Cable, charging gun and charging device

Abstract

The embodiment of the utility model provides a cable, a charging gun and a charging device, relates to the field of energy, and is used for solving the problem of heat dissipation of the cable in a high-power charging scene. The charging device comprises a charging gun head, a cable and a power conversion device. The charging gun head comprises an anode power terminal and a cathode power terminal. The cable comprises a wrapping layer, a plurality of power lines and at least one cooling pipe, a containing cavity is defined by the wrapping layer, and the power lines and the at least one cooling pipe are arranged in the containing cavity. A plurality of power lines of the cable are connected with the power conversion device, and the plurality of power lines comprise a plurality of positive power lines and a plurality of negative power lines. The plurality of positive power lines are electrically connected with the positive power terminal, and the plurality of negative power lines are electrically connected with the negative power terminal. The at least one cooling pipe is used for allowing a cooling medium to flow, each cooling pipe is in contact with at least one of the power lines, and the at least one cooling pipe is in contact with the cladding.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the energy field, in particular to a cable, a charging gun and a charging device. BACKGROUND

[0002] With the rapid development of energy technology, the market share of electric vehicles is rising, and users have higher and higher requirements for charging of cars. Among them, the charging speed is an important indicator that users pay attention to, and one of the methods to improve the charging speed is to use high-power charging technology.

[0003] But too high power will cause the cable to generate high heat, how to meet the high-power charging while effectively realizing the heat dissipation of the cable is a problem to be solved at present. CONTENT OF THE INVENTION

[0004] The embodiment of the present application provides a cable, a charging gun and a charging device, which improves the heat dissipation problem of the cable in the high-power charging scene, makes the heat dissipation effect of the cable better, and can also reduce the hardness of the cable.

[0005] To achieve the above purpose, the technical scheme adopted by the embodiment of the present application is as follows:

[0006] The first aspect of the embodiment of the present application provides a cable for a charging gun, which comprises a cladding layer, a plurality of power lines and at least one cooling pipe, the cladding layer surrounds a cavity, and the plurality of power lines and the at least one cooling pipe are arranged in the cavity. The at least one cooling pipe is used for flowing cooling medium, each cooling pipe is in contact with at least one of the plurality of power lines, and the at least one cooling pipe is in contact with the cladding layer.

[0007] The cable of the present application comprises a plurality of power lines, which can realize multi-path power line power-on, meet the large current flow capacity, and realize high-power charging. Under the same flow capacity, the hardness of the plurality of power lines is lower than that of a single power line, which can reduce the hardness of the cable and improve the user experience. During the charging process, the cable will generate high heat, and the heat mainly comes from the power lines. In order to improve the heat dissipation problem of the cable, the cable further comprises at least one cooling pipe, and the cooling pipe is used for flowing cooling medium. Each cooling pipe is in contact with at least one of the plurality of power lines. Through the contact between the cooling pipe and the power line, heat can be conducted from the power line to the cooling pipe and dissipated through the flow of the cooling medium.

[0008] In addition, the cable further comprises a cladding layer, the cladding layer is arranged to form a cavity, and the power lines and the cooling pipes are arranged in the cavity. That is, the cladding layer is wrapped around the power lines and the cooling pipes, so that the cladding layer can protect the power lines and the cooling pipes in the cable. Since the cooling pipes are in contact with the cladding layer, the cooling pipes can also reduce the temperature of the cladding layer to prevent the cladding layer from overheating. By reducing the temperature of the cladding layer, heat dissipation can also be achieved for other heat sources (for example, auxiliary source lines) in contact with the cladding layer. Thus, the charging device provided by the present application can improve the heat dissipation problem of the cable in a high-power charging scenario, so that the heat dissipation effect of the cable is better.

[0009] In an embodiment of the present application, the cooling pipes are provided in plurality, the number of the power lines is greater than the number of the cooling pipes, and the plurality of power lines are divided into a plurality of parts, each part comprising at least one power line, and the power lines in each part are in contact with the same cooling pipe.

[0010] Since the number of the power lines is greater than the number of the cooling pipes, in order to achieve heat dissipation of all the power lines, the plurality of power lines can be divided into a plurality of parts, and each part of the power lines is configured with a corresponding cooling pipe, so that more power lines can be in contact with the cooling pipes, thereby achieving better heat dissipation effect. In addition, the power lines in each part share the same cooling pipe, thereby improving the utilization rate of the cooling pipes.

[0011] In an embodiment of the present application, the cooling pipes are provided in plurality, and the plurality of cooling pipes are arranged in a circumferential direction of the cavity and in contact with the cladding layer.

[0012] The plurality of cooling pipes are arranged in the circumferential direction of the cavity, and the space between the cooling pipes can accommodate more power lines, so that more power lines can be cooled by the cooling pipes. In addition, the plurality of cooling pipes are in contact with the cladding layer, so that the cladding layer can be in contact with the corresponding cooling pipe in multiple regions in the circumferential direction of the cladding layer, thereby better helping the cladding layer to achieve uniform temperature effect.

[0013] In an embodiment of the present application, the distance between two adjacent cooling pipes in the circumferential direction of the cavity is equal.

