Liquid cooling charging cable for electric vehicle and production device thereof

Abstract

The invention relates to the technical field of liquid cooling charging cables, in particular to a liquid cooling charging cable for an electric vehicle and a production device thereof, and the liquid cooling charging cable comprises main wire cores, signal wire cores, a cooling pipeline, auxiliary control wire cores, a filler, a wrapping tape, a grounding wire core, auxiliary power wire cores and an outer sheath. The filling inside the wrapping tape not only has the effects of filling gaps and stabilizing the structure, but also can buffer external pressure and protect the internal wire cores; the three signal wire cores, the two auxiliary power wire cores, the auxiliary control wire core and the grounding wire core are integrated, so that the cable can realize multiple functions of signal transmission, auxiliary power supply, control, grounding protection and the like while realizing electric energy transmission, and the comprehensive performance of the cable is improved; the double-layer protection structure of the wrapping tape and the outer sheath further enhances the mechanical performance and the protection performance of the cable, and the outer sheath is subjected to extrusion molding and processing of a cooling shaping device, so that the surface of the outer sheath is smoother, the size is more stable, the cable can adapt to complex use environments, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled charging cables, and in particular to a liquid-cooled charging cable for electric vehicles and a production device thereof. Background Art

[0002] With the rapid development of the electric vehicle industry, demand for liquid-cooled charging cables is growing. Liquid-cooled charging cables can effectively solve the heat dissipation problem during high-power charging, ensuring charging safety and efficiency. Liquid-cooled charging cables are designed specifically for electric vehicle charging. Through an internal coolant circulation system, they effectively control the heat generated by the cable during operation, thereby preventing overheating that could cause performance degradation or safety accidents.

[0003] Existing liquid-cooled charging cable cooling and shaping devices generally have the following problems: First, the mold specifications are single and cannot be quickly switched to adapt to cables of different diameters, resulting in low production efficiency; second, the sealing structure mostly adopts rigid extrusion, which is easy to damage the cable surface, and the sealing effect is poor, and the vacuum environment is difficult to maintain, affecting the cooling effect; third, the cooling system has low heat exchange efficiency and lacks a precise control mechanism, making it difficult to ensure the uniformity and stability of cable cooling and shaping, which in turn affects product quality.

[0004] To this end, we propose a liquid-cooled charging cable for electric vehicles and a production device thereof. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a liquid-cooled charging cable for electric vehicles and a production device thereof, which are used to solve the above-mentioned technical defects.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A liquid-cooled charging cable for electric vehicles, comprising: a main core, a signal core, a cooling pipe, an auxiliary control core, a filling, a tape, a grounding core, an auxiliary power core and an outer sheath, wherein four main cores are arranged inside the outer sheath, and the four main cores are distributed at equal angles about the central axis of the outer sheath; a cooling pipe is provided on one side of the four main cores, and the four main cores and the four cooling pipes are arranged alternately with each other; a tape is wrapped around the outer circumference of the four main cores, and a filling is provided inside the tape; three signal cores are further provided inside the filling and on one side of the main core and the cooling pipe, two auxiliary power cores are provided inside the filling, and an auxiliary control core and a grounding core are further provided on one side of the filling, respectively; the outer circumference of the tape is extruded with an outer sheath by an extruder, and the outer sheath is processed by a cooling and shaping device after extrusion.

[0007] Preferably, a production device based on a liquid-cooled charging cable for electric vehicles includes a cooling and forming device, the cooling and forming device includes a mounting frame, the top of the mounting frame is provided with a processing through groove, a mold-changing rotating frame is rotatably provided inside the mounting frame, and a mold-changing servo motor for driving the mold-changing rotating frame to rotate is fixedly provided on the back of the mounting frame; servo electric cylinders are fixedly provided on all four sides of the interior of the mold-changing rotating frame, and control frames are fixedly provided on the driving ends of the servo electric cylinders on all four sides, and a cooling mold is provided on one side of the control frame.

