Liquid cooling charging pile

Abstract

The utility model provides a liquid cooling charging pile which comprises a charging gun and a cooling liquid circulation pipeline, the cooling liquid circulation pipeline comprises a first radiator, a first pipeline section and a second pipeline section, the first radiator is connected between the first pipeline section and the second pipeline section, and the second radiator is connected between the first pipeline section and the second pipeline section. The first pipeline section and the second pipeline section are respectively communicated with a cooling part of the charging gun; the first pipeline section comprises a water inlet distributor, a first water tank and a first water pump arranged behind the first water tank in the cooling liquid flowing direction. The second pipeline section comprises a water return distributor, a second water tank and a second water pump arranged behind the second water tank in the cooling liquid flowing direction. Through segmented design of the circulating pipeline, corresponding structures such as the water pump, the water tank and the water segregator are arranged in different pipeline sections, so that the water pump with low working pressure can be adopted to drive cooling liquid, the pressure of all parts in the pipeline can be better adjusted, and the cooling efficiency is improved. And the risk of leakage caused by excessive pressure at the pipeline joint is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of new energy technology, and in particular relates to a liquid-cooled charging pile. Background Technology

[0002] With the continuous advancement of new energy technologies, charging guns and their cables are becoming increasingly smaller to meet the supercharging demands of new energy vehicles. Liquid-cooled charging gun cables are much thinner than those of conventional air-cooled guns, and the corresponding internal cooling pipes are also thinner. This presents a problem: when the charging gun cable is long, the power mechanism in the liquid-cooled circulation pipeline requires a long section of cooling pipe to account for resistance losses. Furthermore, other functional components in the circulation pipeline also generate water resistance. The outlet pressure of the power mechanism is typically very high, and excessive pressure can easily impact the pipe connection joints, even damaging the joints and leading to coolant leaks. Utility Model Content

[0003] The technical objective of this invention is to provide a liquid-cooled charging pile, which aims to solve the problem that the reliability of the coolant circulation pipeline needs to be improved in related technologies.

[0004] To solve the above-mentioned technical problems, this utility model is implemented as follows: a liquid-cooled charging pile includes a charging gun and a coolant circulation pipeline. The coolant circulation pipeline includes a first radiator, a first pipeline section, and a second pipeline section. The first radiator is connected between the first pipeline section and the second pipeline section, and the first pipeline section and the second pipeline section are respectively connected to the cooling part of the charging gun. The first pipeline section includes an inlet water distributor, a first water tank, and a first water pump disposed after the first water tank along the coolant flow direction. The second pipeline section includes a return water distributor, a second water tank, and a second water pump disposed after the second water tank along the coolant flow direction.

[0005] If the first water tank is an open water tank and the second water tank is a closed water tank, or both the first and second water tanks are open water tanks; or both the first and second water tanks are closed water tanks, then the first water tank is higher than the second water tank in the height direction.

[0006] If the first water tank is a closed water tank and the second water tank is an open water tank, then the first water tank is lower than the second water tank in terms of height.

[0007] Furthermore, a first fan is also installed on one side of the first radiator.

[0008] Furthermore, the coolant circulation pipeline also includes a second radiator; the liquid-cooled charging pile also includes a cabinet, a charging pile host installed inside the cabinet, and a charging gun cable connecting the charging pile host and the charging gun. The second radiator is installed inside the cabinet, and the first radiator is installed outside the cabinet.

[0009] Furthermore, a second fan is installed inside the cabinet, which is mounted on one side of the second radiator.

[0010] Furthermore, it also includes a humidity sensor installed inside the cabinet.

[0011] Furthermore, it also includes a temperature sensor, and at least one of the following is provided: the charging gun head, the charging gun tail, the water inlet water dispenser, the water return water dispenser, the first heat sink, and the second heat sink.

[0012] Furthermore, the coolant circulation pipeline also includes a plate heat exchanger, and the liquid-cooled charging pile also includes an external circulation cooling device, which is used to remove heat from the plate heat exchanger.

[0013] Furthermore, the external circulation cooling device is either a Freon phase change circulation device or a water chiller circulation cooling device.

[0014] Furthermore, it also includes a filter, which is disposed between the second water pump and the first radiator.

[0015] Furthermore, both the first and second water pumps are centrifugal pumps; or, of the first and second water pumps, one is a centrifugal pump and the other is a vane pump or a gear pump.