[0014] The plurality of cooling pipes are uniformly distributed in the circumferential direction of the cavity, so that the cable can be cooled more uniformly and better.

[0015] In an embodiment of the present application, the cable further comprises an auxiliary source line, the auxiliary source line is configured to be electrically connected to an auxiliary source terminal of the charging gun, and the auxiliary source line is in contact with the cladding layer.

[0016] The auxiliary source line and the auxiliary source terminal are electrically connected, which can provide a low-voltage auxiliary power source during the charging process, and ensure the stable operation of various electronic components in the charging gun. During the charging process, the auxiliary source line also generates a certain amount of heat. By contacting the auxiliary source line with the cladding layer, a part of the heat of the auxiliary source line can be transferred to the cladding layer and conducted to the cooling pipe or air through the cladding layer. In addition, since the cladding layer is in contact with the cooling pipe, the heat of the cladding layer is low under the cooling of the cooling pipe, and the cladding layer with low temperature can also cool the auxiliary source line. Even if the auxiliary source line does not contact the cooling pipe, the cooling pipe can also indirectly cool the auxiliary source line.

[0017] In an embodiment of the present application, the cable further comprises a ground wire, the plurality of power lines are arranged around the periphery of the ground wire in the circumferential direction of the ground wire, and each cooling pipe is provided with at least one power line between the cooling pipe and the ground wire.

[0018] Since the ground wire does not generate heat, the provision of at least one power line between each cooling pipe and the ground wire can make more power lines that need to be cooled contact the cooling pipe, and the ground wire that does not need to be cooled does not contact the cooling pipe, thereby saving the contact area of the cooling pipe, enabling more power lines to contact the cooling pipe, and achieving a better cooling effect.

[0019] In an embodiment of the present application, the cladding layer comprises a fixing layer. The fixing layer is used to fix the relative positions of the plurality of power lines and the at least one cooling pipe.

[0020] The fixing layer can maintain the stability of the cable structure, reduce the risk of loosening or displacement of the plurality of power lines and the at least one cooling pipe inside the cable during use, and thus facilitate to improve the durability of the cable.

[0021] In an embodiment of the present application, the cladding layer comprises a uniform temperature layer, and the material of the uniform temperature layer comprises metal.

[0022] The material of the uniform temperature layer comprises metal material, and the metal material has good thermal conductivity. In the case that the cooling pipe contacts the cladding layer, the metal material of the uniform temperature layer can better diffuse the low temperature of the cooling pipe in the cladding layer, and also make the temperature of the cable more balanced and faster to conduct the heat from the cavity to the air.

[0023] In an embodiment of the present application, the cladding layer further comprises a protective layer, the protective layer is wrapped outside the uniform temperature layer, and the material of the protective layer comprises insulating material.

[0024] The insulating material of the protective layer can protect and isolate the uniform temperature layer, the uniform temperature layer, and the power lines, signal lines, etc. in the cavity. Due to the corrosion resistance, heat resistance, and insulation of the insulating material, the service life of the cable can be effectively prolonged, and the safety and stability of the cable can be improved.

[0025] In a second aspect, the present application provides a charging gun, which comprises a charging gun head and any one of the cables provided in the first aspect of the present application. The charging gun head comprises a positive power terminal and a negative power terminal. The plurality of power lines of the cable comprises a plurality of positive power lines and a plurality of negative power lines. The plurality of positive power lines are electrically connected to the positive power terminal, and the plurality of negative power lines are electrically connected to the negative power terminal.

[0026] The plurality of positive power lines and the plurality of negative power lines can realize multi-path power line energization, meet large current flow capacity, and realize high-power charging. The plurality of positive power lines are electrically connected to the positive power terminal, and the plurality of negative power lines are electrically connected to the negative power terminal. During the charging process of the charging device to the electric vehicle, the current is transmitted from the positive power terminal and the negative power terminal of the charging gun head to the electric vehicle through the plurality of positive power lines and the plurality of negative power lines in the cable. During the charging process, the cable generates a relatively high amount of heat, and the heat mainly comes from the power lines. The cable provided in the first aspect of the present application can improve the heat dissipation problem of the cable.

[0027] In an embodiment of the present application, the plurality of positive power lines are located on the same side of the plurality of negative power lines along the radial direction of the cavity.

[0028] In the charging gun head, the positive power terminal and the negative power terminal are located at opposite ends. Therefore, the positive power lines are concentrated on one side, and the negative power lines are concentrated on the other side. During the connection of the cable and the charging gun head, it is more convenient to realize the electrical connection of the positive power terminal and the plurality of positive power lines, and the electrical connection of the negative power terminal and the plurality of negative power lines.

[0029] In a third aspect, the present application provides a charging device, which comprises a power conversion device and any one of the charging guns provided in the second aspect of the present application. The power conversion device is used to convert alternating current into direct current, and the plurality of power lines are connected to the power conversion device.

