CN117457274A - Heat dissipation type charging pile cable and production process thereof - Google Patents

Heat dissipation type charging pile cable and production process thereof Download PDF

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Publication number
CN117457274A
CN117457274A CN202311259708.4A CN202311259708A CN117457274A CN 117457274 A CN117457274 A CN 117457274A CN 202311259708 A CN202311259708 A CN 202311259708A CN 117457274 A CN117457274 A CN 117457274A
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CN
China
Prior art keywords
heat dissipation
charging pile
type charging
cable
insulating layer
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Pending
Application number
CN202311259708.4A
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Chinese (zh)
Inventor
张艳敏
金玲燕
王超
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Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
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Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
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Application filed by Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd filed Critical Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority to CN202311259708.4A priority Critical patent/CN117457274A/en
Publication of CN117457274A publication Critical patent/CN117457274A/en
Pending legal-status Critical Current

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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
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/428—Heat conduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1008—Features relating to screening tape per se
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • H01B13/147—Feeding of the insulating material
    • 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
    • H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
    • 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
    • H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
    • 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
    • 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
    • H01B7/1895—Internal space filling-up means
    • 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
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
    • H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention relates to the technical field of cables, in particular to a heat-dissipation type charging pile cable and a production process thereof. The utility model aims at enabling to charge the stake cable when charging, can dispel the heat to the cable fast, under the circumstances that does not change the volume of holding, improves the length of time of use of cable, and cable weight compares traditional cable lighter, more convenient to use.

Description

Heat dissipation type charging pile cable and production process thereof
Technical Field
The invention relates to the technical field of cables, in particular to a heat dissipation type charging pile cable and a production process thereof.
Background
Along with the continuous influence of the national support force on the new energy automobile and the continuous demands of families on the new energy automobile, the new energy electric automobile has the characteristics of no pollution, low carbon emission and the like compared with the traditional automobile, has wide market application prospect, and along with the wide popularization and industrialization application of the electric automobile, the electric automobile charging pile cable demand is multiplied.
The use requirements of users on new energy automobiles are higher and higher, the requirements on the running speed of the vehicles, the requirements on the endurance mileage of the vehicles and the requirements on the rapidness of the charging time of the vehicles are reflected, the high-power charging is completed in a short time, which means the transmission of larger current, and the rapid charging current of the electric automobiles can reach 400A or even higher according to the suggestions given by the International society of automotive Engineers.
At present, the mode of realizing the rapid charging of the new energy automobile mainly comprises direct current charging, wherein a main insulation wire core of a used cable is two phases, and the main insulation wire core is respectively connected with a power supply and the anode and the cathode of a battery for charging. The direct current charging pile has the characteristics of low voltage and high current, and the charging speed requirement of the new energy automobile is faster and faster, so that the current-carrying capacity requirement on the cable is higher and higher, the charging pile cable produced in the industry at present is thicker and heavier, and the temperature-resistant requirement on the insulating material is higher. The diameter of the cable becomes thick and heavy, so that the user has inconvenience in use, and the insulating material adopted by the existing charging pile cable can generally bear the problem of 130 ℃ and above in heat resistance, but the heat conduction and heat dissipation performance is poor, the temperature of the cable can rise faster in the charging process, the cable is heated and cooled for a long time, the cable is easy to age and quicken, and the service life of the cable is reduced.
Disclosure of Invention
Therefore, the invention aims to provide the heat dissipation type charging pile cable and the production process thereof, so that the heat dissipation type charging pile cable can rapidly dissipate heat of the cable when the charging pile cable is charged, the service life of the cable is prolonged under the condition that the retention amount is not changed, and the weight of the cable is lighter than that of the traditional cable, and the cable is more convenient to use.
The invention solves the technical problems by the following technical means:
the utility model provides a heat dissipation formula fills electric pile cable, includes power core and cladding at the outer restrictive coating of sinle silk, be provided with the conductor in the power core, be provided with the heat conduction insulating layer on the conductor, the cooling tube is established to the cover on the heat conduction insulating layer, the cooling tube intussuseption is filled with the coolant liquid, the cooling tube can be used to the coolant liquid circulation flow in the cooling tube.