[0008] Preferably, the cooling mold consists of two matching modules, and the interior of the two matching modules is provided with a semicircular groove, the bottom of the two matching modules is fixedly provided with an adjusting thread block, the top of the control frame is provided with an adjusting groove matching the adjusting thread block, and a rotating screw is provided for rotating inside the adjusting groove, a control servo motor for driving the rotating screw to rotate is fixedly provided on one side of the control frame, and external threads with opposite rotation directions are respectively provided on both sides of the surface of the rotating screw, the surface of the rotating screw is respectively connected to the internal threads of the two adjusting thread blocks, and the surfaces of the two adjusting thread blocks are both slidably connected to the inside of the adjusting groove.

[0009] Preferably, several sealing connecting frames are fixedly provided on both sides of the interior of the two mating modules, and sealing gaskets are fixedly provided inside the several sealing connecting frames; micro electric cylinders are fixedly provided on both sides of the interior of the two mating modules, and cooling heat exchange plates are fixedly provided on the driving ends of the micro electric cylinders on both sides, and several cooling heat exchange plates are provided inside the two mating modules, and the radius of the several mating modules is the same as the radius of the sealing gasket; the radius of the sealing connecting frames, sealing gaskets and cooling heat exchange plates inside the four cooling modules gradually increases.

[0010] Preferably, a circulating heat exchange channel is further provided inside the cooling heat exchange plate, and elastic connecting tubes are provided on both sides of the circulating heat exchange channel, the bottom end of the elastic connecting tube extends to the inside of the control frame, and cooling medium circulation pipes are provided around the inside of the mold changing rotating frame, and the bottom ends of the four elastic connecting tubes are fixedly connected to the top ends of the four cooling medium circulation pipes respectively.

[0011] Preferably, two cooling medium guide rings are fixedly provided on the front of the mold changing rotary frame, and cooling material receiving ports are also fixedly provided on the front of the two cooling medium guide rings. One end of the cooling medium circulation pipe located inside the mold changing rotary frame is connected to the interior of the two cooling medium guide rings.

[0012] Preferably, a vacuum pump is fixedly provided on the front of the mounting frame, and a vacuum air guide frame is fixedly provided on the front side of the interior of the mounting frame, a rotating air guide ring is rotatably provided inside the vacuum air guide frame, and the interior of the rotating air guide ring is connected with the interior of the vacuum air guide frame, and the interior of the rotating air guide ring is also connected with four vacuum exhaust pipes, and one end of the four vacuum exhaust pipes is respectively connected with the interior of the four cooling molds.

[0013] Preferably, the working method of the production device of the liquid-cooled charging cable for electric vehicles includes the following steps:

[0014] The liquid-cooled charging cable with an extruded sheath enters the device from the processing slot on the top of the mounting frame. The mold-changing servo motor drives the mold-changing rotary frame to rotate and move the cooling mold that adapts to the cable specifications to the processing position;

[0015] The servo motor is controlled to start, driving the screw to rotate, and the external thread with opposite rotation direction drives the adjusting thread block, so that the two matching modules of the cooling mold slide relative to each other along the adjusting groove until they tightly cover the cable surface;

[0016] The staggered sealing connection frames and elastic sealing pads form a labyrinth sealing structure, which reduces the pressure on the cable surface and prevents gas leakage. The vacuum pump is used to evacuate the interior of the cooling mold through the vacuum guide frame, rotating air guide ring and vacuum exhaust pipe, accelerating heat dissipation and improving surface quality.

[0017] The micro electric cylinder drives the cooling heat exchange plate to fit the cable. The cooling medium flows into the cooling medium guide ring through the cooling material connection port, and then enters the circulating heat exchange flow channel inside the cooling heat exchange plate through the cooling medium circulation pipe and the elastic connecting conduit. It flows in the opposite direction to the cable conveying, realizing efficient heat exchange and completing cooling and shaping.

[0018] The electric control valve controls the opening and closing of the vacuum exhaust pipe, and the position of the cooling heat exchange plate is adjusted by the micro electric cylinder to accurately control the cooling process to meet different production needs.