[0030] The charging device can convert the alternating current provided by the external power grid into direct current. The alternating current output by the power grid is converted into direct current after passing through the power conversion device, and then transmitted through the positive power lines and the negative power lines, and finally output through the positive power terminal and the negative power terminal, which can better realize high-power charging. During the charging process, the cable generates a relatively high amount of heat, and the heat mainly comes from the power lines. The charging gun provided in the second aspect of the present application can improve the heat dissipation problem of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 FIG. 1 is a structural schematic diagram of a charging device provided in an embodiment of the present application;

[0032] Figure 2Another charging device structure diagram provided by the embodiment of the present application;

[0033] Figure 3 A charging gun head structure diagram provided by the embodiment of the present application;

[0034] Figure 4 A cable structure diagram in the related technology of the present application;

[0035] Figure 5 A cable structure diagram provided by the embodiment of the present application;

[0036] Figure 6 A power line structure diagram provided by the embodiment of the present application;

[0037] Figure 7 Another cable structure diagram provided by the embodiment of the present application;

[0038] Figure 8 A cladding structure diagram provided by the embodiment of the present application;

[0039] Figure 9 Another cable structure diagram provided by the embodiment of the present application.

[0040] Reference signs:

[0041] 10-charging device; 11-charging host; 12-charging terminal; 13-charging gun head; 14-cable; 15-power conversion device; 16-liquid cooling equipment; 20-external power grid; 21-electric vehicle; 31-power terminal; 311-positive power terminal; 312-negative power terminal; 32-signal terminal; 321-connection confirmation signal terminal; 322-communication signal terminal; 33-auxiliary source terminal; 331-positive auxiliary source terminal; 332-negative auxiliary source terminal; 34-ground terminal; 41-power line; 411-positive power line; 412-negative power line; 42-signal line; 43-auxiliary source line; 44-ground line; 45-cooling pipe; 451-first cooling pipe; 452-second cooling pipe; 453-third cooling pipe; 454-fourth cooling pipe; 46-cladding; 460-fixing layer; 461-first layer; 462-second layer; 463-third layer; 51-conductor; 52-insulating layer; 521-first insulating layer; 522-second insulating layer. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings.

[0043] Hereinafter, the terms "first", "second", and the like are used only for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0044] The definitions such as collinear, symmetric (for example, axisymmetric, or center symmetric, etc.), parallel, perpendicular, orthogonal, identical (for example, the same length, the same width, etc.) mentioned in the embodiments of the present application are relative to the current process level, rather than the absolute definition in the mathematical sense. Three elements are collinear, which can be understood as that the line connecting two elements or its extension has an intersection with the other element, or the nearest distance between the other element is about 2mm. There can be a predetermined angle deviation between two components that are parallel or perpendicular to each other. In some embodiments, the predetermined threshold can be less than or equal to 1mm, for example, the predetermined threshold can be 0.5mm, or can be 0.1mm. In some embodiments, the predetermined angle can be an angle within ±10°, for example, the predetermined angle deviation is ±5°.

[0045] In the present application, unless otherwise expressly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed mechanical connection, or detachable mechanical connection, or integral; or "connection" can be direct connection, or indirect connection through intermediate medium.

[0046] In the drawings of the embodiments of the present application, components are represented by arrows, and parts are represented by arrows only.

[0047] In addition, in the embodiments of the present application, the orientation terms such as "upper", "lower", etc. are defined relative to the orientation of the components shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings.

[0048] With the development of new energy automobile technology, many automobile manufacturers gradually put forward electric vehicles. Electric vehicles become the choice of many users because of their energy saving and environmental protection and relatively mature technology.

[0049] The present application can be applied to a system in which a power supply device and a load charge each other through a power distribution matrix. Especially for a system including a charging pile and an electric vehicle, the charging pile can use the electric energy from the power grid to charge the electric vehicle, and the electric vehicle can also output its own electric energy to the power grid in reverse.

[0050] Figure 1An exemplary structural schematic diagram of a charging device 10 is shown in FIG. 1. As shown in FIG. 1, the charging device 10 can be configured to receive alternating current (AC) power output by an external power grid 20 and convert the AC power into stable direct current (DC) power for delivery to an electric vehicle 21 for charging the electric vehicle 21. Figure 1

[0051] The electric vehicle 21 can be a vehicle driven by electric energy, such as a pure electric vehicle (pure EV / battery EV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or the like.

[0052] In some embodiments, as shown in FIG. 2, the charging device 10 can be a split charging pile. In this case, the charging device 10 can include a charging host 11, at least one charging terminal 12, and at least one charging gun. The charging gun can include at least one charging gun head 13 and at least one cable 14. The charging terminal 12 and the charging gun head 13 are electrically connected by the cable 14. For example, as shown in FIG. 2, a plurality of charging terminals 12 are provided, and a plurality of charging gun heads 13 and cables 14 are also provided. Each charging terminal 12 is connected to at least one charging gun head 13 by at least one cable 14. Figure 1 Figure 1

[0053] In this case, as shown in FIG. 3, the charging device 10 can include a power conversion device 15. In some examples, the power conversion device 15 can be located in a host cabinet of the charging host 11. The output of the power conversion device 15 is connected to a plurality of charging terminals 12, and the charging gun head 13 of each charging terminal 12 is configured to connect to the electric vehicle 21. Figure 1

[0054] In some examples, the power conversion device 15 can include a plurality of AC-DC modules and a plurality of DC-DC modules. In other examples, the power conversion device 15 can include a plurality of AC-DC modules without the DC-DC modules.

