A wear-resistant charging cable and a charging pile thereof

Abstract

The application relates to the technical field of new energy automobile charging, in particular to a wear-resistant charging cable and a charging pile thereof, which comprise a cable core body, a wrapping layer and an outer coating layer coaxially arranged from inside to outside, the outer coating layer is composed of a TPE inner protective layer and a nylon outer protective layer, the TPE inner protective layer comprises the following components in a weight ratio: 30-31 parts of SEBS thermoplastic elastomer, 0.5 parts of polyphenyl ether, 19-20 parts of 150N base oil, 7.7 parts of heavy calcium powder, 2.8-2.9 parts of talcum powder, 2-3 parts of silicone powder, 0.7-0.8 parts of 900cs silicone oil, 9-10 parts of magnesium powder, 4-5 parts of POE-3000-4 carbon, 3.8-3.9 parts of a compatibilizer, 2.8-2.9 parts of a color masterbatch, 0.2-0.5 parts of an activator, 0.2-0.6 parts of an antioxidant, and 0.1-0.4 parts of erucic acid amide. The outer coating layer is provided with a double-layer structure, the outer protective layer extrudes a thin transparent nylon layer to enhance the self-cleaning and wear-resistant functions of the outer coating layer, and the TPE inner protective layer material is improved to improve the bending resistance and wear resistance of the charging cable.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle charging technology, specifically to a wear-resistant charging cable and its charging pile. Background Technology

[0002] With the rapid development of new energy sources, especially the expansion of the electric vehicle market, the demand for charging pile cables has increased significantly, bringing unprecedented opportunities and challenges to the cable industry. As a crucial component connecting charging piles and vehicles, the performance of charging pile cables directly affects charging efficiency and safety.

[0003] In actual use, the outer sheath of existing new energy charging pile cables is prone to wear and peeling due to frequent dragging, twisting, knotting, crushing, and scratching. This not only affects the appearance and protective performance of the cable, but may also expose the internal conductors, increasing the safety risks of short circuits and leakage. This affects the stability and reliability of charging and shortens the cable's lifespan. Summary of the Invention

[0004] This invention provides a wear-resistant charging cable and its charging pile to solve the technical problem that the wear resistance of existing charging pile cables is difficult to meet the actual use requirements.

[0005] To address the aforementioned problems, the present invention provides a wear-resistant charging cable, comprising a cable core, a wrapping layer, and an outer sheath arranged coaxially from the inside out. The outer sheath is composed of a TPE inner sheath and a nylon outer sheath. The TPE inner sheath comprises the following components in the following weight ratios:

[0006] SEBS thermoplastic elastomer 30-31 parts, polyphenylene ether 0.5 parts, 150N base oil 19-20 parts, heavy calcium carbonate powder 7.7 parts, talc powder 2.8-2.9 parts, silicone powder 2-3 parts, 900cs silicone oil 0.7-0.8 parts, magnesium powder 9-10 parts, POE-3000-4 carbon 4-5 parts, compatibilizer 3.8-3.9 parts, color masterbatch 2.8-2.9 parts, activator 0.2-0.5 parts, antioxidant 0.2-0.6 parts, erucamide 0.1-0.4 parts.

[0007] The cable core transmits current, the wrapping layer secures and protects the internal structure, and the outer sheath primarily provides abrasion resistance and protection. The wrapping layer tightly encases the cable core, absorbing and dispersing stress generated when the charging cable bends. When the stress is relieved, the outer sheath helps the internal cable core return to its original shape, reducing damage from external stress and effectively protecting the internal cable core. The wrapping layer also prevents the cable core from sticking to the outer sheath.

[0008] This invention employs a double-layer structure for the outer sheath. A thin, transparent nylon layer is extruded over the outer sheath to enhance its self-cleaning function. The use of nylon as the outer sheath provides wear resistance, high gloss (non-dust adhesion), and anti-aging properties. The inner sheath is made of TPE material with a certain degree of elasticity and flexibility, ensuring that the overall bending and torsional toughness of the charging cable meets requirements. This TPE inner sheath has advantages such as good resilience, bending resistance, torsion resistance, good surface smoothness, and high density.

[0009] The TPE inner sheath uses SEBS thermoplastic elastomer as the matrix material to provide good elasticity, flexibility and a certain tensile strength.

