and the cooling pipe are stranded into a wire group; a tape is wrapped around the wire group in sequence, an ethylene-propylene rubber elastomer second inner lining layer is extruded, and a second support cushion layer is wound. The first support cushion layer and the second support cushion layer are polypropylene pipes. An isolation sleeve, a corrugated copper tape, and a high-temperature resistant silicone rubber sheath are arranged outside the second support cushion layer in sequence. The heat-resistant cable of the present utility model cools down from the inside of the wire group and the cooling pipe structure is stable and not easily deformed; the first support cushion layer and the second support cushion layer are filled with a coolant to cool down the heat-resistant cable while isolating it from the external high-temperature environment. The heat-resistant cable of the present utility model can be used in a high-temperature environment, but the shielding effect of this cable is very poor and it cannot shield the magnetic field in the cable well, resulting in problems with some accessories on new energy vehicles being prone to problems due to magnetic field interference.

[0004] Therefore, we propose a single-core high-voltage cable for new energy vehicles to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of the present invention is to provide a single-core high-voltage cable for new energy vehicles to solve the technical problem that the shielding effect of the cable is very poor and it cannot shield the magnetic field in the cable well, resulting in problems with some accessories on new energy vehicles being prone to problems due to magnetic field interference, and achieve the purpose of improving the shielding performance.

[0006] To solve the above technical problem, the present invention provides a single-core high-voltage cable for new energy vehicles, which sequentially includes from the inside to the outside:

[0007] A conductor, an insulating layer, a PET wrapping layer, a braided shielding layer, an aluminum-plastic tape wrapping layer, and a sheath;

[0008] The woven shielding layer includes an upper shielding layer and a lower shielding layer, and an over demagnetization mechanism is arranged between the upper shielding layer and the lower shielding layer;

[0009] The over demagnetization mechanism includes arc-shaped sheets that are opposite to each other in pairs. A wavy connecting sheet is arranged between two arc-shaped sheets that are opposite to each other in pairs. The wavy connecting sheet connects the upper shielding layer and the lower shielding layer, and the arc-shaped sheet connects the upper shielding layer and the lower shielding layer.

[0010] Further, the radian of the arc-shaped sheet is 1 radian.

[0011] Further, the materials of the wavy connecting sheet and the arc-shaped sheet are memory metals.

[0012] Further, the upper shielding layer includes upper horizontal weaving strips and upper vertical weaving strips. The upper horizontal weaving strips and the upper vertical weaving strips are woven alternately. The upper vertical weaving strips are arranged along the length direction of the conductor. The wavy connecting sheet is arranged on the upper vertical weaving strips, and the wavy connecting sheet is respectively connected to adjacent upper vertical weaving strips;

[0013] The lower shielding layer includes lower horizontal weaving strips and lower vertical weaving strips. The lower horizontal weaving strips and the lower vertical weaving strips are woven alternately. The lower vertical weaving strips are arranged along the length direction of the conductor. The wavy connecting sheet is arranged on the lower vertical weaving strips, and the wavy connecting sheet is respectively connected to adjacent lower vertical weaving strips.

[0014] Further, copper protrusions are arranged on the inner sides of both ends of the arc-shaped sheet.

[0015] Further, the copper protrusions at both ends of the arc-shaped sheet are respectively connected to the upper shielding layer and the lower shielding layer.

[0016] Further, the material of the insulating layer is crosslinked polyolefin.

[0017] The beneficial effects of the present invention are:

[0018] 1. Through the double-layer upper shielding layer and lower shielding layer, a double-layer shielding layer is formed, thereby shielding the magnetic field and initially improving the shielding effect.

[0019] 2. Through the arc-shaped sheets of the over demagnetization mechanism, when the magnetic field emitted inside the cable is emitted from the inside to the outside, the magnetic field will pass through the lower part of the arc-shaped sheet, and the magnetic field will be rebounded by the lower part of the arc-shaped sheet, thereby improving the shielding effect of the cable; the magnetic field passing between the two arc-shaped sheets will enter the space formed by the oppositely arranged arc-shaped sheets, and thus, through the rebound and demagnetization between the inner walls of the arc-shaped sheets, the demagnetization effect of the cable is improved.

[0020] 3. Through the wavy connecting piece, the space between the upper shielding layer and the lower shielding layer is divided again to form several small spaces. And through the arc-shaped pieces in the small spaces, the magnetic field is rebounded and refracted to eliminate the magnetic field, and the internally emitted magnetic field is demagnetized again, improving the demagnetization effect. At the same time, the wavy connecting piece can also play a supporting role.

[0021] 4. Since both the arc-shaped piece and the wavy connecting piece are shape memory metals, a certain space is formed inside the cable, which can play a certain buffering role against external impacts.

[0022] 5. Connecting both the wavy connecting piece and the arc-shaped piece to the shielding layer can improve the overall connection stability of the cable.

[0023] To make the above objects, features and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the cross-section of the single-core high-voltage cable for new energy vehicles of the present invention;

[0026] Figure 2 It is of the present invention Figure 1 The enlarged view of part A in

[0027] Figure 3 It is a schematic structural diagram of the upper shielding layer of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the lower shielding layer of the present invention.

