CN114420347B - Cable for new energy automobile, preparation method and application - Google Patents
Cable for new energy automobile, preparation method and application Download PDFInfo
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- CN114420347B CN114420347B CN202210171700.1A CN202210171700A CN114420347B CN 114420347 B CN114420347 B CN 114420347B CN 202210171700 A CN202210171700 A CN 202210171700A CN 114420347 B CN114420347 B CN 114420347B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 98
- 229910052751 metal Inorganic materials 0.000 claims abstract description 82
- 239000002184 metal Substances 0.000 claims abstract description 82
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 claims abstract description 58
- 239000002131 composite material Substances 0.000 claims abstract description 46
- 239000011224 oxide ceramic Substances 0.000 claims abstract description 41
- 229910052574 oxide ceramic Inorganic materials 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims description 112
- 230000006698 induction Effects 0.000 claims description 108
- 229910052782 aluminium Inorganic materials 0.000 claims description 87
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 87
- 238000000034 method Methods 0.000 claims description 42
- 230000035939 shock Effects 0.000 claims description 32
- 229920002379 silicone rubber Polymers 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 16
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 14
- 239000004945 silicone rubber Substances 0.000 claims description 11
- 238000010030 laminating Methods 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 230000017105 transposition Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 239000010410 layer Substances 0.000 description 183
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 20
- 229910052802 copper Inorganic materials 0.000 description 18
- 239000010949 copper Substances 0.000 description 18
- 239000007788 liquid Substances 0.000 description 12
- 230000002500 effect on skin Effects 0.000 description 7
- 239000011241 protective layer Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 238000009954 braiding Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
- H01B7/303—Conductors comprising interwire insulation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Conductors (AREA)
Abstract
The invention provides a cable for a new energy automobile, a preparation method and application thereof, wherein the cable comprises a conductor, an insulating layer and a shielding layer are sequentially laminated on the outer surface of the conductor, the conductor comprises at least two composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by twisting at least one metal strand, and the outer surfaces of the metal strands are subjected to micro-arc oxidation to form an oxide ceramic film. The invention improves the current-carrying capacity due to the micro-arc oxidation treatment of the conductor surface, has excellent insulating property, and can play a good shielding effect by arranging the shielding layer.
Description
Technical Field
The invention belongs to the technical field of new energy automobiles, relates to a cable, and particularly relates to a new energy automobile cable, a preparation method and application thereof.
Background
In recent years, new energy automobiles are rapidly developed on a large scale due to the energy-saving and environment-friendly properties, cables serving as important matching products of the new energy automobiles are rapidly developed, the performance is continuously perfect, certain flexibility and tear resistance are achieved, and meanwhile, the new energy automobiles are required to have high and low temperature resistance, waterproof performance, high current resistance and shielding performance.
CN104835565A discloses a cable for a charging device of a new energy automobile, which comprises a conductor, a cable core and an outer sheath, wherein the cable core is formed by twisting a plurality of insulating wire cores into a cable, and a filling rope is arranged in a gap between the cable cores; the cable core and the filling rope are externally wrapped with a wrapping band layer, a copper wire braided shielding layer is arranged outside the wrapping band layer, and the outermost layer of the cable is extruded with a thermoplastic polyurethane elastomer rubber sheath layer; the insulated wire core is composed of a copper core soft conductor and a thermoplastic vulcanized rubber insulating layer extruded outside the copper core soft conductor.
CN113035438a discloses a new energy automobile charges with high-power charging cable for connect charging stake and rifle that charges, include: an outer sheath; the liquid cooling wire core is arranged in the outer sheath and comprises at least two liquid cooling wire cores; the auxiliary wire core is arranged in the outer sheath, and two ends of the auxiliary wire core are respectively connected with the charging pile and the charging gun; the temperature measuring device is arranged in the outer sheath; switching device, liquid cooling sinle silk one end is connected with the rifle that charges, and the other end is connected with the stake that charges through switching device, the liquid cooling sinle silk with auxiliary wire core is parallelly connected, switching device includes: the liquid cooling wire core is provided with a plurality of liquid cooling wire cores, the liquid cooling wire cores are connected with a liquid cooling wire core, the liquid cooling wire core is connected with a liquid cooling wire core, and the liquid cooling wire core is connected with a liquid cooling wire core; and the motor drives the switching disc to rotate.
CN112331400a discloses a high-voltage cable in car for new energy automobile, including the high-voltage cable body, the high-voltage cable originally includes tinned copper stranded conductor, the cover is equipped with the silicone rubber insulating layer on the surface of tinned copper stranded conductor, the cover is equipped with the sheath on the surface of silicone rubber insulating layer, be provided with tinned copper wire shielding between silicone rubber insulating layer and the sheath.
At present, in order to increase the power and current carrying of the cable, a mode of increasing the conductor cross-sectional area of the cable is generally adopted, but the flexibility of the cable is weakened due to the increase of the conductor cross-sectional area of the cable, and the flexibility is correspondingly deteriorated. Therefore, it is important to increase the power and current carrying capacity of the cable while maintaining an effective conductor cross section.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a cable for a new energy automobile, a preparation method and application thereof, wherein a micro-arc oxidation is adopted on the surface of a conductor to form an oxide ceramic layer, so that the insulation shielding effect is achieved, metal wires are in a non-conductive state, the skin effect is reduced, the current-carrying capacity of the conductor is increased, the insulation layer is used as a protective layer, the insulation performance is excellent, and the shielding layer is adopted to achieve a good shielding effect.
