Liquid-cooled cable, charging gun and charging device

Abstract

The application provides a liquid cooling cable, a charging gun and a charging device, and is applied to the technical field of new energy sources, wherein the liquid cooling cable comprises a liquid cooling pipe, a first conductor and a second conductor. The first end of the liquid cooling pipe is used for connecting a cooling medium supply device of a charging pile, and the second end of the liquid cooling pipe is used for connecting a cooling pool of the charging gun. The first conductor and the second conductor are arranged at intervals outside the liquid cooling pipe, and the first conductor and the second conductor extend along the length direction of the liquid cooling cable. In addition, the first end of the first conductor and the first end of the second conductor are respectively used for connecting a detection circuit in the charging pile. Through the above manner, the detection circuit in the charging pile can realize the liquid leakage detection of the liquid cooling pipe by detecting the resistance value change between the first conductor and the second conductor.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a liquid-cooled cable, a charging gun, and a charging device. Background Technology

[0002] With the rapid development of the new energy vehicle industry, charging piles are becoming increasingly efficient, and charging times are getting shorter, in order to meet people's demands for faster charging. However, the increased power leads to high heat generation in the charging cables within the charging gun. Currently, the common cooling method is to place liquid cooling pipes inside the cables to keep them within a suitable operating temperature range. However, these liquid cooling pipes may be damaged or aged during material handling, assembly, and prolonged use, leading to leakage and affecting charging safety. Therefore, providing a solution to promptly detect liquid cooling pipe leaks is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This application provides a liquid-cooled cable, a charging gun, and a charging device to detect leakage in the liquid-cooled cable.

[0004] To achieve the above objectives, the embodiments of this application provide the following technical solutions.

[0005] In a first aspect, embodiments of this application provide a liquid-cooled cable, which includes a liquid-cooling pipe, a first conductor, and a second conductor. The first end of the liquid-cooling pipe is used to connect to a cooling medium supply device of a charging pile, and the second end of the liquid-cooling pipe is used to connect to a cooling pool of a charging gun. The first conductor and the second conductor are spaced apart outside the liquid-cooling pipe, and both the first conductor and the second conductor extend along the length of the liquid-cooled cable. The first end of the first conductor and the first end of the second conductor are also used to connect to a detection circuit within the charging pile.

[0006] In this way, when the liquid cooling pipe is not leaking, the gap between the first and second conductors prevents them from conducting. Therefore, the resistance value detected by the detection circuit in the charging pile is much greater than the sum of the maximum resistance values ​​of the first and second conductors. When the liquid cooling pipe leaks, the cooling medium flows into the gap between the first and second conductors, making them conductive. At this time, the resistance value detected by the detection circuit in the charging pile is the sum of the resistance values ​​from the first end of the first conductor to the point of continuity and the resistance values ​​from the first end of the second conductor to the point of continuity. Based on this principle, leak detection of the liquid cooling pipe can be achieved by detecting the resistance value between the first and second conductors.

[0007] In one embodiment, the liquid-cooled cable further includes at least one third conductor disposed outside the liquid-cooled pipe. The third conductor extends along the length of the liquid-cooled cable, and is spaced apart from both the first and second conductors. The first end of the third conductor is also used to connect to a detection circuit. Therefore, by increasing the number of conductors, the detection area covered outside the liquid-cooled pipe is wider, increasing the detection space and enabling more timely detection of leaks at various points on the liquid-cooled pipe.

[0008] In one embodiment, the first and second conductors are spaced apart outside the liquid cooling pipe, and are in contact with the surface of the liquid cooling pipe. When the liquid cooling pipe leaks, and the leakage of cooling medium is minimal, the distance between the first and second conductors and the liquid cooling pipe, and the limited outflow range of the cooling medium, makes it impossible to detect the leak in a timely manner using the first and second conductors. With the above method, the first and second conductors are in direct contact with the surface of the liquid cooling pipe, and in the event of a leak, the distance between the first and second conductors and the leak point is very short. Therefore, even when the leakage of cooling medium is minimal, the leak can be detected more promptly by measuring the resistance value between the first and second conductors.

[0009] In one embodiment, both the first conductor and the second conductor are wound around the outside of the liquid cooling pipe. When the first and second conductors extend directly along the length of the liquid cooling cable from one end to the other, a significant amount of cooling medium needs to be discharged before leakage can be detected if leakage occurs in areas of the liquid cooling pipe far from the first and second conductors. By winding the first and second conductors around the liquid cooling cable, a larger area can be covered around the liquid cooling pipe, allowing for timely detection of any leakage around the pipe.

