High-current new energy vehicle charging cables

Abstract

The present invention provides a high-current new energy vehicle charging cable, comprising a double-layer co-extrusion structure formed by a plurality of cable cores and an extruded sheath. The cable core comprises a power cable core, a signal and control cable core, and a power cable core. The power cable core comprises, from the inside to the outside, a twisted conductor layer, a braided layer, a coolant layer, and a cooling tube. A plurality of butterfly swing devices are placed on the outer edge of the braided layer along the length of the cable. The butterfly swing device comprises a slide block, a limit swing claw, a central axis rod, wings, and a fixing clamp. The present invention adopts a cooling tube containing liquid coolant, and the conductor is arranged inside the cooling tube. The conductor passes through a wing device arranged on the upper portion. When the liquid flows, it can drive the wings to swing, thereby driving the upper portion of the conductor to swing, thereby increasing the fluidity of the liquid inside the conductor, increasing the heat dissipation inside the conductor, and increasing the current carrying capacity.

Description

Technical Field

[0001] The present invention relates to the field of cables for charging piles, and in particular to a cable for charging high-current new energy vehicles. Background Art

[0002] According to the latest data, the number of new energy vehicles and charging facilities that meet the 2015 national standard is approximately 4.5 million and 1.52 million, respectively. Currently, the charging power of public charging facilities ranges primarily from 60kW to 180kW, with charging times ranging from 0.5 to 2 hours. As vehicle range continues to increase, some users are increasingly demanding higher-power and faster charging, hoping to reduce charging times to 20 minutes or even less.

[0003] However, as a key product to be launched in the future, super-fast charging, with its high current and high frequency characteristics, will place new demands on charging pile manufacturers. As a crucial component of charging piles, charging pile cables are being developed to facilitate the development of new energy vehicles, increase charging efficiency, and provide a better user experience.

[0004] The cables of the same specifications used in traditional charging gun lines have low current carrying capacity, low charging efficiency, and low technical content, and cannot support the development of new energy vehicles. The main factor restricting the current carrying capacity of charging gun cables is temperature. Excessive current carrying capacity will generate high temperature, affect the service life of the cable, and easily cause safety accidents. Summary of the Invention

[0005] In order to solve the problems of the prior art, the present invention provides a high-current charging cable for new energy vehicles. A cooling tube containing liquid coolant is used inside the cable. The conductor is arranged inside the cooling tube. A wing device is provided on the conductor. When the liquid flows, the wings can be driven to swing, thereby driving the conductor to swing, thereby increasing the fluidity of the liquid inside the conductor, increasing the heat dissipation inside the conductor, and increasing the current carrying capacity.

[0006] The present invention provides a high-current new energy vehicle charging cable, comprising a double-layer co-extrusion structure formed by multiple cable cores and extruded sheaths. The cable core comprises, from the inside out, a stranded conductor layer, a braided layer, a coolant layer, and a cooling tube, wherein a flowing coolant is provided in the cooling tube; multiple butterfly swing devices are placed on the outer edge of the braided layer along the length of the cable, and the butterfly swing devices include a slide block, a limit swing claw, a central axis, wings, and a fixing clamp;

[0007] The chute block is a semicircular structure, with an internal threaded hole in the middle of the semicircular chute block, and limiting swing plates are fixed above and below the threaded hole, and each limiting swing plate is fixed with a number of limiting claws;

[0008] The fixing clamp is clamped on the braided layer and includes two clamping bodies. A cavity is formed in the center of the two clamping bodies for fixing the braided layer and the conductor layer. Fixing holes are respectively provided on both end surfaces of the clamping bodies. The two clamping bodies are fixed together through the fixing holes.

[0009] There are two central shafts, which are fixed to the outside of the middle part of the fixing clamp respectively. One end of the central shaft is fixed to the outside of the fixing clamp by a riveting structure, and the other end is inserted into the internal threaded hole in the middle of the semicircular slide block. The fixing clamp and the central shaft form a "cross" structure.

[0010] The wings are a pair and are respectively fixed on two central shafts.

[0011] As a further improvement, in the chute block, three limiting claws are fixed on each limiting swing plate, the limiting swing plate forms an angle of 5-10 degrees with the semicircular chute block, and a gap is left between two adjacent limiting claws.

[0012] As a further improvement, the end of the limiting claw has a circular chamfer of 0.2-0.9.

