Intelligent early warning new energy charging pile liquid cooling cable and preparation method

Abstract

The application discloses a kind of intelligent early warning new energy charging pile liquid cooling cable and preparation method, belong to liquid cooling cable technical field, including from inside to outside center optical fiber unit, conducting unit, shielding layer, sheath layer, center optical fiber unit is arranged in the center position of cable section, for monitoring temperature and stress change in the process of cable operation;Conducting unit is arranged in the circumferential distribution around center optical fiber unit;Conducting unit center is provided with liquid cooling oil pipe, gap is provided with liquid cooling oil pipe, and liquid cooling oil pipe conducting unit carries out liquid cooling heat dissipation;Shielding layer is arranged outside conducting unit, and sheath layer is arranged outside shielding layer.By the application, center optical fiber unit can perceive temperature change, stress change and abnormal bending state in the process of cable operation, when local overheating, local pressure or deformation anomaly caused by repeated bending occurs in the process of large current charging of cable, center optical fiber unit can output monitoring signal in time.

Description

Technical Field

[0001] This invention relates to a liquid-cooled cable for intelligent early warning new energy charging piles and its preparation method, belonging to the field of liquid-cooled cable technology. Background Technology

[0002] Liquid-cooled cables for new energy charging piles are widely used in high-power charging connection scenarios between new energy vehicles and charging piles, especially suitable for high current-carrying conditions such as fast charging and supercharging. Because these cables typically require frequent plugging and unplugging, repeated bending, and dragging during use, and are often exposed to outdoor environments for extended periods, they not only need excellent conductivity and heat dissipation capabilities, but also high flexibility, abrasion resistance, weather resistance, and certain safety monitoring capabilities to meet the high-frequency, high-power, and long-term operation requirements of new energy charging piles.

[0003] In existing new energy charging pile cables, liquid cooling structures are widely used to improve current carrying capacity, typically by incorporating liquid cooling channels within the cable. However, existing liquid-cooled cables still have several shortcomings: Many current products lack real-time monitoring of temperature, stress, and abnormal conditions, making it difficult to detect potential hazards such as overheating, overload, or mechanical damage in a timely manner, resulting in insufficient safety warning capabilities; the internal structure of the cable is relatively complex, with a large overall weight, insufficient flexibility and maneuverability, which can place a significant burden on operators during insertion, removal, and use; under long-term repeated bending and dragging conditions, the internal conductors, liquid cooling channels, and connection points are prone to fatigue damage, posing risks of breakage, leakage, or insulation wear, and their service life still needs improvement; under high current carrying conditions, heat dissipation efficiency is insufficient, and heat accumulation is significant.

[0004] Therefore, it is necessary to provide an intelligent early warning liquid-cooled cable for new energy charging piles and its preparation method to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide an intelligent early warning liquid-cooled cable for new energy charging piles and its preparation method, which solves the problems of insufficient detection methods, poor controllability, large bending radius and easy wear, and insufficient heat dissipation efficiency under high current conditions of traditional cables.

[0006] The technical problem to be solved by this invention is achieved by the following technical solution: a liquid-cooled cable for intelligent early warning new energy charging piles. include From the inside out, it consists of a central fiber optic unit, a conductive unit, a shielding layer, and a sheath layer. The central optical fiber unit is located at the center of the cable cross-section and is used to monitor temperature and stress changes during cable operation; At least two sets of the conductive units are arranged circumferentially around the central optical fiber unit. Each conductive unit includes multiple conductors that are twisted together and have a cladding layer on the outside. A liquid cooling oil pipe is provided at the center of the conductive unit and at the gaps between the conductive units. The liquid cooling oil pipe is used to transport the cooling medium to perform liquid cooling heat dissipation on the conductive unit. The shielding layer is disposed on the outside of the conductive unit, and the shielding layer includes a copper strip layer. The sheath layer is disposed on the outside of the shielding layer, and the sheath layer is made of TPU.

