Special cable for new energy automobile charging pile

Abstract

The invention belongs to the technical field of charging cables, and particularly discloses a special cable for a new energy automobile charging pile, and the cable comprises a plurality of conductors; the insulating sleeve is uniformly sleeved on the outer side of the conductor; the wrapping tape uniformly sleeves the outer sides of the plurality of conductors; the sheath sleeves the outer side of the wrapping tape, a heat dissipation device used for dissipating heat of the plurality of conductors is arranged on the inner side of the sheath, and the heat dissipation device comprises a central flow guide pipe, a heat dissipation guide pipe, a separation assembly and a sealing assembly. According to the invention, through the arrangement of the heat dissipation device, heat generated by the conductor can be transmitted to the cooling liquid in the heat dissipation guide pipe through the central flow guide pipe in the use process of the cable, so that the heat of the conductor is rapidly absorbed by means of heat conduction and convection, and the heat conduction assembly transmits the heat of the heat dissipation guide pipe to the drying pipe; air exchange auxiliary heat dissipation is achieved by combining the design of a sealing assembly filter screen, the problem of high-power charging heating is solved, and insulation performance reduction and conductor attenuation are avoided.

Description

Technical Field

[0001] This invention belongs to the field of charging cable technology, and in particular relates to a special cable for charging piles of new energy vehicles. Background Technology

[0002] In recent years, the global energy structure transformation has accelerated, and electric vehicles, as an important carrier of green transportation, have experienced explosive market growth. With the increasing popularity of electric vehicles, the construction of charging and battery swapping infrastructure has become a core support for the industry's development. Among these, charging piles, as key equipment for daily energy replenishment of electric vehicles, are seeing their number and coverage continue to expand.

[0003] In the use of charging piles, cables, as the core component for power transmission, directly affect charging efficiency and safety. With the increase in electric vehicle battery capacity, high-power charging piles (such as DC fast charging piles) have become mainstream to shorten charging time. Charging power has gradually increased from the early 60kW to 120kW, 200kW, and some ultra-fast charging piles even reach over 480kW. However, a significant problem brought about by high-power charging is the increased heat generation of the cables—according to Joule's law, current passing through a conductor generates heat due to resistance, and the heat is proportional to the square of the current. Existing charging pile cables mostly use traditional structures, relying solely on the sheath for natural heat dissipation, resulting in extremely low heat dissipation efficiency and failing to meet the heat dissipation requirements of high-power charging. Excessive temperature can lead to the following problems: Deterioration of insulation performance: Long-term high temperature will accelerate the aging and cracking of the insulation sleeve, resulting in a decrease in insulation resistance value, and even causing leakage accidents, threatening personal and equipment safety; Conductor performance degradation: High temperatures increase conductor resistance, increase power loss (i.e., "line loss"), reduce charging efficiency, and accelerate conductor oxidation, thus shortening cable lifespan. Significant safety hazards: If the temperature continues to rise, it may ignite flammable materials around the cable and cause a fire, especially in underground garages, enclosed charging compartments and other similar scenarios where the risk is even higher.

[0004] Therefore, the heat dissipation defects of existing charging pile cables have become a key bottleneck restricting the promotion of high-power charging technology. Developing a special cable for new energy vehicle charging piles with an efficient heat dissipation structure that can adapt to high-power charging scenarios has important practical significance and market value.

[0005] Therefore, it is necessary to invent a special cable for new energy vehicle charging piles to solve the above problems. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a dedicated cable for new energy vehicle charging piles, thereby solving one of the issues raised in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a special cable for new energy vehicle charging piles, comprising: A conductor, and the number of said conductors is multiple; An insulating sleeve is evenly fitted over the outside of the conductor; Wrap the tape evenly around the outside of the multiple conductors; A sheath is fitted over the outer side of the wrapping tape, and a heat dissipation device for dissipating heat from multiple conductors is provided on the inner side of the sheath. The heat dissipation device includes a central guide tube, heat dissipation conduits, separating components, and sealing components. The central guide tube is located at the axis of the sheath. There are multiple heat dissipation conduits, which are uniformly fixedly connected to the inner wall of the central guide tube along its length and are filled with coolant. The separating components are evenly distributed in a ring around the outer side of the central guide tube to separate the multiple conductors. There are two sealing components, which are respectively installed at both ends of the sheath.

