Liquid cooling cable and charging pile

Abstract

The invention discloses a liquid cooling cable and a charging pile, and relates to the technical field of cables. The liquid-cooled cable comprises an outer sheath, and a liquid inlet pipeline, a liquid outlet pipeline and a plurality of wires which are arranged in the outer sheath, the first target pipeline is arranged in a central area in the outer sheath, the second target pipeline is arranged around the first target pipeline, the first target pipeline is one of a liquid inlet pipeline and a liquid outlet pipeline, and the second target pipeline is the other one of the liquid inlet pipeline and the liquid outlet pipeline; each wire is located between the first target pipeline and the second target pipeline. Through the structural design of the liquid-cooled cable, the heat dissipation capability of the liquid-cooled cable can be improved.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a liquid-cooled cable and a charging pile. Background Art

[0002] 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.

[0003] High-power charging piles have more stringent requirements for heat dissipation, and liquid-cooled cables can better meet consumers' fast charging needs.

[0004] However, in the related art, the heat dissipation capability of the liquid cooling cable is poor. Summary of the invention

[0005] The main purpose of this application is to propose a liquid-cooled cable and a charging pile, aiming to improve the heat dissipation capacity of the liquid-cooled cable.

[0006] To achieve the above-mentioned object, in a first aspect, the present application proposes a liquid cooling cable, comprising: the liquid cooling cable comprises: an outer sheath, a liquid inlet pipe, a liquid outlet pipe and a plurality of wires;

[0007] A first target pipeline is arranged in the central area of ​​the outer sheath, and a second target pipeline is arranged around the first target pipeline, wherein the first target pipeline is one of the liquid inlet pipeline and the liquid outlet pipeline, and the second target pipeline is the other of the liquid inlet pipeline and the liquid outlet pipeline;

[0008] Each of the guide wires is located between the first target pipe and the second target pipe.

[0009] In one embodiment, the first target pipeline is the liquid inlet pipeline, and the second target pipeline is the liquid outlet pipeline.

[0010] In one embodiment, the plurality of wires include a positive wire and a negative wire, and the positive wire and the negative wire are insulated from each other;

[0011] The positive lead is in contact with the first target pipe and the second target pipe respectively;

[0012] The negative electrode wire is in contact with the first target pipe and the second target pipe respectively.

[0013] In one embodiment, the positive electrode wire and the negative electrode wire are symmetrically arranged.

[0014] In one embodiment, the plurality of wires further include: a plurality of signal wires, each of the signal wires is located between the positive electrode wire and the negative electrode wire, and is insulated from the positive electrode wire and the negative electrode wire.

[0015] In one embodiment, the liquid cooling cable further comprises: a plurality of insulating columns, the plurality of insulating columns being distributed between the first target pipe and the second target pipe to divide the interval area between the first target pipe and the second target pipe into a plurality of distribution areas;

[0016] The plurality of conductive lines are respectively arranged in the plurality of distribution areas.

[0017] In one embodiment, the plurality of wires include: a positive wire, a negative wire and a plurality of signal wires;

[0018] There are at least three insulating columns, which divide the interval area between the first target pipeline and the second target pipeline into at least three distribution areas;

[0019] The positive electrode wire and the negative electrode wire are respectively arranged in the two distribution areas, and the plurality of signal lines are arranged in at least one distribution area.

[0020] In one embodiment, at least one of the first target pipe and the second target pipe is integrally formed with the plurality of insulating pillars.

[0021] In one embodiment, the liquid cooling cable further comprises a heat conducting layer; the heat conducting layer is arranged on the outer wall of the first target pipe, and / or the heat conducting layer is arranged on the outer wall of the second target pipe facing the first target pipe;

[0022] The heat conductive layer contacts at least some of the plurality of conductive lines.

[0023] In one embodiment, the plurality of wires include: a positive electrode wire and a negative electrode wire, and the heat conductive layer is in contact with the positive electrode wire and the negative electrode wire respectively.

[0024] In one embodiment, the cross-section of the first target pipeline is annular, and the cross-section of the second target pipeline is elliptical, circular, rectangular or annular; the cross-sectional area of ​​the liquid inlet pipeline is 0.8-1.2 times the cross-sectional area of ​​the liquid outlet pipeline.

[0025] In one embodiment, the cross-section of the first target pipeline is annular, and the cross-section of the second target pipeline is elliptical, circular, rectangular or annular; the cross-sectional area of ​​the liquid inlet pipeline is 0.9-1.1 times the cross-sectional area of ​​the liquid outlet pipeline.

[0026] In one embodiment, the cross-sectional areas of the liquid inlet pipe and the liquid outlet pipe are equal.

[0027] In a second aspect, the present application further provides a charging pile, comprising: a hydraulic pump and a liquid cooling cable as described in the first aspect, wherein the hydraulic pump is respectively connected to the liquid inlet pipe and the liquid outlet pipe to form a circulation loop.

