A liquid-cooled charging cable for electric vehicles and its manufacturing apparatus

Abstract

This invention relates to the field of liquid-cooled charging cable technology, specifically to a liquid-cooled charging cable for electric vehicles and its production apparatus, comprising a main core, signal core, cooling pipe, auxiliary control core, filler, wrapping tape, grounding core, auxiliary power core, and outer sheath. The filler inside the wrapping tape not only fills gaps and stabilizes the structure but also buffers external pressure and protects the internal cores. The integrated arrangement of three signal cores, two auxiliary power cores, auxiliary control cores, and grounding cores allows the cable to perform multiple functions simultaneously, including signal transmission, auxiliary power supply, control, and grounding protection, thus improving the cable's overall performance. The double-layer protective structure of the wrapping tape and outer sheath further enhances the cable's mechanical and protective properties. The outer sheath is processed through extrusion molding and cooling shaping, resulting in a smoother surface, more stable dimensions, adaptability to complex operating environments, and extended cable lifespan.

Description

Technical Field

[0001] This invention relates to the field of liquid-cooled charging cable technology, specifically to a liquid-cooled charging cable for electric vehicles and its production apparatus. Background Technology

[0002] With the rapid development of the electric vehicle industry, the demand for liquid-cooled charging cables is increasing. 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. They effectively control the heat generated during operation through an internal coolant circulation system, thereby preventing overheating that could lead to performance degradation or safety accidents.

[0003] Existing liquid-cooled charging cable cooling and shaping devices generally suffer from the following problems: First, the mold specifications are limited and cannot be quickly switched to adapt to cables of different diameters, resulting in low production efficiency; second, the sealing structure mostly adopts a rigid extrusion method, which is prone to damaging the cable surface and has poor sealing effect, making it difficult to maintain a vacuum environment and 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, thus affecting product quality.

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

[0005] To address the shortcomings of existing technologies, this invention provides a liquid-cooled charging cable for electric vehicles and its production apparatus, thereby resolving the aforementioned technical deficiencies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a liquid-cooled charging cable for electric vehicles, comprising: main conductors, signal conductors, cooling pipes, auxiliary control conductors, filler, wrapping tape, grounding conductors, auxiliary power conductors, and an outer sheath. Four main conductors are arranged inside the outer sheath, and the four main conductors are distributed at equal angles about the central axis of the outer sheath. Cooling pipes are provided on one side of each of the four main conductors, and the four main conductors and four cooling pipes are arranged alternately. A wrapping tape is wrapped around the outer periphery of each of the four main conductors, and filler is provided inside the wrapping tape. Three signal conductors are also provided inside the filler, located on one side of the main conductors and cooling pipes. Two auxiliary power conductors are also provided inside the filler, and auxiliary control conductors and grounding conductors are respectively provided on one side of the filler. The outer periphery of the wrapping tape is extruded into an outer sheath using an extruder, and the outer sheath is processed by a cooling and shaping device after extrusion.

[0007] Preferably, a production apparatus for liquid-cooled charging cables for electric vehicles includes a cooling and shaping device. The cooling and shaping device includes a mounting frame with a processing slot on its top. A mold-changing rotating frame is rotatably mounted inside the mounting frame, and a mold-changing servo motor for driving the mold-changing rotating frame to rotate is fixedly mounted on the back of the mounting frame. Servo cylinders are fixedly mounted on all four sides inside the mold-changing rotating frame, and control frames are fixedly mounted on the drive ends of the servo cylinders on all four sides. A cooling mold is mounted on one side of each control frame.

[0008] Preferably, the cooling mold consists of two mating modules, each with a semi-circular groove inside. An adjusting threaded block is fixedly installed at the bottom of each of the two mating modules. The top of the control frame has an adjusting groove that mates with the adjusting threaded block, and a rotating screw is rotatably installed inside the adjusting groove. A control servo motor for driving the rotating screw is fixedly installed on one side of the control frame, and the rotating screw has external threads with opposite directions on both sides of its surface. The surface of the rotating screw is connected to the internal threads of the two adjusting threaded blocks, and the surfaces of the two adjusting threaded blocks are slidably connected to the inside of the adjusting groove.

