Liquid cooling cable, charging gun and charging equipment

Abstract

The embodiment of the utility model provides a liquid cooling cable, a charging gun and charging equipment, the liquid cooling cable comprises a wire and an insulating layer, the insulating layer sleeves the periphery of the wire, and the insulating layer and the wire are arranged at intervals along the radial direction of the wire. The inner circumferential surface, facing the wire, of the insulating layer comprises at least one protrusion. The at least one protrusion is used for defining a flow channel with the inner circumferential face, facing the wire, of the insulating layer and the outer circumferential face, facing the insulating layer, of the wire, and the flow channel is used for circulating cooling liquid so as to conduct liquid cooling heat dissipation on the wire. In addition, the at least one protrusion is used as a supporting structure of the wire, and the phenomenon that local heat dissipation of the wire is poor due to bending deformation of the wire can be avoided. And furthermore, the heat dissipation effect of the liquid cooling cable can be improved, the heat dissipation requirement of the charging gun during high-power charging can be met, and the charging safety is improved.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and more specifically, to a liquid cooling cable, a charging gun and a charging device. Background Art

[0002] With the acceleration of the dual-carbon strategy and the increasing popularity of electric vehicles, more and more cities are starting to build supercharging cities. This has prompted the development of charging equipment towards high-power supercharging equipment, in order to achieve "one second one kilometer" rapid energy replenishment for electric vehicles, thus pursuing the creation of a new charging experience of "a cup of coffee, full charge to go".

[0003] However, in actual applications, as the charging power delivered by the charging equipment to the electric vehicle through the charging gun continues to increase, the heat generated by the charging gun cable will also increase significantly. If this heat cannot be discharged in time, it is easy to affect the normal delivery of high power by the charging gun and reduce charging safety. Utility Model Content

[0004] The present application provides a liquid-cooled cable, a charging gun, and a charging device. By providing at least one protrusion on the inner circumference of the insulating layer toward the wire to form a flow channel, the wire can be liquid-cooled to dissipate heat while avoiding the phenomenon of poor local heat dissipation of the wire due to bending and deformation of the wire. Furthermore, the heat dissipation effect of the liquid-cooled cable can be improved, which is conducive to meeting the heat dissipation requirements of the charging gun during high-power charging and improving charging safety.

[0005] In a first aspect, a liquid cooling cable is provided, the liquid cooling cable comprising a conductor and an insulating layer, the insulating layer is sleeved on the outer circumference of the conductor, and the insulating layer and the conductor are arranged at intervals along the radial direction of the conductor. The inner circumference of the insulating layer facing the conductor comprises at least one protrusion, and the at least one protrusion is used to form a flow channel with the inner circumference of the insulating layer facing the conductor and the outer circumference of the conductor facing the insulating layer, and the flow channel is used to circulate cooling liquid.

[0006] In the embodiment of the present application, at least one protrusion disposed on the inner circumference of the insulating layer and the inner circumference of the insulating layer and the outer circumference of the wire form a flow channel for the coolant to flow, so that the coolant in the flow channel can be in direct contact with the wire, that is, the wire is immersed in the coolant, thereby performing liquid cooling on the wire. Compared with traditional heat dissipation methods such as fans and heat sinks, the liquid cooling method in which the wire is in direct contact with the coolant has a higher heat dissipation efficiency, which is conducive to improving the heat dissipation effect of the liquid-cooled cable.

[0007] In addition, when the liquid-cooled cable is bent, at least one protrusion provided on the inner circumference of the insulating layer can serve as a support structure for the wire to reduce the degree of bending and deformation of the wire toward the inner circumference of the insulating layer, thereby preventing the bent and deformed area of ​​the wire from being in close contact with the inner circumference of the insulating layer. This helps to avoid the phenomenon of poor local heat dissipation of the wire caused by the obstruction of the flow of coolant in the flow channel due to the bent and deformed area of ​​the wire being in close contact with the inner circumference of the insulating layer. Furthermore, it is helpful to further improve the heat dissipation effect of the liquid-cooled cable to meet the heat dissipation requirements of the charging gun during high-power charging and improve charging safety.

[0008] In one implementation, at least one protrusion includes a protrusion, and one protrusion is spirally wound around the inner circumference along the axial direction of the wire. Based on such a design, the protrusion can form a spiral flow channel with the inner circumference of the insulating layer and the outer circumference of the wire, so that the coolant in the flow channel flows in a spiral shape. This can make the coolant contact with the wire evenly, thereby avoiding film boiling of the coolant, which is conducive to making the liquid cooling heat dissipation of the wire by the coolant more uniform. In turn, it is conducive to further improving the heat dissipation effect of the liquid-cooled cable.

[0009] In one implementation, the pitch of a protrusion is greater than the width of a protrusion along the axial direction of the wire. That is, along the axial direction of the wire, the width of the flow channel surrounded by the protrusion is greater than the width of the protrusion. Based on such a design, the coolant flowing through the flow channel can have a larger contact area with the outer peripheral surface of the wire, thereby further improving the heat dissipation effect of the liquid-cooled cable.

[0010] In one implementation, at least one protrusion includes multiple protrusions, and the multiple protrusions are arranged at intervals along the circumference of the wire, and the extension direction of each protrusion is parallel to the axial direction of the wire, or the extension direction of each protrusion has an angle with the axial direction of the wire, and the angle is greater than 0° and less than 90°.

