Weather-proof new energy automobile charging cable

Abstract

The invention belongs to the technical field of cables, and particularly relates to a weather-proof new energy automobile charging cable which is composed of a cable core, a shielding layer wrapping the cable core and a sheath layer wrapping the shielding layer. Each cable core is composed of a conductor and an insulating layer. The invention discloses a preparation method of a traditional Chinese medicine. A sheath layer of the weather-resistant new energy automobile charging cable is prepared from 70 to 90 parts of thermoplastic elastomer (TPE), 20 to 30 parts of lignin, 25 to 30 parts of propylene oxide, 20 to 25 parts of furfuryl alcohol, 2 to 5 parts of 4-chloromethyl styrene, 1.5 to 3 parts of tetrabutyl ammonium hydroxide, 5 to 6 parts of methylbenzene, 10 to 25 parts of methyl tert-butyl ether, 45 to 7 parts of anhydrous MgSO4, 0.5 to 2.5 parts of initiator, 2 to 3 parts of cross-linking agent, 5 to 8 parts of metal salt additive and 1 to 3 parts of lubricant. 0.3 to 0.6 part of antioxidant and 3 to 4 parts of color master batch.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and in particular relates to a weather-resistant new energy vehicle charging cable. Background Art

[0002] With the rapid development of the global new energy vehicle (EV) market, the demand for charging infrastructure has also shown a significant growth trend. As a core component in electric vehicle charging systems, charging cables not only have to cope with the extreme challenges of high current and high temperature environments generated by rapid charging or high-load operation during the charging process, but also have to withstand the strong effects of long-term exposure to outdoor ultraviolet radiation. Currently, the vast majority of charging cables on the market are mainly made of traditional plastic and rubber materials. Although these materials perform well in initial use, they are prone to thermal aging, surface embrittlement, and cracking when exposed to high temperatures, ultraviolet radiation, and harsh weather conditions for a long time. This not only significantly reduces the electrical insulation performance of the cables, but in severe cases, it may also cause safety hazards such as short circuits and fires, posing a serious threat to the charging safety of new energy vehicles and the safety of users' lives and property.

[0003] Traditional charging cables are mostly made of PVC resin, which typically has a maximum operating temperature of only 105°C. During the charging process of new energy vehicles, the high current flowing through the cables generates a significant amount of heat, causing the temperature to rise. This high temperature environment causes the cables to age rapidly, reducing their service life, while also increasing resistance and affecting charging efficiency. PVC also becomes brittle at low temperatures, while silicone rubber, while cold-resistant, is not oil-resistant and has poor tear resistance. This makes traditional charging cables difficult to use in harsh climates, including high and low temperatures, humidity, and salt spray environments.

[0004] In addition, the thermoplastic elastomer materials (such as TPE) used in charging cables have poor stability under ultraviolet radiation. When exposed to the outdoors for a long time, their mechanical properties will be significantly reduced, and the risk of cracking is high, which may even cause the electrical performance of the insulation layer to fail. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a weather-resistant new energy vehicle charging cable. By modifying the sheath material, the charging cable can effectively improve its resistance to high temperature, ultraviolet radiation and erosion under harsh climatic conditions, ensuring the long-term stability and electrical insulation performance of the cable, and providing users with a safer, more efficient and reliable charging experience.

[0006] The technical solution of the present invention is:

[0007] A weather-resistant new energy vehicle charging cable, comprising a cable core, a shielding layer wrapped around the cable core, and a sheath layer wrapped around the shielding layer; the cable core is composed of a conductor and an insulation layer; the sheath layer of the weather-resistant new energy vehicle charging cable comprises the following components, in parts by weight: 70-90 parts of thermoplastic elastomer (TPE), 20-30 parts of lignin, 25-30 parts of propylene oxide, 20-25 parts of furfuryl alcohol, 2-5 parts of 4-chloromethylstyrene, 1.5-3 parts of tetrabutylammonium hydroxide, 5-6 parts of toluene, 10-25 parts of methyl tert-butyl ether, 5-7 parts of anhydrous MgSO4, 0.5-2.5 parts of initiator, 2-3 parts of cross-linking agent, 5-8 parts of metal salt additive, 1-3 parts of lubricant, 0.3-0.6 parts of antioxidant, and 3-4 parts of masterbatch.

