CN115064315A - Liquid cooling cable and fill electric pile - Google Patents

Abstract

The invention discloses a liquid-cooled cable and a charging pile, wherein the liquid-cooled cable includes a liquid-cooled main wire, an outer sheath and a second liquid-cooled tube; the liquid-cooled main wire includes a first wire, a second wire and a first wire Liquid cooling tube, the first wire includes a first conductive layer and an insulating layer wrapped around the first conductive layer, the second wire is provided with a second conductive layer, the second conductive layer is wrapped around the insulating layer, the first liquid cooling The tube is sleeved outside the second conductive layer, a gap is formed between the first liquid cooling tube and the second conductive layer, and the gap is used to fill the first cooling liquid; the outer sheath is sleeved on the liquid cooling main wire, and is connected with the liquid cooling A cavity is formed between the outer walls of the main wire; the second liquid cooling pipe is arranged in the cavity, and the second liquid cooling pipe is used to fill the second cooling liquid; one of the first cooling pipe and the second cooling pipe is the inlet and outlet. liquid pipe, and the other one is the liquid outlet pipe. The technical scheme of the invention realizes that the heat dissipation capability of the first wire and the second wire is improved under the condition of reducing the cross-sectional area of the liquid-cooled cable.

Description

Liquid-cooled cables and charging stations

technical field

The invention relates to the technical field of cables, in particular to a liquid-cooled cable and a charging pile applying the liquid-cooled cable.

Background technique

In recent years, the rapid development of electric vehicles has made the charging time of electric vehicles more and more concerned by consumers. Consumers increasingly hope that the charging time of electric vehicles can be shortened, so the demand for high-power charging piles is also increasing. . The charging liquid-cooled cables used in high-power charging piles have low heat dissipation efficiency. At present, in order to solve this technical problem, conductors with larger cross-sectional areas are usually used, resulting in a larger wire diameter of the charging liquid-cooled cable, and the entire liquid-cooled cable The weight of the cable is also large, which is not conducive to the operation of the staff.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose a liquid-cooled cable, which aims to solve the problems that the entire liquid-cooled cable has a thicker wire diameter and a large weight in order to dissipate heat from the liquid-cooled cable.

In order to achieve the above object, the liquid-cooled cable proposed by the present invention includes a liquid-cooled main wire, an outer sheath and a second liquid-cooled tube; the liquid-cooled main wire includes a first wire, a second wire, and a first liquid-cooled tube , the first wire includes a first conductive layer and an insulating layer covering the first conductive layer, the second wire is provided with a second conductive layer, and the second conductive layer is wrapped on the insulating layer layer, the first liquid cooling tube is sleeved outside the second conductive layer, a gap is formed between the first liquid cooling tube and the second conductive layer, and the gap is used to fill the first cooling tube The outer sheath is sleeved on the liquid-cooled main wire, and a cavity is formed between it and the outer wall of the liquid-cooled main wire; the second liquid-cooled pipe is set in the cavity, so The second liquid cooling pipe is used for filling the second cooling liquid; one of the first cooling pipe and the second cooling pipe is a liquid inlet pipe, and the other is a liquid outlet pipe.

Optionally, the liquid-cooled main line and the second liquid-cooled pipe are located on the same radial line.

Optionally, the first conductive layer, the insulating layer, the second conductive layer and the first liquid cooling tube are arranged coaxially.

Optionally, one of the first wire and the second wire is a positive wire, and the other is a negative wire.

Optionally, the liquid-cooled cable further includes a ground wire, and the ground wire is arranged in the cavity.

Optionally, the axis of the liquid-cooled main wire is deviated from the axis of the outer sheath, and the axis of the second liquid-cooled pipe and the ground wire is arranged on the outer sheath away from the axis of the liquid-cooled main wire side.

Optionally, the liquid-cooling cable further includes a signal line, and the signal line is arranged in the cavity and is arranged close to the second liquid-cooling tube.

Optionally, a plurality of the signal wires are provided, and the plurality of signal wires are stacked and arranged along the outer peripheral surfaces of the first liquid cooling tube and the second liquid cooling tube.