[0013] As a further improvement, the lengths of the swing limiting plates on both sides of the central shaft are asymmetric.

[0014] As a further improvement, an S-shaped pattern is evenly distributed on the inner surface of the middle cavity of the fixing clamp.

[0015] As a further improvement, a first bending point is provided on the outer edge of the wing near the inner wall of the cooling tube, and the bending angle is 45 degrees with the central axis.

[0016] As a further improvement, a second bending point is provided on the bottom surface of the wing, with a bending angle of 120 degrees, and the bending points of the two wings are in opposite directions.

[0017] As a further improvement, a circular hole is opened at the tail of the wing and a 45-degree guide angle is opened at the head of the wing.

[0018] As a further improvement, a reflux cooling pipe is extruded inside the sheath, one end of the cooling pipe is connected to the cooling liquid pool, and the other end is connected to the reflux cooling pipe. One end of the reflux cooling pipe is connected to the cooling pipe, and the other end is connected back to the cooling liquid pool, forming a cooling liquid flow path between the cooling liquid pool, the cooling pipe and the reflux cooling pipe.

[0019] The coolant pool can be a box that stores coolant and is placed on one side of the charging pile. A pump is used to make the coolant flow from one side of the charging pile along the cooling pipe to the charging end and then flow back through the reflux cooling pipe to form a coolant flow path.

[0020] A further improvement is that the inner wall of the cooling tube is provided with a plurality of grooves, the grooves protruding from the outer wall of the cooling tube, and the slider is placed in the grooves. The grooves are evenly spaced along the axial direction of the cooling tube, and each groove can be provided with a butterfly swing device. The grooves on each cross section are arranged in a cross shape, and the slider is placed in two symmetrical grooves, and the central axis rods of two adjacent butterfly swing devices are arranged in a cross shape.

[0021] The beneficial effects of the present invention are:

[0022] 1. A cooling tube containing liquid coolant is used inside the cable. The conductor is arranged inside the cooling tube. A wing device is provided on the conductor. When the liquid flows, the wings can be driven to swing, thereby driving the conductor to swing. The purpose is to increase the fluidity of the liquid inside the conductor, increase the heat dissipation inside the conductor, and increase the current carrying capacity through the swing of the conductor.

[0023] 2. There are fixing clips on the wings, which are in the shape of a cross with the wings to ensure that the conductor will not contact the tube wall when swinging, thereby ensuring the safety of the tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the overall cross-section of the cable.

[0026] Figure 2 Schematic diagram of the central axis and wing structure.

[0027] Figure 3 This is a schematic diagram of the left wing structure.

[0028] Figure 4 This is a schematic diagram of the right wing structure.

[0029] Figure 5 Schematic diagram of the cooling pipe structure.

[0030] Figure 6 Schematic diagram of the fixing clip structure.

[0031] Figure 7 Schematic diagram of the cross-section structure of the cooling pipe.

[0032] Figure 8 It is a schematic diagram of the structure of the slide block and the limiting swing claw.

[0033] In the figure, 1-sheath; 2-insulating layer; 3-non-woven fabric; 4-conductor; 5-braided layer; 6-cooling tube; 7-filler; 8-semicircular slide block; 9-limiting swing claw; 10-central axis rod; 11-wings; 12-fixing clip; 13-semicircular groove; 14-mounting hole; 15-thread; 16-screw fixing hole. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0035] The structure of the present invention uses a double-layer co-extrusion structure. A specific embodiment is as follows: Figure 1 As shown, the cable core comprises an outer sheath 1 and an inner sheath. Several of the cable cores are then covered with extruded nonwoven fabric 3 and sheath 1, with fillers 7 positioned between the cores. The cable cores include power cable cores, signal and control cable cores, and power cable cores. The power cable core, from the inside out, comprises a conductor 4, a braided layer 5, and a cooling tube 6. The signal and control cable core comprises a conductor and an insulation layer. The power cable core, from the inside out, comprises a conductor, filler 7, and nonwoven fabric 3.

[0036] The conductor uses a multi-strand metal conductor, each strand of which can be composed of multiple copper monofilaments. The advantages are: good bending performance, swing resistance and not easy to shrink the core.

