High-power low-temperature-rise liquid cooling charging pile cable

Abstract

The invention relates to a high-power low-temperature-rise liquid cooling charging pile cable, which comprises a sheath tube, and a first main line tube, a second main line tube, a first liquid cooling tube, a second liquid cooling tube, an auxiliary line group, a ground wire, a first signal line group and a second signal line group which are arranged in the sheath tube, in the cross section of the liquid cooling charging pile cable, the first main wire pipe and the second main wire pipe are arranged in parallel and divide the space in the sheath into a first side and a second side; the first liquid cooling pipe is arranged on the first side and close to the first main line pipe, the second liquid cooling pipe is arranged on the first side and close to the second main line pipe, the auxiliary line set is arranged on the first side and located among the first main line pipe, the second main line pipe, the first liquid cooling pipe and the second liquid cooling pipe, and the diameter of any one of the first liquid cooling pipe and the second liquid cooling pipe is larger than that of the auxiliary line set. The liquid-cooled charging pile cable can be ensured to be cooled during high-power charging, and the problem that the temperature rise is too high during quick charging is solved.

Description

Technical Field

[0001] The present invention relates to the field of cables, and in particular to a high-power, low-temperature rise, liquid-cooled charging pile cable. Background Art

[0002] Compared with traditional cars, new energy vehicles have the advantages of environmental protection, energy saving, and low maintenance costs. As consumers' environmental awareness continues to improve, new energy vehicles will become the choice of more and more consumers, and the number of new energy vehicles is increasing rapidly. However, compared with the refueling time of traditional gasoline vehicles of several minutes, the charging time of new energy vehicles is longer, about several hours, and people's requirements for the battery life and charging speed of new energy vehicles are further improved.

[0003] In order to save charging time, the current technical means are mainly to achieve fast charging by increasing the charging current, which will increase the energy loss of the wires. Fast charging will input a large amount of electricity into the battery in a short period of time, which will cause the cable to generate a lot of heat. If the heat cannot be dissipated in time, the temperature inside the charging pile will be too high, which will affect the charging efficiency, shorten the service life of the charging pile, and even cause a fire. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a high-power, low-temperature-rise liquid-cooled charging pile cable, which can ensure that the cable remains cooled during high-power charging, thereby solving the problem of excessive temperature rise during high-power charging in the prior art.

[0005] To achieve the purpose of the present invention, the present invention provides a high-power, low-temperature-rise liquid-cooled charging pile cable, which includes a sheath tube and a first main line tube, a second main line tube, a first liquid-cooling tube, a second liquid-cooling tube, an auxiliary line group, a ground wire, a first signal line group and a second signal line group arranged in the sheath tube; in the cross-section of the liquid-cooled charging pile cable, the first main line tube and the second main line tube are arranged side by side and divide the space in the sheath into a first side and a second side; the first liquid-cooling tube is arranged on the first side and close to the first main line tube, the second liquid-cooling tube is arranged on the first side and close to the second main line tube, the auxiliary line group is arranged on the first side and is located between the first main line tube, the second main line tube, the first liquid-cooling tube and the second liquid-cooling tube, and the diameter of any one of the first liquid-cooling tube and the second liquid-cooling tube is larger than the diameter of the auxiliary line group; the ground wire, the first signal line group and the second signal line group are arranged on the second side.

[0006] In some embodiments of the present invention, the first main line pipe and the second main line pipe respectively include a hose and a main line core located in the hose, and a liquid cooling channel is formed between the hose and the main line core; the liquid cooling channel of the first main line pipe is connected to the first liquid cooling pipe, and the liquid cooling channel of the second main line pipe is connected to the second liquid cooling pipe.

[0007] In some embodiments of the present invention, the inner diameter of either the first liquid cooling tube or the second liquid cooling tube is 5.3-5.6 mm, the inner diameter of the hose is 12.5-13.5 mm, and the cross-sectional area of ​​the main line core is 49-52 mm. 2 .

[0008] In some embodiments of the present invention, the outer diameter of any one of the first liquid cooling tube and the second liquid cooling tube is 7.8-8.2 mm, and the outer diameter of the hose is 15.6-16.5 mm.