[0029] In the figure:

[0030] 1. Conductor; 11. Insulating layer; 12. PET wrapping layer; 13. Aluminum-plastic tape wrapping layer; 14. Sheath;

[0031] 2. Braided shielding layer; 21. Upper shielding layer; 211. Upper horizontal braided strip; 212. Upper vertical braided strip; 22. Lower shielding layer; 221. Lower horizontal braided strip; 222. Lower vertical braided strip;

[0032] 3. Overdemagnetization mechanism; 31. Arc-shaped piece; 32. Wavy connecting piece;

[0033] 4. Copper protrusion. Detailed implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0035] Embodiment:

[0036] As Figures 1 to 4 shown, a single-core high-voltage cable for a new energy vehicle includes, from inside to outside in sequence: a conductor 1, an insulating layer 11, a PET wrapping layer 12, a braided shielding layer 2, an aluminum-plastic tape wrapping layer 13, and a sheath 14; the braided shielding layer 2 includes an upper shielding layer 21 and a lower shielding layer 22. Insulation is carried out through the insulating layer 11, and shielding of the internal magnetic field of the cable is carried out through the braided shielding layer 2. In this embodiment, the material of the insulating layer 11 is cross-linked polyolefin.

[0037] As Figures 1 to 4 shown, in order to better shield the internal magnetic field of the cable, an over-degaussing mechanism 3 is provided between the upper shielding layer 21 and the lower shielding layer 22. Among them, the over-degaussing mechanism 3 includes arc-shaped pieces 31 that are opposite to each other in pairs, and a wave connecting piece 32 is provided between two arc-shaped pieces 31 that are opposite to each other in pairs. The wave connecting piece 32 connects the upper shielding layer 21 and the lower shielding layer 22, and the arc-shaped pieces 31 connect the upper shielding layer 21 and the lower shielding layer 22. In this embodiment, the radian of the arc-shaped piece 31 is 1 radian.

[0038] Through the double-layer upper shielding layer 21 and lower shielding layer 22, a double-layer shielding layer is formed to shield the magnetic field, initially improving the shielding effect. Then, through the arc-shaped pieces 31 between the upper shielding layer 21 and the lower shielding layer 22, after the magnetic field passes through the lower shielding layer 22, it radiates to the area where the arc-shaped pieces 31 are located, and the magnetic field radiated to the lower part of the arc-shaped piece 31 is rebounded by the arc-shaped lower part of the arc-shaped piece 31, reducing the dissipation of the magnetic field. When the magnetic field radiates between the arc-shaped pieces 31, it enters the space formed by the relatively arranged arc-shaped pieces 31, and thus, through the rebound and degaussing between the inner walls of the arc-shaped pieces 31, the degaussing effect of the cable is improved.

[0039] Through the wavy connecting piece 32, not only can the upper shielding layer 21 and the lower shielding layer 22 be connected, improving the connection stability between the upper shielding layer 21 and the lower shielding layer 22, but also a vertical structure can be formed to play a supporting role and improve the overall strength of the cable. Finally, through the wavy connecting piece 32, the space between the upper shielding layer 21 and the lower shielding layer 22 is divided again to form several small spaces, and through the arc-shaped piece 31 in the small space, the magnetic field is rebounded and refracted to eliminate the magnetic field and demagnetize the internally emitted magnetic field again, improving the demagnetization effect.

[0040] In this embodiment, the materials of the wavy connecting piece 32 and the arc-shaped piece 31 are memory metals, so that the wavy connecting piece 32 and the arc-shaped piece 31 have restoring force and elastic force, and the wavy connecting piece 32 and the arc-shaped piece 31 form a space in the cable. When an external force impacts the cable, the space inside the cable is recessed inward, and after the recess, due to the restoring force and elastic force of the wavy connecting piece 32 and the arc-shaped piece 31, the cable returns to its original state, thus reducing the situation where the cable breaks due to being impacted after a new energy vehicle is impacted and improving the safety of the vehicle after impact.

[0041] As Figures 1 to 4 shown, the upper shielding layer 21 includes upper horizontal braided strips 211 and upper vertical braided strips 212, and the upper horizontal braided strips 211 and the upper vertical braided strips 212 are braided alternately. The upper vertical braided strips 212 are arranged along the length direction of the conductor 1. The wavy connecting piece 32 is arranged on the upper vertical braided strips 212, and the wavy connecting piece 32 is respectively connected to adjacent upper vertical braided strips 212; the lower shielding layer 22 includes lower horizontal braided strips 221 and lower vertical braided strips 222, and the lower horizontal braided strips 221 and the lower vertical braided strips 222 are braided alternately. The lower vertical braided strips 222 are arranged along the length direction of the conductor 1. The wavy connecting piece 32 is arranged on the lower vertical braided strips 222, and the wavy connecting piece 32 is respectively connected to adjacent lower vertical braided strips 222. Through the upper vertical braided strips 212 and the lower vertical braided strips 222 arranged along the length direction of the conductor 1, the strength of the cable is improved, and the stability of the cable can be improved. By connecting the upper and lower ends of the wavy connecting piece 32 to the upper vertical braided strips 212 and the lower vertical braided strips 222 respectively, the connection stability of the wavy connecting piece 32 can be improved.