[0010] PPO (polyphenylene oxide) can improve the heat resistance of materials and, in synergy with SEBS (thermoplastic elastomer), improve mechanical properties such as dimensional stability and mechanical strength.

[0011] 150N base oil can increase the fluidity of materials, improve processing performance, help the components to mix evenly during processing, and improve production efficiency.

[0012] TD350 heavy calcium carbonate acts as a filler and reinforcement, reducing costs and improving hardness and dimensional stability. Talc improves the material's rigidity, wear resistance, heat resistance, and dimensional stability, and enhances surface smoothness. Together with TD350 heavy calcium carbonate, talc strengthens the mechanical properties of the TPE inner sheath.

[0013] POE-3000-4 carbon-reinforced materials improve flexibility and impact resistance, and synergistically enhance the toughness of the TPE inner sheath with SEBS thermoplastic elastomer.

[0014] Compatibilizers promote compatibility between different components, improve material uniformity and performance stability, ensure thorough mixing of each component to maximize their respective advantages, and avoid problems such as phase separation. Activators enhance the chemical reactivity of the material, promote cross-linking or other chemical reactions, and help improve the chemical and physical properties of the TPE inner sheath. Antioxidants prevent oxidative degradation of the material during processing and use, extend its service life, and work synergistically with other stabilizers to improve the stability and durability of the TPE inner sheath.

[0015] The combined action of silicone powder and 900cs silicone oil optimizes the wear resistance of the material. Erucamide improves the material's slip properties and release properties, and together with 900cs silicone oil and silicone powder, makes the surface of the TPE inner sheath smoother, easier to process and use.

[0016] In summary, each component plays its unique role in the TPE inner sheath, and through mutual synergy, the TPE inner sheath possesses excellent comprehensive properties such as resilience, strength, abrasion resistance, weather resistance, and processability to meet specific application requirements.

[0017] As a preferred embodiment of the present invention, the activator includes one or more of stearic acid, zinc oxide and calcium oxide.

[0018] As a preferred embodiment of the present invention, the compatibilizer is a maleic anhydride grafted compatibilizer.

[0019] As a preferred embodiment of the present invention, the nylon outer sheath comprises the following components in the following weight ratios: 5-80 parts PA665, 10-40 parts carbon fiber, 5-15 parts wear-resistant agent, 0.1-1 part antioxidant, and 0.5-2 parts lubricant.

[0020] As a preferred embodiment of the present invention, the cable core is composed of multiple core components with different cross-sections, concentrically stranded into a cable. Each core component comprises two main power cores, one ground core, two auxiliary insulating cores, one control core component, and two signal core components. The concentric stranding ensures a tight bond between the core components, resulting in better structural integrity of the charging cable. When subjected to tensile, torsional, or bending forces, the core components mutually restrain each other, reducing deformation and displacement, and better maintaining the overall shape and structural stability. Simultaneously, the concentric stranding can, to a certain extent, cancel or balance the magnetic field formed by the multiple cores, reducing adverse effects of electromagnetic interference on signal and current transmission.

[0021] As a preferred embodiment of the present invention, the control wire core component is composed of multiple control wire cores concentrically twisted together and covered with a protective inner sheath.

[0022] As a preferred embodiment of the present invention, the signal core component is formed by twisting two signal cores together and is covered with a protective inner sheath.

[0023] In a preferred embodiment of the present invention, the cross-sections of the wire cores, from smallest to largest, are control wire core, signal wire core, insulation wire core, ground wire core, and power main wire core; the twisting factor of the small cross-section wire core is greater than or equal to the twisting factor of the large cross-section wire core. The twisting factor refers to the ratio of the actual length of the stranded wire to the pitch length of the stranded wire. When the twisting factor of the small cross-section wire core is greater than that of the large cross-section wire core, the large cross-section wire core will bear the tension, torsion, and bending stress of the entire cable first. This helps to evenly distribute the stress borne by each part during the operation of the cable (the purpose of large cross-sections bearing greater stress and small cross-section wire cores bearing less stress), reducing the possibility of damage to the small cross-section wire core due to excessive stress, thereby improving the overall performance and service life of the charging cable.