[0008] The method for preparing the sheath layer comprises the following steps:

[0009] S1: mixing lignin with an alkaline solution, heating and dissolving, adding propylene oxide, and reacting under heating conditions, and then adjusting the pH, filtering, washing, and drying in sequence to obtain propylene oxide-modified lignin (HL);

[0010] S2: adding furfuryl alcohol to a NaOH solution and reacting at room temperature, followed by sequential addition of 4-chloromethylstyrene, toluene, and tetrabutylammonium hydroxide. After the reaction is complete, extraction is performed using methyl tert-butyl ether and distilled water. The upper layer solution obtained by the extraction is reacted with anhydrous magnesium sulfate to form a solid, which is then subjected to rotary evaporation and drying to obtain styryl furan monomer (SEF);

[0011] S3: adding a thermoplastic elastomer (TPE) into a torque rheometer, heating it until completely melted, and then sequentially adding an initiator and a styrene furan monomer to obtain a grafted product of the thermoplastic elastomer (SEF-g-TPE);

[0012] S4: kneading the SEF-g-TPE compound in an open mill, and then sequentially adding epoxy-modified lignin and a cross-linking agent and kneading them to obtain a lignin-based thermoplastic elastomer composite material;

[0013] S5 adds the lignin-based thermoplastic elastomer composite material, the metal salt additive, the lubricant, and the antioxidant to the internal mixer in sequence and mixes them evenly to obtain a weather-resistant new energy vehicle charging cable sheath material;

[0014] S6 puts the weather-resistant new energy vehicle charging cable sheath material and masterbatch into a twin-screw extruder for heating and extrusion.

[0015] The lignin is derived from any one of alkali lignin from alkaline pulping and papermaking, enzymatic lignin obtained by producing ethanol from lignocellulose, and organic solvent lignin extracted from lignocellulose by an organic solvent method.

[0016] The thermoplastic elastomer is one or more of hydrogenated styrene-butadiene block copolymer (SEBS), polyurethane (TPU) and styrene-butadiene-styrene block copolymer (SBS).

[0017] The initiator is one or more of benzoyl peroxide, dibenzoyl peroxide, dodecyl peroxide and dicumyl peroxide.

[0018] The cross-linking agent is bismaleimide.

[0019] The lubricant is one or more of hydroxystearic acid, stearyl alcohol, N,N-ethylenebisstearamide (EBS) and N,N-ethylenebisricinoleamide.

[0020] The metal salt additive is one of zinc chloride, ferric chloride, copper chloride, cobalt chloride and nickel chloride.

[0021] The antioxidant is one or more of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 2,2'-methylenebis(4-methyl-6-tert-butyl)phenol, and N-N'-di(2-naphthyl)-p-phenylenediamine.

[0022] The temperature of the torque rheometer is 160-200° C., and the rotation speed is 50-60 r / min.

[0023] The temperature of the mixing mill is 170-210° C., and the rotation speed is 50-70 r / min.

[0024] The temperature of the internal mixer is 180-200° C., and the rotation speed is 40-70 r / min.

[0025] The temperature of the heated extrusion is 160-200°C.

[0026] Furthermore, the mass ratio of the grafted product of the thermoplastic elastomer to the epoxy-modified lignin is 2:1; the mass ratio of the weather-resistant new energy vehicle charging cable sheath material to the masterbatch is 17:1.

[0027] The epoxypropylene-modified lignin in this invention is produced by introducing epoxypropylene into lignin, where the alkoxy groups in the epoxypropylene react with the hydroxyl groups in the lignin to form the epoxypropylene-modified lignin. Lignin, a highly abundant polymer compound in nature after cellulose, possesses excellent UV absorption properties due to its unique three-dimensional network structure and abundant aromatic functional groups, making it a potential natural UV protection material. Grafting epoxypropylene groups onto lignin molecules through a condensation reaction not only enhances lignin's UV absorption but also significantly improves the material's resistance to UV-induced aging.