To achieve the purpose, the invention adopts the following technical scheme:
In a first aspect, the invention provides a cable for a new energy automobile, the cable comprises a conductor, an insulating layer and a shielding layer are sequentially laminated on the outer surface of the conductor, the conductor comprises at least two composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by twisting at least one metal strand, and the outer surfaces of the metal strands are subjected to micro-arc oxidation to form an oxide ceramic film.
According to the cable for the new energy automobile, the micro-arc oxidation is adopted on the surface of the conductor to form the oxide ceramic layer, so that the insulation shielding effect is achieved, the metal wires are in a non-conductive state, the skin effect is reduced, meanwhile, the current-carrying capacity of the conductor is increased, the insulation layer is used as a protective layer, the insulation performance is excellent, and the shielding layer is adopted to achieve a good shielding effect.
As a preferred embodiment of the present invention, the cross-sectional area of the conductor is 6 to 120mm 2, for example 6mm2、10mm2、16mm2、35mm2、50mm2、70mm2、90mm2、95mm2 or 120mm 2, but the present invention is not limited to the listed values, and other values not listed in the range are equally applicable.
Preferably, the metal strands are twisted from metal wires.
Preferably, the metal strands are formed by twisting 6 to 54 metal wires, for example, 6, 12, 18, 24, 30, 36, 42, 48 or 54 metal strands, but the metal strands are not limited to the listed values, and other non-listed values within the range are equally applicable, and more preferably 18 to 30 metal strands.
The diameter of the wire is preferably 0.5 to 1.5mm, and may be, for example, 0.5mm, 0.55mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm, but is not limited to the recited values, and other non-recited values within the range of values are equally applicable.
The conductor in the invention is of a multi-layer structure, each composite layer is formed by twisting a plurality of metal strands, the number of the metal strands in each composite layer increases from inside to outside along the radial direction, and a plurality of composite layers are sequentially laminated to obtain the conductor. The present invention is not particularly limited or restricted to the twisting direction of the metal strands, and may be, for example, left-hand twisting or right-hand twisting from inside to outside in the radial direction, or alternatively left-hand twisting or right-hand twisting from inside to outside in the radial direction.
The thickness of the oxide ceramic film is preferably 10 to 60. Mu.m, and may be, for example, 10 μm, 12 μm, 13 μm, 15 μm, 18 μm, 20 μm, 23 μm, 25 μm, 28 μm, 30 μm, 35 μm, 40 μm, 42 μm, 45 μm, 50 μm, 52 μm, 55 μm, 57 μm, 58 μm or 60 μm, but is not limited to the listed values, and other non-listed values within the range are equally applicable.
Preferably, the wire comprises an aluminum wire.
Preferably, the oxide ceramic film comprises an alumina ceramic film.
In a preferred embodiment of the present invention, the thickness of the insulating layer is 0.3 to 0.6mm, for example, 0.3mm, 0.32mm, 0.33mm, 0.38mm, 0.4mm, 0.43mm, 0.45mm, 0.5mm, 0.53mm, 0.55mm, 0.58mm or 0.6mm, but the thickness is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned numerical range are equally applicable, and preferably 0.35 to 0.5mm.
Preferably, the insulating layer comprises a silicone rubber insulating layer.
As a preferred embodiment of the present invention, the shielding layer includes a tin-plated copper layer or an aluminum layer.
In a second aspect, the present invention provides a method for preparing the cable according to the first aspect, the method comprising the steps of:
Drawing metal to obtain metal wires, forming an oxide ceramic film through micro-arc oxidation, twisting to form metal strands, and regularly twisting the metal strands to obtain a conductor;
(ii) preparing an insulating layer on the surface of the conductor in step (i);
and (III) preparing a shielding layer on the outer surface of the insulating layer formed in the step (II) to obtain the cable.
In the step (I), 6 to 54 metal wires are stranded to form metal strands, the metal strands are regularly stranded to form a composite layer, and the composite layer is sequentially laminated to obtain the conductor.
Preferably, in the micro-arc oxidation process, the positive-negative term pulse ratio is (4-6): 1, for example, may be 4:1, 4.5:1, 5:1, 5.5:1 or 6:1, but is not limited to the recited values, and other non-recited values within the range of values are equally applicable, and further preferably 5:1.
Preferably, the duty cycle is (0.8-1.5): 1 in the micro-arc oxidation process, for example, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, 1.3:1 or 1.5:1, but not limited to the recited values, other non-recited values within the range are equally applicable, and more preferably 1:1.
Preferably, in the micro-arc oxidation process, the alternating current frequency is 45-60 Hz, for example, 45Hz, 46Hz, 47Hz, 48Hz, 49Hz, 50Hz, 51Hz, 52Hz, 53Hz, 54Hz, 55Hz, 56Hz, 57Hz, 58Hz, 59Hz or 60Hz, but not limited to the recited values, and other non-recited values in the numerical range are equally applicable, and more preferably 50Hz.