[0009] In some embodiments of the present invention, the outer diameter of the sheath tube is 38-44 mm, and the thickness of the sheath tube is 2.9-4 mm.

[0010] In some embodiments of the present invention, the first liquid cooling tube contacts the first main line tube, the second liquid cooling tube contacts the second main line tube, and the first main line tube and the second main line tube contact the inner wall of the jacket tube respectively.

[0011] In some embodiments of the present invention, the auxiliary line group is in contact with the first liquid-cooling tube and the second liquid-cooling tube respectively.

[0012] In some embodiments of the present invention, the auxiliary line group includes four twisted auxiliary power lines wrapped by a first non-woven fabric layer.

[0013] In some embodiments of the present invention, any one of the first signal line group and the second signal line group includes a shielding layer and two signal lines wrapped by the shielding layer.

[0014] In some embodiments of the present invention, an outer diameter of any one of the first signal line group and the second signal line group is 6-8 mm.

[0015] In some embodiments of the present invention, the shielding layer includes an aluminum foil layer and a woven copper mesh layer wrapped around the outside of the aluminum foil layer, and the shielding rate of the woven copper mesh layer is greater than 80%.

[0016] In some embodiments of the present invention, the ground wire comprises a ground wire core and an insulating layer wrapping the ground wire core; the cross-sectional area of ​​the ground wire core is 24-26mm 2 ; The thickness of the insulating layer is 0.7-1mm.

[0017] In some embodiments of the present invention, the first signal line group is in contact with the first main line tube, the second signal line group is in contact with the second main line tube, and the ground line is located between the first main line tube, the second main line tube, the first signal line group and the second signal line group and is in contact with any one of the first main line tube, the second main line tube, the first signal line group and the second signal line group.

[0018] In some embodiments of the present invention, the liquid-cooled charging pile cable also includes a filler, and the filler is filled between any two of the sheath tube, the first main line tube, the second main line tube, the first liquid cooling tube, the second liquid cooling tube, the auxiliary line group, the ground wire, the first signal line group and the second signal line group; the liquid-cooled charging pile cable also includes a second non-woven fabric layer, and the second non-woven fabric layer wraps the first main line tube, the second main line tube, the first liquid cooling tube, the second liquid cooling tube, the auxiliary line group, the ground wire, the first signal line group, the second signal line group and the filler.

[0019] In some embodiments of the present invention, the operating voltage of the liquid-cooled charging pile cable is 800-1500V, the operating current is above 900A, and the operating temperature is -40 to 105°C.

[0020] In some embodiments of the present invention, the first main line tube is a DC+ main line tube, and the second main line tube is a DC- main line tube.

[0021] In some embodiments of the present invention, the weight of the liquid-cooled charging pile cable is 1.1-1.4 kg per meter.

[0022] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0023] The cable core of the liquid-cooled charging pile cable of the present invention is mainly composed of a first main line tube, a second main line tube, a first liquid cooling tube, a second liquid cooling tube, an auxiliary line group, a ground wire, a first signal line group and a second signal line group, wherein the first liquid cooling tube, the second liquid cooling tube and the auxiliary line group are located on the same side of the first liquid cooling tube and the second liquid cooling tube, and the liquid cooling tube is divided into two tubes, which are respectively arranged near the two main line tubes, and the diameter of the first liquid cooling tube and the diameter of the second liquid cooling tube are larger than the diameter of the auxiliary line group, which provides a larger space for the circulation of the coolant, so as to achieve better liquid cooling. When the liquid-cooled charging pile of the present invention works at a charging voltage of 800V and a current of 1000A, the temperature rise in 1 hour is less than 40°C, thereby ensuring that the cable remains cool during high-power charging, solving the problem of excessive temperature rise in high-power charging in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the liquid-cooled charging pile cable of the present invention.

