Coaxial liquid cooling charging cable and charging pile

Abstract

The utility model belongs to the technical field of charging cable manufacturing, and discloses a coaxial liquid cooling charging cable and a charging pile, the coaxial liquid cooling charging cable comprises a first liquid cooling pipe, a first conductor layer, a support member, a second liquid cooling pipe, a second conductor layer, an insulating layer and a sheath layer, the first liquid cooling pipe is filled with first cooling liquid, and the second liquid cooling pipe is filled with second cooling liquid. The first conductor layer wraps the periphery of the first liquid cooling pipe, the second liquid cooling pipe sleeves the periphery of the first conductor layer, the support member is abutted between the first conductor layer and the inner wall of the second liquid cooling pipe, second cooling liquid circulates in the second liquid cooling pipe, the second cooling liquid has insulativity, the second conductor layer wraps the periphery of the second liquid cooling pipe, and the second conductor layer is abutted between the first conductor layer and the inner wall of the second liquid cooling pipe. The insulating layer wraps the periphery of the second conductor layer, and the sheath layer sleeves the periphery of the insulating layer. The shaft liquid cooling charging cable provided by the utility model is good in heat dissipation capability, high in use safety, relatively thin in overall wire diameter, convenient for a vehicle owner to take and good in use experience for the vehicle owner.

Description

Technical Field

[0001] The utility model relates to the technical field of charging cable manufacturing, and in particular to a coaxial liquid-cooled charging cable and a charging pile. Background Art

[0002] With the development of new energy, new energy vehicles are becoming increasingly popular and becoming a popular means of transportation. However, charging the batteries in new energy vehicles requires drivers to wait for a significant amount of time. Consequently, the charging time of new energy vehicles is becoming increasingly important to consumers, who expect their vehicles to charge quickly. Consequently, the demand for high-power charging stations is growing. To ensure the safety of charging cables, existing high-power charging stations mostly use liquid-cooled cables. However, these cables have poor heat dissipation and are relatively unsafe to use. Furthermore, their thicker wire diameter makes them difficult for drivers to handle, resulting in a poor user experience.

[0003] Therefore, there is an urgent need for a coaxial liquid-cooled charging cable and a charging pile to solve the above technical problems. Utility Model Content

[0004] The first purpose of the present utility model is to provide a coaxial liquid-cooled charging cable, which can solve the problems of poor heat dissipation effect of existing liquid-cooled charging cables, relatively poor safety of use, and thicker overall wire diameter, which makes it inconvenient for car owners to pick up and leads to poor user experience for car owners.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A coaxial liquid-cooled charging cable, comprising:

[0007] a first liquid cooling tube filled with a first coolant;

[0008] a first conductor layer, disposed on the outer periphery of the first liquid cooling tube;

[0009] a support member and a second liquid cooling tube, wherein the second liquid cooling tube is sleeved on the outer periphery of the first conductor layer, the support member abuts between the first conductor layer and the inner wall of the second liquid cooling tube, and a second coolant flows in the second liquid cooling tube, and the second coolant has insulating properties;

[0010] a second conductor layer, the second conductor layer being coated on an outer circumference of the second liquid cooling tube;

[0011] an insulating layer, the insulating layer covering an outer periphery of the second conductive layer;

[0012] The sheath layer is sleeved on the outer periphery of the insulating layer.

[0013] As an optimal technical solution for a coaxial liquid-cooled charging cable, the first conductor layer is formed by a plurality of copper conductors spirally twisted around the outer circumference of the first liquid-cooling tube, and the pitch-to-diameter ratio of the twisted plurality of copper conductors is 11 to 13 times.

[0014] As a preferred technical solution of the coaxial liquid-cooled charging cable, the coaxial liquid-cooled charging cable further includes a first wrapping layer, which is wrapped around the outer circumference of the first conductor layer, and the support member abuts against the first wrapping layer.

[0015] As an optimal technical solution for the coaxial liquid-cooled charging cable, the coaxial liquid-cooled charging cable further includes a signal line, which is located between the insulation layer and the sheath layer.

[0016] As an optimal technical solution for the coaxial liquid-cooled charging cable, the coaxial liquid-cooled charging cable further includes a shielding layer, which is wrapped around the outer periphery of the insulating layer and adheres to the signal line.