Preferably, in the micro-arc oxidation process, the constant current is 3.8-5.2A/dm 2, for example 3.8A/dm2、3.9A/dm2、4.0A/dm2、4.1A/dm2、4.2A/dm2、4.3A/dm2、4.4A/dm2、4.5A/dm2、4.6A/dm2、4.7A/dm2、4.8A/dm2、4.9A/dm2、5.0A/dm2、5.1A/dm2 or 5.2A/dm 2, but not limited to the listed values, and other non-listed values in the range are equally applicable, and more preferably 4.4A/dm 2.
In the micro-arc oxidation process, the temperature of the cooling cycle may be, for example, 20℃to 30℃and may be, for example, 20℃21℃22℃23℃24℃25℃26℃27℃28℃29℃or 30℃but is not limited to the values listed, and other values not listed in the range are applicable, and more preferably 25 ℃.
As a preferred embodiment of the present invention, in the step (ii), the preparing an insulating layer includes: and extruding silicon rubber on the surface of the conductor by adopting an infrared induction heating process and vulcanizing.
Preferably, the infrared induction heating process comprises the steps of sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating, so as to realize extrusion and vulcanization of the silicone rubber.
It should be noted that, in the invention, a process of one thermal shock heating and four infrared induction heating is adopted, and the thermal shock makes the surface of the silicone rubber rapidly vulcanized so as to avoid surface scratch, and the four subsequent infrared induction heating can ensure that the silicone rubber is vulcanized sufficiently.
Preferably, the thermal shock is performed in a thermal shock furnace, and the first-stage infrared induction heating, the second-stage infrared induction heating, the third-stage infrared induction heating and the fourth-stage infrared induction heating are performed in the infrared induction heating furnace respectively.
The thermal shock is preferably 500 to 1000 ℃, and may be 500 ℃, 550 ℃, 600 ℃, 650 ℃, 700 ℃, 750 ℃, 800 ℃, 850 ℃, 900 ℃, 950 ℃, or 1000 ℃, for example, but is not limited to the recited values, and other values not recited in the range of values are equally applicable.
The temperature of the first stage of infrared induction heating is preferably 260 to 320 ℃, and may be 260 ℃, 265 ℃, 270 ℃, 275 ℃, 280 ℃, 285 ℃, 290 ℃, 295 ℃, 300 ℃, 310 ℃, 315 ℃ or 320 ℃, for example, but is not limited to the values listed, and other values not listed in the range are equally applicable.
The second stage of infrared induction heating is preferably performed at a temperature of 300 to 350 ℃, and may be, for example, 300 ℃, 305 ℃, 310 ℃, 315 ℃, 320 ℃, 325 ℃, 330 ℃, 335 ℃, 340 ℃, 345 ℃ or 350 ℃, but is not limited to the values listed, and other values not listed in the range are equally applicable.
The temperature of the third stage of infrared induction heating is preferably 300 to 350 ℃, and may be 300 ℃, 305 ℃, 310 ℃, 315 ℃, 320 ℃, 325 ℃, 330 ℃, 335 ℃, 340 ℃, 345 ℃ or 350 ℃, for example, but is not limited to the values listed, and other values not listed in the range are equally applicable.
The temperature of the fourth stage of infrared induction heating is preferably 350 to 400 ℃, and may be, for example, 350 ℃, 355 ℃, 360 ℃, 365 ℃, 370 ℃, 375 ℃, 380 ℃, 385 ℃, 390 ℃, 395 ℃ or 400 ℃, but is not limited to the values listed, and other values not listed in the range are equally applicable.
Preferably, the operation speed of the heating tunnel in the infrared induction heating process is 3-10 m/min, for example 3m/min、3.2m/min、3.5m/min、4m/min、4.5m/min、5m/min、6m/min、7m/min、8m/min、9m/min、9.2m/min、9.5m/min、9.8m/min or 10m/min, but is not limited to the listed values, and other values not listed in the range of values are equally applicable.
The running speed refers to the running speed of the conductor in the thermal shock furnace or the heating furnace in the process of preparing the insulating layer.
In the step (iii), the shielding layer is prepared by using tin-plated copper or aluminum tubes as a preferable technical scheme of the invention.
Preferably, the preparing the shielding layer includes: and braiding tin-plated copper wires to form a tin-plated copper layer, and sleeving the tin-plated copper layer on the outer surface of the insulating layer.
Preferably, the preparing the shielding layer includes: and forming an oxide ceramic film on the surface of one side of the aluminum pipe, which is close to the insulating layer, through micro-arc oxidation to obtain an aluminum layer, and sleeving the aluminum layer on the outer surface of the insulating layer.
When the aluminum layer is used as the shielding layer, the surface of one side of the aluminum pipe, which is close to the insulating layer, is subjected to micro-arc oxidation to form the ceramic oxide film in the preparation process, so that the double-insulation effect can be achieved.