[0024] In a preferred embodiment of the present invention, the conductor elongation of the wire core is inversely proportional to the cross-sectional area of ​​the wire core, and the conductor elongation of the small-section wire core is not less than that of the large-section wire core. This arrangement ensures that, while fulfilling their functional requirements, the entire charging cable maintains good tensile performance and reliability under various usage conditions. The small-section wire core possesses better flexibility and stretchability to adapt to changes in complex usage environments such as bending and torsion, preventing the small-section wire core from being preferentially stressed and breaking.

[0025] As a preferred embodiment of the present invention, the ratio of the pitch of the signal core assembly and the control core assembly to their respective outer diameters is 6-8 times; the ratio of the pitch of the insulated core to its own outer diameter is 8-10 times; and the ratio of the pitch to the outer diameter of the ground core and the main power core is 12-16 times.

[0026] As a preferred embodiment of the present invention, a flame-retardant filler layer is further provided between the cable core and the wrapping layer to ensure the roundness of the cable and prevent unevenness of the cable surface. The flame-retardant filler layer improves the flame retardancy of the cable, further enhancing the safety of the charging pile.

[0027] As a preferred embodiment of the present invention, the wrapping layer is a non-woven fabric layer.

[0028] In another aspect, the present invention provides a charging pile, including a charging cable as described above, a cable reel, and a charging pile body. The cable reel is fixedly disposed on one side of the charging pile body and is used to store the charging cable.

[0029] As a preferred embodiment of the present invention, the winding reel is provided with a cleaning elastomer.

[0030] The beneficial effects are:

[0031] This invention employs a double-layer structure for the outer sheath. A thin layer of transparent nylon is extruded over the outer sheath to enhance its self-cleaning function. The use of nylon as the outer sheath provides wear resistance, high gloss (non-dust adhesion), and anti-aging properties. The inner sheath is made of TPE material with a certain degree of elasticity and flexibility. By improving the TPE formula, the overall bending, torsional toughness, and wear resistance of the charging cable are enhanced, making it suitable for higher-performance applications. To address the issue of small-section conductors being easily damaged, and to improve the overall performance and lifespan of the charging cable, this invention sets the twist coefficient of the small-section conductors to be greater than or equal to that of the large-section conductors. This ensures that the large-section conductors are subjected to greater stress during bending, torsion, and stretching, reducing the possibility of damage to the small-section conductors due to excessive force. Simultaneously, the conductor elongation of the small-section conductors is set to be no less than that of the large-section conductors, ensuring that the small-section conductors possess good flexibility and stretchability to adapt to changes in complex operating environments such as bending and torsion, preventing the risk of breakage of the small-section conductors. Attached Figure Description

[0032] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0033] Figure 1 This is a schematic diagram of the wear-resistant charging cable of the present invention;

[0034] Figure 2 This is a schematic diagram of the charging pile structure;

[0035] Figure 3 A cross-sectional view of the reel for setting up the filler.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Ground wire core; 2. Insulated wire core; 3. Power main wire core; 4. Control wire core assembly; 5. Signal wire core assembly; 6. Wrapping layer; 7. TPE inner sheath; 8. Nylon outer sheath; 9. Charging cable; 10. Reel; 11. Shaft; 12. Cleaning elastomer; 13. Dust cover; 14. Filler. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Charging pile cables face frequent dragging, bending, and movement during actual use. This not only easily leads to wear and peeling of the outer sheath, exposing the internal conductors and increasing safety risks such as short circuits and leakage, but also, due to the inevitable twisting, bending, and dragging during use, the internal wire cores are prone to misalignment over time. Since the signal cores and small-diameter auxiliary power cores inside the cable are usually thinner, they are more sensitive to mechanical stress and more susceptible to damage or even breakage. This situation not only leads to cable instability, such as signal transmission interruptions or unstable power supply, but also increases maintenance and replacement costs, placing a financial burden on charging pile operators.

[0040] To address the issues of easy wear and peeling of the outer sheath of cables, existing technologies have explored various methods to improve the wear resistance of charging pile cables. For example, Chinese invention patent CN115124807A discloses a high-resilience, wear-resistant coated TPE material and its preparation method. The raw materials include SEBS, amine-modified SEBS, polyester polyurethane, metallocene olefin polymer, silicone powder, heavy calcium carbonate, compatibilizer, ultra-high molecular weight polyethylene, lubricant, antioxidant, filler oil, and tackifying resin. The resulting TPE material exhibits excellent performance, including superior resilience, excellent mechanical properties, good processability, strong coating capacity, simple processing, and recyclability. This invention constructs a double-layer structure for the outer sheath, with an inner TPE inner sheath and an outer extruded nylon outer sheath. Furthermore, the TPE inner sheath material and its proportions are improved to meet the requirements for higher wear resistance, tensile strength, and longer lifespan of charging cables.