[0028] The above-mentioned hydraulic cable and charging pile include: an outer sheath, a liquid inlet pipe, a liquid outlet pipe and a plurality of wires. The first target pipe is arranged in the central area of ​​the outer sheath, the second target pipe is arranged around the first target pipe, and each wire is located between the first target pipe and the second target pipe. Since the first target pipe is one of the liquid inlet pipe and the liquid outlet pipe, and the second target pipe is the other of the liquid inlet pipe and the liquid outlet pipe, the space inside the outer sheath can be fully utilized, and the pipe walls of the liquid inlet pipe and the liquid outlet pipe can be fully utilized as an insulating structure, which is conducive to increasing the effective cross-sectional space of the liquid inlet pipe, the liquid outlet pipe and each wire, and the liquid inlet pipe and the liquid outlet pipe cool different sides of the wire respectively. This double-sided cooling method greatly increases the effective heat dissipation area of ​​the coolant to the wire, shortens the heat transfer path, and effectively reduces the thermal resistance from the wire to the coolant, thereby significantly suppressing the temperature rise of the cable and improving the heat dissipation capacity of the liquid-cooled cable. Moreover, the increase in the cross-sectional area of ​​the wire effectively reduces the resistance of the cable and reduces the heat generated by the wire during the power-on process. Increasing the effective cross-sectional space of the water pipe can increase the flow cross-sectional area of ​​the water pipe. Under the action of the same coolant flow driving device, the flow rate of the coolant can be significantly increased. A higher flow rate means that the coolant's own temperature rise is smaller during the process of absorbing cable heat, which is beneficial to further improve the heat dissipation capacity of the liquid-cooled cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the cross-sectional structure of a liquid cooling cable in one embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of the cross-sectional structure of a liquid cooling cable in another embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of a liquid cooling cable in yet another embodiment of the present application.

[0033] Description of Figure Numbers:

[0034] 1-outer sheath, 2-first target pipeline, 3-second target pipeline, 4-conducting wire, 41-positive electrode conducting wire, 42-negative electrode conducting wire, 43-signal wire, 5-insulating column, 6-heat conducting layer.

[0035] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0039] As described in the background technology, 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. High-power charging piles have more stringent requirements for heat dissipation, and liquid-cooled cables can better meet consumers' fast charging needs. However, in the related technology, the heat dissipation capacity of liquid-cooled cables is poor.

[0040] Based on this, Figure 1 As shown, the present application provides a liquid cooling cable, which includes: an outer sheath 1, a liquid inlet pipe, a liquid outlet pipe and a plurality of wires 4.

[0041] The first target pipeline 2 is arranged in the central area of ​​the outer sheath 1, and the second target pipeline 3 is arranged around the first target pipeline 2, wherein the first target pipeline 2 is one of the liquid inlet pipeline and the liquid outlet pipeline, and the second target pipeline 3 is the other of the liquid inlet pipeline and the liquid outlet pipeline. Each wire 4 is located between the first target pipeline 2 and the second target pipeline 3. It should be noted that the second target pipeline 3 includes an outer pipe wall and an inner pipe wall, the inner pipe wall is the pipe wall close to the first target pipeline 2, and the outer pipe wall is the pipe wall away from the first target pipeline 2.

[0042] Among them, the outer sheath 1 is used to protect the entire liquid-cooled cable. The material of the outer sheath 1 may include one or more of polyvinyl chloride (PVC), thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer (TPU), and rubber material. The shape of the outer sheath 1 can be set to be cylindrical. The liquid inlet pipe and the liquid outlet pipe can be made of flexible heat-conducting materials, such as cross-linked polyethylene (XLPE). The liquid inlet pipe and the liquid outlet pipe can also be made of other materials, such as silicone or polyurethane materials. The liquid inlet pipe and the liquid outlet pipe are used for the circulation of the coolant, and the heat generated by the wire 4 is taken away through the heat exchange between the wire 4 and the coolant, thereby realizing the cooling of the wire 4. It should be noted that the specific materials of the outer sheath 1, the liquid inlet pipe and the liquid outlet pipe are not limited here, and the corresponding materials can be selected according to the needs of the user in the application.

[0043] It should also be noted that the coolant in the present application can be water, or other types of liquids, such as a mixture of water and ethylene glycol. In practical applications, users can select a suitable type of coolant according to their needs.

