High-temperature-resistant insulating flame-retardant wire and preparation method thereof

Abstract

The invention relates to the technical field of wire preparation, and discloses a high-temperature-resistant insulating flame-retardant wire and a preparation method thereof.The high-temperature-resistant insulating flame-retardant wire comprises a conductor, an insulating layer, a flame-retardant composite layer and a protective layer are sequentially arranged on the outer side of the conductor, the conductor is coated with the insulating layer, the flame-retardant composite layer comprises at least one flame-retardant high-temperature-resistant layer, the insulating layer is coated with the flame-retardant high-temperature-resistant layer, and the protective layer is coated with the flame-retardant high- The protective layer wraps the outer side of the flame-retardant high-temperature-resistant layer. Conductors of different types are processed in an extrusion forming mode, the outer side of the electroplated or non-electroplated conductor is coated with an insulating layer, the outer side of the insulating layer is wound or woven with a flame-retardant composite layer, the outer side of the flame-retardant composite layer is coated with a protective layer, and the high-temperature-resistant insulating flame-retardant wire is obtained. And detecting the prepared high-temperature-resistant insulating flame-retardant wire. According to the high-temperature-resistant insulating flame-retardant wire, the insulating layer, the flame-retardant composite layer and the protective layer sequentially wrap the outer side of the conductor to protect the wire, and the preparation method is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of wire preparation, in particular to a high temperature resistant insulated flame retardant wire and a preparation method thereof. Background Art

[0002] With the rapid development of new energy vehicles and energy storage industries, the flame retardancy requirements for connecting wires in new energy batteries are becoming increasingly higher.

[0003] In the prior art, the name disclosed in the application number: CN201621190410.8 is: a fire-resistant, high-temperature resistant and flame-retardant wire, wherein the conductor of the round core wire is coated with a first insulating layer, the first insulating layer is coated with a thermal insulation layer, the thermal insulation layer is coated with a second insulating layer, the second insulating layer is coated with a temperature-resistant layer, the first insulating layer is one or more layers of glass fiber layer, the thermal insulation layer is a mica tape wrapping layer, the second insulating layer is a silicone resin layer, the temperature-resistant layer is two layers of tetrafluoro liquid coating, and the core wire is a copper wire or a copper wire with a nickel-plated layer on the surface.

[0004] However, in the prior art, such as the fire-resistant, high-temperature-resistant, flame-retardant wire mentioned in the application number: CN201621190410.8, the core wire is a round conductor, so the outer layer covered on the core wire is round, the power output and the slot fill rate are not high, and the product has a bulky appearance and cannot be lightweight; therefore, it is necessary to design a high-temperature-resistant insulated flame-retardant wire. Summary of the invention

[0005] The object of the present invention is to provide a high temperature resistant insulated flame retardant wire and a preparation method thereof, so as to solve the problems in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A high-temperature resistant insulated flame-retardant wire comprises a conductor, wherein an insulating layer, a flame-retardant composite layer and a protective layer are sequentially arranged on the outside of the conductor, the insulating layer is coated on the conductor, the flame-retardant composite layer comprises at least one flame-retardant and high-temperature resistant layer, the flame-retardant and high-temperature resistant layer is coated on the outside of the insulating layer for improving the flame-retardant and high-temperature resistance of the wire, and the protective layer is coated on the outside of the flame-retardant and high-temperature resistant layer.

[0008] Furthermore, the flame retardant and high temperature resistant layer includes a first flame retardant layer and a second flame retardant layer, and the first flame retardant layer is coated on the outside of the insulating layer, the second flame retardant layer is coated on the outside of the first flame retardant layer, and the flame retardant composite layer is coated on the outside of the insulating layer by weaving or winding, and the thickness of each flame retardant composite layer is 0.04mm~1.0mm.

[0009] Furthermore, the conductor is made of one or more conductive materials such as copper and aluminum, the thickness of the conductor is 0.5 mm to 10 mm, the width is 1 mm to 50 mm, and the width tolerance of the conductor is ±0.05 mm to ±0.2 mm.

[0010] Furthermore, the materials of the insulating layer and the protective layer include silicone rubber, thermoplastic elastomer materials, and polymer materials.