[0042] As Figures 1 to 4As shown in the figure, copper protrusions 4 are provided on the inner sides of both ends of the arc-shaped piece 31. The copper protrusions 4 at both ends of the arc-shaped piece 31 are respectively connected to the upper shielding layer 21 and the lower shielding layer 22, and both ends of the arc-shaped piece 31 are all connected to the upper vertical braided strip 212 and the lower vertical braided strip 222 respectively, which can improve the connection stability of the arc-shaped piece 31. At the same time, through the copper protrusions 4 on the inner sides of both ends of the arc-shaped piece 31, when the magnetic field inside the arc-shaped piece 31 is refracted and is about to refract out of the inner space of the arc-shaped piece 31, the magnetic field collides with the copper protrusions 4, so that the magnetic field that was originally going to refract out of the inner space of the arc-shaped piece 31 is reflected back between the arc-shaped pieces 31 again, thereby further improving the magnetic field demagnetization effect.

[0043] In summary: Through the double-layer upper shielding layer 21 and lower shielding layer 22, a double-layer shielding layer is formed to shield the magnetic field and initially improve the shielding effect. Through the arc-shaped piece 31 of the over-demagnetization mechanism 3, when the magnetic field radiated inside the cable radiates from the inside out, the magnetic field will pass through the lower part of the arc-shaped piece 31, and the magnetic field will be rebounded by the lower part of the arc-shaped piece 31, thereby improving the shielding effect of the cable; the magnetic field passing between the two arc-shaped pieces 31 will enter the space formed by the oppositely arranged arc-shaped pieces 31, and thus the magnetic field is rebounded and demagnetized between the inner walls of the arc-shaped piece 31, improving the demagnetization effect of the cable. Through the wave connecting piece 32, the space between the upper shielding layer 21 and the lower shielding layer 22 is divided again to form several small spaces, and through the arc-shaped pieces 31 in the small spaces, the magnetic field is rebounded and refracted to eliminate the magnetic field, and the internally radiated magnetic field is demagnetized again to improve the demagnetization effect. At the same time, the wave connecting piece 32 can also play a supporting role. Since both the arc-shaped piece 31 and the wave connecting piece 32 are memory metals, a certain space is formed inside the cable, which can play a certain buffering role for external impacts. Connecting both the wave connecting piece 32 and the arc-shaped piece 31 to the shielding layer can improve the overall connection stability of the cable.

[0044] All the devices selected in this application are common standard parts or components known to those skilled in the art, and their structures and principles can all be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0045] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A single-core high-voltage cable for new energy vehicles, characterized in that: From the inside out, it successively includes: a conductor (1), an insulating layer (11), a PET wrapping layer (12), a braided shielding layer (2), an aluminum-plastic tape wrapping layer (13), and a sheath (14); the braided shielding layer (2) includes an upper shielding layer (21) and a lower shielding layer (22), and an over demagnetization mechanism (3) is arranged between the upper shielding layer (21) and the lower shielding layer (22); the over demagnetization mechanism (3) includes arc-shaped pieces (31) facing away from each other in pairs, and a wavy connecting piece (32) is arranged between two arc-shaped pieces (31) facing away from each other in pairs. The wavy connecting piece (32) connects the upper shielding layer (21) and the lower shielding layer (22), and the arc-shaped piece (31) connects the upper shielding layer (21) and the lower shielding layer (22); the radian of the arc-shaped piece (31) is 1 radian; the materials of the wavy connecting piece (32) and the arc-shaped piece (31) are shape memory metals.

2. The single-core high-voltage cable for new energy vehicles according to claim 1, wherein: the upper shielding layer (21) includes upper horizontal braided strips (211) and upper vertical braided strips (212). The upper horizontal braided strips (211) and the upper vertical braided strips (212) are woven in an alternating manner. The upper vertical braided strips (212) are arranged along the length direction of the conductor (1). The wavy connecting piece (32) is arranged on the upper vertical braided strips (212), and the wavy connecting piece (32) is respectively connected to adjacent upper vertical braided strips (212); the lower shielding layer (22) includes lower horizontal braided strips (221) and lower vertical braided strips (222). The lower horizontal braided strips (221) and the lower vertical braided strips (222) are woven in an alternating manner. The lower vertical braided strips (222) are arranged along the length direction of the conductor (1). The wavy connecting piece (32) is arranged on the lower vertical braided strips (222), and the wavy connecting piece (32) is respectively connected to adjacent lower vertical braided strips (222).

3. The single-core high-voltage cable for new energy vehicles according to claim 2, wherein: copper protrusions (4) are arranged on the inner sides of both ends of the arc-shaped piece (31).

4. The single-core high-voltage cable for new energy vehicles according to claim 3, wherein: the copper protrusions (4) at both ends of the arc-shaped piece (31) are respectively connected to the upper shielding layer (21) and the lower shielding layer (22).

5. The single-core high-voltage cable for new energy vehicles according to claim 4, wherein: the material of the insulating layer (11) is cross-linked polyolefin.

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