Liquid cooling charging pile

Abstract

The utility model discloses a liquid cooling charging pile which comprises a charging cabinet, a cable, a charging head, a cooling device and a detection assembly, the cable is connected between the charging cabinet and the charging head, and the cooling device comprises a circulating cooling loop arranged between the charging cabinet and the charging head. The detection assembly comprises at least one of a temperature sensor used for detecting the temperature of the circulating cooling loop and a leakage sensor used for detecting leakage of the circulating cooling loop. According to the liquid cooling charging pile, the temperature sensor and / or the leakage sensor are / is arranged in the liquid cooling charging pile, the temperature of the insulation cooling liquid and / or the leakage problem of the insulation cooling liquid can be detected in real time, it is guaranteed that the charging pile can be effectively cooled, and the safety of the charging pile in the using process can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging piles, and particularly relates to a liquid-cooled charging pile. Background Art

[0002] During the use of charging piles, due to the resistance of wires, a large amount of heat is usually generated. Especially in the fast charging mode, if the heat cannot be discharged in time, it is not only easy to cause the wire temperature to be too high, but also there is a risk of fire. At present, the heat dissipation of charging piles mainly adopts two heat dissipation methods: liquid cooling and air cooling. However, the liquid-cooled charging pile lacks the detection function of the coolant, and cannot detect the temperature of the coolant and the leakage problem in real time, which cannot ensure that the charging pile can be effectively cooled, making the charging pile prone to safety problems due to excessive temperature. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a liquid-cooled charging pile to overcome the problem of low safety of the liquid-cooled charging pile in the prior art.

[0004] To achieve the above technical purpose, the utility model provides a liquid-cooled charging pile, which includes a charging cabinet, a cable, a charging head, a cooling device and a detection component. The cable is connected between the charging cabinet and the charging head. The cooling device includes a circulating cooling circuit arranged between the charging cabinet and the charging head. The detection component includes at least one of a temperature sensor for detecting the temperature of the circulating cooling circuit and a leakage sensor for detecting the leakage of the circulating cooling circuit.

[0005] In one embodiment, the circulating cooling circuit includes an in-cabinet inlet liquid flow channel and an in-cabinet outlet liquid flow channel arranged in the charging cabinet, a head inlet liquid flow channel and a head outlet liquid flow channel arranged in the charging head, and a cable inlet liquid flow channel and a cable outlet liquid flow channel arranged in the cable. One end of the cable inlet liquid flow channel and the cable outlet liquid flow channel is respectively communicated with the in-cabinet inlet liquid flow channel and the in-cabinet outlet liquid flow channel, and the other end of the cable inlet liquid flow channel and the cable outlet liquid flow channel is respectively communicated with the head inlet liquid flow channel and the head outlet liquid flow channel.

[0006] In one embodiment, the temperature sensor includes a first sensor for detecting the inlet liquid temperature arranged in the in-cabinet inlet liquid flow channel and a second sensor for detecting the outlet liquid temperature arranged in the in-cabinet outlet liquid flow channel.

[0007] In one embodiment, the cable includes a plurality of wire cores, a plurality of wire tubes located outside the plurality of wire cores, and an insulating layer wrapped outside the plurality of wire tubes. The cable inlet liquid flow channel and the cable outlet liquid flow channel are formed between the plurality of wire cores and the plurality of wire tubes.

[0008] In one embodiment, the cooling device further includes a junction box disposed within the charging cabinet. The junction box is provided with an in-cabinet liquid inlet channel and an in-cabinet liquid outlet channel. A plurality of the wire cores are disposed through the in-cabinet liquid inlet channel and the in-cabinet liquid outlet channel, and are electrically connected to the input terminals and output terminals of the liquid-cooled charging pile.

[0009] In one embodiment, the cooling device further includes a pile-end liquid inlet nozzle and a pile-end liquid outlet nozzle disposed on the junction box. The pile-end liquid inlet nozzle is provided with a pile-end liquid inlet hole communicating with the in-cabinet liquid inlet channel, and the pile-end liquid outlet nozzle is provided with a pile-end liquid outlet hole communicating with the in-cabinet liquid outlet channel. The temperature sensors are potted within both the pile-end liquid inlet nozzle and the pile-end liquid outlet nozzle.

