CN115938671A - Liquid cooling cable for electric automobile quick charging - Google Patents

Abstract

The invention discloses a liquid cooling cable for electric automobile quick charging, and belongs to the technical field of electric automobile charging. The invention comprises an insulating outer cover, an insulating separation layer, a return pipe, a lead, an insulating sleeve and refrigerating fluid. The insulating outer layer is of a cylindrical cavity structure with equal wall thickness and extends along the axial direction. The insulating separate layer is located in the cavity structure of the insulating outer cover, the inner space of the insulating outer cover is divided into a cavity and a liquid cavity, the spaces of the two cavities are not communicated, the liquid cavity is used as a liquid inlet channel, and the insulating separate layer axially extends along with the insulating outer cover. The return pipe supplies cooling fluid to flow back to the refrigeration plant in the charging pile, and the return pipe axially extends along with the insulating outer cover. The wire includes DC + and DC-power supply circuit, low-voltage auxiliary power supply circuit, ground wire and communication line, and the wire is extended axially along with the insulation. The insulating sleeve wraps the outside of part of the leads, wherein the surfaces of the insulating sleeves of the DC + and the DC-two power lines are provided with protruding structures which are distributed in a circumferential direction and an axial direction at equal intervals.

Description

Liquid cooling cable for electric automobile quick charging

Technical Field

The invention belongs to the technical field of electric automobile charging, and relates to a liquid cooling cable for electric automobile quick charging.

Background

The charging infrastructure is an important guarantee for high-quality development of the new energy automobile industry. With the continuous improvement of the requirement of users on the charging rate of electric vehicles, high-power rapid charging has become the main direction of the development of electric vehicle charging facilities. However, high-power charging can cause the heat generation of the cable to increase, and potential safety hazards are easy to generate. Therefore, it is necessary to apply efficient cable cooling technology in the charging pile.

Liquid cooling heat dissipation is a cable cooling technical scheme with great development prospect. The existing liquid cooling heat dissipation adopts a liquid cooling scheme of incoming current at one side and backflow at one side aiming at two power supply lines of DC + and DC-mostly, and the condition that the cable is cooled unevenly can be caused. In addition, the liquid cooling passageway of current liquid cooling cable is smooth cylindric and constantly extends along the axial, and this can lead to the laminar flow boundary layer full development of wall department, and then reduces the heat convection coefficient, worsens the liquid cooling effect of cable. Therefore, a more complete liquid cooling scheme is needed to solve the heat dissipation problem of the cable during high-power charging of the electric vehicle.

Disclosure of Invention

In order to solve the problems mentioned in the background art, the invention mainly aims to provide a liquid cooling cable for rapidly charging an electric vehicle, which can effectively enhance the cooling effect on a charging cable, control the temperature rise of a high-power charging cable within an acceptable range and guarantee the charging safety of the electric vehicle.

The purpose of the invention is realized by the following technical scheme.

The invention discloses a liquid cooling cable for rapidly charging an electric automobile. The insulating outer layer is of a cylindrical cavity structure with equal wall thickness and extends along the axial direction. The insulating separate layer is located in the cavity structure of the insulating outer cover, the inner space of the insulating outer cover is divided into a cavity and a liquid cavity, the spaces of the two cavities are not communicated, the liquid cavity is used as a liquid inlet channel, and the insulating separate layer axially extends along with the insulating outer cover. The back flow is for supplying the refrigeration plant of coolant liquid backward flow to charging pile in, and the back flow is extended along with insulating outer quilt axial. The wire includes DC + and DC-power supply circuit, low pressure auxiliary power supply circuit, ground wire and communication line, and the wire is followed the insulating outer quilt axial extension. The insulation sleeve wraps the outside of part of the wires, wherein the surfaces of the insulation sleeves of the DC + and DC-two power lines are provided with protruding structures which are distributed circumferentially and axially at equal intervals.

Preferably, the insulating and separating layer is used to divide the space inside the insulating outer envelope into two portions that do not interfere with each other, so as to facilitate the arrangement of the wires and the layout of the refrigeration circuit. The cavity is a cavity inside the insulating separation layer; the liquid chamber is the cavity outside the insulating separation layer and inside the insulating outer cover. The cavity contains the communication lines that do not require cooling, an insulating sleeve outside the communication lines, and a ground wire. The liquid cavity comprises a DC +/DC-power supply circuit needing cooling, a low-voltage auxiliary power supply circuit, an insulating sleeve outside the lead and a return pipe.