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation modes. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, the present invention provides a liquid-cooled charging pile cable mainly used for charging piles of new energy vehicles, especially for fast charging charging piles. The liquid-cooled charging pile cable mainly includes a sheath tube 10, a first main line tube 20, a second main line tube 30, a first liquid cooling tube 40, a second liquid cooling tube 50, an auxiliary line group 60, a ground line 70, a first signal line group 80 and a second signal line group 90. The first main line tube 20, the second main line tube 30, the first liquid cooling tube 40, the second liquid cooling tube 50, the auxiliary line group 60, the ground line 70, the first signal line group 80 and the second signal line group 90 are arranged in the sheath tube 10 and extend along the length direction of the sheath tube 10. The sheath tube 10 integrates the first main line tube 20, the second main line tube 30, the first liquid cooling tube 40, the second liquid cooling tube 50, the auxiliary line group 60, the ground line 70, the first signal line group 80 and the second signal line group 90 into an integral cable and provides protection. The sheath tube 10 may be made of a flame-retardant thermoplastic elastomer, such as flame-retardant polyurethane, which has good flexibility, is resistant to high temperatures, is recyclable, and is more environmentally friendly.

[0027] In the cross section of the liquid-cooled charging pile cable, the first main line tube 20 and the second main line tube 30 are arranged in parallel, and the space in the sheath tube 10 is divided into a first side 11 and a second side 12. The first side 11 and the second side 12 can be two spaces divided by the line connecting the center of the first main line tube 20 and the center of the second main line tube 30. The first main line tube 20 and the second main line tube 30 are arranged in parallel along the diameter direction of the sheath tube 10, so that the first main line tube 20 and the second main line tube 30 with a larger cross-sectional area can be evenly distributed in the sheath tube 10, thereby reducing the cross-sectional area of ​​the liquid-cooled charging pile cable. The diameter (outer diameter) of any one of the first main line tube 20 and the second main line tube 30 is greater than the diameter (outer diameter) of any one of the first liquid cooling tube 40, the second liquid cooling tube 50, the auxiliary line group 60, the ground line 70, the first signal line group 80 and the second signal line group 90, so that the cable has a larger current carrying capacity, can allow a larger current to pass, and achieve fast charging.

[0028] The first liquid cooling tube 40 is arranged on the first side and close to the first main line tube 20, the second liquid cooling tube 50 is arranged on the first side and close to the second main line tube 30, and the auxiliary line group 60 is arranged on the first side and located between the first main line tube 20, the second main line tube 30, the first liquid cooling tube 40 and the second liquid cooling tube 50, so that the layout of the first main line tube 20, the second main line tube 30, the first liquid cooling tube 40, the second liquid cooling tube 50 and the auxiliary line group 60 is more compact, reducing the size of the liquid-cooled charging pile cable. The ground wire 70, the first signal line group 80 and the second signal line group 90 are arranged on the second side, so that the layout of various wires in the liquid-cooled charging pile cable is more reasonable, reducing the size of the liquid-cooled charging pile cable.

[0029] Among them, the diameter (outer diameter) of any one of the first liquid cooling tube 40 and the second liquid cooling tube 50 is greater than the diameter (outer diameter) of the auxiliary line group 60. The first liquid cooling tube 40 and the second liquid cooling tube 50 can accommodate more coolant, which can provide more coolant flowing through the first main line tube 20 and the second main line tube 30, and the first liquid cooling tube 40 and the second liquid cooling tube 50 have a larger surface area, which can absorb more heat from the first main line tube 20, the second main line tube 30 and the auxiliary line group 60 through heat conduction. It can be seen from the above that the liquid-cooled charging pile cable of this embodiment can cool and dissipate heat well, ensuring that the cable remains cool during high-power charging, solving the problem of excessive temperature rise during high-power charging in the prior art.