[0011] Furthermore, the material of the flame retardant composite layer includes glass fiber, carbon fiber, basalt fiber, quartz wool, high silica or other high temperature flame retardant fiber materials and high temperature resistant polymer insulating film tape. The flame retardant composite layer includes at least one layer of fiber tape for preventing the conductor from being bent and damaged. The thickness of the fiber tape can be 0.04mm~0.2mm and the width is 5mm~40mm.

[0012] Furthermore, the number of the protective layers is at least one, and the thickness of each protective layer is 0.2 mm to 1.0 mm.

[0013] Furthermore, the material of the fiber tape is one of glass fiber tape, carbon fiber tape, basalt fiber tape, quartz wool tape, high silica tape or other high-temperature flame-retardant fiber tape materials and high-temperature resistant polymer insulating film tape. The high-temperature resistant fiber tape is wrapped on the insulating layer in a single-head winding or weaving manner, and the winding and weaving speed is 5 to 20 m / min.

[0014] Furthermore, the silicone rubber and thermoplastic elastomer materials include TPEE, POE, POM, POK, TPR, SEBS, SBS, TPU, TPE, porcelain silicone, ceramic silicone rubber, silicone, and rubber.

[0015] The polymer materials include PA6, PA66, PA11, PA12, PPS, PPSU, PBT, PET, PEEK, PVC, XLPE, ETFE, PFA, PTFE, FEP, and PEKK.

[0016] Furthermore, the wire includes an electroplated layer electroplated on the conductor, the material of the electroplated layer is nickel, tin, silver or copper, and the thickness of the electroplated layer can be 2um to 15um.

[0017] A method for preparing a high temperature resistant insulated flame retardant wire, the method comprising the following steps:

[0018] Step 1: Select the materials for the conductor, insulation layer, flame retardant composite layer and protective layer.

[0019] Step 2: Conductors of different linear shapes are processed by extrusion molding, and an insulating layer is coated on the outside of the electroplated or unplated conductor, and a flame-retardant composite layer is wound or woven on the outside of the insulating layer, and a protective layer is coated on the outside of the flame-retardant composite layer to obtain a high-temperature insulated flame-retardant wire.

[0020] Step 3: testing the prepared high temperature insulated flame retardant wire.

[0021] Beneficial effects of the present invention:

[0022] 1. The high temperature resistant insulated flame retardant wire of the present invention can adopt a conductor with high power output and slot fill rate, and the wire has a lightweight appearance. The wire is protected by sequentially coating an insulating layer, a flame retardant composite layer and a protective layer on the outside of the conductor. The insulating layer adopts silicone rubber, thermoplastic elastomer or other polymer materials to ensure the insulation effect of the outside of the conductor, and fits the conductor without affecting the bending and use of the conductor. The flame retardant composite layer is then used for protection, and finally a moisture-proof, insulating and temperature-resistant flame retardant outermost protective layer is provided to excellently coat the wire, so as to meet the use of battery connectors and brushless motors in extreme environments;

[0023] 2. The preparation method of the high temperature resistant insulated flame retardant wire of the present invention coats the wire three times, the production process is simple and convenient, and the production efficiency is high. In the actual production application process, the production cost is reduced, the output is increased, the lightweight and high power output of the terminal product are met, and the prepared wire has an excellent flame retardant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of the flat wire of the present invention;

[0026] Figure 2 It is a schematic diagram of the high temperature test structure of the flat wire extreme bending of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] A high temperature resistant insulated flame retardant wire, such as Figure 1As shown, the high-temperature insulated flame-retardant wire includes a conductor 10, and the outer side of the conductor 10 is provided with an insulating layer 20, a flame-retardant composite layer 30 and a protective layer 40 in sequence, the insulating layer 20 is coated on the conductor 10 used for conduction, and the flame-retardant composite layer 30 is fixedly arranged between the insulating layer 20 and the protective layer 40.

[0030] Among them, the flame retardant composite layer 30 is a high-temperature flame retardant material, which is coated on the outside of the insulating layer 20 by weaving or winding. The thickness of each flame retardant composite layer 30 is 0.04 mm. The protective layer 40 is located in the insulating flame retardant material and is coated on the outside of the flame retardant composite layer 30.

