CN117059308A - High-temperature-resistant shielding high-voltage cable for new energy automobile and preparation method thereof - Google Patents
High-temperature-resistant shielding high-voltage cable for new energy automobile and preparation method thereof Download PDFInfo
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- CN117059308A CN117059308A CN202311144368.0A CN202311144368A CN117059308A CN 117059308 A CN117059308 A CN 117059308A CN 202311144368 A CN202311144368 A CN 202311144368A CN 117059308 A CN117059308 A CN 117059308A
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- 238000002360 preparation method Methods 0.000 title description 9
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- 229920000459 Nitrile rubber Polymers 0.000 claims description 14
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 14
- -1 iron ions Chemical class 0.000 claims description 14
- 229920002530 polyetherether ketone Polymers 0.000 claims description 14
- 229920000734 polysilsesquioxane polymer Polymers 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
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- 238000000576 coating method Methods 0.000 claims description 13
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- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 12
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- 239000006087 Silane Coupling Agent Substances 0.000 claims description 12
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 12
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- ZWWLLYJRPKYTDF-UHFFFAOYSA-N thiophene-3,4-dicarboxylic acid Chemical compound OC(=O)C1=CSC=C1C(O)=O ZWWLLYJRPKYTDF-UHFFFAOYSA-N 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
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- ZZYYIZHQMCEKLG-UHFFFAOYSA-N 2,5-dibromothiophene-3,4-dicarboxylic acid Chemical compound OC(=O)C1=C(Br)SC(Br)=C1C(O)=O ZZYYIZHQMCEKLG-UHFFFAOYSA-N 0.000 claims description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229910001431 copper ion Inorganic materials 0.000 claims description 2
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- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 6
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 4
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 4
- 239000006023 eutectic alloy Substances 0.000 description 4
- 229910052733 gallium Inorganic materials 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 4
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- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- YCGAZNXXGKTASZ-UHFFFAOYSA-N thiophene-2,5-dicarboxylic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)S1 YCGAZNXXGKTASZ-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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- 150000003577 thiophenes Chemical class 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/0207—Wire harnesses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/32—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes natural resins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/427—Polyethers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
- H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mechanical Engineering (AREA)
- Insulated Conductors (AREA)
- Organic Insulating Materials (AREA)
Abstract
The application discloses a high-temperature resistant shielding high-voltage cable for a new energy automobile, which comprises a conductor, an insulating layer, a shielding layer and a sheath layer, wherein the insulating layer is arranged on the conductor; the insulating layer is arranged outside the conductor, the shielding layer is wrapped outside the insulating layer in a braiding mode, and the sheath layer is arranged outside the shielding layer; the insulating layer and the sheath layer are made of polyolefin cable materials resistant to high temperature of 125 ℃; the shielding layer is formed by compositely weaving MOF modified carbon fibers and copper wires, the weaving density is 75-80%, and the weaving angle is 65-75 degrees. The high-voltage cable solves the problems that the existing cable cannot achieve the excellent shielding effect, light weight and the like, and simultaneously meets the performance requirements of 125 ℃ high temperature resistance, wear resistance and the like.
Description
Technical Field
The application relates to the technical field of wires and cables, in particular to a high-temperature-resistant shielding high-voltage cable for a new energy automobile and a preparation method thereof.
Background
On the premise of advocating global environment protection at present, the new energy automobile industry is becoming the guiding and target of future automobile industry development. The new energy automobile is taken as one of the development directions of the automobile industry in China, and has huge market prospect. Different heat resistances of the new energy automobile wires can be suitable for different positions. The high-temperature resistant wire of 150 grade or above can be used for the part directly connected or contacted with heating equipment such as an engine and the like; the temperature of control lines such as a part far away from the heating part and connected with the instrument panel is 80/85 and 100/105. For the part where the heat-generating component is thermally radiated, 120/125-level electric wires are used. Therefore, the development of automobile cables with different temperature resistance levels is important for the demands of customers. The new energy automobile wire system can be divided into a high-voltage system and a low-voltage system. The high-voltage cable can generate electromagnetic waves around to influence the signal transmission of the control wire in the process of transmitting electric energy, and a shielding layer is usually added outside the high-voltage wire core. In the existing high-voltage cable, the shielding layer woven by copper wires only still has the problem of relatively low shielding effect; to achieve a high shielding effect, a thicker copper wire is generally used for braiding, which also causes an increase in weight of the cable and makes wiring of the cable in a complex, narrow automotive space environment difficult.