[0010] In one embodiment, the cooling device further includes an out-of-pile liquid inlet nozzle and an out-of-pile liquid outlet nozzle disposed on the charging cabinet. The out-of-pile liquid inlet nozzle and the out-of-pile liquid outlet nozzle are used to connect to a cooling pump, and a liquid cooling pipe is connected between the out-of-pile liquid inlet nozzle and the pile-end liquid inlet nozzle, and between the out-of-pile liquid outlet nozzle and the pile-end liquid outlet nozzle.

[0011] In one embodiment, the cooling device further includes a cable liquid inlet nozzle and a cable liquid outlet nozzle disposed on the junction box. The cable liquid inlet nozzle is provided with a cable liquid inlet hole communicating the in-cabinet liquid inlet channel and the in-cable liquid inlet channel, and the cable liquid outlet nozzle is provided with a cable liquid outlet hole communicating the in-cable liquid outlet channel and the in-cabinet liquid outlet channel.

[0012] In one embodiment, the detection assembly further includes a liquid collection tank disposed at the bottom of the charging cabinet and below the junction box. The leakage sensor is installed within the liquid collection tank, and the leakage sensor issues a leakage alarm when the volume of leaked liquid exceeds a preset threshold.

[0013] In one embodiment, the circulating cooling circuit includes a positive electrode circulating circuit and a negative electrode circulating circuit. The positive electrode circulating circuit and the negative electrode circulating circuit are independent of each other. The positive electrode circulating circuit includes a positive electrode inlet liquid circuit and a positive electrode outlet liquid circuit, and the positive electrode inlet liquid circuit and the positive electrode outlet liquid circuit are independent of each other. The negative electrode circulating circuit includes a negative electrode inlet liquid circuit and a negative electrode outlet liquid circuit, and the negative electrode inlet liquid circuit and the negative electrode outlet liquid circuit are independent of each other.

[0014] By adopting the above technical solutions, the present utility model has the following beneficial effects:

[0015] By arranging temperature sensors and / or leakage sensors within the liquid-cooled charging pile, the present utility model can detect the temperature of the insulating coolant and / or the leakage problem of the insulating coolant in real time, ensure that the charging pile can be effectively cooled, and is beneficial to improving the safety during the use of the charging pile. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related accompanying drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Structural schematic diagram of a liquid-cooled charging pile provided for an embodiment of the present utility model;

[0018] Figure 2 For Figure 1 Exploded structural schematic diagram of the shown liquid-cooled charging pile;

[0019] Figure 3 For Figure 1 Cross-sectional structural schematic diagram of the shown liquid-cooled charging pile in the A-A direction;

[0020] Figure 4 For Figure 1 Structural schematic diagram of the junction box in the shown liquid-cooled charging pile;

[0021] Figure 5 For Figure 4 Cross-sectional structural schematic diagram of the shown junction box from the same perspective;

[0022] Figure 6 For Figure 2 Structural schematic diagram of the pile-end liquid inlet nozzle, pile-end liquid outlet nozzle and temperature sensor in the shown liquid-cooled charging pile;

[0023] Figure 7 For Figure 2 Structural schematic diagram of the cable liquid inlet nozzle and cable liquid outlet nozzle in the shown liquid-cooled charging pile.

[0024] Explanation of the reference numerals in the drawings:

[0025] 1, charging cabinet; 2, cable; 3, charging head; 4, cooling device; 5, detection component; 6, input terminal; 7, output terminal; 8, input copper bar; 9, output copper bar;

[0026] 11, cabinet body; 12, cover plate;

[0027] 21, wire core; 22, wire tube; 23, insulating layer; 24, internal cable liquid inlet flow channel; 25, internal cable liquid outlet flow channel;

[0028] 41, junction box; 42, pile-end liquid inlet nozzle; 43, pile-end liquid outlet nozzle; 44, external pile liquid inlet nozzle; 45, external pile liquid outlet nozzle; 46, liquid cooling pipe; 47, cable liquid inlet nozzle; 48, cable liquid outlet nozzle; 49, sealing ring;

[0029] 411. Inlet liquid flow path inside the cabinet; 412. Outlet liquid flow path inside the cabinet;

[0030] 421. Liquid inlet hole at the pile end; 422. First abutting flange; 431. Liquid outlet hole at the pile end; 432. Second abutting flange;