[0055] ​​​​In addition, in some examples, the charging terminal 12 also includes a power distribution component ( Figure 1 (Not shown in the image) This is used for circuit switching control, current detection, and overcurrent protection. For example, the power distribution assembly may include contactors, shunts, and fuses, etc., but this application does not impose specific limitations on this. The power distribution assembly is located in the terminal cabinet of the charging terminal 12. The output terminal of the power conversion device 15 is connected to the power distribution assembly of the charging terminal 12 via a cable, supplying DC power to the power distribution assembly. The power distribution assembly and the charging gun head 13 are connected via a cable 14, further supplying DC power to the charging gun head 13. The charging gun head 13 is connected to the charging interface of the electric vehicle 21, thereby enabling the DC power output from the power conversion device 15 to be supplied to the electric vehicle 21.

[0056] In addition, the charging terminal 12 may also include a housing, a human-machine interface and a metering and billing unit, and is used to exchange information and perform metering and billing with the electric vehicle 21.

[0057] Figure 2 An exemplary schematic diagram of another charging device 10 provided in an embodiment of this application is shown, such as... Figure 2 As shown, the charging device 10 is an integrated charging pile. The charging device 10 can integrate the charging gun head 13, cable 14, power conversion device 15, human-machine interface, and metering and billing unit together. In this case, such as... Figure 2 As shown, the multiple power conversion devices 15 in the cabinet of the charging device 10 can convert the AC power from the external power grid 20 into stable DC power, and then directly transmit it to the electric vehicle 21 through the cable 14 and the charging gun head 13.

[0058] As users demand higher charging speeds, the charging device 10 is constantly evolving into a supercharging charging device. The power conversion device 15 in the charging device 10 outputs more power to the electric vehicle 21 through the cable 14 and the charging gun 13, so as to be able to supercharge the power battery of the electric vehicle 21.

[0059] In order to achieve high-power charging, Figure 3 An exemplary schematic diagram of the structure of a charging gun head 13 provided in an embodiment of this application is shown, such as... Figure 3 As shown, the charging gun head 13 includes a power terminal 31, a signal terminal 32, an auxiliary power terminal 33, and a ground terminal 34.

[0060] The power terminal 31 can include a positive power terminal 311 and a negative power terminal 312. The positive power terminal 311 and the negative power terminal 312 are respectively used to deliver direct current to the electric vehicle. The signal terminal 32 can include a connection confirmation signal terminal 321, which is used to transmit a connection confirmation signal with the electric vehicle. By detecting the voltage of the connection confirmation signal, the charging device can determine the connection state of the charging gun head 13 and the electric vehicle. The connection state can include unconnected, half connected and fully connected. The auxiliary source terminal 33 can include a positive auxiliary source terminal 331 and a negative auxiliary source terminal 332. The positive auxiliary source terminal 331 and the negative auxiliary source terminal 332 are respectively used to connect with the positive auxiliary source line and the negative auxiliary source line of the cable. The positive auxiliary source line and the negative auxiliary source line can provide a low-voltage auxiliary power source during charging to ensure the stable operation of the electrical components in the charging device.

[0061] In addition, the signal terminal 32 can also include a communication signal terminal 322. The communication signal terminal 322 is used to transmit a message sent by the electric vehicle to the charging host during charging. The message can include at least one of a message for requesting the liquid cooling device to output cooling liquid, a message for indicating the required flow of cooling liquid, and a message for indicating the required temperature of cooling liquid.

[0062] In order to cooperate with the charging gun head 13 described above, Figure 4 An exemplary structure diagram of a cable 14 in the related technology of the present application is shown. As shown in Figure 4 The cable 14 can include a power line 41. The power line 41 includes a positive power line 411 and a negative power line 412. The positive power line 411 is used to connect with the positive power terminal of the charging gun head, and the negative power line 412 is used to connect with the negative power terminal of the charging gun head, so as to deliver direct current to the electric vehicle.

[0063] In some examples, the power line 41 in the cable 14 is connected with the power conversion device 15. The power conversion device 15 is used to convert alternating current into direct current. As shown in Figure 1 The power conversion device 15 can convert alternating current from the external power grid 20 into stable direct current, so that the charging device 10 can deliver the stable direct current to the electric vehicle 21.

[0064] In some embodiments, as Figure 4As shown, the cable 14 can further include a plurality of signal lines 42. The plurality of signal lines 42 can include a first signal line and a second signal line. The first signal line is configured to connect with the connection confirmation signal terminal and transmit the connection confirmation signal. The second signal line is configured to connect with the communication signal terminal and transmit the message sent by the electric vehicle. In some examples, the signal lines 42 transmitting similar signals can be twisted together. For example Figure 4 The two signal lines 42 at position A are twisted together.