[0016] Compared with the prior art, the liquid-cooled charging pile of this utility model has the following advantages: it adopts a segmented design to construct the coolant circulation pipeline and sets up multiple water pumps to provide power to different pipeline sections, thereby controlling the water pump outlet pressure to a lower level, reducing the risk of coolant leakage in the connecting pipeline, and also reducing the noise of the coolant circulation pipeline; in addition, this application also sets inlet water distributors and return water distributors on the first pipeline section and the second pipeline section respectively. The inlet water distributors and return water distributors can be used to distribute the flow, ensuring stable circulation of coolant in the circulation pipeline, while also improving the safety and reliability of the circulation pipeline. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the liquid-cooled charging pile in the first implementation of this utility model embodiment;

[0018] Figure 2 This is a schematic diagram of the overall structure of the liquid-cooled charging pile in the second implementation of this utility model embodiment;

[0019] Figure 3 This is a schematic diagram of the overall structure of the liquid-cooled charging pile in the third implementation of this utility model embodiment;

[0020] Figure 4 This is a schematic diagram of the overall structure of the liquid-cooled charging pile in the fourth implementation of this utility model embodiment;

[0021] Figure 5 This utility model embodiment includes a schematic diagram of a liquid-cooled charging pile equipped with multiple fans and multiple radiators.

[0022] Figure 6 This utility model embodiment shows the working diagram of multiple fans and multiple radiators in a liquid-cooled charging pile.

[0023] Figure 7 This utility model embodiment is a schematic diagram of a liquid-cooled charging pile equipped with a plate heat exchanger and an external circulation cooling device.

[0024] In the accompanying drawings, the reference numerals represent: 1. Charging gun; 2. First radiator; 3. Inlet water separator; 4. First water tank; 5. First water pump; 6. Return water separator; 7. Second water tank; 8. Second water pump; 9. Filter; 10. First fan; 11. Second radiator; 12. Second fan; 13. Plate heat exchanger; 14. External circulation cooling device; 15. Turbulence fan. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Example:

[0029] like Figure 1-6 As shown, in this embodiment, the liquid-cooled charging pile includes a charging gun 1 and a coolant circulation pipeline. The coolant circulation pipeline includes a first radiator 2, a first pipeline section, and a second pipeline section. The first radiator 2 is connected between the first pipeline section and the second pipeline section, and the first pipeline section and the second pipeline section are respectively connected to the cooling part of the charging gun 1. The first pipeline section includes an inlet water distributor 3, a first water tank 4, and a first water pump 5 disposed after the first water tank 4 along the coolant flow direction. The second pipeline section includes a return water distributor 6, a second water tank 7, and a second water pump 8 disposed after the second water tank 7 along the coolant flow direction. If the first water tank 4 is an open water tank and the second water tank 7 is a closed water tank, or both the first water tank 4 and the second water tank 7 are open water tanks; or both the first water tank 4 and the second water tank 7 are closed water tanks, then the first water tank 4 is higher than the second water tank 7 in the height direction. If the first water tank 4 is a closed water tank and the second water tank 7 is an open water tank, then the first water tank 4 is lower than the second water tank 7 in the height direction.

[0030] Specifically, a segmented design is adopted for the coolant circulation pipeline, with multiple water pumps providing power to different pipeline sections. This allows for lower pressure control at the pump outlets, reducing the risk of coolant leakage in the connecting pipelines and also reducing noise in the coolant circulation pipeline. Furthermore, this embodiment includes inlet water distributors 3 and return water distributors 6 on the first and second pipeline sections, respectively. These distributors can be used for flow distribution, ensuring stable coolant circulation while improving the safety and reliability of the circulation pipeline. The distributors can be connected to one or more charging guns 1. In some more specific embodiments, multiple branches can be provided in the coolant circulation pipeline, each branch cooling different charging guns 1. That is, the inlet water distributor 3 and return water distributor 6 can be connected to multiple branches, and the flow rate of each branch can be evenly distributed. Pressure sensors and temperature sensors can also be installed on the inlet water separator 3 and the return water separator 6 to monitor the pressure or temperature status of the corresponding pipeline.

[0031] In the coolant circulation pipeline of this embodiment, the coolant flows sequentially through: first radiator 2 → first water tank 4 → first water pump 5 → inlet water separator 3 → charging gun 1 → return water separator 6 → second water tank 7 → second water pump 8 → first radiator 2; the components are connected by pipelines to form a complete cycle. The first radiator 2 can exchange heat with the coolant to cool it. The water tank in this embodiment can refer to an open water tank or a closed water tank, and there are multiple ways to set up the water tank in this embodiment; in the first implementation, such as Figure 1 As shown, the first water tank 4 is a closed water tank, not connected to the atmosphere; the second water tank 7 is an open water tank, with its lid connected to the atmosphere; the second water tank 7 is positioned higher than the first water tank 4, meaning the lowest liquid level in the second water tank 7 is higher than the highest liquid level in the first water tank 4. In the second implementation, as... Figure 2 As shown, the first water tank 4 is an open water tank with its lid open to the atmosphere, while the second water tank 7 is a completely closed water tank, not open to the atmosphere; the position of the first water tank 4 must be higher than the position of the second water tank 7. In the third implementation method, as... Figure 3 As shown, both the first water tank 4 and the second water tank 7 are open water tanks, with their lids completely open to the atmosphere. In the fourth implementation method, as... Figure 4 As shown, both water tanks are completely enclosed. Preferably, when the first or fourth implementation method is adopted, the second water pump 8 and the first water pump 5 can serve as backups for each other. That is, even if one of the second water pump 8 and the first water pump 5 fails, the other water pump can still continue to maintain the operation of the liquid cooling circulation pipeline, which greatly improves the reliability of the charging pile.