[0031] In this embodiment, the material of the conductor 10 is a metal conductive material, wherein the material of the conductor 10 in this embodiment is one of the conductive materials such as copper and aluminum. The conductor 10 can also be made of a combination of two or more conductive materials. The width of the conductor 10 is 1 mm and the thickness is 0.5 mm. According to the wire diameter of the conductor, the width tolerance of the conductor 10 can be ±0.05 mm to ±0.2 mm.

[0032] The insulating layer 20 is made of silicone rubber, thermoplastic elastomer or other polymer materials, and has high temperature flame retardant insulation effect.

[0033] In this embodiment, the flame retardant composite layer 30 includes a first flame retardant layer 31, and the material of the first flame retardant layer 31 is glass fiber, carbon fiber, basalt fiber, quartz wool, high silica or other high temperature flame retardant fiber materials and high temperature resistant polymer insulation film tape, which has a high temperature flame retardant effect.

[0034] The first flame retardant layer 31 is wound or woven on the insulating layer 20, and the flame retardant composite layer 30 has strong high temperature resistance and flame retardancy. When the motor or battery is in extreme working conditions, the flame retardant composite layer 30 can protect the insulating layer 20, ensure the normal insulation of the insulating layer 20 to avoid failure of the insulation performance of the wire, enhance the high temperature resistance and insulation performance, play a safety protection role for the motor or battery, and effectively prevent the loss of insulation performance causing circuit short circuit and cause safety accidents.

[0035] The material of the protective layer 40 is silicone rubber, thermoplastic elastomer or one of other polymer materials. The protective layer 40 is coated on the first flame retardant layer 31. The number of protective layers 40 is at least one layer, and the thickness of each protective layer 40 is 0.2 mm. The protective layer 40 has a high-temperature flame retardant insulation effect.

[0036] The outermost protective layer 40 can provide moisture-proof, scratch-resistant, flame-retardant, heat-resistant and insulating properties, meeting the terminal product's requirements for conductivity, insulation, flame-retardancy, heat resistance and moisture-proof.

[0037] In order to further improve the high temperature resistance and flame retardancy of the wire, Figure 1 In this embodiment, the flame retardant composite layer 30 includes at least one layer of high temperature resistant fiber tape, and the thickness of the fiber tape may be 0.04 mm and the width may be 5 mm.

[0038] The material of the fiber tape is one of glass fiber tape, carbon fiber tape, basalt fiber tape, quartz wool tape, high silica tape or other high temperature flame retardant fiber tape and high temperature resistant polymer insulation film tape.

[0039] The fiber tape is processed by single-head winding or weaving. The fiber tape is wrapped on the insulating layer 20 by winding or weaving. The winding or weaving speed is 5m / min, so that the processed semi-finished product meets the quality requirements for use.

[0040] By taking advantage of the high temperature resistance, high flame retardancy and high sliding properties of the high temperature resistant fiber belt, the insulating layer 20 is effectively covered and protected. When the metal conductor 10 undergoes 3D bending, the fiber belt can effectively disperse the stress surface of the high temperature insulating flame retardant layer 20 by virtue of its own sliding, thereby reducing stress and extrusion damage. At the same time, the fiber belt can also stretch without breaking after sliding, thereby ensuring the heat resistance, flame retardancy and insulation properties in the later high temperature environment.

[0041] In this embodiment, the silicone rubber and thermoplastic elastomer materials include thermoplastic polyester elastomer TPEE, polyethylene octene co-elastomer POE, polyoxymethylene resin POM, polyketone POK, thermoplastic rubber material TPR, tri-embedded copolymer material SEBS, styrene-based thermoplastic elastomer SBS, polyurethane TPU, thermoplastic rubber material TPE and porcelain silicone, ceramic silicone rubber, silicone, and rubber.

[0042] In this embodiment, the polymer material includes nylon 6PA6, nylon 66PA66, nylon 11PA11, nylon 12PA12, polyphenylene sulfide PPS, polyphenylene sulfone resin PPSU, polybutylene terephthalate PBT, polyethylene terephthalate PET, polyetheretherketone PEEK, polyvinyl chloride PVC, cross-linked polyethylene XLPE, ethylene-tetrafluoroethylene copolymer ETFE, polytetrafluoroethylene-fluorinated propylene copolymer PFA, polytetrafluoroethylene PTFE, perfluoroethylene propylene copolymer FEP, and polyaryletherketone PEKK.