[0011] Based on the above design, multiple protrusions can be formed between the inner circumference of the insulating layer and the outer circumference of the wire to form multiple linear flow channels. On the one hand, the coolant in the flow channel is in direct contact with the wire and liquid-cools the wire to dissipate heat, and the heat dissipation efficiency is relatively high. On the other hand, when the liquid-cooled cable is bent, the multiple protrusions can serve as a supporting structure for the wire to reduce the degree of bending and deformation of the wire toward the inner circumference of the insulating layer. This helps to avoid the phenomenon of poor local heat dissipation of the wire due to the obstruction of the flow of coolant in the flow channel caused by the bending and deformation area of ​​the wire being close to the inner circumference of the insulating layer. Thereby, the heat dissipation effect of the liquid-cooled cable is improved. In addition, since the multiple protrusions extend in a straight line, the structure is simple, which facilitates the integrated processing design of multiple protrusions and the insulating layer.

[0012] In one implementation, the interval between each adjacent two protrusions of the plurality of protrusions along the circumference of the wire is greater than the length of each protrusion along the axial direction of the wire. In other words, along the circumference of the wire, the length of the flow channel formed by the protrusions is greater than the length of the protrusions. Based on such a design, the coolant flowing through the flow channel can have a larger contact area with the outer peripheral surface of the wire, thereby further improving the heat dissipation effect of the liquid-cooled cable.

[0013] In one implementation, the number of the plurality of protrusions is greater than or equal to 2 and less than or equal to 4.

[0014] In the embodiment of the present application, by setting the number of protrusions in the range of 2 to 4, on the one hand, compared with the inner circumference of the insulating layer including only one protrusion, by setting multiple protrusions together as the support structure of the wire, it is helpful to ensure that the bending and deformation area of ​​the wire is prevented from being close to the inner circumference of the insulating layer. On the other hand, this is also helpful to avoid the situation where the contact area between the coolant in the flow channel and the outer circumference of the wire is reduced due to the setting of too many protrusions, thereby resulting in a deterioration in the heat dissipation effect of the liquid-cooled cable, and it is also helpful to avoid the cost increase caused by the setting of too many protrusions. In turn, the heat dissipation effect of the liquid-cooled cable is improved, and the cost optimization of the liquid-cooled cable is facilitated.

[0015] In one implementation, the liquid-cooled cable satisfies at least one of the following: the radial spacing between the insulating layer and the conductor along the conductor is greater than or equal to 0.5 mm and less than or equal to 6 mm; the distance between the end face of each protrusion facing the conductor in the radial direction of the conductor and the outer peripheral surface of the conductor facing the insulating layer is greater than or equal to 0 mm and less than or equal to 2 mm.

[0016] In the embodiment of the present application, by setting the interval between the insulating layer and the wire in the range of 0.5mm to 6mm, it is not only conducive to ensuring that the flow rate of the coolant flowing through the flow channel meets the heat dissipation requirements of the wire, but also conducive to avoiding the cost increase caused by the excessive radial size of the liquid-cooled cable. In addition, by setting an assembly error within a range of 2mm between the protrusion and the wire, it is not only convenient to assemble the wire and the insulating layer, but also conducive to alleviating the problem that the coolant flows through the space where the assembly error is located and affects the heat dissipation effect of the liquid-cooled cable.

[0017] In a second aspect, a charging gun is provided, which includes a charging gun head and a liquid cooling cable as described in any one of the first aspects above, wherein the charging gun head is used to connect to a charging socket of an electric vehicle, one end of the liquid cooling cable is connected to the charging gun head, and the other end of the liquid cooling cable is used to connect to a charging module.

[0018] In a third aspect, a charging device is provided, which includes a charging module and a charging gun as described in the second aspect above, wherein the charging module is used to transmit electric energy to the electric vehicle through the charging gun.

[0019] For the beneficial effects of the second and third aspects that are not detailed, please refer to the beneficial effects of the first aspect mentioned above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a charging system provided in an embodiment of the present application.

[0021] Figure 2 It is a structural schematic diagram of a liquid cooling cable provided in an embodiment of the present application.

[0022] Figure 3 yes Figure 2 A schematic cross-sectional view of a liquid cooling cable is shown.

[0023] Figure 4 yes Figure 2 Schematic diagram of the structure of the insulation layer in the liquid-cooled cable shown.

[0024] Figure 5 This is a schematic diagram of the structure of the insulation layer in another example of a liquid-cooled cable provided in an embodiment of the present application.

[0025] Figure 6 This is a schematic diagram of the structure of another liquid cooling cable provided in an embodiment of the present application.

[0026] Figure 7 yes Figure 6 Schematic diagram of a cross section through a liquid-cooled cable is shown. DETAILED DESCRIPTION

[0027] To facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0028] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" in the embodiments of the present application are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0029] The "perpendicular" mentioned in this application is not perpendicular in the strict sense, but within the allowable error range. The "parallel" is not parallel in the strict sense, but within the allowable error range.

[0030] In the embodiments of the present application, the same reference numerals represent the same component or the same part. In the embodiments of the present application, for multiple identical parts, only one of the parts may be marked with a reference numeral in the drawings as an example. For other identical parts or components, the reference numerals are also applicable. In addition, the sizes and dimensions of the parts shown in the drawings are only exemplary.

[0031] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0032] First, to facilitate understanding of the technical solutions provided by the embodiments of the present application, application scenarios applicable to the embodiments of the present application are first introduced.