[0030] In some examples, the first main line pipe 20 and the second main line pipe 30 respectively include a hose 21 and a main line core 22 located in the hose 21, and a liquid cooling channel 23 is formed between the hose 21 and the main line core 22, and the liquid cooling channel 23 is used for cooling liquid to pass through. The hose 21 can be an insulated polyolefin hose, and the main line core 22 can be formed by twisting a plurality of copper wires wrapped by an insulating layer. The liquid cooling channel 23 of the first main line pipe 20 is connected to the first liquid cooling pipe 40, and the liquid cooling channel 23 of the second main line pipe 30 is connected to the second liquid cooling pipe 50. Part of the cooling liquid can be driven by a pump to circulate between the liquid cooling channel 23 of the first main line pipe 20 and the first liquid cooling pipe 40, and the other part of the cooling liquid can be driven by another pump to circulate between the liquid cooling channel 23 of the second main line pipe 30 and the second liquid cooling pipe 50. The first main line pipe 20 and the second main line pipe 30 can be DC+ and DC- pipes respectively, and the coolants of the two are set separately to avoid the contact between the first main line pipe 20 and the second main line pipe 30 through the coolant, which can better prevent the coolant from being affected by different currents and deteriorating, and also reduce the risk of short circuit of the main line pipe. In some examples, in the first main line pipe 20 and the second main line pipe 30, the coolant flow direction in the liquid cooling channel 23 is opposite to the current direction of the corresponding main line core 22 and the same as the electron movement direction of the corresponding main line core 22, or the coolant flow direction in the liquid cooling channel 23 is the same as the current direction of the corresponding main line core 22 and the opposite to the electron movement direction of the corresponding main line core 22, so that the coolant flow directions of the first main line pipe 20 and the second main line pipe 30 are opposite, and the coolant flow directions of the first liquid cooling pipe 40 and the second liquid cooling pipe 50 are opposite, so that the cable temperature distribution along the length of the cable is more uniform, and the local overheating of the cable is avoided. Either the first liquid cooling pipe 40 or the second liquid cooling pipe 50 can be an insulating polyolefin flexible pipe.

[0031] In some examples, the inner diameter of either the first liquid cooling tube 40 or the second liquid cooling tube 50 is 5.3-5.6 mm, the inner diameter of the hose 21 is 12.5-13.5 mm, and the cross-sectional area of ​​the main line core 22 is 49-52 mm 2 The first liquid cooling tube 40 and the second liquid cooling tube 50 have a larger inner diameter, which can accommodate more cooling liquid. There is a liquid cooling channel 23 between the hose 21 and the main line core 22 of the first main line tube 20 and the second main line tube 30. The cross-sectional area of ​​the liquid cooling channel 23 of any main line tube is equivalent to the coolant flow cross-sectional area defined by any inner diameter of the first liquid cooling tube 40 and the second liquid cooling tube 50, which meets the cooling requirements and can reduce the cross-sectional area of ​​the cable.

[0032] In some examples, the outer diameter of any one of the first liquid cooling tube 40 and the second liquid cooling tube 50 is 7.8-8.2 mm, the outer diameter of the hose 21 is 15.6-16.5 mm, the first liquid cooling tube 40, the second liquid cooling tube 50 and the hose 21 have sufficient thickness, and the tube wall has sufficient strength to prevent leakage after long-term use.

[0033] In some examples, the outer diameter of the sheath tube 10 is 38-44 mm, such as 39.5-41.5 mm, and the thickness of the sheath tube 10 is 2.9-4 mm. The sheath tube 10 has sufficient thickness, is wear-resistant and stretch-resistant, and is not easily damaged during long-term use, thus playing a better protective role.

[0034] In some examples, the first liquid cooling tube 40 contacts the first main line tube 20, the second liquid cooling tube 50 contacts the second main line tube 30, and the first main line tube 20 and the second main line tube 30 respectively contact the inner wall of the sheath tube, so that the cable structure is more compact, and the heat of the main line tube can be better transferred to the first liquid cooling tube 40, the second liquid cooling tube 50 and the outside of the cable, so as to better cool and dissipate heat.

[0035] In some examples, the auxiliary wire group 60 is in contact with the first liquid cooling tube 40 and the second liquid cooling tube 50, respectively. The auxiliary wire group 60 is used to provide a supplementary voltage when the voltage provided by the main line tube is unstable. When the auxiliary wire group 60 provides the supplementary voltage, a supplementary current will flow through the auxiliary wire group 60 and generate heat. The auxiliary wire group 60 is in contact with the first liquid cooling tube 40 and the second liquid cooling tube 50, respectively, which can better transfer heat to the first liquid cooling tube 40 and the second liquid cooling tube 50. Since the diameter of any one of the first liquid cooling tube 40 and the second liquid cooling tube 50 is larger than the auxiliary wire group 60, the auxiliary wire group 60 can better cool and dissipate heat.