[0010] In one embodiment, the first conductor and the second conductor are disposed on the inner wall of the insulating protective layer of the liquid-cooled cable, and the first conductor and the second conductor are wound around the outside of the liquid-cooled pipe along the inner wall of the insulating protective layer.

[0011] In one embodiment, the winding direction of the first conductor is the same as that of the second conductor. In this manner, the first and second conductors extend from the first end to the second end of the liquid cooling pipe in the same direction, achieving leakage detection while reducing the difficulty of conductor arrangement.

[0012] In one embodiment, the first conductor and the second conductor are wound in opposite directions (180 degrees apart) from one end of the liquid-cooled cable. This 180-degree difference in starting directions allows the first and second conductors to be intertwined while maintaining a distance from each other outside the liquid-cooled pipe, resulting in a wider detection area covered by the pipe and further increasing the detection space. This enables more timely detection of leaks in the liquid-cooled pipe.

[0013] In one embodiment, the liquid-cooled cable further includes a charging cable and a communication cable, with the first conductor and the second conductor wound around the surface of the charging cable or the communication cable. Based on this, with the first and second conductors spaced apart outside the liquid-cooled pipe, more arrangement methods can be used to achieve leakage detection of the liquid-cooled pipe.

[0014] Secondly, embodiments of this application provide a charging gun, which includes a charging terminal, a cooling pool, and a liquid-cooled cable as described in any of the embodiments of the first aspect. The second end of the liquid-cooled pipe in the liquid-cooled cable is connected to the cooling pool, which is used to dissipate heat from the charging terminal. Additionally, the liquid-cooled cable also includes a charging cable. The charging terminal includes a cable connection end and a charging interface end. The charging interface end is used to connect to the charging interface of an electric vehicle, the cable connection end is connected to the first end of the charging cable, and the second end of the charging cable is used to connect to a power conversion device within a charging pile.

[0015] In one embodiment, the second ends of the first conductor and the second conductor of the liquid-cooled cable are spaced apart and both contact the surface of the cooling pool. In this manner, leakage detection of the liquid-cooled pool can also be achieved using the first and second conductors.

[0016] In one embodiment, the first conductor and the second conductor are wound around the surface of the cooling pool. This method increases the leakage detection space of the cooling pool, allowing for more timely detection of leaks at various points within the cooling pool.

[0017] Thirdly, embodiments of this application provide a charging device, which includes a charging pile and the charging gun described in the second aspect above. The charging pile includes a power conversion device and a detection circuit. The power conversion device is connected to the second end of a charging cable, and the first ends of the first conductor and the first ends of the second conductor in the liquid-cooled cable are respectively connected to the detection circuit.

[0018] In one embodiment, a detection circuit is used to detect the resistance value between a first conductor and a second conductor. The charging station is used to stop supplying power to the charging cable when the resistance value between the first conductor and the second conductor is less than a resistance value threshold.

[0019] The technical principles and beneficial effects of the second and third aspects mentioned above can be referred to the relevant description of the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0020] Figure 1 A schematic diagram of a charging device provided in an embodiment of this application;

[0021] Figure 2 A schematic diagram of a liquid cooling pipeline provided in an embodiment of this application;

[0022] Figure 3 A schematic diagram illustrating the conductor arrangement of a liquid cooling pipe provided in an embodiment of this application;

[0023] Figure 4 Another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in the embodiments of this application;

[0024] Figure 5 Another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in the embodiments of this application;

[0025] Figure 6 Another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in the embodiments of this application;

[0026] Figure 7 Another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in the embodiments of this application;

[0027] Figure 8 This is another schematic diagram of the charging device provided in the embodiments of this application. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] It should be noted that the terms "in one embodiment" or "exemplary" in this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "in one embodiment" or "exemplary" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in one embodiment" or "exemplary" is intended to present the relevant concepts in a specific manner.

[0030] With the rapid development of the new energy vehicle industry, the driving range of electric vehicles is constantly increasing, and the battery capacity is also growing larger. This necessitates increasing charging power to achieve fast charging and address the charging speed issue. Increasing the charging current is a common method for achieving high-power charging; however, the unavoidable resistance of cable materials leads to increased heat dissipation in the charging gun. The most basic way to reduce heat dissipation is to increase the wire diameter, but this significantly increases the size and weight of the charging gun. With further increases in charging current, simply increasing the cable diameter is no longer feasible. Therefore, how to improve heat dissipation has become a key issue restricting the improvement of charging power.

