Cable for new energy automobile

Abstract

The cable comprises a conductor, an inner sheath, a heat dissipation structure and an outer sheath which are sequentially wrapped from inside to outside, the heat dissipation structure comprises a graphene heat dissipation layer and a heat-conducting silica gel layer, the graphene heat dissipation layer is attached to the inner sheath and the outer sheath, a filling gap is formed, the heat-conducting silica gel layer is arranged in the filling gap, and the heat-conducting silica gel layer is arranged in the heat-conducting silica gel layer. And the inner sheath and the outer sheath are attached to each other. According to the scheme, joint heat transfer of the graphene heat dissipation belt and the heat conduction silica gel is achieved, the use amount of graphene is reduced, the heat conduction silica gel with relatively low price is used for filling, heat generated in the cable can be rapidly conducted out, the temperature of the cable during high-load work is effectively reduced, the service life of the cable is prolonged, and the working reliability of the cable is improved; therefore, the cable cost is reduced while the cable is ensured to have enough heat-conducting property.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile high -voltage cable technical field, concretely relates to a cable for new energy automobile. BACKGROUND

[0002] With the rapid development of new energy automobile industry, the performance requirement of high-voltage cable is increasingly strict.

[0003] The utility model discloses a kind of high-efficiency heat dissipation type new energy automobile charging cable, and the middle axis position in its lining sleeve is provided with graphene sleeve pipe, the outer wall of graphene sleeve pipe is provided with profiled heat conduction block respectively on both sides, each profiled heat conduction block is provided with a plurality of heat conduction columns on the side away from graphene sleeve pipe, and heat conduction column is linearly arranged with equal interval, and metal shielding layer is formed by wire braiding and is arranged outside lining sleeve, protective outer sleeve is extruded and covered on metal shielding layer, by the utility model, the conductor inside charging cable is quickly cooled, avoid in summer this kind of high-temperature environment, heat in charging cable does not go out and cause high-temperature damage, reduce the probability that security risk occurs.

[0004] In the patent, the graphene sleeve pipe is sleeved on the outer periphery of the conductor and cooperates with the heat conduction block to achieve rapid heat dissipation, however, the whole graphene sleeve pipe is made of graphene material, and the cost of graphene is relatively high, which increases the cost of the cable. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the above technical deficiencies, and provides a cable for new energy automobile, to solve the technical problem that the whole graphene sleeve pipe is made of graphene material in the prior art, and the cost of graphene is relatively high, which increases the cost of the cable.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of cable for new energy automobile, comprising: conductor, inner sheath, heat dissipation structure and outer sheath covered in turn from inside to outside, wherein, the heat dissipation structure includes graphene heat dissipation layer and heat-conducting silica gel layer, the graphene heat dissipation layer is attached to the inner sheath and the outer sheath, and is formed with filling gap, the heat-conducting silica gel layer is set in the filling gap, and is attached to the inner sheath and the outer sheath.

[0008] In some embodiments, the graphene heat dissipation layer includes a plurality of graphene heat dissipation bands, and the plurality of graphene heat dissipation bands are spirally wound around the outer periphery of the inner sheath, and the two adjacent graphene heat dissipation bands are spaced apart and form the filling gap.

[0009] In some embodiments, the inner sheath comprises an inner insulation layer and a shielding layer, the inner insulation layer and the shielding layer successively cover the conductor;

[0010] The graphene heat dissipation layer is attached to the outer periphery of the shielding layer.

[0011] In some embodiments, the shielding layer is provided with multiple layers, the multiple layers of the shielding layer successively cover the inner insulation layer, and the graphene heat dissipation layer is attached to the shielding layer away from the inner insulation layer.

[0012] In some embodiments, the shielding layer is provided with two layers, the two layers of the shielding layer comprise an aluminum foil shielding layer and a copper wire braiding shielding layer, the aluminum foil shielding layer and the copper wire braiding shielding layer successively cover the inner insulation layer;

[0013] The graphene heat dissipation layer is attached to the outer periphery of the copper wire braiding shielding layer.

