Heat dissipation type cable for new energy automobile

Abstract

The utility model discloses a heat dissipation type cable for a new energy automobile, relates to the field of cables, and aims to solve the problem that the service life and the safety of the cable are affected by over-high temperature rise easily caused by long-time high-load operation of the cable due to the fact that a heat dissipation structure is not arranged in the existing cable for the new energy automobile in the prior art. A first heat conduction layer is arranged on the outer side of the conductor core layer, an insulation heat dissipation composite layer is arranged on the outer side of the first heat conduction layer and comprises an insulation layer and a heat dissipation layer, the heat dissipation layer is arranged on the outer side of the insulation layer, and an electromagnetic shielding composite layer is arranged on the outer side of the insulation heat dissipation composite layer. The electromagnetic shielding composite layer comprises a first shielding layer and a second shielding layer, the second shielding layer is arranged on the outer side of the first shielding layer, a heat dissipation sheath is arranged on the outer side of the electromagnetic shielding composite layer, and a plurality of heat dissipation grooves are formed in the end face of the outer side of the heat dissipation sheath.

Description

Technical Field

[0001] This utility model relates to the field of cables, specifically a heat-dissipating cable for new energy vehicles. Background Technology

[0002] Cables for new energy vehicles are high-performance wiring harness systems specifically designed for electric vehicles, hybrid vehicles, and other new energy vehicle models. They are mainly used for transmitting electrical energy, signals, and data. Their core characteristics are high voltage resistance (typically 600V-1000V), high current carrying capacity, and the use of high-insulation materials (such as cross-linked polyethylene XLPE) to ensure safety. Common types include high-voltage power cables (connecting batteries, motors, etc.), charging cables (connecting AC / DC charging piles), and low-voltage signal control cables.

[0003] For example, patent announcement number CN 207602262 U discloses a cable for new energy vehicles, belonging to the field of new energy vehicles. It includes a conductor, an inner wrapping layer, an insulation layer, a tensile layer, a shielding layer, an outer wrapping layer, and a sheath. The conductor, inner wrapping layer, insulation layer, tensile layer, shielding layer, outer wrapping layer, and sheath are arranged radially from the inside out. The inner and outer wrapping layers make the conductor and braid more rounded and compact, effectively preventing performance degradation caused by loose or elliptical conductors, which would affect the cable's high-voltage resistance. The tensile layer increases the tensile strength of the wire and prevents cracking when bent at sharp angles. The shielding layer provides strong shielding and effectively resists low-frequency interference.

[0004] New energy vehicle cables are prone to high temperatures when transmitting high currents, but the aforementioned cables do not have heat dissipation structures, which makes it easy for the cables to overheat during long-term high-load operation, affecting the cable life and safety; therefore, the market urgently needs to develop a heat-dissipating cable for new energy vehicles to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a heat-dissipating cable for new energy vehicles, in order to solve the problem mentioned in the background art that the existing new energy vehicle cables do not have a heat dissipation structure, which makes the cables prone to excessive temperature rise during long-term high-load operation, thus affecting the cable life and safety.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat-dissipating cable for new energy vehicles, comprising a conductor core layer, a first heat-conducting layer disposed outside the conductor core layer, an insulating and heat-dissipating composite layer disposed outside the first heat-conducting layer, the insulating and heat-dissipating composite layer comprising an insulation layer and a heat-dissipating layer disposed outside the insulation layer, an electromagnetic shielding composite layer disposed outside the insulating and heat-dissipating composite layer, the electromagnetic shielding composite layer comprising a first shielding layer and a second shielding layer, the second shielding layer disposed outside the first shielding layer, a heat-dissipating sheath disposed outside the electromagnetic shielding composite layer, and a plurality of heat-dissipating grooves disposed on the outer end face of the heat-dissipating sheath.

[0007] Preferably, the conductor core layer is made of stranded silver-plated copper wire, and the gaps between the strands of the silver-plated copper wire in the conductor core layer are filled with carbon nanotube phase change material.

