Liquid cooling overcharge cable

Abstract

The invention, which belongs to the technical field of the charging cable, discloses a liquid-cooling over-charging cable comprising a charging wire group, a liquid-cooling pipe group, a liquid inlet pipe and an outer protective sleeve. The charging wire group comprises two charging wires; the periphery of the charging wire is tightly coated with an insulating layer; the liquid cooling pipe group comprises two liquid cooling ring pipes which are in one-to-one correspondence with the charging wires; the two liquid cooling ring pipes are respectively sleeved on the peripheries of the insulating layers of the corresponding charging wires; the liquid cooling ring pipe comprises a liquid cooling inner pipe and a liquid cooling outer pipe which are coaxially arranged; a liquid cooling channel with a spiral flow guide structure is formed between the liquid cooling inner pipe and the liquid cooling outer pipe; the outer protective sleeve circumferentially wraps the two liquid cooling outer pipes, and a cavity is formed between the outer protective sleeve and the outer peripheral walls of the two liquid cooling outer pipes; the liquid inlet pipe is used for supplying cooling liquid to the two liquid cooling channels at the same time through the cavity. A thermal boundary layer can be broken, temperature stratification in the liquid cooling channel is effectively prevented, the heat dissipation effect is good, and then the charging efficiency under the large-current charging scene is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging cables, and in particular relates to a liquid-cooled supercharging cable. Background Art

[0002] With the increasing electrification of contemporary society, the demand for power transmission in various fields is becoming increasingly stringent, and various types of equipment are also moving towards high-current operation. Whether it is large-scale production equipment in the industrial field, 5G base stations and data center servers and communications equipment, or rechargeable batteries in the new energy vehicle field, they all have a large demand for high-power power transmission. They all require charging cables that can provide high-power, continuous and stable power supply, which places increasingly high demands on charging cables.

[0003] For example, in the field of new energy vehicles, as the range of electric vehicles continues to improve, the capacity of electric vehicle batteries is also increasing. However, users do not want to spend more time charging their electric vehicles. Therefore, they need to solve the problem of charging speed by increasing the charging power to achieve fast charging function. Conventional high-power charging methods are achieved by increasing the charging current, but this method has obvious disadvantages. When facing high-power charging scenarios, traditional charging cables will generate significant Joule heating during charging due to their own resistance, causing the charging cable temperature to rise sharply, which in turn leads to increased overall heat consumption of the charging gun and decreased insulation performance of the charging cable, resulting in reduced charging efficiency, extended charging time, and seriously affecting the user experience. In addition, when the temperature exceeds the tolerance range of the insulation material of the charging cable, it will not only accelerate insulation aging and shorten the cable life, but also pose a safety hazard of causing safety accidents such as short circuits and fires.

[0004] In recent years, the use of liquid cooling technology to dissipate heat from cables has become an improvement direction for high-power charging cables. In the prior art, a liquid-cooled cable is disclosed, in which a liquid-cooling pipe is coated on the outside of the cable. Although an insulating layer is provided on the outside of the cable to isolate the cable from the coolant, this structure increases the heat transfer resistance, resulting in limited heat dissipation effect of the liquid-cooled cable. When the coolant flows in the liquid-cooling channel, due to the viscous interaction between the fluid and the wall of the liquid-cooling channel, a velocity boundary layer is formed near the wall, resulting in a higher flow velocity near the center of the channel and a lower flow velocity near the wall. This causes uneven heat transfer during the flow of the coolant, resulting in temperature stratification. Temperature stratification will lead to different cooling effects in different parts of the cable, resulting in inconsistent temperatures in different parts of the cable, and even leading to local heat accumulation. Due to the temperature difference between the coolant and the wall of the liquid-cooling channel, a thermal boundary layer is also formed at the same time. The thermal conductivity resistance in the thermal boundary layer is large, which further hinders the heat dissipation of the cable to the coolant. These defects not only affect the heat dissipation effect of the cable, reduce the current carrying capacity of the cable, thereby affecting the charging speed, but also may accelerate the aging of the cable insulation with long-term use, increasing safety risks. Therefore, there is an urgent need to provide a liquid-cooled supercharging cable that can solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a liquid-cooled supercharging cable to address the above-mentioned shortcomings. This cable is intended to solve the problems of poor heat dissipation in high-current charging scenarios, which affects charging efficiency, and uneven heat transfer during cooling, which leads to temperature stratification and the formation of a thermal boundary layer. To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A liquid-cooled supercharging cable, comprising a charging wire group, a liquid-cooling tube group, a liquid inlet pipe and an outer protective sleeve, wherein the charging wire group comprises two charging wires; the outer circumference of the charging wire is tightly covered with an insulating layer; the liquid-cooling tube group comprises two liquid-cooling ring tubes corresponding one to the charging wires; the two liquid-cooling ring tubes are respectively sleeved on the outer circumference of the insulating layer of the corresponding charging wires; the liquid-cooling ring tubes comprise a coaxially arranged liquid-cooling inner tube and a liquid-cooling outer tube; a liquid-cooling channel with a spiral guide structure is formed between the liquid-cooling inner tube and the liquid-cooling outer tube; the outer protective sleeve is circumferentially wrapped around the two liquid-cooling outer tubes, and forms a cavity between the outer circumferential walls of the two liquid-cooling outer tubes; the liquid inlet pipe is used to supply coolant to the two liquid-cooling channels at the same time through the cavity.