[0036] In some examples, the auxiliary line group 60 includes four twisted auxiliary power lines 62 wrapped by a first non-woven fabric layer 61 , and the first non-woven fabric layer 61 can prevent the auxiliary power lines 62 from spreading.

[0037] In some examples, the overall diameter of the auxiliary wire group 60 is 5-8 mm, and a plurality of auxiliary power wires 62 are twisted to form the outer diameter of the auxiliary wire group 60 .

[0038] In some examples, any one of the first signal line group 80 and the second signal line group 90 includes a shielding layer and two signal lines 81 wrapped by the shielding layer, and the shielding layer can prevent the signal line 81 from being affected by electromagnetic waves. The outer diameter of any one of the first signal line group 80 and the second signal line group 90 can be 6-8 mm. The shielding layer includes an aluminum foil layer 82 and a braided copper mesh layer 83 wrapped outside the aluminum foil layer 82, and the shielding rate of the braided copper mesh layer 83 is greater than 80%. The use of two layers of shielding layers can further shield external electromagnetic influences and have higher strength.

[0039] In some examples, the ground wire 70 includes a ground wire core 71 and an insulating layer 72 that wraps the ground wire core 71. The cross-sectional area of ​​the ground wire core 71 is 24-26 mm. 2 The thickness of the insulating layer 72 is 0.7-1 mm. The ground wire core 71 can prevent cable leakage. The insulating layer 72 can be made of flame-retardant thermoplastic elastomer.

[0040] In some examples, the first signal line group 80 contacts the first main line tube 20, the second signal line group 90 contacts the second main line tube 30, and the ground wire 70 is located between the first main line tube 20, the second main line tube 30, the first signal line group 80, and the second signal line group 90 and contacts any one of the first main line tube 20, the second main line tube 30, the first signal line group 80, and the second signal line group 90, making the structure of the cable more compact.

[0041] In some examples, the liquid-cooled charging pile cable also includes a filler 100, which is filled between any two of the sheath tube 10, the first main line tube 20, the second main line tube 30, the first liquid cooling tube 40, the second liquid cooling tube 50, the auxiliary line group 60, the ground wire 70, the first signal line group 80 and the second signal line group 90 to fill the gaps between the wires, thereby improving the strength of the cable and preventing the wires from loosening and deforming.

[0042] In some examples, the liquid-cooled charging pile cable also includes a second non-woven fabric layer 110, which wraps the first main line tube 20, the second main line tube 30, the first liquid cooling tube 40, the second liquid cooling tube 50, the auxiliary line group 60, the ground wire 70, the first signal line group 80 and the second signal line group 90 and the filler 100 to avoid the dispersion of the wires and help simplify the process of wrapping the sheath tube 10.

[0043] In some examples, the filler 100 is a thermally conductive filler, for example, the thermally conductive filler is a PP tape, which extends along the length direction of the cable and is wound together with the first main line tube 20, the second main line tube 30, the first liquid cooling tube 40, the second liquid cooling tube 50, the auxiliary line group 60, the ground line 70, the first signal line group 80 and the second signal line group 90 for easy filling. The PP tape can be made of PP material containing thermally conductive fillers, and the thermally conductive fillers can account for 50-80% of the total mass of the PP tape. The thermally conductive fillers can be thermally conductive non-conductive materials, such as aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride, silicon carbide, silicon powder, etc. The thermally conductive PP tape can play a good role in heat conduction between the various wires.

[0044] In some examples, the operating voltage of the liquid-cooled charging pile cable is 800-1500V, the operating current is above 900A, and the operating temperature is -40 to 105°C. The liquid-cooled charging pile cable of this embodiment can be applied to high-power scenarios and is resistant to high temperatures.

[0045] In some examples, the weight of the liquid-cooled charging pile cable is 1.1-1.4 kg per meter. The liquid-cooled charging pile cable can increase the current carrying capacity while maintaining a suitable weight.