Preferably, the cross-sectional shape of the insulating separation layer is a hollow arch, and the inner corners of the arch are rounded or beveled to eliminate stress concentration of the material and ensure mechanical strength. The insulating separation layer extends along the axial direction of the cable, and the inner cavity of the insulating separation layer is divided into a cavity or a liquid cavity; the placing mode of the insulating separation layer comprises two modes: in the first mode, the cambered surface of the insulating separation layer is bonded on the inner wall of the insulating outer cover; in the second mode, the insulating separation layer and the insulating outer cover are integrally formed.

Preferably, the low-voltage auxiliary power supply line, the DC +/DC-power supply line and the communication line are wrapped by insulating sleeves; the ground wire may comprise a number of ground sub-wires in the inner cavity of the isolating separator.

Preferably, the means for effecting the flow of the refrigerant fluid: the refrigerant liquid flows from the charging infrastructure end to the charging pile end through the liquid cavity and then flows to the charging infrastructure end through the backflow cavity in the backflow pipe.

Preferably, the outer side of an insulating sleeve of the DC +/DC-power circuit is provided with a convex structure, so that the disturbance of the refrigerating fluid is intensified, the heat convection area is increased, and the refrigerating effect is enhanced.

Preferably, the convex structure can be in a block shape or a spherical shape; the geometric characteristics of the convex block on the cross section of the cable are fan-shaped, and can also be rectangular or trapezoidal; the geometric characteristics of the convex block on the section of the cable shaft are rectangular or trapezoidal; the distance between the adjacent protruding structures in the circumferential direction can be narrower than the protruding structures, as wide as the protruding structures or wider than the protruding structures; the spacing between axially adjacent raised structures may be shorter than, as long as, or longer than the raised structures.

Preferably, the wire is formed by twisting a plurality of strands of twisted copper wire meshes; the return pipe is a polytetrafluoroethylene pipe; the refrigerating fluid can be silicone oil or glycol, and can also be water.

Has the advantages that:

1. according to the liquid cooling cable for rapidly charging the electric automobile, the insulating separation layer is arranged, so that the wires which do not need to be cooled are separated, the refrigerating fluid directly flows through the liquid cavity, and the DC + and DC-power supply circuit is directly cooled, so that the problem of uneven heat exchange is solved. In addition, the return pipe arranged in the middle of the power supply circuit can carry out secondary cooling on the power supply circuit, and the cooling effect on the charging cable is further enhanced.

2. According to the liquid cooling cable for rapidly charging the electric automobile, disclosed by the invention, the protruding structure on the outer surface of the insulating sleeve not only enables the refrigerant liquid to generate disturbance during flowing so as to intensify heat exchange, but also can enlarge the heat exchange area between the refrigerant liquid and a heat source. On the premise of not increasing the diameter of the existing charging cable, the cooling effect is enhanced. The invention also can further increase the convection heat exchange area and enhance the cooling effect by optimally selecting the shape layout of the convex structure.

3. According to the liquid cooling cable for rapidly charging the electric automobile, disclosed by the invention, the refrigerating fluid flows from the charging infrastructure end to the charging pile end through the liquid cavity and then flows to the charging infrastructure end through the reflux cavity in the reflux pipe, so that the cavity flow refrigerating efficiency is improved, and the refrigerating effect is enhanced.

4. According to the liquid cooling cable for the quick charging of the electric automobile, disclosed by the invention, the cross section of the insulating separation layer is in a hollow arch shape, and the inner angle of the arch shape is subjected to fillet or bevel treatment so as to eliminate the stress concentration of materials and ensure the mechanical strength.