[0014] In some embodiments, the braiding density of the copper wire braiding shielding layer is not less than 80%.

[0015] In some embodiments, the inner insulation layer is a cross-linked polyethylene insulation layer, and the thickness thereof is greater than or equal to 1 mm and less than or equal to 2 mm.

[0016] In some embodiments, the outer sheath comprises an outer insulation layer and a wear-resistant protective layer, the outer insulation layer and the wear-resistant protective layer successively cover the graphene heat dissipation layer in a direction away from the conductor.

[0017] In some embodiments, the outer wall surface of the wear-resistant protective layer is provided with an anti-skid texture.

[0018] In some embodiments, the outer insulation layer is a silicone rubber insulation layer, and the thickness thereof is greater than or equal to 2 mm and less than or equal to 3 mm.

[0019] In some embodiments, the wear-resistant protective layer is a polyurethane protective layer, and the thickness thereof is greater than or equal to 1 mm and less than or equal to 1.5 mm.

[0020] Compared with the prior art, in the cable for new energy vehicles provided by the utility model, the graphene heat dissipation layer simultaneously contacts the inner sheath and the outer sheath, the filling gap is formed in the graphene heat dissipation layer, the heat-conducting silica gel is filled in the filling gap, and the heat-conducting silica gel also simultaneously contacts the inner sheath and the outer sheath, so that the uniformity and stability of heat transfer are ensured, the graphene heat dissipation band and the heat-conducting silica gel jointly heat, the amount of graphene is reduced, the heat-conducting silica gel with relatively low price is filled, the heat generated in the cable can be quickly conducted out, the temperature of the cable during high-load work is effectively reduced, and the service life and working reliability of the cable are improved, so that the cable has sufficient heat conduction performance while the cost of the cable is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view of the cable for new energy vehicles provided by the embodiment of the utility model.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1, conductor; 2, inner sheath; 21, inner insulation layer; 22, shielding layer; 221, aluminum foil shielding layer; 222, copper wire braided shielding layer; 3, heat dissipation structure; 4, outer sheath; 41, outer insulation layer; 42, wear-resistant protective layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0025] In order to solve the technical problem that the graphene sleeve is sleeved on the outer periphery of the conductor and cooperates with the heat dissipation block to achieve rapid heat dissipation, however, the whole graphene sleeve is made of graphene material, and the cost of graphene is relatively high, which increases the cost of the cable, the utility model provides a cable for new energy vehicles, which can realize common heat transfer of the graphene heat dissipation band and the heat-conducting silica gel, reduce the amount of graphene, fill with relatively low-cost heat-conducting silica gel, and quickly conduct the heat generated inside the cable out, effectively reduce the temperature of the cable when working under high load, improve the service life and working reliability of the cable, so as to reduce the cost of the cable while ensuring that the cable has sufficient heat dissipation performance.

[0026] Please refer to Figure 1 , Figure 1 It is a structure schematic view of the cable for new energy vehicles in the embodiment of the utility model, the cable for new energy vehicles includes conductor 1, inner sheath 2, heat dissipation structure 3 and outer sheath 4 covered in turn from inside to outside, wherein the heat dissipation structure 3 includes graphene heat dissipation layer and heat-conducting silica gel layer, the graphene heat dissipation layer is attached to the inner sheath 2 and the outer sheath 4, and the filling gap is formed, the heat-conducting silica gel layer is arranged in the filling gap, and is attached to the inner sheath 2 and the outer sheath 4.

[0027] The graphene heat dissipation layer contacts the inner sheath 2 and the outer sheath 4 simultaneously, and the filling gap is formed in the graphene heat dissipation layer, the heat-conducting silica gel is filled in the filling gap, and the heat-conducting silica gel also contacts the inner sheath 2 and the outer sheath 4 simultaneously, so that the uniformity and stability of heat transfer are ensured, the graphene heat dissipation band and the heat-conducting silica gel jointly heat, the graphene amount is reduced, the heat-conducting silica gel is filled with relatively low price, heat generated in the cable can be quickly conducted out, the temperature of the cable during high-load work is effectively reduced, and the service life and working reliability of the cable are improved, so that the cable has sufficient heat conduction performance, and the cable cost is reduced.