[0007] Preferably, the conductive unit is provided in four groups, and the four groups of conductive units are evenly arranged along the central optical fiber axis.

[0008] Preferably, the conductor includes an oxygen-free copper wire bundle and a bulletproof wire, wherein the oxygen-free copper wire bundle and the bulletproof wire are arranged by twisting together.

[0009] Preferably, the liquid cooling oil pipe is made of polytetrafluoroethylene (PTFE).

[0010] Preferably, the wrapping layer is formed by overlapping polyester tape, with an overlap rate of not less than 50%.

[0011] Preferably, the copper strip layer is provided in a continuous coating manner.

[0012] A method for preparing a liquid-cooled cable for an intelligent early warning new energy charging pile, preferably comprising the following steps: S1. Prepare the central optical fiber unit; S2. Prepare multiple conductive units, arrange conductors on the outside of the liquid cooling oil pipe, and surround the conductors with a cladding layer. S3. The central optical fiber unit is placed at the center of the cable, and multiple conductive units are assembled circumferentially around the central optical fiber unit. Liquid cooling oil pipes are placed between adjacent conductive units. S4. A shielding layer is provided on the outside of the conductive unit; S5. Extruding and molding a TPU sheath on the outside of the shielding layer; S6. Perform liquid cooling channel sealing test and fiber optic early warning function test on the finished cable.

[0013] Preferably, in step S3, the conductive unit is in four groups, and the four groups of conductive units are evenly arranged around the central optical fiber unit.

[0014] The beneficial effects of this invention are: This invention, by setting a central optical fiber unit located at the center of the cable cross-section and extending continuously along the cable axis, achieves real-time monitoring of the cable's operating status. The central optical fiber unit can sense temperature changes, stress changes, and abnormal bending conditions during cable operation. When the cable experiences localized overheating, localized pressure, or abnormal deformation due to repeated bending during high-current charging, the central optical fiber unit can promptly output monitoring signals, providing a data basis for subsequent early warning.

[0015] This invention, by setting the conductive units into multiple circumferentially uniformly arranged structures and using a spirally twisted arrangement of multiple conductors within each conductive unit, achieves the effects of improved cable flexibility, enhanced maneuverability, and reduced insertion and removal burden. The uniform distribution of multiple conductive units around the central optical fiber unit allows for a more balanced stress distribution across the cable cross-section, reducing bending resistance caused by unilateral accumulation. The stranded conductor structure makes the cable more flexible overall, dispersing stress during bending and reducing cable bending stiffness, thus making insertion, removal, dragging, and retraction easier for operators.

[0016] This invention achieves efficient liquid cooling and improved current-carrying capacity by placing liquid cooling oil pipes at the center of the conductive unit and further arranging them between adjacent conductive units. Specifically, with the liquid cooling oil pipes positioned at the center of the conductive unit, the cooling medium can directly act on the core heating area of ​​the conductor, shortening the heat transfer path. Further arrangement of liquid cooling oil pipes between adjacent conductive units creates multi-point distributed cooling channels, allowing heat to be carried away simultaneously from multiple directions, thereby improving heat dissipation uniformity, reducing conductor operating temperature, and minimizing resistance increases and insulation aging caused by high temperatures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] In the diagram: 1-Central fiber optic unit, 21-Conductor, 22-Liquid cooling oil pipe, 23-Wrapping layer, 3-Shielding layer, 4-Sheath layer. Detailed Implementation

[0019] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments. Example 1

[0020] like Figure 1 As shown, a smart early warning liquid-cooled cable for new energy charging piles includes a central optical fiber unit 1, a conductive unit, a shielding layer 3, and a sheath layer 4 arranged from the inside out.

[0021] The central fiber optic unit 1 is located at the center of the cable cross-section and extends continuously along the cable axis. The central fiber optic unit 1 is used to monitor the changes in temperature and stress during cable operation. It is constructed by combining a fiber optic sensing core with an external protection structure. It is used to sense the internal temperature rise, stress state and abnormal bending of the cable in real time, so as to issue an early warning in time when overheating, overload or mechanical damage tends to occur.