[0043] To improve the anti-oxidation performance of the conductor 10 and the conductivity of the conductor 10, the wire can also be electroplated, and the electroplating layer is on the conductor 10. The material of the electroplating layer is nickel, tin, silver or copper, and the thickness of the electroplating layer can be 2um-15um.

[0044] Example 2

[0045] A high temperature resistant insulated flame retardant wire, such as Figure 1As shown, the high-temperature insulated flame-retardant wire includes a conductor 10, and the outer side of the conductor 10 is provided with an insulating layer 20, a flame-retardant composite layer 30 and a protective layer 40 in sequence, the insulating layer 20 is coated on the conductor 10 used for conduction, and the flame-retardant composite layer 30 is fixedly arranged between the insulating layer 20 and the protective layer 40.

[0046] Among them, the flame retardant composite layer 30 is made of high-temperature flame retardant material, and is coated on the outside of the insulating layer 20 by weaving or winding. The thickness of each flame retardant composite layer 30 is 0.1 mm. The protective layer 40 is made of insulating flame retardant material and is coated on the outside of the flame retardant composite layer 30.

[0047] In this embodiment, the material of the conductor 10 is a metal conductive material, wherein the material of the conductor 10 in this embodiment is one of conductive materials such as copper and aluminum. The conductor 10 can also be made of a combination of two or more conductive materials. The width of the conductor 10 is 25 mm and the thickness is 5 mm. According to the wire diameter of the conductor, the width tolerance of the conductor 10 can be ±0.05 mm to ±0.2 mm.

[0048] The insulating layer 20 is made of silicone rubber, thermoplastic elastomer or other polymer materials, and has high temperature flame retardant insulation effect.

[0049] In this embodiment, the flame retardant composite layer 30 includes a second flame retardant layer 32, and the material of the second flame retardant layer 32 is glass fiber, carbon fiber, basalt fiber, quartz wool, high silica or other high temperature flame retardant fiber materials and high temperature resistant polymer insulation film tape, which has a high temperature flame retardant effect.

[0050] The second flame retardant layer 32 is wound or woven on the insulating layer 20, and the flame retardant composite layer 30 has strong high temperature resistance and flame retardancy. When the motor or battery is in extreme conditions during operation, the flame retardant composite layer 30 can protect the insulating layer 20, ensure the normal insulation of the insulating layer 20 to avoid failure of the insulation performance of the wire, enhance the high temperature resistance and insulation performance, play a safety protection role for the motor or battery, and effectively prevent the loss of insulation performance causing circuit short circuit and causing safety accidents.

[0051] The material of the protective layer 40 is silicone rubber, thermoplastic elastomer or one of other polymer materials. The protective layer 40 is coated on the second flame retardant layer 32. The number of protective layers 40 is at least one layer, and the thickness of each protective layer 40 is 0.3 mm. The protective layer 40 has a high-temperature flame retardant insulation effect.

[0052] The outermost protective layer 40 can provide moisture-proof, scratch-resistant, flame-retardant, heat-resistant and insulating properties, meeting the terminal product's requirements for conductivity, insulation, flame-retardancy, heat resistance and moisture-proof.

[0053] In order to further improve the high temperature resistance and flame retardancy of the wire, Figure 1 In this embodiment, the flame retardant composite layer 30 includes at least one layer of high temperature resistant fiber tape, and the thickness of the fiber tape may be 0.1 mm and the width may be 20 mm.

[0054] The material of the fiber tape is one of glass fiber tape, carbon fiber tape, basalt fiber tape, quartz wool tape, high silica tape or other high temperature flame retardant fiber tape and high temperature resistant polymer insulation film tape.

[0055] The fiber tape is processed by single-head winding or weaving. The fiber tape is wound or weaved on the insulating layer 20 at a winding or weaving speed of 10 m / min, so that the processed semi-finished product meets the quality requirements for use.