[0041] To address the issue of thinner wires inside cables being easily damaged or even broken, Chinese invention patent CN104299690A discloses a highly flexible electric vehicle charging pile cable. This cable incorporates copper foil wires and bulletproof wires within the signal and power transmission wires, making the conductors more flexible and resilient. This increases the overall flexibility of the cable and protects the signal wires and small-square-meter core wires from breakage due to bending during installation and use. Another example is Chinese invention patent CN112447315A, which discloses a high-power charging cable for new energy vehicles and its manufacturing method. This cable incorporates a copper wire braided layer and sheath structure for shielding within the signal wires to prevent core breakage during mobile use.

[0042] All of the above technical solutions require altering the structure of the internal fine wire core to enhance its tensile strength, which in turn increases the difficulty of core production.

[0043] This invention ensures that the large-section wire core is subjected to greater stress during bending, torsion, and stretching by setting the twisting coefficient of the small-section wire core to be greater than that of the large-section wire core, thus reducing the possibility of damage to the small-section wire core due to excessive stress. Simultaneously, the conductor elongation of the small-section wire core is set to be no less than that of the large-section wire core, ensuring that the small-section wire core possesses good flexibility and stretchability to adapt to changes in complex operating environments such as bending and torsion, preventing breakage of the small-section wire core. This invention solves the technical problem of easy breakage of thin wire cores (such as signal lines) in existing charging pile cables without changing the structure of the thin wire core.

[0044] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0045] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0046] Example 1:

[0047] like Figure 1The wear-resistant charging cable 9 shown comprises a cable core, a wrapping layer 6, and an outer sheath arranged coaxially from the inside out. The outer sheath consists of a TPE inner sheath 7 and a nylon outer sheath 8 (i.e., the cable core is tightly wrapped with the wrapping layer 6, the wrapping layer 6 is tightly wrapped with the TPE inner sheath 7, and the TPE inner sheath 7 is tightly wrapped with the nylon outer sheath 8). The wrapping layer 6 tightly wraps the cable core, absorbing and dispersing the stress generated when the charging cable 9 is bent. When the stress is relieved, the outer sheath helps the internal cable core return to its original shape, reducing the damage caused by external stress to the charging cable 9 and effectively protecting the internal cable core. Simultaneously, the wrapping layer 6 also prevents the cable core from sticking to the outer sheath.

[0048] The cable core is composed of multiple core components with different cross-sections, concentrically twisted together. These core components consist of two main power cores 3, one ground core 1, two auxiliary insulated cores 2, one control core component 4, and two signal core components 5. The two auxiliary insulated cores 2 are symmetrically distributed about the ground core 1, and the two signal cores 5 are symmetrically distributed about the control core 4. The signal core component 5 is a twisted-pair structure, consisting of two signal cores twisted together and covered with a protective inner sheath. The control core component 4 is composed of multiple control cores concentrically twisted together and covered with a protective inner sheath. In this embodiment, the protective inner sheath is made of thermoplastic elastomer (TPE).

[0049] The cross-sections of the wire cores, from smallest to largest, are control core, signal core, insulated core 2, ground core 1, and main power core 3. In the charging cable, due to the significant difference in cross-section between the main power core 3 and the signal and control cores, the signal and control cores are more prone to breakage when bent under the same surface tension. This can lead to communication interruption and control failure during charging, causing a series of problems such as overcharging, insufficient power supply, and failure of protective devices, thereby triggering safety accidents during charging.

[0050] To address the aforementioned issues, the twisting factor of the smaller cross-section core is greater than that of the larger cross-section core. This setting means that during the twisting process, the smaller cross-section core has a greater offset relative to the central axis, while the larger cross-section core will bear the overall tensile, torsional, and bending stress of the cable first. This helps to evenly distribute the stress borne by each part during cable operation (the larger cross-section core bears greater stress while the smaller cross-section core bears less stress), reducing the possibility of damage to the smaller cross-section core due to excessive stress, thereby improving the overall performance and service life of the charging cable.