[0028] In one of the embodiments, the graphene heat dissipation layer comprises a plurality of graphene heat dissipation bands, the plurality of graphene heat dissipation bands are spirally wound on the outer periphery of the inner sheath 2, and the adjacent two graphene heat dissipation bands are arranged at intervals and form the filling gap.

[0029] In the embodiment, the graphene heat dissipation band is spirally wound on the outer periphery of the inner sheath 2, the contact area of the graphene heat dissipation band and the inner sheath 2 is as large as possible, the heat transfer uniformity is improved, and the spiral arrangement can also improve the flexibility of the cable. The heat-conducting silica gel is filled in the gap between the adjacent graphene heat dissipation bands, the uniformity and stability of heat transfer are ensured, the graphene heat dissipation band and the heat-conducting silica gel jointly heat, the graphene amount is reduced, heat generated in the cable can be quickly conducted out, the temperature of the cable during high-load work is effectively reduced, and the service life and working reliability of the cable are improved.

[0030] It should be understood that the heat dissipation structure 3 is composed of the graphene heat dissipation band and the heat-conducting silica gel, the graphene heat dissipation band is spirally wound on the outer side of the shielding layer 22, and the heat-conducting silica gel is filled between the adjacent heat dissipation sheets. The graphene has extremely high thermal conductivity and can quickly conduct heat generated in the cable out, and the heat-conducting silica gel ensures the uniformity and stability of heat transfer, effectively reduces the temperature of the cable during high-load work, and improves the service life and working reliability of the cable.

[0031] It should be noted that in the embodiment, the thickness of the graphene heat dissipation band of the heat dissipation structure 3 is 0.5 mm, the interval between the adjacent graphene heat dissipation bands is 3 mm, the heat-conducting silica gel is filled in the gap, and the overall thickness of the heat dissipation structure 3 is 1.5 mm.

[0032] In one of the embodiments, the inner sheath 2 comprises an inner insulation layer 21 and a shielding layer 22, and the inner insulation layer 21 and the shielding layer 22 cover the conductor 1 in sequence; and the graphene heat dissipation layer is attached to the outer periphery of the shielding layer 22.

[0033] In the embodiment, the inner sheath 2 is provided as the inner insulation layer 21 and the shielding layer 22, the conductor 1 is isolated by the inner sheath 2 to ensure the insulation of the cable, and the electromagnetic interference is isolated by the shielding layer 22, so that the cable can effectively resist the electromagnetic interference, and the high efficiency and safety of power transmission are ensured.

[0034] In one of the embodiments, the shielding layer 22 is provided with multiple layers, and the multiple shielding layers 22 are sequentially wrapped around the inner insulation layer 21. The graphene heat dissipation layer is attached to the shielding layer 22 away from the inner insulation layer 21.

[0035] In the embodiment, the shielding layer 22 is provided as a multi-layer structure to further improve the electromagnetic isolation capability of the cable. Specifically, in the scheme, the shielding layer 22 is a double-layer structure.

[0036] In one of the embodiments, the shielding layer 22 is provided with two layers, and the two shielding layers 22 include an aluminum foil shielding layer 221 and a copper wire braided shielding layer 222. The aluminum foil shielding layer 221 and the copper wire braided shielding layer 222 are sequentially wrapped around the inner insulation layer 21. The graphene heat dissipation layer is attached to the outer periphery of the copper wire braided shielding layer 222.

[0037] In the embodiment, the aluminum foil shielding layer 221 is tightly wrapped outside the inner insulation layer 21, which can effectively shield the electric field and prevent the influence of electromagnetic interference on the electronic equipment inside the vehicle. The copper wire braided shielding layer 222 is located outside the aluminum foil shielding layer 221, which not only further enhances the electromagnetic shielding effect but also plays a certain mechanical protection role to improve the overall strength of the cable.

[0038] In one of the embodiments, the braiding density of the copper wire braided shielding layer 222 is not less than 80%.