[0022] At least two sets of conductive units are arranged circumferentially around the central optical fiber unit 1. Each conductive unit includes multiple conductors 21, which are twisted together and have a wrapping layer 23 on the outside. A liquid cooling oil pipe 22 is also provided at the center of the conductive unit.

[0023] A liquid cooling oil pipe 22 is provided in the gap between the conductive units. The liquid cooling oil pipe 22 can transport the cooling medium to perform liquid cooling heat dissipation on the conductive units.

[0024] The shielding layer 3 is disposed on the outside of the conductive unit, and the shielding layer 3 includes a copper strip layer. The sheath layer 4 is disposed on the outside of the shielding layer 3, and the sheath layer 4 is made of TPU.

[0025] Reference Figure 1 The central fiber optic unit 1 is located at the center of the cable cross-section and extends continuously along the cable axis. The central fiber optic unit 1 is used to monitor the changes in temperature and stress during the operation of the cable, and to sense the internal temperature rise, stress state and abnormal bending conditions of the cable in real time, so as to issue early warnings in time when overheating, overload or mechanical damage tends to occur.

[0026] In this embodiment, the central optical fiber unit 1 is composed of a single distributed optical fiber sensing core or a fiber Bragg grating sensing core. A protective sleeve is provided on the outside of the optical fiber sensing core to improve its resistance to compression, bending, and tension. This ensures the central optical fiber unit 1's resistance to compression, bending, and tension during cabling and long-term use.

[0027] The central optical fiber unit 1 of the cable is connected to the external monitoring system through the signal acquisition terminal. When the cable is powered on, the conductor heats up or the cable bends and deforms. The central optical fiber unit 1 changes temperature or strain synchronously with the cable. The optical fiber sensing core converts this change into optical signal parameter changes and transmits them to the external monitoring system to realize real-time monitoring of the entire length of the cable.

[0028] At least two sets of conductive units are circumferentially distributed around the central optical fiber unit 1. Each conductive unit includes multiple conductors 21, which are twisted together and have a wrapping layer 23 on their outer side. A liquid cooling oil pipe 22 is also provided at the center of the conductive unit, which can transport a cooling medium to provide liquid cooling for the conductive unit. Preferably, there are four sets of conductive units, which are evenly arranged along the axis of the central optical fiber unit 1. The included angles between the four sets of conductive units are equal, so that the cable cross-section is subjected to balanced stress and is less likely to bulge on one side or local stress concentration when bending. Each set of conductive units is an independent current transmission unit, and its cross-section is preferably an approximately circular bundle structure. Multiple conductors 21 are circumferentially twisted around the liquid cooling oil pipe 22, which is located at the center.

[0029] In this embodiment, the liquid cooling oil pipe 22 is located at the center inside each conductive unit 21, and liquid cooling oil pipes are also provided in the gaps between adjacent conductive units 21. With this arrangement, the cooling medium can be closer to the heat-generating area of ​​the conductor, so that heat can be carried away simultaneously from the inside of the conductor and between adjacent conductors, thereby improving the overall heat exchange efficiency and reducing the operating temperature of the conductor.

[0030] The liquid cooling oil pipe 22 is installed along the axial direction of the cable. The liquid cooling oil pipe 22 can be made of polytetrafluoroethylene material, which has the characteristics of high temperature resistance, corrosion resistance, and strong chemical stability. It can adapt to the long-term circulation of cooling medium and will not crack, age or leak due to temperature changes or medium corrosion.

[0031] In this embodiment, the liquid cooling oil pipe 22 is a hollow tubular structure with a smooth inner wall and an outer diameter that matches the internal structure of the conductive unit. The liquid cooling oil pipe 22 includes an inlet end, a flow channel, and an outlet end. Multiple liquid cooling oil pipes 22 can be connected in parallel or in series to form a circulation loop.