[0037] The power line conductor in the power cable core is 35 square and below: Take 35 square as an example:

[0038] The 35 square conductor uses 1121 / 0.2 (bare copper BS or tinned copper TS). The first step is to bundle and twist 19 strands, each strand is 59 / 0.2, twisted to the left, with a lay length of 35-45mm, and a mold of 1.9mm. The second step is to twist the strands in a 1+6+12 arrangement, twisted to the left, with a lay length of 200~210mm, and a mold of 7.5mm. The diameter of the stranded conductor is 7.5~7.6mm. Arrangement structure see Figure 1 Conductor resistance test: ambient temperature 22 degrees, sample length 1 meter, test instrument: digital resistance meter, test result: 0.485Ω, the test result is less than the standard 0.554Ω, the result is qualified.

[0039] The equipment used in the above process is a 650 type wire bundler in the first step and a 19-disc type retractable twist cage stranding machine in the second step.

[0040] A copper braid is braided around the stranded conductors (35 square meters). The material used is bare copper or tinned copper wire, with a braid density of no less than 80%. 24 spindles are used, with 7 to 10 strands per spindle. The single wire diameter is 0.15mm, and the braid pitch is 30 to 45mm. The braiding is designed to hold the conductors together and facilitate insertion into empty pipes. When threading the conductor through the pipe, the braid can be directly tied together. As the braid is pulled, it tightens, firmly binding the conductor.

[0041] The equipment used in the above process is a 24-spindle knitting machine.

[0042] Signal and control line conductors in the signal and control cable core:

[0043] The 0.75 square conductor uses 45 / 0.15 (bare copper BS or tinned copper TS) + 10 / 0.23 (copper foil) + 1 / 1500D (Kevlar), arranged in a 5+11+17+23 configuration: 5 (1 / 1500D (Kevlar) + 1 / 0.23 + 3 / 0.15) + 11 (3 / 0.23 + 8 / 0.15) + 17 (6 / 0.23 + 11 / 0.15) + 23 / 0.15. The die is 1.7mm, and the stranded outer diameter is 1.5mm. The lay direction is left-handed, with a lay pitch of 20-25mm. Adding Kevlar in the center of the conductor and copper foil between each layer helps increase overall strength and service life.

[0044] The equipment used in the above process is the 650 type wire bundler

[0045] Signal and control line extrusion:

[0046] The insulation is made of natural TPE material with a temperature range of -40°C to 125°C, a hardness of 80A, and a thickness of 0.5-0.7mm. During extrusion, a 2% PE masterbatch is added to the natural material. For example, for a blue core wire, the mixture is natural TPE material plus 2% blue masterbatch. The signal and control wires have 7 cores, with insulation colors of orange, brown, gray, red, black, blue, and green. The extrusion die uses a 1.7mm inner die and a 2.8mm outer die; the die is an extrusion type. The extruder is a 70-type extruder with temperatures set as: eye die temperature 205°C, die head temperature 200°C, die neck temperature 205°C, zone 4 temperature 200°C, zone 3 temperature 190°C, zone 2 temperature 180°C, zone 1 temperature 170°C, and drying hopper temperature 70°C. During extrusion, the insulation is tested with a 6KV spark tester to check for defects. Insulation wire diameter testing: Vernier caliper, testing method according to GB / T 2951.11-2008, 8.3: 2.71, 2.75, 2.74, 2.73, 2.75, 2.75, 2.73. Insulation core thickness testing: Tools, projector, testing method according to GB / T 2951.11-2008, 8.1: 0.65, 0.68, 0.63, 0.65, 0.67, 0.67, 0.65; meet the requirements.

[0047] Voltage withstand test: Sample length 5 meters, immersed in water for 1 hour, water temperature 20 degrees, AC voltage withstand 1.5KV / 5MIN, the result is no breakdown.

[0048] Cabling: As shown in the figure, with a pitch of 100-120 mm and a left-hand twisting direction, using a Model 800 cantilever single-twisting machine, the cores are arranged in the order of blue, brown, black, gray, and white. The outermost layer is wrapped with a non-woven fabric (thickness * width) of 0.06 x 32 mm. Two 3000D diameter PP ropes are padded between the five cores to maintain the roundness of the cable.