[0044] In the related art, the coolant is often driven by a hydraulic pump to circulate in the liquid-cooled cable. Common liquid cooling structures include multi-tube liquid cooling structure and copper-clad water structure. Taking the multi-tube liquid cooling structure as an example, it constructs multiple cooling channels by setting multiple liquid cooling tubes around or inside the conductor. However, this structural design leads to a significant increase in pressure drop, which places extremely high demands on the performance of the pump; at the same time, the thermal resistance from the conductor to the liquid is large, which seriously affects the heat dissipation efficiency; in addition, its inlet and outlet liquid pipes need to be configured in pairs, and the overall structure is complex and cumbersome, which not only increases the production cost and manufacturing difficulty, but also makes the cable surface temperature high. Another common copper-clad water structure adopts a concentric symmetrical dispersed layout. Compared with the multi-tube liquid cooling structure, its conductor to liquid cooling thermal resistance is reduced, but it still cannot get rid of the dilemma of large pressure drop and strong dependence on pump performance. Moreover, its inlet and outlet liquid pipes need to be diverted with the help of a multi-pass structure, which also has the problem of complex structure, and the cable surface temperature has not been effectively improved.

[0045] Corresponding to this embodiment, it can be understood that the first target pipeline 2 is arranged in the central area of ​​the outer sheath 1, the second target pipeline 3 is arranged around the first target pipeline 2, and each wire 4 is located between the first target pipeline 2 and the second target pipeline 3, which can make full use of the internal space of the outer sheath 1, and can make full use of the pipe wall of the first target pipeline 2 and the second target pipeline 3 as an insulating structure, and increase the effective cross-sectional space of each wire 4, the first target pipeline 2 and the second target pipeline 3. This design can also allow the first target pipeline 2 and the second target pipeline 3 to dissipate heat from different surfaces of each wire 4, so that the contact area between the first target pipeline 2 and the wire 4 is larger, and the contact area between the second target pipeline 3 and the wire 4 is larger, which can effectively reduce the conduction thermal resistance from the wire 4 to the first target pipeline 2 and the second target pipeline 3, and improve the heat reduction efficiency of each wire 4. On the basis of making full use of the internal space of the outer sheath 1, the area of ​​the liquid inlet of the liquid inlet pipeline and the liquid outlet of the liquid outlet pipeline can be larger, so that the flow rate of the coolant can be increased, and the increase in flow rate can effectively reduce the temperature rise of the coolant caused by heat absorption along the pipeline, thereby improving the uniformity of cooling the conductor and improving the cooling capacity. In addition, the increase in the cross-sectional area of ​​the wire 4 can improve the current carrying capacity of the cable, and effectively reduce the resistance of the wire 4, reduce the heat generation power of the wire 4 during the power-on process, thereby reducing the heat generated by the wire 4, which is conducive to further reducing the temperature of the liquid-cooled cable.

[0046] It can also be understood that by cleverly placing the wire 4 between the first target pipe 2 and the second target pipe 3, the second target pipe 3 can be used to block the contact between the wire 4 and the outer sheath 1, effectively cutting off the direct conduction path of the wire heat to the outer sheath 1. Under this structural design, the temperature of the outer sheath 1 can be close to the temperature of the coolant, thereby successfully avoiding the risk of scalding the user caused by the excessive temperature of the outer sheath 1, greatly improving the safety of the product.

[0047] The above-mentioned hydraulic cable includes: an outer sheath 1, a liquid inlet pipe, a liquid outlet pipe and a plurality of conductors 4. The first target pipe 2 is arranged in the central area of ​​the outer sheath 1, the second target pipe 3 is arranged around the first target pipe 2, and each conductor 4 is located between the first target pipe 2 and the second target pipe 3. Since the first target pipe 2 is one of the liquid inlet pipe and the liquid outlet pipe, and the second target pipe 3 is the other of the liquid inlet pipe and the liquid outlet pipe, the space inside the outer sheath 1 can be fully utilized, and the pipe walls of the liquid inlet pipe and the liquid outlet pipe can be fully utilized as an insulating structure, which is conducive to increasing the effective cross-sectional space of the liquid inlet pipe, the liquid outlet pipe and each conductor 4, and the liquid inlet pipe and the liquid outlet pipe cool different sides of the conductor 4 respectively. This double-sided cooling method greatly increases the effective heat dissipation area of ​​the coolant to the conductor 4, shortens the heat transfer path, and effectively reduces the thermal resistance of the conductor 4 to the coolant, thereby significantly suppressing the cable temperature rise and improving the heat dissipation capacity of the liquid-cooled cable. Moreover, the increase in the cross-sectional area of ​​the conductor 4 effectively reduces the resistance of the cable and reduces the heat generation power of the conductor 4 during the power-on process. Increasing the effective cross-sectional space of the water pipe can increase the flow cross-sectional area of ​​the water pipe. Under the action of the same coolant flow driving device, the flow rate of the coolant can be significantly increased. A higher flow rate means that the coolant's own temperature rise is smaller during the process of absorbing the heat of the cable, which is beneficial to further improve the heat dissipation capacity of the liquid-cooled cable.

[0048] In one embodiment, Figure 1 As shown, the first target pipeline 2 is a liquid inlet pipeline, and the second target pipeline 3 is a liquid outlet pipeline.