As a preferable technical scheme of the invention, the preparation method specifically comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 6-54 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layer to obtain a conductor, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is (4-6) 1, the duty ratio is (0.8-1.5) 1, the alternating frequency is 45-60 Hz, the constant current is 3.8-5.2A/dm 2, and the temperature of the cooling circulation is 20-30 ℃;
(2) Sequentially carrying out thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor to extrude and vulcanize the silicon rubber on the surface of the conductor to obtain an insulating layer, wherein the thermal shock temperature is 500-1000 ℃, the first-stage infrared induction heating temperature is 260-320 ℃, the second-stage infrared induction heating temperature is 300-350 ℃, the third-stage infrared induction heating temperature is 300-350 ℃, the fourth-stage infrared induction heating temperature is 350-400 ℃, and the running speed is 3-10 m/min;
(3) Braiding a tinned copper wire to obtain a tinned copper layer, or carrying out micro-arc oxidation on an aluminum pipe to obtain an aluminum layer, and sleeving the tinned copper layer or the aluminum layer on the outer surface of the insulating layer formed in the step (2) to obtain the cable.
In a third aspect, the present invention provides a use of the cable according to the first aspect, in a new energy vehicle.
The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.
Compared with the prior art, the invention has the beneficial effects that:
According to the cable for the new energy automobile, the preparation method and the application, the micro-arc oxidation is adopted on the surface of the conductor to form the oxide ceramic layer, so that the insulation shielding effect is achieved, the metal wires are in a non-conductive state, the skin effect is reduced, the current-carrying capacity of the conductor is increased, the insulation layer is used as a protective layer, the insulation performance is excellent, and the shielding layer can achieve a good shielding effect.
Drawings
Fig. 1 is a schematic structural diagram of a cable for a new energy automobile according to an embodiment of the present invention.
Wherein 1-conductor; 2-an insulating layer; 3-shielding layer.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
In a specific embodiment, as shown in fig. 1, the cable for the new energy automobile comprises a conductor 1, wherein an insulating layer 2 and a shielding layer 3 are sequentially laminated on the outer surface of the conductor 1, the conductor 1 comprises at least two composite layers sequentially laminated from inside to outside along the radial direction, the composite layers are formed by twisting at least one metal strand, and the outer surfaces of the metal strands are subjected to micro-arc oxidation to form an oxide ceramic film.
Further, the cross-sectional area of the conductor 1 is 6 to 120mm 2.
The metal strands are formed by twisting metal wires.
The metal strands are formed by twisting 6 to 54 metal wires, and more preferably 18 to 30 metal wires.
The diameter of the metal wire is 0.5-1.5 mm. The thickness of the oxide ceramic film is 10-60 mu m.
The metal wire comprises an aluminum wire. The oxide ceramic membrane comprises an aluminum oxide ceramic membrane.
Further, the thickness of the insulating layer 2 is 0.3 to 0.6mm, preferably 0.35 to 0.5mm.
The insulating layer 2 comprises a silicon rubber insulating layer 2.
Further, the shielding layer 3 comprises a tinned copper layer or an aluminum layer.
In another embodiment, the invention provides a method for preparing the cable according to one embodiment, which comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an alumina ceramic film through micro-arc oxidation, twisting 6-54 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor 1, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is (4-6) 1, the duty ratio is (0.8-1.5) 1, the alternating frequency is 45-60 Hz, the constant current is 3.8-5.2A/dm 2, and the temperature of the cooling circulation is 20-30 ℃;
(2) Sequentially carrying out thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor 1 to extrude and vulcanize the silicon rubber on the surface of the conductor 1 to obtain an insulating layer 2, wherein the thermal shock temperature is 500-1000 ℃, the first-stage infrared induction heating temperature is 260-320 ℃, the second-stage infrared induction heating temperature is 300-350 ℃, the third-stage infrared induction heating temperature is 300-350 ℃, the fourth-stage infrared induction heating temperature is 350-400 ℃, and the running speed is 3-10 m/min;
(3) Braiding a tinned copper wire to obtain a tinned copper layer, or carrying out micro-arc oxidation on the surface of one side of the aluminum pipe, which is close to the insulating layer 2, to form an oxide ceramic film to obtain an aluminum layer, and sleeving the tinned copper layer or the aluminum layer on the outer surface of the insulating layer 2 formed in the step (2) to obtain the cable.
Example 1
The embodiment provides a cable for a new energy automobile, which comprises a conductor 1, wherein the cross section area of the conductor 1 is 120mm 2, the conductor 1 comprises composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by regularly twisting metal strands, and the number of the metal strands of each composite layer increases from inside to outside along the radial direction. Each metal strand is formed by stranding 24 aluminum wires, the diameter of each aluminum wire is 1mm, and the outer surface of each aluminum wire is subjected to micro-arc oxidation to form an aluminum oxide ceramic film with the thickness of 30 mu m. The thickness of the insulating layer 2 and the thickness of the insulating layer 2 of the shielding layer 3 are 0.4mm, the insulating layer 2 is made of silicon rubber insulating layer 2, and the shielding layer 3 is an aluminum layer.
The preparation method of the cable comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 24 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor 1, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is 5:1, the duty ratio is 1:1, the alternating frequency is 50Hz, the constant current is 4.4A/dm 2, and the temperature of the cooling circulation is 25 ℃;
(2) Sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor 1 to extrude and vulcanize the silicon rubber on the surface of the conductor 1 to obtain an insulating layer 2, wherein the thermal shock temperature is 900 ℃, the first-stage infrared induction heating temperature is 300 ℃, the second-stage infrared induction heating temperature is 325 ℃, the third-stage infrared induction heating temperature is 330 ℃, the fourth-stage infrared induction heating temperature is 380 ℃, and the running speed is 5.5m/min;
(3) And forming an oxide ceramic film on the surface of one side of the aluminum pipe, which is close to the insulating layer 2, through micro-arc oxidation to obtain an aluminum layer serving as a shielding layer 3, and sleeving the shielding layer 3 on the outer surface of the insulating layer 2 to obtain the cable.