[0031] Currently, liquid cooling technology is commonly used to dissipate heat from charging cables. The charging cable contains a liquid cooling pipe connected to a cooling medium supply device. The cooling medium circulates within the pipes formed by the cold source and the liquid cooling pipe, carrying away the heat generated by the charging cable. However, during use, charging cables may fall to the ground and be run over by vehicles or users, leading to cooling medium leakage and compromising charging safety.

[0032] To address the aforementioned issues, this application provides a liquid-cooled cable, a charging gun, and a charging device. During the charging process of an electric vehicle using the charging gun of the charging device, this application can detect leakage in the liquid-cooled cable using at least two spaced conductors, thereby promptly identifying leaks in the liquid-cooled pipe and allowing the charging station to stop supplying power to the charging cable of the charging gun.

[0033] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of a charging device provided in an embodiment of this application. Figure 2 This is a schematic diagram of a liquid cooling pipeline provided in an embodiment of this application. Figure 1 As shown, the charging device 10 may include a charging gun 20 and a charging pile 30. The charging pile 30 is generally installed in a charging station, and the charging pile 30 charges electric vehicles through the charging gun 20. The charging pile 30 includes a housing 33 and a power conversion device 31 and a cooling medium supply device 32 disposed within the housing 33.

[0035] like Figure 2As shown, the charging gun 20 includes a charging terminal 21, a liquid-cooled cable 22, and a cooling tank 23. The liquid-cooled cable 22 includes a charging cable 221, an insulating protective layer 222, and a liquid-cooled pipe forming a liquid-cooled pipeline 110. Both the liquid-cooled pipeline 110 and the charging cable 221 are housed within the insulating protective layer 222. One end of the charging cable 221 is electrically connected to the charging terminal 21, and the other end is electrically connected to the power conversion device 31. The liquid-cooled pipeline 110 connects the cooling tank 23 and the cooling medium supply device 32 to form a circulation path for the cooling medium.

[0036] The power conversion device 31 can transmit electrical energy from the grid or a power supply capacitor to the charging terminal 21 via the charging cable 221. The charging terminal 21 then transmits the electrical energy to the electric vehicle to charge it. Additionally, the power conversion device 31 can control the output power supplied to the charging cable 221, thereby powering and disconnecting the cable. The cooling medium supply device 32 can deliver a low-temperature cooling medium to the liquid cooling pipeline 110 and can convert the heat-absorbing cooling medium into a low-temperature cooling medium. Furthermore, the cooling medium supply device 32 can circulate the cooling medium between the liquid cooling pipeline 110 and the cooling medium supply device 32. The charging terminal 21 includes a cable connection end 211 and a charging interface end 212. The first end of the charging cable 221 is used to connect to the cable connection end 211, and the second end of the charging cable 221 is used to connect to the power conversion device 31 in the charging pile 30. The first end of the liquid cooling pipe is connected to the cooling medium supply device 32, the cooling pool 23 is connected to the second end of the liquid cooling pipe, and the charging interface end 212 is used to connect to the charging interface of the electric vehicle.

[0037] In some scenarios, the liquid-cooled cable 22 also includes a communication cable ( Figure 2 (Not shown in the image), one end of the communication cable is connected to the charging pile 30, and the other end of the communication cable is connected to the electric vehicle through the communication interface of the charging gun 20. The charging pile 30 can obtain information such as the battery level, charging current, and charging temperature of the electric vehicle through the communication cable, so that the charging pile 30 can actively adjust the charging power of the electric vehicle.

[0038] In some scenarios, the power conversion device 31 is connected to the charging cable 221 via a power distribution device. By controlling the power distribution device, the charging cable 221 can be powered on and off. The power distribution device uses a series of devices capable of switching control functions, such as switches and relays.

[0039] Still Figure 2As shown, the liquid cooling pipeline 110 includes at least an inlet pipe 111 and a return pipe 112. The inlet pipe 111 and the return pipe 112 can be of the same type or different types of liquid cooling pipes. The output end of the inlet pipe 111 is connected to the input end of the return pipe 112. Furthermore, the connection point between the inlet pipe 111 and the return pipe 112 is located within the charging terminal 21. The input end of the inlet pipe 111 is connected to the outlet of the cooling medium supply device 32. The output end of the return pipe 112 is connected to the return port of the cooling medium supply device 32.