[0028] We have prepared a novel, high-performance lignin-based thermoplastic elastomer (TPE) using biomass-derived lignin as the hard plastic phase and a thermoplastic elastomer (TPE) as the rubber matrix. During its synthesis, furan groups were introduced into the lignin and TPE. The modified lignin and TPE chains were linked via a bismaleimide crosslinker, creating a DA-type dynamic crosslinking network. This network imparts unique properties to the material: at low temperatures, the formation of the DA-type dynamic crosslinking network provides the material with excellent strength and resilience. At high temperatures, however, the cleavage of the DA bonds disintegrates the crosslinking network, restoring the relative mobility between the molecular chains and enabling the material to exhibit melt reprocessing properties. Upon cooling from high to low temperatures, the crosslinking structure within the composite material reforms, demonstrating excellent reversibility. This dynamic crosslinking network design, based on the DA reaction, not only enhances the material's mechanical properties but also provides excellent dynamic performance and environmental adaptability. In practical applications, the material can undergo repeated crosslinking and decrosslinking cycles at varying temperatures, maintaining its functionality and processability, effectively improving the temperature resistance of the TPE.

[0029] The addition of metal salt additives into lignin-based thermoplastic elastomer composites can form non-covalent energy-sacrificing bonds at the interface between lignin and polyolefin thermoplastic elastomer. The non-covalent energy-sacrificing bonds not only help to uniformly disperse lignin in the thermoplastic elastomer, but also enhance the interfacial compatibility between lignin and the thermoplastic elastomer, thereby achieving the toughening effect of the material.

[0030] Beneficial effects:

[0031] The sheath material prepared by the method of the present invention has the following advantages:

[0032] 1. Excellent UV absorption characteristics and anti-UV aging performance.

[0033] Lignin contains a large number of aromatic groups that can effectively absorb ultraviolet light, significantly reducing the photodegradation of the sheath material by ultraviolet rays. By grafting propylene oxide groups onto the lignin molecules through a condensation reaction, the lignin's absorption of ultraviolet light is further enhanced, thereby improving the material's resistance to ultraviolet aging.

[0034] The addition of epoxy-modified lignin significantly enhances the sheath material's resistance to UV aging. Under long-term UV exposure, the sheath material maintains its mechanical and electrical properties, making the surface less susceptible to cracking and degradation, thereby improving the reliability and safety of the charging cable in outdoor environments.

[0035] 2. High temperature resistance.

[0036] By modifying the thermoplastic elastomer material, the present invention effectively improves the heat resistance of the charging cable. The modified thermoplastic elastomer material can maintain stable performance in high-temperature environments, avoiding rapid aging and performance degradation caused by high temperatures, ensuring the safety and reliability of the charging cable during high-current charging.

[0037] 3. Good interface compatibility and toughening effect:

[0038] The use of metal salt additives improves the interfacial compatibility between epoxy-modified lignin and thermoplastic elastomers, enabling a better bond between the two. This good interfacial compatibility not only enhances the overall performance of the material but also achieves a significant toughening effect, allowing the charging cable to maintain good flexibility and impact resistance even in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a process flow chart of an embodiment;

[0040] Figure 2 This is a schematic diagram of the structure of the charging cable prepared in the embodiment. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention are further described in detail below, but the present invention is not limited to these embodiments. Any improvement or replacement based on the basic spirit of the present embodiment still falls within the scope of protection required by the claims of the present invention.

[0042] Example 1

[0043] A method for preparing a weather-resistant new energy vehicle charging cable sheath layer, comprising the following steps:

[0044] S1: 30 g of lignin was weighed and added to 500 mL of 0.2 M NaOH solution. The mixture was heated to 90°C in an oil bath until dissolved. 30 g of propylene oxide was then added to the solution, and the mixture was stirred at 70°C for 3 h to obtain a mixture. The pH of the mixed solution was then adjusted to 2 with 1.0 M H2SO4, filtered and washed, and finally dried at 60°C for 12 h to obtain propylene oxide-modified lignin (HL).

[0045] S2: 0.1M NaOH solution and 20g furfuryl alcohol were stirred at room temperature for 1h to allow for sufficient reaction, followed by the addition of 5g 4-chloromethylstyrene, 5g toluene, and 3g tetrabutylammonium hydroxide. The mixture was stirred in an ice-water bath for 12h. After the reaction, the mixture was extracted with methyl tert-butyl ether and distilled water to remove excess NaOH and furfuryl alcohol. After extraction, the upper layer solution was reacted with 7g anhydrous MgSO4 until no lumps appeared. The mixture was then rotary evaporated and dried to obtain styryl furan monomer (SEF).