[0009] Preferably, several sealing connection frames are fixedly arranged on both sides inside the two mating modules, and sealing gaskets are fixedly arranged inside the several sealing connection frames; micro electric cylinders are fixedly arranged on both sides inside the two mating modules, and cooling heat exchange plates are fixedly arranged at the drive ends of the micro electric cylinders on both sides; several cooling heat exchange plates are arranged 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 connection frames, sealing gaskets and cooling heat exchange plates inside the four cooling molds increase progressively.

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

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

[0012] Preferably, a vacuum pump is fixedly installed on the front of the mounting frame, and a vacuum guide frame is fixedly installed on the front side inside the mounting frame. A rotating guide ring is rotatably installed inside the vacuum guide frame, and the interior of the rotating guide ring is connected to the interior of the vacuum guide frame. The interior of the rotating guide ring is also connected to four vacuum extraction pipes, and one end of each of the four vacuum extraction pipes is connected to the interior of four cooling molds.

[0013] Preferably, the production apparatus for the liquid-cooled charging cable for electric vehicles operates by including the following steps:

[0014] The liquid-cooled charging cable with extruded sheath enters the device through the processing slot at the top of the mounting frame. The die-changing servo motor drives the die-changing rotating frame to rotate, turning the cooling die that matches the cable specification to the processing position.

[0015] The servo motor is started and driven to rotate the lead screw. The external threads with opposite directions drive the adjusting thread block, so that the two mating modules of the cooling mold slide relative to each other along the adjusting groove until they tightly cover the surface of the cable.

[0016] The staggered sealing connection frame and elastic sealing gasket form a labyrinth sealing structure, which reduces the pressure on the cable surface and prevents gas leakage. In conjunction with the vacuum pump, the vacuum guide frame, rotating guide ring and vacuum extraction pipe are used to evacuate the inside of the cooling mold, which accelerates heat dissipation and improves surface quality.

[0017] The miniature electric cylinder drives the cooling heat exchange plate to adhere to the cable. The cooling medium flows into the cooling medium guide ring through the cooling inlet, and enters the circulating heat exchange channel in the cooling heat exchange plate through the cooling medium circulation pipe and the flexible connecting conduit. It flows in the opposite direction to the cable delivery to achieve efficient heat exchange and complete the cooling and shaping.

[0018] Electrically controlled valves control the opening and closing of the vacuum extraction pipe, and combined with miniature electric cylinders to adjust the position of the cooling heat exchange plate, the cooling process is precisely controlled to adapt to different production needs.

[0019] Compared with existing technologies, it has the following advantages:

[0020] 1. By alternating four main conductors distributed at equal angles with cooling pipes, the cooling pipes can remove the heat generated by the main conductors through circulating coolant when the cable transmits high current, effectively preventing overheating and ensuring charging safety and efficiency. The filling inside the wrapping tape not only fills gaps and stabilizes the structure but also buffers external pressure and protects the internal conductors. The integrated arrangement of three signal conductors, two auxiliary power conductors, auxiliary control conductors, and grounding conductors allows the cable to perform multiple functions such as signal transmission, auxiliary power supply, control, and grounding protection while transmitting electrical energy, thus improving the overall performance of the cable. The double-layer protective structure of the wrapping tape and outer sheath further enhances the mechanical and protective properties of the cable. The outer sheath is treated by extrusion molding and cooling shaping, making its surface smoother and its dimensions more stable, enabling it to adapt to complex operating environments and extending the cable's service life.