[0040] Still Figure 2 As shown, the output end of the inlet pipe 111 is connected to the input end of the return pipe 112 via the cooling pool 23, so that the cooling medium in the inlet pipe 111 can flow into the return pipe 112. In addition, in some examples, the cooling pool 23 can be made of a thermally conductive material, so that the cooling medium in the cooling pool 23 can exchange heat with the heat-generating device in the charging terminal 21 to dissipate heat from the charging terminal 21.

[0041] In the embodiments of this application, the cooling medium can be a liquid such as water, cooling water, or fluorinated liquid, and no specific limitation is made here.

[0042] When the liquid-cooled cable 22 falls to the ground, it may be run over by the tires of an electric vehicle, or even squeezed and compressed by the electric vehicle and buildings. This would reduce or block the opening of the liquid-cooled pipe 110 at the point of crushing, thus dividing the cooling medium in the liquid-cooled pipe 110 into two parts. One part of the cooling medium will flow along the liquid-cooled pipe 110 into the cooling medium supply device 32, without damaging the liquid-cooled pipe 110 between the cooling medium supply device 32 and the crushed point. The other part of the cooling medium will move along the liquid-cooled pipe 110 towards the charging terminal 21. However, due to the limited volume of the liquid cooling pipe 110 between the charging terminal 21 and the crushed area, and the increase in the cooling medium, the pressure inside the liquid cooling pipe 110 will increase. This will cause the cooling medium flowing to the charging terminal 21 to squeeze the liquid cooling pipe 110, which may cause the seal of the liquid cooling pipe 110 to break and leak, or the cooling medium may squeeze the pipe of the liquid cooling pipe 110 to break, causing irreversible damage, thereby affecting charging safety.

[0043] To address the aforementioned problems, this application provides a liquid-cooled cable 22. Figure 2Based on this, the liquid-cooled cable 22 also includes at least two conductors spaced apart outside the liquid-cooling pipe. Both conductors extend along the length of the liquid-cooled cable, and one end of each conductor is used to connect to a detection circuit within the charging pile. The two conductors can extend directly from one end of the liquid-cooled cable 22 to the other outside the liquid-cooling pipe, or they can be wrapped around the liquid-cooling pipe or the surface of another cable (e.g., charging cable 221) to extend from one end of the liquid-cooled cable 22 to the other. The charging pile 30 can stop supplying power to the charging cable 221 when the resistance between the two conductors is less than a resistance threshold. Therefore, when the liquid-cooling pipe leaks, the gap between the two conductors is filled with cooling medium, and the leakage problem can be detected by detecting the resistance between the two conductors.

[0044] Furthermore, in order to increase the detection space, the number of conductors in the liquid-cooled cable 22 can be increased, so as to detect the leakage problem of the liquid-cooled pipe more promptly.

[0045] To facilitate understanding of the liquid-cooled cable provided in the embodiments of this application, the embodiments of this application are illustrated with the following multiple embodiments.

[0046] Figure 3 This is a schematic diagram illustrating the conductor arrangement of the liquid-cooled pipe provided in this application embodiment. To address the aforementioned problems, this application embodiment provides a liquid-cooled cable 22. In addition to the liquid-cooled pipe, the liquid-cooled cable 22 also includes a first conductor 120 and a second conductor 130. The first conductor 120 and the second conductor 130 are spaced apart outside the liquid-cooled pipe and extend directly from one end of the liquid-cooled cable 22 to the other end. The first end of both the first conductor 120 and the first end of the second conductor 130 are used to connect to the detection circuit 34 within the charging pile 30. Alternatively, the liquid-cooled pipe could also be a return pipe 112.