[0019] Compared with the existing technology, it has the following beneficial effects:

[0020] 1. By alternating four main cores distributed at equal angles with cooling pipes, when the cable transmits large current, the cooling pipes can remove the heat generated by the main cores through circulating coolant, effectively preventing overheating and ensuring charging safety and efficiency; the filling inside the tape not only fills the gaps and stabilizes the structure, but also buffers external pressure and protects the internal cores; the integrated setting of three signal cores, two auxiliary power cores, auxiliary control cores and grounding cores allows the cable to perform multiple functions such as signal transmission, auxiliary power supply, control and grounding protection while realizing power transmission, thereby improving the comprehensive performance of the cable; the double-layer protective structure of the tape and outer sheath further enhances the mechanical properties and protective performance of the cable. The outer sheath is processed by extrusion molding and cooling shaping device to make its surface smoother and its size more stable, which can adapt to complex use environment and extend the service life of the cable.

[0021] 2. The circulating heat exchange channel in the cooling heat exchange plate is connected to the cooling medium circulation pipe through an elastic connecting conduit, realizing countercurrent heat exchange in the opposite direction of the cooling medium and the cable transmission direction, greatly improving the heat exchange efficiency. The sealing components of the four cooling molds have a gradient radius change to adapt to cables of different specifications and expand the scope of application of the device. Specifically, the elastic connecting conduit allows the cooling mold to maintain continuous circulation of the cooling medium during movement, avoiding pipeline distortion. The rotating seal design of the cooling medium guide ring and the cooling material connection port ensures uninterrupted operation of the cooling system during mold changes.

[0022] 3. The interior of the four cooling molds is evacuated through one end of the four vacuum exhaust pipes in conjunction with the vacuum air guide frame and the rotating air guide ring. In addition, the interior of the four vacuum exhaust pipes is equipped with an electric control valve. The vacuum pump evacuates the interior of the cooling mold through the vacuum air guide frame, the rotating air guide ring and the vacuum exhaust pipe, which not only accelerates heat dissipation, but also eliminates minor defects on the cable surface and improves the quality of the finished product. Specifically, the electric control valve independently controls each vacuum exhaust pipe, combined with the micro electric cylinder to adjust the position of the cooling heat exchange plate, to achieve precise control of the cooling process and adapt to different production process requirements.

[0023] Other features and advantages of the present invention will be set forth in the following description and, in part, will become apparent from the description or will be understood through implementation of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of a liquid-cooled charging cable structure for an electric vehicle according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the cooling and shaping device structure according to an embodiment of the present invention;

[0026] Figure 3Schematic diagram of the mounting frame and mold-changing rotating frame structure according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the mold-changing rotating frame and cooling mold structure according to an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of a cooling mold and a control frame structure according to an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of the mold-changing rotating frame, cooling material receiving port and cooling medium guide ring structure according to an embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the internal structure of the control frame and cooling mold according to an embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the control frame, adjusting screw block and cooling mold structure according to an embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the cooling heat exchange plate and circulating heat exchange channel structure according to an embodiment of the present invention.

[0033] In the figure, 1. main line core; 2. signal line core; 3. cooling pipe; 4. auxiliary control line core; 5. filling; 6. wrapping tape; 7. grounding line core; 8. auxiliary power line core; 9. outer sheath; 10. mounting frame; 11. processing slot; 12. mold changing servo motor; 13. mold changing rotating frame; 14. cooling mold; 15. vacuum pump; 16. vacuum air guide frame; 17. rotating air guide ring; 18. cooling material connection port; 19. cooling medium guide ring; 20. cooling medium circulation pipe; 21. servo electric cylinder; 22. control frame; 23. adjustment slot; 24. rotating screw; 25. control servo motor; 26. elastic connecting conduit; 27. sealing connecting frame; 28. micro electric cylinder; 29. ​​cooling heat exchange plate; 30. circulating heat exchange channel; 31. adjusting thread block; 32. vacuum exhaust pipe. 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] Example 1