Example 2
The embodiment provides a cable for a new energy automobile, which comprises a conductor 1, wherein the cross section area of the conductor 1 is 6mm 2, the conductor 1 comprises composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by regularly twisting metal strands, and the number of the metal strands of each composite layer increases from inside to outside along the radial direction. Each metal strand is formed by twisting 6 aluminum wires, the diameter of each aluminum wire is 0.5mm, and the outer surface of each aluminum wire is subjected to micro-arc oxidation to form an alumina ceramic film with the thickness of 10 mu m. The thickness of the insulating layer 2 and the thickness of the insulating layer 2 of the shielding layer 3 are 0.3mm, the insulating layer 2 is made of silicon rubber insulating layer 2, and the shielding layer 3 is an aluminum layer.
The preparation method of the cable comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 6 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor 1, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is 4:1, the duty ratio is 0.8:1, the alternating frequency is 45Hz, the constant current is 3.8A/dm 2, and the temperature of the cooling circulation is 20 ℃;
(2) Sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor 1 to extrude and vulcanize the silicon rubber on the surface of the conductor 1 to obtain an insulating layer 2, wherein the thermal shock temperature is 500 ℃, the first-stage infrared induction heating temperature is 260 ℃, the second-stage infrared induction heating temperature is 300 ℃, the third-stage infrared induction heating temperature is 300 ℃, the fourth-stage infrared induction heating temperature is 350 ℃, and the running speed is 5.5m/min;
(3) And weaving the tinned copper wires to form a tinned copper layer, and sleeving the tinned copper layer on the outer surface of the insulating layer 2 to obtain the cable.
Example 3
The embodiment provides a cable for a new energy automobile, which comprises a conductor 1, wherein the cross section area of the conductor 1 is 35mm 2, the conductor 1 comprises composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by regularly twisting metal strands, and the number of the metal strands of each composite layer increases from inside to outside along the radial direction. Each metal strand is formed by twisting 18 aluminum wires, the diameter of each aluminum wire is 0.8mm, and the outer surface of each aluminum wire is subjected to micro-arc oxidation to form an aluminum oxide ceramic film with the thickness of 20 mu m. The thickness of the insulating layer 2 and the thickness of the insulating layer 2 of the shielding layer 3 are 0.35mm, the insulating layer 2 is made of silicon rubber insulating layer 2, and the shielding layer 3 is an aluminum layer.
The preparation method of the cable comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 18 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor 1, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is 4.5:1, the duty ratio is 0.9:1, the alternating frequency is 48Hz, the constant current is 4A/dm 2, and the temperature of the cooling circulation is 25 ℃;
(2) Sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor 1 to extrude and vulcanize the silicon rubber on the surface of the conductor 1 to obtain an insulating layer 2, wherein the thermal shock temperature is 800 ℃, the first-stage infrared induction heating temperature is 280 ℃, the second-stage infrared induction heating temperature is 310 ℃, the third-stage infrared induction heating temperature is 330 ℃, the fourth-stage infrared induction heating temperature is 365 ℃, and the running speed is 4m/min;
(3) And forming an oxide ceramic film on the surface of one side of the aluminum pipe, which is close to the insulating layer 2, through micro-arc oxidation to obtain an aluminum layer serving as a shielding layer 3, and sleeving the shielding layer 3 on the outer surface of the insulating layer 2 to obtain the cable.
Example 4
The embodiment provides a cable for a new energy automobile, which comprises a conductor 1, wherein the cross section area of the conductor 1 is 95mm 2, the conductor 1 comprises composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by regularly twisting metal strands, and the number of the metal strands of each composite layer increases from inside to outside along the radial direction. Each metal strand is formed by stranding 30 aluminum wires, the diameter of each aluminum wire is 1.2mm, and the outer surface of each aluminum wire is subjected to micro-arc oxidation to form an aluminum oxide ceramic film with the thickness of 50 mu m. The thickness of the insulating layer 2 and the thickness of the insulating layer 2 of the shielding layer 3 are 0.45mm, the insulating layer 2 is made of silicon rubber insulating layer 2, and the shielding layer 3 is an aluminum layer.
The preparation method of the cable comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 30 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor 1, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is 5:1, the duty ratio is 1:1, the alternating frequency is 55Hz, the constant current is 5A/dm 2, and the temperature of the cooling circulation is 28 ℃;
(2) Sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor 1 to extrude and vulcanize the silicon rubber on the surface of the conductor 1 to obtain an insulating layer 2, wherein the thermal shock temperature is 700 ℃, the first-stage infrared induction heating temperature is 310 ℃, the second-stage infrared induction heating temperature is 340 ℃, the third-stage infrared induction heating temperature is 340 ℃, the fourth-stage infrared induction heating temperature is 380 ℃, and the running speed is 8m/min;
(3) And forming an oxide ceramic film on the surface of one side of the aluminum pipe, which is close to the insulating layer 2, through micro-arc oxidation to obtain an aluminum layer serving as a shielding layer 3, and sleeving the shielding layer 3 on the outer surface of the insulating layer 2 to obtain the cable.