Optionally, the insulating layer, the first liquid cooling pipe and the second liquid cooling pipe are made of one of cross-linked polyolefin, polyester elastomer, polytetrafluoroethylene and polyamide.

The present invention also provides a charging pile, comprising the above-mentioned liquid-cooled cable and a liquid pump, wherein the liquid pump is communicated with the first liquid-cooled pipe and the second liquid-cooled pipe to form a circuit.

The technical solution of the present invention is that a first liquid cooling tube is arranged in the liquid cooling main wire, the first liquid cooling tube is sleeved with a first conductive layer and a second conductive layer, and the second liquid cooling tube is arranged in the outer sheath, The first liquid-cooling tube dissipates heat from the wires, which greatly improves the heat-dissipation capabilities of the first and second wires, so that the current flow in the liquid-cooled cable can be improved while reducing the cross-sectional area of the liquid-cooled cable. Compared with the solution in which the liquid cooling tube is independent of the first wire and the second wire, the diameter of the liquid cooling cable in the technical solution of the present invention is smaller. Further, by contacting the second conductive layer in the second wire with the first cooling liquid in the first liquid cooling tube, the first cooling liquid can more directly dissipate heat to the second conductive layer, thereby further improving the protection of the first cooling liquid. The heat dissipation effect of the two conductive layers.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a cross-sectional view of an embodiment of the liquid cooling cable of the present invention.

Description of reference numbers:

label name label name 1 Liquid-cooled cables 10 Liquid-cooled main lead 11 first wire 111 first conductive layer 113 Insulation 13 second wire 131 second conductive layer 15 first liquid cooling tube 151 first coolant 30 outer sheath 50 Second liquid cooling tube 51 secondary coolant 70 ground wire 90 signal line

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The present invention provides a liquid cooling cable 1 .

In the embodiment of the present invention, as shown in FIG. 1 , the liquid-cooled cable 1 includes a liquid-cooled main wire 10 , an outer sheath 30 and a second liquid-cooled pipe 50 ; the liquid-cooled main wire 10 includes a first wire 11 , a second Two wires 13 and a first liquid cooling tube 15. The first wire 11 includes a first conductive layer 111 and an insulating layer 113 wrapped around the first conductive layer 111. The second wire 13 is provided with a second conductive layer 131. The conductive layer 131 is covered outside the insulating layer 113, the first liquid cooling tube 15 is sleeved outside the second conductive layer 131, a gap is formed between the first liquid cooling tube 15 and the second conductive layer 131, and the gap is used to fill the first liquid cooling tube 15. a cooling liquid 151; the outer sheath 30 is sleeved on the outside of the liquid cooling main wire 10, and a cavity is formed between the outer wall of the liquid cooling main wire 10; the second liquid cooling pipe 50 is arranged in the cavity, and the second liquid cooling pipe 50 The second cooling liquid 51 is filled in the cold pipe 50; one of the first cooling pipe and the second cooling pipe is a liquid inlet pipe, and the other is a liquid outlet pipe.

In the technical solution of the present invention, the first wire 11 and the second wire 13 can be used as a DC wire, and can also be used as an AC wire. When the first wire 11 and the second wire 13 are used as a DC wire, the polarities of the two The opposite can be done, that is, the first wire 11 is the positive electrode and the second wire 13 is the negative electrode, or the first wire 11 is the negative electrode and the second wire 13 is the positive electrode. Of course, in other embodiments, the polarities of the first wire 11 and the second wire 13 may also be the same, that is, the first wire 11 and the second wire 13 are both positive or negative. In one embodiment, when the liquid-cooled cable 1 is used as a charging cable, during the cable process, the polarities of the first wire 11 and the second wire 13 are opposite, so as to realize the charging of electric vehicles or other electrical equipment that needs to be charged. Or the function of charging electronic devices.