[0008] Furthermore, the separating assembly includes a separating plate, a support plate, and a connecting pipe. The separating plate has a U-shaped design in its side view, and its length matches the length of the sheath. The two ends of the separating plate in the side view are inclined towards each other. The protruding part in the middle of the separating plate is aligned with and fits against the central guide pipe. The insulating sleeve of the conductor can fit against the side of the separating plate. A filler is uniformly disposed between the outer side of the separating plate and the insulating sleeve of the conductor. There are multiple support plates, which are uniformly disposed on the inner side of the separating plate to support the inner side of the separating plate. Several connecting holes are uniformly distributed on the support plates. There are multiple connecting pipes, which are uniformly connected between the separating plate and the central guide pipe.

[0009] Furthermore, the sealing assembly includes an end cap, a drying tube, a rubber plug, and a sealing cap. The end cap is detachably fitted onto the end of the sheath, and the end cap has through-holes corresponding to a plurality of conductors. The plurality of conductors are respectively inserted into the plurality of through-holes. The drying tube is inserted through-holes at the center of the end cap, and the drying tube is filled with solid desiccant. The end of the drying tube inside the sheath is a closed design, and the closed end of the drying tube is inserted into the central guide tube. The rubber plug is annular and is fixedly connected to the closed end of the drying tube. The outer side of the rubber plug is interference-fitted with the inner wall of the central guide tube. The sealing cap is detachably installed at the open end of the drying tube, and both the sealing cap and the closed end of the drying tube are designed with filters.

[0010] Furthermore, a sealing sleeve coaxial with the opening edge of the end cap is fixedly connected, the sealing sleeve is elastic, and the inner wall of the sealing sleeve is in contact with the outer wall of the sheath.

[0011] Furthermore, the inner wall of the sheath is circumferentially distributed with arc-shaped protrusions matching its length, and the middle part of the arc-shaped protrusions protrudes towards the central guide tube and fits against the wrapping tape.

[0012] Furthermore, a heat-conducting component is provided at one closed end of the drying tube. The heat-conducting component includes a heat-conducting column, a heat-conducting pipe, and heat-conducting rods. The heat-conducting column is hollow and is inserted into the central guide pipe. The outer surface of the heat-conducting column is in close contact with multiple heat dissipation pipes. The heat-conducting pipe is vertically fixedly connected to the axis of the heat-conducting column near the end of the drying tube and passes vertically through the axis of the drying tube. There are multiple heat-conducting rods, and the multiple heat-conducting rods are uniformly and vertically fixedly connected to the surface of the heat-conducting pipe located inside the drying tube.

[0013] Furthermore, the end of the heat-conducting column away from the drying tube is designed with a conical surface, and the heat-conducting column, heat-conducting tube, and heat-conducting rod are all made of metal with high thermal conductivity.

[0014] Furthermore, a pressure ring is fixedly connected to one end of the opening of the drying tube. The edge of the pressure ring protrudes towards the end cap, and a plurality of sealing rings coaxial with the pressure ring are provided on the side of the pressure ring near the end cap. The sealing rings are in contact with the surface of the end cap.

[0015] Furthermore, the outer axial direction of the sheath has multiple sets of support bars, and each set of support bars has multiple bars. The multiple support bars are evenly distributed on the outer side of the sheath. Multiple support rings are provided between two adjacent sets of support bars. The multiple support rings are evenly sleeved on the outer side of the sheath, and the outer diameter of the support ring is flush with the side of the support bar away from the sheath.

[0016] Furthermore, a U-shaped protrusion is fixedly connected to the outer surface of the sealing cap, and the side of the U-shaped protrusion away from the sealing cap protrudes more than one end of the opening of the drying tube.