[0046] S3: 90 g of hydrogenated styrene-butadiene block copolymer was weighed and added to a torque rheometer. After heating at 160° C. until completely melted, 0.5 g of benzoyl peroxide and 7 g of styryl furan monomer were added in sequence to obtain a graft product of hydrogenated styrene-butadiene block copolymer (SEF-g-SEBS).

[0047] S4: mixing the graft product of hydrogenated styrene-butadiene block copolymer and epoxy-modified lignin in an open mill at a mass ratio of the graft product of hydrogenated styrene-butadiene block copolymer to epoxy-modified lignin of 2:1, adding 2 g of bismaleimide, cutting and milling at 170° C. for 5 minutes, and then annealing in an oven at 60° C. to obtain a lignin-based thermoplastic elastomer composite material;

[0048] S5: Weigh 5 g of zinc chloride, 1 g of hydroxystearic acid, and 0.6 g of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, add them to an internal mixer in sequence, and add a lignin-based thermoplastic elastomer composite material at the same time. Mix them at 200°C for 15 min to obtain a weather-resistant new energy vehicle charging cable sheath material.

[0049] S6 puts the sheath material and masterbatch into the extruder in a mass ratio of 17:1, heats and extrudes them, and then covers them on the shielding layer of the charging cable.

[0050] Example 2

[0051] A method for preparing a weather-resistant new energy vehicle charging cable sheath layer, comprising the following steps:

[0052] S1: 30 g of lignin was weighed and added to 500 mL of 0.2 M NaOH solution. The mixture was heated to 90°C in an oil bath until dissolved. 30 g of propylene oxide was then added to the solution, and the mixture was stirred at 70°C for 3 h to obtain a mixture. The pH of the mixed solution was then adjusted to 2 with 1.0 M H2SO4, filtered and washed, and finally dried at 60°C for 12 h to obtain propylene oxide-modified lignin (HL).

[0053] S2: 0.1M NaOH solution and 22g furfuryl alcohol were stirred at room temperature for 1h to allow for sufficient reaction, followed by the addition of 3g 4-chloromethylstyrene, 5.5g toluene, and 3g tetrabutylammonium hydroxide. The mixture was stirred in an ice-water bath for 12h. After the reaction, the mixture was extracted with methyl tert-butyl ether and distilled water to remove excess NaOH and furfuryl alcohol. After extraction, the upper layer solution was reacted with 6g anhydrous MgSO4 until no lumps appeared. The mixture was then rotary evaporated and dried to obtain styryl furan monomer (SEF).

[0054] S3: 80 g of polyurethane was weighed and added to a torque rheometer. After heating at 160° C. until completely melted, 1.5 g of dibenzoyl peroxide and 7 g of styryl furan monomer were added in sequence to obtain a polyurethane graft product (SEF-g-TPU).

[0055] S4: 40 g of the grafted product of the polyurethane obtained in S3 and 20 g of propylene oxide-modified lignin are mixed in an open mill, and then 2.5 g of bismaleimide is added. The mixture is cut and rolled at 170° C. for 5 minutes. After mixing evenly, the mixture is annealed in an oven at 60° C. to obtain a lignin-based thermoplastic elastomer composite material.

[0056] S5: 7 g of copper chloride, 2 g of N,N-ethylenebisstearamide (EBS), and 0.5 g of 2,2'-methylenebis(4-methyl-6-tert-butyl)phenol were weighed and added to an internal mixer in sequence. The lignin-based thermoplastic elastomer composite material was also added and mixed at 200°C for 15 min to obtain a weather-resistant new energy vehicle charging cable sheath material.

[0057] S6 puts the weather-resistant new energy vehicle charging cable sheath material and 3g of masterbatch into the extruder for heating and extrusion, and then covers the shielding layer of the charging cable.