Further, the first wire 11 and the second wire 13 are both nested in the first liquid cooling tube 15, that is, the first conductive layer 111 of the first wire 11 and the second conductive layer 131 of the second wire 13 are both disposed in the first liquid cooling tube 15. In a liquid cooling pipe 15, the first liquid cooling pipe 15 serves as a support for the circulation of the first cooling liquid 151 on the one hand, so that the first cooling liquid 151 can circulate in the first cooling pipe, and the first cooling liquid 151 flows through the second cooling liquid 151. The surface of the conductive layer 131 can absorb the heat of the second conductive layer 131, and the second conductive layer 131 covers the outer surface of the first wire 11, and then the heat of the first conductive layer 111 in the first wire 11 also passes through. The insulating layer 113 and the second conductive layer 131 are conducted into the first cooling liquid 151, so that the first cooling liquid 151 absorbs the heat of the first conductive layer 111 and the second conductive layer 131, so that the first conductive layer 111 and the second conductive layer 111 and the second conductive layer are conductive. The temperature of the layer 131 is lowered, the heat dissipation effect of the first wire 11 and the second wire 13 is improved, and the current carrying capacity of the first wire 11 and the second wire 13 is improved. On the other hand, the first liquid cooling tube 15 can have a good supporting effect on the first wire 11 and the second wire 13. The first wire 11 and the second wire 13 are arranged in the first liquid cooling tube 15, which can avoid the first wire 11 and the second wire 13. A lead 11 and a second lead 13 are displaced relative to the first liquid cooling tube 15 under the action of gravity.

Further, the first wire 11 includes an insulating layer 113, the insulating layer 113 covers the first conductive layer 111, the second conductive layer 131 covers the insulating layer 113, and the insulating layer 113 is the first conductive layer 111 and the second conductive layer 113. The two conductive layers 131 have an insulating effect, preventing the first conductive layer 111 from contacting the second conductive layer 131 or other conductors to cause a short circuit, and maintaining the overall safety of the liquid-cooled cable 1 . Specifically, in order to achieve the effect of wrapping the second conductive layer 131 on the outside of the first wire 11, the second conductive layer 131 can be pressed outside the insulating layer 113 of the first wire 11 by extrusion, and then the first conductive layer 131 The liquid cooling tube 15 is sleeved outside the second insulating layer 113 , thereby reducing the looseness of each part of the liquid cooling main conductor 10 . Alternatively, the second conductive layer 131 can be squeezed outside the insulating layer 113 of the first wire 11 by first twisting and then extruding, and the second conductive layer 131 can be directly immersed in the cooling liquid, and the cooling liquid can be selected to insulate Cooling liquid, this arrangement not only reduces the setting of the insulating layer 113 in the second wire 13, but also reduces the wire diameter of the liquid-cooled cable 1, and the conductors are directly immersed in the cooling liquid and are in direct contact with the cooling liquid, reducing the heat conduction distance. , strengthen the thermal conductivity, improve the cooling effect.

Further, a cavity is formed between the liquid-cooled main wire 10 and the outer sheath 30, and the second liquid-cooled pipe 50 is arranged in the cavity. The liquid cooling tubes are arranged separately, which avoids the influence between the two liquid cooling tubes, and ensures the effect of one of the liquid cooling tubes as a heat-absorbing liquid cooling tube, thereby ensuring the cooling effect. Similarly, the two liquid cooling pipes are arranged separately, which also reduces the assembly difficulty of the liquid cooling cable 1, facilitates the operation of the staff, and improves the installation efficiency. Wherein, both the first cooling liquid 151 and the second cooling liquid 51 can be water or liquid nitrogen as cooling liquids.

By covering the outer surface of the first conductive layer 111 with the insulating layer 113 and covering the outside of the insulating layer 113 with the second conductive layer 131, the first wire 11 and the second wire 13 can be insulated and isolated from each other, avoiding the need for the first wire 11 and the second wire 13 to be insulated from each other. The wire 11 and the second wire 13 have opposite polarities and a short circuit occurs. In addition, in the technical solution of the present invention, the insulating layer 113 is wrapped around the first conductive layer 111, and the second conductive layer 131 is wrapped around the insulating layer 113, so that each part of the liquid-cooled main conductor 10 is wrapped layer by layer. Therefore, the wire diameter of the liquid-cooled main wire 10 is reduced, thereby reducing the wire diameter of the liquid-cooled cable 1 . In addition, compared with the solution in which the two liquid-cooling tubes are both arranged on the liquid-cooling main line 10, the two liquid-cooling tubes are arranged separately in this solution, which avoids the influence between the two liquid-cooling tubes and ensures that one of them acts as an absorber. The effect of the heat of the liquid cooling tube, which in turn ensures the cooling effect.