[0021] 2. The circulating heat exchange channel inside the cooling heat exchange plate is connected to the cooling medium circulation pipe through an elastic connecting conduit, realizing countercurrent heat exchange with the cable conveying direction opposite to that of the cooling medium, which greatly improves the heat exchange efficiency. The sealing components of the four cooling molds have a gradient radius to adapt to different specifications of cables, expanding the applicability of the device. Specifically, the elastic connecting conduit allows the cooling mold to maintain continuous circulation of the cooling medium during movement, avoiding pipe twisting. The rotary sealing design of the cooling medium guide ring and the cooling receiving port ensures that the cooling system works uninterruptedly during mold changing.

[0022] 3. The interior of the four cooling molds is evacuated by using a vacuum guide frame and a rotating guide ring at one end of each of the four vacuum extraction pipes. Each of the four vacuum extraction pipes is equipped with an electrically controlled valve. The vacuum pump evacuates the interior of the cooling molds through the vacuum guide frame, rotating guide ring, and vacuum extraction pipes. This not only accelerates heat dissipation but also eliminates minor defects on the cable surface, improving the quality of the finished product. Specifically, the electrically controlled valves independently control each vacuum extraction pipe, and the position of the cooling heat exchange plate is adjusted by a miniature electric cylinder, achieving precise control of the cooling process and adapting to different production process requirements.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

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

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

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

[0027] Figure 4 This is a schematic diagram of the mold changing rotating frame and cooling mold structure according to an embodiment of the present invention;

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

[0029] Figure 6 This is a schematic diagram of the mold changing rotating frame, cooling inlet, and cooling medium guiding ring structure according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal structure of the control frame and cooling mold in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the control frame, adjusting threaded block, and cooling mold structure according to an embodiment of the present invention;

[0032] Figure 9 This is a 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 diagram, 1. Main wire core; 2. Signal wire core; 3. Cooling pipe; 4. Auxiliary control wire core; 5. Filler; 6. Wrapping tape; 7. Grounding wire core; 8. Auxiliary power supply wire core; 9. Outer sheath; 10. Mounting bracket; 11. Machining slot; 12. Mold changing servo motor; 13. Mold changing rotating frame; 14. Cooling mold; 15. Vacuum pump; 16. Vacuum guide frame; 17. Rotating guide ring; 18. Cooling inlet; 19. Cooling medium guide ring; 20. Cooling medium circulation pipe; 21. Servo cylinder; 22. Control frame; 23. Adjustment slot; 24. Rotating lead screw; 25. Control servo motor; 26. Flexible connecting conduit; 27. Sealing connection frame; 28. Miniature electric cylinder; 29. ​​Cooling heat exchange plate; 30. Circulating heat exchange channel; 31. Adjusting threaded block; 32. Vacuum extraction pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Please see Figures 1 to 9As shown, a liquid-cooled charging cable for electric vehicles includes: a main conductor 1, a signal conductor 2, a cooling pipe 3, an auxiliary control conductor 4, a filler 5, a wrapping tape 6, a grounding conductor 7, an auxiliary power conductor 8, and an outer sheath 9. Four main conductors 1 are located inside the outer sheath 9, and the four main conductors 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 each of the four main conductors 1, and the four main conductors 1 and the four cooling pipes 3 are arranged alternately. A wrapping tape 6 is wrapped around the outer periphery of the four main conductors 1, and a filler 5 is provided inside the wrapping tape 6. Three signal conductors 2 are also provided inside the filler 5, located on one side of the main conductors 1 and the cooling pipes 3. Two auxiliary power conductors 8 are provided inside the filler 5, and an auxiliary control conductor 4 and a grounding conductor 7 are respectively provided on one side of the filler 5. The outer periphery of the wrapping tape 6 is extruded into the outer sheath 9 using an extruder, and the outer sheath 9 is processed by a cooling and shaping device after extrusion.