[0046] In some examples, the temperature rise of the liquid-cooled charging pile cable is less than 40°C during one hour of charging, ensuring that the cable remains cool during high-power charging, solving the problem of excessive temperature rise during high-power charging in the prior art.

[0047] The parameters such as diameter, inner diameter, outer diameter, cross-sectional area, thickness, etc. in this embodiment may all be average values.

[0048] To further illustrate the technical effect of the liquid-cooled charging pile cable of this embodiment, the liquid-cooled charging pile cable of this application will be subjected to a high-power working test below. The working voltage is 800V, the working current is 1000A, and the coolant flow rate varies between 12-17L / min.

[0049] In the embodiment 1, the inner diameter of the first liquid cooling tube 40 and the second liquid cooling tube 50 is 5.5 mm, and the outer diameter is 8 mm; the inner diameter of the hose 21 of the first main line tube 20 and the second main line tube 30 is 13 mm, the outer diameter is 16 mm, and the cross-sectional area of ​​the main line core 22 is 50 mm. 2 The outer diameter of the sheath tube 10 is 41 mm, and the thickness of the sheath tube 10 is 3.9 mm; the outer diameter of either the first signal line group 80 or the second signal line group 90 is 7 mm. The cross-sectional area of ​​the ground wire core 71 is 25 mm 2 , the thickness of the insulating layer 72 is 0.7 mm.

[0050] In Example 2, the inner diameter of any one of the first liquid cooling tube 40 and the second liquid cooling tube 50 is 6 mm, and the outer diameter is 9 mm; the inner diameter of the hose 21 of any one of the first main line tube 20 and the second main line tube 30 is 14 mm, the outer diameter is 17 mm, and the cross-sectional area of ​​the main line core 22 is 50 mm 2 The outer diameter of the sheath tube 10 is 41 mm, and the thickness of the sheath tube 10 is 3.9 mm; the outer diameter of either the first signal line group 80 or the second signal line group 90 is 7 mm. The cross-sectional area of ​​the ground wire core 71 is 25 mm 2 , the thickness of the insulating layer 72 is 0.7 mm.

[0051] In Example 3, the inner diameter of any one of the first liquid cooling tube 40 and the second liquid cooling tube 50 is 5 mm, and the outer diameter is 8 mm; the inner diameter of the hose 21 of any one of the first main line tube 20 and the second main line tube 30 is 12 mm, the outer diameter is 15 mm, and the cross-sectional area of ​​the main line core 22 is 42 mm 2 The outer diameter of the sheath tube 10 is 41 mm, and the thickness of the sheath tube 10 is 3.9 mm; the outer diameter of either the first signal line group 80 or the second signal line group 90 is 7 mm. The cross-sectional area of ​​the ground wire core 71 is 25 mm 2 , the thickness of the insulating layer 72 is 0.7 mm.

[0052] Each embodiment was tested in the same manner, and the results are shown in the following table: DC+ is the first main line pipe 20 , DC- is the second main line pipe 30 , and the coolant is the average temperature of the liquid in the first liquid cooling pipe 40 and the second liquid cooling pipe 50 .

[0053]

[0054]

[0055] It can be seen from the above that the cable of this embodiment can achieve the technical effect of high power and low temperature rise. The effect of embodiment 1 is better than that of other embodiments.

[0056] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-power low-temperature rise liquid-cooled charging pile cable, characterized in that It includes a sheath tube and a first main line tube, a second main line tube, a first liquid cooling tube, a second liquid cooling tube, an auxiliary line group, a ground wire, a first signal line group and a second signal line group arranged in the sheath tube; in the cross section of the liquid-cooled charging pile cable, the first main line tube and the second main line tube are arranged side by side and divide the space in the sheath tube into a first side and a second side; the first liquid cooling tube is arranged on the first side and close to the first main line tube, the second liquid cooling tube is arranged on the first side and close to the second main line tube, the auxiliary line group is arranged on the first side and is located between the first main line tube, the second main line tube, the first liquid cooling tube and the second liquid cooling tube, and the diameter of any one of the first liquid cooling tube and the second liquid cooling tube is larger than the diameter of the auxiliary line group; the ground wire, the first signal line group and the second signal line group are arranged on the second side.