[0033] Figure 1 It is a structural schematic diagram of a charging system 10 provided in an embodiment of the present application.

[0034] Combination Figure 1 In (a) and (b), the charging system 10 includes a charging device 11 and an electric vehicle 12. The charging device 11 is used to receive the AC power output by the power grid 20, and convert the AC power into stable DC power and then transmit it to the electric vehicle 12 to charge the electric vehicle 12. Alternatively, in some other embodiments, the electric vehicle 12 can also output electric energy to the power grid 20 through the charging device 11.

[0035] In some embodiments, such as Figure 1 As shown in (a) of FIG. 1 , the charging device 11 is a split type charging device. Specifically, the charging device 11 includes a charging host 111 , a charging terminal 112 and a charging gun 113 .

[0036] The charging host 111 includes a box and a plurality of charging modules contained in the box, and the plurality of charging modules are connected to a charging terminal 112. The charging terminal 112 is connected to a charging gun 113, and the charging gun 113 is used to connect to the electric vehicle 12. In a specific implementation, the plurality of charging modules are used to convert the AC power output by the power grid 20 into stable DC power and then transmit it to the charging terminal 112, and the charging terminal 112 outputs the received DC power to the electric vehicle 12 through the connected charging gun 113, thereby charging the electric vehicle 12.

[0037] For example, the number of the charging terminal 112 and the number of the charging gun 113 in the charging device 11 can be one or more. In a specific implementation, one charging terminal 112 is connected to one or more charging guns 113, and one or more charging guns 113 are connected to the same electric vehicle 12.

[0038] The charging terminal 112 includes a housing, a human-machine interaction interface, a charging control unit, a metering and billing unit, etc., and is used for information exchange, energy transmission, metering and billing, etc. with the electric vehicle 12.

[0039] The electric vehicle 12 is a vehicle that is driven by electric energy and is a pure electric vehicle (pure EV / battery EV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), or a plug-in hybrid electric vehicle (PHEV).

[0040] In some other embodiments, as shown in (b) of FIG. (1), the charging device 11 is an integrated charging device. Specifically, the human-machine interface, charging control unit, metering and billing unit, etc. in the charging device 11 are directly arranged in the charging host 111, so that the charging device 11 only includes the charging host 111 and the charging gun 113 connected to the charging host 111, but does not include the charging terminal 112. In a specific implementation, the multiple charging modules in the charging host 111 convert the AC power output by the power grid 20 into stable DC power, and then directly transmit it to the electric vehicle 12 through the charging gun 113.

[0041] Further, see Figure 1 In (b), the charging gun 113 includes a charging gun head 1131 and a cable 1132, the charging gun head 1131 is used to connect to the charging socket of the electric vehicle 12, one end of the cable 1132 is connected to the charging gun head 1131, and the other end of the cable 1132 is connected to the charging module in the charging device 11. For example, in Figure 1 In the example shown in (b) of FIG. 1 , the housing of the charging host 111 includes a charging interface, and the other end of the cable 1132 is connected to the charging module in the housing through the charging interface. Figure 1 In the example shown in (a), the other end of the cable 1132 is connected to the box of the charging terminal 112, thereby connecting to the charging module in the charging host 111 through the charging terminal 112.

[0042] As described in the above background technology section, as the charging device 11 continues to evolve into a supercharging charging device, the charging power delivered by the charging device 11 to the electric vehicle 12 through the charging gun 113 continues to increase, and the heat generated by the cable 1132 also increases significantly, resulting in an increase in the overall heat consumption of the charging gun 113. However, some traditional heat dissipation methods, such as air cooling through fans, heat sinks, etc., have very limited effects and can no longer meet the heat dissipation requirements of the cable 1132.

[0043] Based on the above content, the embodiments of the present application provide a liquid-cooled cable, a charging gun, and a charging device. By providing at least one protrusion on the inner circumference of the insulating layer toward the wire to form a flow channel, the wire can be liquid-cooled to dissipate heat while avoiding the phenomenon of poor local heat dissipation of the wire due to bending and deformation of the wire. Furthermore, the heat dissipation effect of the liquid-cooled cable can be improved, which is conducive to meeting the heat dissipation requirements of the charging gun during high-power charging and improving charging safety.

[0044] The liquid cooling cable provided in the embodiment of the present application is first introduced below with reference to the accompanying drawings.

[0045] Figure 2 It is a schematic diagram of the structure of a liquid cooling cable 300 provided in an embodiment of the present application. Figure 3 yes Figure 2 FIG. 3 is a schematic radial cross-sectional view of a liquid-cooling cable 300 .

[0046] Combination Figure 2 and Figure 3 The liquid cooling cable 300 includes a conductor 310 and an insulating layer 320. The insulating layer 320 is sleeved on the outer periphery of the conductor 310 and is used to insulate and protect the conductor 310. The conductor 310 is, for example, a copper conductor formed by twisting a plurality of single-core conductors.

[0047] In addition, the insulating layer 320 and the conductive wire 310 are spaced apart in the radial direction of the conductive wire 310 , and the inner circumferential surface 321 of the insulating layer 320 facing the conductive wire 310 includes at least one protrusion 322 , for example Figure 2 and Figure 3 The inner circumference 321 of the insulating layer 320 is exemplarily shown to include a protrusion, namely, a protrusion 322a. The at least one protrusion 322, the inner circumference 321 of the insulating layer 320 facing the wire 310, and the outer circumference 311 of the wire 310 facing the insulating layer 320 form a flow channel M for circulating the coolant. In other words, the shape of the flow channel M is defined in the interval between the insulating layer 320 and the wire 310 by the at least one protrusion 322.