5. On the basis of realizing the beneficial effects 1, 2, 3 and 4, the liquid cooling cable for rapidly charging the electric automobile disclosed by the invention effectively enhances the cooling effect on the charging cable, controls the temperature rise of the high-power charging cable within an acceptable range, and ensures the charging safety of the electric automobile.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a liquid-cooling cable according to embodiment 1 of the present invention;

fig. 2 is a cross-sectional view of a liquid-cooled cable provided in embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of an insulation sleeve with a bump according to embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of a liquid cooling cable according to embodiment 2 of the present invention;

FIG. 5 is a cross-sectional view of a liquid cooled cable according to embodiment 2 of the present invention;

fig. 6 is a schematic structural diagram of an insulation sleeve with a convex ball according to embodiment 2 of the present invention.

Wherein: 10-insulating outer cover, 20-insulating separation layer, 30-reflux pipe, 40-lead, 41-insulating sleeve, 50-refrigerating fluid, 51-cavity, 52-fluid cavity, 53-reflux cavity, 401-low-voltage auxiliary power circuit, 402-DC +/DC-power circuit, 403-communication circuit and 404-ground wire.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Example 1:

with the continuous development of the high-power charging technology of the electric vehicle, it has become one of the keys for developing the quick charging technology of the electric vehicle to adopt a proper cooling method to reduce the temperature of the charging cable during charging.

As shown in fig. 1 and fig. 2, the liquid cooling cable for liquid cooling charging pile of electric vehicle disclosed in this embodiment includes an insulating outer cover 10, an insulating separation layer 20, a return pipe 30, a conducting wire 40 with various functions, and an insulating sleeve 41. The lead 40 includes a low-voltage auxiliary power supply line 401, a DC +/DC-power supply line 402, a communication line 403, and a ground line 404. The low-voltage auxiliary power supply line 401 and the DC +/DC-power supply line 402 are externally wrapped by insulating sleeves 41, the outer surface of the insulating sleeve 41 outside the DC +/DC-power supply line 402 has circumferentially and axially equidistantly distributed bumps, while the outer surface of the insulating sleeve 41 outside the low-voltage auxiliary power supply line 401 does not have said geometrical features.

Specifically, the insulating outer cover 10 is located at the outermost layer of the entire cable, and functions to insulate and protect the charging cable. The insulation jacket 10 has a cavity which completely protects the insulation spacer 20, the return tube 30, the lead wire 40 and the insulation sleeve 41 outside the lead wire. The insulating outer cover 10 is made of an insulating material, which may be PVC, TPE, TPU, rubber, or the like. In addition to the insulating effect, the insulating jacket 10 also plays a crucial role in the protection of the refrigerant fluid 50 against leakage. The insulating outer cover 10 has a certain thickness to ensure the mechanical strength thereof and avoid electric leakage and leakage accidents caused by fatigue damage of the insulating outer cover 10. The cross-sectional shape of the insulating outer cover 10 is generally circular, which can improve the utilization rate of the inner space on one hand, and can effectively eliminate the stress concentration of the insulating outer cover on the other hand, thereby further ensuring the mechanical strength.

The isolating and separating layer 20 is located inside the insulating outer cover 10 and serves to divide the space inside the insulating outer cover 10 into two portions which do not interfere with each other, so as to facilitate the rational arrangement of the conducting wires 40 and the rational design of the refrigerating circuit. The cavity 51 is a cavity within the isolating separator 20; the fluid chamber 52 is a cavity outside the isolating separator layer 20 and inside the insulating outer cover 10. The cavity 51 contains a communication line 403 that does not require cooling, an insulating sleeve 41 outside the communication line, and a ground line 404. The liquid chamber 52 contains a DC +/DC-power line 402, a low-voltage auxiliary power line 401, an insulating sleeve 41 outside the above-mentioned wires, and a return pipe 30 which need to be cooled. The cross-sectional shape of the isolating separator 20 is a hollow arch, and the inner corners of the arch are rounded or beveled to eliminate stress concentration of the material and ensure mechanical strength. The insulating spacer layer 20 is made of the same material as the insulating outer cover 10, and may be made of PVC, TPE, TPU, rubber, etc. The insulating separation layer 20 can be integrally formed with the insulating outer cover 10, and the cambered surface of the insulating outer cover 10 can also be bonded into a whole with the cambered surface of the insulating outer cover after the insulating separation layer 20 and the insulating outer cover 10 are independently formed, so that the refrigerating liquid 50 is prevented from flowing between the cambered surfaces of the insulating separation layer 20 and the insulating outer cover 10, and the refrigerating efficiency is reduced.