[0039] In the embodiment, the braiding density of the copper wire braided shielding layer 222 is not less than 80% to enhance the electromagnetic shielding effect and improve the mechanical protection role. Specifically, in the scheme, the copper wire braided shielding layer 222 is braided by copper wires with a diameter of 0.15 millimeters, and the braiding density is 85%. In addition, the thickness of the aluminum foil shielding layer 221 is 0.1 millimeter, which is tightly attached to the surface of the inner insulation layer 21.

[0040] In one of the embodiments, the inner insulation layer 21 is a cross-linked polyethylene insulation layer, and the thickness thereof is greater than or equal to 1 millimeter and less than or equal to 2 millimeters.

[0041] In the embodiment, the inner insulation layer 21 is made of cross-linked polyethylene material, with a thickness of 1-2 mm, which has good electrical insulation performance and heat resistance, can effectively prevent the conductor 1 from electric leakage, ensure the safe transmission of high-voltage electricity, and at the same time, to a certain extent, resist the high-temperature environment in the process of vehicle operation, and ensure the stability of the insulation performance. Specifically, in the scheme, the thickness of the inner insulation layer 21 is 1.5 mm. In addition, the conductor 1 is composed of 60 twisted tinned copper wires, and the diameter of each copper wire is 0.2 mm.

[0042] In one of the embodiments, the outer sheath 4 includes an outer insulation layer 41 and a wear-resistant protective layer 42, which are sequentially wrapped along the direction away from the conductor 1.

[0043] In the embodiment, the outer sheath 4 is set as the outer insulation layer 41 and the wear-resistant protective layer 42, which further enhances the insulation performance of the cable through the outer insulation layer 41, so that the cable can adapt to the use of new energy vehicles in complex and variable environments. At the same time, the wear-resistant protective layer 42 can effectively resist external force damage such as friction and extrusion during vehicle assembly and use, prolonging the service life of the cable.

[0044] In one of the embodiments, the outer wall surface of the wear-resistant protective layer 42 is provided with anti-slip texture.

[0045] In the embodiment, when the cable is assembled on the vehicle, because the outer wall surface of the wear-resistant protective layer 42 is provided with anti-slip texture, the friction between the cable and the surrounding parts can be enhanced, preventing the cable from being displaced due to vibration and other reasons during vehicle driving, and ensuring the connection stability of the cable. It should be noted that the specific setting form of the anti-slip texture is not limited, which can be one or a combination of concave-convex texture, mesh texture and strip texture.

[0046] In one of the embodiments, the outer insulation layer 41 is a silicone rubber insulation layer, and the thickness thereof is greater than or equal to 2 mm and less than or equal to 3 mm.

[0047] In the embodiment, the outer insulation layer 41 is made of high-temperature-resistant silicone rubber material, with a thickness of 2-3 mm. The silicone rubber has excellent heat resistance, cold resistance, aging resistance and weather resistance, can adapt to the complex and variable use environment of new energy vehicles, further enhance the insulation performance of the cable, and ensure the safe and stable transmission of high-voltage electricity under harsh conditions. Specifically, in the scheme, the thickness of the outer insulation layer 41 is 2.5 mm, and the silicone rubber material is wrapped outside the heat dissipation structure 3 by extrusion molding.

[0048] In one of the embodiments, the wear-resistant protective layer 42 is a polyurethane protective layer, and the thickness thereof is greater than or equal to 1 mm and less than or equal to 1.5 mm.

[0049] In this embodiment, the wear-resistant protective layer 42 is made of polyurethane material, and the thickness is 1-1.5 mm. The polyurethane material has good wear resistance and flexibility, and can effectively resist external force damage such as friction and extrusion during automobile assembly and use. Specifically, in this scheme, the thickness of the wear-resistant protective layer 42 is 1.2 mm, the polyurethane material is formed by injection molding process, and the wave-shaped anti-slip texture is processed on the surface.