According to the technical means, the heat radiating pipe is coated on the heat conducting insulating layer, so that on one hand, heat generated by a conductor can enter the heat radiating pipe through the heat conducting insulating layer, and therefore, the heat is dissipated under the cooling of cooling liquid of the heat radiating pipe, the temperature of the conductor is lowered, the charging time of a cable is prolonged, and the cable is suitable for high-power charging; on the other hand, the radiating pipe is arranged on the heat conducting insulating layer, so that the cooling liquid is prevented from being in direct contact with the conductor, the radiating effect is relatively reduced, the material requirement on the heat conducting insulating layer is reduced, and the process production condition is also reduced, so that the production cost is reduced. And the weight of the whole cable is reduced relatively by selecting the conductor material and the heat-conducting insulating material, so that the weight of the cable is reduced by 6-12% compared with the traditional charging pile cable under the condition of the same length and sectional area, and the weight of the cable is reduced.
Preferably, the radiating pipe comprises a radiating pipe body and a partition piece, wherein the radiating pipe body is coated on the heat conducting insulating layer, the partition piece is arranged in the radiating pipe body, and the partition piece is used for dividing the radiating pipe body into a liquid inlet channel and a liquid outlet channel.
According to the technical means, the radiating pipe body is divided into the liquid inlet channel and the liquid outlet channel through the partition piece, so that the heat dissipation of the conductor can be realized through one pipeline, the heat dissipation effect is better, and meanwhile, the use quantity of the pipelines is reduced, and the production difficulty is reduced.
Preferably, the separator is provided in one of a spiral shape, a straight plate shape, and an arc shape.
According to the technical means, through the arrangement of the partition pieces with different shapes, the cooling liquid can circulate in the radiating pipe body for different time, so that different radiating efficiencies are brought, and the cooling liquid can be selected according to actual use conditions.
Preferably, the heat-conducting insulating layer is made of rubber and modified heat-conducting filler.
Preferably, the conductor is one of stranded copper-aluminum alloy, stranded copper wire and stranded aluminum wire.
Further preferably, the conductor is a stranded aluminum copper aluminum alloy wire, and compared with a pure copper conductor, the conductor has lighter weight and is beneficial to light weight.
Preferably, the cable comprises a control wire core, a shielding layer and a filler, wherein the control wire core comprises a signal wire and a control wire, the signal wire and the control wire are arranged outside the power wire core, the filler is filled among the signal wire, the control wire and the power wire core, the shielding layer is wrapped on the filler, and the sheath layer is wrapped on the shielding layer.
The application also discloses a production process of the heat dissipation type charging pile cable, which comprises the following steps:
s1, preprocessing, namely mixing the modified heat-conducting filler, the vulcanizing agent, the reinforcing agent, the auxiliary materials and the rubber to obtain an insulating layer material for later use;
s2, twisting the wires into conductors through a wire twisting device, enabling the conductors to move through a cabling device, extruding an insulating layer material on the conductors through an extrusion molding device, enabling the insulating layer material to pass through a spark machine, and sleeving a radiating tube on the insulating layer through a threading device to obtain a power wire core;
s3, one or more power wire cores are passed through a cabling device again, stranded with the control wire cores and the filler on the power wire cores, spirally wrapped on the control wire cores and the filler by a wrapping device, extruded on the shielding layer by an extrusion molding device, and cooled to obtain a cable not filled with cooling liquid;
s4, closing the opening of the radiating pipe at one end of the radiating pipe 3, and closing the radiating pipe at the other end of the radiating pipe through a joint to obtain the radiating type charging pile cable.
According to the technical means, the power wire core is prepared firstly, then the cable with one or more power wire cores is prepared according to the type of the cable, the cable is more convenient, in addition, no cooling liquid is added in the production process, and the cooling liquid is added after the production is finished, so that the production difficulty is reduced, and the production efficiency is improved.
Preferably, in the step S1, the preparation method of the modified heat conductive filler specifically includes the following steps:
ball milling spherical a-alumina and cubic boron nitride to nano shape, transferring into a mixer, adding aluminate coupling agent, stirring for 20-30min at 40-60 ℃ to obtain surface treated inorganic powder; adding polyethylene glycol 200 and diatomite into the inorganic powder, performing ultrasonic treatment for 10-20min, washing after ultrasonic treatment, and drying to obtain the modified heat-conducting filler.
Because spherical a-alumina has better heat conductivity and relatively low price, and simultaneously, after a large amount of filling, the spherical a-alumina has better heat conductivity, the system viscosity has little influence, and cubic boron nitride has higher heat conductivity, but the price is more expensive, and after a large amount of filling, the system viscosity is greatly improved. By adopting spherical a-alumina as a matrix and cubic boron nitride as a guide way, the heat conductivity of the heat conducting filler is improved and the influence on the viscosity of the system is reduced under the condition of reducing the use cost.