[0031] 471. Cable liquid inlet hole; 472. Third abutting flange; 481. Cable liquid outlet hole; 482. Fourth abutting flange;

[0032] 51. Temperature sensor; 51a. First sensor; 51b. Second sensor; 52. Leakage sensor; 53. Liquid collecting tank;

[0033] 531. Liquid collecting groove. Detailed implementation mode

[0034] The following will describe in detail specific embodiments of the present invention in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, unless otherwise clearly defined and limited, terms such as "set", "install", "connect", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0036] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0038] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0039] For a liquid-cooled charging system, the failure of the liquid-cooling system is catastrophic. Without the cooling of the coolant, excessive current will cause the cables to heat up violently, melt or even ignite plastic parts, resulting in a fire and causing property and even life losses.

[0040] Reasons for the failure of the cooling system include coolant leakage and too high or too low coolant temperature. Coolant leakage will cause the flow rate of the cooling system to become smaller or even the coolant to be missing, and the heat of the wire cannot be taken away sufficiently, resulting in too high a temperature of the cooling system. Too high coolant temperature will affect the operation of other system components and may even cause coolant vapor to be generated in the pipeline, forming high pressure and damaging the cooling system. Too low coolant temperature may cause the coolant to become viscous or even freeze and unable to flow.

[0041] In order to use the liquid-cooled charging system safely, it is necessary to monitor the coolant leakage and / or coolant temperature.

[0042] Please refer to Figure 1 and Figure 2 , in order to use the liquid-cooled charging system safely, an embodiment of the present utility model provides a liquid-cooled charging pile, which includes a charging cabinet 1, a cable 2, a charging head 3, a cooling device 4 and a detection component 5. Among them, the cable 2 is connected between the charging cabinet 1 and the charging head 3, the cooling device 4 is arranged in the charging cabinet 1, the cable 2 and the charging head 3, and the detection component 5 is arranged in the charging cabinet 1 for detecting the temperature and / or leakage of the cooling device 4.

[0043] Overall, the charging cabinet 1 is generally in a cuboid structure, which includes a cabinet body 11 and a cover plate 12 installed on one side of the cabinet body 11. Among them, a receiving space for accommodating a part of the cooling device 4 is opened in the cabinet body 11, and the opening of the receiving space faces the cover plate 12. In this embodiment, the cover plate 12 is arranged at the rear side (the side away from the user) of the cabinet body 11. Correspondingly, the opening of the receiving space also faces the rear side of the cabinet body 11.

[0044] To ensure effective cooling during the use of the charging pile, the cooling device 4 includes a circulating cooling circuit disposed between the charging cabinet 1 and the charging head 3. The detection assembly 5 includes at least one of a temperature sensor 51 for detecting the temperature of the circulating cooling circuit and a leakage sensor 52 for detecting leakage in the circulating cooling circuit. Thus, when injecting insulating coolant into the circulating cooling circuit for liquid cooling heat dissipation, since the temperature sensor 51 and / or the leakage sensor 52 are provided in the charging pile, when the temperature difference between the insulating coolant and the ambient temperature or the preset temperature threshold is large, the charging pile or the staff can timely adjust the charging power of the charging pile or even stop charging according to the temperature change of the insulating coolant to avoid damaging other components due to too high or too low temperature of the insulating coolant; when there is leakage of the insulating coolant, the charging pile can timely remind the staff to maintain the charging pile to reduce the risk of cooling failure and even fire caused by the leakage of the insulating coolant. It should be noted that the insulating coolant mentioned here can refer to coolants such as silicone oil, electronic fluorinated liquid, perfluoropolyether grease, perfluoropolyether lubricating oil, etc. The temperature sensor 51 can be a bimetallic thermometer, a pressure thermometer, a resistance thermometer and other sensors capable of detecting temperature changes, and the leakage sensor 52 can be a float sensor and other sensors capable of detecting changes in liquid level height.

[0045] As Figures 3 to 5 shown, the circulating cooling circuit includes an in-cabinet inlet flow channel 411 and an in-cabinet outlet flow channel 412 disposed in the charging cabinet 1, a head inlet flow channel and a head outlet flow channel (not shown in the figure) disposed in the charging head 3, and a cable inlet flow channel 24 and a cable outlet flow channel 25 disposed in the cable 2. Among them, one ends of the cable inlet flow channel 24 and the cable outlet flow channel 25 are respectively communicated with the in-cabinet inlet flow channel 411 and the in-cabinet outlet flow channel 412, and the other ends of the cable inlet flow channel 24 and the cable outlet flow channel 25 are respectively communicated with the head inlet flow channel and the head outlet flow channel, so that the insulating coolant can flow in the circulating circuit.