[0008] Preferably, the first thermally conductive layer is made of graphene film material, and the first thermally conductive layer is fixed to the outside of the conductor core layer by wrapping.

[0009] Preferably, the insulating layer is made of cross-linked polyethylene material and is fixed to the outside of the first thermally conductive layer by extrusion. The heat dissipation layer is made of microporous ceramic silicone rubber material and is fixed to the outside of the insulating layer by extrusion.

[0010] Preferably, the first shielding layer is made of silver-plated non-woven fabric, and the first shielding layer is fixed to the outside of the heat dissipation layer by wrapping.

[0011] Preferably, the second shielding layer is made of aluminum-magnesium alloy wire mesh, and the second shielding layer is fixed to the outside of the first shielding layer by spiral winding.

[0012] Preferably, the heat dissipation sleeve is made of silicon carbide flame-retardant TP material.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, a multi-level axial-radial synergistic heat dissipation system is constructed by filling the conductor core layer with carbon nanotube phase change material, using graphene film for the first thermal conductive layer and microporous ceramic silicone rubber for the insulating heat dissipation composite layer, thereby improving the thermal conductivity of the cable, effectively reducing the conductor operating temperature, and significantly extending the service life under high load conditions.

[0015] (2) In this utility model, a double-layer electromagnetic shielding structure of silver-plated non-woven fabric and aluminum-magnesium alloy wire mesh is adopted to effectively suppress high-frequency electromagnetic interference and prevent cable signal transmission from being interfered with by external factors or other vehicle electronic equipment. The layered design takes into account both conductivity and coverage integrity to ensure full-band shielding effect.

[0016] (3) In this utility model, the heat dissipation sleeve innovatively integrates silicon carbide flame-retardant TP material and three-dimensional heat dissipation groove structure, which increases the heat dissipation area of ​​the outer surface and improves the heat dissipation capacity while meeting the flame retardant level. Attached Figure Description

[0017] Figure 1 This is a front view of a heat-dissipating cable for new energy vehicles according to this utility model;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the insulating and heat dissipation composite layer structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the electromagnetic shielding composite layer structure of this utility model.

[0021] In the diagram: 1. Conductor core layer; 2. First heat-conducting layer; 3. Insulation and heat dissipation composite layer; 301. Insulation layer; 302. Heat dissipation layer; 4. Electromagnetic shielding composite layer; 401. First shielding layer; 402. Second shielding layer; 5. Heat dissipation sleeve; 501. Heat dissipation groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of a heat-dissipating cable for new energy vehicles, comprising a conductor core layer 1. The conductor core layer 1 is made of stranded silver-plated copper wire. The silver plating significantly reduces contact resistance, making it suitable for high-frequency, high-current transmission in new energy vehicles. The stranding gaps of the silver-plated copper wire in the conductor core layer 1 are filled with carbon nanotube phase change material. The carbon nanotube phase change material filling the stranding gaps enhances the axial thermal conductivity, enabling rapid heat dissipation from the conductor. Simultaneously, the carbon nanotube network structure inhibits conductor creep and improves the bending fatigue resistance of the conductor core layer 1. A first thermally conductive layer 2 is provided on the outside of the conductor core layer 1. The first thermally conductive layer 2 is made of graphene film material. Graphene film material has high thermal conductivity, efficiently transferring heat from the conductor core layer outwards and preventing heat accumulation. The first thermally conductive layer 2 is fixed by wrapping. An insulating and heat-dissipating composite layer 3 is provided outside the conductor core layer 1 and outside the first thermally conductive layer 2. The insulating and heat-dissipating composite layer 3 includes an insulating layer 301 and a heat-dissipating layer 302. The heat-dissipating layer 302 is provided outside the insulating layer 301. The insulating layer 301 is made of cross-linked polyethylene material, which has excellent electrical insulation performance, high temperature resistance and chemical stability, and can prevent current leakage and short circuit. The insulating layer 301 is fixed to the outside of the first thermally conductive layer 2 by extrusion. The heat-dissipating layer 302 is made of microporous ceramic silicone rubber material. The porous structure increases the heat dissipation area. Combined with the high thermal radiation characteristics of ceramic filler, it accelerates the diffusion of heat to the surrounding environment. Its flexibility and weather resistance can also adapt to complex working conditions and protect the internal structure from external impact or temperature fluctuations. The heat-dissipating layer 302 is fixed to the outside of the insulating layer 301 by extrusion.