Ball milling spherical a-alumina and cubic boron nitride to 10-20nm, and surface treatment with aluminate coupling agent to make the spherical a-alumina and cubic boron nitride mix with polyethylene glycol 200 and coarse diatomite and adsorb homogeneously under ultrasonic condition to form homogeneous heat conducting path in the pore diameter of coarse diatomite.
Preferably, in the step S3, the shielding layer is an aluminum-plastic composite belt, and the lapping overlapping rate is 20-35%.
According to the technical means, on one hand, the shielding effect can be achieved, on the other hand, the aluminum-plastic composite belt is adopted, the wrapping overlapping rate is 20-35%, and the weight of the shielding layer can be reduced.
Preferably, in the step S4, when the opening end of the radiating pipe is closed, the sealing is performed by adopting a manner of welding and matching with the sealing plug, and when the sealing is performed by the joint, the joint is provided with two channels, one channel is communicated with the liquid inlet channel, and the other channel is communicated with the liquid outlet channel.
According to the technical means, on one hand, the sealing is realized by adopting a mode of welding and matching with the sealing head, so that leakage can be avoided when the cooling liquid in the radiating pipe circularly flows, and on the other hand, the sealing is realized through the joint, and the filling and the circulation of the cooling liquid are facilitated.
The application adopting the scheme has the following beneficial effects:
1. according to the scheme, the heat conducting insulating layer is coated on the aluminum copper alloy conductor, the heat conductivity coefficient of the heat conducting insulating layer is 5.3-5.9W/m.K, the heat radiating pipe is arranged on the heat conducting insulating layer, cooling liquid circularly flows in the heat radiating pipe, and through the mutual matching of the heat conducting insulating layer and the heat radiating pipe, on one hand, heat generated by the conductor can enter the heat radiating pipe through the heat conducting insulating layer, so that the heat is dissipated under the cooling of the cooling liquid of the heat radiating pipe, the temperature of the conductor is reduced, the charging time of a cable is prolonged, and the cable is suitable for high-power charging; on the other hand, the heat conduction pipe is arranged on the heat conduction insulating layer, so that the direct contact of the cooling liquid with the conductor is avoided, the heat dissipation effect is relatively reduced, the material requirement on the heat conduction insulating layer is reduced, and the process production condition is also reduced, so that the production cost is reduced;
2. by selecting the conductor material, the heat-conducting insulating material, the filler and the shielding layer material, the weight of the whole cable is relatively reduced, the weight of the cable is reduced by 6-12% compared with the traditional charging pile cable under the condition of the same length and sectional area, and the lightweight of the cable is facilitated
3. The power wire core is produced firstly, then the cable with one or more power wire cores is prepared according to the type of the cable, the production is more convenient, in addition, no cooling liquid is added in the production process, and the cooling liquid is added after the production is finished, so that the production difficulty is reduced, and the production efficiency is improved.
Drawings
The present application may be further illustrated by the non-limiting examples given in the accompanying drawings;
fig. 1 is a schematic structural diagram of a heat dissipation type charging pile cable according to an embodiment of the present application;
FIG. 2 is a schematic view of a spiral separator in an embodiment of the present application;
FIG. 3 is a schematic view of a structure of a separator in a straight plate shape in an embodiment of the present application;
FIG. 4 is a schematic view of an arcuate divider in an embodiment of the present application;
FIG. 5 is a graph showing the heat dissipation effect in embodiments 1-7 of the present application;
wherein, 1, conductor; 2. an insulating layer; 3. a heat radiating pipe; 3-1, spiral shape; 3-2, a straight plate shape; 3-3, arc shape; 4. a signal line; 41. a control line; 42. a filling rope; 5. a shielding layer; 6. and a sheath layer.
Detailed Description
The following specific examples are presented to illustrate the embodiments of the present invention and to enable those skilled in the art to make and use the present invention as disclosed herein:
embodiment 1, production process one of heat dissipation type charging pile cable
In this embodiment, in the material of the insulating layer 2, the rubber is ethylene propylene diene monomer, the third monomer of ethylene propylene diene monomer is EBN, the vulcanizing agent is di-tert-butyl peroxide, the reinforcing agent is white carbon black, and the auxiliary material is an anti-aging agent RD.