[0017] As an optimal technical solution for the coaxial liquid-cooled charging cable, the coaxial liquid-cooled charging cable further includes a filling strip, which is twisted together with the signal line and spirally wound around the outer circumference of the shielding layer.

[0018] As a preferred technical solution of the coaxial liquid-cooled charging cable, the coaxial liquid-cooled charging cable further includes a second wrapping layer, which is wrapped around the outer circumference of the signal line and the filling strip.

[0019] As an optimal technical solution for the coaxial liquid-cooled charging cable, a plurality of the support members are provided, and the plurality of support members are spaced apart between the outer periphery of the second conductor layer and the inner wall of the second liquid-cooling tube.

[0020] As an optimal technical solution for the coaxial liquid-cooled charging cable, the second conductor layer is formed by spirally winding a copper tape around the outer circumference of the second liquid-cooling tube.

[0021] The second purpose of the present invention is to provide a charging pile. To achieve this purpose, the present invention adopts the following technical solutions:

[0022] A charging pile, comprising the coaxial liquid-cooled charging cable described in any one of the above items.

[0023] The beneficial effects of the utility model are:

[0024] The coaxial liquid-cooled charging cable provided by the present invention can achieve dual heat dissipation of the first conductor layer by wrapping the first conductor layer around the outer periphery of the first liquid-cooling tube and immersing the first conductor layer in the insulating second coolant in the second liquid-cooling tube. At the same time, the second conductor layer is wrapped around the outer periphery of the second liquid-cooling tube, and the second coolant can dissipate heat for the second conductor layer, so that the heat dissipation of the first conductor layer and the heat dissipation of the second conductor layer are both guaranteed, and the safety of the coaxial liquid-cooled charging cable is guaranteed; a support is provided between the first conductor layer and the second liquid-cooling tube to prevent the second liquid-cooling tube from being damaged after the second coolant circulates. Now it collapses, so that the second coolant can fully immerse the first conductor layer, thereby improving the heat dissipation performance of the coaxial liquid-cooled charging cable; since the first conductor layer is doubly cooled by the first coolant and the second coolant, its overall heat dissipation effect is better than that of the second conductor layer. When manufacturing the coaxial liquid-cooled charging cable, the cross-sectional area of the first conductor layer can be made smaller than the cross-sectional area of the second conductor layer. Since the first conductor layer is located in the middle area, the overall wire diameter of the coaxial liquid-cooled charging cable can be significantly reduced. The coaxial liquid-cooled charging cable is relatively thinner as a whole, which is convenient for car owners to pick up and gives car owners a good user experience.

[0025] The charging pile provided by the utility model can realize fast charging of new energy vehicles. The coaxial liquid-cooled charging cable used therein has good heat dissipation performance and high safety in use. At the same time, the diameter is relatively thinner, making it easier for car owners to pick up. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the coaxial liquid-cooled charging cable provided by the present invention;

[0027] Figure 2 It is a flow chart of the preparation method of the coaxial liquid-cooled charging cable provided by the present invention.

[0028] In the picture:

[0029] 1. First liquid cooling tube; 2. First conductor layer; 3. Support member; 4. Second liquid cooling tube; 5. Second conductor layer; 6. Insulation layer; 7. Sheath layer; 8. First wrapping layer; 9. Signal line; 10. Shielding layer; 11. Filling strip; 12. Second wrapping layer. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0031] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment provides a coaxial liquid-cooled charging cable, including a first liquid-cooling tube 1, a first conductor layer 2, a support member 3, a second liquid-cooling tube 4, a second conductor layer 5, an insulating layer 6 and a sheath layer 7, wherein the interior of the first liquid-cooling tube 1 is filled with a first coolant, the first conductor layer 2 is coated on the outer periphery of the first liquid-cooling tube 1, the second liquid-cooling tube 4 is sleeved on the outer periphery of the first conductor layer 2, the support member 3 is abutted between the inner walls of the first conductor layer 2 and the second liquid-cooling tube 4, the second liquid-cooling tube 4 is circulated with the second coolant, and the second coolant is insulating. The support member 3 can support the second liquid-cooling tube 4 to avoid deformation or collapse of the second liquid-cooling tube 4 after the second coolant circulates; the second conductor layer 5 is coated on the outer periphery of the second liquid-cooling tube 4.