The fluid chamber 52 of the isolating separator 20 is in communication with the return chamber 53 in the return conduit 30 at the gun end and not in communication with the cavity 51. The refrigerant liquid 50 flows into the charging pile end through the liquid cavity 52 and flows through the whole cable, and a primary refrigeration process is completed; then, the refrigerant liquid 50 flows back to the charging pile end through the return cavity 53 in the return pipe 30 at the charging gun end, and the secondary refrigeration process is completed. Since the insulation protection structure of the insulation outer cover 10, the insulation separation layer 20 and the insulation sleeve 41 is adopted, the refrigerant liquid 50 in embodiment 1 does not directly contact with the lead 40, and therefore the refrigerant liquid 50 may be silicon oil or ethylene glycol, or may be water. The return pipe 30 is made of a polytetrafluoroethylene pipe, and the polytetrafluoroethylene pipe has high temperature resistance and good chemical stability in a high-temperature working environment.

The wires 40 placed in the liquid chamber 52 need to be cooled by liquid cooling, in particular the DC +/DC-power supply line 402. The DC +/DC-power supply circuit 402 is used for circulating direct current to realize the charging process of the electric automobile. Wherein DC + refers to a direct current positive power supply line for connecting the positive pole of the battery; and the DC-refers to a direct current cathode power supply line which is used for connecting the cathode of the battery. In cables for fast charging of electric vehicles, the DC +/DC-power line 402 is characterized by a large current flowing through it, which leads to two consequences: first, to withstand large currents, the wire diameter of the DC +/DC-power line 402 must be sufficiently large. Secondly, since the heat generation amount of the line is proportional to the square of the current, increasing the current flowing through the line causes the heat generation amount of the line to increase sharply. In this regard, embodiment 1 geometrically modifies the outer surface of the outer insulating sleeve 41 of the DC +/DC-power line 402 to enhance heat transfer.

As shown in fig. 3, in embodiment 1, a plurality of regularly arranged bumps are disposed on the outer surface of the insulating sleeve 41 outside the DC +/DC-power line 402. The geometric characteristics of the convex blocks on the cross section of the cable are fan-shaped, and adjacent convex blocks form an angle of 30 degrees with the axis and are distributed at equal intervals along the circumferential direction; the geometrical characteristics of the convex blocks on the section of the cable shaft are rectangular, the length of the convex blocks is larger than the distance, and the convex blocks are distributed at equal intervals along the axial direction. It should be understood that the uniform distribution of the protrusions along the circumferential direction and the axial direction does not limit the protrusions to be uniformly distributed along the circumferential direction and/or the axial direction, and any non-uniform distribution without departing from the arrangement of the protrusions belongs to the embodiments obtained without creative labor. In embodiment 1, by providing the protrusion, the heat exchange area of the outer surface of the insulating sleeve 41 is increased by 9.2%, the turbulence degree of the refrigerant liquid 50 is significantly increased, and the refrigeration effect is significantly improved.

In the cable cross-section, the return pipe 30 of the isolating separator layer 20 is located in the middle upper portion of the DC + and DC-power supply line 402 and in the middle lower portion of the low-voltage auxiliary power supply line 401. The design can ensure that the return pipe 30 is close to the power circuit as much as possible, thereby enhancing the secondary refrigeration effect of the return of the refrigerant liquid 50 on the power circuit.

The low-voltage auxiliary power supply line 401 is used for supplying power to a storage battery management system of the electric automobile. Although the low voltage auxiliary power supply line 401 emits much less heat than the DC +/DC-power supply line 402, it is disposed in the liquid chamber 52 for maximum space utilization due to its small wire diameter.

The direct current charging of electric vehicles in China adopts a CAN communication scheme, and a communication line 403 in the embodiment 1 generally refers to a line with a CAN communication function and a charging connection confirmation function. It should be understood that the number of the communication lines 403 may be plural in order to realize the CAN communication function and the charging connection confirmation function, and although only two communication lines 403 are provided in embodiment 1, this does not mean that the two communication lines 403 CAN perform all the communication functions. Meanwhile, any increase or decrease in the number of the wires 40 based on the embodiment 1 is an embodiment obtained without creative efforts.

