Cable for charging high-power liquid-cooled new energy automobile

Abstract

The utility model discloses a high-power liquid-cooled new energy automobile charging cable, which comprises a sheath, conductors and insulating layers, the insulating layers are wrapped outside the conductors, the sheath is wrapped outside the plurality of insulating layers, the cable also comprises an inner liquid-cooled pipe which is located in the middle of the cable, the outer side of the inner liquid-cooled pipe is uniformly provided with large grooves and small grooves, and the large grooves and the small grooves are communicated with the inner liquid-cooled pipe. And the large grooves and the small grooves are alternately arranged at intervals. According to the high-power liquid-cooled cable for charging the new energy automobile, the insulating layer and the outer liquid-cooled pipe are fixed through the large groove and the small groove, the outer liquid-cooled pipe and the inner liquid-cooled pipe are connected through the power terminal, so that liquid can flow in the outer liquid-cooled pipe and the inner liquid-cooled pipe, the interior of the cable is cooled in a flowing manner, and the charging efficiency of the high-power liquid-cooled cable is improved. Due to the arrangement of the large grooves and the small grooves, the paths of the insulating layers and the outer liquid cooling pipes are limited, mutual contact of the multiple insulating layers can be avoided in the manufacturing process, the outer liquid cooling pipes and the insulating layers are alternately arranged, then the outer liquid cooling pipes can absorb a part of heat, and the heat dissipation effect of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables for new energy vehicle charging, in particular to a high-power liquid-cooled cable for new energy vehicle charging. Background Technique

[0002] The cable for new energy vehicle charging is a key component connecting the charging pile and the new energy vehicle. The cable for new energy vehicle charging needs to have the properties of high and low temperature resistance, oil and water resistance, flame retardancy, tear resistance, insulation, anti-UV aging, etc. compared with ordinary cables. The liquid-cooled cable sets up a special liquid circulation channel between the cable and the charging gun, and adds coolant. During the charging process, the power pump pushes the coolant to circulate, thereby effectively taking away the heat generated during charging. This method improves the charging efficiency and speed, and at the same time reduces the heat generation of the cable.

[0003] For example, a liquid-cooled cable with the publication number of CN116168887A, a first hollow tube through which conductive coolant flows is arranged inside the cable outer sheath. The first power line is immersed in the conductive coolant of the first hollow tube, and the second power line is coated on the outer surface of the first hollow tube; a second hollow tube is also arranged inside the cable outer sheath. The first hollow tube and the second hollow tube are communicated through the coolant channel on the power terminal connected by the first power line to form a cooling circulation loop.

[0004] The above-mentioned cable for new energy vehicle charging makes the liquid flow inside the cable through the setting of the second hollow tube and the second hollow tube. The second hollow tube and the second hollow tube are located between the inner sheath and the cable outer sheath. To maintain the stability of the second hollow tube and the second hollow tube, personnel need to support them during the cable manufacturing process. At the same time, the second hollow tube and the second hollow tube are both arranged on the outer periphery. Therefore, the cooling effect on the outer periphery during the liquid flow is obvious, while the conductor is arranged in the middle position, and the cooling effect on the conductor is not obvious, and the cooling effect is poor. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-power liquid-cooled cable for new energy vehicle charging, so as to solve the problem that in the currently market cable for new energy vehicle charging, the cooling effect on the outer periphery is obvious during the liquid flow of the coolant, while the conductor is arranged in the middle position, and the cooling effect on the conductor is not obvious, and the cooling effect is poor mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A high-power liquid-cooled cable for new energy vehicle charging, including a sheath, a conductor and an insulating layer. The insulating layer is wrapped outside the conductor, and the sheath is wrapped outside a plurality of insulating layers. It also includes an inner liquid-cooled tube, which is located in the middle of the cable. Large grooves and small grooves are evenly arranged on the outer side of the inner liquid-cooled tube, and the large grooves and the small grooves are arranged alternately at intervals.

[0007] Preferably, an insulating layer is snap-fitted inside the large groove, and an external liquid cooling pipe is snap-fitted inside the large groove. Both the external liquid cooling pipe and the internal liquid cooling pipe are made of flexible materials.

[0008] Preferably, the outer width of the large groove is greater than the outer diameter of the insulating layer, and the outer side of the small groove is greater than the outer diameter of the external liquid cooling pipe.

[0009] Preferably, the gaps between the sheath, the internal liquid cooling pipe, the insulating layer and the external liquid cooling pipe are filled with fillers.

[0010] Preferably, the internal liquid cooling pipe and the external liquid cooling pipe are made of thermoplastic polyester elastomer, the conductor is class 6 oxygen-free bare copper, and the insulating layer is made of low-smoke, halogen-free, flame-retardant irradiated cross-linked material.