[0047] By utilizing the conductivity of the cooling medium, the detection circuit 34 can detect leakage in the liquid cooling pipe when the resistance between the first conductor 120 and the second conductor 130 changes. When there is no leakage, because the first conductor 120 and the second conductor 130 are spaced apart, they are not conductive, and the resistance detected by the detection circuit 34 is much greater than the sum of the maximum resistance values ​​of the first conductor 120 and the second conductor 130 (i.e., the resistance threshold). When leakage occurs, the cooling medium flows into the gap between the first conductor 120 and the second conductor 130, making them conductive. The resistance detected by the detection circuit 34 is the sum of the resistance values ​​from the first end of the first conductor 120 to the leakage point and the resistance values ​​from the first end of the second conductor 130 to the leakage point. At this time, the resistance value detected by the detection circuit 34 inside the charging pile 30 is less than the sum of the maximum resistance values ​​of the first conductor 120 and the second conductor 130. Based on this, leakage detection of the liquid cooling pipe can be achieved based on the above characteristics.

[0048] In this embodiment, the first conductor 120 and the second conductor 130 can be exposed wires made of metal, carbon fiber, graphite, or other materials with good conductivity. Depending on the actual testing requirements, the first conductor 120 and the second conductor 130 can extend from one end of the liquid-cooled cable 22 to the other end in various ways.

[0049] In one embodiment, the first conductor 120 and the second conductor 130 may be wires. When the first conductor 120 and the second conductor 130 are wires, the first conductor 120 and the second conductor 130 can extend directly from one end of the liquid-cooled cable 22 to the other end of the liquid-cooled cable 22.

[0050] Used in liquid-cooled cable 22 Figure 3 In the structure shown, the sum of the maximum resistance values ​​of the first conductor 120 and the second conductor 130 can be used as a resistance threshold. When the liquid cooling pipe leaks, the cooling medium flows into the gap between the first conductor 120 and the second conductor 130, making them conductive. The detection circuit 34 within the charging pile 30 can detect that the resistance value between the first conductor 120 and the second conductor 130 is less than the sum of the maximum resistance values ​​of the first conductor 120 and the second conductor 130. At this time, the charging pile 30 stops supplying power to the charging cable 221.

[0051] In one embodiment, when the power conversion device 31 is directly connected to the charging cable 221, if the detection circuit 34 detects that the resistance value between the first conductor 120 and the second conductor 130 is less than the sum of the maximum resistance value of the first conductor 120 and the maximum resistance value of the second conductor 130, the charging pile 30 controls the power conversion device 31 to stop outputting power, so as to stop supplying power to the liquid-cooled cable 22, thereby avoiding leakage of liquid-cooled pipe that may affect charging safety.

[0052] In one embodiment, when the power conversion device 31 is connected to the charging cable 221 via the configuration device, if the detection circuit 34 detects that the resistance value between the first conductor 120 and the second conductor 130 is less than the sum of the maximum resistance values ​​of the first conductor 120 and the second conductor 130, the charging pile 30 controls the configuration device to disconnect the power conversion device 31 from the charging cable 221 or controls the power conversion device 31 to stop outputting power, thereby stopping the power supply to the liquid-cooled cable 22 and preventing leakage of the liquid-cooled pipe from affecting charging safety.

[0053] In one embodiment, the first conductor 120 and the second conductor 130 maintain the same spacing from one end of the liquid-cooled cable 22 to the other end of the liquid-cooled cable 22.

[0054] In another embodiment, the distance between the first conductor 120 and the second conductor 130 from one end of the liquid-cooled cable 22 to the other end of the liquid-cooled cable 22 gradually decreases, or the distance between the first conductor 120 and the second conductor 130 from one end of the liquid-cooled cable 22 to the other end of the liquid-cooled cable 22 gradually increases.

[0055] In another embodiment, the distance between the first conductor 120 and the second conductor 130 from one end of the liquid-cooled cable 22 to the other end of the liquid-cooled cable 22 can also be increased first and then gradually decreased.

[0056] It is understood that the spacing between the first conductor 120 and the second conductor 130 in the above embodiments is only an exemplary implementation provided by the embodiments of this application. In the actual liquid-cooled cable 22, the first conductor 120 and the second conductor 130 only need to maintain a gap when extending from one end of the liquid-cooled cable 22 to the other end.

[0057] In one embodiment, both the first conductor 120 and the second conductor 130 are in contact with the liquid cooling pipe. Therefore, even if the liquid cooling pipe leaks and only a small amount of cooling medium flows out, the cooling medium can still fill the gap between the first conductor 120 and the second conductor 130. In this case, the detection circuit 34 can also detect leakage in the liquid cooling pipe by detecting the resistance value between the first conductor 120 and the second conductor 130.