[0065] In some embodiments, as shown in FIG. 1, the cable 14 can further include a plurality of power lines 41. The plurality of power lines 41 can include a first power line and a second power line. The first power line is configured to connect with the positive terminal of the charging gun head and transmit the charging power. The second power line is configured to connect with the negative terminal of the charging gun head and transmit the charging power. Figure 4 As shown, the cable 14 can further include an auxiliary power line 43. The auxiliary power line 43 can include a positive auxiliary power line and a negative auxiliary power line. The auxiliary power line 43 is configured to connect with the auxiliary terminal of the charging gun head and provide a low-voltage auxiliary power supply. In some embodiments, as shown in FIG. 1, the cable 14 can further include a plurality of auxiliary power lines 43. Figure 5 As shown, the cable 14 can further include a ground wire 44. The ground wire 44 is configured to connect with the ground terminal of the charging gun head.

[0066] As the charging power continues to increase, the cable 14 will generate more heat. In order to improve the heat dissipation of the cable 14, the cable 14 can further include at least one cooling pipe 45. As shown in FIG. 1, for example, the cable 14 includes four cooling pipes 45. Through the contact between the cooling pipe 45 and the power line 41, heat can be conducted from the power line 41 to the cooling pipe 45. Figure 4

[0067] The cooling pipe 45 is configured to flow with a cooling medium (e.g., a water-based solution or an oil-based solution). In order to realize the flow of the cooling medium, the cooling pipe 45 includes at least one inlet pipe and at least one outlet pipe. The cooling medium can flow in the cable through the inlet pipe and the outlet pipe, thereby effectively taking away the heat generated during the charging process. As shown in FIG. 1, for example, the first cooling pipe 451 and the second cooling pipe 452 are arranged in the cable 14. One of the first cooling pipe 451 and the second cooling pipe 452 is an inlet pipe, and the other is an outlet pipe. Figure 4 As shown, the first cooling pipe 451 and the second cooling pipe 452 are arranged in the cable 14. One of the first cooling pipe 451 and the second cooling pipe 452 is an inlet pipe, and the other is an outlet pipe.

[0068] In some embodiments, as shown in FIG. 1, the charging device 10 further includes a liquid cooling device 16. In a split charging pile, the liquid cooling device 16 can be arranged in the charging terminal 12 as shown in FIG. 1. In an integrated charging pile, the liquid cooling device 16 can be arranged in the cabinet of the charging device 10 as shown in FIG. 1. Figure 1 or Figure 2 In some embodiments, as shown in FIG. 1, the charging device 10 further includes a liquid cooling device 16. In a split charging pile, the liquid cooling device 16 can be arranged in the charging terminal 12 as shown in FIG. 1. In an integrated charging pile, the liquid cooling device 16 can be arranged in the cabinet of the charging device 10 as shown in FIG. 1. Figure 1 As shown, the first cooling pipe 451 and the second cooling pipe 452 are arranged in the cable 14. One of the first cooling pipe 451 and the second cooling pipe 452 is an inlet pipe, and the other is an outlet pipe. Figure 2 As shown, the first cooling pipe 451 and the second cooling pipe 452 are arranged in the cable 14. One of the first cooling pipe 451 and the second cooling pipe 452 is an inlet pipe, and the other is an outlet pipe.

[0069] ​In some embodiments, the charging gun head 13 can further include a cold pool. The cooling pipe of the cable 14 has one part as an inlet pipe and another part as an outlet pipe. The liquid cooling device 16 is connected to the cold pool of the charging gun head 13 through the cooling pipe of the cable 14. The circulation of the cooling medium between the charging gun head 13, the cable 14 and the liquid cooling device 16 can realize the temperature reduction of the charging gun head 13 and the cable 14.

[0070] For example, the liquid cooling device 16 includes a heat exchanger and a driving pump. One end of the inlet pipe is in communication with the heat exchanger of the liquid cooling device 16, and the other end of the inlet pipe is in communication with the cold pool of the charging gun head 13. One end of the outlet pipe is in communication with the heat exchanger of the liquid cooling device 16, and the other end of the outlet pipe is in communication with the cold pool of the charging gun head 13. The cooling medium flows out of the heat exchanger under the driving of the driving pump, flows into the outlet pipe of the cable 14, flows in the cable 14 to reduce the temperature of the cable 14, and finally flows into the cold pool of the charging gun head 13. Then, the cooling medium in the cold pool flows to the inlet pipe of the cable 14 and flows back to the heat exchanger through the inlet pipe.

[0071] For example, the liquid cooling device 16 further includes a heat exchange fan. After the cooling medium absorbs the heat of the charging gun head 13 and the cable 14, the cooling medium flows into the heat exchange channel of the heat exchanger of the liquid cooling device 16. The heat exchange fan blows air towards the heat exchanger, so that the cooling medium exchanges heat with the air through the heat exchanger. The temperature of the cooling medium is reduced after the heat exchange in the heat exchanger, and then the cooling medium flows back to the outlet pipe and the inlet pipe to reduce the temperature of the charging gun head 13 and the cable 14.