[0051] In this embodiment, the pitch-to-outer-diameter ratio of the signal core element 5 is 6 times, the pitch-to-outer-diameter ratio of the control core element 4 is 6 times, the pitch-to-outer-diameter ratio of the insulated core 2 is 8 times, and the pitch-to-outer-diameter ratio of the ground core 1 and the power main core 3 is 12 times.

[0052] Of course, in other embodiments, the pitch-to-outer-diameter ratio of the signal core element 5 can be set to 7 or 8 times, the pitch-to-outer-diameter ratio of the control core element 4 can be set to 7 or 8 times, the pitch-to-outer-diameter ratio of the insulated core 2 can be set to 9 or 10 times, and the pitch-to-outer-diameter ratio of the ground core 1 and the power main core 3 can be set to 13, 14, 15 or 16 times.

[0053] The conductor elongation of the wire core is inversely proportional to the cross-sectional area of ​​the wire core; the conductor elongation of a small cross-section wire core is not less than that of a large cross-section wire core. By giving the small cross-section wire core good flexibility and stretchability, it can adapt to the changes in the charging cable 9 under complex usage environments such as bending and torsion, and prevent the small cross-section wire core from breaking.

[0054] The 6th layer of the wrapping tape is a non-woven fabric layer.

[0055] In other embodiments, a flame-retardant filler layer is also provided between the cable core and the wrapping layer 6 to ensure the roundness of the cable and prevent unevenness of the cable surface. That is, when the cable core is cabled, a flame-retardant filler layer is used to fill it, making the outer periphery of the cable core round and tight; the outer periphery of the flame-retardant filler layer is tightly wrapped with the wrapping layer 6. The setting of the flame-retardant filler layer makes the structure of the charging cable 9 more compact, prevents the overall twisting and knotting phenomenon when the charging cable 9 is twisted, and allows the charging cable 9 to recover more quickly when the external force is removed.

[0056] The outer sheath adopts a double-layer structure. The TPE inner sheath 7 is made of thermoplastic elastomer (TPE) material to ensure the overall bending and torsional toughness requirements of the cable. The nylon outer sheath 8 is made of wear-resistant, high-gloss nylon material to ensure that the outer surface of the cable is wear-resistant and does not stick to dust, and has anti-aging function.

[0057] The TPE inner sheath 7 comprises the following components in the following weight ratios:

[0058] 30 parts SEBS thermoplastic elastomer, 0.5 parts polyphenylene ether, 19 parts 150N base oil, 7.7 parts heavy calcium carbonate powder, 2.8 parts talc powder, 2 parts silicone powder, 0.7 parts 900cs silicone oil, 9 parts magnesium powder, 4 parts POE-3000-4 carbon, 3.8 parts compatibilizer, 2.8 parts color masterbatch, 0.2 parts activator, 0.2 parts antioxidant, and 0.1 parts erucamide.

[0059] In this embodiment, the activator is stearic acid. Of course, in other embodiments, the activator may also be zinc oxide or calcium oxide, or several of stearic acid, zinc oxide and calcium oxide.

[0060] The nylon outer sheath 8 comprises the following components in parts by weight:

[0061] PA66 65 parts, carbon fiber 30 parts, wear-resistant agent 10 parts, antioxidant 0.5 parts, lubricant 1 part.

[0062] The manufacturing method of charging cable 9 includes the following steps:

[0063] S1. Place the two main power cores 3 in the middle position, place the ground core 1 and the control core 4 on the upper and lower sides of the main power core 3 respectively, place the two auxiliary insulation cores 2 on the left and right sides of the ground core 1 respectively, and place the two signal core components 5 on the left and right sides of the control core component 4 respectively. Then, use a cabling machine to concentrically twist the components into a cable to obtain the cable core.

[0064] S2. Wrap and tighten the non-woven fabric around the outside of the cable core to form a wrapping layer 6;

[0065] S3. Raw material for making the TPE inner protective layer 7 - TPE granules:

[0066] S31, SEBS thermoplastic elastomer, polyphenylene ether, 150N base oil, heavy calcium carbonate powder, talc powder, silicone powder, 900cs silicone oil, magnesium powder, POE-3000-4 carbon, compatibilizer, color masterbatch, activator, antioxidant, and erucamide are weighed and mixed according to the formula. The mixture is then placed in a fully enclosed high-speed mixing tank and stirred evenly. The temperature is controlled at 80℃±5℃ and stirred for 20 minutes.