[0036] Because the first conductor layer 2 is located in the center of the coaxial liquid-cooled charging cable and is a solid structure, while the second conductor layer 5 is located at the periphery of the coaxial liquid-cooled charging cable, the heat dissipation effect of the first conductor layer 2 is lower than that of the second conductor layer 5 in terms of structure and layout. By wrapping the first conductor layer 2 around the periphery of the first liquid-cooling tube 1 and immersing the first conductor layer 2 in the insulating second coolant in the second liquid-cooling tube 4, dual heat dissipation of the first conductor layer 2 is achieved. At the same time, the second conductor layer 5 is wrapped around the periphery of the second liquid-cooling tube 4, and the second coolant dissipates heat from the second conductor layer 5, ensuring heat dissipation of both the first conductor layer 2 and the second conductor layer 5, thus ensuring the safety of the coaxial liquid-cooled charging cable. The support member 3 is provided between the first conductor layer 2 and the second liquid-cooling tube 4 to prevent the second liquid-cooling tube 4 from collapsing after the second coolant flows through it, ensuring that the second coolant fully immerses the first conductor layer 2, thus improving the heat dissipation performance of the coaxial liquid-cooled charging cable. Since the first conductor layer 2 dissipates heat dually by the first coolant and the second coolant, its overall heat dissipation effect is better than that of the second conductor layer 5. When manufacturing a coaxial liquid-cooled charging cable, the cross-sectional area of the first conductor layer 2 can be made smaller than the cross-sectional area of the second conductor layer 5. Since the first conductor layer 2 is located in the middle area, the overall wire diameter of the coaxial liquid-cooled charging cable can be significantly reduced. The coaxial liquid-cooled charging cable is relatively thinner as a whole, which is convenient for car owners to pick up and gives car owners a good user experience.

[0037] The insulating layer 6 wraps around the outer periphery of the second conductive layer 5, insulating the coaxial liquid-cooled charging cable and improving its safety. The sheath layer 7 is wrapped around the outer periphery of the insulating layer 6 to ensure the overall wear resistance and compression resistance of the coaxial liquid-cooled charging cable, thereby ensuring the service life of the coaxial liquid-cooled charging cable.

[0038] In this embodiment, the cross-sectional area of the first conductor layer 2 is 72%-78% of the cross-sectional area of the second conductor layer 5 .

[0039] In this embodiment, one of the first and second conductor layers 2 and 5 flows a positive current, while the other flows a negative current. For example, the first conductor layer 2 flows a positive current, while the second conductor layer 5 flows a negative current; or the first conductor layer 2 flows a negative current, while the second conductor layer 5 flows a positive current, thereby enabling charging of a new energy vehicle.

[0040] In this embodiment, multiple support members 3 are provided, spaced apart between the outer periphery of the first conductor layer 2 and the inner wall of the second liquid-cooling tube 4. This provides multi-point support for the second liquid-cooling tube 4, enabling smooth flow of the second coolant to fully submerge the first conductor layer 2 and improving the overall roundness of the coaxial liquid-cooled charging cable. Support members 3 can be made of copper monofilament with a diameter of 2 mm to 3 mm.

[0041] In this embodiment, the first liquid cooling tube 1 can be made of a cross-linked polyolefin or polylaurolactam. A round tube with an inner diameter of 4 mm, an outer diameter of 6 mm, and a wall thickness of 1.0 mm can be used. The first coolant can be a mixture of ethylene glycol and water, silicone oil, or a fluorinated liquid, as long as the first coolant does not chemically react with the material of the first liquid cooling tube 1.

[0042] In this embodiment, the second liquid cooling tube 4 can be made of cross-linked polyolefin or polylaurolactam. The second cooling liquid can be silicone oil or fluorinated liquid with insulating properties.

[0043] In this embodiment, the insulation layer 6 is made of cross-linked polyolefin. This ensures that the insulation layer 6 is made of the same material as the first and second liquid cooling tubes 1 and 4, and its temperature resistance is consistent with that of the first and second liquid cooling tubes 1 and 4, further ensuring the safety of the coaxial liquid-cooled charging cable. The thickness of the insulation layer 6 is 1.4 mm to 1.8 mm.