[0049] It can be understood that since the temperature of the coolant just flowing into the inlet pipe is lower than the temperature in the outlet pipe, the cooling effect of the inlet pipe is greater than the cooling effect of the outlet pipe. For example, the temperature of the coolant just flowing into the inlet pipe may be 25°C, and the temperature rises to 28°C when flowing to the end of the inlet pipe; and the temperature reaches 35°C when flowing out of the outlet pipe.

[0050] On this basis, by making the first target pipe 2 a liquid inlet pipe and the second target pipe 3 a liquid outlet pipe, the liquid inlet pipe can be arranged around the liquid outlet pipe, thereby making the outer surface of the liquid inlet pipe larger than the outer surface of the liquid outlet pipe. When the outer surface of the liquid inlet pipe is larger than the outer surface of the liquid outlet pipe, the contact area between the liquid inlet pipe and the wire 4 is larger than the contact area between the liquid outlet pipe and the wire 4, thereby further amplifying the cooling effect of the liquid inlet pipe, improving the heat dissipation effect on the wire 4, and further improving the heat dissipation capacity of the liquid-cooled cable.

[0051] In one embodiment, Figure 1As shown, the plurality of wires 4 include a positive wire 41 and a negative wire 42, and the positive wire 41 and the negative wire 42 are insulated. The positive wire 41 is in contact with the first target pipeline 2 and the second target pipeline 3 respectively. The negative wire 42 is in contact with the first target pipeline 2 and the second target pipeline 3 respectively.

[0052] like Figure 1 As shown, the outer surface of the positive wire 41 can contact the first target pipeline 2, and the inner surface of the positive wire 41 can contact the second target pipeline 3. The outer surface of the negative wire 42 can contact the first target pipeline 2, and the inner surface of the negative wire 42 can contact the second target pipeline 3.

[0053] The positive electrode wire 41 and the negative electrode wire 42 cooperate to form a complete charging circuit between the charging pile, the liquid cooling cable and the battery, so that the charging pile can charge the battery through the liquid cooling cable, thereby replenishing energy for the battery.

[0054] It can be understood that by contacting the outer surface of the positive wire 41 with the first target pipe 2, the inner surface of the positive wire 41 with the second target pipe 3, and the outer surface of the negative wire 42 with the first target pipe 2, and the inner surface of the negative wire 42 with the second target pipe 3, the inner surfaces of the positive wire 41 and the negative wire 42 can be dissipated through the first target pipe 2, and the outer surfaces of the positive wire 41 and the negative wire 42 can be dissipated through the second target pipe 3, thereby dissipating the inner and outer surfaces of the positive wire 41 and the negative wire 42 at the same time. Compared with the solution in the related art in which the cooling pipe is in single-sided contact with the wire 4, the heat dissipation efficiency is significantly improved, so that the heat generated by the positive wire 41 and the negative wire 42 during operation can be efficiently introduced into the coolant through the two paths of the liquid inlet pipe and the liquid outlet pipe. This double-sided cooling method greatly shortens the heat transfer path and effectively reduces the thermal resistance from the positive wire 41 and the negative wire 42 to the coolant, thereby significantly suppressing the temperature rise of the positive wire 41 and the negative wire 42, ensuring the stable operation of the positive wire 41 and the negative wire 42 under high-power charging conditions, and improving the charging stability and safety of the liquid-cooled cable.

[0055] In one embodiment, Figure 1 As shown, the positive electrode wire 41 and the negative electrode wire 42 are symmetrically arranged. The cross section of the positive electrode wire 41 and the cross section of the negative electrode wire 42 can be symmetrically arranged relative to the center point of the cross section of the outer sheath 1.

[0056] It can be understood that the positive wire 41 and the negative wire 42 are symmetrically arranged, and the cross-sectional shape and area of ​​the positive wire 41 and the negative wire 42 are the same. Therefore, the electrical parameters such as resistance and inductance of the positive wire 41 and the negative wire 42 are similar. According to Kirchhoff's law, in the same circuit, the current will be evenly distributed on the path with the same parameters. Therefore, the positive wire 41 and the negative wire 42 can achieve a more balanced current distribution, avoiding local overheating caused by uneven current distribution and affecting charging stability.

[0057] In addition, the positive electrode wire 41 and the negative electrode wire 42 are symmetrically arranged, and the contact area between the outer surface of the positive electrode wire 41 and the negative electrode wire 42 and the first target pipe 2 is basically the same, and the contact area between the inner surface of the positive electrode wire 41 and the negative electrode wire 42 and the second target pipe 3 is basically the same, so that the heat exchange efficiency between the positive electrode wire 41 and the negative electrode wire 42 and the coolant is similar, which can reduce the temperature difference between the positive electrode wire 41 and the negative electrode wire 42, and improve the charging stability and safety of the liquid-cooled cable.