Further, the liquid-cooled cable 1 is further provided with an outer sheath 30, the outer sheath 30 is sleeved outside the liquid-cooled main wire 10, and a cavity is formed between the liquid-cooled main wire 10, and the liquid-cooled cable 1 is also When other wires coexisting with the liquid-cooled main wire 10 are included, the other wires are arranged in the cavity, and the outer sheath 30 can close the liquid-cooled main wire 10 and other wires to avoid the gap between the liquid-cooled main wire 10 and other wires. form a loose state. Specifically, the material of the outer sheath 30 can be halogen-free and other non-toxic materials, so that the outer sheath 30 has better environmental protection performance; in addition, the outer sheath 30 can be made of thermoplastic elastomer material, so as to have A certain elastic space is provided for the liquid-cooled main wire 10 or other wires to be nested in it, and also has a better binding effect on the liquid-cooled main wire 10 or other wires through its own elasticity, so as to avoid the occurrence of internal wire bodies. loose situation.

The technical solution of the present invention is that a first liquid cooling pipe 15 is provided in the liquid cooling main wire 10, the first liquid cooling pipe 15 is sleeved with a first conductive layer 111 and a second conductive layer 131, and the second liquid cooling pipe 50 is Set in the outer sheath 30, the wires are dissipated through the first liquid-cooling tube 15, and the two liquid-cooling tubes are separated to avoid the influence between the two liquid-cooling tubes. For the heat dissipation capability of the second wire 13, the insulating layer 113 is wrapped around the first conductive layer 111, and the second conductive layer 131 is wrapped around the insulating layer 113, so that each part of the liquid-cooled main wire 10 is covered layer by layer. The structure of the liquid-cooled cable 1 can improve the current passing performance in the liquid-cooled cable 1 while reducing the cross-sectional area of the liquid-cooled cable 1, and is independent of the first wire 11 and the second wire 13 relative to the liquid-cooled tube. In addition, the diameter of the liquid-cooled cable 1 in the technical solution of the present invention is smaller. Further, by contacting the second conductive layer 131 in the second wire 13 with the first cooling liquid 151 in the first liquid cooling tube 15 , the first cooling liquid 151 can more directly dissipate heat to the second conductive layer 131 , thereby further improving the heat dissipation effect on the second conductive layer 131 .

In an embodiment of the present invention, as shown in FIG. 1 , the liquid cooling main line 10 and the second liquid cooling pipe 50 are located on the same radial line.

When the liquid-cooled main conductor 10 and the second liquid-cooled pipe 50 are located on the same radial line, the liquid-cooled main conductor 10 and the second liquid-cooled pipe 50 may be located on the radial line to form a cross-sectional plane of the liquid-cooled cable 1 . At the interface, the main liquid-cooled conductor 10 and the second liquid-cooled tube 50 can be arranged inside the outer sheath 30 so that other conductors are distributed on both sides of the interface. The layout is more compact. On the other hand, the gap between the outer surfaces of the first liquid cooling pipe 15 and the second liquid cooling pipe 50 can be fully utilized, and the wires can be fully arranged outside the first liquid cooling pipe 15 and the second liquid cooling pipe 50. The cooling effect of the liquid cooling tube is fully utilized, and the overall cooling of the liquid cooling cable 1 is achieved.

In an embodiment of the present invention, as shown in FIG. 1 , the first conductive layer 111 , the insulating layer 113 , the second conductive layer 131 and the first liquid cooling tube 15 are coaxially disposed.

By arranging the first liquid-cooling tube 15 , the first conductive layer 111 , the insulating layer 113 and the second conductive layer 131 coaxially, the appearance of the liquid-cooled main conductor 10 is further rounded, so as to satisfy the requirements for the first conductor 11 On the premise of reducing the temperature of the liquid-cooled main wire 10 and the second wire 13 , the maximum diameter of the liquid-cooled main wire 10 is reduced, thereby reducing the diameter of the entire liquid-cooled cable 1 , which is more convenient for the staff to operate the liquid-cooled cable 1 .