[0044] In this embodiment, the jacket layer 7 can be made of polyamide or modified PVC. Modified PVC refers to the addition of additives to the PVC material to enhance certain properties of the PVC. Modified PVC is a conventional material in the cable manufacturing field and will not be elaborated on here. Specifically, PVC is polyvinyl chloride.

[0045] Exemplarily, the first conductor layer 2 is formed by a plurality of copper conductors spirally twisted on the outer periphery of the first liquid-cooling tube 1 to facilitate the processing of the coaxial liquid-cooled charging cable. If the pitch of the twisting between the plurality of copper conductors is too large, the first conductor layer 2 formed as a whole will be too loose, and the copper conductor strands may even slide relative to the first liquid-cooling tube 1, causing the connection terminals at both ends of the coaxial liquid-cooled charging cable to fall off, affecting the charging of the new energy vehicle. Preferably, in this embodiment, the pitch-to-diameter ratio of the twisting between the plurality of copper conductors is 11 times to 13 times, so as to ensure that the first conductor layer 2 formed after the plurality of copper conductors are twisted can be firmly wrapped around the outer periphery of the first liquid-cooling tube 1, and the overall compactness of the coaxial liquid-cooled charging cable is better, ensuring that the new energy vehicle can be quickly charged. The copper conductor is formed by twisting a plurality of copper wires, and the diameter of the copper wire is 0.12mm-0.15mm.

[0046] Preferably, the coaxial liquid-cooled charging cable also includes a first wrapping layer 8, wherein the first wrapping layer 8 is wrapped around the outer periphery of the first conductor layer 2 to further prevent the first conductor layer 2 from loosening, and further improve the safety of use and the overall roundness of the coaxial liquid-cooled charging cable. The support member 3 is in contact with the first wrapping layer 8. In this embodiment, the first wrapping layer 8 can be made of non-woven fabric, which is wrapped around the outer periphery of the first conductor layer 2 by spiral winding; or the first wrapping layer 8 can be made of a metal braided sleeve, which is sleeved on the outer periphery of the first conductor layer 2 to prevent the twisted multiple copper conductors from loosening, so that the first conductor layer 2 is tightly fitted to the outer periphery of the first liquid cooling tube 1. When the first wrapping layer 8 is a metal braided sleeve, the braiding density of the metal braided sleeve can be ≥60%.

[0047] In this embodiment, the coaxial liquid-cooled charging cable also includes a signal line 9, which is located between the insulating layer 6 and the sheath layer 7. Among them, the setting of the signal line 9 enables the coaxial liquid-cooled charging cable to communicate with multiple electronic components in the new energy vehicle, so that the owner can understand the charging status of the vehicle in real time. The communication connection between the signal line 9 and the electronic components is a conventional technical means in the field of new energy charging and will not be described in detail here. At the same time, the signal line 9 is set between the insulating layer 6 and the sheath layer 7. The signal line 9 can support the insulating layer 6 and the sheath layer 7, avoiding shaking of the insulating layer 6 and the components inside it, and further improving the overall compactness of the coaxial liquid-cooled charging cable. At the same time, since the signal line 9 is set at the edge area of the coaxial liquid-cooled charging cable, when the coaxial liquid-cooled charging cable is bent, the signal line 9 will not produce a large bending angle, so that the service life of the signal line 9 can be guaranteed.

[0048] Preferably, the coaxial liquid-cooled charging cable also includes a shielding layer 10, which is wrapped around the outer periphery of the insulating layer 6 and adheres to the signal line 9. The provision of the shielding layer 10 can prevent the high current flowing through the first conductor layer 2 and the second conductor layer 5 during the charging process of the new energy vehicle from causing electromagnetic interference to the signal line 9, thereby ensuring the stability of the signal transmission of the signal line 9 and further improving the charging experience of the vehicle owner. In this embodiment, the shielding layer 10 is a metal braided sleeve, wherein the braiding density of the metal braided sleeve is ≥80%. Alternatively, the shielding layer 10 can also be formed by a copper tape spirally wrapped around the outer periphery of the insulating layer 6.