[0017] The technical effects and advantages of this invention are as follows: This invention incorporates a heat dissipation device, which allows the heat generated by the conductor during cable use to be transferred to the coolant inside the heat dissipation duct through the central guide pipe. This facilitates the rapid absorption of conductor heat through heat conduction and convection. The heat-conducting component transfers the heat from the heat dissipation duct to the drying pipe, and the combination of the sealed component and filter design enables air exchange to assist in heat dissipation. This solves the problem of heat generation during high-power charging and prevents degradation of insulation performance and conductor attenuation.

[0018] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 In this invention Figure 1 Enlarged view of part A; Figure 3 This is a three-dimensional schematic diagram of all the structures inside the sheath in this invention; Figure 4 This is a three-dimensional schematic diagram of the sheath, wrapping tape, and arc-shaped protrusions in this invention; Figure 5 This is a three-dimensional schematic diagram of the separator and heat pipe in this invention; Figure 6 This is a three-dimensional schematic diagram of the sealing component and the heat-conducting component in this invention; Figure 7 This is a three-dimensional schematic diagram of the heat-conducting component in this invention.

[0021] In the diagram: 1. Conductor; 2. Insulating sleeve; 3. Wrapping tape; 4. Sheath; 5. Central guide tube; 6. Heat dissipation conduit; 7. Separator plate; 8. Support plate; 9. Connecting tube; 10. End cap; 11. Drying tube; 12. Rubber plug; 13. Sealing cap; 14. Sealing sleeve; 15. Arc-shaped protrusion; 16. Heat-conducting column; 17. Heat-conducting pipe; 18. Heat-conducting rod; 19. Pressure ring; 20. Sealing ring; 21. Support strip; 22. Support ring; 23. U-shaped protrusion; 24. Rubber pad. Detailed Implementation

[0022] This invention discloses a special cable for new energy vehicle charging piles, which solves the defects of existing new energy vehicle charging pile cables, such as low heat dissipation efficiency and inability to adapt to high-power charging scenarios. By optimizing the internal structure of the cable and adding a high-efficiency heat dissipation device, the cable heat is rapidly conducted and dissipated, ensuring that the cable maintains a stable temperature during high-power charging, thereby improving the cable's safety, reliability and service life.

[0023] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0024] Example 1: This invention provides, for example Figures 1 to 7 The cable for charging piles of new energy vehicles shown includes: conductors 1, insulating sleeves 2, wrapping tape 3, and sheaths 4. There are multiple conductors 1. The insulating sleeves 2 are uniformly sleeved on the outside of the conductors 1. The wrapping tape 3 is uniformly sleeved on the outside of the multiple conductors 1. The sheath 4 is sleeved on the outside of the wrapping tape 3, and a heat dissipation device for dissipating heat from the multiple conductors 1 is provided on the inside of the sheath 4. The heat dissipation device includes a central guide pipe 5, heat dissipation conduits 6, a separating component, and a sealing component. The central guide pipe 5 is located at the axis of the sheath 4. There are multiple heat dissipation conduits 6. The multiple heat dissipation conduits 6 are uniformly fixedly connected to the inner wall of the central guide pipe 5 along the length direction of the central guide pipe 5, and the heat dissipation conduits 6 are filled with coolant. The separating component is uniformly distributed in a ring on the outside of the central guide pipe 5 for separating the multiple conductors 1. There are two sealing components, and the two sealing components are respectively installed at both ends of the sheath 4. Central guide tube 5: Located at the center of the sheath 4, it is made of high-temperature resistant plastic (such as PA66 + glass fiber) and serves as the fixing carrier and heat conduction channel for the heat dissipation conduit 6.

[0025] Heat dissipation conduits 6: There are multiple conduits, uniformly fixed to the inner wall of the central heat dissipation pipe 5 along its length, and made of high thermal conductivity metals such as copper or aluminum. The heat dissipation conduits 6 are filled with a special coolant (such as an aqueous solution of ethylene glycol, with a freezing point below -40℃ and a boiling point above 120℃), which can quickly absorb the heat transferred by the conductor 1 through heat conduction and convection.