[0056] By taking advantage of the high temperature resistance, high flame retardancy and high sliding properties of the high temperature resistant fiber belt, the insulating layer 20 is effectively covered and protected. When the metal conductor 10 undergoes 3D bending, the fiber belt can effectively disperse the stress surface of the high temperature insulating flame retardant layer 20 by virtue of its own sliding, thereby reducing stress and extrusion damage. At the same time, the fiber belt can also stretch without breaking after sliding, thereby ensuring the heat resistance, flame retardancy and insulation properties in the later high temperature environment.

[0057] In this embodiment, the silicone rubber and thermoplastic elastomer materials include thermoplastic polyester elastomer TPEE, polyethylene octene co-elastomer POE, polyoxymethylene resin POM, polyketone POK, thermoplastic rubber material TPR, tri-embedded copolymer material SEBS, styrene-based thermoplastic elastomer SBS, polyurethane TPU, thermoplastic rubber material TPE and porcelain silicone, ceramic silicone rubber, silicone, and rubber.

[0058] In this embodiment, the polymer material includes nylon 6PA6, nylon 66PA66, nylon 11PA11, nylon 12PA12, polyphenylene sulfide PPS, polyphenylene sulfone resin PPSU, polybutylene terephthalate PBT, polyethylene terephthalate PET, polyetheretherketone PEEK, polyvinyl chloride PVC, cross-linked polyethylene XLPE, ethylene-tetrafluoroethylene copolymer ETFE, polytetrafluoroethylene-fluorinated propylene copolymer PFA, polytetrafluoroethylene PTFE, perfluoroethylene propylene copolymer FEP, and polyaryletherketone PEKK.

[0059] The conductor 10 has an anti-oxidation property and a conductive property. The conductor 10 also includes an electroplated layer electroplated on the conductor 10. The material of the electroplated layer is nickel, tin, silver or copper, etc. The thickness of the electroplated layer can be 8 um.

[0060] Example 3

[0061] A high temperature resistant insulated flame retardant wire, such as Figure 1As shown, the high-temperature insulated flame-retardant wire includes a conductor 10, and the outer side of the conductor 10 is provided with an insulating layer 20, a flame-retardant composite layer 30 and a protective layer 40 in sequence, the insulating layer 20 is coated on the conductor 10 used for conduction, and the flame-retardant composite layer 30 is fixedly arranged between the insulating layer 20 and the protective layer 40.

[0062] Among them, the flame retardant composite layer 30 is a high-temperature flame retardant material, which is coated on the outside of the insulating layer 20 by weaving or winding. The thickness of each flame retardant composite layer 30 is 1.0 mm. The protective layer 40 is located in the insulating flame retardant material and is coated on the outside of the flame retardant composite layer 30.

[0063] In this embodiment, the material of the conductor 10 is a metal conductive material, wherein the material of the conductor 10 in this embodiment is one of conductive materials such as copper and aluminum. The conductor 10 can also be made of a combination of two or more conductive materials. The width of the conductor 10 is 50 mm and the thickness is 10 mm. According to the wire diameter of the conductor, the width tolerance of the conductor 10 can be ±0.05 mm to ±0.2 mm.

[0064] The insulating layer 20 is made of silicone rubber, thermoplastic elastomer or other polymer materials, and has high temperature flame retardant insulation effect.

[0065] In this embodiment, the flame retardant composite layer 30 includes a first flame retardant layer 31 and a second flame retardant layer 32, and the materials of the two layers are glass fiber, carbon fiber, basalt fiber, quartz wool, high silica or other high temperature flame retardant fiber materials and high temperature resistant polymer insulation film tape, which has a high temperature flame retardant effect.

[0066] The first flame retardant layer 31 is wound or woven on the insulating layer 20, and the second flame retardant layer 32 is wound or woven on the first flame retardant layer 31. The flame retardant composite layer 30 has strong high temperature resistance and flame retardancy. When the motor or battery is in extreme conditions at work, the flame retardant composite layer 30 can protect the insulating layer 20, ensure the normal insulation of the insulating layer 20 to avoid failure of the insulation performance of the wire, enhance the high temperature resistance and insulation performance, play a safety protection role for the motor or battery, and effectively prevent the loss of insulation performance causing circuit short circuit and cause safety accidents.

[0067] The material of the protective layer 40 is silicone rubber, thermoplastic elastomer or one of other polymer materials. The protective layer 40 is coated on the second flame retardant layer 32. The number of protective layers 40 is at least one layer, and the thickness of each protective layer 40 is 1.0 mm. The protective layer 40 has a high-temperature flame retardant insulation effect.