Disclosure of Invention
In view of the shortcomings of the prior art, one aspect of the application is to provide a high-temperature resistant shielding high-voltage cable for a new energy automobile, so as to solve the problems that the existing electric wire cannot achieve shielding effect and light weight, and simultaneously enable the electric wire to meet other service performance requirements of 125 ℃ high temperature resistance, wear resistance and the like.
In order to achieve the above purpose, the application adopts the following technical scheme:
the utility model provides a high temperature resistant shielding high voltage cable for new energy automobile, high voltage cable includes conductor, insulating layer, shielding layer and restrictive coating; the insulating layer is arranged outside the conductor, the shielding layer is wrapped outside the insulating layer in a braiding mode, and the sheath layer is arranged outside the shielding layer; the insulating layer and the sheath layer are made of polyolefin cable materials resistant to high temperature of 125 ℃; the shielding layer is formed by compositely weaving MOF modified carbon fibers and copper wires, the weaving density is 75-80%, and the weaving angle is 65-75 degrees. The shielding layer is formed by compositely weaving the MOF modified carbon fiber and the copper wire, has the advantages of both, improves the shielding effect of the high-voltage cable and reduces the weight of the high-voltage cable.
Preferably, the MOF modified carbon fiber is obtained by coating liquid metal with MOF, coupling the MOF coated liquid metal on the carbon fiber, freeze-drying and extruding. The liquid metal is a eutectic alloy compounded by 75.5 percent of gallium and 24.5 percent of indium. According to the application, liquid metal is dispersed into micro-droplets under the action of shearing force, and then ultrasonic dispersion is carried out in hydrogen peroxide solution to form the liquid metal with a surface insulating layer; meanwhile, the liquid metal has certain fluidity, and the MOF metal organic framework material with a porous structure is used as a support, so that the liquid metal is coated by the MOF metal organic framework material or filled in the MOF metal organic framework material, thereby being beneficial to promoting the uniform distribution of the liquid metal on the surface of the carbon fiber and reducing the consumption of the liquid metal; further, the MOF material coated with the liquid metal is grafted on the carbon fiber through the silane coupling agent, after freeze drying, the fluidity of the liquid metal is reduced, and the liquid metal micro-droplets are crushed through the action of extrusion force to reform a conductive path, so that the multilayer reinforced composite shielding carbon fiber with a stable interlayer structure is obtained. The composite shielding carbon fiber not only has excellent comprehensive mechanical properties, but also has the characteristics of strong shielding capability, light weight and the like.
Preferably, before MOF coating, the liquid metal is dispersed into micro-droplets under the action of shearing force, and then is ultrasonically dispersed in hydrogen peroxide solution to form the liquid metal with the surface insulating layer. According to the application, through the oxidation of hydrogen peroxide, a layer of oxidation insulating film layer is obtained on the surface of the liquid metal.
Preferably, the MOF is prepared by carrying out molecular self-assembly reaction on an organic ligand and a metal salt solution in a hydrothermal reaction kettle and is coated on the surface of liquid metal. The MOF of the application preferably carries out molecular self-assembly reaction between thiophene derivatives and metal ions such as copper, nickel, iron and the like to form a porous three-dimensional network structure, which not only has excellent supporting effect and thermal stability, but also has good conductivity, thereby further ensuring the shielding performance of the high-voltage cable.
Preferably, the organic ligand is at least one of 2, 2-bithiophene-5, 5-dicarboxylic acid, 3, 4-thiophene dicarboxylic acid, 2, 5-dibromo-thiophene-3, 4-dicarboxylic acid.
Preferably, the metal salt solution is a nitrate solution or a sulfate solution prepared from at least one of copper ions, nickel ions, and iron ions as a metal ion.
Preferably, the liquid metal is grafted onto the carbon fiber after MOF coating by a silane coupling agent.
Preferably, the operating pressure of the extrusion operation is 1 to 10MPa.