[0036] See also Figures 1 to 9As shown, a liquid-cooled charging cable for electric vehicles includes: a main core 1, a signal core 2, a cooling pipe 3, an auxiliary control core 4, a filling 5, a wrapping tape 6, a grounding core 7, an auxiliary power core 8 and an outer sheath 9. Four main cores 1 are arranged inside the outer sheath 9, and the four main cores 1 are distributed at equal angles about the central axis of the outer sheath 9; a cooling pipe 3 is provided on one side of the four main cores 1, and the four main cores 1 and the four cooling pipes 3 are arranged alternately with each other. A wrapping tape 6 is wrapped around the outer circumference of the four main cores 1, and a filling 5 is provided inside the wrapping tape 6. Three signal cores 2 are further provided inside the filling 5 and on one side of the main core 1 and the cooling pipe 3. Two auxiliary power cores 8 are provided inside the filling 5, and an auxiliary control core 4 and a grounding core 7 are also provided on one side of the filling 5. The outer circumference of the wrapping tape 6 is extruded with an outer sheath 9 by an extruder, and the outer sheath 9 is processed by a cooling and shaping device after extrusion.

[0037] In a specific embodiment, four main cores 1 distributed at equal angles are alternately arranged with cooling pipes 3, so that when the cable transmits large current, the cooling pipes 3 can take away the heat generated by the main cores 1 through circulating coolant, effectively preventing overheating and ensuring charging safety and efficiency; the filling 5 inside the wrapping tape 6 not only fills the gaps and stabilizes the structure, but also buffers external pressure and protects the internal cores; the integrated setting of three signal cores 2, two auxiliary power cores 8, auxiliary control cores 4 and grounding cores 7 allows the cable to perform multiple functions such as signal transmission, auxiliary power supply, control and grounding protection while realizing electric energy transmission, thereby improving the comprehensive performance of the cable; the double-layer protective structure of the wrapping tape 6 and the outer sheath 9 further enhances the mechanical properties and protective performance of the cable. The outer sheath 9 is processed by extrusion molding and cooling and shaping devices to make its surface smoother and its size more stable, so that it can adapt to complex use environments and extend the service life of the cable.

[0038] Example 2

[0039] A production device for liquid-cooled charging cables for electric vehicles includes a cooling and shaping device. The cooling and shaping device includes a mounting frame 10, a processing slot 11 being provided on the top of the mounting frame 10, a mold-changing rotary frame 13 being rotatably provided inside the mounting frame 10, and a mold-changing servo motor 12 being fixedly provided on the back of the mounting frame 10 for driving the mold-changing rotary frame 13 to rotate; servo electric cylinders 21 are fixedly provided on all four sides of the mold-changing rotary frame 13, and control frames 22 are fixedly provided on the driving ends of the servo electric cylinders 21 on all four sides, and a cooling mold 14 is provided on one side of the control frame 22; Specifically, positioning pins and sensors are set between the mold changing rotating frame 13 and the mounting frame 10 to ensure that the cooling mold 14 is accurately aligned after switching, so as to avoid affecting the cable cooling effect due to position deviation; the cooling mold 14 adopts copper alloy or aluminum alloy with excellent thermal conductivity to improve cooling efficiency; at the same time, its surface is plated with hard chrome or ceramic coating to enhance wear resistance and corrosion resistance, thereby extending the service life of the mold; the mold changing servo motor 12 drives the mold changing rotating frame 13 to rotate, and cooperates with the cooling molds 14 evenly distributed on all sides to quickly switch cooling molds of different specifications to meet the production needs of multiple types of cables and significantly improve production efficiency. The cooling mold 14 is composed of two mating modules, and the interior of the two mating modules is provided with a semicircular groove, the bottom of the two mating modules is fixedly provided with an adjusting thread block 31, the top of the control frame 22 is provided with an adjusting groove 23 that cooperates with the adjusting thread block 31, and the interior of the adjusting groove 23 is provided with a rotating screw 24, and one side of the control frame 22 is fixedly provided with a control servo motor 25 for driving the rotating screw 24 to rotate, and the two sides of the surface of the rotating screw 24 are respectively provided with external threads with opposite rotation directions, the surfaces of the rotating screw 24 are respectively connected to the internal threads of the two adjusting thread blocks 31, and the surfaces of the two adjusting thread blocks 31 are both slidably connected to the interior of the adjusting groove 23.