[0048] In this way, when the coolant is injected into the flow channel M and driven to flow in the flow channel M, the outer peripheral surface 311 of the wire 310 can directly contact the coolant in the flow channel M and transfer the generated heat to the coolant. As the coolant continues to flow in the flow channel M, the heat generated by the wire 310 is taken away, thereby achieving liquid cooling and heat dissipation of the wire 310.

[0049] Exemplarily, the coolant may be an insulating coolant such as electronic fluorinated liquid, silicone oil, or the like.

[0050] In the embodiment of the present application, at least one protrusion 322 disposed on the inner circumference 321 of the insulating layer 320, the inner circumference 321 of the insulating layer 320, and the outer circumference 311 of the wire 310 form a flow channel M for the coolant to flow, so that the coolant flowing through the flow channel M can be in direct contact with the wire 310, that is, the wire 310 is immersed in the coolant, thereby liquid cooling the wire 310. Compared with traditional heat dissipation methods such as fans and heat sinks, the liquid cooling heat dissipation method in which the wire 310 is in direct contact with the coolant has a higher heat dissipation efficiency, which is conducive to improving the heat dissipation effect of the liquid-cooled cable 300.

[0051] It should be understood that in some embodiments, by winding a winding body, such as a copper wire, around the outer circumference 311 of the wire 310, although a flow channel can be formed in the gap between the wire 310 and the insulating layer 320, when the coolant flows in the flow channel, the flow of the coolant may drive the winding body to move together, resulting in poor structural stability of the flow channel. Furthermore, when the wire 310 bends toward the insulating layer 320, the coolant may drive the winding body in the bending area of ​​the wire 310 to move, and the bending area of ​​the wire 310 may be close to the inner circumference 321 of the insulating layer 320. This hinders the flow of the coolant in the flow channel between the wire 310 and the insulating layer 320, resulting in poor heat dissipation in the local area where the wire 310 and the insulating layer 320 are in contact.

[0052] In the embodiment of the present application, since at least one protrusion 322 is formed by the inner circumference 321 of the insulating layer 320 protruding toward the wire 310, that is, at least one protrusion 322 is fixed to the inner circumference 321 of the insulating layer 320, the flow of the coolant will not drive the at least one protrusion 322 to move, and the flow channel M formed by the at least one protrusion 322 between the wire 310 and the insulating layer 320 has good structural stability. Therefore, when the liquid-cooled cable 300 is bent, the at least one protrusion 322 fixed to the insulating layer 320 can serve as a support structure for the wire 310, improve the bending resistance of the wire 310, and reduce the degree of bending and deformation of the wire 310 toward the insulating layer 320, thereby preventing the bending and deformation area of ​​the wire 310 from being closely attached to the inner circumference 321 of the insulating layer 320. This is conducive to avoiding the phenomenon of poor local heat dissipation of the wire 310 caused by the blocking of the flow of coolant in the flow channel M due to the bending and deformation area of ​​the wire 310 being closely attached to the inner circumference 321 of the insulating layer 320. Furthermore, it is beneficial to further improve the heat dissipation effect of the liquid-cooled cable 300 to meet the heat dissipation requirements of the charging gun during high-power charging and improve charging safety.

[0053] The specific structure of the flow channel M formed by the at least one protrusion 322 mentioned above, the inner circumferential surface 321 of the insulating layer 320, and the outer circumferential surface 311 of the conductive wire 310 will be described below by way of example.

[0054] Figure 4 This is an example provided in the embodiment of the present application. Figure 2 and Figure 3 A schematic structural diagram of the insulating layer 320 is shown.

[0055] See also Figure 4 In some embodiments, taking the inner circumferential surface 321 of the insulating layer 320 including only one protrusion 322, namely, including the protrusion 322a as an example, along the axial direction of the wire 310, namely, along Figure 4 In the length direction of the wire 310 shown, the protrusion 322a is spirally wound around the inner circumference 321 of the insulating layer 320, thereby forming a plurality of winding portions arranged along the axial direction of the wire 310, such as a winding portion 322a1, a winding portion 322a2 and a winding portion 322a3.

[0056] In this way, the interval between each two adjacent winding parts in the protrusion 322a can be used as a part of the flow channel, for example, the interval between the adjacent winding part 322a1 and the winding part 322a2, and the interval between the adjacent winding part 322a2 and the winding part 322a3 can all be used as a part of the flow channel, so that the protrusion 322a and the inner circumference 321 of the insulating layer 320, and the outer circumference 311 of the wire 310 form a flow channel M extending in a spiral shape along the axial direction of the wire 310. When the coolant is injected into the flow channel M, the coolant can flow through the outer circumference 311 of the wire 310 along the spiral flow channel M to perform liquid cooling on the wire 310. The flow direction of the coolant can be as follows: Figure 4 As shown by the dotted arrow in .