Preferably, the insulating layer and the sheath layer are composed of the following raw materials in parts by weight: 100 parts of polyolefin resin, 12-30 parts of nitrile rubber, 1-8 parts of polyether-ether-ketone, 1.5-3.5 parts of maleic anhydride grafted polyethylene, 1-10 parts of dioctyl phthalate, 2-7 parts of polyethylene wax, 1-3 parts of triallyl isocyanurate and 1-8 parts of octavinyl cage polysilsesquioxane. According to the application, polyolefin resin is used as a main component of the high-voltage cable, and a certain amount of nitrile rubber and polyether-ether-ketone are added, so that comprehensive mechanical properties and service properties such as wear resistance, impact resistance and high temperature resistance of the high-voltage cable are improved; the compatibility of each component is improved by adding the maleic anhydride grafted polyethylene; the high temperature resistance and the mechanical property of the high-voltage cable are further improved by adding octavinyl cage polysilsesquioxane.
Another aspect of the present application provides a method for preparing the high-temperature resistant shielded high-voltage cable for a new energy automobile, which includes the following steps:
s1: providing a conductor formed by twisting a plurality of bundles of conductor single wires;
s2: weighing the following raw materials in parts by weight: 100 parts of polyolefin resin, 12-30 parts of nitrile rubber, 1-8 parts of polyether-ether-ketone, 1.5-3.5 parts of maleic anhydride grafted polyethylene, 1-10 parts of dioctyl phthalate, 2-7 parts of polyethylene wax, 1-3 parts of triallyl isocyanurate and 1-8 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, the mixture is extruded by a double-screw extruder and then is wrapped outside a conductor obtained in the step S1, so that an insulating wire core with an insulating layer is obtained;
s3: respectively weaving MOF modified carbon fibers and copper wires as warps and wefts in a composite mode and wrapping the warps and the wefts outside one or more than one insulating wire cores obtained in the step S2 to obtain shielding wire cores with shielding layers;
s4: also, the following raw materials are weighed according to parts by weight: 100 parts of polyolefin resin, 12-30 parts of nitrile rubber, 1-8 parts of polyether-ether-ketone, 1.5-3.5 parts of maleic anhydride grafted polyethylene, 1-10 parts of dioctyl phthalate, 2-7 parts of polyethylene wax, 1-3 parts of triallyl isocyanurate and 1-8 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, the mixture is extruded by a double-screw extruder and then is wrapped outside the shielding wire core obtained in the step S3, so that the high-voltage cable is obtained.
The application has the beneficial effects that:
according to the high-voltage cable, the insulating layer and the sheath layer are made of polyolefin resin as main components, and the prepared high-voltage cable has excellent comprehensive mechanical properties and service performance such as wear resistance, impact resistance, 125 ℃ high temperature resistance and the like through compounding of nitrile rubber, polyether-ether-ketone, octavinyl cage polysilsesquioxane and other auxiliary agents.
According to the high-voltage cable, the MOF modified carbon fiber and the copper wire are respectively used as warps and wefts to be woven in a compounding mode to obtain the shielding layer, so that the shielding effect of the high-voltage cable is improved, the overall weight of the high-voltage cable is reduced, and the purpose of light-weight preparation is achieved.
In general, the high-voltage cable has the advantages of excellent shielding effect, 125 ℃ high temperature resistance, wear resistance, impact resistance and the like, light weight and long-term use under severe conditions of new energy automobiles.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the application. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Example 1
The high-temperature resistant shielding high-voltage cable for the new energy automobile comprises a conductor, an insulating layer, a shielding layer and a sheath layer; the insulating layer is arranged outside the conductor, the shielding layer is wrapped outside the insulating layer in a braiding mode, and the sheath layer is arranged outside the shielding layer; the insulating layer and the sheath layer are made of polyolefin cable materials resistant to high temperature of 125 ℃; the shielding layer is formed by compositely weaving MOF modified carbon fibers and copper wires, the weaving density is 75%, and the weaving angle is 65 degrees.