[0040] It should be noted that when performing the cooling treatment for the production of liquid-cooled charging cables, one end of the liquid-cooled charging cable with the extruded sheath is passed through the two mating modules, and the output shaft of the servo motor 25 is used to control the rotating screw 24 to rotate clockwise. The rotating screw 24 is used in conjunction with the two adjusting threaded blocks 31 to drive the two cooling molds 14 to slide relative to each other until the opposite sides of the two mating modules are in contact, thereby sealing and covering both sides of the surface of the liquid-cooled charging cable. Subsequently, the interior of the cooling mold 14 is vacuumed to further improve the cooling and shaping effect of the liquid-cooled charging cable.

[0041] Furthermore, a plurality of sealing connection frames 27 are fixedly provided on both sides of the interior of the two mating modules, and a sealing gasket is fixedly provided inside the plurality of sealing connection frames 27; wherein, the material of the sealing gasket inside the sealing connection frame 27 is silicone rubber or fluororubber, and the plurality of sealing connection frames 27 are staggered on both sides of the mating module, and the two sealing connection frames 27 close to the inner side of the cooling mold 14 are mirror-set. The surface of the liquid-cooled charging cable is sealed by a combination of a labyrinth-type sealing structure and an elastic sealing material through the staggered plurality of sealing connection frames 27. The elastic sealing material does not directly squeeze the cable over a large area. The multi-stage annular grooves and protrusions of the labyrinth-type structure first block the large Part of the gas, the elastic sealing material only plays the role of auxiliary sealing and filling small gaps, and the actual contact pressure is relatively small. Finally, two mirror-set sealing connecting frames 27 and sealing gaskets are used to seal both sides of the surface of the liquid-cooled charging cable, thereby forming a vacuum chamber inside the cooling mold 14; specifically, the servo motor 25 is controlled to drive the rotating screw 24, and the adjusting thread block 31 is driven by the oppositely rotating threads to make the two matching modules accurately closed, so as to achieve adaptive covering of cables with different diameters. The staggered sealing connecting frames 27 and the elastic sealing gaskets form a labyrinth seal, which effectively prevents vacuum leakage while reducing the pressure on the cable surface and ensures the cooling effect.

[0042] Furthermore, micro-electric cylinders 28 are fixedly provided on both sides of the interior of the two mating modules, and cooling heat exchange plates 29 are fixedly provided on the driving ends of the micro-electric cylinders 28 on both sides. There are several cooling heat exchange plates 29 located inside the two mating modules, and the radius of the several mating modules is the same as the radius of the sealing gasket; the radii of the sealing connecting frame 27, the sealing gasket and the cooling heat exchange plate 29 inside the four cooling molds 14 are gradually increased to cooperate with liquid-cooled charging cables of different sizes for sealing, covering and cooling and shaping.