[0046] It should be noted that in order to obtain the comprehensive temperature of the insulating coolant, the temperature sensor 51 includes a first sensor 51a and a second sensor 51b. Among them, the first sensor 51a is disposed in the in-cabinet inlet flow channel 411 for detecting the inlet temperature of the insulating coolant, and the second sensor 51b is disposed in the in-cabinet outlet flow channel 412 for detecting the outlet temperature of the insulating coolant. In this way, when the inlet temperature or the outlet temperature of the insulating coolant is significantly different from the ambient temperature or the corresponding temperature threshold, it is convenient to timely notify the staff to solve the safety problems caused by the overheating of the charging pile.

[0047] In this embodiment, the cable 2 includes a plurality of wire cores 21, a plurality of wire tubes 22 wrapped around the plurality of wire cores 21, and an insulating layer 23 wrapped around the plurality of wire tubes 22, wherein the cable inlet flow channel 24 and the cable outlet flow channel 25 are formed between the plurality of wire cores 21 and the plurality of wire tubes 22. It should be noted that, in order to enable the insulating coolant to flow in the above-mentioned circulating cooling loop, preferably, the number of wire cores 21 and wire tubes 22 is an even number. In this embodiment, the number of wire cores 21 and wire tubes 22 is four, and two cable inlet flow channels 24 and two cable outlet flow channels 25 are formed between the four wire cores 21 and the four wire tubes 22. It is worth mentioning that two of the four cores 21 are connected to the positive electrode, and the two cores 21 are used to carry the input current of the positive electrode and to form a single-input and single-output positive electrode circulation loop; the remaining two cores 21 are connected to the negative electrode, and the remaining two cores 21 are used to carry the output current to the negative electrode and to form a single-input and single-output negative electrode circulation loop, that is, the positive and negative electrodes of the charging pile have their own independent circulation cooling loops. Specifically, the positive electrode circulation loop includes a mutually independent positive electrode liquid inlet loop and a positive electrode liquid outlet loop, such as a cable inlet flow channel 24 and a cable inlet flow channel 25; the negative electrode circulation loop includes a mutually independent negative electrode liquid inlet loop and a negative electrode liquid outlet loop, such as another cable inlet flow channel 24 and another cable inlet flow channel 25. This arrangement enables the core 21 to be completely immersed in the insulating coolant in the cable inlet flow channel 24 and the cable inlet flow channel 25, so that the insulating coolant can directly take away the heat generated by the core 21, and the cooling efficiency is higher. The circulating cooling circuit is described below.

[0048] like Figure 2 , Figure 4 and Figure 5As shown in the figure, the cooling device 4 further includes a junction box 41 provided in the charging cabinet 1. The junction box 41 is provided with the above-mentioned liquid inlet flow channel 411 and liquid outlet flow channel 412 in the cabinet. In this embodiment, the number of junction boxes 41 is two. The structures of the liquid inlet flow channel 411 and the liquid outlet flow channel 412 in each junction box 41 are similar to a T-shaped three-way joint. That is to say, the liquid inlet flow channel 411 and the liquid outlet flow channel 412 in each junction box 41 each have three ports. Two of the three ports can respectively insert the wire core 21 and the input terminal 6 or output terminal 7 of the liquid-cooled charging pile. The input terminal 6 is used to connect the input copper bar 8 of the charging pile, and the output terminal 7 is used to connect the output copper bar 9 of the charging pile. The wire core 21 can be connected to the corresponding input terminal 6 or output terminal 7 to transmit the power provided by the charging cabinet 1 to the charging head 3. In some embodiments, the number of input terminals 6 and output terminals 7 can be multiple. In this embodiment, the number of both the input terminals 6 and the output terminals 7 is two. The two input terminals 6 and the two output terminals 7 are respectively inserted into the ports at the top of the corresponding liquid inlet flow channel 411 and liquid outlet flow channel 412 in the cabinet. Correspondingly, a wire core 21 is respectively inserted into the ports at the bottom of the liquid inlet flow channel 411 and the liquid outlet flow channel 412 in the cabinet. The two wire cores 21 are respectively electrically connected to the corresponding input terminal 6 or output terminal 7.