The ground line 404 is used to provide ground protection for the charging process of the electric vehicle. The ground wire 404 may include a plurality of independently disposed sub-wires. In example 1, five ground sub-wires are present in the cavity 51. The cavity 51 is enclosed by the isolating separator 20 so that the ground line 404 does not have any effect even if the conductive refrigerant fluid 50 is used. In addition, the outside of the communication line 403 is covered with the insulating sleeve 41, and does not interfere with the ground line 404. Therefore, the insulating sleeve 41 does not need to be arranged outside the ground wire 404, and the design can further reduce the wire diameter and is beneficial to the light weight of the cable.

All the wires 40, including the low-voltage auxiliary power supply line 401, the DC +/DC-power supply line 402, the communication line 403, and the ground line 404, are copper wires, have certain ductility, and can be bent within a certain range. The DC +/DC-power line 402 adopts a stranded copper wire twisting form due to an excessively large wire diameter, which not only greatly increases the flexibility of the line, but also enables the curvature during bending to be distributed on each strand of copper wire, thereby reducing the generated bending stress, avoiding plastic deformation, and also avoiding the indirect damage of the insulation outer cover 10, the insulation separation layer 20, and the insulation sleeve 41. In addition, the overall shape of the DC + and DC-power supply lines 402 and their wrapped insulating sleeves 41 on the cable cross-section is circular/elliptical.

Example 2:

the liquid cooling cable for electric vehicle quick charging according to embodiment 1 is different from embodiment 1 in that: as shown in fig. 4 and 5, the inner cavity of the isolating separator 20 in this embodiment is a fluid cavity 52. An advantage of this arrangement is that the refrigerant fluid 50 in the fluid chamber 52 is not only within the insulating outer cover 10 but also within the insulating separating layer 20, reducing the risk of leakage of refrigerant fluid 50 to the external environment due to cable damage. The disadvantage of this arrangement is that the DC +/DC-power line 402 is surrounded by a double layer of insulation material. Compared with implementation 1, on the premise that the wire diameter of the liquid cooling cable is not changed, the wire diameter of the DC +/DC-power supply line 402 needs to be properly reduced to be arranged into the insulating separation layer 20, so that the maximum current allowed to pass through the line is reduced, and the potential of quick charging is reduced.

Example 2 differs from example 1 in that: as shown in fig. 6, a plurality of regularly arranged convex balls are arranged on the outer surface of the insulating sleeve 41 outside the DC +/DC-power line 402. The adjacent convex balls form an angle of 30 degrees with the axis and are distributed at equal intervals along the circumferential direction; the convex balls are distributed along the axial direction at equal intervals, and the radius of the convex balls is smaller than the axial distance. The placement of the insulating beads on the outer surface of the insulating sleeve 41 is another form of enhancing convective heat transfer. Besides the arrangement in embodiment 2, the convex balls can also be arranged spirally/wavelike/irregularly along the axial direction. In example 2, when the axial distance of the convex balls is sixteen times the radius of the convex balls, the heat exchange area of the outer surface of the insulating sleeve 41 is increased by 4.3%; as the density of the convex balls increases, the heat exchange area of the outer surface of the insulating sleeve 41 will increase. In addition, the turbulence degree of the refrigerant liquid 50 is obviously enhanced under the action of the convex balls, and the refrigeration effect is obviously improved.

Except for the above two points, other technical features of embodiment 2 are the same as those of embodiment 1, and are not repeated herein.