[0037] In one specific embodiment, by alternating the arrangement of four main conductor cores 1 distributed at equal angles with cooling pipes 3, the cooling pipes 3 can remove the heat generated by the main conductor cores 1 through circulating coolant when the cable transmits high current, 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 conductor cores. The integrated arrangement of three signal conductor cores 2, two auxiliary power conductor cores 8, auxiliary control conductor core 4, and grounding conductor core 7 allows the cable to perform multiple functions such as signal transmission, auxiliary power supply, control, and grounding protection while transmitting electrical energy, thus improving the overall performance of the cable. The double-layer protective structure of the wrapping tape 6 and the outer sheath 9 further enhances the mechanical and protective properties of the cable. The outer sheath 9 is processed by extrusion molding and cooling shaping device, making its surface smoother and its dimensions more stable, enabling it to adapt to complex operating environments and extending the cable's service life.

[0038] Example 2

[0039] A production apparatus for liquid-cooled charging cables for electric vehicles includes a cooling and shaping device. The cooling and shaping device includes a mounting frame 10, with a processing slot 11 on the top of the mounting frame 10. A mold-changing rotating frame 13 is rotatably mounted inside the mounting frame 10, and a mold-changing servo motor 12 for driving the mold-changing rotating frame 13 to rotate is fixedly mounted on the back of the mounting frame 10. Servo cylinders 21 are fixedly mounted on all four sides inside the mold-changing rotating frame 13, and control frames 22 are fixedly mounted on the drive ends of the servo cylinders 21 on all four sides. A cooling mold 14 is mounted on one side of each control frame 22. Specifically, positioning pins and sensors are set between the mold changing rotating frame 13 and the mounting frame 10 to ensure accurate alignment of the cooling mold 14 after switching, avoiding the impact of positional deviation on the cable cooling effect; the cooling mold 14 is made of 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, and extend the service life of the mold; the mold changing servo motor 12 drives the mold changing rotating frame 13 to rotate, and together with the cooling molds 14 evenly distributed around the perimeter, different specifications of cooling molds can be quickly switched to meet the production needs of multiple cable models and significantly improve production efficiency. The cooling mold 14 consists of two mating modules, each with a semi-circular groove inside. Adjusting threaded blocks 31 are fixedly installed at the bottom of each module. The top of the control frame 22 has an adjusting groove 23 that mates with the adjusting threaded blocks 31. A rotating screw 24 is rotatably mounted inside the adjusting groove 23. A control servo motor 25 for driving the rotating screw 24 is fixedly mounted on one side of the control frame 22. The rotating screw 24 has external threads with opposite directions on both sides of its surface. The surfaces of the rotating screw 24 are threadedly connected to the interior threads of the two adjusting threaded blocks 31, and the surfaces of the two adjusting threaded blocks 31 are slidably connected to the interior of the adjusting groove 23.

[0040] It should be noted that during the cooling process in the production of liquid-cooled charging cables, one end of the extruded sheathed liquid-cooled charging cable is passed between two mating modules. The output shaft of the control servo motor 25 is used to control the rotating screw 24 to rotate clockwise. The rotating screw 24, in conjunction with two adjusting threaded blocks 31, drives the two cooling molds 14 to slide relative to each other until the opposite sides of the two mating modules contact each other, thus sealing and covering both sides of the surface of the liquid-cooled charging cable. Then, 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, several sealing connection frames 27 are fixedly installed on both sides of the two mating modules, and sealing gaskets are fixedly installed inside each of the sealing connection frames 27. The sealing gaskets inside the sealing connection frames 27 are made of silicone rubber or fluororubber. The several sealing connection frames 27 are staggered on both sides of the mating modules, with the two sealing connection frames 27 closest to the inner side of the cooling mold 14 being mirrored. The staggered sealing connection frames 27 combine a labyrinthine sealing structure with an elastic sealing material on the surface of the liquid-cooled charging cable. The elastic sealing material does not directly and tightly compress the cable over a large area; instead, the multi-level annular grooves and protrusions of the labyrinthine structure first block large... For some gases, the elastic sealing material only plays an auxiliary role in sealing and filling tiny gaps, with relatively low actual contact pressure. Finally, the two mirror-shaped sealing connecting frames 27 and sealing gaskets are used to seal both sides of the liquid-cooled charging cable surface, thereby forming a vacuum chamber inside the cooling mold 14. Specifically, the servo motor 25 drives the rotating lead screw 24, which drives the adjusting thread block 31 through the opposite screw threads, so that the two mating modules are precisely closed, achieving adaptive wrapping for cables of different diameters. The staggered sealing connecting frames 27 and the elastic sealing gaskets form a labyrinth seal, which reduces the pressure on the cable surface and effectively prevents vacuum leakage, ensuring the cooling effect.