[0049] The power cable conductor in the power cable core adopts 4 square:

[0050] The 4.0 sq. m conductor uses 224 / 0.15 (bare copper BS or tinned copper TS) + 21 / 0.23 (copper foil) + 7 / 1500D (Kevlar), arranged in a 1+6 arrangement, with 7 strands, each strand consisting of 32 / 0.15 + 1 / 1500D (Kevlar) + 3 / 0.23 (copper foil). The die is 1.1 mm thick, and the finished outer diameter is 0.98 mm. The lay direction is left-handed, with a lay pitch of 15-20 mm. The 7-strand stranding method uses a 3.3 mm die, with a finished outer diameter of 3.1 mm. The lay direction is left-handed, with a lay pitch of 50-60 mm.

[0051] Kevlar and copper foil are evenly added to each of the seven conductor strands, which helps to increase the overall stress and extend the service life.

[0052] The equipment used in the above process is the 650 type wire bundler

[0053] The insulation is made of natural TPE material with a hardness of 80A and a thickness of 1.0mm. During extrusion, a 2% PE masterbatch is added to the natural material. The wire has two cores, and the insulation colors are red and black. The extrusion die uses a 3.3mm inner die and a 4.4mm outer die; the die is extrusion-type. The extruder is a 70-type extruder with temperatures set at: eye die 205°C, die head 200°C, die neck 205°C, zone 4 200°C, zone 3 190°C, zone 2 180°C, zone 1 170°C, and drying hopper 70°C. During extrusion, the insulation is tested with a 6KV spark tester to check for defects. The wire diameter is inspected using a vernier caliper according to 8.3, 5.11, 5.15, 5.14, 5.13, and 5.15 of GB / T 2951.11-2008. Insulation core wire thickness test: Tools, projector, and test method are in accordance with 8.1 of GB / T 2951.11-2008. The results are as follows: 1.01, 1.03, 1.02, 1.02, 1.03; in compliance with the requirements.

[0054] Voltage withstand test: Sample length 5 meters, immersed in water for 1 hour, water temperature 20 degrees, AC voltage withstand 2.5KV / 5MIN, the result is no breakdown.

[0055] Cooling tube: Extruded from PTFE, the material boasts a hardness exceeding 90A, a heat resistance of 250°C, and excellent chemical resistance. Available in two sizes: The inner wall of the cooling tube is provided with several grooves, protruding from the outer wall. The sliders are positioned within these grooves. The grooves are evenly spaced along the axis of the cooling tube, each housing a butterfly swing mechanism. The grooves on each cross section are arranged in a cross pattern, with the sliders positioned in two symmetrical grooves. The central axis rods of two adjacent butterfly swing mechanisms are arranged in a cross pattern.

[0056] 1. Inner diameter D1 = 24mm, outer diameter D2 = 36mm. This diameter tube is provided with a semicircular groove 13, the semicircular diameter D = 7.0mm, and a rolling shaft and a limiting plate mounting hole 14. The hole diameter is 2.5mm larger than the shaft. The shape is as follows: Figure 5 .

[0057] 2. Inner diameter 6mm, outer diameter 8mm, extrusion temperature: eye die temperature 400 degrees, head temperature 380 degrees, neck temperature 380 degrees, zone 4 temperature 370 degrees, zone 3 temperature 350 degrees, zone 2 320 degrees, zone 1 temperature 280 degrees, drying hopper temperature 70 degrees, specification 1 mold inner mold 15mm, outer mold 20mm, specification 2 mold inner mold 6mm, outer mold 8mm.

[0058] Solvent resistance test: Test equipment, aging box, take 300mm sample, immerse it in a beaker filled with silicone oil, place it in a 300 degree aging box, after 240 hours, visually check that there are no cracks on the surface and perform a 5KV / 1MIN withstand voltage test without breakdown. The result is passed.

[0059] Life test: The test equipment is a swing machine, with a lifting weight of 500G, an angle of ±90 degrees, a frequency of 30 times / minute, and a swing requirement of no less than 30,000 times. Then a voltage withstand test of 2.5KV / 1MIN is performed without breakdown. The result is passed.

[0060] Rolling test: The test equipment is a pressure testing machine, the sample length is 3000mm, the running speed is 10mm / min, the weight is 11KN, and after rolling 10,000 times, a pressure resistance test of 2.5KV / 1MIN is performed without breakdown. The result is passed.

