Quick charging cable for new energy charging pile

Abstract

The invention discloses a quick charging cable for a new energy charging pile, and relates to the technical field of new energy charging equipment, the quick charging cable comprises a plurality of conductor layers, insulating layers are sleeved among the outer surface walls of the plurality of conductor layers, filling layers are sleeved among the outer surface walls of the plurality of insulating layers, and temperature conducting layers are fixedly inserted among the inner surface walls of the filling layers. An isolation plate is fixedly inserted into the inner surface wall of the heat conduction layer, and a plurality of air holes are formed in one side of the outer wall of the isolation plate. According to the invention, through the interaction of all layers of materials, heat generated in the electric power transmission process can be effectively gathered to the center, heat dissipation is carried out in a wind power circulation mode, and under the cooperation of multi-layer isolation, internal and external heat isolation is realized, and the problem of interference caused by mutual circulation is avoided; the equipment guarantees the safety of the cable and the surrounding environment from the aspects of heat insulation, fire prevention and heat dissipation, greatly improves the operation stability of a charging system, and also guarantees the electrical safety in the charging process.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy charging equipment, in particular to a fast charging cable for a new energy charging pile. Background Art

[0002] In today's era, new energy vehicles have attracted much attention from all walks of life due to their use of new power systems and their complete or main reliance on new energy to drive. Among them, new energy electric vehicles have been vigorously promoted by the country, and their market share has shown a growing trend. However, with the continuous increase in the number of new energy electric vehicles, many related problems have gradually emerged. The charging problem has become one of the important factors restricting its further development. In the entire new energy electric vehicle charging process, new energy charging cables play a vital role. As a key component connecting charging piles and new energy vehicles, it is directly related to whether electric energy can be transmitted stably and efficiently, and thus affects the success of each charging process. It can be said that the performance of new energy charging cables largely affects the convenience of using new energy electric vehicles and the sustainable development of the entire industry.

[0003] During fast charging, due to the need to transmit a large current, the accumulation of heat will inevitably have a negative impact on the efficiency of power transmission, making the charging process slow and unable to meet the needs of fast charging. Secondly, after being in a high temperature environment for a long time, the various properties of the cable itself will gradually decline. For example, the insulation performance may deteriorate, the conductivity of the conductor may decrease, etc., which will greatly reduce the service life of the cable. What is more serious is that excessive temperature may also cause safety hazards such as short circuits and fires, posing a serious threat to charging piles and the surrounding environment. At the same time, the use environment of charging piles is complex and diverse. For example, in some places with complex electromagnetic environments, external electromagnetic fields may interfere with the electrical signals transmitted in the cable. , affecting the normal charging process. At the same time, the signal transmitted by the cable itself may also radiate outward and interfere with the normal operation of other surrounding electronic equipment. Therefore, good electromagnetic shielding capabilities are indispensable. Furthermore, considering the risk of fire, once the cable catches fire, it is easy to cause serious consequences. Therefore, it must have excellent flame retardant properties so that it can effectively suppress the spread of flames in the case of open flames or high temperatures and minimize the damage caused by fire. Moreover, in daily use, the cable will also be subjected to external forces such as extrusion, stretching, impact, friction and other working conditions. This requires it to have sufficiently strong mechanical protection performance to protect the internal structure from damage, thereby ensuring that electrical energy can be transmitted safely and stably; However, traditional charging cables are often difficult to meet the above-mentioned performance requirements at the same time due to their own structural design and material properties, and are difficult to adapt to the high standards of fast charging of new energy charging piles and complex use environments; Therefore, a high-performance fast charging cable specially tailored for new energy charging piles is designed so that it can efficiently dissipate heat during fast charging and at the same time ensure safe and stable transmission of electric energy in all directions in complex and diverse environments. Summary of the invention