In an embodiment of the present invention, one of the first wire 11 and the second wire 13 is a positive wire, and the other is a negative wire.

The first wire 11 and the second wire 13 can be used as a DC wire or as an AC wire. When the first wire 11 and the second wire 13 are used as a DC wire, the polarities of the two can be opposite, that is, the first wire 11 is positive, the second lead 13 is negative, or the first lead 11 is negative, and the second lead 13 is positive.

In an embodiment of the present invention, as shown in FIG. 1 , the liquid cooling cable 1 further includes a ground wire 70 , and the ground wire 70 is arranged in the cavity and is arranged close to the second liquid cooling pipe 50 .

By arranging the ground wire 70, the safety of using the liquid-cooled cable 1 can be further improved, and it is suitable for use in high-power electrical equipment. In addition, by nesting the ground wire 70 in the cavity of the outer sheath 30, the outer sheath 30 can gather the ground wire 70 and the liquid-cooled main wire 10 inside it, so as to prevent the liquid-cooled cable 1 from being loose. Happening. Moreover, it can be understood that the ground wire 70 is disposed close to the second liquid cooling pipe 50 of the liquid cooling main wire 10, so the heat dissipated by the ground wire 70 during operation can be transferred to the second liquid cooling pipe 50, thereby realizing the The second cooling liquid 51 in the second liquid cooling pipe 50 can also have the effect of dissipating heat to the ground wire 70, and can further compact the structure and realize a smaller diameter of the liquid cooling cable.

Specifically, the ground wire 70 may be twisted on the liquid-cooled main wire 10 , or may be arranged parallel to the liquid-cooled main wire 10 , or the ground wire 70 and the liquid-cooled main wire 10 may be longitudinally wrapped in the outer sheath 30 . When the ground wire 70 is twisted on the liquid-cooled main wire 10 , the heat dissipated by the ground wire 70 during operation can be transferred to the first cooling liquid 151 and the second cooling liquid 51 , thereby cooling the ground wire 70 .

The ground wire 70 can also be twisted on the second liquid cooling tube 50 . At this time, most of the heat emitted by the ground wire 70 during operation will be absorbed by the second cooling liquid 51 , and the other part will be absorbed by the first cooling liquid 151 .

In an embodiment of the present invention, as shown in FIG. 1 , the axis of the liquid-cooled main wire 10 is deviated from the axis of the outer sheath 30 , and the second liquid-cooled pipe 50 and the ground wire 70 are arranged on the axis of the outer sheath 30 away from the axis of the outer sheath 30 . One side of the axis of the cold main conductor 10 .

By setting the axis of the liquid-cooled main wire 10 away from the axis of the outer sheath 30, a gap is formed between at least one side of the liquid-cooled main wire 10 and the inner wall of the outer sheath 30, so that the ground wire can be embedded in the gap 70 , thereby ensuring that the ground wire 70 , the liquid-cooled main wire 10 and the outer sheath 30 have relatively compact structures with each other to avoid loosening. It can be understood that on the side where the axis of the outer sheath 30 is away from the axis of the liquid-cooled main conductor 10, the gap between the liquid-cooled main conductor 10 and the outer sheath 30 is the largest, and the ground wire 70 and the second liquid-cooled pipe 50 may be The ground wire 70 and the second liquid cooling pipe 50 are arranged in the gap, that is, the ground wire 70 and the second liquid cooling pipe 50 are arranged on the side of the outer sheath 30 away from the axis of the liquid cooling main wire 10, so as to further make the ground wire 70 and the second liquid cooling pipe 50 The structure between the liquid-cooled main wire 10 and the outer sheath 30 is more compact.

Specifically, the side of the liquid-cooled main wire 10 away from the ground wire 70 may be in contact with the inner wall of the outer sheath 30 , and may also be filled with the outer sheath 30 by a filler. In order to further reduce the diameter of the liquid-cooled cable 1 , the side of the liquid-cooled main wire 10 away from the ground wire 70 may preferably be arranged in close contact with the inner wall of the outer sheath 30 .