[0061] Cabling: Use two 36mm OD tubes and one 8mm OD tube. Pitch 300-400mm, left-hand orientation. Use 1+6 / 1250 backtwist device, arranged in the order shown. Use six 8000D filler ropes to ensure roundness.

[0062] The sheath is made of natural TPE material with a hardness of 80A and a thickness of 3.5mm in orange. The extrusion die is 73mm for the inner die and 80mm for the outer die. The extruder is a 100-type extruder. The extruder temperatures are set as follows: eye die temperature 208°C, die head temperature 205°C, die neck temperature 210°C, zone 4 temperature 205°C, zone 3 temperature 193°C, zone 2 temperature 182°C, zone 1 temperature 170°C, and drying hopper temperature 70°C. During extrusion, the sheath is tested for defects using an 8KV spark tester. The sheath wire diameter is inspected using a vernier caliper according to 8.3 of GB / T 2951.11-2008, measuring 80.5, 80.6, 80.8, 80.1, and 80.3. Sheath thickness test: Tools, projector, and test method are in accordance with 8.1 of GB / T 2951.11-2008. The results are as follows: 3.71, 3.78, 3.72, 3.77, and 3.75, which meet the requirements.

[0063] The cable core includes a twisted conductor layer, a braided layer, a coolant layer and a cooling tube from the inside to the outside. Several butterfly swing devices are placed on the outer edge of the braided layer along the length direction of the cable. The butterfly swing device includes a semicircular slide block 8, a limiting swing claw 9, a central axis rod 10, wings 11 and a fixing clamp 12.

[0064] 1. Semicircular chute blocks, two, such as Figure 8Made of PTFE, the semicircular diameter D3 is 4.0mm. A threaded hole with a diameter D4 of 1.8mm is located in the center of the semicircular chute. Two swing-restricting plates are located 0.6mm above and below the threaded hole. Each plate has three restraining claws, each 5mm wide (H), with arm lengths of 9 and 6mm. They form a 5-10 degree angle with the semicircular chute. The claws are 3mm wide, with 1mm teeth, and a 1mm spacing between each claw. The spacing between the claws reduces fluid flow resistance and also acts as a buffer against the vibration of the wings. The claws are asymmetrical in length (two lengths, L = 9 and 6mm, on the same block), and each claw features a 0.2-0.9mm chamfer at the end. The swing plates prevent the semicircular chute from rotating freely within the slot and limit the swing amplitude of the wings.

[0065] 2. Wings, two, consisting of left and right wings, such as Figure 2-4 As shown, the material is PTFE, with a length of H = 12mm, widths L1 = 6.5mm, L3 = 5.5mm. The left wing has L4 = 1mm and L5 = 0.5mm. L4 and L5 function to restrain the wing's position on the central axis. Where it contacts the edge of the tube, it forms a wing-shaped bend with a 45-degree angle a1 to prevent collision with the tube wall. There is a bend at L2 = 6mm on the underside of the wing, with an angle a of 120 degrees. The left and right bends are opposite angles. At the tail of the wing, there is a circular hole with a diameter of 2.2mm. The two opposite bends allow the conductor to oscillate continuously under the action of the wing. At the head of the wing, there is a diversion angle with a length of L6 of 4mm and an angle a2 of 45 degrees. The diversion angle structure serves the following purposes: 1. It reduces resistance to liquid flow and 2. It opposes the force generated by the rear of the wing, allowing the wing to oscillate continuously.

[0066] 3. Middle axis rod: two, made of stainless steel, 10mm long, 1.8mm in diameter, with a screw at one end, thread length 2.0mm, and the other end fixed to the middle of the fixing clamp with a riveted structure.

[0067] 4. Fixing clip: one, made of pure copper, length L7 is 20mm, L8 is 7mm, threads 15 and screw fixing holes 16 are evenly distributed on both ends of the fixing clip, the hole diameter is 2.0mm, the total width of the end face is 6.0mm, there is a fillet L9 of 2.0mm at both ends, and the inner surface of the middle part of the fixing clip is evenly distributed in S shape, such as Figure 6 and Figure 7 As shown, the function is to increase the friction between the fixing clamp and the copper wire. The fixing clamp and the central axis form a "cross" structure, which can fix the position of the conductor in different directions. The rounded corners at the end are not easy to damage the tube.

[0068] Butterfly swing device, install one set every 30CM.