[0004] The purpose of the present invention is to provide a fast charging cable for a new energy charging pile to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fast charging cable for a new energy charging pile, comprising: a plurality of conductor layers, an insulating layer is sleeved between the outer surfaces of the plurality of conductor layers, a filling layer is sleeved between the outer surfaces of the plurality of insulating layers, a thermal conductive layer is fixedly inserted between the inner surfaces of the filling layers, an insulating plate is fixedly inserted into the inner surface of the thermal conductive layer, and a plurality of air holes are opened on one side of the outer wall of the insulating plate. Firstly, during the use of the cable, the plurality of conductor layers are used to transmit current to realize the transmission of electric energy. When used for a long time, the conductor layer itself overheats. At this time, the insulating layer of its outer wall can effectively absorb the heat of the conductor layer itself into itself, and then dissipate it outward, and the filling layer wraps the plurality of insulating layers inside itself, and the filling layer is made of expanded vermiculite, which has a natural porous structure. These pores are interconnected to form a shape similar to a "leakage hole", which helps heat to pass through its interior. The heat is transferred through convection conduction and other methods, and gradually transferred to the inside of the thermal conductive layer. The thermal conductive layer is made of ceramic silicone rubber, which can gradually absorb the temperature of itself and transfer it to the inner space. One side of the cable is connected to the charging pile, not only to achieve power connection, but also to set a micro fan circulation device on the charging pile. Since the insulation board is isolated into two spaces on the inner wall of the thermal conductive layer, and multiple air holes are opened on the outer wall of the insulation board on one side, when the equipment is charging and the charging pile is charging, the micro fan circulation device is started, with the charging pile as the starting end, and the airflow is injected into the inside of the two spaces by pressurizing on one side. After the cold gas is injected on one side, it is transported forward and flows into the other space through multiple air holes, and circulates back. In this process, the gas is always in contact with the inner wall of the thermal conductive layer. During the circulation process, the heat inside the cable is gradually driven to complete the effective cooling of the cable. The heat capacity of the insulating layer, filling layer and thermal conductive material of the thermal conductive layer defines thermal conductivity. In actual calculations, the heat capacity calculation formula of each layer of thermal conductive material is: b is the specific heat capacity of the thermal conductive material; v is the density of the thermal conductive material; p is the volume of the thermal conductive material. According to this formula, during the cable manufacturing process, various data are adjusted to adjust the thermal conductivity of the cable in use, thereby achieving heat dissipation of the cable.

[0006] Preferably, the outer wall of the filling layer is provided with a heat insulation layer, the outer wall fixing sleeve of the heat insulation layer is provided with a flame retardant layer, and the outer wall fixing sleeve of the flame retardant layer is provided with a high temperature resistant layer. The function of the heat insulation layer is to isolate the heat inside the cable during the heat transfer process, the flame retardant layer plays a role in suppressing the spread of flames, and the high temperature resistant layer ensures the normal operation of the cable under high temperature conditions and ensures the safe transmission of electric energy.

[0007] Preferably, the outer wall fixing sleeve of the high temperature resistant layer is provided with a first air-filled layer, the outer wall fixing sleeve of the first air-filled layer is provided with a shielding layer, and the outer wall fixing sleeve of the shielding layer is provided with an inner sheath layer. The first air-filled layer can change the dielectric constant distribution inside the cable, thereby regulating the electric field distribution. The shielding layer can prevent external electromagnetic interference from entering the cable and affecting the accuracy and stability of signal transmission. At the same time, it can also reduce the situation where the internal signal of the cable radiates outward and interferes with other surrounding electronic equipment. The inner sheath layer can withstand a certain degree of extrusion, stretching, bending and other mechanical external forces.

[0008] Preferably, the outer wall of the inner sheath layer is fixedly connected to a reinforcement layer, the outer wall of the reinforcement layer is provided with a rubber layer, and the outer wall of the rubber layer is fixedly sleeved with an outer sheath layer. The reinforcement layer enhances the mechanical properties of the cable so that the cable can withstand greater tension, pressure and other mechanical external forces. The rubber layer can serve as insulation, sheath layer and other different functions. The outer sheath layer protects the internal structure of the cable from various adverse external factors, ensuring that the cable can safely and stably transmit electrical energy or signals under different usage environments.