[0068] The outermost protective layer 40 can provide moisture-proof, scratch-resistant, flame-retardant, heat-resistant and insulating properties, meeting the terminal product's requirements for conductivity, insulation, flame-retardancy, heat resistance and moisture-proof.

[0069] In order to further improve the high temperature resistance and flame retardancy of the wire, Figure 1 In this embodiment, the flame retardant composite layer 30 includes at least one layer of high temperature resistant fiber tape, and the thickness of the fiber tape may be 0.2 mm and the width may be 40 mm.

[0070] The material of the fiber tape is one of glass fiber tape, carbon fiber tape, basalt fiber tape, quartz wool tape, high silica tape or other high temperature flame retardant fiber tape and high temperature resistant polymer insulation film tape.

[0071] The fiber tape is processed by single-head winding or weaving. The fiber tape is wrapped on the insulating layer 20 by winding or weaving. The winding and weaving speed is 20m / min, so that the processed semi-finished product meets the quality requirements for use.

[0072] By taking advantage of the high temperature resistance, high flame retardancy and high sliding properties of the high temperature resistant fiber belt, the insulating layer 20 is effectively covered and protected. When the metal conductor 10 undergoes 3D bending, the fiber belt can effectively disperse the stress surface of the high temperature insulating flame retardant layer 20 by virtue of its own sliding, thereby reducing stress and extrusion damage. At the same time, the fiber belt can also stretch without breaking after sliding, thereby ensuring the heat resistance, flame retardancy and insulation properties in the later high temperature environment.

[0073] In this embodiment, the silicone rubber and thermoplastic elastomer materials include thermoplastic polyester elastomer TPEE, polyethylene octene co-elastomer POE, polyoxymethylene resin POM, polyketone POK, thermoplastic rubber material TPR, tri-embedded copolymer material SEBS, styrene-based thermoplastic elastomer SBS, polyurethane TPU, thermoplastic rubber material TPE and porcelain silicone, ceramic silicone rubber, silicone, and rubber.

[0074] In this embodiment, the polymer material includes nylon 6PA6, nylon 66PA66, nylon 11PA11, nylon 12PA12, polyphenylene sulfide PPS, polyphenylene sulfone resin PPSU, polybutylene terephthalate PBT, polyethylene terephthalate PET, polyetheretherketone PEEK, polyvinyl chloride PVC, cross-linked polyethylene XLPE, ethylene-tetrafluoroethylene copolymer ETFE, polytetrafluoroethylene-fluorinated propylene copolymer PFA, polytetrafluoroethylene PTFE, perfluoroethylene propylene copolymer FEP, and polyaryletherketone PEKK.

[0075] To improve the anti-oxidation performance of the conductor 10 and the conductivity of the conductor 10, the wire can also be electroplated, and the electroplating layer is on the conductor 10. The material of the electroplating layer is nickel, tin, silver or copper, etc., and the thickness of the electroplating layer can be 15um.

[0076] A method for preparing a high temperature resistant insulated flame retardant wire comprises the following steps:

[0077] Step 1: Select materials for the conductor 10 , the insulating layer 20 , the flame retardant composite layer 30 and the protective layer 40 .

[0078] Step 2: Conductors 10 of different linear shapes are processed by extrusion molding, and an insulating layer 20 is coated on the outside of the electroplated or unplated conductor 10, and then a flame retardant composite layer 30 is wrapped or woven on the outside of the insulating layer 20, and a protective layer 40 is coated on the outside of the flame retardant composite layer 30 to obtain a high-temperature insulated flame retardant wire.

[0079] Step 3: testing the prepared high temperature insulated flame retardant wire.

[0080] Among them, in step 2, the linear cross-sectional shape of the conductor 10 includes round, rectangular, special-shaped, and flat, and by selecting copper rod or aluminum rod materials, a cold rolling machine, an extruder, and a drawing machine are used for extrusion molding. In order to meet the oxidation resistance and conductivity of the conductor 10, an anti-oxidation layer can also be electroplated on the outside of the conductor 10 through electroplating wire.