[0067] S32. The well-mixed raw materials are fed into a twin-screw extruder for further melting. The twin-screw compounding extrusion temperatures are set as follows: first stage 185℃, second stage 195℃, third stage 215℃, fourth stage 220℃, and die head 190℃. Under shear force, the raw materials gradually melt and mix evenly to form a homogeneous melt.

[0068] S33. After melting, the melt enters the plasticizing stage. The extrusion plasticizing temperature is 190~195℃, the twin screw speed is controlled at 450~480 rpm, and the die head pressure is controlled at 5~6 MPa to further plasticize the melt.

[0069] S34. Cool the plasticized material through a cooling system until it reaches room temperature, so that the material gradually solidifies and maintains its shape.

[0070] S35. The cooled material is fed into a granulator for cutting, granulation and screening; the granulator cuts the material into uniform TPE granules for easy subsequent processing and use; the granulated granules are screened by screening equipment to remove unqualified granules and impurities, ensuring the purity and quality of the TPE granules.

[0071] S4. The TPE granules obtained are extruded through an extruder to form a TPE inner sheath 7 on the outside of the wrapping layer 6, and a nylon outer sheath 8 is extruded on the outside of the TPE inner sheath 7 to obtain the charging cable 9.

[0072] Step S33 ensures the TPE plasticizing effect by adjusting the rotation speed of the twin screws and controls the uniformity of the extrusion amount in the melt flow state by controlling the extrusion plasticizing temperature.

[0073] This embodiment also provides a charging pile, including the charging cable 9 as described above, as well as the cable reel 10 and the charging pile body. The cable reel is fixedly disposed on one side of the charging pile body, and the cable reel 10 is used to store the charging cable 9. The charging cable 9 is connected between the charging pile body and the charging gun head.

[0074] Preferably, the reel 10 has a self-winding function, and the charging cable 9 and the gun head can freely extend and retract around the pivot 11, ensuring that the charging cable 9 can be wound up freely and the gun cable will not fall off.

[0075] In other embodiments, such as Figure 3 As shown, a cleaning elastomer 12 is provided on the reel 10. The cleaning elastomer 12 is used to passively wipe away debris, dust, water droplets, and other contaminants from the surface of the charging cable 9 as it rotates. The cleaning elastomer 12 can be made of a sponge, microfiber cloth, brush, or other elastic material with cleaning function to reduce the accumulation of dirt and dust on the charging cable 9, improve the cleanliness of the charging cable 9 surface, reduce friction between the charging cables 9, and thus reduce wear on the charging cable 9. Furthermore, the cleaning elastomer 12 can automatically clean the cable surface as the cable is reeled in, without manual intervention.

[0076] In this embodiment, as Figure 2 As shown, the charging station is also equipped with a dust cover 13, which covers the reel 10 and has an opening for the charging cable 9 to pass through when it is wound up. Figure 3 As shown, the cleaning elastomer 12 is disposed inside the dust cover 13. A filler 14 is also installed on the dust cover 13. The filler 14 can hold disinfectant or cleaning solution and is connected to the cleaning elastomer 12 to provide it with disinfectant or cleaning solution, maintaining the antiviral performance (especially anti-mold performance) or cleanliness of the charging cable 9. Furthermore, the filler 14 can easily replenish the disinfectant or cleaning solution, ensuring the effectiveness of the cleaning elastomer 12.

[0077] Example 2:

[0078] Its main difference from Example 1 is:

[0079] In this embodiment, the TPE inner sheath 7 comprises the following components in the following weight ratios:

[0080] 30.5 parts SEBS thermoplastic elastomer, 0.5 parts polyphenylene ether, 19.5 parts 150N base oil, 7.7 parts heavy calcium carbonate powder, 2.85 parts talc powder, 2.5 parts silicone powder, 0.75 parts 900cs silicone oil, 9.5 parts magnesium powder, 4.5 parts POE-3000-4 carbon, 3.85 parts compatibilizer, 2.85 parts color masterbatch, 0.3 parts activator, 0.4 parts antioxidant, and 0.2 parts erucamide.