[0043] Furthermore, a circulating heat exchange channel 30 is provided inside the cooling heat exchange plate 29, and elastic connecting conduits 26 are provided on both sides of the circulating heat exchange channel 30; specifically, temperature sensors and flow sensors are provided in the circulating heat exchange channel 30 of the cooling medium circulation pipe 20 and the cooling heat exchange plate 29 to monitor the flow rate and temperature of the cooling medium in real time and adjust the control system to ensure that cables of different specifications can obtain the best cooling effect. The bottom end of the elastic connecting conduit 26 extends to the inside of the control frame 22, and cooling medium circulation pipes 20 are provided on all sides of the inside of the mold changing rotating frame 13. The bottom ends of the four elastic connecting conduits 26 are fixedly connected to the top ends of the four cooling medium circulation pipes 20 respectively; two cooling medium guide rings 19 are fixedly provided on the front of the mold changing rotating frame 13, and the front faces of the two cooling medium guide rings 19 are also fixedly provided with cooling material receiving ports 18. One end of the cooling medium circulation pipe 20 located inside the mold changing rotating frame 13 is connected to the inside of the two cooling medium guide rings 19; specifically, the cooling heat exchange The circulating heat exchange channel 30 in the plate 29 is connected to the cooling medium circulation pipe 20 through the elastic connecting conduit 26, realizing countercurrent heat exchange in the opposite direction of the cooling medium and the cable transmission direction, greatly improving the heat exchange efficiency. The sealing component radius of the four cooling molds 14 changes gradually, adapting to cables of different specifications and expanding the scope of application of the device. Specifically, the elastic connecting conduit 26 allows the cooling mold 14 to maintain continuous circulation of the cooling medium during movement to avoid pipeline distortion. The rotating seal design of the cooling medium guide ring 19 and the cooling material connection port 18 ensures uninterrupted operation of the cooling system during mold change.

[0044] It should be noted that the two cooling medium guide rings 19 are respectively the feed ring and the discharge ring of the cooling medium. The cooling medium circulation pipe 20 cooperates with the elastic connecting conduit 26 to circulate the cooling medium on both sides of the cooling heat exchange plate 29, so that the cooling medium inside the cooling heat exchange plate 29 flows in the opposite direction of the liquid-cooled charging cable, and then uses the cooling medium to cool and shape the surface of the liquid-cooled charging cable. Since the flow direction of the cooling medium is opposite to the conveying direction of the liquid-cooled charging cable, the liquid-cooled charging cable is cooled and shaped quickly and efficiently by cooling media at different temperature stages.

[0045] Specifically, a vacuum pump 15 is fixedly installed on the front of the mounting frame 10, and a vacuum air guide frame 16 is fixedly installed on the front side of the interior of the mounting frame 10. A rotating air guide ring 17 is rotatably installed inside the vacuum air guide frame 16, and the interior of the rotating air guide ring 17 is connected to the interior of the vacuum air guide frame 16. The interior of the rotating air guide ring 17 is also connected to four vacuum exhaust pipes 32, and one end of the four vacuum exhaust pipes 32 is respectively connected to the interior of the four cooling molds 14. The interior of the four cooling molds 14 is evacuated by evacuating one end of the four vacuum exhaust pipes 32 in conjunction with the vacuum air guide frame 16 and the rotating air guide ring 17, and the interior of the four vacuum exhaust pipes 32 is provided with an electric control valve. The vacuum pump 15 evacuates the interior of the cooling mold 14 through the vacuum air guide frame 16, the rotating air guide ring 17 and the vacuum exhaust pipes 32, which not only accelerates heat dissipation, but also eliminates minor defects on the surface of the cable and improves the quality of the finished product. Specifically, the electric control valve independently controls each vacuum exhaust pipe 32, combined with the position adjustment of the cooling heat exchange plate 29 by the micro electric cylinder 28, to achieve precise control of the cooling process and adapt to different production process requirements.

[0046] Example 3

[0047] Specifically, this embodiment further discloses a working method of a production device for a liquid-cooled charging cable for electric vehicles, including the following steps:

[0048] The liquid-cooled charging cable with an extruded sheath enters the device from the processing slot 11 on the top of the mounting frame 10. The die-changing servo motor 12 drives the die-changing rotating frame 13 to rotate, and the cooling die 14 adapted to the cable specifications is moved to the processing position;

[0049] The servo motor 25 is controlled to start, driving the rotating screw 24 to rotate, and the adjusting screw block 31 is driven by the external thread with opposite rotation direction, so that the two matching modules of the cooling mold 14 slide relative to each other along the adjusting groove 23 until they tightly cover the cable surface;

[0050] The staggered sealing connection frames 27 and elastic sealing pads form a labyrinth seal structure, which reduces the pressure on the cable surface and prevents gas leakage. The vacuum pump 15 is used to evacuate the interior of the cooling mold 14 through the vacuum guide frame 16, the rotating air guide ring 17 and the vacuum exhaust pipe 32, thereby accelerating heat dissipation and improving surface quality.