[0049] Furthermore, in order to prevent the leakage of the insulating coolant from the ports of the junction box 41 under the hydraulic action, the cooling device 4 further includes a sealing ring 49. The sealing ring 49 is provided at each port of the liquid inlet flow channel 411 and the liquid outlet flow channel 412 in the cabinet, which can avoid the situation of cooling failure caused by the leakage of the insulating coolant.

[0050] As Figure 6As shown in the figure, in order to facilitate the injection and extraction of the insulating coolant into and from the circulating cooling circuit, the cooling device 4 further includes a pile-end liquid inlet nozzle 42 and a pile-end liquid outlet nozzle 43 provided on one side of the junction box 41. Specifically, the pile-end liquid inlet nozzle 42 and the pile-end liquid outlet nozzle 43 are respectively inserted into the middle ports of the in-cabinet liquid inlet flow channel 411 and the in-cabinet liquid outlet flow channel 412. It should be noted that the structures of the pile-end liquid inlet nozzle 42 and the pile-end liquid outlet nozzle 43 also have three openings due to their similarity to a T-shaped three-way joint. The middle opening among these three openings is used to connect the middle ports of the in-cabinet liquid inlet flow channel 411 and the in-cabinet liquid outlet flow channel 412. The bottom opening among these three openings is called the pile-end liquid inlet hole 421 or the pile-end liquid outlet hole 431. The pile-end liquid inlet hole 421 is used to communicate with the in-cabinet liquid inlet flow channel 411, and the pile-end liquid outlet hole 431 is used to communicate with the in-cabinet liquid outlet flow channel 412. The above temperature sensor 51 is potted in the top opening among these three openings. Specifically, the first sensor 51a for measuring the inlet liquid temperature is potted in the top opening of the pile-end liquid inlet nozzle 42, and the second sensor 51b for measuring the outlet liquid temperature is potted in the top opening of the pile-end liquid outlet nozzle 43. In this way, it is convenient to measure the inlet liquid temperature and the outlet liquid temperature of the insulating coolant.

[0051] Furthermore, in order to limit the installation depths of the pile-end liquid inlet nozzle 42 and the pile-end liquid outlet nozzle 43 in the corresponding in-cabinet liquid inlet flow channel 411 and in-cabinet liquid outlet flow channel 412, the pile-end liquid inlet nozzle 42 includes a first abutting flange 422, and the pile-end liquid outlet nozzle 43 includes a second abutting flange 432. The first abutting flange 422 is used to abut against the edge of the middle port of the in-cabinet liquid inlet flow channel 411 to limit the installation depth of the pile-end liquid inlet nozzle 42; the second abutting flange 432 is used to abut against the edge of the middle port of the in-cabinet liquid outlet flow channel 412 to limit the installation depth of the pile-end liquid outlet nozzle 43.

[0052] In some embodiments, the numbers of the pile-end liquid inlet nozzle 42 and the pile-end liquid outlet nozzle 43 can both be multiple. In this embodiment, the numbers of the pile-end liquid inlet nozzle 42 and the pile-end liquid outlet nozzle 43 are both two. These two pile-end liquid inlet nozzles 42 are used to inject the insulating coolant into the corresponding in-cabinet liquid inlet flow channel 411, and these two pile-end liquid outlet nozzles 43 are used to extract the insulating coolant from the corresponding in-cabinet liquid outlet flow channel 412.

[0053] Furthermore, as Figure 2 shown, in order to ensure that the insulating coolant outside the charging pile can be injected into the charging pile under the drive of the cooling pump, the cooling device 4 further includes a pile-outside liquid inlet nozzle 44 and a pile-outside liquid outlet nozzle 45 provided on the charging cabinet 1, and a liquid cooling pipe 46 communicating with the pile-outside liquid inlet nozzle 44 and the pile-outside liquid outlet nozzle 45. These liquid cooling pipes 46 are connected between the pile-outside liquid inlet nozzle 44 and the corresponding pile-end liquid inlet nozzle 42, and between the pile-outside liquid outlet nozzle 45 and the corresponding pile-end liquid outlet nozzle 43.