[0032] The external liquid cooling system drives the cooling medium to circulate within the liquid cooling oil pipe 22. The cooling medium enters the flow channel from the inlet end and is then discharged from the outlet end. During the flow process, the cooling medium absorbs and carries away the heat generated by the conductor 21, thereby transferring heat from the inside of the cable to the external system.

[0033] The above structure forms a multi-channel cooling network, which allows the cooling medium to cover the main heat-generating areas, thereby reducing the thermal gradient and improving the uniformity of heat dissipation.

[0034] In this embodiment, the conductor 21 includes an oxygen-free copper wire bundle and a bulletproof wire, which are arranged by twisting. The oxygen-free copper wire bundle is used to ensure conductivity and low resistance loss, while the bulletproof wire is used to improve the tensile strength, impact resistance, and fatigue resistance of the conductive unit 21, so that the conductive unit 21 is not prone to wire breakage, loosening, or local deformation during frequent bending, dragging, and insertion / removal.

[0035] During the stranding process of conductors 21, multiple conductors 21 are arranged around the liquid cooling oil pipe 22, which makes the conductor cross-section more uniformly stressed. At the same time, a stable center position is reserved for the liquid cooling oil pipe 22 to ensure that the liquid cooling channel is not easily shifted during long-term use.

[0036] A wrapping layer 23 is provided on the outer side of the conductor 21. In this embodiment, the wrapping layer 23 is formed by overlapping polyester tape, with an overlap rate of not less than 50%. This wrapping layer 23 is used to cover and fix the internal conductor and liquid cooling oil pipe 22, preventing relative displacement during cable bending, vibration, or thermal expansion. The wrapping layer 23 also serves as insulation and buffer protection, reducing mechanical friction and electrical interference between conductors and between the conductor and the outer structure, and helps to reduce the outer diameter of the cable core, improving the compactness of the cable. In this embodiment, the polyester tape wrapping can be done in a double-layer or multi-layer overlapping manner, forming a continuous, dense, and somewhat elastic covering layer on the outside of the cable core after wrapping, thereby enhancing the stability of the internal structure.

[0037] In this embodiment, four sets of conductive units are arranged evenly along the axis of the central optical fiber unit 1. A liquid-cooled oil pipe 22 is disposed at the center of each conductive unit 21, extending along the cable axis to transport a cooling medium for liquid cooling of the conductive unit 21. In this embodiment, the liquid-cooled oil pipe 22 is made of polytetrafluoroethylene (PTFE), which has good high-temperature resistance, corrosion resistance, and chemical stability, thus adapting to the long-term cyclic use of the charging cable. The liquid-cooling medium is preferably an insulating coolant or a coolant with high specific heat capacity. When circulating within the liquid-cooled oil pipe 22, it directly carries away the heat generated by the conductor, thereby reducing the conductor temperature rise and increasing the cable's current-carrying capacity.

[0038] In this embodiment, liquid cooling oil pipes 22 are disposed at the center inside each conductive unit 21 and also in the gaps between adjacent conductive units 21 to form a multi-point distributed cooling channel. By providing multiple liquid cooling oil pipes 22, the cooling medium can more fully contact the heat-generating areas inside the cable, improving heat dissipation efficiency, reducing the conductor operating temperature, and thus improving the cable's continuous current carrying capacity and service life. Furthermore, each liquid cooling oil pipe 22 can be connected to an external liquid cooling circulation system through branch connections, parallel connections, or bus connections to deliver the cooling medium to the inside of the cable and recover heat.

[0039] The shielding layer 3 is disposed outside the conductive unit 21. In this embodiment, the shielding layer 3 includes a copper strip layer, which is formed by continuous wrapping. The copper strip layer is spirally wound or overlapped around the outside of the conductive unit along the cable axis to form a continuous closed shielding path. After the copper strip layer is continuously wrapped around the outside of the conductive unit, it can effectively shield the electromagnetic field generated during cable operation, reduce electromagnetic interference to external equipment, and suppress the influence of the external electromagnetic environment on the internal signals and monitoring system of the cable, thereby improving the operational stability and signal reliability of the entire cable. The copper strip layer extends continuously along the length of the cable and is coaxially arranged with the internal structure to form a relatively stable electromagnetic shielding closed loop.