[0011] Preferably, a non-woven fabric is arranged between the outer side of the conductor and the insulating layer, and a power terminal is installed between the tops of the external liquid cooling pipe and the internal liquid cooling pipe.

[0012] Preferably, the internal structure of the cable is single-core or multi-core with or without a shielding structure.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model is provided with a large groove and a small groove. An insulating layer and an external liquid cooling pipe are respectively snap-fitted inside the large groove and the small groove. The insulating layer and the external liquid cooling pipe are fixed by the large groove and the small groove. The external liquid cooling pipe and the internal liquid cooling pipe are connected by a power terminal, so that the liquid can flow inside the external liquid cooling pipe and the internal liquid cooling pipe, and the flowing liquid cools the inside of the cable. Due to the arrangement of the large groove and the small groove, the paths of the insulating layer and the external liquid cooling pipe are limited, and multiple insulating layers can be prevented from contacting each other during the manufacturing process. The external liquid cooling pipe and the insulating layer are alternately arranged, so that the external liquid cooling pipe can absorb part of the heat and improve the heat dissipation effect of the cable.

[0015] 2. The conductor is made of the 6th kind of oxygen-free bare copper wire, which has excellent electrical conductivity, flexibility, light weight and anti-corrosion properties. The coolant pipe is made of thermoplastic polyester elastomer material. Thermoplastic polyether ester elastomer has excellent heat resistance. The higher the hardness, the better the heat resistance. In addition, polyether ester elastomer also has excellent low-temperature resistance. The brittle point of polyether ester elastomer is below -70°C, and the lower the hardness, the better the cold resistance. Most polyether ester elastomers can be used for a long time at -40°C. Due to the balanced performance of polyether ester elastomer at high and low temperatures, its working temperature range is very wide, and it can be used at -70 to 200°C. The insulation is made of low-smoke, halogen-free, flame-retardant irradiated cross-linked material, which is a wire material with excellent flame-retardant performance. Even in extreme situations such as fire, it will not burn, produce little smoke, and will not release harmful gases, greatly reducing the risk of fire. And it does not contain harmful substances such as halogens, making it more environmentally friendly. The surface of the cable is smooth and not easy to accumulate dust, making the service life of the cable longer. Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the internal liquid cooling pipe of the present utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the filler of the present utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the installation of the internal liquid cooling pipe and the external liquid cooling pipe of the present utility model;

[0019] Figure 4 It is a cross-sectional structural schematic diagram of the cable of the present utility model.

[0020] In the figure: 1, internal liquid cooling pipe; 2, large groove; 3, small groove; 4, filler; 5, power terminal; 6, external liquid cooling pipe; 7, sheath; 8, non-woven fabric; 9, insulating layer; 10, conductor. Detailed Description of the Preferred Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0023] An insulating layer 9 is snap-fitted inside the large groove 2, and an external liquid cooling pipe 6 is snap-fitted inside the large groove 2. Both the external liquid cooling pipe 6 and the internal liquid cooling pipe 1 are made of flexible materials. The internal structure of the cable is single-core or multi-core with or without a shielding structure. The outer end width of the large groove 2 is greater than the outer diameter of the insulating layer 9, and the outer side of the small groove 3 is greater than the outer diameter of the external liquid cooling pipe 6.

[0024] Through the settings of the large groove 2 and the small groove 3, the insulating layer 9 and the external liquid cooling pipe 6 can be respectively limited. During the cable manufacturing process, the insulating layer 9 and the external liquid cooling pipe 6 can be prevented from being twisted and contacting each other, which is convenient for cable processing. During the cable manufacturing process, first, the internal liquid cooling pipe 1 is manufactured. After the internal liquid cooling pipe 1 is manufactured, the large groove 2 and the small groove 3 are opened by cutting equipment. Then, the insulating layer 9 is manufactured. The sixth type of oxygen-free bare copper wire is processed into a wire of the required specification through a wire drawing process. The sixth type of oxygen-free bare copper wire has excellent electrical conductivity, softness, light weight, corrosion resistance, and resistance to high and low temperatures and oil. A non-woven fabric 8 is wrapped around the outer surface of the conductor 10. The non-woven fabric 8 can prevent the conductor 10 from loosening. The appropriate insulating material is selected according to the use of the cable, and the insulating material is coated on the outside of the conductor 10 by an extrusion method to form the insulating layer 9. The insulating layer 9 uses a low-smoke, halogen-free, flame-retardant, irradiated cross-linked material, which has excellent flame-retardant performance. Even in extreme situations such as a fire, it will not burn, produces little smoke, and does not release harmful gases, greatly reducing the risk of fire and not containing harmful substances such as halogens.