[0072] In order to increase the charging power, in some embodiments, the cross-sectional area of the power line 41 can be increased. In this case, the hardness of the cable 14 will be increased, which reduces the user experience. In other embodiments, the power line 41 can be split. That is, the originally one large-diameter power line is replaced by multiple small-diameter power lines. With the same current carrying capacity, the hardness of the multiple small-diameter power lines is lower than that of the single large-diameter power line, which can reduce the hardness of the cable and improve the user experience.

[0073] Figure 5 For example, a structure schematic diagram of the cable 14 provided by the embodiments of the present application is shown. As shown in Figure 5 The cable 14 includes a plurality of power lines 41, and the plurality of power lines 41 includes a plurality of positive power lines and a plurality of negative power lines. For example, the plurality of positive power lines is eight, and the plurality of negative power lines is eight. The plurality of positive power lines is electrically connected to the positive power terminal, and the plurality of negative power lines is electrically connected to the negative power terminal. In this case, the plurality of positive power lines and the plurality of negative power lines can realize multi-path power line energization, meet the large current carrying capacity, and thus increase the charging power.

[0074] In an embodiment, the specifications of the plurality of power lines are all less than or equal to 80 square millimeters. In addition, in order to reduce the hardness of the cable 14, in some embodiments, as shown in Figure 6 the power line 41 can include a conductor 51 and an insulating layer 52. The material of the insulating layer 52 can be Teflon or the like to achieve an insulating effect.

[0075] In some examples, as shown in Figure 6 the insulating layer 52 can include a first insulating layer 521 and a second insulating layer 522. The materials of the first insulating layer 521 and the second insulating layer 522 can be the same. The arrangement of the first insulating layer 521 and the second insulating layer 522 can make the insulating layer 52 less likely to break and expose the conductor 51, thereby making the insulating effect of the power line 41 more stable.

[0076] In some examples, the total thickness H of the first insulating layer 521 and the second insulating layer 522 is less than 0.7 millimeters. In this case, the first insulating layer 521 and the second insulating layer 522 can ensure the softness of the power line 41 while meeting the voltage resistance, so that the overall hardness of the cable 14 is lower.

[0077] In this case, in order to achieve heat dissipation of the cable 14, the cable 14 includes at least one cooling pipe 45, and each cooling pipe 45 is in contact with at least one of the plurality of power lines 41. However, due to the large number of power lines 41 after being stripped, in some examples, the number of power lines 41 is greater than the number of cooling pipes 45.

[0078] For example, as shown in Figure 7 there are four cooling pipes 45 and sixteen power lines 41, and the number of power lines 41 is greater than the number of cooling pipes 45. Since the number of power lines 41 is greater than the number of cooling pipes 45, in order to achieve heat dissipation of all power lines 41, at least two power lines 41 are in contact with the same cooling pipe 45.

[0079] In order to dissipate heat from more power lines 41, the cooling pipe 45 is provided with a plurality of cooling pipes. All power lines 41 are divided into a plurality of parts, each part including at least one power line 41, and the power lines 41 of each part are in contact with the same cooling pipe 45.

[0080] For example, as shown in Figure 7As shown, the sixteen power lines 41 can be divided into four parts. These four parts can include Part B1, Part B2, Part B3, and Part B4. All power lines 41 in Part B1 contact the first cooling pipe 451. All power lines 41 in Part B2 contact the second cooling pipe 452. All power lines 41 in Part B3 contact the third cooling pipe 453. All power lines 41 in Part B4 contact the fourth cooling pipe 454. Dividing the sixteen power lines 41 into multiple parts, with each part's power lines 41 contacting the same cooling pipe, ensures that all power lines 41 are in contact with the cooling pipe 45, thus achieving better heat dissipation.

[0081] It should be noted that the embodiments of this application do not limit the number of power lines in each part. In some embodiments, the number of power lines in each part may be unequal. For example, the first part includes six power lines, and the second part includes eight power lines.

[0082] In some embodiments, any one of the power lines 41 is in contact with at least one cooling pipe 45. In this case, the cooling pipe can meet the heat dissipation requirements of all power lines.

[0083] In some embodiments, such as Figure 5 As shown, cable 14 also includes a sheath 46. The sheath 46 forms a cavity, and power lines, signal lines, auxiliary power lines, ground lines, and cooling pipes are all housed within the cavity.

[0084] In some examples, such as Figure 8 As shown, the cladding 46 includes a fixing layer 460. The fixing layer 460 is wound around the outside of power lines, signal lines, auxiliary power lines, ground lines, cooling pipes, etc., to fix the relative positional relationship of the power lines, signal lines, auxiliary power lines, ground lines, and cooling pipes within the cavity. In some examples, the fixing layer 460 may include a wrapping.

[0085] In some examples, the cladding 46 includes a heat-equalizing layer. The heat-equalizing layer is made of metal. Metal has good thermal conductivity, which helps to even out the temperature of the cable and conducts heat from the cavity to the air more quickly. Furthermore, metal can act as a shield.

[0086] For example, such as Figure 8 As shown, the temperature-equalizing layer of the cladding 46 may include a first layer 461, which wraps around the fixing layer 460. In one embodiment, the material of the first layer 461 may be tin-plated copper wire.