[0006] Furthermore, a spiral guide rib protruding radially outward is provided on the outer circumferential wall of the liquid-cooled inner tube, and a spiral groove body recessed radially outward is provided on the inner circumferential wall of the liquid-cooled outer tube; the spiral line of the spiral guide rib and the spiral line of the spiral groove body have a phase difference of 0°-180°.

[0007] Furthermore, the spiral directions of the spiral guide ribs in the two liquid-cooling ring pipes are in the same direction or in opposite directions; the spiral directions of the spiral grooves in the two liquid-cooling ring pipes are in the same direction or in opposite directions.

[0008] Furthermore, in the liquid cooling ring pipe, the spiral guide ribs are of an equidistant spiral structure or a variable pitch spiral structure; in the liquid cooling ring pipe, the spiral trough body is of an equidistant spiral structure or a variable pitch spiral structure.

[0009] Furthermore, the spiral guide rib includes at least one spiral rib protruding radially outward.

[0010] Furthermore, the spiral groove body includes at least one spiral groove recessed in a radial direction away from the charging wire.

[0011] Furthermore, a flow guide is provided in each liquid cooling channel; the flow guide is provided between the outer peripheral wall of the liquid cooling inner tube and the inner peripheral wall of the liquid cooling outer tube, and is used to disturb the flow of the cooling liquid passing through the liquid cooling channel.

[0012] Furthermore, the guide member is a spiral guide member; the spiral rotation directions of the spiral guide members in the two liquid cooling channels are in the same direction or in opposite directions.

[0013] Furthermore, the spiral flow guide is an equidistant spiral structure or a variable pitch spiral structure.

[0014] Furthermore, the two charging wires are arranged axially symmetrically in the outer protective sleeve; the liquid inlet pipe is arranged in the cavity and communicates with the interior of the two liquid cooling channels through the cavity; the liquid inlet pipe is located above the two charging wires, and the straight-line distance from the axis of the liquid inlet pipe to the axis of any charging wire is consistent.

[0015] The beneficial effects of the present invention are: 1. This invention improves the internal structure of the liquid cooling channel, increasing the contact area between the coolant and the charging conductor. This allows the coolant to be fully mixed and increases disturbance in the liquid cooling channel, preventing temperature stratification and breaking the thermal boundary layer, ensuring heat dissipation for the charging conductor, and thus ensuring charging efficiency and stability in high-current charging scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall cross-sectional view of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the liquid cooling ring tube and charging wire of the present invention; Figure 3 is a cross-sectional view of the liquid cooling loop and charging wire of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the liquid cooling ring tube, charging wire and flow guide member of the present invention; In the accompanying drawings: 1. Charging wire; 2. Liquid-cooling ring tube; 3. Liquid inlet pipe; 4. Outer protective sleeve; 5. Liquid-cooling channel; 6. Cavity; 7. Guide piece; 8. Auxiliary wire; 11. Insulation layer; 21. Liquid-cooling inner tube; 22. Liquid-cooling outer tube; 211. Spiral guide rib; 221. Spiral trough body. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0018] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0019] In the description of the present invention, "plurality" means two or more.