[0058] In one embodiment, the first conductor 120 and the second conductor 130 can also extend to the cooling pool 23 and contact the surface of the cooling pool 23. Based on this, leakage problems in the cooling pool 23 can also be detected by the first conductor 120 and the second conductor 130.

[0059] When using the liquid-cooled cable 22 in the above embodiments, although leakage detection of the liquid-cooled pipe can be achieved through the first conductor 120 and the second conductor 130, the detection space for leakage detection through the first conductor 120 and the second conductor 130 is limited. Specifically, when the interval between the first conductor 120 and the second conductor 130 is small, leakage points closer to the first conductor 120 and the second conductor 130 can be detected in a timely manner, while leakage points farther away from the first conductor 120 and the second conductor 130 require a larger leakage volume to be detected. Therefore, the liquid-cooled cable 22 provided in this application embodiment can also increase the detection space by increasing the number of conductors, so as to detect leakage problems of the liquid-cooled pipe more promptly.

[0060] Figure 4 This is another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in an embodiment of this application. In one embodiment, as... Figure 4 As shown, in Figure 3 Building upon the existing structure, the liquid-cooled cable 22 provided in this embodiment further includes a third conductor 140, which extends along the length of the liquid-cooled cable 22. The first end of the third conductor 140 is connected to the detection circuit 34, and the third conductor 140 is spaced apart from the first conductor 120 and the second conductor 130. Based on this, the detection circuit 34 can detect leakage in the liquid-cooled pipe by detecting changes in the resistance between any two conductors. After the detection circuit 34 detects leakage in the liquid-cooled pipe, the charging pile 30 can control the power conversion device 31 or the configuration device to stop supplying power to the liquid-cooled cable 22.

[0061] Still Figure 4 As shown, the first conductor 120, the second conductor 130, and the third conductor 140 are equally spaced outside the liquid cooling pipe. Based on this, leakage detection can be performed in a timely manner in the area between any two conductors outside the liquid cooling pipe.

[0062] In one embodiment, the first conductor 120, the second conductor 130, and the third conductor 140 may also be arranged at different intervals. For example, the interval between the first conductor 120 and the second conductor 130 may be greater than the interval between the second conductor 130 and the third conductor 140, and the interval between the second conductor 130 and the third conductor 140 may be greater than the interval between the third conductor 140 and the first conductor 120. Alternatively, the interval between the first conductor 120 and the second conductor 130 may be equal to the interval between the second conductor 130 and the third conductor 140, and the interval between the second conductor 130 and the third conductor 140 may be greater than the interval between the third conductor 140 and the first conductor 120. Furthermore, the third conductor 140 may extend to the cooling pool 23 and contact the surface of the cooling pool 23. Based on this, the charging pile 30 can control the power conversion device 31 or the configuration device to stop supplying power to the liquid-cooled cable 22 when the detection circuit 34 detects that the resistance value between any two of the first conductor 120, the second conductor 130, and the third conductor 140 is less than the sum of the maximum resistance values ​​of the two conductors.

[0063] Furthermore, based on the same technical principle, the liquid-cooled cable 22 can also include two or more third conductors 140. The spacing between any two conductors, including the first conductor 120 and the second conductor 130, can be the same or different; this embodiment does not impose specific limitations on this.

[0064] Furthermore, the first conductor 120, the second conductor 130, and the third conductor 140 may be made of the same material, or they may be made of different materials. The first conductor 120, the second conductor 130, and the third conductor 140 may be made of metallic or other non-metallic conductive materials; this embodiment does not impose specific limitations on this.

[0065] Figure 5 This is another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in an embodiment of this application. In one embodiment, as... Figure 5 As shown, the liquid-cooled cable 22 provided in this embodiment includes a liquid-cooling tube 110, a first conductor 120, and a second conductor 130. The first conductor 120 and the second conductor 130 are located outside the liquid-cooling tube. Both the first conductor 120 and the second conductor 130 extend from one end of the liquid-cooled cable 22 in a wound manner to the other end. The first end of the first conductor 120 and the first end of the second conductor 130 are both used to connect to the detection circuit 34 within the charging pile 30. The first conductor 120 and the second conductor 130 are spaced apart.

[0066] Still Figure 5As shown, in one embodiment, the first conductor 120 and the second conductor 130 are kept at a distance from each other, and the winding direction of the first conductor 120 is the same as that of the second conductor 130. In this way, the first conductor 120 and the second conductor 130 can be wound around the liquid cooling pipe in the same winding direction, increasing the leakage detection space while reducing the difficulty of conductor arrangement.