[0057] In the embodiment of the present application, by spirally winding the protrusion 322a around the inner circumference 321 of the insulating layer 320 along the axial direction of the wire 310, the protrusion 322a, the inner circumference 321 of the insulating layer 320, and the outer circumference 311 of the wire 310 can form a spiral flow channel M. Since the protrusion 322a extends along the axial direction of the wire 310, when the liquid-cooling cable 300 is bent, the protrusion 322a can serve as a support structure of the wire 310 to support the entire wire 310, reduce the degree of bending and deformation of the wire 310 toward the insulating layer 320, and prevent the bending and deformation area of ​​the wire 310 from being closely attached to the inner circumference 321 of the insulating layer 320. This is conducive to avoiding the phenomenon of poor local heat dissipation of the wire 310 caused by the bending and deformation area of ​​the wire 310 being closely attached to the inner circumference 321 of the insulating layer 320, which causes the flow of the coolant in the flow channel M to be blocked.

[0058] In addition, since the flow channel M is a spiral structure, the coolant in the flow channel M can contact the wire 310 more evenly, thereby avoiding film boiling of the coolant, so that the coolant can dissipate the liquid heat of the wire 310 more evenly. In addition, it is beneficial to further improve the heat dissipation effect of the liquid-cooled cable 300. And in actual application, by adjusting the interval between each two adjacent winding parts in the protrusion 322a, the flow rate of the coolant in the flow channel M and the structural strength of the protrusion 322a as a supporting structure can be flexibly adjusted, thereby meeting the application requirements of the liquid-cooled cable 300 in different scenarios. For example, when the flow rate of the coolant is the same, when the interval between each two adjacent winding parts in the protrusion 322a is reduced, that is, the protrusion 322a is wound more closely on the inner circumference 321 of the insulating layer 320, the flow rate of the coolant in the flow channel M is reduced, but the structural strength of the protrusion 322a as a supporting structure is improved, thereby better improving the anti-bending performance of the wire 310.

[0059] Continue reading Figure 4 In some embodiments, the pitch of the protrusion 322 a is greater than the width W1 of the protrusion 322 a along the axial direction of the wire 310 .

[0060] It should be understood that in the embodiment of the present application, the pitch of the protrusion 322a can be understood as the interval between any two adjacent winding portions of the protrusion 322a along the axial direction of the wire 310. Figure 4 As shown, along the axial direction of the wire 310, the interval L1 between the winding portion 322a1 and the winding portion 322a2, and the interval L2 between the winding portion 322a2 and the winding portion 322a3 are both the pitch of the protrusion 322a. Among them, L1>W1, L2>W1. That is, along the axial direction of the wire 310, the width of the flow channel M formed by the protrusion 330a is greater than the width of the protrusion 330a.

[0061] Based on the above design, the coolant flowing through the flow channel M can have a larger contact area with the outer peripheral surface 311 of the wire 310 , thereby further improving the heat dissipation effect of the liquid-cooled cable 300 .

[0062] Furthermore, in one example, along the axial direction of the wire 310, the intervals between any two adjacent winding portions of the protrusion 322a are equal. That is, along the axial direction of the wire 310, the protrusion 322a is arranged on the inner circumference 321 of the insulating layer 320 in a spiral shape with equal pitch. That is, L1=L2>W1. This helps to reduce the design complexity of the protrusion 322a and facilitates the integrated processing of the insulating layer 320 and the protrusion 322a.

[0063] In some embodiments, in combination Figure 3 and Figure 4To facilitate the assembly between the conductor 310 and the insulating layer 320, the liquid cooling cable 300 also satisfies at least one of the following:

[0064] Along the radial direction of the wire 310 , the interval d1 between the insulating layer 320 and the wire 310 is greater than or equal to 0.5 mm and less than or equal to 6 mm;

[0065] Along the radial direction of the wire 310 , a distance d2 between the end surface of the protrusion 322 a facing the wire 310 and the outer peripheral surface 311 of the wire 310 is greater than or equal to 0 mm and less than or equal to 2 mm.

[0066] It should be understood that when d1 is less than 0.5 mm, that is, the interval between the insulating layer 320 and the wire 310 is small, the depth of the flow channel M formed by the protrusion 322a in the interval between the insulating layer 320 and the wire 310 is shallow. This results in a small flow rate of the coolant that can flow through the flow channel M, which may not meet the heat dissipation requirements of the wire 310. When d1 is greater than 6 mm, that is, the interval between the insulating layer 320 and the wire 310 is large, the overall radial dimension of the liquid-cooled cable 300 is large, thereby increasing the cost of the liquid-cooled cable 300.

[0067] Therefore, in the embodiment of the present application, by setting the interval d1 between the insulating layer 320 and the wire 310 within the range of 0.5 mm to 6 mm, it is beneficial to ensure that the flow rate of the coolant flowing through the flow channel M meets the heat dissipation requirements of the wire 310, and it is also beneficial to avoid the cost increase caused by the excessive radial size of the entire liquid-cooled cable 300.

[0068] It should also be understood that in actual application, in order to facilitate the assembly of the wire 310 inside the insulating layer 320, an assembly error d2 is generally set between the end surface of the protrusion 322a facing the wire 310 and the outer peripheral surface 311 of the wire 310. In addition, since the flow channel M is surrounded by the outer peripheral surface 311 of the wire 310, the inner peripheral surface 321 of the insulating layer 320, and the protrusion 322a, when the assembly error d2 between the protrusion 322a and the outer peripheral surface 311 of the wire 310 is large, part of the coolant in the flow channel M may not flow according to the flow channel shape defined by the protrusion 322a, but directly flow through the space where the assembly error is located, thereby affecting the heat dissipation effect of the liquid-cooled cable 300.