[0009] Preferably, the plurality of conductor layers are made of high-purity oxygen-free copper, each with a diameter of 3 mm, the insulating layer is made of magnesium oxide insulating thermal conductive material, the filling layer is made of expanded vermiculite, and the thermal conductive layer is made of ceramic silicone rubber. The conductor layer made of high-purity oxygen-free copper has excellent electrical conductivity, can effectively reduce the resistance loss of the cable in the process of transmitting electric energy, and improve the efficiency of electric energy transmission. The insulating layer is attached between the outer walls of the conductor layer. Since the insulating layer is made of magnesium oxide insulating thermal conductive material, it has high resistivity and low dielectric constant, and can effectively prevent current leakage and short circuit. The thermal conductivity of the insulating layer itself can reach 36W / (m・K), and its own melting point is as high as more than two thousand degrees Celsius. It can maintain stable physical and chemical properties in a high temperature environment, reducing the cable in The outer wall of multiple insulation layers is provided with a filling layer, and the filling layer is made of expanded vermiculite through high-temperature roasting and other processes, and a large number of tiny holes and pores can be formed inside it. When the heat from the insulation layer to the outside is gradually diffused and transferred through such holes and pores, the heat is evenly distributed. When the heat gathers and contacts the thermal conductive layer, since the thermal conductive layer is made of ceramic silicone rubber, it can efficiently conduct the heat and transfer it to the circular hole channel between the inner wall of the thermal conductive layer. In extreme conditions such as high temperature or fire, the ceramic silicone rubber will undergo a ceramic transformation. The ceramic structure has good thermal insulation and flame retardancy, and can effectively block flames and heat, forming an effective firewall structure, further improving the safety performance inside the cable.

[0010] Preferably, the thermal insulation layer is formed by aerogel extrusion; the flame retardant layer is made of low-smoke halogen-free polyolefin; the high-temperature resistant layer is made of mica tape as the main material. The thermal insulation layer can form a wall. Since it is formed by aerogel extrusion, it has a unique nanoporous structure inside. It is difficult for heat to penetrate through these extremely fine and air-filled pores, thereby isolating the heat. The flame retardant layer, low-smoke halogen-free polyolefin, itself has good flame retardant properties. When encountering open flames or high temperatures, it can effectively suppress the spread of flames and reduce the damage caused by fire to the cable and the surrounding environment. The high-temperature resistant layer acts to thermally stratify the internal and external cable layers. This treatment isolates the different cable layers inside and outside from each other. The heat generated by the cable when it is energized is dissipated by low-temperature wind circulation inside it, and the heat generated outside is difficult to penetrate into the cable, avoiding interference with the cable.

[0011] Preferably, the first air-filled layer and the second air-filled layer are formed by filling with nitrogen. Nitrogen is used to fill two layers inside the cable. Nitrogen has stable chemical properties, is not easily ionized, and has poor conductivity, which improves the external insulation of the cable when in use. Due to the inertness of nitrogen, it reduces contact with external oxygen, effectively preventing oxidation reactions that lead to performance degradation, corrosion, and other problems, thereby extending the service life of various components inside the cable.