[0058] Example 3

[0059] A method for preparing a weather-resistant new energy vehicle charging cable sheath layer, comprising the following steps:

[0060] S1: 30 g of lignin was weighed and added to 500 mL of 0.2 M NaOH solution. The mixture was heated to 90°C in an oil bath until dissolved. 30 g of propylene oxide was then added to the solution, and the mixture was stirred at 70°C for 3 h to obtain a mixture. The pH of the mixed solution was then adjusted to 2 with 1.0 M H2SO4, filtered and washed, and finally dried at 60°C for 12 h to obtain propylene oxide-modified lignin (HL).

[0061] S2: 0.1M NaOH solution and 25g furfuryl alcohol were stirred at room temperature for 1h to allow for sufficient reaction, followed by the addition of 2g 4-chloromethylstyrene, 6g toluene, and 1.5g tetrabutylammonium hydroxide. The mixture was stirred in an ice-water bath for 12h. After the reaction, the mixture was extracted with methyl tert-butyl ether and distilled water to remove excess NaOH and furfuryl alcohol. After extraction, the upper layer solution was reacted with 5g anhydrous MgSO4 until no lumps appeared. The mixture was then rotary evaporated and dried to obtain styryl furan monomer (SEF).

[0062] S3: 80 g of styrene-butadiene-styrene block copolymer was weighed and added to a torque rheometer. After heating at 160° C. until completely melted, 2.5 g of lauroyl peroxide and 7 g of styryl furan monomer were added in sequence to obtain a graft product of styrene-butadiene-styrene block copolymer (SEF-g-SBS).

[0063] S4: mixing 40 g of the grafted product of the styrene-butadiene-styrene block copolymer obtained in S3 and 20 g of propylene oxide-modified lignin in an open mill, then adding 3 g of bismaleimide, cutting and milling at 170° C. for 5 minutes, and then annealing in an oven at 60° C. to obtain a lignin-based thermoplastic elastomer composite material;

[0064] S5: Weigh 8 g of nickel chloride, 3 g of N,N-ethylenebis(ricinoleic acid amide), and 0.3 g of N-N'-di(2-naphthyl)-p-phenylenediamine, add them to an internal mixer in sequence, and add a lignin-based thermoplastic elastomer composite material at the same time. Mix them at 200°C for 15 minutes to obtain a weather-resistant new energy vehicle charging cable sheath material.

[0065] S6 puts the weather-resistant new energy vehicle charging cable sheath material and 4g of masterbatch into the extruder for heating and extrusion, and then covers the shielding layer of the charging cable.

[0066] Comparative Example 1

[0067] Based on Example 1, the difference from Example 1 is that: 1) propylene oxide-modified lignin is not added; 2) steps S1 and S4 are not included, and in step S5, 5 g of zinc chloride, 1 g of hydroxystearic acid, and 0.6 g of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene are weighed and added to an internal mixer in sequence, and a graft product of a hydrogenated styrene-butadiene block copolymer (SEF-g-TPE) is added at the same time, and the mixture is mixed at 200° C. for 15 min to obtain a weather-resistant new energy vehicle charging cable sheath material.

[0068] Comparative Example 2

[0069] Based on Example 1, the difference from Example 1 is that: 1) Steps S2 and S3 are not included, and in step S4, the hydrogenated styrene-butadiene block copolymer and the epoxy-modified lignin are mixed in an open mill according to a mass ratio of hydrogenated styrene-butadiene block copolymer: epoxy-modified lignin = 2:1, and then 2 g of bismaleimide is added. The mixture is cut and rolled at 170°C for 5 minutes, and after mixing evenly, it is annealed in an oven at 60°C to obtain a lignin-based thermoplastic elastomer composite material.

[0070] The materials prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance tests, as follows:

[0071] Tensile strength and elongation at break tests: Tested in accordance with the provisions of GB / T 8804.2-2016;

[0072] UV aging resistance test: Tested according to Method A in GB / T 16422.3-2014, with UV irradiation time of 30 days;

[0073] Table 1 Performance test

[0074]

[0075] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any researcher in this field may, without departing from the spirit and scope of the present invention, adopt the design parameters and contents of the above-disclosed embodiments to change and modify the research scheme of the present invention. Therefore, any simple modifications, parameter changes, and modifications made to the above-disclosed embodiments based on the research essence of the present invention without departing from the content of the present invention are within the scope of protection of the present invention.