The MOF modified carbon fiber is obtained by coating liquid metal with MOF, coupling the MOF coated liquid metal on the carbon fiber, and freeze-drying and extruding the MOF coated liquid metal. The liquid metal is a eutectic alloy compounded by 55% gallium and 45% indium. Specifically, firstly, weighing 20g of liquid metal, placing the liquid metal in a ball mill, and performing high-speed ball milling for 6 hours, wherein the liquid metal is dispersed into micro-droplets under the action of shearing force; then, ultrasonically dispersing the mixture in 100mL of hydrogen peroxide solution with the mass concentration of 50% for 30min, and oxidizing the surface of the liquid metal by the oxidation of the hydrogen peroxide to form the liquid metal with the surface insulating layer; then transferring the mixture into a hydrothermal reaction kettle, adding 200mL of copper nitrate solution with the mass concentration of 30%, uniformly dispersing by ultrasonic, adding an organic ligand 2, 2-dithiophene-5, 5-dicarboxylic acid (adding according to the molar ratio of 2, 2-dithiophene-5, 5-dicarboxylic acid to copper nitrate of 1:1), heating to 60 ℃, and carrying out molecular self-assembly reaction on the organic ligand 2, 2-dithiophene-5, 5-dicarboxylic acid and the copper nitrate solution in the hydrothermal reaction kettle for 12 hours, and coating the liquid metal surface; then, immersing carbon fibers in a suspension compounded by liquid metal coated by MOF, a silane coupling agent and deionized water in a traction mode for reaction for 30min, so that the liquid metal is grafted on the carbon fibers through the silane coupling agent after the MOF is coated, and then freeze-drying for 4h, wherein the mass ratio of the liquid metal coated by MOF, the silane coupling agent and the deionized water is 10:1.5:100; and finally, extruding the carbon fiber subjected to the grafting modification treatment in an extruder, wherein the operation pressure of the extruding operation is 5MPa, and the liquid metal micro-droplets are extruded by the action of the extruding force to reform a conductive path, so that the multi-layer reinforced composite shielding carbon fiber with a stable interlayer structure, namely the MOF modified carbon fiber, is obtained.
The preparation method of the high-temperature-resistant shielding high-voltage cable for the new energy automobile comprises the following steps of:
s1: providing a conductor formed by twisting a plurality of bundles of conductor single wires;
s2: weighing the following raw materials of the polyolefin cable material resistant to 125 ℃ in parts by weight: 100 parts of polyethylene resin, 12 parts of nitrile rubber, 1 part of polyether-ether-ketone, 1.5 parts of maleic anhydride grafted polyethylene, 3 parts of dioctyl phthalate, 2 parts of polyethylene wax, 1.5 parts of triallyl isocyanurate and 4 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, extruding by a double-screw extruder (the temperature of each region of the double-screw extruder is respectively 120 ℃ in one region and 125 ℃ in two regions, 130 ℃ in three regions and 135 ℃ in four regions and 145 ℃ in a nose), wrapping the conductor obtained in the step S1 to obtain an insulating wire core with an insulating layer;
s3: respectively carrying out composite weaving on MOF modified carbon fibers and copper wires serving as warps and wefts and wrapping the warps and the wefts outside one or more than one insulating wire cores obtained in the step S2, wherein the weaving density is 75%, and the weaving angle is 65 degrees, so as to obtain a shielding wire core with a shielding layer;
s4: similarly, the following polyolefin cable material raw materials resistant to 125 ℃ are weighed according to parts by weight: 100 parts of polyethylene resin, 12 parts of nitrile rubber, 1 part of polyether-ether-ketone, 1.5 parts of maleic anhydride grafted polyethylene, 3 parts of dioctyl phthalate, 2 parts of polyethylene wax, 1.5 parts of triallyl isocyanurate and 4 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, extruding by a double-screw extruder (the temperature of each area of the double-screw extruder is respectively 120 ℃ in one area and 125 ℃ in two areas, 130 ℃ in three areas and 135 ℃ in four areas and 145 ℃ in a nose), and wrapping the shielding wire core obtained in the step S3 to obtain the high-voltage cable.