[0042] Furthermore, miniature electric cylinders 28 are fixedly installed on both sides of the interior of the two mating modules, and cooling heat exchange plates 29 are fixedly installed on the drive ends of the miniature electric cylinders 28 on both sides. Several cooling heat exchange plates 29 are installed 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, sealing gasket and cooling heat exchange plate 29 inside the four cooling molds 14 gradually increase to accommodate liquid-cooled charging cables of different sizes and specifications for sealing, covering and cooling 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 installed in the circulating heat exchange channel 30 of the cooling medium circulation pipe 20 and the cooling heat exchange plate 29 to monitor in real time and adjust the flow rate and temperature of the cooling medium through 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 into the interior of the control frame 22, and cooling medium circulation pipes 20 are provided around 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 cooling receiving ports 18 are 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 rotating frame 13 is connected to the interior of the two cooling medium guide rings 19. Specifically, cooling heat exchange The circulating heat exchange channel 30 inside plate 29 is connected to the cooling medium circulation pipe 20 through the elastic connecting conduit 26, realizing countercurrent heat exchange with the cooling medium in the opposite direction to the cable conveying direction, which greatly improves the heat exchange efficiency. The sealing components of the four cooling molds 14 have a gradient radius to adapt to different specifications of cables and expand the applicability of the device. Specifically, the elastic connecting conduit 26 allows the cooling molds 14 to maintain continuous circulation of the cooling medium during movement, avoiding pipe twisting. The rotary sealing design of the cooling medium guide ring 19 and the cooling receiving port 18 ensures that the cooling system works uninterruptedly during mold changing.

[0044] It should be noted that the two cooling medium guide rings 19 are the inlet ring and outlet ring of the cooling medium, respectively. The cooling medium is circulated and transported to both sides inside the cooling heat exchange plate 29 through the cooling medium circulation pipe 20 and the flexible connecting conduit 26. This allows the cooling medium inside the cooling heat exchange plate 29 to flow in the opposite direction to the liquid-cooled charging cable, thereby using 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 transport direction of the liquid-cooled charging cable, the cooling medium at different temperature stages can achieve rapid and efficient cooling and shaping of the liquid-cooled charging cable.

[0045] Specifically, a vacuum pump 15 is fixedly installed on the front of the mounting bracket 10, and a vacuum guide frame 16 is fixedly installed on the front side inside the mounting bracket 10. A rotating guide ring 17 is rotatably installed inside the vacuum guide frame 16, and the interior of the rotating guide ring 17 is connected to the interior of the vacuum guide frame 16. Four vacuum extraction pipes 32 are also connected to the interior of the rotating guide ring 17, and one end of each of the four vacuum extraction pipes 32 is connected to the interior of one of the four cooling molds 14. The interior of the four cooling molds 14 is evacuated by one end of the four vacuum extraction pipes 32 in conjunction with the vacuum guide frame 16 and the rotating guide ring 17. Each of the four vacuum extraction pipes 32 is equipped with an electrically controlled valve. The vacuum pump 15 evacuates the interior of the cooling molds 14 through the vacuum guide frame 16, the rotating guide ring 17 and the vacuum extraction pipes 32. This not only accelerates heat dissipation but also eliminates minor defects on the surface of the cable, improving the quality of the finished product. Specifically, the electrically controlled valves independently control each vacuum extraction pipe 32, and the micro electric cylinder 28 adjusts the position of the cooling heat exchange plate 29 to achieve precise control of the cooling process and adapt to different production process requirements.