[0067] Figure 6 This is another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in an embodiment of this application. In one embodiment, as... Figure 6 As shown, in Figure 5 Based on the above, the liquid-cooled cable 22 provided in this application embodiment also includes a third conductor 140. The third conductor 140 extends from the first end of the liquid-cooled pipe to the second end of the liquid-cooled pipe in the winding direction of the first conductor 120 and the second conductor 130, and the third conductor 140 is spaced apart from the first conductor 120 and the second conductor 130 respectively.

[0068] Based on this, leaks in liquid cooling pipes can be detected by measuring the change in resistance between any two conductors. Furthermore, the increased number of conductors expands the detection space for leak detection.

[0069] Furthermore, based on the same technical principle, the liquid-cooled cable 22 can also include two or more third conductors 140, and each conductor outside the liquid-cooled cable 22 is spaced apart. In this way, the number of conductors outside the liquid-cooled cable 22 can be adjusted according to actual needs, thereby increasing the leakage detection space by increasing the number and arrangement of conductors.

[0070] Figure 7 This is another schematic diagram illustrating the conductor arrangement of the liquid cooling pipe provided in an embodiment of this application. In one embodiment, as... Figure 7 As shown, the liquid-cooled cable 22 provided in this embodiment includes a liquid-cooling tube 110, a first conductor 120, and a second conductor 130. The first conductor 120 and the second conductor 130 are located outside the liquid-cooling tube. Both the first conductor 120 and the second conductor 130 extend from one end of the liquid-cooled cable 22 in a wound manner to the other end, and the starting directions of the first conductor 120 and the second conductor 130 when they begin to wind from the first end of the liquid-cooling tube differ by 180 degrees. The first end of the first conductor 120 and the first end of the second conductor 130 are both used to connect to the detection circuit 34 within the charging pile 30, and the first conductor 120 and the second conductor 130 are spaced apart.

[0071] In the above manner, when the starting directions of the first conductor 120 and the second conductor 130 are 180 degrees apart when they begin to wind from the first end of the liquid cooling pipe, the first conductor 120 and the second conductor 130 can cover a larger detection space, thereby detecting the leakage problem of the liquid cooling pipe more promptly.

[0072] In one embodiment, the first conductor 120 and the second conductor 130 may also extend to the cooling pool 23, and the first conductor 120 and the second conductor 130 may also refer to Figures 3 to 7 The arrangement is on the surface of the cooling pool 23.

[0073] In one embodiment, the surface of the cooling pool 23 within the charging terminal 21 may also be provided with two conductors independently, similar to the arrangement of the first conductor 120 and the second conductor 130. One conductor is electrically connected to the first conductor 120 via a first connection port, and the other conductor is electrically connected to the second conductor 130 via a second connection port.

[0074] In one embodiment, when the first conductor 120 and the second conductor 130 extend along the length direction of the liquid-cooled cable 22, the first conductor 120 and the second conductor 130 can be referenced Figures 3 to 7 The method of winding other cable surfaces, such as the surface of charging cable 221 or communication cable, can be selected and wrapped around the liquid-cooled cable 22.

[0075] In one embodiment, when the first conductor 120 and the second conductor 130 extend along the length of the liquid-cooled cable 22, the first conductor 120 and the second conductor 130 may also be optionally disposed on the inner wall of the insulating protective layer 222. Specifically, the first conductor 120 and the second conductor 130 may extend directly along the inner wall of the insulating protective layer 222 from one end of the liquid-cooled cable 22 to the other end. Alternatively, the first conductor 120 and the second conductor 130 may also extend along the inner wall of the insulating protective layer 222 in a wound manner from one end of the liquid-cooled cable 22 to the other end.

[0076] Figure 8 This is another schematic diagram of the charging device provided in an embodiment of this application. For example... Figure 8 As shown, in one embodiment, in Figure 2 Based on the combination Figure 5The charging pile 30 in the charging device 10 provided in this application also includes a detection circuit 34, and the power conversion device 31 is connected to the second end of the charging cable 221 in the liquid-cooled cable 22. The first conductor 120 and the second conductor 130 are led out from the detection port of the detection circuit 34 and sequentially wound around the inlet pipe 111, the cooling pool 23, the return pipe 112, and the return port of the cooling medium supply device 32, starting from the outlet of the cooling medium supply device 32. The detection circuit 34 is connected to the first end of the first conductor 120 and the first end of the second conductor 130 in the liquid-cooled cable 22. The charging pile 30 is used to control the power conversion device 31 or the power distribution device to stop supplying power to the charging cable 221 when the detection circuit 34 detects that the resistance value between the first conductor 120 and the second conductor 130 is less than a resistance value threshold.