Claims

1. A weather-resistant new energy vehicle charging cable, characterized in that: The charging cable consists of a cable core, a shielding layer wrapped around the cable core, and a sheath layer wrapped around the shielding layer; the cable core is composed of a conductor and an insulation layer; the sheath layer of the weather-resistant new energy vehicle charging cable is composed of the following components, by weight: 70-90 parts of thermoplastic elastomer, 20-30 parts of lignin, 25-30 parts of propylene oxide, 20-25 parts of furfuryl alcohol, 2-5 parts of 4-chloromethylstyrene, 1.5-3 parts of tetrabutylammonium hydroxide, 5-6 parts of toluene, 10-25 parts of methyl tert-butyl ether, 5-7 parts of anhydrous MgSO4, 0.5-2.5 parts of initiator, 2-3 parts of crosslinking agent, 5-8 parts of metal salt additive, 1-3 parts of lubricant, 0.3-0.6 parts of antioxidant, and 3-4 parts of masterbatch.

2. A weather-resistant new energy vehicle charging cable as claimed in claim 1, characterized in that: The method for preparing the sheath layer comprises the following steps: S1: mixing lignin with an alkaline solution, heating and dissolving, adding propylene oxide, and reacting under heating conditions, and then adjusting the pH, filtering, washing, and drying in sequence to obtain propylene oxide-modified lignin; S2: adding furfuryl alcohol to a NaOH solution and reacting at room temperature, followed by sequentially adding 4-chloromethylstyrene, toluene, and tetrabutylammonium hydroxide. After the reaction is complete, extraction is performed using methyl tert-butyl ether and distilled water. The upper layer solution obtained by the extraction is reacted with anhydrous magnesium sulfate to form a solid, which is then subjected to rotary evaporation and drying to obtain a styrylfuran monomer. S3: adding the thermoplastic elastomer to a torque rheometer, heating it until it is completely melted, and then sequentially adding an initiator and a styrene furan monomer to obtain a grafted product of the thermoplastic elastomer; S4: kneading the grafted product composite of the thermoplastic elastomer in an open mill, and then sequentially adding the epoxy-propylene-modified lignin and the cross-linking agent and kneading them to obtain a lignin-based thermoplastic elastomer composite material; S5 adds the lignin-based thermoplastic elastomer composite material, the metal salt additive, the lubricant, and the antioxidant to the internal mixer in sequence and mixes them evenly to obtain a weather-resistant new energy vehicle charging cable sheath material; S6 puts the weather-resistant new energy vehicle charging cable sheath material and masterbatch into a twin-screw extruder for heating and extrusion.

3. A weather-resistant new energy vehicle charging cable as claimed in claim 2, characterized in that: The thermoplastic elastomer is one or more of SEBS, TPU, and SBS; the initiator is one or more of benzoyl peroxide, dibenzoyl peroxide, dodecyl peroxide, and diisopropylbenzene peroxide; the crosslinker is bismaleimide; the lubricant is one or more of hydroxystearic acid, stearyl alcohol, N,N-ethylenebisstearamide, and N,N-ethylenebisricinoleamide; the metal salt additive is one of zinc chloride, ferric chloride, copper chloride, cobalt chloride, and nickel chloride; and the antioxidant is one or more of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 2,2'-methylenebis(4-methyl-6-tert-butyl)phenol, and N-N'-di(2-naphthyl)-p-phenylenediamine.

4. A weather-resistant new energy vehicle charging cable as claimed in claim 2, characterized in that: The temperature of the torque rheometer is 160-200° C., and the rotation speed is 50-60 r / min.

5. A weather-resistant new energy vehicle charging cable as claimed in claim 2, characterized in that: The temperature of the open mixer is 170-210°C, and the rotation speed is 50-70r / min; the temperature of the internal mixer is 180-200°C, and the rotation speed is 40-70r / min; the temperature of the heated extrusion is 160-200°C.

6. A weather-resistant new energy vehicle charging cable as claimed in claim 2, characterized in that: The mass ratio of the grafted product of the thermoplastic elastomer to the epoxy-modified lignin is 2:

1.

7. A weather-resistant new energy vehicle charging cable as claimed in claim 2, characterized in that: The mass ratio of the weather-resistant new energy vehicle charging cable sheath material and the masterbatch is 17:1.

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