[0046] Example 3

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

[0048] The liquid-cooled charging cable with extruded sheath enters the device through the processing slot 11 at the top of the mounting frame 10. The die-changing servo motor 12 drives the die-changing rotating frame 13 to rotate, and rotates the cooling die 14 that matches the cable specification to the processing position.

[0049] The servo motor 25 is started, which drives the rotating screw 24 to rotate. The external threads with opposite directions drive the adjusting screw block 31, so that the two mating modules of the cooling mold 14 slide relative to each other along the adjusting groove 23 until they tightly cover the surface of the cable.

[0050] The staggered sealing connection frame 27 and the elastic sealing gasket form a labyrinth-type sealing structure, which reduces the pressure on the cable surface and prevents gas leakage. In conjunction with the vacuum pump 15, the vacuum guide frame 16, the rotating guide ring 17 and the vacuum extraction pipe 32 are used to evacuate the inside of the cooling mold 14, which accelerates heat dissipation and improves surface quality.

[0051] The miniature 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 inlet 18, and enters the circulating heat exchange channel 30 in the cooling heat exchange plate 29 through the cooling medium circulation pipe 20 and the elastic connecting conduit 26. It flows in the opposite direction to the cable conveying to achieve efficient heat exchange and complete the cooling and shaping.

[0052] The electric control valve controls the opening and closing of the vacuum pumping pipe 32, and the micro electric cylinder 28 adjusts the position of the cooling heat exchange plate 29 to precisely control the cooling process and adapt to different production needs.

[0053] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

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

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

Claims

1. A production apparatus for liquid-cooled charging cables for electric vehicles, characterized in that, The device includes a cooling and shaping apparatus, which includes a mounting frame (10). A machining slot (11) is provided on the top of the mounting frame (10). A mold-changing rotating frame (13) is rotatably mounted inside the mounting frame (10), and a mold-changing servo motor (12) for driving the mold-changing rotating frame (13) to rotate is fixedly mounted on the back of the mounting frame (10). Servo cylinders (21) are fixedly mounted around the inside of the mold-changing rotating frame (13), and control frames (22) are fixedly mounted on the driving ends of the servo cylinders (21) around the inside. A cooling mold (14) is provided on one side of each control frame (22). The mold (14) consists of two mating modules, each with a semi-circular groove inside. An adjusting threaded block (31) is fixedly installed at the bottom of each of the two mating modules. The top of the control frame (22) has an adjusting groove (23) that mates with the adjusting threaded block (31). A rotating screw (24) is rotatably installed inside the adjusting groove (23). A control servo motor (25) for driving the rotating screw (24) is fixedly installed on one side of the control frame (22). External threads with opposite directions are respectively provided on both sides of the surface of the rotating screw (24). The surface of the rotating screw (24) is respectively connected to the two... The internal threads of the adjusting threaded blocks (31) are connected, and the surfaces of the two adjusting threaded blocks (31) are slidably connected to the inside of the adjusting groove (23). Several sealing connection brackets (27) are fixedly arranged on both sides inside the two mating modules, and sealing gaskets are fixedly arranged inside the several sealing connection brackets (27). Miniature electric cylinders (28) are fixedly arranged on both sides inside the two mating modules, and cooling heat exchange plates (29) are fixedly arranged at the driving ends of the miniature electric cylinders (28) on both sides. Several cooling heat exchange plates (29) are arranged inside the two mating modules, and the radius of the several mating modules and the sealing gaskets are fixedly arranged. The radii are the same; the radii of the sealing connecting frame (27), sealing gasket and cooling heat exchange plate (29) inside the four cooling molds (14) increase one by one; the cooling heat exchange plate (29) is also provided with a circulating heat exchange channel (30), and the circulating heat exchange channel (30) is provided with elastic connecting pipes (26) on both sides inside. The bottom end of the elastic connecting pipes (26) extends into the inside of the control frame (22), and the mold changing rotating frame (13) is provided with cooling medium circulation pipes (20) around its perimeter. The bottom ends of the four elastic connecting pipes (26) are fixedly connected to the top ends of the four cooling medium circulation pipes (20) respectively. The above-mentioned production equipment yields a liquid-cooled charging cable for electric vehicles. The liquid-cooled charging cable includes: a main conductor (1), a signal conductor (2), a cooling pipe (3), an auxiliary control conductor (4), a filler (5), a wrapping tape (6), a grounding conductor (7), an auxiliary power conductor (8), and an outer sheath (9). The cable is characterized in that four main conductors (1) are located inside the outer sheath (9), and the four main conductors (1) are arranged at equal angles about the central axis of the outer sheath (9); a cooling pipe (3) is provided on one side of each of the four main conductors (1), and the four main conductors (1) and four cooling pipes... The channels (3) are arranged alternately. The outer periphery of the four main cores (1) is wrapped with a wrapping tape (6), and the wrapping tape (6) is filled with a filler (5). Inside the filler (5) and on one side of the main cores (1) and cooling pipes (3), three signal cores (2) are also provided. Inside the filler (5), two auxiliary power cores (8) are provided. On one side of the filler (5), auxiliary control cores (4) and grounding cores (7) are respectively provided. The outer periphery of the wrapping tape (6) is extruded into an outer sheath (9) by an extruder. The liquid-cooled charging cable is processed by a cooling and shaping device.