[0040] The sheath layer 4 is disposed outside the copper strip layer. In this embodiment, the sheath layer 4 is made of TPU material. The TPU sheath layer 4 is cylindrical and continuously covers the outermost layer of the cable, providing mechanical and environmental protection for the internal structure. TPU material has the characteristics of wear resistance, oil resistance, weather resistance, tear resistance, and good flexibility, which can adapt to the complex conditions commonly encountered in the outdoor installation environment of new energy charging piles, such as dragging, bending, friction, rain, sun exposure, and low temperature, thereby extending the service life of the cable. Preferably, the sheath layer 4 can be extruded and molded onto the outside of the shielding layer 3 in one step, so that the sheath layer 4 and the shielding layer 3 are tightly bonded to improve the overall strength and protective effect of the outer layer.

[0041] In this embodiment, the central optical fiber unit 1 is located at the center of the cable; four sets of conductive units are evenly arranged around the central optical fiber unit 1; liquid cooling oil pipes 22 are located at the center inside the conductive units 21, and liquid cooling oil pipes 22 are also located in the gaps between adjacent conductive units 21; the wrapping layer 23 is located on the outside of the conductive units 21; the shielding layer 3 covers the outside of the wrapping layer 23; and the sheath layer 4 covers the outside of the shielding layer 3. The coaxial arrangement of the structures forms a complete cable assembly. This structure sequentially realizes monitoring, conductivity, heat dissipation, insulation buffering, electromagnetic shielding, and external protection functions from the inside out. The layers cooperate with each other to ensure the stable operation of the cable under high-power charging conditions.

[0042] The conductive unit 21 is responsible for power transmission. During transmission, some of the electrical energy is converted into heat, which is promptly removed by the cooling medium flowing within the liquid-cooled oil pipe 22. The central optical fiber unit 1 can monitor temperature and stress status in real time. The wrapping layer 23 fixes and insulates the internal structure. The shielding layer 3 suppresses electromagnetic interference. The sheath layer 4 provides wear resistance, protection, and environmental adaptability to the cable's outer surface. Therefore, in actual use of the charging pile, when the cable overheats, experiences abnormal stretching, or is excessively bent, the central optical fiber unit 1 can promptly output early warning information, working in conjunction with the liquid cooling system to reduce temperature rise, thereby reducing the risks of thermal runaway, insulation aging, short circuits, and leakage.

[0043] In this embodiment, the conductive unit 21 includes multiple conductors, which are twisted together to form a bundle-like conductive structure. The conductors include oxygen-free copper wire bundles and ballistic wires, which are arranged by twisting together. Preferably, each conductive unit 21 contains nine conductors, which are distributed circumferentially around the liquid cooling oil pipe 22. The oxygen-free copper wire bundles ensure excellent conductivity and low resistance loss, while the ballistic wires improve the tensile strength and fatigue resistance of the conductive unit 21, thereby enhancing the mechanical reliability of the cable during repeated bending, insertion / removal, and dragging.

[0044] Because new energy charging cables are subject to frequent bending and complex stresses during daily use, the use of stranded structures and reinforcing materials effectively reduces the risks of conductor breakage, loosening, and localized stress concentration, thus improving the short lifespan of traditional liquid-cooled cables under repeated bending conditions. Simultaneously, the stranded conductor bundles offer better flexibility, reducing the overall cable bending stiffness and improving maneuverability and user plugging / unplugging experience.