[0026] Separating components: The separating components are evenly distributed in a ring on the outside of the central guide tube 5 to separate multiple conductors 1, prevent the conductors 1 from contacting each other and causing heat concentration, and at the same time assist in heat transfer.

[0027] Filler: It is placed between the outer side of the partition plate 7 and the insulating sleeve 2 of the conductor 1. It is made of PP mesh. On the one hand, it fills the gap and fixes the position of the conductor 1; on the other hand, it has a certain thermal conductivity and can assist in heat transfer.

[0028] Sealing components: There are two sealing components, which are installed at both ends of the sheath 4 to seal the inside of the cable, prevent external dust and moisture from entering, and at the same time achieve heat dissipation and internal drying.

[0029] like Figures 3 to 5 As shown, the partition assembly includes a partition plate 7, a support plate 8, and a connecting pipe 9. The partition plate 7 has a U-shaped design in its side view, and the length of the partition plate 7 matches the length of the sheath 4. The two ends of the partition plate 7 in the side view direction are inclined towards each other. The protruding part in the middle of the partition plate 7 is aligned with and fits against the central guide pipe 5. The insulating sleeve 2 of the conductor 1 can fit against the side of the partition plate 7. A filler is uniformly arranged between the outer side of the partition plate 7 and the insulating sleeve 2 of the conductor 1. There are multiple support plates 8, which are uniformly arranged on the inner side of the partition plate 7 to support the inner side of the partition plate 7. Several connecting holes are evenly distributed on the support plate 8. There are multiple connecting pipes 9, which are uniformly connected between the partition plate 7 and the central guide pipe 5. The separator 7 has a U-shaped design in the side view, and its length matches that of the sheath 4. It is made of thermally conductive plastic (such as PP + graphite). The two ends of the separator 7 in the side view are inclined towards each other, and the middle protrusion is directly opposite the central guide tube 5. The insulating sleeve 2 of the conductor 1 can fit against the side of the separator 7 to ensure that heat can be transferred to the central guide tube 5 through the separator 7. In addition, multiple separators 7 can separate multiple conductors 1 individually, so that the gaps between conductors 1 remain relatively consistent. This is beneficial for the heat to be evenly distributed inside the sheath 4 when the conductor 1 is heated, avoiding the accumulation of heat in a certain position inside the sheath 4, thereby improving the heat dissipation effect of the cable of the present invention.

[0030] Support plates 8: There are multiple support plates 8, evenly distributed inside the partition plate 7, used to support the partition plate 7 and prevent it from deforming during installation or use. The support plates 8 have evenly distributed connection holes, which facilitates the connection with the connecting pipe 9. At the same time, it facilitates the flow of heat in the partition plate 7 to the central guide pipe 5 through the connection holes and the connecting pipe 9, making the heat distribution in the entire cable more uniform.

[0031] Connecting pipe 9: There are multiple pipes, which connect the partition plate 7 and the central guide pipe 5. They are made of metal and can directly transfer the heat absorbed by the partition plate 7 to the central guide pipe 5, thereby improving heat dissipation efficiency. In addition, during the use of the cable, in addition to being bent by external forces, the cable may also be run over by a car. At this time, due to the presence of the separator component, when the sheath 4 is bent or squeezed, the separator plate 7 inside the sheath 4 will be squeezed accordingly. At this time, the two ends of the U-shaped separator plate 7 can be further closed due to the squeeze, thereby playing a buffer protection role for the conductor 1, thus ensuring that the conductor 1 will not easily break or be damaged due to external bending and crushing, and extending the service life of the conductor 1 and the cable as a whole. In addition, when the partition plate 7 is squeezed, the air inside the partition plate 7 can be compressed. At this time, the compressed air can enter the central guide pipe 5 through the connection hole, thereby accelerating the air flow rate inside the central guide pipe 5, and thus accelerating the heat in the sheath 4 to be discharged from the sheath 4 through the sealing assembly, thereby improving the heat dissipation performance of the cable.