Example 5
The embodiment provides a cable for a new energy automobile, which comprises a conductor 1, wherein the cross section area of the conductor 1 is 120mm 2, the conductor 1 comprises composite layers which are sequentially laminated from inside to outside along the radial direction, the composite layers are formed by regularly twisting metal strands, and the number of the metal strands of each composite layer increases from inside to outside along the radial direction. Each metal strand is formed by twisting 54 aluminum wires, the diameter of each aluminum wire is 0.8mm, and the outer surface of each aluminum wire is subjected to micro-arc oxidation to form an aluminum oxide ceramic film with the thickness of 58 mu m. The thickness of the insulating layer 2 and the thickness of the insulating layer 2 of the shielding layer 3 are 0.45mm, the insulating layer 2 is made of silicon rubber insulating layer 2, and the shielding layer 3 is an aluminum layer.
The preparation method of the cable comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 54 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor 1, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is 6:1, the duty ratio is 1:1, the alternating frequency is 60Hz, the constant current is 5.2A/dm 2, and the temperature of the cooling circulation is 30 ℃;
(2) Sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor 1 to extrude and vulcanize the silicon rubber on the surface of the conductor 1 to obtain an insulating layer 2, wherein the thermal shock temperature is 1000 ℃, the first-stage infrared induction heating temperature is 320 ℃, the second-stage infrared induction heating temperature is 350 ℃, the third-stage infrared induction heating temperature is 350 ℃, the fourth-stage infrared induction heating temperature is 400 ℃, and the running speed is 9m/min;
(3) And weaving the tinned copper wires to form a tinned copper layer, and sleeving the tinned copper layer on the outer surface of the insulating layer 2 to obtain the cable.
Example 6
The present example provides a new energy automobile cable differing from example 1 in that the thickness of the alumina ceramic film in the conductor 1 is 5 μm, and the remaining process parameters and operation conditions are exactly the same as those of example 1.
Example 7
The present example provides a new energy automobile cable differing from example 1 in that the thickness of the alumina ceramic film in the conductor 1 is 75 μm, and the remaining process parameters and operating conditions are exactly the same as those of example 1.
Comparative example 1
The comparative example provides a new energy automobile cable, which is different from example 1 in that in the preparation process of the conductor 1 in the step (1), no micro-arc oxidation is performed, i.e., no alumina ceramic film is formed on the outer surface of the aluminum wire, and the rest of the process parameters and operation conditions are exactly the same as those in example 1.
Comparative example 2
This comparative example provides a new energy automobile cable differing from example 1 in that no thermal shock process was performed during the preparation of the insulating layer 2 in step (2), and the remaining process parameters and operation conditions were exactly the same as those of example 1.
Comparative example 3
The comparative example provides a new energy automobile cable, which is different from example 1 in that in the preparation process of the insulating layer 2 in step (2), the thermal shock process is replaced by infrared induction heating at 400 ℃, and the other process parameters and operation conditions are identical to those of example 1.
Comparative example 4
The present comparative example provides a cable for a new energy automobile, which is different from example 1 in that the fourth stage of the infrared induction heating process is not performed in the preparation process of the insulating layer 2 in step (2), and the remaining process parameters and operation conditions are exactly the same as those of example 1.
Comparative example 5
The comparative example provides a new energy automobile cable, which is different from example 1 in that in the preparation process of the shielding layer 3 in step (3), the surface of the aluminum tube is not subjected to micro-arc oxidation, i.e. an oxide ceramic film is not formed on the surface of one side of the aluminum tube, which is close to the insulating layer 2, and the other process parameters and operation conditions are identical to those of example 1.
Performance test:
The electrical resistivity of conductor 1 of the cables of examples 1 to 7 and comparative examples 1 to 5 at a temperature of 20℃was measured, and the results are shown in Table 1:
TABLE 1
The temperature of the cable surface (heating time 1 h) was measured at a rated voltage of 8.5/10kV for the cables of example 1, examples 6 to 7 and comparative examples 1 to 5, and the results are shown in Table 2:
TABLE 2
As can be seen from Table 1, the electrical cable 1 for new energy automobile provided in examples 1-7 of the present invention has lower resistivity, while the electrical resistivity of the electrical cable 1 in comparative example 1 is higher than that of the electrical cable 1 in examples 1-7, because the electrical cable in examples 1-7 adopts micro-arc oxidation to form an oxide ceramic film on the surface of the electrical cable 1, thereby having insulation shielding effect, making the metal wires in non-conductive state, and reducing the electrical resistivity of the electrical cable 1. The resistivity of the conductor 1 obtained in examples 6 and 7 was improved as compared with example 1, because when the thickness of the oxide ceramic film formed on the surface of the aluminum wire in example 6 was too low, the ceramic layer was liable to fall off, and a good insulating effect was not obtained, resulting in an increase in the resistivity of the conductor 1; in addition, when the thickness of the oxide ceramic film formed on the surface of the aluminum wire of example 7 is too high, poor heat dissipation of the conductor is caused, and the current-carrying capacity of the cable is further affected, and the resistivity of the conductor 1 is also increased.