[0024] Please see Figure 1 , Figure 2 and Figure 4 An electromagnetic shielding composite layer 4 is provided on the outside of the insulating and heat dissipation composite layer 3. The electromagnetic shielding composite layer 4 includes a first shielding layer 401 and a second shielding layer 402. The second shielding layer 402 is located outside the first shielding layer 401. The first shielding layer 401 is made of silver-plated non-woven fabric and is fixed to the outside of the heat dissipation layer 302 by wrapping. The second shielding layer 402 is made of aluminum-magnesium alloy wire mesh and is fixed to the outside of the first shielding layer 401 by spiral winding. This effectively suppresses high-frequency electromagnetic interference and prevents cable signal transmission from being interfered with by external factors or other vehicle electronic equipment. The layered design takes into account both conductivity and coverage integrity, ensuring full-band shielding effect. A heat dissipation sleeve 5 is provided on the outside of the electromagnetic shielding composite layer 4. The heat dissipation sleeve 5 is made of silicon carbide flame-retardant TP material. Multiple heat dissipation grooves 501 are provided on the outer end face of the heat dissipation sleeve 5. The silicon carbide flame-retardant TP material has high thermal conductivity and excellent wear resistance. Together with the heat dissipation grooves 501, it increases the contact area with air and improves the heat dissipation capacity.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A heat-dissipating cable for new energy vehicles, comprising a conductor core layer (1), characterized in that: A first heat-conducting layer (2) is provided on the outside of the conductor core layer (1). An insulating and heat-dissipating composite layer (3) is provided on the outside of the first heat-conducting layer (2). The insulating and heat-dissipating composite layer (3) includes an insulating layer (301) and a heat-dissipating layer (302). The heat-dissipating layer (302) is provided on the outside of the insulating layer (301). An electromagnetic shielding composite layer (4) is provided on the outside of the insulating and heat-dissipating composite layer (3). The electromagnetic shielding composite layer (4) includes a first shielding layer (401) and a second shielding layer (402). The second shielding layer (402) is provided on the outside of the first shielding layer (401). A heat-dissipating sleeve (5) is provided on the outside of the electromagnetic shielding composite layer (4). A plurality of heat-dissipating grooves (501) are provided on the outer end face of the heat-dissipating sleeve (5).

2. The heat-dissipating cable for new energy vehicles according to claim 1, characterized in that: The conductor core layer (1) is made of stranded silver-plated copper wire, and the gaps between the strands of the silver-plated copper wire in the conductor core layer (1) are filled with carbon nanotube phase change material.

3. The heat-dissipating cable for new energy vehicles according to claim 1, characterized in that: The first thermal conductive layer (2) is made of graphene film material and is fixed to the outside of the conductor core layer (1) by wrapping.

4. The heat-dissipating cable for new energy vehicles according to claim 1, characterized in that: The insulating layer (301) is made of cross-linked polyethylene material and is fixed to the outside of the first thermally conductive layer (2) by extrusion. The heat dissipation layer (302) is made of microporous ceramic silicone rubber material and is fixed to the outside of the insulating layer (301) by extrusion.

5. A heat-dissipating cable for new energy vehicles according to claim 1, characterized in that: The first shielding layer (401) is made of silver-plated non-woven fabric and is fixed to the outside of the heat dissipation layer (302) by wrapping.

6. The heat-dissipating cable for new energy vehicles according to claim 1, characterized in that: The second shielding layer (402) is made of aluminum-magnesium alloy wire mesh, and the second shielding layer (402) is fixed to the outside of the first shielding layer (401) by spiral winding.

7. The heat-dissipating cable for new energy vehicles according to claim 1, characterized in that: The heat dissipation sleeve (5) is made of silicon carbide flame-retardant TP material.

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