[0058] In one embodiment, Figure 1 As shown, the plurality of wires 4 further include: a plurality of signal wires 43 , each signal wire 43 is respectively located between the positive wire 41 and the negative wire 42 , and is respectively insulated from the positive wire 41 and the negative wire 42 .

[0059] Among them, the signal line 43 in the charging pile liquid cooling cable is used to transmit various control, monitoring and communication signals to ensure accurate and efficient interaction between the charging pile and the electric vehicle, such as the charging control signal line 43 and the communication signal.

[0060] It can be understood that there is a gap space between the positive wire 41 and the negative wire 42. Each signal line 43 is respectively arranged in the gap space between the positive wire 41 and the negative wire 42, which can further improve the space utilization inside the outer sheath 1, improve the compactness of the charging pile liquid cooling cable, and reduce the invalid space inside the outer sheath 1, so as to increase the flow cross-section of the liquid inlet pipe and the liquid outlet pipe.

[0061] It should be noted that the charging pile liquid cooling cable may also include a ground wire, and the ground wire may also be arranged between the positive electrode wire 41 and the negative electrode wire 42 .

[0062] In one embodiment, Figure 1 As shown, the liquid cooling cable further includes: a plurality of insulating columns 5, which are distributed between the first target pipeline 2 and the second target pipeline 3, and divide the interval area between the first target pipeline 2 and the second target pipeline 3 into a plurality of distribution areas. A plurality of conductors 4 are respectively arranged in the plurality of distribution areas.

[0063] Wherein, each insulating column 5 can be arranged on the surface of the liquid inlet pipe and the liquid outlet pipe.

[0064] It can be understood that by arranging multiple wires 4 in multiple areas divided by multiple insulating columns 5, the wires 4 located in different areas can be insulated, thereby ensuring the electrical insulation performance between the lines and ensuring the safety and stability of the charging process. In addition, the insulating column 5 can provide mechanical support and fixation for each wire 4. During the use of the charging pile, the cable may be subjected to external forces such as stretching, bending, and vibration. The insulating column 5 can maintain each wire 4 in a relatively fixed position, prevent the insulation layer from being damaged due to friction and displacement between the wires 4, avoid signal interference or electrical performance degradation due to changes in the position of the wire 4, and extend the service life of the liquid-cooled cable.

[0065] In one embodiment, Figure 1 As shown, the plurality of wires 4 include a positive wire 41 , a negative wire 42 and a plurality of signal wires 43 .

[0066] There are at least three insulating columns 5, which divide the interval area between the first target pipeline 2 and the second target pipeline 3 into at least three distribution areas. The positive wire 41 and the negative wire 42 are respectively arranged in two distribution areas, and the plurality of signal lines 43 are arranged in at least one distribution area.

[0067] The insulating column 5 can isolate different types of wires 4 to prevent short circuits between wires 4 of different types. Figure 1 As shown, the insulating column 5 may be located between the signal line 43 and the positive electrode wire 41 , and between the signal line 43 and the negative electrode wire 42 .

[0068] For example, Figure 1 As shown, the insulating column 5 can be used to divide the first distribution space, the second distribution space, the third distribution space and the fourth distribution space, the positive wire 41 is arranged in the first distribution space, the negative wire 42 is arranged in the second distribution space, and the multiple signal lines 43 are divided into two parts and are respectively arranged in the third distribution space and the fourth distribution space, the first distribution space and the second distribution space can be symmetrically arranged, and the third distribution space and the fourth distribution space can be symmetrically arranged.

[0069] It can be understood that by setting the insulating column 5 between the signal line 43 and the positive wire 41, and between the signal line 43 and the negative wire 42, the signal line 43 and the positive wire 41 can be insulated, and the signal line 43 and the negative wire 42 can be insulated, so as to construct an insulating barrier between the signal line 43 and the positive wire 41, and between the signal line 43 and the negative wire 42. When the charging pile is working, the positive and negative wires carry high voltage currents. If they are in direct contact with the signal line 43 or too close to each other, they may cause current leakage, abnormal signal transmission, and even cause safety accidents such as short circuits. The insulating column 5 can effectively prevent this from happening, ensure the electrical insulation performance between the lines, and ensure the safety and stability of the charging process. In addition, the insulating column 5 provides mechanical support and fixing for the signal line 43, the positive wire 41 and the negative wire 42. During the use of the charging pile, the cable may be subjected to external forces such as stretching, bending, and vibration. The insulating column 5 can maintain each wire 4 in a relatively fixed position, prevent the insulation layer from being damaged due to friction and displacement between the wires 4, avoid signal interference or electrical performance degradation due to position changes of the wires 4, and extend the service life of the cable.