Example 2
The high-temperature resistant shielding high-voltage cable for the new energy automobile comprises a conductor, an insulating layer, a shielding layer and a sheath layer; the insulating layer is arranged outside the conductor, the shielding layer is wrapped outside the insulating layer in a braiding mode, and the sheath layer is arranged outside the shielding layer; the insulating layer and the sheath layer are made of polyolefin cable materials resistant to high temperature of 125 ℃; the shielding layer is formed by compositely weaving MOF modified carbon fibers and copper wires, the weaving density is 77%, and the weaving angle is 70 degrees.
The MOF modified carbon fiber is obtained by coating liquid metal with MOF, coupling the MOF coated liquid metal on the carbon fiber, and freeze-drying and extruding the MOF coated liquid metal. The liquid metal is a eutectic alloy compounded by 52% of gallium and 48% of indium. Specifically, firstly, weighing 20g of liquid metal, placing the liquid metal in a ball mill, and performing high-speed ball milling for 6 hours, wherein the liquid metal is dispersed into micro-droplets under the action of shearing force; then, ultrasonically dispersing the mixture in 100mL of hydrogen peroxide solution with the mass concentration of 50% for 30min, and oxidizing the surface of the liquid metal by the oxidation of the hydrogen peroxide to form the liquid metal with the surface insulating layer; transferring the solution to a hydrothermal reaction kettle, adding 200mL of 30% nickel nitrate solution by mass concentration, uniformly dispersing by ultrasonic, adding 3, 4-thiophene dicarboxylic acid serving as an organic ligand (adding according to the molar ratio of 3, 4-thiophene dicarboxylic acid to nickel nitrate of 1:1), heating to 65 ℃, and carrying out molecular self-assembly reaction on the 3, 4-thiophene dicarboxylic acid serving as the organic ligand and the nickel nitrate solution in the hydrothermal reaction kettle for 12 hours, and coating the solution on the surface of liquid metal; then, immersing carbon fibers in a suspension compounded by liquid metal coated by MOF, a silane coupling agent and deionized water in a traction mode for reaction for 25min, so that the liquid metal is grafted on the carbon fibers through the silane coupling agent after the MOF is coated, and then freeze-drying for 4h, wherein the mass ratio of the liquid metal coated by MOF, the silane coupling agent and the deionized water is (12): 2:100; and finally, extruding the carbon fiber subjected to the grafting modification treatment in an extruder, wherein the operation pressure of the extruding operation is 6MPa, and the liquid metal micro-droplets are extruded by the action of the extruding force to reform a conductive path, so that the multi-layer reinforced composite shielding carbon fiber with a stable interlayer structure, namely the MOF modified carbon fiber, is obtained.
The preparation method of the high-temperature-resistant shielding high-voltage cable for the new energy automobile comprises the following steps of:
s1: providing a conductor formed by twisting a plurality of bundles of conductor single wires;
s2: weighing the following raw materials of the polyolefin cable material resistant to 125 ℃ in parts by weight: 100 parts of polyethylene resin, 20 parts of nitrile rubber, 5 parts of polyether-ether-ketone, 2.5 parts of maleic anhydride grafted polyethylene, 5 parts of dioctyl phthalate, 5 parts of polyethylene wax, 2 parts of triallyl isocyanurate and 3 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, extruding by a double-screw extruder (the temperatures of all the areas of the double-screw extruder are respectively 120 ℃ in one area, 125 ℃ in two areas, 130 ℃ in three areas, 135 ℃ in four areas and 145 ℃ in a machine head), and wrapping the conductor obtained in the step S1 to obtain an insulating wire core with an insulating layer;
s3: respectively carrying out composite weaving on MOF modified carbon fibers and copper wires serving as warps and wefts and wrapping the warps and the wefts outside one or more than one insulating wire cores obtained in the step S2, wherein the weaving density is 77%, and the weaving angle is 70 degrees, so as to obtain a shielding wire core with a shielding layer;
s4: similarly, the following polyolefin cable material raw materials resistant to 125 ℃ are weighed according to parts by weight: 100 parts of polyethylene resin, 20 parts of nitrile rubber, 5 parts of polyether-ether-ketone, 2.5 parts of maleic anhydride grafted polyethylene, 5 parts of dioctyl phthalate, 5 parts of polyethylene wax, 2 parts of triallyl isocyanurate and 3 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, extruding by a double-screw extruder (the temperature of each area of the double-screw extruder is respectively 120 ℃ in one area, 125 ℃ in two areas, 130 ℃ in three areas, 135 ℃ in four areas and 145 ℃ in a machine head), and wrapping the shielding wire core obtained in the step S3 to obtain the high-voltage cable.