[0069] Therefore, in the embodiment of the present application, by setting the distance d2 between the end face of the protrusion 322a facing the wire 310 and the outer peripheral surface 311 of the wire 310 between 0mm and 2mm, that is, setting an assembly error within a range of 2mm between the protrusion 322a and the wire 310, it is not only convenient for assembling the wire 310 and the insulating layer 320, but also helps to alleviate the problem of the coolant flowing through the space where the assembly error is located and affecting the heat dissipation effect of the liquid-cooled cable 300.

[0070] It should be understood that the inner circumference 321 of the insulating layer 320 includes a spirally extending protrusion 322a for illustration only. In some other embodiments, the inner circumference 321 of the insulating layer 320 may also include a plurality of parallel spirally extending protrusions 322.

[0071] For example, see Figure 5 , Figure 5 FIG. 3 is a schematic diagram of another structure of an insulating layer 320 provided in an embodiment of the present application. Figures 2 to 4 The embodiment shown is different in that Figure 5 In the illustrated embodiment, the inner circumferential surface 321 of the insulating layer 320 includes two protrusions 322 , namely, a protrusion 322 a and a protrusion 322 b .

[0072] In the axial direction of the wire 310, the protrusions 322a and 322b are arranged in parallel spirals around the inner circumference 321 of the insulating layer 320. Thus, the protrusions 322a, 322b, the inner circumference 321 of the insulating layer 320, and the outer circumference 311 of the wire 310 can also enclose a flow channel M extending in a spiral shape along the axial direction of the wire 310.

[0073] Specifically, when the protrusion 322a and the protrusion 322b are spirally wound in parallel on the inner circumference 321 of the insulating layer 320, the protrusion 322a and the protrusion 322b each form a plurality of winding portions arranged along the axial direction of the conductor 310, and along the axial direction of the conductor 310, the winding portions of the protrusion 322a and the protrusion 322b are alternately arranged.

[0074] For example, Figure 5 As shown, along the axial direction of the wire 310, the winding portion 322a1 and the winding portion 322a2 of the protrusion 322a, and the winding portion 322b1 and the winding portion 322b2 of the protrusion 322b are sequentially arranged along the axial direction of the wire 310 in the order of winding portions 322a1, 322b1, 322a2, 322b2. By using the interval between the winding portion 322a1 and the winding portion 322b1, the interval between the winding portion 322b1 and the winding portion 322a2, and the interval between the winding portion 322a2 and the winding portion 322b2 as a part of the flow channel, a flow channel M extending in a spiral shape can be defined in the interval between the insulating layer 320 and the wire 310.

[0075] In the embodiment of the present application, a plurality of protrusions 322 extending in a parallel spiral shape can also be used to form a spiral flow channel M with the inner circumference 321 of the insulating layer 320 and the outer circumference 311 of the wire 310. On the one hand, the spiral flow channel M can evenly liquid-cool the wire 310, thereby improving the heat dissipation effect of the liquid-cooled cable 300. On the other hand, the plurality of protrusions 322 can serve as a support structure for the wire 310, thereby better reducing the degree of bending and deformation of the wire 310 toward the insulating layer 320, so as to prevent the bending and deformation area of ​​the wire 310 from being closely attached to the inner circumference 321 of the insulating layer 320. Furthermore, when the liquid-cooled cable 300 is bent, the phenomenon of poor local heat dissipation of the wire 310 can be better avoided, thereby improving the heat dissipation effect of the liquid-cooled cable 300.

[0076] Continue to combine Figure 5 In some embodiments, along the axial direction of the wire 310, the interval between the protrusion 322a and the protrusion 322b is greater than the width W1 of the protrusion 322a and the width W2 of the protrusion 322b.

[0077] It should be understood that the interval between the protrusion 322 a and the protrusion 322 b along the axial direction of the wire 310 can be understood as the interval between two adjacent winding portions of the protrusion 322 a and the protrusion 322 b along the axial direction of the wire 310 .

[0078] For example, the interval between the protrusion 322a and the protrusion 322b along the axial direction of the wire 310 may refer to the interval L3 between the winding portion 322a1 and the winding portion 322b1, the interval L4 between the winding portion 322b1 and the winding portion 322a2, or the interval L5 between the winding portion 322a2 and the winding portion 322b2 along the axial direction of the wire 310. Among them, L3>W1 and L3>W2, L4>W1 and L4>W2, L5>W1 and L5>W2. That is, along the axial direction of the wire 310, the width of the flow channel M formed by the protrusion 330a and the protrusion 330b is greater than the width of the protrusion 330a and the protrusion 330b.

[0079] Based on the above design, the coolant flowing through the flow channel M formed by the protrusions 322 a and 322 b can have a larger contact area with the outer peripheral surface 311 of the wire 310 , thereby further improving the heat dissipation effect of the liquid-cooled cable 300 .

[0080] Furthermore, in one example, along the axial direction of the wire 310, the intervals between any two adjacent winding portions of the protrusion 322a and the protrusion 322b are equal, and the width W1 of the protrusion 322a and the width W2 of the protrusion 322b are equal. That is, along the axial direction of the wire 310, the protrusion 322a and the protrusion 322b are arranged in parallel and equal-pitch spirals on the inner circumference 321 of the insulating layer 320. That is, L3=L4=L5>W1=W2.