2. The production apparatus for a liquid-cooled charging cable for electric vehicles according to claim 1, characterized in that, Two cooling medium guide rings (19) are fixedly provided on the front side of the mold changing rotating frame (13), and a cooling inlet (18) is also fixedly provided on the front side of the two cooling medium guide rings (19). 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).

3. The production apparatus for a liquid-cooled charging cable for electric vehicles according to claim 2, characterized in that, A vacuum pump (15) is fixedly installed on the front of the mounting bracket (10), and a vacuum guide frame (16) is fixedly installed on the front side inside the mounting bracket (10). A rotating guide ring (17) is rotatably installed inside the vacuum guide frame (16), and the interior of the rotating guide ring (17) is connected to the interior of the vacuum guide frame (16). The interior of the rotating guide ring (17) is also connected to four vacuum extraction pipes (32), and one end of each of the four vacuum extraction pipes (32) is connected to the interior of one of the four cooling molds (14).

4. The production apparatus for a liquid-cooled charging cable for electric vehicles according to claim 3, characterized in that, The operation of the production equipment for the liquid-cooled charging cable for electric vehicles includes the following steps: The liquid-cooled charging cable with extruded sheath enters the device through the processing slot (11) at the top of the mounting frame (10). The die-changing servo motor (12) drives the die-changing rotating frame (13) to rotate, and rotates the cooling die (14) that matches the cable specification to the processing position. The servo motor (25) is started, driving the rotating screw (24) to rotate. The external threads with opposite directions drive the adjusting thread block (31), so that the two mating modules of the cooling mold (14) slide relative to each other along the adjusting groove (23) until they tightly cover the surface of the cable. The staggered sealing connection frame (27) and the elastic sealing gasket form a labyrinth sealing structure, which reduces the pressure on the cable surface and prevents gas leakage. In conjunction with the vacuum pump (15), the vacuum guide frame (16), rotating guide ring (17) and vacuum extraction pipe (32) are used to evacuate the inside of the cooling mold (14), which accelerates heat dissipation and improves surface quality. The miniature 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 inlet (18), and enters the circulating heat exchange channel (30) in the cooling heat exchange plate (29) through the cooling medium circulation pipe (20) and the elastic connecting conduit (26). It flows in the opposite direction to the cable delivery to achieve efficient heat exchange and complete the cooling and shaping. The electric control valve controls the opening and closing of the vacuum pumping pipe (32), and the micro electric cylinder (28) adjusts the position of the cooling heat exchange plate (29) to precisely control the cooling process and adapt to different production needs.

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