Example 3
The high-temperature resistant shielding high-voltage cable for the new energy automobile comprises a conductor, an insulating layer, a shielding layer and a sheath layer; the insulating layer is arranged outside the conductor, the shielding layer is wrapped outside the insulating layer in a braiding mode, and the sheath layer is arranged outside the shielding layer; the insulating layer and the sheath layer are made of polyolefin cable materials resistant to high temperature of 125 ℃; the shielding layer is formed by compositely weaving MOF modified carbon fibers and copper wires, the weaving density is 80%, and the weaving angle is 75 degrees.
The MOF modified carbon fiber is obtained by coating liquid metal with MOF, coupling the MOF coated liquid metal on the carbon fiber, and freeze-drying and extruding the MOF coated liquid metal. The liquid metal is a eutectic alloy compounded by 50% of gallium and 50% of indium. Specifically, firstly, weighing 20g of liquid metal, placing the liquid metal in a ball mill, and performing high-speed ball milling for 6 hours, wherein the liquid metal is dispersed into micro-droplets under the action of shearing force; then, ultrasonically dispersing the mixture in 100mL of hydrogen peroxide solution with the mass concentration of 50% for 30min, and oxidizing the surface of the liquid metal by the oxidation of the hydrogen peroxide to form the liquid metal with the surface insulating layer; transferring the mixture into a hydrothermal reaction kettle, adding 200mL of 30% ferric nitrate solution by mass concentration, uniformly dispersing by ultrasonic, adding an organic ligand 2, 5-thiophene dicarboxylic acid (adding according to the molar ratio of 2, 5-thiophene dicarboxylic acid to ferric nitrate of 1:1), heating to 70 ℃, and carrying out molecular self-assembly reaction on the organic ligand 2, 5-thiophene dicarboxylic acid and the ferric nitrate solution in the hydrothermal reaction kettle for 12 hours, and coating the mixture on the surface of liquid metal; then, immersing carbon fibers in a suspension compounded by liquid metal coated by MOF, a silane coupling agent and deionized water in a traction mode for reaction for 30min, enabling the liquid metal to be grafted on the carbon fibers through the silane coupling agent after the MOF is coated, and then freeze-drying for 4h, wherein the mass ratio of the liquid metal coated by MOF, the silane coupling agent and the deionized water is 15:3:100; and finally, extruding the carbon fiber subjected to the grafting modification treatment in an extruder, wherein the operation pressure of the extruding operation is 5MPa, and the liquid metal micro-droplets are extruded by the action of the extruding force to reform a conductive path, so that the multi-layer reinforced composite shielding carbon fiber with a stable interlayer structure, namely the MOF modified carbon fiber, is obtained.
The preparation method of the high-temperature-resistant shielding high-voltage cable for the new energy automobile comprises the following steps of:
s1: providing a conductor formed by twisting a plurality of bundles of conductor single wires;
s2: weighing the following raw materials of the polyolefin cable material resistant to 125 ℃ in parts by weight: 100 parts of polyethylene resin, 30 parts of nitrile rubber, 8 parts of polyether-ether-ketone, 3.5 parts of maleic anhydride grafted polyethylene, 10 parts of dioctyl phthalate, 7 parts of polyethylene wax, 3 parts of triallyl isocyanurate and 8 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, extruding by a double-screw extruder (the temperature of each region of the double-screw extruder is respectively 120 ℃ in one region, 125 ℃ in two regions, 130 ℃ in three regions, 135 ℃ in four regions and 145 ℃ in a machine head), and wrapping the conductor obtained in the step S1 to obtain an insulating wire core with an insulating layer;
s3: respectively carrying out composite weaving on MOF modified carbon fibers and copper wires serving as warps and wefts and wrapping the warps and the wefts outside one or more than one insulating wire cores obtained in the step S2, wherein the weaving density is 80%, and the weaving angle is 75 degrees, so as to obtain a shielding wire core with a shielding layer;
s4: similarly, the following polyolefin cable material raw materials resistant to 125 ℃ are weighed according to parts by weight: 100 parts of polyethylene resin, 30 parts of nitrile rubber, 8 parts of polyether-ether-ketone, 3.5 parts of maleic anhydride grafted polyethylene, 10 parts of dioctyl phthalate, 7 parts of polyethylene wax, 3 parts of triallyl isocyanurate and 8 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, extruding by a double-screw extruder (the temperature of each area of the double-screw extruder is respectively 120 ℃ in one area, 125 ℃ in two areas, 130 ℃ in three areas, 135 ℃ in four areas and 145 ℃ in a machine head), and wrapping the shielding wire core obtained in the step S3 to obtain the high-voltage cable.