Preparation of insulating layer 2 Material
Ball milling 10 parts by mass of spherical a-alumina and 0.8 part by mass of cubic boron nitride together to 10-20nm, then transferring into a mixer, adding 1.2 parts by mass of aluminate coupling agent, and stirring for 20-30min at 40-60 ℃ to obtain spherical a-alumina and cubic boron nitride with surface treatment; adding 1.8 parts by mass of polyethylene glycol 200 and 10 parts by mass of coarse diatomite and enough water into spherical alpha-alumina and cubic boron nitride, performing ultrasonic treatment for 10-20min under the power of 100-200W, washing 3-5 times with deionized water after ultrasonic treatment, and drying at the temperature of 80-100 ℃ to obtain modified heat conduction filler;
preparation of heat dissipation type charging pile cable
S1, placing 5 parts by mass of modified heat conducting filler, 1 part by mass of di-tert-butyl peroxide, 3.2 parts by mass of white carbon black, 0.8 part by mass of anti-aging agent RD and 15 parts by mass of ethylene propylene diene monomer in a mixing mill, and mixing for 3-8min to obtain an insulating layer 2 raw rubber material for later use;
s2, stranding 6 strands of copper-aluminum alloy wires into a conductor 1 through stranding equipment, wherein the stranding pitch diameter ratio is 15-20, then the conductor 1 moves through cabling equipment, raw rubber material is extruded on the conductor 1 through extrusion equipment, the extrusion thickness of an insulating layer 2 is 5-10mm, whether the coating is complete or not is detected through a spark machine, when the coating is incomplete, the raw rubber material is extruded on the insulating layer 2 through the extrusion machine again, and is vulcanized by hot air through a heating channel again through the spark machine when the coating is complete, the heat dissipation pipe 3 is sleeved on the heat conduction insulating layer 2 through threading equipment at the temperature of 100-120 ℃ for 5-10min after vulcanization, and a partition piece in the heat dissipation pipe 3 is set to be spiral 3-1, so that a power wire core is obtained;
s3, a power wire core passes through the cabling equipment again and is stranded on the power wire core together with the signal wire 4, the control wire 41 and the filling rope 42, then the aluminum-plastic composite belt is spirally wound on the control wire 41 core and the filling rope 42 through the winding equipment, the winding overlapping rate is 20-30%, a shielding layer 5 is formed, then the polyurethane sheath layer 6 is extruded on the aluminum-plastic composite belt through the extrusion equipment, and after cooling, the cable without filling cooling liquid is obtained;
s4, one end of the radiating pipe 3 is used as an open end, a sealing plug is matched in a sealing manner, during sealing, a material which is the same as the radiating pipe 3 is adopted for hot-melting sealing, and a sealing head is adopted for sealing, when the sealing head is used for sealing, only a liquid inlet channel and a liquid outlet channel of the radiating pipe 3 are sealed, a conductor 1 and a control wire 41 core are exposed outside, one channel is communicated with the liquid inlet channel, the other channel is communicated with the liquid outlet channel, so that a radiating type charging pile cable is obtained, and when the radiating type charging pile cable is used, the connector is opened or taken down, and cooling liquid is filled into the radiating pipe 3, so that the complete radiating type charging pile cable is obtained.
Example 2 production Process two of Heat dissipation type charging pile Cable
In this example, the insulating layer 2 was made of the same material as in example 1.