[0020] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0021] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0022] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," and "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0024] Example 1: See attached Figures 1-3 A liquid-cooled supercharging cable comprises a charging wire group, a liquid-cooling tube group, a liquid inlet pipe 3 and an outer protective sleeve 4, wherein the charging wire group comprises two charging wires 1; the outer periphery of the charging wire 1 is tightly covered with an insulating layer 11; the liquid-cooling tube group comprises two liquid-cooling ring pipes 2 corresponding to the charging wires 1; the two liquid-cooling ring pipes 2 are respectively sleeved on the outer periphery of the insulating layer 11 of the corresponding charging wires 1; the liquid-cooling ring pipe 2 comprises a coaxially arranged liquid-cooling inner pipe 21 and a liquid-cooling outer pipe 22; a liquid-cooling channel 5 having a spiral guide structure is formed between the liquid-cooling inner pipe 21 and the liquid-cooling outer pipe 22; the outer protective sleeve 4 is circumferentially wrapped around the two liquid-cooling outer pipes 22, and a cavity 6 is formed between the outer peripheral wall of the two liquid-cooling outer pipes 22; the liquid inlet pipe 3 is used to supply coolant to the two liquid-cooling channels 5 at the same time through the cavity 6. As can be seen from the above structure, the two charging wires 1 are the positive and negative charging wires, respectively, used to connect to the positive and negative poles of an external power source. The outer periphery of the charging wires 1 is tightly coated with an insulating layer 11, which provides insulation and protection for the charging wires 1. The liquid cooling tube assembly includes two liquid cooling loops 2, one corresponding to each charging wire 1. The liquid cooling loops 2 are mounted around the outer periphery of the insulating layer 11 of the corresponding charging wire 1 to dissipate heat for the corresponding charging wire 1. The liquid cooling loops 2 include an inner liquid cooling tube 21 and an outer liquid cooling tube 22. The outer liquid cooling tube 22 is mounted around the outer periphery of the inner liquid cooling tube 21, and a liquid cooling channel 5 is formed between the outer circumferential wall of the inner liquid cooling tube 21 and the inner circumferential wall of the outer liquid cooling tube 22 to allow the coolant to pass through. The liquid cooling channel 5 has a spiral guide structure inside. This allows the coolant to transfer heat more quickly and evenly as it flows through the channel. This improves heat dissipation efficiency while preventing temperature stratification and breaking the thermal boundary layer, ensuring the charging efficiency and stability of the charging conductors 1. The outer protective sleeve 4 circumferentially wraps around the two liquid cooling outer tubes 22, forming a cavity 6 between the outer walls of the two liquid cooling outer tubes 22. The liquid inlet pipe 3 is also located within this cavity 6. The outer protective sleeve 4 is used to accommodate and protect the wire assembly, the liquid cooling tube assembly, and the liquid inlet pipe 3. The liquid inlet pipe 3 supplies coolant to the two liquid cooling channels 5 through the cavity 6. After being cooled by the external cooling device, the coolant first flows through the liquid inlet pipe 3 into the cavity 6, then enters the two liquid cooling channels 5, dissipating heat from the two charging conductors 1, and then flows back to the cooling device, thus circulating the coolant. The present invention improves the internal structure of the liquid cooling channel 5 to ensure good coolant flow uniformity, prevent temperature stratification and break the thermal boundary layer, thereby ensuring the heat dissipation effect of the charging wire 1 under high current charging scenarios, thereby ensuring charging efficiency and charging stability.

[0025] Preferably, the cavity 6 within the outer protective sleeve 4 further accommodates several auxiliary wires 8. These include ground wires, signal wires, and other wires required for the charging cable. The types and structural arrangements of these wires are known in the art and are therefore not further described herein. Each auxiliary wire 8 is also tightly coated with a second insulating layer on its outer circumference, which provides insulation and protection for the auxiliary wires 8.