[0081] The insulating layer 20 and the protective layer 40 are processed by cold extrusion and hot molding, and are coated with a single layer or multiple layers. If hot molding is used, the hot pressing pressure is 5KN~30KN and the pressure is maintained for 5min~10min, and the hot pressing temperature is 100℃~300℃, so that the processed finished product meets the quality requirements for use.

[0082] The composite layer 30 is wrapped or braided to form a single-layer or multi-layer structure.

[0083] The wire prepared by the method is suitable for use in automotive power, energy storage batteries and hairpin wires, and is a high-temperature resistant, insulated and flame-retardant wire.

[0084] In this embodiment, in step four, a flat conductor 10, an insulating layer 20, a flame retardant composite layer 30 and a protective layer 40 are selected. The material of the insulating layer 20 is porcelain silicone, the material of the first flame retardant layer 31 is glass fiber tape, the material of the second flame retardant layer 32 is glass fiber tape, and the material of the protective layer 40 is high temperature resistant silicone.

[0085] The structure of the comparison sample is a flat conductor, a layer of PE synthetic phlogopite tape, two layers of polyimide synthetic phlogopite tape, and a layer of polymer material.

[0086] In summary, the product data was confirmed before the test, and 100 PCS samples were prepared. The conductor was a flat specification of 22*2.5, and 16 PCS were randomly selected to measure the conductor thickness. The measuring tool used was a thousandth caliper. The specific measurement data is as follows in Table 1:

[0087]

[0088] like Figure 2As shown in the figure, the universal bending test of flat wires, the bending angles of 120 sample wires are tested: vertical bending 90°, the bending R angle is equal to the width of the flat wire; horizontal bending 90°, the bending R angle is equal to the thickness of the flat wire. The test method adopts 3 extreme withstand voltage test conditions after high temperature, and 30 PCS are tested for withstand voltage verification under each condition.

[0089] 1. Take 30 PCS bent parts and bake them at 350℃ for 1H, then power on them in the oven for dynamic testing or take them out for testing. The withstand voltage test starts from 1KV / 60S and the leakage current is required to be less than 60mA. After the test passes, the pressure is increased by 0.5KV, and so on until breakdown.

[0090] 2. Take 30 PCS bent parts and bake them at 400℃ for 1H, then power on them in the oven for dynamic testing or take them out for testing. The withstand voltage test starts from 1KV / 60S and the leakage current is required to be less than 60mA. After the test passes, increase the voltage by 0.5KV, and so on until breakdown.

[0091] 3. Take 30 PCS bent parts and bake them at 450℃ for 1H, then power on them in the oven for dynamic testing or take them out for testing. The withstand voltage test starts from 1KV / 60S and the leakage current is required to be less than 60mA. After the test passes, increase the voltage by 0.5KV, and so on until breakdown.

[0092] 4. Take 30 PCS bent parts for room temperature test, test conditions 4000V, leakage current <1mA, water pressure resistance or steel ball pressure resistance (steel ball diameter <4mm).

[0093] The specific test results are shown in Table 2:

[0094]

[0095] In summary, the insulation layer thickness test shows that the insulation layer of the invention sample is less than 0.25mm in width on average, and less than 0.2mm in thickness on average compared with the comparison sample, achieving the advantages of lightweight, compact, small size, and resource saving. At the same time, the high temperature point test shows that when the high temperature is 350°C, the withstand voltage test can pass all 5KV of the invention sample line while ensuring that the leakage current is less than 60mA, while the comparison sample can only pass all 4.5KV tests; when the high temperature rises to 400°C, the withstand voltage test can pass all 4.0KV of the invention sample line while ensuring that the leakage current is less than 60mA, while the comparison sample can only pass all 2.0KV tests; when the high temperature rises to 450°C, the withstand voltage test can pass all 3.5KV of the invention sample line while ensuring that the leakage current is less than 60mA, while the comparison sample can only pass all 1.0KV tests; it shows that the high temperature resistance and insulation performance of the invention sample are much higher than those of the comparison sample, which is mainly because the higher the temperature of the high temperature insulating flame retardant layer 20, the greater the porcelain saturation, and the more it can resist the impact and damage of high temperature and high pressure.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0097] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A high temperature resistant insulated flame retardant wire, comprising a conductor (10), characterized in that: The outer side of the conductor (10) is provided with an insulating layer (20), a flame retardant composite layer (30) and a protective layer (40) in sequence; the insulating layer (20) is coated on the conductor (10); the flame retardant composite layer (30) includes at least one flame retardant and high temperature resistant layer; the flame retardant and high temperature resistant layer is coated on the outer side of the insulating layer (20) and is used to improve the flame retardancy and high temperature resistance of the conductor; and the protective layer (40) is coated on the outer side of the flame retardant and high temperature resistant layer.