[0070] In one embodiment, at least one of the first target pipeline 2 and the second target pipeline 3 may be integrally formed with a plurality of insulating columns 5. In one example, the first target pipeline 2 is integrally formed with a plurality of insulating columns 5. In another example, the inner wall of the second target pipeline 3 is integrally formed with a plurality of insulating columns. In yet another example, Figure 2 As shown, the first target pipeline 2, the plurality of insulating columns 5 and the inner wall of the second target pipeline 3 are integrally formed. It should be noted that: Figure 2 In the structure shown, the inner ring portion is the first target pipeline 2, the middle portion is a plurality of distribution spaces separated by insulating columns 5, and the outermost portion is the inner pipe wall of the second target pipeline 2 connected to a plurality of insulating columns 5.

[0071] In this embodiment, by integrally forming at least one of the first target pipeline 2 and the second target pipeline 3 with the plurality of insulating columns 5, the structural performance of the liquid cooling cable can be optimized and the manufacturing process can be simplified. At the same time, it can ensure that the plurality of insulating columns 5 are closely combined with the corresponding pipelines to synergistically play an insulating role.

[0072] In one embodiment, Figure 3 As shown, the liquid cooling cable further includes a heat conducting layer 6. The heat conducting layer 6 is disposed on the outer wall of the first target pipe 2, and / or, the heat conducting layer 6 is disposed on the outer wall of the second target pipe 3 facing the first target pipe 2. The heat conducting layer 6 contacts at least part of the plurality of wires 4.

[0073] The heat-conducting layer 6 may be made of a heat-conducting material with a high thermal conductivity, such as thermal grease, graphite heat-conducting sheet, potting glue material, and other heat-conducting materials.

[0074] It can be understood that by providing a heat-conducting layer 6 between the wire 4 and the first target pipeline 2, the heat-conducting layer 6 can effectively fill the microscopic roughness between the surface of the wire 4 and the surface of the first target pipeline 2, reduce the contact thermal resistance, significantly reduce the interface thermal resistance from the wire 4 to the first target pipeline 2, and ensure that heat can be smoothly transferred from the wire 4 to the first target pipeline 2, so as to achieve efficient heat dissipation. Similarly, by providing a heat-conducting layer 6 between the wire 4 and the second target pipeline 3, the heat-conducting layer 6 can effectively fill the microscopic roughness between the surface of the wire 4 and the surface of the second target pipeline 3, reduce the contact thermal resistance, significantly reduce the interface thermal resistance from the wire 4 to the second target pipeline 3, and ensure that heat can be smoothly transferred from the wire 4 to the second target pipeline 3, so as to achieve efficient heat dissipation. Therefore, by providing a heat-conducting layer 6, heat dissipation can be accelerated, the temperature of the liquid-cooled cable can be prevented from being too high, and the efficient operation of the charging system can be ensured.

[0075] In one embodiment, Figure 3 As shown, the plurality of wires 4 include a positive wire 41 and a negative wire 42 , and the heat conductive layer 6 is in contact with the positive wire 41 and the negative wire 42 , respectively.

[0076] It can be understood that during the charging process, a large amount of heat will be generated when a large current passes through the positive wire 41 and the negative wire 42. By setting a heat-conducting layer 6 between the liquid inlet pipe and the positive wire 41, between the liquid inlet pipe and the negative wire 42, and / or, between the liquid outlet pipe and the positive wire 41, between the liquid outlet pipe and the negative wire 42. The heat generated by the wire 4 can be quickly transferred to the coolant in the cooling pipe through the heat-conducting layer 6, which accelerates the heat dissipation, prevents the cable temperature from being too high, and ensures the efficient operation of the charging system. Moreover, taking the example of setting a heat-conducting layer 6 between the liquid inlet pipe and the positive wire 41, and between the liquid inlet pipe and the negative wire 42, by setting a heat-conducting layer 6, the heat transfer between the liquid inlet pipe and the positive and negative wires 42 can be made more uniform, avoiding local overheating. Since the heat generation of the positive and negative wires 42 may be different during charging, the heat-conducting layer 6 can evenly distribute the heat between the two, and then transfer it to the coolant, which can ensure that the temperature of each part of the liquid-cooled cable is within a reasonable range, and extend the service life of the liquid-cooled cable and related components.

[0077] It should be noted that the heat conducting layer 6 may also be in contact with other conducting wires 4 , for example, the heat conducting layer 6 may also be in contact with the signal wire 43 .

[0078] In one embodiment, the cross section of the first target pipeline 2 is annular, and the cross section of the second target pipeline 3 is circular, elliptical, rectangular or annular. The cross section area of ​​the liquid inlet pipeline is 0.8-1.2 times the cross section area of ​​the liquid outlet pipeline.