Preparation of insulating layer 2 Material
Ball milling 10 parts by mass of spherical a-alumina and 0.8 part by mass of cubic boron nitride together to 10-20nm, then transferring into a mixer, adding 1.2 parts by mass of aluminate coupling agent, and stirring for 20-30min at 40-60 ℃ to obtain spherical a-alumina and cubic boron nitride with surface treatment; adding 1.8 parts by mass of polyethylene glycol 200 and 10 parts by mass of coarse diatomite and enough water into spherical alpha-alumina and cubic boron nitride, performing ultrasonic treatment for 10-20min under the power of 100-200W, washing 3-5 times with deionized water after ultrasonic treatment, and drying at the temperature of 80-100 ℃ to obtain modified heat conduction filler;
preparation of heat dissipation type charging pile cable
S1, placing 5 parts by mass of modified heat conducting filler, 1 part by mass of di-tert-butyl peroxide, 3.2 parts by mass of white carbon black, 0.8 part by mass of anti-aging agent RD and 15 parts by mass of ethylene propylene diene monomer in a mixing mill, and mixing for 3-8min to obtain an insulating layer 2 raw rubber material for later use;
s2, stranding 6 strands of copper-aluminum alloy wires into a conductor 1 through stranding equipment, wherein the stranding pitch diameter ratio is 15-20, then the conductor 1 moves through cabling equipment, raw rubber material is extruded on the conductor 1 through extrusion equipment, the extrusion thickness of an insulating layer 2 is 5-10mm, whether the coating is complete or not is detected through a spark machine, when the coating is incomplete, the raw rubber material is extruded on the insulating layer 2 through the extrusion machine again, and is vulcanized by hot air through a heating channel again through the spark machine when the coating is complete, the heat dissipation pipe 3 is sleeved on the heat conduction insulating layer 2 through threading equipment at the temperature of 100-120 ℃ for 5-10min after vulcanization, and a separator in the heat dissipation pipe 3 is set to be a straight plate shape 3-2, so that a power wire core is obtained;
s3, one power wire core passes through the cabling equipment again and is stranded on the power wire core together with the signal wire 4, the control wire 41 and the filling rope 42, the aluminum-plastic composite belt is spirally wound on the control wire 41 core and the filling rope 42 through the winding equipment, the winding overlapping rate is 20-30%, a shielding layer 5 is formed, the polyurethane sheath layer 6 is extruded on the aluminum-plastic composite belt through the extrusion molding equipment, and after cooling, the cable not filled with cooling liquid is obtained;
s4, one end of the radiating pipe 3 is used as an open end, a sealing plug is matched in a sealing manner, during sealing, a material which is the same as the radiating pipe 3 is adopted for hot-melting sealing, and a sealing head is adopted for sealing, when the sealing head is used for sealing, only a liquid inlet channel and a liquid outlet channel of the radiating pipe 3 are sealed, a conductor 1 and a control wire 41 core are exposed outside, one channel is communicated with the liquid inlet channel, the other channel is communicated with the liquid outlet channel, so that a radiating type charging pile cable is obtained, and when the radiating type charging pile cable is used, the connector is opened or taken down, and cooling liquid is filled into the radiating pipe 3, so that the complete radiating type charging pile cable is obtained.
Example 3 production Process three of Heat dissipation type charging pile Cable
In this example, the insulating layer 2 was made of the same material as in example 1.
Preparation of insulating layer 2 Material
Ball milling 10 parts by mass of spherical a-alumina and 0.8 part by mass of cubic boron nitride together to 10-20nm, then transferring into a mixer, adding 1.2 parts by mass of aluminate coupling agent, and stirring for 20-30min at 40-60 ℃ to obtain spherical a-alumina and cubic boron nitride with surface treatment; adding 1.8 parts by mass of polyethylene glycol 200 and 10 parts by mass of coarse diatomite and enough water into spherical alpha-alumina and cubic boron nitride, performing ultrasonic treatment for 10-20min under the power of 100-200W, washing 3-5 times with deionized water after ultrasonic treatment, and drying at the temperature of 80-100 ℃ to obtain modified heat conduction filler;
preparation of heat dissipation type charging pile cable
S1, placing 5 parts by mass of modified heat conducting filler, 1 part by mass of di-tert-butyl peroxide, 3.2 parts by mass of white carbon black, 0.8 part by mass of anti-aging agent RD and 15 parts by mass of ethylene propylene diene monomer in a mixing mill, and mixing for 3-8min to obtain an insulating layer 2 raw rubber material for later use;
s2, stranding 6 strands of copper-aluminum alloy wires into a conductor 1 through stranding equipment, wherein the stranding pitch diameter ratio is 15-20, then the conductor 1 moves through cabling equipment, raw rubber material is extruded on the conductor 1 through extrusion equipment, the extrusion thickness of an insulating layer 2 is 5-10mm, whether the coating is complete or not is detected through a spark machine, when the coating is incomplete, the raw rubber material is extruded on the insulating layer 2 through the extrusion machine again, and when the coating is complete, the raw rubber material is vulcanized through a heating channel by hot air through the spark machine again, vulcanization is carried out for 5-10min at 100-120 ℃, after vulcanization, a radiating pipe 3 is sleeved on the heat conducting insulating layer 2 through threading equipment, and a partition piece in the radiating pipe 3 is set to be an arc 3-3, so that a power wire core is obtained;
s3, a power wire core passes through the cabling equipment again and is stranded on the power wire core together with the signal wire 4, the control wire 41 and the filling rope 42, then the aluminum-plastic composite belt is spirally wound on the control wire 41 core and the filling rope 42 through the winding equipment, the winding overlapping rate is 20-30%, a shielding layer 5 is formed, then the polyurethane sheath layer 6 is extruded on the aluminum-plastic composite belt through the extrusion equipment, and after cooling, the cable without filling cooling liquid is obtained;
s4, one end of the radiating pipe 3 is used as an open end, a sealing plug is matched in a sealing manner, during sealing, a material which is the same as the radiating pipe 3 is adopted for hot-melting sealing, and a sealing head is adopted for sealing, when the sealing head is used for sealing, only a liquid inlet channel and a liquid outlet channel of the radiating pipe 3 are sealed, a conductor 1 and a control wire 41 core are exposed outside, one channel is communicated with the liquid inlet channel, the other channel is communicated with the liquid outlet channel, so that a radiating type charging pile cable is obtained, and when the radiating type charging pile cable is used, the connector is opened or taken down, and cooling liquid is filled into the radiating pipe 3, so that the complete radiating type charging pile cable is obtained.