[0032] In this embodiment, a filter 9 is also included, which is disposed between the second water pump 8 and the first radiator 2. Specifically, the filter 9 can be a Y-type filter 9, which can filter impurities in the pipe, thereby preventing pipe blockage. In this embodiment, both the first water pump 5 and the second water pump 8 are centrifugal water pumps. Preferably, the first water pump 5 and the second water pump 8 are vehicle-mounted electronic centrifugal water pumps, which have advantages such as low cost, easy miniaturization, wide operating temperature range, and IP67 rating. It is understood that in some other embodiments, the first water pump 5 and the second water pump 8 can also be vane pumps, magnetic pumps, gear pumps, etc., or one of the first water pump 5 and the second water pump 8 can be a vehicle-mounted electronic centrifugal water pump, and the other can be a vane pump, magnetic pump, gear pump, etc., which is not limited here. In this embodiment, along the water flow direction, the second water pump 8 can overcome the water resistance (denoted as H1) between the second water tank 7 and the first water tank 4, and the first water pump 5 can overcome the water resistance (denoted as H2) between the first water tank 4 and the second water tank 7. By implementing segmented control in this way, a first radiator 2 with a smaller aperture and a longer heat transfer tube can be used, along with a Y-type filter 9 with a smaller filter aperture. This design improves both the heat dissipation capacity of the first radiator 2 and the filtration capacity of the filter 9, while also meeting the user's need for compact operation. In some specific embodiments, H1 ≤ H2 can be achieved by adjusting the aperture and length of the heat transfer tubes of the first radiator 2 and the aperture of the filter mesh of the Y-type filter 9. When the operating state of the coolant circulation pipeline satisfies H1 = H2, the operational benefits can be maximized. It should be noted that when H1 = H2, the second water pump 8 and the first water pump 5 can be selected as the same model of water pump.

[0033] like Figure 5 As shown, in this embodiment, a first fan 10 is also provided on one side of the first radiator 2. The airflow speed around the first radiator 2 is increased by the airflow of the first fan 10, thereby improving the heat dissipation efficiency, that is, improving the cooling efficiency of the coolant.

[0034] Furthermore, such as Figure 5 and 6 As shown, in some embodiments of this example, the coolant circulation pipeline further includes a second radiator 11; the liquid-cooled charging pile also includes a cabinet, a charging pile host installed in the cabinet, and a charging gun line connecting the charging pile host and the charging gun 1. The second radiator 11 is installed in the cabinet, and the first radiator 2 is installed outside the cabinet.

[0035] Specifically, the second heat sink 11 is installed inside the cabinet, allowing it to exchange heat with the hot air inside the charging pile host (charging terminal) and remove heat generated by the components inside the cabinet via coolant, thus cooling the components of the charging pile. In this embodiment, the first heat sink 2 is in direct contact with the atmosphere and is cooled by forced convection cooling via the first fan 10, transferring heat to the atmosphere. That is, the coolant circulation pipeline in this embodiment can not only dissipate heat from the charging gun 1, but also from the heat-generating components inside the charging terminal.

[0036] In this embodiment, as Figure 5 and 6 As shown, a second fan 12 is also installed inside the cabinet, mounted on one side of the second radiator 11. The second radiator 11 is installed inside the charging pile and is not in direct contact with the atmosphere. When the temperature of the heat-generating components inside the cabinet reaches a preset temperature Ta (the heat-generating components can refer to copper busbars, shunts, control circuit boards, etc.), the second fan 12 starts operating. The second fan 12 can not only dissipate the accumulated heat and transfer heat to the surrounding atmosphere through the sheet metal shell of the charging terminal, but also exchange heat with the hot air inside the charging terminal and remove the heat generated by the components inside the cabinet through the coolant, further cooling the components of the charging pile. In the specific implementation process, the heat dissipation effect of the charging gun 1 can be prioritized, that is, the turbulence fan 15 inside the charging terminal is turned on first to dissipate the heat and transfer heat to the surrounding atmosphere through the sheet metal shell of the charging terminal. Only when the components inside the charging terminal are about to thermally runaway is the second fan 12 activated, and the speed of the second fan 12 is controlled so that the heat of the components inside the charging terminal can be removed by the coolant flowing through the second radiator 11.