[0079] For example, Figures 1 to 3As shown, the cross section of the first target pipeline 2 is annular, and the cross section of the second target pipeline 3 is circular. It can be understood that the shape of the outer sheath 1 is generally cylindrical. In this case, the cross section of the outer sheath 1 can be circular. By making the cross section of the first target pipeline 2 annular, the shape of the outer sheath 1 can be matched to the shape of the outer sheath 1, so that the first target pipeline 2 is in close contact with the outer sheath 1, and the invalid space is reduced. If the cross section of the second target pipeline 3 is circular, the first target pipeline 2, the wire 4 and the second target pipeline 3 can be arranged in a circular centralized manner, which is conducive to improving compactness, thereby increasing the cross-sectional panel of the wire 4 and the pipeline, and achieving more efficient power transmission and heat dissipation effects in a limited space. In addition, the cross-sectional dimensions of the wire 4 and the pipeline can be distributed more evenly, ensuring the reliability of the wire 4 and the pipeline, thereby improving the reliability of the liquid cooling cable.

[0080] It should be noted that the cross-section of the first target pipe 2 is annular and the cross-section of the second target pipe 3 is circular, which are only examples given in the present application. The cross-section shapes of the first target pipe 2 and the second target pipe 3 can also be other shapes, such as the aforementioned elliptical, rectangular or annular shapes. In application, the cross-section shape of the wire 4 can be adaptively adjusted according to the cross-section shapes of the first target pipe 2 and the second target pipe 3 to reduce the ineffective space inside the outer sheath 1.

[0081] As another example, the cross-sectional area of ​​the liquid inlet pipe can be 0.8, 0.9, 1, 1.1 or 1.2 times the cross-sectional area of ​​the liquid outlet pipe. It should be noted that the above examples do not constitute a limitation to this embodiment, and in application, the ratio of the cross-sectional area of ​​the liquid inlet pipe to the cross-sectional area of ​​the liquid outlet pipe can be any value between 0.8 and 1.2.

[0082] It can be understood that by making the ratio of the cross-sectional area of ​​the liquid inlet pipe and the liquid outlet pipe range from 0.9 to 1.1, the flow rate of the coolant in the inlet and outlet water pipes can be close, so as to facilitate the balance of the flow rate of the coolant in the inlet and outlet water pipes and ensure the stable operation of the cooling system. In addition, when the cross-sectional area ratio of the liquid inlet pipe and the liquid outlet pipe is close to 1, the coolant flows more smoothly in the pipeline system, reducing the pressure loss caused by factors such as sudden changes in the pipeline cross section, reducing the workload of the cooling pump, extending the service life of the cooling pump, and also saving energy. The ratio within this range also helps to maintain the stability of the pressure in the pipeline, avoid the impact on the pipeline system due to excessive pressure fluctuations, reduce the risk of pipeline rupture and leakage, and improve the reliability and safety of the liquid cooling system.

[0083] In one embodiment, the cross section of the first target pipeline 2 is annular, and the cross section of the second target pipeline 3 is elliptical, circular, rectangular or annular. The cross section area of ​​the liquid inlet pipeline is 0.9-1.1 times the cross section area of ​​the liquid outlet pipeline.

[0084] Exemplarily, the cross-sectional area of ​​the liquid inlet pipe can be 0.9, 0.95, 1, 1.05, or 1.1 times the cross-sectional area of ​​the liquid outlet pipe. It should be noted that the above examples do not constitute a limitation to this embodiment, and in application, the ratio of the cross-sectional area of ​​the liquid inlet pipe to the cross-sectional area of ​​the liquid outlet pipe can be any value between 0.9 and 1.1.

[0085] In this embodiment, the cross-sectional area ratio of the liquid inlet pipe and the liquid outlet pipe is made closer to 1, thereby further improving the reliability and safety of the liquid cooling system.

[0086] In one embodiment, Figures 1 to 3 As shown, the cross-sectional areas of the liquid inlet pipe and the liquid outlet pipe are equal.

[0087] It can be understood that the cross-sectional areas of the liquid inlet pipe and the liquid outlet pipe are equal. This design can maintain the flow balance of the coolant in the inlet and outlet pipes, ensure the stable operation of the cooling system, and avoid local overheating or uneven cooling caused by flow differences.

[0088] An embodiment of the present application further provides a charging pile, comprising: a hydraulic pump and a liquid cooling cable as in any of the above schemes, wherein the hydraulic pump is respectively connected to a liquid inlet pipe and a liquid outlet pipe to form a circulation loop.