Example 4 production Process IV of Heat dissipation type charging pile Cable
In this example, the material of the insulating layer 2 and the preparation method were the same as in example 1.
Preparation of heat dissipation type charging pile cable
S1, placing 5 parts by mass of modified heat conducting filler, 1 part by mass of di-tert-butyl peroxide, 3.2 parts by mass of white carbon black, 0.8 part by mass of anti-aging agent RD and 15 parts by mass of ethylene propylene diene monomer in a mixing mill, and mixing for 3-8min to obtain an insulating layer 2 raw rubber material for later use;
s2, stranding 6 strands of copper-aluminum alloy wires into a conductor 1 through stranding equipment, wherein the stranding pitch diameter ratio is 15-20, then the conductor 1 moves through cabling equipment, raw rubber material is extruded on the conductor 1 through extrusion equipment, the extrusion thickness of an insulating layer 2 is 5-10mm, whether the coating is complete or not is detected through a spark machine, when the coating is incomplete, the raw rubber material is extruded on the insulating layer 2 through the extrusion machine again, and is vulcanized by hot air through a heating channel again through the spark machine when the coating is complete, the heat dissipation pipe 3 is sleeved on the heat conduction insulating layer 2 through threading equipment at the temperature of 100-120 ℃ for 5-10min after vulcanization, and a partition piece in the heat dissipation pipe 3 is set to be spiral 3-1, so that a power wire core is obtained;
s3, the three power wire cores are stranded on the power wire cores through a cabling device together with the signal wire 4, the control wire 41 and the filling rope 42, then the aluminum-plastic composite belt is spirally wound on the control wire 41 core and the filling rope 42 through a winding device, the winding overlapping rate is 20-30%, a shielding layer 5 is formed, then the polyurethane sheath layer 6 is extruded on the aluminum-plastic composite belt through an extrusion molding device, and after cooling, the cable without filling cooling liquid is obtained;
s4, one end of the radiating pipe 3 is used as an open end, a sealing plug is matched in a sealing manner, during sealing, a material which is the same as the radiating pipe 3 is adopted for hot-melting sealing, and a sealing head is adopted for sealing, when the sealing head is used for sealing, only a liquid inlet channel and a liquid outlet channel of the radiating pipe 3 are sealed, a conductor 1 and a control wire 41 core are exposed outside, one channel is communicated with the liquid inlet channel, the other channel is communicated with the liquid outlet channel, so that a radiating type charging pile cable is obtained, and when the radiating type charging pile cable is used, the connector is opened or taken down, and cooling liquid is filled into the radiating pipe 3, so that the complete radiating type charging pile cable is obtained.
Example 5 (comparative example 1), process five for producing Heat dissipating charging pile Cable
In this embodiment, the materials and the preparation method of the material of the insulating layer 2 are the same as those of embodiment 1, and the preparation process of the cable is basically the same, except that in the preparation process of the cable, only the radiating pipes 3 are adopted, no partition member is adopted in the radiating pipes 3, but 2 radiating pipes 3 are adopted, one radiating pipe 3 is sleeved on the heat conducting insulating layer 2, and the other radiating pipe 3 is stranded or directly arranged along the length direction of the cable to serve as a cooling liquid circulating pipe.