[0026] Example 2: See attached Figures 1-3. Based on the first embodiment, a spiral guide rib 211 protruding radially outward is wound around the outer circumferential wall of the liquid-cooled inner tube 21, and a spiral groove body 221 recessed radially outward is provided on the inner circumferential wall of the liquid-cooled outer tube 22; the spiral line of the spiral guide rib 211 and the spiral line of the spiral groove body 221 have a phase difference of 0°-180°. From the above structure, it can be seen that a spiral guide rib 211 protruding and spirally extending in a radial direction away from the charging wire 1 is wound around the outer circumferential wall of the liquid-cooled inner tube 21, and a spiral groove body 221 recessed and spirally extending in a radial direction away from the charging wire 1 is provided on the inner circumferential wall of the liquid-cooled outer tube 22. The cooperation between the spiral guide rib 211 and the spiral groove body 221 forms a liquid-cooled channel 5 with a spiral guide structure between the liquid-cooled inner tube 21 and the liquid-cooled outer tube 22, which can guide the coolant to flow spirally in the liquid-cooled channel 5. Compared to traditional linear flow channels, this spiral flow pattern can break up the thermal boundary layer, reduce thermal resistance, and enable more efficient heat exchange between the coolant and the cable conductor. Preferably, those skilled in the art can also adjust the arrangement of the spiral structures on the liquid-cooling inner tube 21 and the liquid-cooling outer tube 22 based on the above-mentioned features, such as providing a spiral groove 221 on the outer circumferential wall of the liquid-cooling inner tube 21 that is recessed and spirally extends in a radial direction close to the charging conductor 1, while providing a spiral guide rib 211 on the inner circumferential wall of the liquid-cooling outer tube 22 that is raised and spirally extends in a radial direction close to the charging conductor 1. The present invention continuously disturbs and mixes the coolant passing through the liquid-cooling ring tube 2 through the coordination of the spiral structure of the spiral guide ribs 211 and the spiral trough 221 in the liquid-cooling ring tube 2, allowing the coolant to move in the circumferential and axial directions of the liquid-cooling ring tube 2 and be fully mixed, so that the heat of the fluid in the area near the outer peripheral wall of the liquid-cooling inner tube 21 and the area near the inner peripheral wall of the liquid-cooling outer tube 22 can be fully exchanged, thereby reducing thermal resistance, uniformizing the temperature of the fluid throughout the liquid-cooling channel 5, preventing temperature stratification from affecting the heat dissipation performance of the liquid-cooling ring tube 2, and ensuring the heat dissipation performance. In addition, in each liquid-cooling ring tube 2, the spiral line of the spiral guide ribs 211 and the spiral line of the spiral trough 221 have a phase difference of 0°-180°. According to actual heat dissipation requirements, the spiral guide ribs 211 and the spiral groove body 221 can have a geometric phase deviation of 0°-180°, so that the two form a parallel or staggered structure, so that the coolant forms an orderly fluctuation during the flow process, thereby breaking the thermal boundary layer, reducing the friction between the fluid and the channel wall, and thus reducing the flow resistance.

[0027] The turbulence effect of the liquid cooling channel 5 is enhanced to ensure the heat exchange effect of the coolant flowing through it, making the fluid temperature more uniform and avoiding local overheating that affects the performance and life of the cable. The phase difference is between 0° and 180°. Specifically, the phase difference between the spiral guide rib 211 and the spiral groove body 221 can be preferably 0°, 15°, 30°, 45°, 60°, 75°, etc.

[0028] The spiral ribs 211 in the two liquid-cooling loops 2 can have the same or opposite spiral rotations; the spiral grooves 221 in the two liquid-cooling loops 2 can have the same or opposite spiral rotations. As can be seen from the above structure, by designing the spiral ribs 211 and spiral grooves 221 in the two liquid-cooling loops 2 to have the same or different spiral rotations, a more uniform coolant flow can be achieved through different spiral rotation configurations, improving fluid uniformity and preventing temperature stratification from affecting heat dissipation, thereby reducing the charging efficiency of the charging conductor 1 in high-current charging scenarios.