[0049] Preferably, the coaxial liquid-cooled charging cable also includes a filling strip 11, wherein the filling strip 11 is twisted together with the signal line 9 and wrapped around the outer periphery of the shielding layer 10, so as to further improve the compactness of the coaxial liquid-cooled charging cable. Among them, the filling strip 11 can be made of aramid rope or bulletproof wire, and the aramid rope or bulletproof wire is twisted together with the signal line 9 to improve the overall tensile strength of the signal line 9. The filling strip 11 can also be made of a waterproof strip, which is twisted together with the signal line 9 to improve the longitudinal waterproof capability of the coaxial liquid-cooled charging cable. There is no specific restriction on the selection of the filling strip 11. In this embodiment, the pitch-diameter ratio of the twisted section between the signal line 9 and the filling strip 11 is 8 times to 10 times. The signal line 9 uses a 0.5 square or 0.75 square conductor to ensure the stability of signal transmission.

[0050] Preferably, the coaxial liquid-cooled charging cable also includes a second wrapping layer 12, wherein the second wrapping layer 12 is wrapped around the periphery of the signal line 9 and the filling strip 11. The provision of the second wrapping layer 12 can prevent the signal line 9 and the filling strip 11 from becoming loose, so that the signal line 9 and the filling strip 11 can fit tightly around the periphery of the shielding layer 10. This further ensures the compactness of the coaxial liquid-cooled charging cable and improves its ability to resist external extrusion. The second wrapping layer 12 can be formed by spirally winding a non-woven fabric around the periphery of the signal line 9 and the filling strip 11, or by a metal braided sleeve arranged around the periphery of the signal line 9 and the filling strip 11, and there is no specific limitation.

[0051] In this embodiment, the second conductor layer 5 is formed by spirally wrapping a copper tape around the outer circumference of the second liquid-cooling tube 4. This facilitates the processing of the second conductor layer 5 and reduces the difficulty of processing the coaxial liquid-cooled charging cable. Preferably, the copper tape has an elongation of 25% or greater. If the elongation is too low, the copper tape is prone to breakage during the spiral wrapping process, making it difficult to process the coaxial liquid-cooled charging cable. The copper tape has a thickness of 0.05mm-0.12mm. If the copper tape is too thick, it will reduce the flexibility of the coaxial liquid-cooled charging cable, affecting the user experience.

[0052] like Figure 2 As shown, this embodiment provides a method for preparing a coaxial liquid-cooled charging cable, which is used to prepare the coaxial liquid-cooled charging cable in Example 1, wherein the method for preparing the coaxial liquid-cooled charging cable includes the following steps:

[0053] Step 1: Fill the first liquid cooling tube 1 with the first coolant.

[0054] Step 2: Spirally twist a plurality of copper conductors on the outer periphery of the first liquid cooling tube 1 to form a first conductor layer 2 .

[0055] Step 3: A second liquid cooling tube 4 is sleeved on the outer periphery of the first conductor layer 2, and a support member 3 is placed between the outer periphery of the first conductor layer 2 and the inner wall of the second liquid cooling tube 4, and a second coolant is circulated in the second liquid cooling tube 4; wherein a plurality of support members 3 are provided, and the plurality of support members 3 are placed at intervals between the outer periphery of the first conductor layer 2 and the inner wall of the second liquid cooling tube 4.

[0056] Step 4: Spirally wrap a copper tape around the outer circumference of the second liquid cooling tube 4 to form a second conductor layer 5 .

[0057] Step 5: Use an extruder to extrude the insulating material onto the outer periphery of the second conductor layer 5 to form the insulating layer 6 .

[0058] Step 6: Use an extruder to extrude the sheath material onto the outer periphery of the insulating layer 6 to form the sheath layer 7 .

[0059] In this embodiment, the following steps are further included between step 2 and step 3:

[0060] Step 20 : Wrap non-woven fabric or cover the outer periphery of the first conductor layer 2 with a metal braided sleeve to form a first wrapping layer 8 .

[0061] In this embodiment, the following steps are further included between step 5 and step 6:

[0062] Step 50: Place a metal braided sleeve on the outer periphery of the insulating layer 6 to form a shielding layer 10; wherein the braiding density of the metal braided sleeve is ≥80%.

[0063] Step 51 : After twisting the signal line 9 and the filling strip 11 together, spirally wrap them around the outer periphery of the shielding layer 10 , and the twisted signal line 9 and the filling strip 11 abut between the outer wall of the shielding layer 10 and the inner wall of the sheath layer 7 .