[0032] like Figure 1 , Figure 2 and Figure 6 As shown, the sealing assembly includes an end cap 10, a drying tube 11, a rubber plug 12, and a sealing cap 13. The end cap 10 is detachably fitted onto the end of the sheath 4, and the end cap 10 has through holes corresponding to multiple conductors 1. The multiple conductors 1 are respectively inserted into the multiple through holes. An annular rubber gasket 24 is provided on the inner edge of the through hole, and the inner side of the rubber gasket 24 is in contact with the outer side of the insulating sleeve 2 to improve the sealing between the outer side of the insulating sleeve 2 and the through hole. The drying tube 11 is inserted through the center of the end cap 10, and the inside of the drying tube 11 is filled with solid desiccant. The drying tube 11 is designed to be closed at one end inside the sheath 4, and the closed end of the drying tube 11 is inserted into the central guide tube 5. The rubber plug 12 is annular and is fixedly connected to the closed end of the drying tube 11. The outer side of the rubber plug 12 is interlocked with the inner wall of the central guide tube 5. The sealing cap 13 is detachably installed at the open end of the drying tube 11. Both the sealing cap 13 and the closed end of the drying tube 11 are designed with a filter screen. A U-shaped protrusion 23 is fixedly connected to the outer surface of the sealing cap 13, and the side of the U-shaped protrusion 23 away from the sealing cap 13 protrudes more than the open end of the drying tube 11. End cap 10: Removably fitted onto the end of the sheath 4, made of plastic, with through holes corresponding to multiple conductors 1, through which the conductors 1 can be inserted. An annular rubber gasket 24 is provided on the inner edge of the through hole, which fits against the outer side of the insulating sleeve 2 to improve sealing.

[0033] Drying tube 11: Inserted through the center of end cap 10, made of metal mesh (filter design), filled with solid desiccant to absorb moisture inside the cable and prevent insulation sleeve 2 from getting damp. One end of the drying tube 11 inside the sheath 4 is a closed design (filter structure), inserted into the central guide tube 5. An annular rubber plug 12 is fixedly connected to the closed end. The outer side of the rubber plug 12 is press-fitted with the inner wall of the central guide tube 5 to ensure a seal, and also allows for quick assembly and disassembly of the drying tube 11, facilitating future maintenance of the drying tube 11.

[0034] Sealing cap 13: Removably installed at one end of the opening of the drying tube 11, made of plastic (filter design), with a U-shaped protrusion fixedly connected to the outer side (the side away from the sealing cap 13 protrudes beyond the opening end of the drying tube 11), facilitating disassembly and installation. The filter design of the sealing cap 13 and the drying tube 11 enables air exchange between the inside of the cable and the outside environment, assisting in heat dissipation.

[0035] Pressure ring 19: Fixedly connected to one end of the opening of the drying tube 11, with its edge protruding towards the end cover 10. Multiple coaxial sealing rings 20 (made of rubber) are provided on the side of the pressure ring 19 near the end cover 10, which fit against the surface of the end cover 10, further improving the sealing between the drying tube 11 and the end cover 10, and preventing moisture and dust in the air from entering the sheath 4 through the gap between the drying tube 11 and the end cover 10.

[0036] like Figure 1 and Figure 4 As shown, a sealing sleeve 14 coaxial with the opening edge of the end cap 10 is fixedly connected. The sealing sleeve 14 is elastic, and the inner wall of the sealing sleeve 14 is in contact with the outer wall of the sheath 4. An elastic sealing sleeve 14 is fixedly connected to the edge of the opening of the end cap 10. The inner wall of the sealing sleeve 14 fits against the outer wall of the sheath 4, further enhancing the sealing effect at the end of the sheath 4.