Example 6 (comparative example 2), process six for producing Heat dissipating type charging pile Cable
In this embodiment, the materials and the preparation method of the material of the insulating layer 2 are the same as those of embodiment 1, and the preparation process of the cable is different in that the radiating pipe 3 is not adopted in the preparation process of the cable, the control wire 41 core and the filling rope 42 are directly twisted on the power wire core, the material of the insulating layer 2 is adopted for the sheath layer 6, and the extrusion molding thickness is 10-25mm.
Example 7 (comparative example 3), production process seven of radiating type charging pile cable
In this embodiment, the insulation layer 2 material is prepared without adding modified heat conductive filler, the other raw materials and the preparation method are the same as those in embodiment 1, and the preparation process of the cable is the same as that in embodiment 1.
The insulating layer 2 materials prepared in examples 1 to 4 and example 7 were tested for heat conductivity, elongation at break, insulation resistivity and tensile strength according to the standards of EY insulating materials in GB/T33594-2017 electric cable for electric automobile, and the test results are shown in table 1:
project Example 1 Example 2 Example 3 Example 4 Example 7
Coefficient of thermal conductivity (W/m.k) 5.309 5.627 5.434 5.915 0.286
Tensile Strength (N/mm) 2 ) 9.43 9.45 9.45 9.71 12.78
Elongation at break (%) 358.4 360.2 359.8 358.7 425.6
Insulation resistivity (Ω. M) 4.87*10 16 4.35*10 16 4.54*10 16 4.62*10 16 5.38*10 16
According to the results, the insulating layer 2 material prepared in the embodiments 1-4 has good heat conduction coefficient, and compared with the material without adding the modified heat conduction filler, the material has remarkable heat conduction coefficient improving effect, and the modified heat conduction filler prepared in the application has good heat conduction effect. And also has good insulation resistivity, and meets the resistivity requirement of the insulation layer 2. Although the addition of the modified heat conductive filler results in a decrease in tensile strength and elongation at break, the decreased tensile strength and elongation at break still satisfy the requirements of the insulating layer 2.
The heat dissipation type charging pile cable prepared in examples 1 to 7 and the conventional charging pile cable on the market were tested for rated current capacity and weight, wherein in examples 1 to 5 and example 7, cooling liquid is filled, the cooling liquid is a mixture of water and ethylene glycol, the outer diameter of a single power cable is 20mm, the weight per meter of the conventional multi-core quick charging cable on the market is 3.3-3.5KG, the outer diameter is 50+ -2 mm, the weight per meter of the conventional single-core quick charging cable is 1.6-1.8KG, the outer diameter is 18+ -2 mm, and the test results are shown in table 2:
according to the data, the cable with a single power core prepared by the embodiment of the application is reduced by about 12% compared with the conventional single-core quick-charging cable, and the cable with a plurality of power cores prepared by the embodiment of the application is reduced by about 6.7% compared with the conventional multi-core quick-charging cable, so that the cable prepared by the embodiment of the application is lighter in weight, more convenient to use and beneficial to light weight, and does not adopt modified heat-conducting filler and a radiating pipe 3, so that the weight can be further reduced, but the radiating effect is reduced.
The cables prepared in examples 1 to 7 were further tested for heat dissipation effect, and the test results are shown in fig. 5.
As can be seen from the data in the figures, in examples 1 to 4, the best heat dissipation effect is that in example 1, i.e., the separator is spiral, the temperature of the cable is about 48 ℃ when charging for about 30min, whereas in example 4, the separator is spiral, the temperature of the cable is about 45 ℃ when charging for about 30min, which means that the spiral heat dissipation effect is best, and in comparative examples 1 to 3, 2 heat dissipation pipes 3 are used, the temperature of the cable is about 53 ℃ when charging for about 30min, which means that the single power cable is in direct contact with better heat dissipation effect than 2 separate power cables. And the temperature of the cable is about 55 ℃ when the cable is charged for about 30min without adopting modified heat conduction filler and without adding the radiating pipe 3, which indicates that the radiating of the cable can be obviously accelerated by adopting the radiating pipe 3 and the modified heat conduction filler.
The heat dissipation type charging pile cable and the production process thereof provided by the invention are described in detail. The description of the specific embodiments is only intended to aid in understanding the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
What needs to be specifically stated is: the specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
The above examples are provided for better understanding of the present invention, and are not limited to the preferred embodiments, but are not limited to the content and scope of the present invention, and any product which is the same or similar to the present invention obtained by any person who is in the light of the present invention or combines the present invention with other features of the prior art falls within the scope of the present invention.