As can be seen from table 2, compared with example 1, the temperature of the cable surface obtained in example 6 is higher than that of example 1 at different test currents, because when the thickness of the oxide ceramic film formed on the aluminum wire surface of example 6 is too low, the oxide film cannot be effectively formed on the surface of the conductor 1, so that the skin effect cannot be effectively reduced, the resistance of the conductor 1 is increased, the resistivity of the conductor 1 is increased, the power loss is correspondingly increased, and the temperature is increased; the cable surface temperature change obtained in example 7 was not significant compared to example 1, and the degree of reduction of the skin effect was not significant even if the thickness of the oxide ceramic film formed on the aluminum wire surface was increased.
Compared with the embodiment 1, the temperature of the surface of the cable obtained in the comparative example 1 is higher than that of the embodiment 1 under different test currents, because the aluminum wire outer side surface in the comparative example 1 is not formed with an aluminum oxide ceramic film, the cable of the embodiment 1 adopts micro-arc oxidation to form the aluminum oxide ceramic film on the surface of the conductor 1, the skin effect is reduced, the heat conductivity coefficient is increased, the temperature is prevented from rising too fast, and the current-carrying capacity of the conductor 1 is increased.
As can be seen from table 2, the temperature of the cable surface obtained in comparative example 2 was higher than that of example 1 under different current conditions, because the thermal shock was not performed in the preparation process of the insulating layer 2 in comparative example 2, the surface vulcanization speed of the silicone rubber was slow, and the insulating effect of the insulating layer 2 was further affected. In addition, the temperature of the cable surface obtained in comparative example 3 was higher than that of example 1 under different current conditions, because the thermal shock was replaced by infrared induction heating at 400 ℃ during the preparation of the insulating layer 2, which also resulted in a slower vulcanization rate of the silicone rubber surface, thereby affecting the insulating effect of the insulating layer 2. The temperature of the cable surface obtained in comparative example 4 was higher than that of example 1 under different current conditions, and was because the fourth stage of infrared induction heating process was not performed in the preparation process of the insulating layer 2, the vulcanization of the silicone rubber on the surface of the conductor 1 was insufficient, and the insulating effect of the insulating layer 2 was affected.
Compared with the embodiment 1, the temperature of the surface of the cable obtained in the comparative example 5 is slightly increased, because the surface of the aluminum tube is subjected to micro-arc oxidation in the preparation process of the shielding layer 3 in the embodiment 1, the double insulation effect is achieved, and the shielding effect of the cable is improved.
According to the cable for the new energy automobile, the micro-arc oxidation is adopted on the surface of the conductor 1 to form the oxide ceramic layer, so that an insulating shielding effect is achieved, the metal wires are in a non-conductive state, the skin effect is reduced, meanwhile, the current-carrying capacity of the conductor 1 is increased, the insulating layer 2 is used as a protective layer, the insulating performance is excellent, and a good shielding effect can be achieved by adopting the shielding layer 3.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (24)
1. The utility model provides a cable for new energy automobile, its characterized in that, the cable include the conductor, the surface of conductor has laminated insulating layer and shielding layer in proper order, the conductor include along radial from inside to outside two at least composite bed that laminate in proper order, the composite bed form by at least one metal strand transposition, the surface of metal strand forms the oxidation ceramic membrane through micro-arc oxidation, the technological parameter of micro-arc oxidation process is: the positive and negative pulse ratio is (4-6) 1, the duty ratio is (0.8-1.5) 1, the alternating frequency is 45-60 Hz, the constant current is 3.8-5.2A/dm 2, the cooling circulation temperature is 20-30 ℃, so that the metal strands are in a non-conductive state;
the insulation layer comprises a silicon rubber insulation layer, the insulation layer is manufactured by extruding silicon rubber on the surface of the conductor through an infrared induction heating process and vulcanizing, the infrared induction heating process comprises the steps of sequentially carrying out thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating, the temperature of the thermal shock is 500-1000 ℃, the temperature of the first-stage infrared induction heating is 260-320 ℃, the temperature of the second-stage infrared induction heating is 300-350 ℃, the temperature of the third-stage infrared induction heating is 300-350 ℃, the temperature of the fourth-stage infrared induction heating is 350-400 ℃, and the thickness of the insulation layer is 0.35-0.5 mm;
The shielding layer is an aluminum layer, the aluminum layer is prepared by forming an oxide ceramic film on the surface of one side of the aluminum pipe, which is close to the insulating layer, through micro-arc oxidation, and the aluminum layer is sleeved on the outer surface of the insulating layer.