[0012] Preferably, the shielding layer is formed by copper wire braided mesh, the inner sheath layer is made of thermoplastic elastomer material, the reinforcement layer is woven by aramid fiber, the rubber layer is made of natural rubber, and the outer sheath layer is made of polyvinyl chloride material. The copper wire braided mesh has good conductivity, effectively shielding external electromagnetic interference, preventing external electromagnetic fields from affecting electrical signals transmitted in the cable, and improving the normal operation of the electromagnetic equipment system. The inner sheath layer is processed with thermoplastic elastomer material, thereby improving the overall elasticity and plasticity of the cable when in use, so as to resist frequent use during use. The cable is protected by the aramid fiber of the reinforcement layer, which is resistant to tensile and extrusion, and further improves the structural stability and durability of the cable. The rubber layer is made of rubber material, which can play a buffering role when the cable is impacted or crushed, absorb and disperse the impact force, and effectively protect the internal layers. Finally, the outer sheath layer is arranged on the outermost layer of the cable, and it itself has a certain hardness and strength, which can resist mechanical damage such as friction, scratches and collisions, and can withstand various environments, ensuring its stability and reliability in various environments.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, through the interaction of various layers of materials, the heat generated during the power transfer process can be effectively gathered to the center and dissipated in the form of wind circulation. In conjunction with multi-layer insulation, internal and external heat isolation is achieved to avoid interference caused by mutual circulation. The device ensures the safety of the cable itself and the surrounding environment from the aspects of heat insulation, fire prevention and heat dissipation, greatly improves the stability of the charging system operation, and ensures the electrical safety of the charging process.

[0014] 2. In the present invention, the cable can resist interference from complex external electromagnetic environments, ensure that charging signals and various control and feedback signals are accurately transmitted within the cable, ensure the stability and accuracy of charging of new energy vehicles, and improve charging quality and efficiency.

[0015] 3. In the present invention, through the close cooperation of various structural layers, the fast charging cable for new energy charging piles can show excellent performance in power transmission, heat dissipation, and coping with various complex environments, meeting the strict requirements in new energy charging scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional plan view of a fast charging cable for a new energy charging pile of the present invention; Figure 2 This is a three-dimensional diagram of a fast charging cable for a new energy charging pile of the present invention; Figure 3 It is a cross-sectional perspective view of a fast charging cable for a new energy charging pile of the present invention; Figure 4 It is a partial cross-sectional plan view of a fast charging cable for a new energy charging pile of the present invention.

[0017] In the figure: 1. conductor layer; 2. insulation layer; 3. filling layer; 4. thermal conductive layer; 41. isolation board; 42. air vents; 5. thermal insulation layer; 6. flame retardant layer; 7. high temperature resistant layer; 8. first inflation layer; 9. shielding layer; 10. inner sheath layer; 11. reinforcement layer; 12. rubber layer; 13. second inflation layer; 14. outer sheath layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the implementation rules described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1, refer to Figure 1-Figure 4As shown: The present invention provides a fast charging cable for a new energy charging pile, comprising: a plurality of conductor layers 1, an insulating layer 2 is sleeved between the outer walls of the plurality of conductor layers 1, a filling layer 3 is sleeved between the outer walls of the plurality of insulating layers 2, a thermal conductive layer 4 is fixedly inserted between the inner walls of the filling layer 3, an insulating plate 41 is fixedly inserted into the inner wall of the thermal conductive layer 4, and a plurality of air holes 42 are opened on one side of the outer wall of the insulating plate 41. First, during the use of the cable, the plurality of conductor layers 1 are used to transmit current to realize the transmission of electric energy. When used for a long time, the conductor layer 1 itself overheats. At this time, the insulating layer 2 on its outer wall can effectively absorb the heat of the conductor layer 1 itself into itself, and then dissipate it outward, and the filling layer 3 wraps the plurality of insulating layers 2 inside itself, and the filling layer 3 is made of expanded vermiculite, which has a natural porous structure. These pores are interconnected to form a shape similar to a "leak hole", which is helpful for heat to be conducted through convection inside the cable. The heat is transferred in a certain way and gradually transferred to the inside of the thermal conductive layer 4. The thermal conductive layer 4 is made of ceramic silicone rubber, which can gradually absorb the temperature of itself and transfer it to the inner space. One side of the cable is connected with the charging pile, not only realizing power connection, but also setting a micro fan circulation device on the charging pile. Since the insulation board 41 is isolated into two spaces on the inner surface wall of the thermal conductive layer 4, and a plurality of air holes 42 are opened on the outer surface wall of the insulation board 41 on one side, when the device is in the charging process and the charging pile is in the charging process, the micro fan circulation device is started, with the charging pile as the starting end, and the airflow is injected into the inside of the two spaces by pressurizing on one side. After the cold gas is injected on one side, it is transported forward and flows into the other space through a plurality of air holes 42, and circulates back. In this process, the gas is always in contact with the inner surface wall of the thermal conductive layer 4. During the circulation process, the heat inside the cable is driven one after another, completing the effective cooling treatment of the cable. The heat capacity of the thermal conductive materials of the insulation layer 2, the filling layer 3 and the thermal conductive layer 4 defines the thermal conductivity. In actual calculations, the heat capacity calculation formula of each layer of thermal conductive material is: b is the specific heat capacity of the thermal conductive material; v is the density of the thermal conductive material; p is the volume of the thermal conductive material. According to this formula, during the cable manufacturing process, various data are adjusted to adjust the thermal conductivity of the cable during use, thereby achieving heat dissipation of the cable.