[0081] Example 3:

[0082] Its main difference from Example 1 is:

[0083] In this embodiment, the TPE inner sheath 7 comprises the following components in the following weight ratios:

[0084] 31 parts SEBS thermoplastic elastomer, 0.5 parts polyphenylene ether, 20 parts 150N base oil, 7.7 parts heavy calcium carbonate powder, 2.9 parts talc powder, 3 parts silicone powder, 0.8 parts 900cs silicone oil, 10 parts magnesium powder, 5 parts POE-3000-4 carbon, 3.9 parts compatibilizer, 2.9 parts color masterbatch, 0.5 parts activator, 0.6 parts antioxidant, and 0.4 parts erucamide.

[0085] The only difference between Comparative Example 1 and Example 1 is that the TPE inner sheath 7 does not contain POE-3000-4 carbon.

[0086] The only difference between Comparative Example 2 and Example 1 is that the TPE inner sheath 7 does not contain silicone powder and 900cs silicone oil.

[0087] The main performance indicators of Examples 1-3 and Comparative Examples 1-2 are compared in the table below:

[0088] The tensile strength and elongation at break of the cable were tested according to GB / T 2951.11-2008, and the abrasion performance of the cable was tested according to GB / T 3960-2016. The test results are shown in the table below:

[0089]

[0090] According to the data from Examples 1-3 and Comparative Example 1, the addition of POE-3000-4 carbon to the TPE inner sheath 7 significantly improves the toughness of the charging cable 9.

[0091] According to the data from Examples 1-3 and Comparative Example 2, the TPE inner sheath 7 significantly improves the abrasion resistance of the charging cable 9 by adding silicone powder and 900cs silicone oil.

[0092] As can be seen from the table above, the charging cable 9 prepared according to Embodiments 1-3 of the present invention has excellent resilience, tensile strength and abrasion resistance.

Claims

1. A wear-resistant charging cable, characterized in that, The cable includes a cable core, a wrapping layer (6), and an outer sheath arranged coaxially from the inside out. The outer sheath is composed of a TPE inner sheath (7) and a nylon outer sheath (8). The TPE inner sheath (7) comprises the following components in the following weight ratios: SEBS thermoplastic elastomer 30-31 parts, polyphenylene ether 0.5 parts, 150N base oil 19-20 parts, heavy calcium carbonate powder 7.7 parts, talc powder 2.8-2.9 parts, silicone powder 2-3 parts, 900cs silicone oil 0.7-0.8 parts, magnesium powder 9-10 parts, POE-3000-4 carbon 4-5 parts, compatibilizer 3.8-3.9 parts, color masterbatch 2.8-2.9 parts, activator 0.2-0.5 parts, antioxidant 0.2-0.6 parts, erucamide 0.1-0.4 parts; The cable core is formed by concentrically twisting multiple core components with different cross sections. The core component consists of two main power cores (3), one ground core (1), two auxiliary insulating cores (2), one control core component (4), and two signal core components (5). The control core component (4) is made of multiple control cores concentrically twisted together and is covered with a protective inner sheath. The signal core component (5) is formed by twisting two signal cores together and is covered with a protective inner sheath. The cross-sections of the wire cores, from smallest to largest, are control wire core, signal wire core, insulated wire core (2), ground wire core (1), and power main wire core (3); the twisting coefficient of the small cross-section wire core is ≥ the twisting coefficient of the large cross-section wire core.

2. The wear-resistant charging cable as described in claim 1, characterized in that, The conductor elongation of the core is inversely proportional to the cross-section of the core, and the conductor elongation of the core with a small cross-section is not less than that of the core with a large cross-section.

3. The wear-resistant charging cable as described in claim 2, characterized in that, The pitch ratio of the signal core assembly (5) and the control core assembly (4) to their respective outer diameters is 6-8 times; the pitch ratio of the insulated core (2) to its own outer diameter is 8-10 times; and the pitch ratio of the ground core (1) and the power main core (3) to their outer diameters is 12-16 times.

4. A charging pile, characterized in that, The device includes a charging cable (9) as described in any one of claims 1-3, a reel (10) and a charging pile body, wherein the reel (10) is fixedly disposed on one side of the charging pile body and the reel (10) is used to store the charging cable (9).

5. A charging pile as described in claim 4, characterized in that, The winding reel (10) is provided with a cleaning elastomer (12).

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