2. A high-power low-temperature rise liquid-cooled charging pile cable according to claim 1, characterized in that The first main line pipe and the second main line pipe respectively include a hose and a main line core located in the hose, and a liquid cooling channel is formed between the hose and the main line core; the liquid cooling channel of the first main line pipe is connected to the first liquid cooling pipe, and the liquid cooling channel of the second main line pipe is connected to the second liquid cooling pipe.

3. A high-power low-temperature rise liquid-cooled charging pile cable according to claim 2, characterized in that The inner diameter of either the first liquid cooling tube or the second liquid cooling tube is 5.3-5.6 mm, the inner diameter of the hose is 12.5-13.5 mm, and the cross-sectional area of ​​the main line core is 49-52 mm 2 .

4. A high-power low-temperature rise liquid-cooled charging pile cable according to claim 3, characterized in that The outer diameter of any one of the first liquid cooling tube and the second liquid cooling tube is 7.8-8.2 mm, and the outer diameter of the hose is 15.6-16.5 mm; and / or The outer diameter of the sheath tube is 38-44 mm, and the thickness of the sheath tube is 2.9-4 mm; and / or The first liquid cooling tube is in contact with the first main line tube, the second liquid cooling tube is in contact with the second main line tube, and the first main line tube and the second main line tube are in contact with the inner wall of the jacket tube respectively.

5. A high-power low-temperature rise liquid-cooled charging pile cable according to any one of claims 1 to 4, characterized in that The auxiliary line group is in contact with the first liquid cooling tube and the second liquid cooling tube respectively; and / or The auxiliary line group includes four twisted auxiliary power lines wrapped by a first non-woven fabric layer.

6. A high-power low-temperature rise liquid-cooled charging pile cable according to any one of claims 1 to 4, characterized in that Either the first signal line group or the second signal line group comprises a shielding layer and two signal lines wrapped by the shielding layer; and / or An outer diameter of any one of the first signal line group and the second signal line group is 6-8 mm.

7. A high-power low-temperature rise liquid-cooled charging pile cable according to claim 6, characterized in that The shielding layer comprises an aluminum foil layer and a braided copper mesh layer wrapped outside the aluminum foil layer, and the shielding rate of the braided copper mesh layer is greater than 80%.

8. A high-power low-temperature rise liquid-cooled charging pile cable according to any one of claims 1 to 4, characterized in that The ground wire includes a ground wire core and an insulating layer wrapping the ground wire core; the cross-sectional area of ​​the ground wire core is 24-26mm 2 ; The thickness of the insulating layer is 0.7-1mm.

9. A high-power low-temperature rise liquid-cooled charging pile cable according to any one of claims 1 to 4, characterized in that The first signal line group is in contact with the first main line tube, the second signal line group is in contact with the second main line tube, and the ground line is located between the first main line tube, the second main line tube, the first signal line group and the second signal line group and is in contact with any one of the first main line tube, the second main line tube, the first signal line group and the second signal line group.

10. A high-power low-temperature rise liquid-cooled charging pile cable according to any one of claims 1 to 4, characterized in that The liquid-cooled charging pile cable also includes a filler, and the filler is filled between any two of the sheath tube, the first main line tube, the second main line tube, the first liquid cooling tube, the second liquid cooling tube, the auxiliary line group, the ground wire, the first signal line group, and the second signal line group; the liquid-cooled charging pile cable also includes a second non-woven fabric layer, and the second non-woven fabric layer wraps the first main line tube, the second main line tube, the first liquid cooling tube, the second liquid cooling tube, the auxiliary line group, the ground wire, the first signal line group, the second signal line group and the filler; the filler is a thermally conductive filler; and / or The working voltage of the liquid-cooled charging pile cable is 800-1500V, the working current is above 900A, and the working temperature is -40 to 105°C; and / or The first main line tube is a DC+ main line tube, and the second main line tube is a DC- main line tube; and / or The weight of the liquid-cooled charging pile cable is 1.1-1.4 kg per meter; and / or The temperature rise of the liquid-cooled charging pile cable is less than 40°C during charging for one hour.

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