This embodiment separates through setting up insulating separate layer 20, will need not refrigerated wire to let the refrigeration liquid directly flow through from sap cavity 52, carry out direct cooling to DC + and DC-power supply line 402 simultaneously, avoid the uneven problem of heat transfer. In addition, the return pipe 30 provided in the middle of the power supply line can perform secondary cooling of the power supply line; on the other hand, the convex structure on the outer surface of the insulating sleeve 41 not only makes the refrigerant liquid 50 generate disturbance to intensify heat exchange when flowing, but also enlarges the heat exchange area between the refrigerant liquid 50 and the heat source. On the premise of not increasing the diameter of the existing charging cable, the cooling effect is effectively enhanced, the temperature rise of the high-power charging cable is controlled within an acceptable range, and the charging safety of the electric automobile is guaranteed.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. The utility model provides an electric automobile is liquid cooling cable for quick charge which characterized in that: comprises an insulating outer cover (10), an insulating separation layer (20), a return pipe (30), a lead (40), an insulating sleeve (41) and refrigerating fluid (50); the insulating outer cover (10) is of a cylindrical cavity structure with equal wall thickness and extends along the axial direction; the insulating separation layer (20) is positioned in the cavity structure of the insulating outer quilt (10) and is used for dividing the inner space of the insulating outer quilt (10) into a cavity (51) and a liquid cavity (52), the space of the two cavities is not communicated, the liquid cavity (52) is used as a liquid inlet channel, and the insulating separation layer (20) axially extends along with the insulating outer quilt (10); the return pipe (30) is refrigeration equipment for returning cooling liquid to the charging pile, and the return pipe (30) axially extends along with the insulating outer cover (10); the conductor (40) comprises a DC + and DC-power supply line (402), a low-voltage auxiliary power supply line (401), a ground line (404) and a communication line (403), and the conductor (40) axially extends along with the insulating outer cover (10); the insulating sleeve (41) wraps the outside of part of the leads (40), wherein the surfaces of the insulating sleeves (41) of the DC + and DC-two power lines (402) are provided with convex structures which are distributed equidistantly in the circumferential direction and the axial direction.

2. The liquid cooling cable for electric vehicle quick charging of claim 1, wherein: the insulating separation layer (20) is used for dividing the space inside the insulating outer cover (10) into two parts which do not interfere with each other so as to facilitate the arrangement of the lead (40) and the layout of the refrigeration circuit; the cavity (51) is a cavity inside the insulating separation layer (20); the liquid cavity (52) is a cavity outside the insulating separation layer (20) and inside the insulating outer cover (10); the cavity (51) contains a communication line (403) which does not need cooling, an insulating sleeve (41) outside the communication line and a ground wire (404); the liquid cavity (52) comprises a DC +/DC-power circuit (402) needing cooling, a low-voltage auxiliary power circuit (401), an insulating sleeve (41) outside the lead and a return pipe (30).

3. The liquid cooling cable for electric vehicle quick charging according to claim 1, wherein: the cross section of the insulating separation layer (20) is in a hollow arch shape, and the inner corners of the arch shape are subjected to fillet or bevel treatment to eliminate stress concentration of materials and ensure mechanical strength; the placing mode of the insulating separation layer (20) comprises two modes: in the first mode, the cambered surface of the insulating separation layer (20) is bonded on the inner wall of the insulating outer cover (10); in the second mode, the insulating separation layer (20) and the insulating outer cover (10) are integrally formed.

4. The liquid cooling cable for electric vehicle quick charging according to claim 1, wherein: the low-voltage auxiliary power supply line (401), the DC +/DC-power supply line (402) and the communication line (403) are wrapped by an insulating sleeve (41); the ground wire (404) may include a number of ground sub-wires within the inner cavity of the isolating separator layer.

5. The liquid cooling cable for electric vehicle quick charging of claim 1, wherein: the way of achieving the flow of the refrigerant fluid (50): the refrigerant fluid (50) flows from the charging infrastructure end to the charging pile end through the fluid chamber (52) and then flows to the charging infrastructure end through the return chamber (53) in the return pipe (30).

6. The liquid cooling cable for electric vehicle quick charging according to claim 1, wherein: the outer side of an insulating sleeve (41) of the DC +/DC-power circuit (402) is provided with a convex structure, and the convex structure has the functions of intensifying the disturbance of the refrigerating fluid (50) and increasing the heat convection area, so that the refrigerating effect is enhanced.

7. The liquid cooling cable for electric vehicle quick charging according to claim 1, wherein: the convex structure is in a block shape or a spherical shape; the geometric characteristics of the convex block on the cross section of the cable are fan-shaped, rectangular or trapezoidal; the geometric features of the bumps in the cross section of the cable axis are rectangular or trapezoidal.

8. The liquid cooling cable for electric vehicle quick charging according to claim 1, wherein: the lead (40) is formed by twisting a plurality of strands of stranded copper wire meshes; the return pipe (30) is a polytetrafluoroethylene pipe; the refrigerating fluid (50) is silicone oil, glycol or water.

Images