[0054] In some embodiments, the number of the external pile liquid inlet nozzles 44 and the external pile liquid nozzles 45 can be multiple. In the present embodiment, the number of the external pile liquid inlet nozzles 44 and the external pile liquid nozzles 45 are both two. The two external pile liquid inlet nozzles 44 are respectively connected to the liquid outlet of a cooling pump, and are respectively used to inject insulating coolant into the corresponding pile end liquid inlet nozzles 42 of the positive electrode circulation loop and the negative electrode circulation loop. The two external pile liquid nozzles 45 are respectively connected to the liquid inlet of the corresponding cooling pump, and are respectively used to extract the insulating coolant in the pile end liquid outlet nozzles 43 of the positive electrode circulation loop and the negative electrode circulation loop.

[0055] like Figure 7 As shown, in order to allow the insulating coolant to flow into the cable inlet channel 24 and out of the cable outlet channel 25, the cooling device 4 also includes a cable inlet nozzle 47 and a cable outlet nozzle 48 arranged at the bottom of the junction box 41. The cable inlet nozzle 47 is columnar and has a cable inlet hole 471 connected to the inlet channel 411 in the cabinet; the cable outlet nozzle 48 is also columnar and has a cable outlet hole 481 connected to the outlet channel 412 in the cabinet. The wire tube 22 of the cable 2 can be sleeved on the outer surface of the end extending downward on the cable inlet nozzle 47 and the cable outlet nozzle 48, and the corresponding wire core 21 can pass through the cable inlet nozzle 47 and the cable outlet nozzle 48 and enter the inlet channel 411 and the outlet channel 412 in the cabinet, and then connect to the corresponding input terminal 6 or output terminal 7. In this way, it is convenient for the insulating coolant in the cable 2 to be injected into and discharged from the cooling device 4, and directly take away the heat generated by multiple wire cores 21.

[0056] Furthermore, in order to respectively limit the installation depths of the cable liquid inlet nozzle 47 and the cable liquid outlet nozzle 48 in the inlet flow channel 411 and the outlet flow channel 412 in the cabinet, the cable liquid inlet nozzle 47 includes a third abutting flange 472, and the cable liquid outlet nozzle 48 includes a fourth abutting flange 482. The third abutting flange 472 is used to abut against the edge of the bottom end port of the inlet flow channel 411 in the cabinet to limit the installation depth of the cable liquid inlet nozzle 47; the fourth abutting flange 482 is used to abut against the edge of the bottom end port of the outlet flow channel 412 in the cabinet to limit the installation depth of the cable liquid outlet nozzle 48.

[0057] In some embodiments, the number of cable liquid inlet nozzles 47 and cable liquid outlet nozzles 48 can be multiple. In the present embodiment, the number of cable liquid inlet nozzles 47 and cable liquid outlet nozzles 48 are both two. The two cable liquid inlet nozzles 47 are used to inject insulating coolant into the cable liquid inlet channel 24 of the positive electrode circulation loop and the negative electrode circulation loop, and the two cable liquid outlet nozzles 48 are used to discharge the insulating coolant in the cable liquid outlet channel 25 of the positive electrode circulation loop and the negative electrode circulation loop.

[0058] In this embodiment, considering the collection of leaked insulating coolant, the detection assembly 5 further includes a liquid collection tank 53 installed at the bottom of the charging cabinet 1, and the leakage sensor 52 is installed in the liquid collection tank 53. In a specific embodiment of the present utility model, the liquid collection tank 53 is arranged below the junction box 41, and a support structure is provided in the liquid collection tank 53, such as a stepped surface formed on the side wall of the liquid collection tank 53, a support column arranged in the middle of the liquid collection tank 53, etc., to ensure a certain distance between the bottom of the junction box 41 and the bottom of the liquid collection tank 53. In order to facilitate the accommodation of leaked insulating coolant, a liquid collection groove 531 with an upward opening is formed in the liquid collection tank 53. In this way, when the insulating coolant in the charging pile leaks, the liquid collection tank 53 can collect the leaked liquid, facilitating the leakage sensor 52 to issue a leakage alarm when the volume of the leaked liquid exceeds a preset threshold.