[0064] Step 52 : spirally wrap non-woven fabric or cover the outer periphery of the twisted signal wire 9 and the filling strip 11 with a metal braided sleeve to form a second wrapping layer 12 .

[0065] Example 2

[0066] This embodiment provides a charging pile using the above-mentioned coaxial liquid-cooled charging cable. The charging pile has a liquid pump, and the first liquid-cooling tube 1 and the second liquid-cooling tube 4 are both connected to the liquid pump, so that the three can be connected to form a cooling circuit. One of the first liquid-cooling tube 1 and the second liquid-cooling tube 4 can be used as a liquid inlet pipe, and the other as a liquid outlet pipe, so that the flow direction of the first coolant is opposite to the flow direction of the second coolant, realizing the circulation of heat dissipation for the first conductor layer 2 and the second conductor layer 5, further improving the heat dissipation effect of the coaxial liquid-cooled charging cable. The use of a liquid pump to connect the first liquid-cooling tube 1, the second liquid-cooling tube 4 and the liquid pump is a conventional technical means in the field of liquid-cooled cables and will not be elaborated on here.

[0067] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A coaxial liquid-cooled charging cable, characterized in that: include: A first liquid cooling tube (1), wherein the first liquid cooling tube (1) is filled with a first cooling liquid; A first conductor layer (2) is provided covering the outer circumference of the first liquid cooling tube (1); A support member (3) and a second liquid cooling tube (4), wherein the second liquid cooling tube (4) is sleeved on the outer periphery of the first conductor layer (2), the support member (3) is in contact between the first conductor layer (2) and the inner wall of the second liquid cooling tube (4), and a second cooling liquid flows in the second liquid cooling tube (4), and the second cooling liquid has insulating properties; a second conductor layer (5), the second conductor layer (5) being coated on the outer periphery of the second liquid cooling tube (4); an insulating layer (6), the insulating layer (6) covering the outer periphery of the second conductor layer (5); A sheath layer (7), wherein the sheath layer (7) is sleeved on the outer periphery of the insulating layer (6).

2. The coaxial liquid-cooled charging cable according to claim 1, characterized in that: The first conductor layer (2) is formed by a plurality of copper conductors twisted spirally around the outer periphery of the first liquid cooling tube (1), and the pitch-to-diameter ratio of the twisted plurality of copper conductors is 11 to 13 times.

3. The coaxial liquid-cooled charging cable according to claim 1, characterized in that: The coaxial liquid-cooled charging cable further comprises a first wrapping layer (8), the first wrapping layer (8) being wrapped around the outer periphery of the first conductor layer (2), and the support member (3) being in contact with the first wrapping layer (8).

4. The coaxial liquid-cooled charging cable according to claim 3, characterized in that: The coaxial liquid-cooled charging cable further comprises a signal line (9), and the signal line (9) is located between the insulating layer (6) and the sheath layer (7).

5. The coaxial liquid-cooled charging cable according to claim 4, characterized in that: The coaxial liquid-cooled charging cable further includes a shielding layer (10), which is wrapped around the outer periphery of the insulating layer (6) and adheres to the signal line (9).

6. The coaxial liquid-cooled charging cable according to claim 5, characterized in that: The coaxial liquid-cooled charging cable further includes a filling strip (11), wherein the filling strip (11) is twisted together with the signal line (9) and spirally wound around the outer periphery of the shielding layer (10).

7. The coaxial liquid-cooled charging cable according to claim 6, characterized in that: The coaxial liquid-cooled charging cable further includes a second wrapping layer (12), which is wrapped around the outer periphery of the signal line (9) and the filling strip (11).

8. The coaxial liquid-cooled charging cable according to any one of claims 1 to 7, characterized in that: A plurality of the support members (3) are provided, and the plurality of the support members (3) are arranged at intervals between the outer periphery of the second conductor layer (5) and the inner wall of the second liquid cooling tube (4).

9. The coaxial liquid-cooled charging cable according to any one of claims 1 to 7, characterized in that: The second conductor layer (5) is formed by spirally winding a copper strip around the outer circumference of the second liquid cooling tube (4).

10. A charging pile, characterized in that: Including the coaxial liquid-cooled charging cable as described in any one of claims 1-9.

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