[0045] In this embodiment, the liquid-cooled oil pipe 22 is used to form a cooling medium circulation channel. When the cooling medium flows within the liquid-cooled oil pipe 22, it can directly carry away the heat generated during the operation of the conductive unit 21. Since the liquid-cooled oil pipe 22 is located at the center inside the conductive unit 21 or in the gap between adjacent conductive units 21, the cooling medium can be closer to the heat source area, resulting in a shorter heat dissipation path and higher heat exchange efficiency. Compared to relying solely on external air cooling or natural heat dissipation, this structure can significantly improve the heat dissipation rate, reduce conductor temperature rise, and thus improve the continuous working capability of the charging cable under high current carrying capacity. In high-power continuous charging scenarios, this liquid-cooled structure can reduce the increase in conductor resistance caused by high temperature, thereby reducing energy loss and improving stability.

[0046] In this embodiment, the central fiber unit 1 can be used to arrange fiber optic sensors to monitor the changes in temperature and stress inside the cable in real time, thereby enabling early identification of conditions such as abnormal temperature rise, mechanical overload, and excessive local bending.

[0047] When heat accumulation or abnormal stress occurs in the cable during use, the central fiber optic unit 1 can promptly feed back relevant signals so that the system can take protective measures such as load reduction, alarm, or shutdown. This reduces the risks of overheating, aging, short circuits, leakage, and fire, thereby improving the safety of the entire charging system. Temperature monitoring can be used to identify conductor temperature rise and abnormal heat dissipation, while stress monitoring can be used to identify repeated bending, pulling, and localized stress changes at joints, thus achieving full-process monitoring of the cable's operating status.

[0048] A method for preparing a liquid-cooled cable for an intelligent early warning new energy charging pile specifically includes the following steps: S1, Prepare the central optical fiber unit 1; The central fiber unit 1 completes the installation, fixation and external protective layer covering of the fiber sensing core, and then arranges it into a central unit that extends continuously along the axial direction so that it remains at the geometric center of the cable during subsequent cabling.

[0049] S2. Prepare multiple conductive units 21 and reserve space for liquid cooling oil pipes 22 between adjacent conductive units 21; Each conductive unit 21 is fabricated by twisting multiple conductors circumferentially to form a bundle structure, and a central through hole or central cavity is reserved during the conductor bundle forming process to accommodate the liquid cooling oil pipe 22; gaps are reserved between adjacent conductive units 21 to accommodate auxiliary liquid cooling oil pipes 22. A polyester tape is provided on the outside of the conductor 21 to form a wrapping layer 23; The polyester tape is continuously wound in a spiral along the cable axis during wrapping, with an overlap rate of not less than 50% between adjacent wrapping layers, thereby forming a continuous and dense insulation and buffer layer on the outer periphery of the cable core.

[0050] S3. Set the central optical fiber unit 1 at the center of the cable, assemble multiple conductive units 21 around the central optical fiber unit 1 in a circumferential manner, and set the liquid cooling oil pipe 22 between adjacent conductive units 21, while forming a liquid cooling channel position in the center of each conductive unit 21. In this embodiment, the conductive units 21 are preferably four groups, and the four groups of conductive units 21 are evenly arranged around the central optical fiber unit 1. During assembly, a positioning frame or cable-forming mold can be used for positioning to ensure that each conductive unit 21 maintains a stable circumferential position and the same cable tension. The liquid cooling oil pipe 22 is inserted or embedded synchronously with the conductive units 21 during the assembly process to ensure that it remains axially continuous within the cable core.

[0051] S4. A copper strip layer is wrapped around the outside of the wrapping layer 23 to form a shielding layer 3; The copper strip layer can be formed into a closed shielding structure by continuous wrapping or spiral overlapping. During the wrapping process, the copper strip layer and the wrapping layer 23 are kept in close contact to improve the shielding uniformity and structural stability.

[0052] S5. TPU sheath layer 4 is extruded and molded on the outside of shielding layer 3; The TPU sheath layer 4 continuously covers the shielding layer 3 during the extrusion process and forms a complete outer sheath after cooling and shaping, thereby improving the wear resistance, weather resistance and tear resistance of the cable's outer surface.