[0087] For example, continue as follows Figure 8As shown, the temperature uniform layer of the cladding 46 can further include a second layer 462, which wraps outside the fixed layer 460. In one embodiment, the second layer wraps outside the first layer 461. In one embodiment, the material of the second layer 462 can be aluminum plastic composite material.

[0088] In some examples, the cladding 46 further includes a protective layer, which wraps outside the temperature uniform layer. The material of the protective layer includes insulating material. For example, continuing as Figure 8 As shown, the protective layer of the cladding can include a third layer 463. The third layer 463 can protect and isolate the first layer 461, the second layer 462, and the power lines, signal lines, etc. in the cavity. Due to the corrosion resistance, heat resistance, insulation, etc. of the insulating material, the service life of the cable can be effectively prolonged, and the safety and stability of the cable can be improved.

[0089] In one embodiment, the material of the third layer can be thermoplastic urethane (TPU). In addition, the thickness of the third layer can be any suitable size, for example, when the thickness of the third layer is less than 3 mm, the Shore hardness thereof is between 75A and 81A. In this way, the third layer can achieve better softness while meeting durability.

[0090] In this case, the cladding 46 can enable the cable 14 to achieve better heat dissipation effect. In some embodiments, as Figure 5 As shown, at least one power line 41 is in contact with the cladding 46. In this case, a part of the heat generated by the power line 41 can be transferred to the cladding 46 and conducted to the air through the cladding 46, thereby achieving heat dissipation effect.

[0091] In some embodiments, as Figure 5 As shown, the auxiliary source line 43 is in contact with the cladding 46. During the charging process, the auxiliary source line 43 also generates a certain amount of heat. By contacting the auxiliary source line 43 with the cladding 46, a part of the heat generated by the auxiliary source line 43 can be transferred to the cladding 46 and conducted to the air or the cooling pipe 45 through the cladding 46.

[0092] The auxiliary source line can be any suitable size, for example, in one embodiment, the specification of the auxiliary source line 43 is 2.5 square millimeters, the specification of the signal line 42 is less than or equal to 0.75 square millimeters, and the specification of the ground line 44 is 6 square millimeters. Since the diameter of the auxiliary source line 43 is smaller than that of the power line 41, in some examples, the auxiliary source line 43 can be arranged in the gap between the plurality of power lines 41. Similarly, since the diameter of the signal line 42 is also smaller than that of the power line 41, in some examples, the signal line 42 can also be arranged in the gap between the plurality of power lines 41.

[0093] In one embodiment, for the electric wires with small diameter (e.g., less than or equal to 2.5 square millimeters), such as auxiliary power wires and signal wires, the wires are twisted in the cable. In this way, the breakage of the small diameter wires due to bending and twisting can be avoided, and the stability of the cable can be ensured.

[0094] In some embodiments, at least one cooling tube 45 is in contact with the cladding 46 to help the cladding 46 achieve temperature reduction and uniformity, and make the temperature of the cable more uniform. As shown in Figure 5 the four cooling tubes 45 are in contact with the cladding 46. In this case, as shown in the four cooling tubes 45 can be arranged at intervals along the circumference of the cavity. In this way, the part between the two adjacent cooling tubes 45 arranged at intervals, which is not in contact with the cladding 46, can be used to arrange other heat generating elements, so that the cooling effect of the cooling tubes can be more fully utilized.

[0095] Figure 5 In some embodiments, as shown in Figure 5 the four cooling tubes 45 are in contact with the cladding 46. In this case, as shown in the four cooling tubes 45 can be arranged at intervals along the circumference of the cavity. In this way, the part between the two adjacent cooling tubes 45 arranged at intervals, which is not in contact with the cladding 46, can be used to arrange other heat generating elements, so that the cooling effect of the cooling tubes can be more fully utilized.

[0096] Figure 5 In some embodiments, as shown in the four cooling tubes 45 are in contact with the cladding 46. In this case, as shown in

[0097] the four cooling tubes 45 can be arranged at intervals along the circumference of the cavity. In this way, the part between the two adjacent cooling tubes 45 arranged at intervals, which is not in contact with the cladding 46, can be used to arrange other heat generating elements, so that the cooling effect of the cooling tubes can be more fully utilized.

[0098] In some embodiments, as shown in the four cooling tubes 45 are in contact with the cladding 46. In this case, as shown in

[0099] the four cooling tubes 45 can be arranged at intervals along the circumference of the cavity. In this way, the part between the two adjacent cooling tubes 45 arranged at intervals, which is not in contact with the cladding 46, can be used to arrange other heat generating elements, so that the cooling effect of the cooling tubes can be more fully utilized. Figure 9As shown, the distance between two adjacent cooling tubes 45 along the circumference of the cavity is equal. For example, the first distance D1 between the first cooling tube 451 and the second cooling tube 452, and the second distance D2 between the first cooling tube 451 and the third cooling tube 453 are equal. In this way, the plurality of cooling tubes 45 are evenly distributed along the circumference of the cavity, and the cooling tubes 45 have better uniform temperature effect on the cladding 46 and better heat dissipation effect on the power lines 41.