[0051] The micro-electric cylinder 28 drives the cooling heat exchange plate 29 to fit the cable. The cooling medium flows into the cooling medium guide ring 19 through the cooling material connection port 18, and then enters the circulating heat exchange flow channel 30 in the cooling heat exchange plate 29 through the cooling medium circulation pipe 20 and the elastic connecting pipe 26. The cooling medium flows in the opposite direction to the cable conveying, achieving efficient heat exchange and completing cooling and shaping.

[0052] The electric control valve controls the on and off of the vacuum exhaust pipe 32, and the position of the cooling heat exchange plate 29 is adjusted by the micro electric cylinder 28 to accurately control the cooling process to meet different production needs.

[0053] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0054] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled charging cable for electric vehicles, characterized in that: include: A main core (1), a signal core (2), a cooling pipe (3), an auxiliary control core (4), a filling (5), a wrapping tape (6), a grounding core (7), an auxiliary power core (8) and an outer sheath (9), wherein four main cores (1) are arranged inside the outer sheath (9), and the four main cores (1) are arranged at equal angles with respect to the central axis of the outer sheath (9); a cooling pipe (3) is arranged on one side of each of the four main cores (1), and the four main cores (1) and the four cooling pipes (3) are arranged alternately with each other, and the four main cores (1) are arranged at equal angles with respect to the central axis of the outer sheath (9). A wrapping tape (6) is wound around the outer circumference, and a filler (5) is provided inside the wrapping tape (6). Three signal cores (2) are provided inside the filler (5) and on one side of the main core (1) and the cooling pipe (3). Two auxiliary power cores (8) are provided inside the filler (5), and an auxiliary control core (4) and a grounding core (7) are provided on one side of the filler (5). An outer sheath (9) is formed on the outer circumference of the wrapping tape (6) by extrusion molding, and the outer sheath (9) is processed by a cooling and shaping device after extrusion molding.

2. A production device for a liquid-cooled charging cable for an electric vehicle according to claim 1, characterized in that: The production device comprises a cooling and shaping device, wherein the cooling and shaping device comprises a mounting frame (10), a processing through groove (11) is provided on the top of the mounting frame (10), a mold changing rotating frame (13) is rotatably provided inside the mounting frame (10), and a mold changing servo motor (12) for driving the mold changing rotating frame (13) to rotate is fixedly provided on the back of the mounting frame (10); servo electric cylinders (21) are fixedly provided on all four sides of the interior of the mold changing rotating frame (13), and control frames (22) are fixedly provided on the driving ends of the servo electric cylinders (21) on all four sides, and a cooling mold (14) is provided on one side of the control frame (22).

3. The production device of a liquid-cooled charging cable for electric vehicles according to claim 2, characterized in that: The cooling mold (14) is composed of two matching modules, and the interiors of the two matching modules are both provided with semicircular grooves, and the bottoms of the two matching modules are fixedly provided with adjusting thread blocks (31), and the top of the control frame (22) is provided with an adjusting groove (23) that matches the adjusting thread block (31), and the interior of the adjusting groove (23) is provided with a rotating screw (24), and a control servo motor (25) for driving the rotating screw (24) to rotate is fixedly provided on one side of the control frame (22), and the two sides of the surface of the rotating screw (24) are respectively provided with external threads with opposite rotation directions, and the surfaces of the rotating screw (24) are respectively connected to the internal threads of the two adjusting thread blocks (31), and the surfaces of the two adjusting thread blocks (31) are both slidably connected to the interior of the adjusting groove (23).