2. A high temperature resistant insulated flame retardant wire according to claim 1, characterized in that: The flame retardant and high temperature resistant layer comprises a first flame retardant layer (31) and a second flame retardant layer (32), wherein the first flame retardant layer (31) is coated on the outside of the insulating layer (20), and the second flame retardant layer (32) is coated on the outside of the first flame retardant layer (31); the flame retardant composite layer (30) is coated on the outside of the insulating layer (20) by weaving or winding, and the thickness of each flame retardant composite layer (30) is 0.04 mm to 1.0 mm.

3. The high temperature resistant insulated flame retardant wire according to claim 1, characterized in that: The conductor (10) is made of one or more conductive materials such as copper and aluminum. The thickness of the conductor (10) is 0.5 mm to 10 mm, the width is 1 mm to 50 mm, and the width tolerance of the conductor (10) is ±0.05 mm to ±0.2 mm.

4. The high temperature resistant insulated flame retardant wire according to claim 1, characterized in that: The materials of the insulating layer (20) and the protective layer (40) include silicone rubber, thermoplastic elastomer materials, and polymer materials.

5. The high temperature resistant insulated flame retardant wire according to claim 1, characterized in that: The material of the flame retardant composite layer (30) includes glass fiber, carbon fiber, basalt fiber, quartz wool, high silica or other high temperature flame retardant fiber materials and high temperature resistant polymer insulating film tape. The flame retardant composite layer (30) includes at least one layer of fiber tape for preventing the conductor (10) from being bent and damaged. The thickness of the fiber tape can be 0.04 mm to 0.2 mm, and the width is 5 mm to 40 mm.

6. A high temperature resistant insulated flame retardant wire according to claim 4, characterized in that: The number of the protective layer (40) is at least one, and the thickness of each protective layer (40) is 0.2 mm to 1.0 mm.

7. The high temperature resistant insulated flame retardant wire according to claim 5, characterized in that: The fiber tape is made of glass fiber tape, carbon fiber tape, basalt fiber tape, quartz wool tape, high silica tape or other high temperature flame retardant fiber tape materials and high temperature resistant polymer insulating film tape. The high temperature resistant fiber tape is wrapped on the insulating layer (20) by single-head winding or weaving, and the winding and weaving speed is 5 to 20 m / min.

8. The high temperature resistant insulated flame retardant wire according to claim 4, characterized in that: The silicone rubber and thermoplastic elastomer materials include TPEE, POE, POM, POK, TPR, SEBS, SBS, TPU, TPE, porcelain silicone, ceramic silicone rubber, silicone, and rubber; The polymer materials include PA6, PA66, PA11, PA12, PPS, PPSU, PBT, PET, PEEK, PVC, XLPE, ETFE, PFA, PTFE, FEP, and PEKK.

9. The high temperature resistant insulated flame retardant wire according to claim 1, characterized in that: The wire comprises an electroplated layer electroplated on a conductor (10); the material of the electroplated layer is nickel, tin, silver or copper; and the thickness of the electroplated layer can be 2um to 15um.

10. A method for preparing a high temperature resistant insulated flame retardant wire according to any one of claims 1 to 9, characterized in that: The preparation method comprises the following steps: Step 1: selecting materials for the conductor (10), the insulating layer (20), the flame retardant composite layer (30) and the protective layer (40); Step 2: Processing conductors (10) of different linear shapes by extrusion molding, and coating the outside of the electroplated or unplated conductor (10) to form an insulating layer (20), and the outside of the insulating layer (20) is wound or woven with a flame-retardant composite layer (30), and the outside of the flame-retardant composite layer (30) is coated to form a protective layer (40), so as to obtain a high-temperature insulated flame-retardant wire; Step 3: testing the prepared high temperature insulated flame retardant wire.

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