[0019] according to Figure 1-Figure 3 As shown, the outer wall of the filling layer 3 is provided with a heat insulating layer 5, the outer wall fixed sleeve of the heat insulating layer 5 is provided with a flame retardant layer 6, and the outer wall fixed sleeve of the flame retardant layer 6 is provided with a high temperature resistant layer 7. The heat insulating layer 5 can isolate the heat inside the cable during the heat transfer process, the flame retardant layer 6 plays a role in suppressing the spread of flames, and the high temperature resistant layer 7 ensures the normal operation of the cable under high temperature conditions and guarantees the safe transmission of electric energy.

[0020] according to Figure 1-Figure 3 As shown, the outer wall fixed sleeve of the high temperature resistant layer 7 is provided with a first air-filled layer 8, the outer wall fixed sleeve of the first air-filled layer 8 is provided with a shielding layer 9, and the outer wall fixed sleeve of the shielding layer 9 is provided with an inner sheath layer 10. The first air-filled layer 8 can change the dielectric constant distribution inside the cable, and thus can regulate the electric field distribution. The shielding layer 9 can prevent external electromagnetic interference from entering the cable and affecting the accuracy and stability of signal transmission. At the same time, it can also reduce the situation where the internal signal of the cable radiates outward and interferes with other surrounding electronic equipment. The inner sheath layer 10 can withstand a certain degree of extrusion, stretching, bending and other mechanical external forces.

[0021] according to Figure 2-Figure 3 As shown, the outer wall of the inner sheath layer 10 is fixedly connected with a reinforcement layer 11, the outer wall of the reinforcement layer 11 is provided with a rubber layer 12, and the outer wall of the rubber layer 12 is fixedly provided with an outer sheath layer 14. The reinforcement layer 11 enhances the mechanical properties of the cable so that the cable can withstand greater tension, pressure and other mechanical external forces. The rubber layer 12 can serve as an insulation, sheath layer and other different functions. The outer sheath layer 14 protects the internal structures of the cable from various adverse external factors, ensuring that the cable can safely and stably transmit electrical energy or signals under different usage environments.

[0022] according to Figure 1 and Figure 4As shown, multiple conductor layers 1 are made of high-purity oxygen-free copper, each with a diameter of 3 mm, the insulating layer 2 is made of magnesium oxide insulating thermal conductive material, the filling layer 3 is made of expanded vermiculite, and the thermal conductive layer 4 is made of ceramic silicone rubber. The conductor layer 1 made of high-purity oxygen-free copper has excellent conductivity, which can effectively reduce the resistance loss of the cable in the process of transmitting electric energy and improve the efficiency of electric energy transmission. The insulating layer 2 is attached to the outer wall of the conductor layer 1. Since the insulating layer 2 is made of magnesium oxide insulating thermal conductive material, it has high resistivity and low dielectric constant, which can effectively prevent current leakage and short circuit. The thermal conductivity of the insulating layer 2 itself can reach 36W / (m・K), and its own melting point is as high as more than two thousand degrees Celsius. It can maintain stable physical and chemical properties in a high temperature environment, reducing the cable during use. Safety hazards, and the outer wall of the multiple insulating layers 2 is provided with a filling layer 3, the filling layer 3 is made of expanded vermiculite through high-temperature roasting and other processes, and can form a large number of tiny holes and pores inside it. When the heat generated by the insulating layer 2 to the outside is gradually diffused and transferred through such holes and pores to achieve uniform heat distribution, and when the heat is gathered and contacts with the thermal conductive layer 4, since the thermal conductive layer 4 is made of ceramic silicone rubber, it can efficiently conduct heat and transfer it to the circular hole channel position between the inner surface walls of the thermal conductive layer 4, and in extreme conditions such as high temperature or fire, the ceramic silicone rubber will undergo a ceramic transformation, and the ceramic structure has good thermal insulation and flame retardancy, can effectively block flames and heat, form an effective firewall structure, and further improve the safety performance inside the cable.