[0081] Based on the above design, it is beneficial to the regular design of the protrusions 322a and 322b, thereby reducing the design complexity of the protrusions 322a and 322b, and facilitating the integrated processing of the insulating layer 320 and the protrusions 322a and 322b.

[0082] It should be understood that the details of the protrusions 322a and 322b described above may be found in Figure 3 and Figure 4 The relevant description of the illustrated embodiment will not be repeated here.

[0083] Figure 6 It is a structural schematic diagram of another liquid cooling cable 300 provided in an embodiment of the present application. Figure 7 yes Figure 6 A schematic diagram of the radial structure of a liquid-cooling cable 300 is shown.

[0084] Combination Figure 6 and Figure 7 In some embodiments, the inner circumferential surface 321 of the insulating layer 320 includes a plurality of protrusions 322. The plurality of protrusions 322 are arranged at intervals along the circumference of the wire 310, and the extension direction of each protrusion 322 is parallel to the axial direction of the wire 310, or the extension direction of each protrusion 322 has an angle with the axial direction of the wire 310. The angle is greater than 0° and less than 90°.

[0085] That is, each protrusion 322 extends in a straight line along the length direction of the wire 310, or each protrusion 322 extends in a straight line along a direction intersecting the length direction of the wire 310. Figure 6 and Figure 7 It is exemplarily shown that the extending direction of each protrusion 322 is parallel to the axial direction of the wire 310 .

[0086] Based on the above design, the interval between each two adjacent protrusions 322 between the insulating layer 320 and the conductive wire 310 can serve as a flow channel M, that is, each two adjacent protrusions 322 can form a flow channel M with the inner circumference 321 of the insulating layer 320 and the outer circumference 311 of the conductive wire 310. Furthermore, multiple protrusions 322 can form multiple flow channels M with the inner circumference 321 of the insulating layer 320 and the outer circumference 311 of the conductive wire 310.

[0087] For example, Figure 6 and Figure 7 As shown, the inner circumferential surface 321 of the insulating layer 320 includes four protrusions 322, namely, protrusions 322a, 322b, 322c and 322d, for example. The protrusions 322a, 322b, 322c and 322d are arranged at intervals along the circumferential direction of the wire 310, and all extend along the axial direction of the wire 310. Thus, the protrusions 322a and 322b, the protrusions 322b and 322c, the protrusions 322c and 322d, and the protrusions 322d and 322a can respectively form a flow channel M with the inner circumferential surface 321 of the insulating layer 320 and the outer circumferential surface 311 of the wire 310, and form a flow channel M extending along the axial direction of the wire 310. That is, the four protrusions 322 , the inner circumferential surface 321 of the insulating layer 320 , and the outer circumferential surface 311 of the conductive wire 310 together form four flow channels M.

[0088] In the embodiment of the present application, by extending the plurality of protrusions 322 along the axial direction of the wire 310 or along the direction intersecting the axial direction of the wire 310, the plurality of protrusions 322 and the inner circumferential surface 321 of the insulating layer 320 and the outer circumferential surface 311 of the wire 310 can form a plurality of linear flow channels M. In this way, when the coolant flows through each flow channel M, the coolant can directly contact the outer circumferential surface 311 of the wire 310 and perform liquid cooling and heat dissipation on the wire 310, and the heat dissipation efficiency is high. In addition, when the liquid-cooled cable 300 is bent, the plurality of protrusions 322 can serve together as a support structure of the wire 310 to reduce the degree of bending deformation of the wire 310 to the inner circumferential surface 321 of the insulating layer 320. This is conducive to avoiding the phenomenon of poor local heat dissipation of the wire 310 caused by the obstruction of the flow of the coolant in the flow channel M due to the bending deformation area of ​​the wire 310 being close to the inner circumferential surface 321 of the insulating layer 320. In addition, the heat dissipation effect of the liquid-cooled cable 300 is improved. In addition, since the plurality of protrusions 322 extend in a straight line, the structure is simple, and the integrated processing design of the plurality of protrusions 322 and the insulating layer 320 is facilitated.

[0089] Continue to combine Figure 6 and Figure 7 In some embodiments, the number of the plurality of protrusions 322 is greater than or equal to 2 and less than or equal to 4. That is, the inner circumferential surface 321 of the insulating layer 320 may include 2, 3 or 4 protrusions 322 .

[0090] It should be understood that when the inner circumference 321 of the insulating layer 320 includes only one protrusion 322 extending in an axial direction parallel to the wire 310, the structural strength of the one protrusion 322 as a supporting structure is limited. When the liquid-cooled cable 300 is bent, it may not be possible to well prevent the bending deformation area of ​​the wire 310 from being closely attached to the inner circumference 321 of the insulating layer 320. When the number of protrusions 322 included in the inner circumference 321 of the insulating layer 320 is greater than 4, the contact area between the multiple protrusions 322 and the outer circumference 311 of the wire 310 is large, resulting in a small contact area between the flow channel M formed between the multiple protrusions 322 and the outer circumference 311 of the wire 310, thereby affecting the heat dissipation effect of the coolant on the wire 310. In addition, setting too many protrusions 322 is also likely to increase the cost of the liquid-cooled cable 300.