[0059] Further, considering the reduction of the frictional force of the leaked liquid flowing in the liquid collection tank 53, the angle between the bottom surface of the liquid collection tank 53 and the horizontal plane is an acute angle, that is, the bottom of the liquid collection tank 53 forms a funnel shape, which is beneficial to the rapid collection of the leaked liquid in the liquid collection tank 53, so that the staff can timely discover the leakage and maintain the charging pile.

[0060] To facilitate the understanding of the present utility model, its general assembly process is briefly described below:

[0061] First, pass multiple wire cores 21 and multiple wire tubes 22 of the cable 2 through the through holes at the bottom of the liquid collecting tank 53 and make a sealed fit with the liquid collecting tank 53. Then, insert the bottoms of multiple cable liquid inlet nozzles 47 and multiple cable liquid outlet nozzles 48 into the corresponding wire tubes 22, and let the wire cores 21 pass through the corresponding cable liquid inlet nozzles 47 and cable liquid outlet nozzles 48. Then, use ultrasonic welding to weld multiple wire cores 21 to the input terminal 6 and the output terminal 7 of the charging pile together. Next, insert the welded input terminal 6 and output terminal 7 into the cabinet internal liquid inlet flow channel 411 and the cabinet internal liquid outlet flow channel 412 from the bottom ports of the cabinet internal liquid inlet flow channel 411 and the cabinet internal liquid outlet flow channel 412, and let them pass out from the top ports of the cabinet internal liquid inlet flow channel 411 and the cabinet internal liquid outlet flow channel 412. After sealing the corresponding ports, fix the cable liquid inlet nozzles 47 and cable liquid outlet nozzles 48 to the bottom ports of the cabinet internal liquid inlet flow channel 411 and the cabinet internal liquid outlet flow channel 412 with screws, and fix the pile end liquid inlet nozzle 42 and the pile end liquid outlet nozzle 43 to the middle ports of the cabinet internal liquid inlet flow channel 411 and the cabinet internal liquid outlet flow channel 412 with screws. Then, fix the external pile liquid inlet nozzle 44 and the external pile liquid outlet nozzle 45 to the cabinet body 11 of the charging cabinet 1 with a fixing seat, and connect the external pile liquid inlet nozzle 44 to the pile end liquid inlet nozzle 42 and the external pile liquid outlet nozzle 45 to the pile end liquid outlet nozzle 43 with a liquid cooling pipe 46. Next, fix the junction box 41 inside the cabinet body 11 of the charging cabinet 1 and connect the input copper bar 8 and the output copper bar 9 corresponding to the input terminal 6 and the output terminal 7. Finally, cover the cover plate 12 and connect the cooling pump to complete the assembly of the entire liquid-cooled charging pile. It should be noted that temperature sensors 51 are pre-encapsulated in the pile end liquid inlet nozzle 42 and the pile end liquid outlet nozzle 43, and a leakage sensor 52 is pre-installed in the liquid collecting tank 53.

[0062] Compared with the prior art, the present utility model has the following beneficial effects:

[0063] By providing temperature sensors and / or leakage sensors in the liquid-cooled charging pile, the present utility model can detect the temperature of the insulating coolant and / or the leakage problem of the insulating coolant in real time, ensure that the charging pile can be effectively cooled, and is beneficial to improving the safety during the use of the charging pile.

[0064] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. A liquid-cooled charging pile, characterized in that, It includes a charging cabinet (1), a cable (2), a charging head (3), a cooling device (4) and a detection component (5). The cable (2) is connected between the charging cabinet (1) and the charging head (3). The cooling device (4) includes a circulating cooling circuit arranged between the charging cabinet (1) and the charging head (3). The detection component (5) includes a temperature sensor (51) for detecting the temperature of the circulating cooling circuit and a leakage sensor (52) for detecting the leakage of the circulating cooling circuit.

2. The liquid-cooled charging pile according to claim 1, characterized in that, The circulating cooling circuit includes an in-cabinet liquid inlet channel (411) and an in-cabinet liquid outlet channel (412) arranged in the charging cabinet (1), a head-inlet liquid channel and a head-outlet liquid channel arranged in the charging head (3), and a cable-inlet liquid channel (24) and a cable-outlet liquid channel (25) arranged in the cable (2). One ends of the cable-inlet liquid channel (24) and the cable-outlet liquid channel (25) are respectively communicated with the in-cabinet liquid inlet channel (411) and the in-cabinet liquid outlet channel (412), and the other ends of the cable-inlet liquid channel (24) and the cable-outlet liquid channel (25) are respectively communicated with the head-inlet liquid channel and the head-outlet liquid channel.