[0089] The above charging pile drives the coolant to circulate in the cooling pipe of the liquid-cooled cable through a hydraulic pump. The liquid-cooled cable includes an outer sheath 1, a cooling pipe and a plurality of wires 4. The cooling pipe includes a liquid inlet pipe and a liquid outlet pipe. By symmetrically arranging the liquid inlet pipe and the liquid outlet pipe in the central area, and arranging each wire 4 in the peripheral area surrounding the central area, the space inside the outer sheath 1 can be fully utilized, and the sheath and the cooling pipe can be fully utilized as an insulating structure to increase the effective cross-sectional space of each wire 4 and the cooling pipe, so that the contact area between each wire 4 and the cooling pipe is larger, which can effectively reduce the conduction thermal resistance from the cable to the cooling pipe, and improve the heat reduction efficiency of the cooling pipe for each wire 4, thereby improving the heat dissipation capacity of the liquid-cooled cable. In addition, the liquid-cooled cable adopts the above structural design, which can make the area of ​​the liquid inlet of the liquid inlet pipe and the liquid outlet of the liquid outlet pipe larger, increase the flow cross-sectional area of ​​the liquid inlet pipe and the liquid outlet pipe, and increase the flow rate of the coolant under the same hydraulic pump. Increasing the flow rate of the coolant can effectively reduce the temperature rise of the coolant caused by heat absorption along the pipeline, thereby improving the cooling effect and further improving the heat dissipation capacity of the liquid-cooled cable. In summary, the liquid-cooled cable of the charging pile has a high heat dissipation capacity. On this basis, the charging reliability and safety of the charging pile are relatively high.

[0090] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A liquid cooling cable, characterized in that: include: The liquid cooling cable comprises: an outer sheath, and a liquid inlet pipe, a liquid outlet pipe and a plurality of wires arranged inside the outer sheath; A first target pipeline is arranged in the central area of ​​the outer sheath, and a second target pipeline is arranged around the first target pipeline, wherein the first target pipeline is one of the liquid inlet pipeline and the liquid outlet pipeline, and the second target pipeline is the other of the liquid inlet pipeline and the liquid outlet pipeline; Each of the guide wires is located between the first target pipe and the second target pipe.

2. The liquid cooling cable according to claim 1, characterized in that: The first target pipeline is the liquid inlet pipeline, and the second target pipeline is the liquid outlet pipeline.

3. The liquid cooling cable according to claim 1, characterized in that: The plurality of wires include a positive wire and a negative wire, and the positive wire and the negative wire are insulated from each other; The positive lead is in contact with the first target pipe and the second target pipe respectively; The negative electrode wire is in contact with the first target pipe and the second target pipe respectively.

4. The liquid cooling cable according to claim 3, characterized in that: The positive electrode wire and the negative electrode wire are symmetrically arranged.

5. The liquid cooling cable according to claim 3, characterized in that: The plurality of wires further include: a plurality of signal wires, each of which is located between the positive electrode wire and the negative electrode wire, and is insulated from the positive electrode wire and the negative electrode wire.

6. The liquid cooling cable according to claim 1, characterized in that: The liquid cooling cable further includes: a plurality of insulating columns, the plurality of insulating columns being distributed between the first target pipe and the second target pipe to divide the interval area between the first target pipe and the second target pipe into a plurality of distribution areas; The plurality of conductive lines are respectively arranged in the plurality of distribution areas.

7. The liquid cooling cable according to claim 6, characterized in that: The plurality of wires include: a positive wire, a negative wire and a plurality of signal wires; There are at least three insulating columns, which divide the interval area between the first target pipeline and the second target pipeline into at least three distribution areas; The positive electrode wire and the negative electrode wire are respectively arranged in the two distribution areas, and the plurality of signal lines are arranged in at least one distribution area.

8. The liquid cooling cable according to claim 6, characterized in that: At least one of the first target conduit and the second target conduit is integrally formed with the plurality of insulating pillars.

9. The liquid cooling cable according to claim 1, characterized in that: The liquid cooling cable further comprises a heat conducting layer; the heat conducting layer is arranged on the outer wall of the first target pipe, and / or the heat conducting layer is arranged on the outer wall of the second target pipe facing the first target pipe; The heat conductive layer contacts at least some of the plurality of conductive lines.

10. The liquid cooling cable according to claim 9, characterized in that: The plurality of wires include a positive electrode wire and a negative electrode wire, and the heat conductive layer is in contact with the positive electrode wire and the negative electrode wire respectively.

11. The liquid cooling cable according to claim 1, characterized in that: The cross-section of the first target pipeline is annular, and the cross-section of the second target pipeline is elliptical, circular, rectangular or annular; the cross-sectional area of ​​the liquid inlet pipeline is 0.8-1.2 times the cross-sectional area of ​​the liquid outlet pipeline.

12. The liquid cooling cable according to claim 1, characterized in that: The cross-section of the first target pipeline is annular, and the cross-section of the second target pipeline is elliptical, circular, rectangular or annular; the cross-sectional area of ​​the liquid inlet pipeline is 0.9-1.1 times the cross-sectional area of ​​the liquid outlet pipeline.

13. The liquid cooling cable according to claim 1, characterized in that: The cross-sectional areas of the liquid inlet pipe and the liquid outlet pipe are equal.

14. A charging pile, characterized in that: include: A hydraulic pump and a liquid-cooled cable according to any one of claims 1 to 13, wherein the hydraulic pump is respectively connected to the liquid inlet pipe and the liquid outlet pipe to form a circulation loop.

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