In an embodiment of the present invention, as shown in FIG. 1 , the liquid cooling cable 1 further includes a signal wire 90 , and the signal wire 90 is arranged in the cavity.

When the liquid cooling cable 1 is used for charging, the signal line 90 in the liquid cooling cable 1 is used to transmit the charging signal. By arranging the signal wire 90 outside the main liquid cooling wire 10 and the second liquid cooling pipe 50 , the first liquid cooling pipe 15 and the second cooling liquid 51 can also dissipate heat to the signal wire 90 .

Further, when the above-mentioned ground wire 70 is provided in the liquid-cooled cable 1, the signal wire 90 can be arranged between the ground wire 70 and the outer sheath 30, so that the signal wire 90 can be filled with the liquid-cooled main wire 10 and the ground wire. The gaps between the wires 70 do not occupy additional space, thereby making each wire body in the liquid-cooled cable 1 more compact and stable, without increasing the diameter of the liquid-cooled cable 1 , which is convenient for staff to operate. Specifically, when the signal wire 90 is arranged between the ground wire 70 and the liquid-cooled main wire 10, the outer wall of the signal wire 90 can be in contact with both the ground wire 70 and the outer wall of the first liquid-cooled pipe 15, thereby avoiding the signal wire 90 and the ground wire. The whole composed of the wire 70 and the liquid-cooled main wire 10 is loose, which further reduces the diameter of the liquid-cooled cable.

In an embodiment of the present invention, as shown in FIG. 1 , a plurality of signal lines 90 are provided, and the plurality of signal lines 90 are stacked along the outer peripheral surfaces of the first liquid cooling tube 15 and the second liquid cooling tube 50 .

When there are multiple signal lines 90 , the multiple signal lines 90 may be the same type of signal lines 90 , or may be different types of signal lines 90 . A plurality of signal wires 90 can be stacked or wound on the liquid-cooled main wire 10 by first twisting and then extruding. It can be understood that, when the axis of the liquid-cooled main wire 10 and the axis of the outer sheath 30 are deviated, and the plane determined by the axis of the liquid-cooled main wire 10 and the axis of the outer sheath 30 is used as the interface, then the separation On the opposite sides of the interface, there is a certain gap between the liquid-cooled main wire 10 and the outer sheath 30 , and a plurality of signal wires 90 are scattered in the gap on the opposite sides of the interface. In addition, in the embodiment of the present invention, an interface is also formed between the liquid-cooled main wire 10 and the second liquid-cooled pipe 50 , and a plurality of signal wires 90 are scattered on the liquid-cooled main wire 10 and the second liquid-cooled pipe 50 to form a part. The opposite sides of the interface can make the layout of each conductor in the liquid-cooled cable 1 more compact, thereby avoiding the use of an outer sheath 30 with an excessively large diameter, reducing the diameter of the liquid-cooling cable 1 and making it more convenient for the staff. Operate the liquid cooling cable 1.

In an embodiment of the present invention, the insulating layer 113 , the first liquid cooling pipe 15 and the second liquid cooling pipe 50 are made of one of cross-linked polyolefin, polyester elastomer, polytetrafluoroethylene and polyamide.

The insulating layer 113, the first liquid cooling tube 15 and the second liquid cooling tube 50 may be made of one of cross-linked polyolefin, polyester elastomer, polytetrafluoroethylene and polyamide. It is understood that the insulating layer 113. The material of the first liquid cooling pipe 15 and the second liquid cooling pipe 50 may also be several kinds of cross-linked polyolefin, polyester elastomer, polytetrafluoroethylene and polyamide. By setting the material of the first liquid-cooling pipe 15 and the second liquid-cooling pipe 50 to one or a combination of the above-mentioned materials, the first liquid-cooling pipe 15 and the second liquid-cooling pipe 50 can also have insulating properties. Therefore, the first liquid cooling pipe 15 and the second liquid cooling pipe 50 can also perform insulation protection on the first conductive layer 111 and the second conductive layer 131 .