[0100] The first distance D1 is, for example, the distance between the contact point O3 of the first cooling tube 451 and the cladding 46 and the contact point O1 of the second cooling tube 452 and the cladding 46 along the inner surface of the cladding 46. The second distance D2 is, for example, the distance between the contact point O3 of the first cooling tube 451 and the cladding 46 and the contact point O2 of the third cooling tube 453 and the cladding 46 along the inner surface of the cladding 46.

[0101] It can be understood that the first distance D1 and the second distance D2 are equal, which means equal in a theoretical case. In actual application, the fluctuations of the first distance D1 and the second distance D2 are also considered equal within a preset error range (such as ±0.5 mm).

[0102] In some embodiments, the plurality of positive power lines (all positive power lines) are located on the same side of the plurality of negative power lines (all negative power lines) along the radial direction of the cavity. The radial direction refers to any direction passing through the geometric center of the cavity and perpendicular to the extension direction of the cable. For example, as shown in FIG. 1, the extension direction of the straight line L is the radial direction of the cavity, and the straight line L divides the cavity into two regions, for example, the first region C1 and the second region C2. The power lines 41 in the first region C1 are all positive power lines, and the power lines 41 in the second region C2 are all negative power lines. In this case, all positive power lines are located on the same side of all negative power lines. Figure 9 As shown, the extension direction of the straight line L is the radial direction of the cavity, and the straight line L divides the cavity into two regions, for example, the first region C1 and the second region C2. The power lines 41 in the first region C1 are all positive power lines, and the power lines 41 in the second region C2 are all negative power lines. In this case, all positive power lines are located on the same side of all negative power lines.

[0103] Considering that the positive power terminal and the negative power terminal of the charging gun head are also located on opposite sides, the plurality of positive power lines located on the same side of the plurality of negative power lines along the radial direction of the cavity can facilitate the electrical connection between the positive power terminal and the plurality of positive power lines, and the electrical connection between the negative power terminal and the plurality of negative power lines.

[0104] The outer diameter of the cable can be any suitable size, for example, in some embodiments, the outer diameter of the cable ranges from 36.5 mm to 40.5 mm. For example, the outer diameter of the cable 14 can be 36.5 mm, 37 mm, 37.5 mm, 38 mm, 38.5 mm, 39 mm, or 39.5 mm. In this case, the cable can meet the 1000 A + 1000 V current carrying capacity rating, and the ratio of the total cross-sectional area of the power wires to the cross-sectional area of the cable (i.e., the power density) can be 14.11%. The cross-sectional area of the power wires refers to the cross-sectional area of the power wires along the direction of extension of the cable, and the cross-sectional area of the cable refers to the cross-sectional area of the cable along the direction of extension of the cable.

[0105] In the description of the specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0106] The above only describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cable for a charging gun, characterized in that, include: Cladding, multiple power lines, and at least one cooling pipe; The cladding forms a cavity, and the plurality of power lines and the at least one cooling pipe are disposed within the cavity; The at least one cooling pipe is used to supply cooling medium flow, each of the cooling pipes is in contact with at least one of the plurality of power lines, and the at least one cooling pipe is in contact with the cladding.

2. The cable according to claim 1, characterized in that, The cooling pipes are provided in multiple ways, and the number of power lines is greater than the number of cooling pipes. The multiple power lines are divided into multiple parts, and each part includes at least one power line. The at least one power line in each part contacts the same cooling pipe.

3. The cable according to claim 1 or 2, characterized in that, The cooling pipes are provided in multiple ways, and the multiple cooling pipes are arranged at intervals along the circumference of the cavity, and all of the multiple cooling pipes are in contact with the cladding.

4. The cable according to claim 3, characterized in that, Along the circumference of the cavity, the spacing between two adjacent cooling pipes is equal.

5. The cable according to any one of claims 1-4, characterized in that, The cable also includes an auxiliary power line, which is used to connect to the auxiliary power terminal of the charging gun and is in contact with the cladding.

6. The cable according to any one of claims 1-5, characterized in that, The cable also includes a ground wire, and the plurality of power wires are circumferentially wrapped around the ground wire, with at least one power wire between each cooling pipe and the ground wire.

7. The cable according to any one of claims 1-6, characterized in that, The cladding layer includes a fixing layer, a temperature equalization layer, and a protective layer; The fixing layer is used to fix the relative positions of the plurality of power lines and at least one cooling pipe; the material of the temperature equalization layer includes metal; the protective layer is wrapped around the temperature equalization layer, and the material of the protective layer includes insulating material.

8. A charging gun, characterized in that, include: The charging gun head, and the cable as described in any one of claims 1-7; The charging gun head includes a positive power terminal and a negative power terminal; the plurality of power lines include a plurality of positive power lines and a plurality of negative power lines, the plurality of positive power lines being electrically connected to the positive power terminal, and the plurality of negative power lines being electrically connected to the negative power terminal.

9. The charging gun according to claim 8, characterized in that, The plurality of positive power lines are located on the same side of the plurality of negative power lines along the radial direction of the cavity.

10. A charging device, characterized in that, include: A power conversion device, the charging gun as described in claim 8 or 9; The power conversion device is used to convert alternating current into direct current, and the plurality of power lines are all connected to the power conversion device.

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