Claims (10)

1. The utility model provides a heat dissipation formula fills electric pile cable which characterized in that, includes power sinle silk and cladding at the outer restrictive coating of sinle silk, be provided with the conductor in the power sinle silk, be provided with the heat conduction insulating layer on the conductor, the cooling tube is established to the cover on the heat conduction insulating layer, the cooling tube intussuseption is filled with the coolant liquid, the cooling tube can be used to the coolant liquid at the cooling tube internal circulation flow.
2. The heat dissipation type charging pile cable according to claim 1, wherein the heat dissipation pipe comprises a heat dissipation pipe body and a partition member, the heat dissipation pipe body is coated on the heat conduction insulating layer, the partition member is arranged in the heat dissipation pipe body, and the partition member is used for dividing the heat dissipation pipe body into a liquid inlet channel and a liquid outlet channel.
3. The heat dissipation type charging pile cable according to claim 2, wherein the partition is provided in one of a spiral shape, a straight plate shape, and an arc shape.
4. A heat dissipation type charging pile cable according to claim 1 or 3, wherein the heat conduction insulating layer is made of rubber and modified heat conduction filler.
5. The heat dissipation type charging pile cable according to claim 1, wherein the conductor is one of a stranded copper-aluminum alloy, a stranded copper wire and a stranded aluminum wire.
6. The heat dissipation type charging pile cable according to claim 1 or 5, further comprising a control wire core, a shielding layer and a filler, wherein the control wire core comprises a signal wire and a control wire, the signal wire and the control wire are arranged outside the power wire core, the filler is filled between the signal wire, the control wire and the power wire core, the shielding layer is wrapped on the filler, and the sheath layer is wrapped on the shielding layer.
7. A process for producing a heat dissipation type charging pile cable according to any one of claims 1 to 6, comprising the steps of:
s1, preprocessing, namely mixing the modified heat-conducting filler, the vulcanizing agent, the reinforcing agent, the auxiliary materials and the rubber to obtain an insulating layer material for later use;
s2, twisting the wires into conductors through a wire twisting device, enabling the conductors to move through a cabling device, extruding an insulating layer material on the conductors through an extrusion molding device, enabling the insulating layer material to pass through a spark machine, and sleeving a radiating tube on the insulating layer through a threading device to obtain a power wire core;
s3, one or more power wire cores are passed through a cabling device again, stranded with the control wire cores and the filler on the power wire cores, spirally wrapped on the control wire cores and the filler by a wrapping device, extruded on the shielding layer by an extrusion molding device, and cooled to obtain a cable not filled with cooling liquid;
s4, closing the opening of the radiating pipe at one end of the radiating pipe, and closing the radiating pipe at the other end of the radiating pipe through a joint to obtain the radiating type charging pile cable.
8. The process for producing a heat dissipation type charging pile cable according to claim 7, wherein in the step S1, the preparation method of the modified heat conductive filler is specifically as follows:
ball milling spherical a-alumina and cubic boron nitride to nano shape, transferring into a mixer, adding aluminate coupling agent, stirring for 20-30min at 40-60 ℃ to obtain surface treated inorganic powder; adding polyethylene glycol 200 and diatomite into the inorganic powder, performing ultrasonic treatment for 10-20min, washing after ultrasonic treatment, and drying to obtain the modified heat-conducting filler.
9. The process for producing a heat dissipation type charging pile cable according to claim 7, wherein in the step S3, the shielding layer is an aluminum-plastic composite belt, and the lapping overlapping rate is 20-35%.
10. The process for producing a heat dissipation type charging pile cable according to claim 7 or 8, wherein in the step S4, when the opening end of the heat dissipation tube is sealed, the heat dissipation tube is sealed by a welding fit plug, and when the heat dissipation type charging pile cable is sealed by a joint, the joint has two channels, one channel is communicated with the liquid inlet channel, and the other channel is communicated with the liquid outlet channel.
CN202311259708.4A 2023-09-27 2023-09-27 Heat dissipation type charging pile cable and production process thereof Pending CN117457274A (en)

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CN202311259708.4A CN117457274A (en) 2023-09-27 2023-09-27 Heat dissipation type charging pile cable and production process thereof

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Application Number Priority Date Filing Date Title
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