[0037] like Figure 4 As shown, the inner wall of the sheath 4 is circumferentially distributed with arc-shaped protrusions 15 that match its length. The middle part of the arc-shaped protrusions 15 protrudes towards the central guide tube 5 and fits against the wrapping tape 3. The inner wall of the sheath 4 has annularly distributed arc-shaped protrusions 15 that match the length of the sheath 4. The center of the protrusions protrudes towards the axis of the sheath 4 and there is a gap between the sheath 4 and the inner wall of the sheath 4. This design can increase the contact area between the sheath 4 and the wrapping tape 3 and assist in heat conduction. In addition, when the sheath 4 is run over by a car, the arc-shaped protrusion 15 can deform, thereby working with the buffering effect of the partition plate 7 on the conductor 1 to further protect the conductor 1 and prevent the conductor 1 from being crushed or damaged.

[0038] like Figure 6 and Figure 7As shown, a heat-conducting component is provided at the closed end of the drying tube 11. The heat-conducting component includes a heat-conducting column 16, a heat-conducting pipe 17, and a heat-conducting rod 18. The heat-conducting column 16 is hollow and is inserted into the central guide pipe 5. The outer surface of the heat-conducting column 16 is in close contact with multiple heat dissipation pipes 6. The heat-conducting pipe 17 is vertically fixedly connected to the axis of the heat-conducting column 16 near the end of the drying tube 11 and passes vertically through the axis of the drying tube 11. There are multiple heat-conducting rods 18, which are uniformly and vertically fixedly connected to the surface of the heat-conducting pipe 17 located inside the drying tube 11. The end of the heat-conducting column 16 away from the drying tube 11 is tapered. The heat-conducting column 16, the heat-conducting pipe 17, and the heat-conducting rod 18 are all made of highly thermally conductive metal. Heat-conducting column 16: Hollow design, made of copper or aluminum, inserted into the central guide tube 5, with its outer surface in close contact with multiple heat dissipation pipes 6, allowing it to quickly absorb heat from the coolant in the heat dissipation pipes 6. The end of the heat-conducting column 16 furthest from the drying tube 11 has a tapered design for easy installation.

[0039] Heat pipe 17: It is vertically fixed at the axis of the heat-conducting column 16 near the drying tube 11. The material is the same as the heat-conducting column 16. It runs vertically through the axis of the drying tube 11 and can transfer the heat absorbed by the heat-conducting column 16 to the inside of the drying tube 11.

[0040] Heat-conducting rods 18: There are multiple rods, which are uniformly and vertically fixedly connected to the surface of the heat-conducting pipe 17 located inside the drying pipe 11. The material is the same as that of the heat-conducting pipe 17. They can increase the contact area between heat and desiccant in the drying pipe 11. By transferring the heat absorbed in the heat dissipation conduit 6 to the desiccant in the drying pipe 11, the desiccant is heated, so that the desiccant is dehydrated under the heating effect. This allows the desiccant to be reused, extends the service life of the desiccant, and also reduces the maintenance frequency of the desiccant.

[0041] like Figure 1 and Figure 4 As shown, there are multiple sets of support bars 21 on the outer side of the sheath 4, and each set of support bars 21 has multiple bars. The multiple support bars 21 are evenly distributed on the outer side of the sheath 4. Multiple support rings 22 are provided between two adjacent sets of support bars 21. The multiple support rings 22 are evenly sleeved on the outer side of the sheath 4, and the outer diameter of the support ring 22 is flush with the side of the support bar 21 away from the sheath 4. During the use of the cable, the cable may be dragged on the ground. At this time, the support bar 21 can support the sheath 4, prevent the sheath 4 from directly rubbing against the ground, thereby protecting the sheath 4 and extending the service life of the sheath 4. The design of multiple sets of support bars 21 allows the sheath 4 between two adjacent sets of support bars 21 to have flexibility, thereby meeting the bending requirements of the cable during charging. The presence of the support ring 22 can compensate for the lack of support strips 21 between adjacent groups, so that the sheath 4 can be more comprehensively protected by the support strips 21 and the support ring 22.