3. The liquid-cooled charging pile according to claim 2, characterized in that, The temperature sensor (51) includes a first sensor (51a) arranged in the in-cabinet liquid inlet channel (411) for detecting the inlet liquid temperature and a second sensor (51b) arranged in the in-cabinet liquid outlet channel (412) for detecting the outlet liquid temperature.

4. The liquid-cooled charging pile according to claim 2, wherein, The cable (2) includes a plurality of wire cores (21), a plurality of wire tubes (22) located outside the plurality of wire cores (21), and an insulating layer (23) wrapped outside the plurality of wire tubes (22). The cable-inlet liquid channel (24) and the cable-outlet liquid channel (25) are formed between the plurality of wire cores (21) and the plurality of wire tubes (22).

5. The liquid-cooled charging pile according to claim 4, wherein, The cooling device (4) further includes a junction box (41) arranged in the charging cabinet (1). The in-cabinet liquid inlet channel (411) and the in-cabinet liquid outlet channel (412) are arranged in the junction box (41). The plurality of wire cores (21) are arranged in the in-cabinet liquid inlet channel (411) and the in-cabinet liquid outlet channel (412) and are electrically connected to the input terminal (6) and the output terminal (7) of the liquid-cooled charging pile.

6. The liquid-cooled charging pile according to claim 5, characterized in that, The cooling device (4) further includes a pile-end liquid inlet nozzle (42) and a pile-end liquid outlet nozzle (43) arranged on the junction box (41). The pile-end liquid inlet nozzle (42) is provided with a pile-end liquid inlet hole (421) communicated with the in-cabinet liquid inlet channel (411), the pile-end liquid outlet nozzle (43) is provided with a pile-end liquid outlet hole (431) communicated with the in-cabinet liquid outlet channel (412), and the temperature sensor (51) is potted in both the pile-end liquid inlet nozzle (42) and the pile-end liquid outlet nozzle (43).

7. The liquid-cooled charging pile according to claim 6, characterized in that, The cooling device (4) further includes an external charging pile liquid inlet nozzle (44) and an external charging pile liquid outlet nozzle (45) provided on the charging cabinet (1). The external charging pile liquid inlet nozzle (44) and the external charging pile liquid outlet nozzle (45) are used to connect a cooling pump, and a liquid cooling pipe (46) is connected between the external charging pile liquid inlet nozzle (44) and the charging pile end liquid inlet nozzle (42), and between the external charging pile liquid outlet nozzle (45) and the charging pile end liquid outlet nozzle (43).

8. The liquid-cooled charging pile according to claim 5, wherein The cooling device (4) further includes a cable liquid inlet nozzle (47) and a cable liquid outlet nozzle (48) provided on the junction box (41). The cable liquid inlet nozzle (47) is provided with a cable liquid inlet hole (471) connecting the liquid inlet flow path (411) inside the cabinet and the liquid inlet flow path (24) inside the cable. The cable liquid outlet nozzle (48) is provided with a cable liquid outlet hole (481) connecting the liquid outlet flow path (25) inside the cable and the liquid outlet flow path (412) inside the cabinet.

9. The liquid-cooled charging pile according to claim 5, wherein, The detection assembly (5) further includes a liquid collection tank (53) provided at the bottom of the charging cabinet (1) and below the junction box (41). The leakage sensor (52) is installed in the liquid collection tank (53), and the leakage sensor (52) issues a leakage alarm when the volume of leaked liquid exceeds a preset threshold.

10. The liquid-cooled charging pile according to claim 2, wherein, The circulating cooling loop includes a positive electrode circulating loop and a negative electrode circulating loop. The positive electrode circulating loop and the negative electrode circulating loop are independent of each other. The positive electrode circulating loop includes a positive electrode liquid inlet loop and a positive electrode liquid outlet loop, and the positive electrode liquid inlet loop and the positive electrode liquid outlet loop are independent of each other. The negative electrode circulating loop includes a negative electrode liquid inlet loop and a negative electrode liquid outlet loop, and the negative electrode liquid inlet loop and the negative electrode liquid outlet loop are independent of each other.

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