The present invention also provides a charging pile, the charging pile includes a liquid pump and a liquid cooling cable 1, and the liquid pump is connected with the first liquid cooling pipe 15 and the second liquid cooling pipe 50 to form a loop. The specific structure of the liquid-cooled cable 1 refers to the above-mentioned embodiments. Since the charging pile adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be omitted here. Repeat them one by one.

Further, the charging pile also includes a power source and a charging gun, and the above-mentioned liquid cooling cable 1 is connected to the power source and the charging gun. When the electric vehicle needs to be charged, the staff can hold the charging gun in one hand and pull the liquid cooling cable 1 to a suitable position in the other. Due to the above-mentioned structure of the liquid-cooled cable 1 , the diameter of the liquid-cooled cable 1 can be made smaller, which can facilitate the operator to perform the operation when pulling the liquid-cooled cable 1 . In addition, the charging pile also includes a liquid pump, which is communicated with the first liquid cooling pipe 15 and the second liquid cooling pipe 50, and the three are connected to form a cooling circuit, so that during the charging process, the first liquid cooling pipe 15 in the first liquid cooling pipe 15. The first cooling liquid 151 and the second cooling liquid 51 in the second liquid cooling tube 50 are in a flowing state, so that the heat generated by the first wire 11 and the second wire 13 can be taken away, and the first wire 11 and the second wire 13 can be lowered. The temperature of the liquid-cooled cable 1 is increased, the current carrying capacity of the liquid-cooled cable 1 can be increased, and the diameter of the liquid-cooled cable 1 can be further reduced, so that the arrangement of the liquid-cooled cable 1 can achieve a better virtuous circle.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the description and drawings of the present invention, or directly/indirectly applied to other All relevant technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A liquid cooled cable, comprising:

the liquid-cooled main conductor comprises a first conductor, a second conductor and a first liquid-cooled pipe, wherein the first conductor comprises a first conductive layer and an insulating layer coated outside the first conductive layer, the second conductor is provided with a second conductive layer, the second conductive layer is coated outside the insulating layer, the first liquid-cooled pipe is sleeved outside the second conductive layer, a gap is formed between the first liquid-cooled pipe and the second conductive layer, and the gap is used for filling first cooling liquid;

the outer sheath is sleeved on the liquid cooling main conducting wire, and a cavity is formed between the outer sheath and the outer wall of the liquid cooling main conducting wire; and

the second liquid cooling pipe is arranged in the cavity and is filled with a second cooling liquid;

one of the first cooling pipe and the second cooling pipe is a liquid inlet pipe, and the other one of the first cooling pipe and the second cooling pipe is a liquid outlet pipe.

2. The liquid-cooled cable of claim 1, wherein the liquid-cooled main conductor and the second liquid-cooled tube are located on a same radial line.

3. The liquid-cooled cable of claim 2, wherein the first conductive layer, the insulating layer, the second conductive layer, and the first liquid-cooled tube are coaxially disposed.

4. The liquid-cooled cable of any of claims 1-3, wherein one of the first lead and the second lead is a positive lead and the other is a negative lead.

5. The liquid-cooled cable of claim 1, further comprising a ground wire disposed within the cavity and proximate to the second liquid-cooled tube.

6. The liquid-cooled cable of claim 5, wherein an axis of the liquid-cooled main conductor is offset from an axis of the outer jacket, and the second liquid-cooled tube and the ground wire are disposed on a side of the axis of the outer jacket away from the axis of the liquid-cooled main conductor.

7. The liquid cooled cable of claim 1, further comprising a signal line disposed within the cavity.

8. The liquid-cooled cable of claim 7, wherein the signal lines are provided in a plurality, and wherein the signal lines are stacked along an outer circumferential surface of the first liquid-cooled tube and the second liquid-cooled tube.

9. The liquid-cooled cable of claim 1, wherein the insulating layer, the first liquid-cooled tube, and the second liquid-cooled tube are made of one of cross-linked polyolefin, polyester elastomer, polytetrafluoroethylene, and polyamide.

10. A charging pole comprising a liquid-cooled cable and a liquid pump according to any one of claims 1 to 9, the liquid pump being in communication with the first liquid-cooled tube and the second liquid-cooled tube to form a circuit.

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