[0042] Working principle: In operation, conductor 1, as the core component for current transmission, is part of this special cable for new energy vehicle charging piles, enabling efficient transfer of electrical energy from the charging pile to the new energy vehicle. During current transmission, conductor 1 generates heat due to its resistance, which is first transferred to the outer insulating sleeve 2.

[0043] The insulating sleeve 2 not only provides insulation and protection, but also conducts some heat to the wrapping tape 3. The wrapping tape 3 wraps and binds multiple conductors 1, and at the same time, it can further transfer heat to the inside of the sheath 4.

[0044] The heat dissipation device inside the sheath 4 begins to play a crucial role. The central guide tube 5 is located at the axis of the sheath 4, and the coolant inside the multiple heat dissipation pipes 6 that are uniformly fixed and connected on its inner wall absorbs the heat transferred from the wrapping tape 3 and the conductor 1. Through the heat conduction of the coolant and a certain degree of convection, the heat is diffused within the heat dissipation pipes 6, thereby reducing the temperature around the conductor 1.

[0045] The separator plate 7 in the separator assembly separates multiple conductors 1 to prevent the conductors 1 from coming into contact with each other and causing heat concentration. At the same time, the filler between the outer side of the separator plate 7 and the insulating sleeve 2 of the conductor 1 can also assist in heat transfer. The support plate 8 supports the separator plate 7 to ensure the stability of the separator structure. The connecting pipe 9 connects the separator plate 7 to the central guide pipe 5, which helps to transfer some heat to the central guide pipe 5.

[0046] The end caps 10 and sealing sleeves 14 in the sealing assembly ensure the sealing of both ends of the sheath 4, preventing external dust, moisture, etc. from entering the cable and affecting heat dissipation and insulation performance. The solid desiccant in the drying tube 11 can absorb moisture inside the cable, further ensuring the dryness of the internal environment of the cable and ensuring the normal operation of the heat dissipation device and conductor 1.

[0047] Example 2: 1. Structural parameters 2. Physical properties Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0048] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0050] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0051] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A special cable for new energy vehicle charging piles, characterized in that, include: Conductor (1), and the number of conductors (1) is multiple; An insulating sleeve (2) is uniformly fitted onto the outside of the conductor (1); Wrapping tape (3) is evenly wrapped around the outside of the plurality of conductors (1); A sheath (4) is fitted onto the outside of the wrapping tape (3), and a heat dissipation device for dissipating heat from multiple conductors (1) is provided on the inside of the sheath (4). The heat dissipation device includes a central guide tube (5), a heat dissipation conduit (6), a separating component, and a sealing component. The central guide tube (5) is located at the axis of the sheath (4). There are multiple heat dissipation conduits (6). Multiple heat dissipation conduits (6) are uniformly fixedly connected to the inner wall of the central guide tube (5) along the length direction of the central guide tube (5). The heat dissipation conduits (6) are filled with coolant. The separating component is uniformly distributed in a ring on the outside of the central guide tube (5) for separating multiple conductors (1). There are two sealing components. The two sealing components are respectively installed at both ends of the sheath (4).

2. The special cable for new energy vehicle charging piles according to claim 1, characterized in that: The separation assembly includes a partition plate (7), a support plate (8), and a connecting pipe (9). The partition plate (7) has a U-shaped side view and its length matches the length of the sheath (4). The two ends of the partition plate (7) in the side view are inclined towards each other. The protruding part in the middle of the partition plate (7) is aligned with and fits the central guide pipe (5). The insulating sleeve (2) of the conductor (1) can fit against the side of the partition plate (7). A filler is uniformly arranged between the outer side of the partition plate (7) and the insulating sleeve (2) of the conductor (1). There are multiple support plates (8). Multiple support plates (8) are uniformly arranged on the inner side of the partition plate (7) to support the inner side of the partition plate (7). Several connecting holes are uniformly distributed on the support plate (8). There are multiple connecting pipes (9). Multiple connecting pipes (9) are uniformly connected between the partition plate (7) and the central guide pipe (5).