[0050] In order to better understand the utility model, the following will be combined Figure 1 The technical scheme of the utility model is described in detail:

[0051] In the cable production process, first, the tinned copper wire is stranded to form the conductor 1, then the inner insulation layer 21, the wrapping aluminum foil shielding layer 221 and the copper wire braided shielding layer 222, the winding heat dissipation structure 3, the extruding outer insulation layer 41 and the injection molding wear-resistant protective layer 42 are extruded in sequence, through strict process control, ensure that each layer is tightly combined, and a new energy automobile high-voltage cable with excellent performance is manufactured.

[0052] In actual use, the cable can stably operate in the high-voltage system of the new energy automobile, the inner insulation layer 21 and the outer insulation layer 41 guarantee the insulation safety, the shielding layer 22 double-layer structure effectively shields electromagnetic interference, the heat dissipation structure 3 dissipates heat in time, and the wear-resistant protective layer 42 protects the cable from external damage, providing reliable power transmission support for efficient and safe operation of the new energy automobile.

[0053] Therefore, the new energy automobile high-voltage cable of the utility model optimizes the structure and material of each layer, has high voltage bearing capacity, good insulation performance, efficient heat dissipation capacity, excellent electromagnetic shielding effect and excellent wear resistance and protection performance, can meet the operation requirements of the new energy automobile high-voltage system under various complex working conditions, improve the power transmission efficiency and safety, reduce the automobile operation problems caused by cable failure, prolong the service life of the cable, reduce the maintenance cost, provide reliable power transmission guarantee for the development of the new energy automobile, and have obvious practicality and market promotion value.

[0054] The specific implementation mode of the utility model described above does not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cable for use in new energy vehicles, characterized in that, The device comprises, from the inside out, a conductor, an inner sheath, a heat dissipation structure, and an outer sheath. The heat dissipation structure includes a graphene heat dissipation layer and a thermally conductive silicone layer. The graphene heat dissipation layer is attached to the inner sheath and the outer sheath and forms a filling gap. The thermally conductive silicone layer is disposed in the filling gap and is attached to the inner sheath and the outer sheath.

2. The cable for new energy vehicles according to claim 1, characterized in that, The graphene heat dissipation layer includes multiple graphene heat dissipation strips, which are spirally wound around the outer periphery of the inner sheath. Adjacent graphene heat dissipation strips are spaced apart and form the filling gap.

3. The cable for new energy vehicles according to claim 1, characterized in that, The inner sheath includes an inner insulating layer and a shielding layer, wherein the inner insulating layer and the shielding layer sequentially cover the conductor; The graphene heat dissipation layer is attached to the outer periphery of the shielding layer.

4. The cable for new energy vehicles according to claim 3, characterized in that, The shielding layer has multiple layers, and the multiple shielding layers sequentially cover the inner insulating layer. The graphene heat dissipation layer is attached to the shielding layer that is away from the inner insulating layer.

5. The cable for new energy vehicles according to claim 4, characterized in that, The shielding layer has two layers, which include an aluminum foil shielding layer and a copper wire braided shielding layer. The aluminum foil shielding layer and the copper wire braided shielding layer sequentially cover the inner insulation layer. The graphene heat dissipation layer is attached to the outer periphery of the copper wire braided shielding layer.

6. The cable for new energy vehicles according to claim 5, characterized in that, The braiding density of the copper wire braided shielding layer is not less than 80%.

7. The cable for new energy vehicles according to claim 3, characterized in that, The inner insulation layer is a cross-linked polyethylene insulation layer with a thickness greater than or equal to 1 mm and less than or equal to 2 mm.

8. The cable for new energy vehicles according to claim 1, characterized in that, The outer sheath includes an outer insulating layer and a wear-resistant protective layer, and the outer insulating layer and the wear-resistant protective layer sequentially cover the graphene heat dissipation layer in a direction away from the conductor.

9. The cable for new energy vehicles according to claim 8, characterized in that, The outer insulation layer is a silicone rubber insulation layer with a thickness greater than or equal to 2 mm and less than or equal to 3 mm.

10. The cable for new energy vehicles according to claim 8, characterized in that, The wear-resistant protective layer is a polyurethane protective layer, and its thickness is greater than or equal to 1 mm and less than or equal to 1.5 mm.

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