[0053] S6. Perform liquid cooling channel sealing test and fiber optic early warning function test on the finished cable.

[0054] Among them, the liquid cooling channel sealing test is used to verify whether there is leakage, blockage or damage in the liquid cooling oil pipe 22 and its connection parts, and the fiber optic early warning function test is used to verify whether the temperature and stress monitoring signals of the central fiber optic unit 1 are output normally, so as to ensure that the finished cable has stable heat dissipation and intelligent early warning functions.

[0055] In this embodiment, in step S3, there are four sets of conductive units 21, and the four sets of conductive units 21 are evenly arranged around the central optical fiber unit 1 to ensure the structural balance and bending consistency after cabling.

[0056] In this embodiment, in step S4, the overlap rate of the polyester tape is not less than 50% to ensure the insulation, coverage and structural stability of the wrapping layer 23.

[0057] In this embodiment, in step S6, the sheath layer 4 is formed by extrusion, so that the sheath fits tightly with the inner layer structure and improves the outer layer protection effect.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A smart early warning liquid-cooled cable for new energy charging piles, include It consists of a central optical fiber unit, a conductive unit, a shielding layer, and a sheath layer, arranged from the inside out. Its features are: The central optical fiber unit is located at the center of the cable cross-section and is used to monitor temperature and stress changes during cable operation; At least two sets of the conductive units are arranged circumferentially around the central optical fiber unit. Each conductive unit includes multiple conductors that are twisted together and have a cladding layer on the outside. A liquid cooling oil pipe is provided at the center of the conductive unit and at the gaps between the conductive units. The liquid cooling oil pipe is used to transport the cooling medium to perform liquid cooling heat dissipation on the conductive unit. The shielding layer is disposed on the outside of the conductive unit, and the shielding layer includes a copper strip layer. The sheath layer is disposed on the outside of the shielding layer, and the sheath layer is made of TPU.

2. The intelligent early warning liquid-cooled cable for new energy charging piles according to claim 1, characterized in that: The conductive unit is provided in four groups, and the four groups of conductive units are evenly arranged along the central optical fiber axis.

3. The intelligent early warning liquid-cooled cable for new energy charging piles according to claim 1, characterized in that: The conductor includes an oxygen-free copper wire bundle and a bulletproof wire, which are arranged by twisting together.

4. The intelligent early warning liquid-cooled cable for new energy charging piles according to claim 1, characterized in that: The liquid cooling oil pipe is made of polytetrafluoroethylene.

5. The intelligent early warning liquid-cooled cable for new energy charging piles according to claim 1, characterized in that: The wrapping layer is formed by overlapping polyester tapes, with an overlap rate of not less than 50%.

6. The intelligent early warning liquid-cooled cable for new energy charging piles according to claim 1, characterized in that: The copper strip layer is set in a continuous wrapping manner.

7. A method for preparing a liquid-cooled cable for an intelligent early warning new energy charging pile, characterized in that: The method for preparing a liquid-cooled cable for an intelligent early warning new energy charging pile as described in any one of claims 1-6 includes the following steps: S1. Prepare the central optical fiber unit; S2. Prepare multiple conductive units, arrange conductors on the outside of the liquid cooling oil pipe, and surround the conductors with a cladding layer. S3. The central optical fiber unit is placed at the center of the cable, and multiple conductive units are assembled circumferentially around the central optical fiber unit. Liquid cooling oil pipes are placed between adjacent conductive units. S4. A shielding layer is provided on the outside of the conductive unit; S5. Extruding and molding a TPU sheath on the outside of the shielding layer; S6. Perform liquid cooling channel sealing test and fiber optic early warning function test on the finished cable.

8. The method for preparing a liquid-cooled cable for an intelligent early warning new energy charging pile according to claim 7, characterized in that: In step S3, the conductive unit consists of four groups, and the four groups of conductive units are evenly arranged circumferentially along the central optical fiber unit.

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