3. The special cable for new energy vehicle charging piles according to claim 2, characterized in that: The sealing assembly includes an end cap (10), a drying tube (11), a rubber stopper (12), and a sealing cap (13). The end cap (10) is detachably fitted onto the end of the sheath (4), and the end cap (10) has through holes corresponding to a plurality of conductors (1). The plurality of conductors (1) are respectively inserted into the plurality of through holes. The drying tube (11) is inserted through the center of the end cap (10), and the drying tube (11) is filled with solid desiccant. The drying tube (11) is located at the center of the sheath (4). One end of the sleeve (4) is designed to be closed, and the closed end of the drying tube (11) is inserted into the central guide tube (5). The rubber plug (12) is annular and is fixedly connected to the closed end of the drying tube (11). The outer side of the rubber plug (12) is inserted into the inner wall of the central guide tube (5) with an interference fit. The sealing cap (13) is detachably installed at the open end of the drying tube (11). Both the sealing cap (13) and the closed end of the drying tube (11) are designed with a filter screen.

4. The special cable for new energy vehicle charging piles according to claim 3, characterized in that: The opening edge of the end cap (10) is fixedly connected to a sealing sleeve (14) coaxial with it. The sealing sleeve (14) is elastic, and the inner wall of the sealing sleeve (14) can fit together with the outer wall of the sheath (4).

5. The special cable for new energy vehicle charging piles according to claim 4, characterized in that: The inner wall of the sheath (4) is circumferentially distributed with arc-shaped protrusions (15) matching its length. The middle part of the arc-shaped protrusions (15) protrudes towards the central guide tube (5) and fits against the wrapping tape (3).

6. The special cable for new energy vehicle charging piles according to claim 5, characterized in that: A heat-conducting component is provided at one closed end of the drying tube (11). The heat-conducting component includes a heat-conducting column (16), a heat-conducting tube (17), and a heat-conducting rod (18). The heat-conducting column (16) is hollow and is inserted into the central guide tube (5). The outer side of the heat-conducting column (16) is in contact with multiple heat dissipation pipes (6). The heat-conducting tube (17) is vertically fixed at the axis of the heat-conducting column (16) near the end of the drying tube (11) and vertically passes through the axis of the drying tube (11). There are multiple heat-conducting rods (18), and multiple heat-conducting rods (18) are uniformly and vertically fixedly connected to the surface of the heat-conducting tube (17) located inside the drying tube (11).

7. The special cable for new energy vehicle charging piles according to claim 6, characterized in that: The end of the heat-conducting column (16) away from the drying tube (11) is designed with a conical surface, and the heat-conducting column (16), the heat-conducting tube (17) and the heat-conducting rod (18) are all made of metal with high thermal conductivity.

8. The special cable for new energy vehicle charging piles according to claim 7, characterized in that: A pressure ring (19) is fixedly connected to one end of the opening of the drying tube (11). The edge of the pressure ring (19) protrudes towards the end cap (10), and a plurality of sealing rings (20) coaxial with the pressure ring (19) are provided on the side of the pressure ring (19) near the end cap (10). The sealing rings (20) are in contact with the surface of the end cap (10).

9. The special cable for new energy vehicle charging piles according to claim 8, characterized in that: The outer axial direction of the sheath (4) has multiple sets of support bars (21), and each set of support bars (21) has multiple bars. The multiple support bars (21) are evenly distributed on the outer side of the sheath (4). Multiple support rings (22) are provided between two adjacent sets of support bars (21). The multiple support rings (22) are evenly sleeved on the outer side of the sheath (4), and the outer diameter of the support ring (22) is flush with the side of the support bar (21) away from the sheath (4).

10. The special cable for new energy vehicle charging piles according to claim 9, characterized in that: A U-shaped protrusion (23) is fixedly connected to the outer surface of the sealing cap (13), and the side of the U-shaped protrusion (23) away from the sealing cap (13) protrudes further than the end of the opening of the drying tube (11).

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