2. The cable of claim 1, wherein the conductor has a cross-sectional area of 6 to 120mm 2.
3. The cable of claim 1, wherein the metal strands are stranded from metal wires.
4. A cable according to claim 3, wherein the metal strands are twisted from 6 to 54 metal wires.
5. The cable of claim 4, wherein the metal strands are stranded from 18 to 30 metal wires.
6. The cable of claim 4, wherein the wire has a diameter of 0.5 to 1.5mm.
7. The cable of claim 1, wherein the thickness of the oxide ceramic film is 10 to 60 μm.
8. The cable of claim 4 wherein said wire comprises aluminum wire.
9. The cable of claim 1 wherein said ceramic oxide film comprises an alumina ceramic film.
10. A method of producing a cable according to any one of claims 1 to 9, said method comprising the steps of:
Drawing metal to obtain metal wires, forming an oxide ceramic film through micro-arc oxidation, twisting to form metal strands, and regularly twisting the metal strands to obtain a conductor;
(ii) preparing an insulating layer on the surface of the conductor in step (i);
and (III) preparing a shielding layer on the outer surface of the insulating layer formed in the step (II) to obtain the cable.
11. The method of claim 10, wherein in step (i), 6 to 54 metal wires are twisted to form metal strands, the metal strands are normally twisted to form a composite layer, and the composite layers are sequentially laminated to obtain the conductor.
12. The method of claim 10, wherein the positive to negative pulse ratio is 5:1 during the micro-arc oxidation.
13. The method of claim 10, wherein the duty cycle during the micro-arc oxidation is 1:1.
14. The method of claim 10, wherein the ac frequency during the micro-arc oxidation is 50Hz.
15. The method of claim 10, wherein the constant current is 4.4A/dm 2 during the micro-arc oxidation.
16. The method of claim 10, wherein the temperature of the cooling cycle during the micro-arc oxidation is 25 ℃.
17. The method of claim 10, wherein in step (ii), the preparing the insulating layer comprises: and extruding silicon rubber on the surface of the conductor by adopting an infrared induction heating process and vulcanizing.
18. The method according to claim 17, wherein the infrared induction heating process comprises sequentially performing thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating, so as to extrude and vulcanize the silicone rubber.
19. The method according to claim 18, wherein the thermal shock is performed in a thermal shock furnace, and the first-stage infrared induction heating, the second-stage infrared induction heating, the third-stage infrared induction heating and the fourth-stage infrared induction heating are performed in an infrared induction heating furnace, respectively.
20. The method of claim 17, wherein the infrared induction heating process is operated at a speed of 3-10 m/min in the drying tunnel.
21. The method of claim 10, wherein in step (iii), the shielding layer is prepared using an aluminum tube.
22. The method of claim 21, wherein preparing the shielding layer comprises: and forming an oxide ceramic film on the surface of one side of the aluminum pipe, which is close to the insulating layer, through micro-arc oxidation to obtain an aluminum layer, and sleeving the aluminum layer on the outer surface of the insulating layer.
23. The preparation method according to claim 10, characterized in that the preparation method specifically comprises the following steps:
(1) Drawing aluminum wires to obtain aluminum wires, forming an aluminum oxide ceramic film through micro-arc oxidation, twisting 6-54 aluminum wires into strands to form metal strands, regularly twisting the metal strands into a composite layer, and sequentially laminating the composite layers to obtain a conductor, wherein the technological parameters of the micro-arc oxidation process are as follows: the positive and negative pulse ratio is (4-6) 1, the duty ratio is (0.8-1.5) 1, the alternating frequency is 45-60 Hz, the constant current is 3.8-5.2A/dm 2, and the temperature of the cooling circulation is 20-30 ℃;
(2) Sequentially carrying out thermal shock, first-stage infrared induction heating, second-stage infrared induction heating, third-stage infrared induction heating and fourth-stage infrared induction heating on the conductor to extrude and vulcanize the silicon rubber on the surface of the conductor to obtain an insulating layer, wherein the thermal shock temperature is 500-1000 ℃, the first-stage infrared induction heating temperature is 260-320 ℃, the second-stage infrared induction heating temperature is 300-350 ℃, the third-stage infrared induction heating temperature is 300-350 ℃, the fourth-stage infrared induction heating temperature is 350-400 ℃, and the running speed is 3-10 m/min;
(3) And (3) carrying out micro-arc oxidation on the aluminum pipe to obtain an aluminum layer, and sleeving the aluminum layer on the outer surface of the insulating layer formed in the step (2) to obtain the cable.
24. Use of the cable according to any one of claims 1-9 in a new energy vehicle.
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| JP5499935B2 (en) * | 2009-10-05 | 2014-05-21 | 日立金属株式会社 | Shielded cable |
| CN103952742B (en) * | 2014-04-22 | 2016-06-08 | 上海理工大学 | Copper conductor with insulating barrier and preparation method thereof |
| CN110828035B (en) * | 2019-11-15 | 2023-08-25 | 远东电缆有限公司 | High-heat-conductivity cable for vehicle and production process thereof |
| CN111893540B (en) * | 2020-07-15 | 2021-08-10 | 东莞理工学院 | Preparation method of aluminum-silicon alloy micro-arc oxidation film layer |
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| CN105097080A (en) * | 2015-09-09 | 2015-11-25 | 浙江晨光电缆股份有限公司 | Oxide film adhered low-skin-effect power cable and manufacturing method thereof |
| CN107190298A (en) * | 2017-05-23 | 2017-09-22 | 桂林电子科技大学 | A kind of method that micro-arc oxidation of aluminum alloy surface black film layer |
| CN107610825A (en) * | 2017-09-30 | 2018-01-19 | 远东电缆有限公司 | A kind of new-energy automobile high temperature resistant flexible cable for connecting and its production technology |
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