[0091] Therefore, in the embodiment of the present application, by setting the number of protrusions 322 in the range of 2 to 4, on the one hand, compared with the inner circumference 321 of the insulating layer 320 including one protrusion 322, by setting multiple protrusions 322 together as the support structure of the wire 310, it is helpful to ensure that the bending deformation area of ​​the wire 310 is prevented from being close to the inner circumference 321 of the insulating layer 320. On the other hand, this is also helpful to avoid the situation where the contact area between the coolant in the flow channel M and the outer circumference 311 of the wire 310 is reduced due to the setting of too many protrusions 322, thereby causing the heat dissipation effect of the liquid-cooled cable 300 to deteriorate, and it is also helpful to avoid the cost increase caused by setting too many protrusions 322. In turn, the heat dissipation effect of the liquid-cooled cable 300 is improved, and the cost optimization of the liquid-cooled cable 300 is beneficial.

[0092] Continue to combine Figure 7 In some embodiments, the interval between each adjacent two protrusions 322 of the plurality of protrusions 322 along the circumference of the wire 310 is greater than the length of each protrusion 322 along the circumference of the wire 310. For example, the interval S1 between the protrusion 322a and the protrusion 322b along the circumference of the wire 310 is greater than the length Sa of the protrusion 322a along the circumference of the wire 310, and greater than the length Sb of the protrusion 322b along the circumference of the wire 310. That is, S1>Sa, and S1>Sb.

[0093] Based on the above design, the coolant flowing through the flow channel M formed by the plurality of protrusions 322 can have a larger contact area with the outer peripheral surface 311 of the wire 310 , thereby further improving the heat dissipation effect of the liquid-cooled cable 300 .

[0094] Furthermore, in one example, the intervals between each two adjacent protrusions 322 in the circumferential direction of the wire 310 are equal, and the lengths of each protrusion 322 in the circumferential direction of the wire 310 are equal. In other words, the protrusions 322 in the circumferential direction of the wire 310 are arranged at equal intervals.

[0095] Based on the above design, it is beneficial to the regular design of the plurality of protrusions 322 , reduce the design complexity of the plurality of protrusions 322 , and thus facilitate the integrated processing of the insulating layer 320 and the plurality of protrusions 322 .

[0096] The embodiment of the present application also provides a charging gun, which includes a charging gun head and the liquid cooling cable 300 described above. The charging gun head is used to connect to the charging socket of the electric vehicle, one end of the liquid cooling cable 300 is connected to the charging gun head, and the other end of the liquid cooling cable 300 is connected to the charging module. In a specific implementation, one end of the wire 310 in the liquid cooling cable 300 is connected to the charging gun head, and the other end of the wire 310 is connected to the charging module to transmit the power output by the charging module to the electric vehicle connected to the charging gun head. For a detailed description of the charging gun, please refer to Figure 1 The embodiments shown will not be described in detail here.

[0097] The present application also provides a charging device, which includes a charging module and the charging gun described above, and the charging module is used to transmit electric energy to the electric vehicle through the charging gun. For a detailed description of the charging device, please refer to Figure 1 The embodiments shown will not be described in detail here.

[0098] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A liquid cooling cable, characterized in that: The liquid cooling cable comprises a conductor and an insulating layer, wherein the insulating layer is sleeved on the outer circumference of the conductor, and the insulating layer and the conductor are spaced apart in the radial direction of the conductor, wherein: The inner circumference of the insulating layer facing the wire includes at least one protrusion, and the at least one protrusion is used to form a flow channel with the inner circumference of the insulating layer facing the wire and the outer circumference of the wire facing the insulating layer, and the flow channel is used to circulate cooling liquid.

2. The liquid cooling cable according to claim 1, characterized in that: The at least one protrusion includes one protrusion, and the one protrusion is spirally wound around the inner circumference of the insulating layer facing the conductive wire along the axial direction of the conductive wire.

3. The liquid cooling cable according to claim 2, characterized in that: A pitch of the one protrusion is greater than a width of the one protrusion along an axial direction of the wire.

4. The liquid cooling cable according to claim 1, characterized in that: The at least one protrusion includes a plurality of protrusions, and the plurality of protrusions are arranged at intervals along the circumference of the wire; The extending direction of each protrusion is parallel to the axial direction of the wire, or the extending direction of each protrusion forms an angle with the axial direction of the wire, and the angle is greater than 0° and less than 90°.

5. The liquid cooling cable according to claim 4, characterized in that: A distance between each two adjacent protrusions of the plurality of protrusions along the circumferential direction of the wire is greater than a length of each protrusion along the circumferential direction of the wire.

6. The liquid cooling cable according to claim 4 or 5, characterized in that: The number of the plurality of protrusions is greater than or equal to 2 and less than or equal to 4.

7. The liquid cooling cable according to any one of claims 1 to 5, characterized in that: The liquid cooling cable meets at least one of the following requirements: The interval between the insulating layer and the conductor along the radial direction of the conductor is greater than or equal to 0.5 mm and less than or equal to 6 mm; In the radial direction of the wire, a distance between an end surface of each protrusion facing the wire and an outer peripheral surface of the wire facing the insulating layer is greater than or equal to 0 mm and less than or equal to 2 mm.

8. A charging gun, characterized in that: The charging gun includes a charging gun head and a liquid cooling cable as described in any one of claims 1 to 7, wherein the charging gun head is used to connect to a charging socket of an electric vehicle, one end of the liquid cooling cable is connected to the charging gun head, and the other end of the liquid cooling cable is used to connect to a charging module.

9. A charging device, characterized in that: The charging device comprises a charging module and a charging gun as claimed in claim 8, wherein the charging module is used to transmit electric energy to the electric vehicle through the charging gun.

Images