[0029] In the liquid cooling ring pipe 2, the spiral guide rib 211 is an equidistant spiral structure or a variable pitch spiral structure; in the liquid cooling ring pipe 2, the spiral groove body 221 is an equidistant spiral structure or a variable pitch spiral structure. As can be seen from the above structure, the spiral lines of the spiral guide rib 211 and the spiral groove body 221 can both be equidistant spiral structures, both be variable pitch spiral structures, or one can be an equidistant spiral structure and the other can be a variable pitch spiral structure. Figure 3 As shown, the structures of the spiral guide ribs 211 and the spiral trough body 221 are both equidistant spiral structures. This setting can further change the flow of the coolant in the liquid cooling channel 5 and increase the uniformity of the flow. Among them, in the variable pitch spiral structure, the density of the spiral structure specifically includes sparse and dense, sparse at the front and dense at the back, and dense at the front and sparse at the back. Sparse and dense is a periodic pitch change, sparse at the front and dense at the back means that the pitch decreases along the flow direction of the coolant, and dense at the front and sparse at the back means that the pitch increases along the flow direction of the coolant. For example, in the part where the heat of the charging wire 1 is concentrated, a denser pitch is adopted to increase the flow rate and flow velocity of the coolant and improve the heat dissipation efficiency; while in the part where the heat of the charging wire 1 is relatively less, a sparser pitch is adopted to reduce the resistance of the coolant and reduce energy consumption. The pitch of the spiral structure of the spiral guide rib 211 and the pitch of the spiral structure of the spiral trough body 221 are adaptively set according to the actual charging heat dissipation requirements.

[0030] The spiral guide rib 211 includes at least one spiral rib protruding radially outward. As can be seen from the above structure, the spiral guide rib 211 includes at least one spiral rib protruding outward in a radial direction away from the charging wire 1 and extending spirally. The number of spiral ribs can be set to one, two, or three or more according to actual needs, and the spiral ribs can be arranged in a parallel or staggered structure.

[0031] The spiral groove body 221 includes at least one spiral groove that is recessed in a radial direction away from the charging wire 1. As can be seen from the above structure, the spiral groove body 221 includes at least one spiral groove that is recessed in a radial direction away from the charging wire 1 and extends helically. The number of spiral grooves can be one, two, or three or more according to actual needs, and the spiral grooves can be arranged in a parallel or staggered structure.

[0032] Example 3: See attached Figures 1 to 4 On the basis of the second embodiment, a flow guide 7 is further provided in each liquid cooling channel 5; the flow guide 7 is provided between the outer peripheral wall of the liquid cooling inner tube 21 and the inner peripheral wall of the liquid cooling outer tube 22, and is used to disturb the flow of the coolant passing through the liquid cooling channel 5. As can be seen from the above structure, Figure 4 As shown, to improve the uniformity of coolant flow within the liquid-cooling channel 5, a flow guide 7 is added to the liquid-cooling channel 5 to turbulently control the coolant flow. The flow guide 7 is installed using conventional methods, such as welding, clamping, or other common mechanical connection and fixing methods, and is fixedly connected to either side of the outer circumferential wall of the liquid-cooling inner tube 21 or the inner circumferential wall of the liquid-cooling outer tube 22.

[0033] The guide member 7 is a spiral guide member; the spiral rotation direction of the spiral guide members in the two liquid cooling channels 5 is the same direction or opposite direction. As can be seen from the above structure, the guide member 7 is a spiral guide member, and spirally extends along the length direction of the liquid cooling channel 5. The spiral rotation direction of the spiral guide members in the two liquid cooling channels 5 is the same direction or opposite direction. The actual rotation direction can be adaptively matched according to the design of the spiral guide rib 211 and the spiral groove body 221 in the liquid cooling channel 5. The spiral guide member can be specifically designed as follows Figure 4 The spiral guide strip shown can also be made of spiral guide fins or other existing guide parts according to actual installation requirements.

[0034] The spiral guide member can be configured as an equidistant spiral structure or a variable pitch spiral structure. As can be seen from the above structure, the spiral guide member can be configured as an equidistant spiral structure or a variable pitch spiral structure based on the design of the spiral guide ribs 211 and the spiral grooves 221 within the liquid cooling channel 5. The pitch can be adaptively adjusted based on actual conditions to ensure the cooling liquid is effectively guided.