Comparative example 1
The high-voltage cable of the comparative example is basically similar to the high-voltage cable of example 1 in terms of cable structure, raw material composition and preparation method thereof, and is mainly different in that the shielding layer copper wire is woven instead of MOF-modified carbon fiber.
Comparative example 2
The cable structure, the raw material composition and the preparation method of the high-voltage cable of the comparative example are basically similar to those of the embodiment 1, and the main difference is that the shielding layer is directly formed by braiding liquid metal coupling carbon fibers without MOF coating instead of MOF modified carbon fibers; the specific steps of the MOF-coated liquid metal coupled carbon fiber are basically the same as those of the embodiment 1, but the operation steps of molecular self-assembly reaction of the organic ligand 2, 2-bithiophene-5, 5-dicarboxylic acid and copper nitrate solution in a hydrothermal reaction kettle are not carried out.
The performance of the high-voltage cables prepared in examples 1 to 3 and comparative examples 1 to 2 was tested, and the performance results are shown in table 1:
electromagnetic shielding effectiveness test: the electromagnetic shielding effectiveness of the sample is tested in a wide frequency range of 4-18 GHz.
High temperature resistance test: the samples were heat treated at a temperature of 150 ℃ for 168 hours, and tested again for tensile strength retention, elongation at break retention, and electromagnetic shielding effectiveness retention.
Abrasion resistance test: the test was performed with reference to GB5013, the diameter of the scraping needle being 0.45mm and the scraping needle loading being 1.5kg.
Impact resistance test: the insulation or jacket layer of the sample was tested with reference to GB 1701.
Performance tests for tensile strength and elongation at break were also performed with reference to GB 1701.
TABLE 1
The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims.
Claims (10)
1. The high-temperature-resistant shielding high-voltage cable for the new energy automobile is characterized by comprising a conductor, an insulating layer, a shielding layer and a sheath layer; the insulating layer is arranged outside the conductor, the shielding layer is wrapped outside the insulating layer in a braiding mode, and the sheath layer is arranged outside the shielding layer; the insulating layer and the sheath layer are made of polyolefin cable materials resistant to high temperature of 125 ℃; the shielding layer is formed by compositely weaving MOF modified carbon fibers and copper wires, the weaving density is 75-80%, and the weaving angle is 65-75 degrees.
2. The high-temperature resistant shielding high-voltage cable for new energy automobiles according to claim 1, wherein the MOF modified carbon fiber is obtained by coating liquid metal with MOF, coupling the MOF modified carbon fiber on the carbon fiber, freeze-drying and extruding.
3. The high-temperature resistant shielding high-voltage cable for new energy automobiles according to claim 2, wherein the liquid metal is dispersed into micro-droplets under the action of shearing force before being coated by the MOF, and then is ultrasonically dispersed in hydrogen peroxide solution to form the liquid metal with a surface insulating layer.
4. The high-temperature resistant shielding high-voltage cable for new energy automobiles according to claim 2, wherein the MOF is prepared by carrying out molecular self-assembly reaction in a hydrothermal reaction kettle by using an organic ligand and a metal salt solution, and is coated on the surface of liquid metal.
5. The high-temperature resistant shielded high-voltage cable for new energy vehicles according to claim 2, wherein the organic ligand is at least one of 2, 2-bithiophene-5, 5-dicarboxylic acid, 3, 4-thiophenedicarboxylic acid, 2, 5-dibromo-thiophene-3, 4-dicarboxylic acid.