[0023] according to Figure 2-Figure 3 As shown, the thermal insulation layer 5 is formed by aerogel extrusion; the flame retardant layer 6 is made of low-smoke halogen-free polyolefin; the high-temperature resistant layer 7 is made of mica tape as the main material. The thermal insulation layer 5 can form a wall. Since it is formed by aerogel extrusion, it has a unique nanoporous structure inside. It is difficult for heat to penetrate through these extremely fine and air-filled pores, thereby isolating the heat. The flame retardant layer 6, low-smoke halogen-free polyolefin itself has good flame retardant properties. When encountering open flames or high temperatures, it can effectively suppress the spread of flames and reduce the damage caused by fire to the cable and the surrounding environment. The high-temperature resistant layer 7 acts to thermally stratify the internal and external cable layers. This treatment isolates the different cable layers inside and outside from each other. The heat generated by the cable when it is energized is dissipated by the internal heat conduction wind circulation, and the heat generated outside is difficult to penetrate into the cable, avoiding interference with the cable.

[0024] according to Figure 3As shown, the first air-filled layer 8 and the second air-filled layer 13 are formed by filling with nitrogen. Two layers of nitrogen are filled inside the cable. Nitrogen itself has stable chemical properties, is not easy to ionize, and has poor conductivity, which improves the external insulation of the cable when in use. Due to the inertness of nitrogen, it reduces contact with external oxygen, effectively preventing oxidation reactions that lead to performance degradation, corrosion, and other problems, thereby extending the service life of various components inside the cable.

[0025] according to Figure 2-Figure 3 As shown, the shielding layer 9 is formed by a copper wire braided mesh, the inner sheath layer 10 is made of a thermoplastic elastomer material, the reinforcement layer 11 is woven from aramid fibers, the rubber layer 12 is made of natural rubber, and the outer sheath layer 14 is made of polyvinyl chloride material. The copper wire braided mesh has good electrical conductivity, effectively shielding external electromagnetic interference, preventing external electromagnetic fields from affecting the electrical signals transmitted in the cable, and improving the normal operation of the electromagnetic equipment system. The inner sheath layer 10 is made of a thermoplastic elastomer material, thereby improving the overall elasticity and plasticity of the cable when in use, so as to resist frequent bending during use. , twisting and other deformations, thereby protecting the cable, and the aramid fiber of the reinforcement layer 11 has the ability to resist stretching and extrusion, further improving the structural stability and durability of the cable, the rubber layer 12 is made of rubber material, which can play a buffering role when the cable is impacted or crushed, absorb and disperse the impact force, and effectively protect the various layers inside it, and finally the outer sheath layer 14 is arranged on the outermost layer of the cable, and it itself has a certain hardness and strength, resists the mechanical damage such as friction, scratches, collisions, etc., and can withstand various environments, ensuring its stability and reliability in various environments.