[0035] The two charging conductors 1 are arranged axially symmetrically within the outer protective sleeve 4; the liquid inlet pipe 3 is arranged within the cavity 6 and communicates with the interior of the two liquid cooling channels 5 through the cavity 6; the liquid inlet pipe 3 is located above the two charging conductors 1, and the straight-line distance from the axis of the liquid inlet pipe 3 to the axis of any charging conductor 1 is consistent. As can be seen from the above structure, the liquid inlet pipe 3 is arranged within the cavity 6 and communicates with the interior of the two liquid cooling channels 5 through the cavity 6 to realize the function of transporting coolant. The position design of the liquid inlet pipe 3 ensures that the distance the coolant passes through the cavity 6 into the two liquid cooling channels 5 is consistent, so that the coolant can flow evenly into the two liquid cooling channels 5 after entering the cavity 6.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid-cooled supercharging cable, comprising a charging wire assembly, a liquid cooling tube assembly, a liquid inlet tube (3) and an outer protective casing (4), characterized in that: The charging wire group includes two charging wires (1); the outer periphery of the charging wires (1) is tightly covered with an insulating layer (11); the liquid cooling tube group includes two liquid cooling ring tubes (2) corresponding to the charging wires (1); the two liquid cooling ring tubes (2) are respectively sleeved on the outer periphery of the insulating layer (11) of the corresponding charging wires (1); the liquid cooling ring tube (2) includes a coaxially arranged liquid cooling inner tube (21) and a liquid cooling outer tube (22); a liquid cooling channel (5) with a spiral guide structure is formed between the liquid cooling inner tube (21) and the liquid cooling outer tube (22); the outer protective sleeve (4) is circumferentially wrapped around the two liquid cooling outer tubes (22) and forms a cavity (6) between the outer peripheral walls of the two liquid cooling outer tubes (22); the liquid inlet pipe (3) is used to supply cooling liquid to the two liquid cooling channels (5) at the same time through the cavity (6).

2. The liquid-cooled supercharging cable according to claim 1, characterized in that: A radially outwardly protruding spiral guide rib (211) is wound around the outer circumferential wall of the liquid-cooling inner tube (21), and a radially outwardly recessed spiral groove body (221) is provided on the inner circumferential wall of the liquid-cooling outer tube (22); a phase difference of 0°-180° exists between the spiral line of the spiral guide rib (211) and the spiral line of the spiral groove body (221).

3. The liquid-cooled supercharging cable according to claim 2, characterized in that: The spiral directions of the spiral guide ribs (211) in the two liquid cooling ring tubes (2) are in the same direction or in opposite directions; the spiral directions of the spiral groove bodies (221) in the two liquid cooling ring tubes (2) are in the same direction or in opposite directions.

4. The liquid-cooled supercharging cable according to claim 3, characterized in that: In the liquid cooling ring tube (2), the spiral guide ribs (211) are of an equidistant spiral structure or a variable pitch spiral structure; and in the liquid cooling ring tube (2), the spiral groove body (221) is of an equidistant spiral structure or a variable pitch spiral structure.

5. The liquid-cooled supercharge cable according to any one of claims 1 to 4, characterized in that: The spiral guide rib (211) comprises at least one spiral rib protruding radially outward.

6. The liquid-cooled supercharge cable according to any one of claims 1 to 4, characterized in that: The spiral groove body (221) comprises at least one spiral groove recessed in a radial direction away from the charging wire (1).

7. The liquid-cooled supercharge cable according to any one of claims 1 to 4, characterized in that: A flow guide (7) is also provided in each liquid cooling channel (5); the flow guide (7) is provided between the outer peripheral wall of the liquid cooling inner tube (21) and the inner peripheral wall of the liquid cooling outer tube (22), and is used to disturb the cooling liquid passing through the liquid cooling channel (5).

8. The liquid-cooled supercharged cable according to claim 7, characterized in that: The flow guide (7) is a spiral flow guide; the spiral directions of the spiral flow guides in the two liquid cooling channels (5) are in the same direction or in opposite directions.

9. The liquid-cooled supercharged cable according to claim 8, characterized in that: The spiral flow guide is an equidistant spiral structure or a variable pitch spiral structure.

10. The liquid-cooled supercharging cable according to claim 1, characterized in that: The two charging wires (1) are arranged axially symmetrically within the outer protective sleeve (4); the liquid inlet pipe (3) is arranged within the cavity (6) and communicates with the interior of the two liquid cooling channels (5) through the cavity (6); the liquid inlet pipe (3) is located above the two charging wires (1), and the straight-line distance from the axis of the liquid inlet pipe (3) to the axis of any one of the charging wires (1) is consistent.

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