[0077] Understandable. Figure 8 This application provides only one exemplary real-time method. The number of conductors and the arrangement of conductors in the liquid-cooled cable 22 can also be implemented with reference to any of the embodiments described above.

[0078] In summary, this application provides a liquid-cooled cable, a charging gun, and a charging device, applicable to the field of new energy technology. Specifically, a first conductor 120 and a second conductor 130 are provided outside the liquid-cooled tube within the liquid-cooled cable 22. The first conductor 120 and the second conductor 130 are spaced apart outside the liquid-cooled tube, and both extend along the length of the liquid-cooled cable 22. The first end of the first conductor 120 and the first end of the second conductor 130 are also used to connect to a detection circuit 34 within the charging pile 30. The first conductor 120 and the second conductor 130 are spaced apart. Through this method, leakage detection of the liquid-cooled tube can be achieved by detecting the change in resistance between the first conductor 120 and the second conductor 130.

[0079] In the several embodiments provided in this application, each functional module can be integrated into one device, or each module can exist physically separately, or two or more modules can be integrated into one device.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A liquid-cooled cable, characterized in that, The liquid-cooled cable includes a liquid-cooled pipe, a first conductor, and a second conductor. The first end of the liquid-cooled pipe is used to connect to the cooling medium supply device of the charging pile, and the second end of the liquid-cooled pipe is used to connect to the cooling pool of the charging gun. The first conductor and the second conductor are spaced apart outside the liquid-cooled pipe and both the first conductor and the second conductor extend along the length direction of the liquid-cooled cable. The first end of the first conductor and the first end of the second conductor are also used to connect to the detection circuit in the charging pile.

2. The liquid-cooled cable according to claim 1, characterized in that, The liquid-cooled cable also includes at least one third conductor disposed outside the liquid-cooled pipe. The third conductor extends along the length of the liquid-cooled cable and is spaced apart from the first conductor and the second conductor. The first end of the third conductor is also used to connect to the detection circuit.

3. The liquid-cooled cable according to claim 1 or 2, characterized in that, Both the first conductor and the second conductor are in contact with the surface of the liquid cooling pipe.

4. The liquid-cooled cable according to any one of claims 1-3, characterized in that, Both the first conductor and the second conductor are wound around the outside of the liquid cooling pipe.

5. The liquid-cooled cable according to any one of claims 1-3, characterized in that, The liquid-cooled cable also includes a charging cable and a communication cable, with the first conductor and the second conductor wound around the surface of the charging cable or the surface of the communication cable.

6. A charging gun, characterized in that, The charging gun includes a charging terminal, a cooling pool, and a liquid-cooled cable as described in any one of claims 1-5, wherein the second end of the liquid-cooled tube in the liquid-cooled cable is connected to the cooling pool, and the cooling pool is used to dissipate heat from the charging terminal. The liquid-cooled cable also includes a charging cable. The charging terminal includes a cable connection end and a charging interface end. The charging interface end is used to connect to the charging interface of the electric vehicle. The cable connection end is connected to the first end of the charging cable. The second end of the charging cable is used to connect to the power conversion device in the charging pile.

7. The charging gun according to claim 6, characterized in that, The second ends of the first conductor and the second conductor in the liquid-cooled cable are spaced apart and both contact the surface of the cooling pool.

8. The charging gun according to claim 7, characterized in that, The first conductor and the second conductor are wound around the surface of the cooling pool.

9. A charging device, characterized in that, The charging equipment includes the charging pile and the charging gun according to any one of claims 6-8; the charging pile includes the power conversion device and the detection circuit, the power conversion device is connected to the second end of the charging cable, and the first end of the first conductor and the first end of the second conductor in the liquid-cooled cable are respectively connected to the detection circuit.

10. The charging device according to claim 9, characterized in that, The detection circuit is used to detect the resistance value between the first conductor and the second conductor; The charging pile is used to stop supplying power to the charging cable when the resistance value between the first conductor and the second conductor is less than a resistance value threshold.

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