[0026] The working principle of the whole mechanism is as follows: a plurality of conductor layers 1 are arranged inside the cable, and these conductor layers 1 are made of high-purity oxygen-free copper, which has excellent conductivity, effectively reducing the resistance loss of the cable in the process of transmitting electric energy, and realizing the efficient transmission of electric energy from the charging pile to the electrical equipment. With the long-term use of the cable, the conductor layer 1 will overheat due to the continuous transmission of current. At this time, the insulating layer 2 attached to the outer wall of the conductor layer 1 is made of magnesium oxide insulating thermal conductive material, which has the characteristics of high resistivity and low dielectric constant. Its own thermal conductivity can reach 36W / (m・K), which can absorb the heat generated by the conductor layer 1 into itself and dissipate it outward. The filling layer 3 is made of expanded vermiculite that has been calcined by high-temperature roasting and other processes. A large number of small and interconnected holes and pores are formed inside it, presenting a shape similar to a "leak hole". The heat dissipated by the insulating layer 2 will pass through these pores and be evenly diffused and transferred inside the filling layer 3 by convection conduction and other methods. And then transferred to the thermal conductive layer 4, and the thermal conductive layer 4 is made of ceramic silicone rubber, this material can absorb the heat from the filling layer 3 and transfer it to its internal space, laying the foundation for the subsequent heat dissipation cycle, and one side of the cable is connected to the charging pile, not only to achieve power connection, but also to set a micro fan circulation device on the charging pile, because the insulation board 41 is isolated into two spaces on the inner surface wall of the thermal conductive layer 4, and a plurality of air holes 42 are opened on the outer surface wall of the insulation board 41 on one side, when the device is in the charging process and the charging pile is in the charging process, the micro fan circulation device is started, and the charging pile is used as the starting section, and the air flow is injected into the inside of the two spaces by pressurizing on one side, and after the cold gas is injected on one side, it is transported forward and flows into the other space through a plurality of air holes 42, and circulates back. In this process, the gas is always in contact with the inner surface wall of the thermal conductive layer 4, and the heat inside the cable is driven in succession during the circulation process, completing the effective cooling treatment of the cable; The flame retardant layer 6 is made of low-smoke halogen-free polyolefin, which has good flame retardant properties. When the cable encounters open flames or is in a high-temperature environment, the flame retardant layer 6 can effectively inhibit the spread of flames and minimize the damage caused by fire to the cable and the surrounding environment, in order to ensure the safe transmission of electric energy and the safety of the surrounding environment. The high-temperature resistant layer 7 is made of mica tape as the main material. Its main function is to perform heat stratification on different cable layers inside and outside the cable. In this way, the internal heat generated by the cable can be processed through its own internal mechanisms such as temperature conduction and wind power circulation heat dissipation, while the external heat is difficult to penetrate into the cable, and vice versa, thereby ensuring that the cable can still operate normally under high-temperature conditions. The cable is filled with two layers (such as the first gas filling layer 8, etc.). Nitrogen itself has stable chemical properties, is not easy to ionize, and has poor conductivity. On the one hand, it can change the dielectric constant distribution inside the cable, thereby effectively regulating the electric field distribution and enhancing the external insulation performance of the cable;On the other hand, relying on the inertness of nitrogen, the probability of contact between the internal components of the cable and external oxygen can be reduced, effectively preventing the components from undergoing oxidation reactions, avoiding performance degradation and corrosion caused by oxidation, thereby extending the service life of the internal components of the cable and ensuring long-term and reliable operation of the cable. The shielding layer 9 is formed by a copper wire braided mesh, which can effectively prevent external electromagnetic interference from entering the cable, ensuring that the electrical signals transmitted in the cable are not affected by the external electromagnetic field. At the same time, it can also reduce the outward radiation of the electrical energy signal transmitted inside the cable, avoiding interference with other surrounding electronic equipment, and maintaining the normal operation of the entire electromagnetic environment. The inner sheath layer 10 is made of thermoplastic elastomer material, which has both elasticity and good processing performance, so that the inner sheath layer 10 can withstand a certain degree of extrusion, stretching, bending and other mechanical external forces, and the reinforcement layer 11 is woven with aramid fiber, which has excellent tensile and extrusion resistance. The inner sheath layer 10 cooperates with the reinforcement layer 11 to further enhance the cable. Mechanical properties allow the cable to withstand greater tension, pressure and other complex mechanical external forces, ensuring that the cable is structurally stable and not prone to damage in various scenarios such as laying and use. The rubber layer 12 is made of rubber material. When the cable is subjected to external forces such as impact or rolling, the rubber layer 12 can play a buffering role with its own good elasticity, absorb and disperse these impact forces, avoid damage to the internal key structure due to external impact, and ensure that the cable maintains a normal working state. The outer sheath layer 14 is set at the outermost layer of the cable. It is made of polyvinyl chloride material and has a certain hardness and strength. It can effectively resist various mechanical damages such as friction, scratches, and collisions from the outside. In addition, the outer sheath layer 14 can also withstand different environmental conditions. Whether it is outdoor wind and sun, high temperature and humidity, or other harsh environments, it can reliably protect the internal layers of the cable from external adverse factors, ensuring that the cable can safely and stably transmit power or signals in a variety of use environments. ;