6. The high-temperature resistant shielded high-voltage cable for new energy automobile according to claim 2, wherein the metal salt solution is a nitrate solution or a sulfate solution prepared by using at least one of copper ions, nickel ions and iron ions as the metal ions.
7. The high-temperature resistant shielded high-voltage cable for new energy automobile according to claim 2, wherein the liquid metal is grafted on the carbon fiber through a silane coupling agent after the MOF coating.
8. The high-temperature resistant shielded high-voltage cable for new energy vehicles according to claim 2, wherein the operation pressure of the extrusion operation is 1 to 10MPa.
9. The high-temperature resistant shielding high-voltage cable for new energy automobiles as claimed in claim 1, wherein the insulating layer and the sheath layer are composed of the following raw materials in parts by weight: 100 parts of polyolefin resin, 12-30 parts of nitrile rubber, 1-8 parts of polyether-ether-ketone, 1.5-3.5 parts of maleic anhydride grafted polyethylene, 1-10 parts of dioctyl phthalate, 2-7 parts of polyethylene wax, 1-3 parts of triallyl isocyanurate and 1-8 parts of octavinyl cage polysilsesquioxane.
10. A method for preparing the high-temperature resistant shielding high-voltage cable for new energy automobiles according to any one of claims 1 to 9, which comprises the following steps:
s1: providing a conductor formed by twisting a plurality of bundles of conductor single wires;
s2: weighing the following raw materials in parts by weight: 100 parts of polyolefin resin, 12-30 parts of nitrile rubber, 1-8 parts of polyether-ether-ketone, 1.5-3.5 parts of maleic anhydride grafted polyethylene, 1-10 parts of dioctyl phthalate, 2-7 parts of polyethylene wax, 1-3 parts of triallyl isocyanurate and 1-8 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, the mixture is extruded by a double-screw extruder and then is wrapped outside a conductor obtained in the step S1, so that an insulating wire core with an insulating layer is obtained;
s3: respectively weaving MOF modified carbon fibers and copper wires as warps and wefts in a composite mode and wrapping the warps and the wefts outside one or more than one insulating wire cores obtained in the step S2 to obtain shielding wire cores with shielding layers;
s4: also, the following raw materials are weighed according to parts by weight: 100 parts of polyolefin resin, 12-30 parts of nitrile rubber, 1-8 parts of polyether-ether-ketone, 1.5-3.5 parts of maleic anhydride grafted polyethylene, 1-10 parts of dioctyl phthalate, 2-7 parts of polyethylene wax, 1-3 parts of triallyl isocyanurate and 1-8 parts of octavinyl cage-type polysilsesquioxane, and after being uniformly mixed, the mixture is extruded by a double-screw extruder and then is wrapped outside the shielding wire core obtained in the step S3, so that the high-voltage cable is obtained.
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| CN108192165A (en) * | 2017-12-28 | 2018-06-22 | 扬州曙光电缆股份有限公司 | A kind of ageing-resistant low wind speed wind energy generating set special cable |
| US20210162388A1 (en) * | 2019-12-02 | 2021-06-03 | Center for Innovative Materials and Architectures | METAL ORGANIC FRAMEWORKS (MOFs) AND METHODS OF SYNTHESIZING AND USING THE SAME |
| CN115732127A (en) * | 2022-11-09 | 2023-03-03 | 山东大学 | Carbon nanotube/graphene/magnetic MOF composite broadband shielding cable and preparation method thereof |
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| CN108192165A (en) * | 2017-12-28 | 2018-06-22 | 扬州曙光电缆股份有限公司 | A kind of ageing-resistant low wind speed wind energy generating set special cable |
| US20210162388A1 (en) * | 2019-12-02 | 2021-06-03 | Center for Innovative Materials and Architectures | METAL ORGANIC FRAMEWORKS (MOFs) AND METHODS OF SYNTHESIZING AND USING THE SAME |
| CN115732127A (en) * | 2022-11-09 | 2023-03-03 | 山东大学 | Carbon nanotube/graphene/magnetic MOF composite broadband shielding cable and preparation method thereof |
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