[0069] Finished product testing:

[0070] Conductor surface temperature test point Conductor surface temperature rise (℃) Pipe wall surface temperature test point Pipe wall surface temperature rise (℃) 1 55.2 1 43.1 2 54.8 2 42.5 3 56.2 3 43.8 4 55.6 4 43.2

[0071] Conductor surface temperature test point Conductor surface temperature rise (℃) Pipe wall surface temperature test point Pipe wall surface temperature rise (℃) 1 45.2 1 46.1 2 45.7 2 45.9 3 46.1 3 46.7 4 45.8 4 45.8

[0072] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, the above is only a preferred embodiment of the present invention. Since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited to this. Any technical personnel familiar with this technical field is within the technical scope disclosed by the present invention. For ordinary technical personnel in this technical field, changes or replacements that can be easily thought of should be covered within the protection scope of the present invention without departing from the principle of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A high-current new energy vehicle charging cable, comprising a double-layer co-extrusion structure formed by multiple cable cores and extruded sheaths, wherein the cable cores include a power cable core, a signal and control cable core, and a power cable core, characterized in that: The power cable core includes, from the inside out, a power line twisted conductor layer, a braided layer, a coolant layer, and a cooling tube, wherein the cooling tube is provided with flowing coolant; a plurality of butterfly swing devices are placed on the outer edge of the braided layer along the length direction of the cable, and the butterfly swing device includes a slide block, a limit swing claw, a central axis rod, wings, and a fixing clamp; The chute block is a semicircular structure, with an internal threaded hole in the middle of the semicircular chute block, and limiting swing plates are fixed above and below the threaded hole, and each limiting swing plate is fixed with a number of limiting claws; The fixing clamp is clamped on the braided layer and includes two clamping bodies. A cavity is formed in the center of the two clamping bodies for fixing the braided layer and the conductor layer. Fixing holes are respectively provided on both end surfaces of the clamping bodies. The two clamping bodies are fixed together through the fixing holes. There are two central shafts, each fixed to the outside of the middle of the fixing clamp. One end of the central shaft is fixed to the outside of the fixing clamp by a riveting structure, and the other end is inserted into the internal threaded hole in the middle of the semicircular slide block. The fixing clamp and the central shaft form a cross structure. The wings are a pair and are respectively fixed on two central shafts.

2. The high-current new energy vehicle charging cable according to claim 1, characterized in that: In the chute block, three limiting claws are fixed on each limiting swing plate, the limiting swing plate forms an angle of 5-10 degrees with the semicircular chute block, and a gap is left between two adjacent limiting claws.

3. The high-current new energy vehicle charging cable according to claim 1 or 2, characterized in that: The end of the limiting claw has a circular chamfer of 0.2-0.

9.

4. The high-current new energy vehicle charging cable according to claim 1 or 2, characterized in that: The lengths of the swing limiting plates on both sides of the central shaft are asymmetric.

5. The high-current new energy vehicle charging cable according to claim 1, characterized in that: The inner surface of the middle cavity of the fixing clip is evenly distributed with S-shaped patterns.

6. The high-current new energy vehicle charging cable according to claim 1, characterized in that: A first bending point is provided at the outer edge of the wing near the inner wall of the cooling tube, and the bending angle is 45 degrees with the central axis.

7. The high-current new energy vehicle charging cable according to claim 6, characterized in that: The bottom surface of the wing is provided with a second bending point with a bending angle of 120 degrees, and the bending points of the two wings are in opposite directions.

8. The high-current new energy vehicle charging cable according to claim 1, characterized in that: A circular hole is provided at the tail of the wing, and a 45-degree diversion angle is provided at the head of the wing.

9. The high-current new energy vehicle charging cable according to claim 1, characterized in that: A reflux cooling pipe is also extruded inside the sheath, one end of the cooling pipe is connected to the cooling liquid pool, and the other end is connected to the reflux cooling pipe. One end of the reflux cooling pipe is connected to the cooling pipe, and the other end is connected back to the cooling liquid pool, forming a cooling liquid flow path between the cooling liquid pool, the cooling pipe and the reflux cooling pipe.

10. The high-current new energy vehicle charging cable according to claim 1, characterized in that: A plurality of grooves are provided on the inner wall of the cooling pipe, the grooves protrude from the outer wall of the cooling pipe, and the sliding blocks are placed in the grooves.

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