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Fast charging cable for new energy charging piles, including: A plurality of conductor layers (1), characterized in that an insulating layer (2) is sleeved between the outer walls of the plurality of conductor layers (1), a filling layer (3) is sleeved between the outer walls of the plurality of insulating layers (2), a thermal conductive layer (4) is fixedly inserted between the inner walls of the filling layers (3), an insulating plate (41) is fixedly inserted into the inner wall of the thermal conductive layer (4), and a plurality of air holes (42) are provided on one side of the outer wall of the insulating plate (41).

2. The fast charging cable for the new energy charging pile according to claim 1, characterized in that: The outer wall of the filling layer (3) is provided with a heat insulation layer (5), the outer wall fixed sleeve of the heat insulation layer (5) is provided with a flame retardant layer (6), and the outer wall fixed sleeve of the flame retardant layer (6) is provided with a high temperature resistant layer (7).

3. The fast charging cable for the new energy charging pile according to claim 2, characterized in that: The outer wall fixing sleeve of the high temperature resistant layer (7) is provided with a first air-filled layer (8), the outer wall fixing sleeve of the first air-filled layer (8) is provided with a shielding layer (9), and the outer wall fixing sleeve of the shielding layer (9) is provided with an inner sheath layer (10).

4. The fast charging cable for the new energy charging pile according to claim 3, characterized in that: The outer wall of the inner jacket layer (10) is fixedly connected to a reinforcement layer (11), the outer wall of the reinforcement layer (11) is provided with a rubber layer (12), and the outer wall of the rubber layer (12) is fixedly sleeved with an outer jacket layer (14).

5. The fast charging cable for the new energy charging pile according to claim 4, characterized in that: The plurality of conductor layers (1) are all made of high-purity oxygen-free copper, each having a diameter of 3 mm, the insulating layer (2) is made of magnesium oxide insulating thermal conductive material, the filling layer (3) is made of expanded vermiculite, and the thermal conductive layer (4) is made of ceramic silicone rubber.

6. The fast charging cable for the new energy charging pile according to claim 5, characterized in that: The heat insulation layer (5) is formed by extruding aerogel; the flame retardant layer (6) is made of low-smoke halogen-free polyolefin; and the high-temperature resistant layer (7) is made of mica tape as a main material.

7. The fast charging cable for the new energy charging pile according to claim 6, characterized in that: The first air-filled layer (8) and the second air-filled layer (13) are formed by filling with nitrogen.

8. The fast charging cable for the new energy charging pile according to claim 7, characterized in that: The shielding layer (9) is formed by a copper wire braided mesh, the inner sheath layer (10) is made of a thermoplastic elastomer material, the reinforcement layer (11) is braided with aramid fibers, the rubber layer (12) is made of natural rubber, and the outer sheath layer (14) is made of a polyvinyl chloride material.

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