4. The production device of a liquid-cooled charging cable for electric vehicles according to claim 3, characterized in that: Several sealing connection frames (27) are fixedly provided on both sides of the interior of the two matching modules, and sealing gaskets are fixedly provided inside the several sealing connection frames (27); micro electric cylinders (28) are fixedly provided on both sides of the interior of the two matching modules, and cooling heat exchange plates (29) are fixedly provided at the driving ends of the micro electric cylinders (28) on both sides, and several cooling heat exchange plates (29) are provided inside the two matching modules, and the radius of the several matching modules is the same as the radius of the sealing gasket; the radius of the sealing connection frames (27), sealing gaskets and cooling heat exchange plates (29) inside the four cooling modules (14) increases one by one.

5. The production device of a liquid-cooled charging cable for electric vehicles according to claim 4, characterized in that: A circulating heat exchange channel (30) is further provided inside the cooling heat exchange plate (29), and elastic connecting conduits (26) are provided on both sides of the circulating heat exchange channel (30), the bottom end of the elastic connecting conduit (26) extends to the inside of the control frame (22), and cooling medium circulation pipes (20) are provided around the inside of the mold changing rotating frame (13), and the bottom ends of the four elastic connecting conduits (26) are fixedly connected to the top ends of the four cooling medium circulation pipes (20) respectively.

6. The production device of a liquid-cooled charging cable for electric vehicles according to claim 5, characterized in that: Two cooling medium guide rings (19) are fixedly provided on the front of the mold-changing rotary frame (13), and cooling material receiving ports (18) are also fixedly provided on the front of the two cooling medium guide rings (19). One end of the cooling medium circulation pipe (20) located inside the mold-changing rotary frame (13) is connected to the interior of the two cooling medium guide rings (19).

7. The production device of a liquid-cooled charging cable for electric vehicles according to claim 6, characterized in that: A vacuum pump (15) is fixedly provided on the front of the mounting frame (10), and a vacuum air guide frame (16) is fixedly provided on the front side of the interior of the mounting frame (10). A rotating air guide ring (17) is rotatably provided inside the vacuum air guide frame (16), and the interior of the rotating air guide ring (17) is connected to the interior of the vacuum air guide frame (16). The interior of the rotating air guide ring (17) is also connected to four vacuum exhaust pipes (32), and one end of the four vacuum exhaust pipes (32) is respectively connected to the interior of the four cooling molds (14).

8. The production device of a liquid-cooled charging cable for electric vehicles according to claim 7, characterized in that: The working method of the production device of the liquid-cooled charging cable for electric vehicles includes the following steps: The liquid-cooled charging cable with the extruded sheath enters the device from the processing slot (11) on the top of the mounting frame (10), and the die-changing servo motor (12) drives the die-changing rotating frame (13) to rotate, and the cooling die (14) adapted to the cable specifications is turned to the processing position; The servo motor (25) is controlled to start, driving the rotating screw (24) to rotate, and the adjusting thread block (31) is driven by the external thread with the opposite rotation direction, so that the two matching modules of the cooling mold (14) slide relatively along the adjusting groove (23) until the surface of the cable is tightly covered; The staggered sealing connection frame (27) and the elastic sealing pad form a labyrinth sealing structure, which reduces the pressure on the cable surface and prevents gas leakage. The vacuum pump (15) is used to evacuate the interior of the cooling mold (14) through the vacuum guide frame (16), the rotating air guide ring (17) and the vacuum exhaust pipe (32), thereby accelerating heat dissipation and improving surface quality. The micro-electric cylinder (28) drives the cooling heat exchange plate (29) to fit the cable, and the cooling medium flows into the cooling medium guide ring (19) through the cooling material connection port (18), and enters the circulating heat exchange flow channel (30) in the cooling heat exchange plate (29) through the cooling medium circulation pipe (20) and the elastic connecting conduit (26), and flows in the opposite direction to the cable transportation, thereby achieving efficient heat exchange and completing cooling and shaping; The electric control valve controls the on-off of the vacuum exhaust pipe (32), and the position of the cooling heat exchange plate (29) is adjusted by the micro electric cylinder (28) to accurately control the cooling process and adapt to different production requirements.

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