[0025] The insulating layer 9 and the external liquid cooling pipe 6 are respectively snap-fitted inside the large groove 2 and the small groove 3. Power terminals 5 are installed at the ends of the external liquid cooling pipe 6 and the internal liquid cooling pipe 1. Then, the filler 4 and the sheath 7 are respectively coated on the outside through a cable extruder, and the cable manufacturing is completed.

[0026] The liquid-cooled cable should be able to withstand the rated current and voltage, and have low transmission loss and electromagnetic interference. The liquid used in the liquid-cooled cable should have stable quality, good heat dissipation performance, and be able to quickly take away the heat around the wire and the cable.

[0027] The gaps between the sheath 7, the internal liquid cooling pipe 1, the insulating layer 9, and the external liquid cooling pipe 6 are filled with the filler 4.

[0028] A high-power liquid-cooled cable for new energy vehicle charging, comprising a sheath 7, a conductor 10, and an insulating layer 9. The insulating layer 9 is wrapped around the outside of the conductor 10, and the sheath 7 is wrapped around the outside of a plurality of insulating layers 9. It further includes an inner liquid-cooling tube 1, which is located in the middle of the cable. Large grooves 2 and small grooves 3 are evenly arranged on the outside of the inner liquid-cooling tube 1. The large grooves 2 and the small grooves 3 are arranged alternately at intervals. The inner liquid-cooling tube 1 and the outer liquid-cooling tube 6 are made of thermoplastic polyester elastomer. The conductor 10 is Class 6 oxygen-free bare copper. The insulating layer 9 uses a low-smoke, halogen-free, flame-retardant irradiated cross-linked material. A non-woven fabric 8 is arranged between the outside of the conductor 10 and the insulating layer 9. A power terminal 5 is installed between the top of the outer liquid-cooling tube 6 and the top of the inner liquid-cooling tube 1.

[0029] The liquid-cooled cable of the present invention is used for the charging gun of a new energy vehicle. A power terminal 5 is arranged inside the charging gun housing. A coolant channel is arranged on the power terminal 5. The inlet and outlet of the inner liquid-cooling tube 1 are connected to the outer liquid-cooling tube 6 to form a liquid-cooling circulation loop, which can meet the usage requirements of conductive coolant. The outer liquid-cooling tube 6 and the insulating layer 9 are arranged alternately at intervals, so that the gap between the insulating layers 9 can be enlarged. The water flow inside the outer liquid-cooling tube 6 can take away part of the heat of the insulating layer 9, so that the heat of the insulating layer 9 can be better diffused, improving the heat dissipation effect of the cable.

[0030] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cable for charging a high-power liquid-cooled new energy vehicle, comprising a sheath (7), a conductor (10) and an insulating layer (9), the insulating layer (9) being wrapped around the outside of the conductor (10), and the sheath (7) being wrapped around the outside of a plurality of insulating layers (9), characterized in that, It also includes an internal liquid cooling pipe (1) which is located in the very middle of the cable. Large grooves (2) and small grooves (3) are evenly formed on the outer side of the internal liquid cooling pipe (1), and the large grooves (2) and the small grooves (3) are arranged alternately at intervals.

2. The high-power liquid-cooled cable for new energy vehicle charging according to claim 1, characterized in that: An insulating layer (9) is clamped inside the large groove (2), and an external liquid cooling pipe (6) is clamped inside the large groove (2). Both the external liquid cooling pipe (6) and the internal liquid cooling pipe (1) are made of soft materials.

3. The high-power liquid-cooled cable for new energy vehicle charging according to claim 2, wherein: The width of the outer end of the large groove (2) is greater than the outer diameter of the insulating layer (9), and the outer side of the small groove (3) is greater than the outer diameter of the external liquid cooling pipe (6).

4. A high-power liquid-cooled cable for new energy vehicle charging according to claim 1, characterized in that: The gaps between the sheath (7), the internal liquid cooling pipe (1), the insulating layer (9) and the external liquid cooling pipe (6) are filled with fillers (4).

5. A high-power liquid-cooled cable for new energy vehicle charging according to claim 1, characterized in that: The internal liquid cooling pipe (1) and the external liquid cooling pipe (6) are made of thermoplastic polyester elastomer, the conductor (10) is Class 6 oxygen-free bare copper, and the insulating layer (9) is made of low-smoke, halogen-free, flame-retardant irradiated cross-linked material.

6. A high-power liquid-cooled cable for new energy vehicle charging according to claim 1, characterized in that: A non-woven fabric (8) is arranged between the outer side of the conductor (10) and the insulating layer (9), and a power terminal (5) is installed between the tops of the external liquid cooling pipe (6) and the internal liquid cooling pipe (1).

7. A high-power liquid-cooled cable for new energy vehicle charging according to claim 1, characterized in that: The internal structure of the cable is a single-core or multi-core structure with or without shielding.

Images