[0037] In this embodiment, a humidity sensor installed inside the cabinet is also included to detect the humidity level of the cabinet, thereby efficiently controlling the operation of components such as the second radiator 11 and the second fan 12. This embodiment also includes a temperature sensor; at least one of the following locations is equipped with a temperature sensor: the charging gun head, the charging gun tail, the water inlet / outlet water outlet, the first radiator 2, and the second radiator 11; and the temperature of various parts in the coolant circulation pipeline is detected to adjust and control the operating status of each component in a timely manner.

[0038] Specifically, in this embodiment, the first fan 10 is in direct contact with the atmosphere, driving air to exchange heat with the first radiator 2. The second fan 12 is not in direct contact with the atmosphere, driving air to circulate inside the charging pile. An ambient temperature sensor can be installed in front of the air inlet of the first fan 10, and a temperature and humidity sensor can be installed inside the cabinet to calculate the corresponding dew point temperature using the data collected by the temperature and humidity sensors. A temperature sensor can also be installed on the second radiator 11 to monitor the temperature of the coolant inside the second radiator 11, and a temperature sensor can be installed on the first radiator 2 to monitor the temperature of the coolant inside. In this embodiment, temperature sensors can also be installed at the head and tail of the charging gun 1, as well as at the water inlet / outlet water dispenser 3 and the water return / outlet water dispenser 6. When the charging pile's control unit controls the second water pump 8 and the first water pump 5 to operate at a set speed, the temperature sensors can acquire temperature data at the head and tail of the charging gun 1, as well as at the water inlet / outlet water dispenser 3 and the water return / outlet water dispenser 6, thereby reasonably adjusting the speed of the water pumps and the cooling fans to control the temperature of the charging gun 1 and the cables within a reasonable range.

[0039] This embodiment, through the aforementioned arrangement of the radiator and fan, can also solve the dehumidification problem.

[0040] In actual operation, dehumidification can be performed as follows:

[0041] Step 1: When T1-T2>b is detected at any time of day, the dehumidification mode is activated. Specifically, T1 represents the dew point temperature, T2 represents the temperature at the air inlet of the first fan 10, and b represents the heat transfer temperature difference of the flat wall. After each charging is completed, the turbulence fan 15 and the second fan 12 inside the cabinet stop and no longer dissipate the residual heat in the charging terminal. The first fan 10 and the first water pump 5 can continue to run at the preset speed for 3 minutes, and then stop and remain stationary.

[0042] Step 2: For the exterior of the cabinet: After 3 minutes, calculate the difference between T1 and T3, where T3 represents the temperature of the first radiator 2. When T1-T3 > 0, start the water pump and the first fan 10 at the preset minimum speed. When T1-T3 < 0, stop the water pump and the first fan 10. During this process, the first water pump 5 and the second water pump 8 start and stop simultaneously, or only the second water pump 8 starts and stops while the first water pump 5 remains stationary. For the interior of the cabinet: After 3 minutes, calculate the difference between T1 and T4, where T4 represents the temperature of the second radiator 11. When T1-T4 > b, start the second fan 12 at the minimum speed. When b > T1-T4 > 0, stop the second fan 12.

[0043] It is understandable that if a car comes to charge during the second step of the process, the dehumidification process can be stopped immediately and restarted after the next charging cycle. This embodiment uses this method to dehumidify, making the second radiator 11 the lowest-temperature component inside the charging terminal. This maintains a certain temperature difference between the charging terminal and other components prone to short circuits or insulation failures due to condensation, ensuring that condensation adheres to the second radiator 11 and not to components such as copper busbars, shunts, and control circuit boards that are susceptible to failure due to condensation, thus achieving a good dehumidification effect. In some more specific embodiments, a drip tray and drain pipe can also be provided to drain the condensate from the second radiator 11 to the outside of the charging station.

[0044] like Figure 7 As shown, in some embodiments of this example, the coolant circulation pipeline further includes a plate heat exchanger 13, and the liquid-cooled charging pile further includes an external circulation cooling device 14, which is used to dissipate the heat from the plate heat exchanger 13. Specifically, the external circulation cooling device 14 can perform secondary cooling of the coolant, further improving the cooling efficiency of the coolant circulation pipeline. Specifically, by adding a plate heat exchanger 13 between the second water pump 8 and the first water pump 5 along the internal circulation water flow direction, it can be ensured that H1 < H2, that is, the overall outlet pressure of the internal circulation water pump will not increase, thereby effectively preventing coolant leakage and improving the safety and stability of the coolant circulation pipeline.

[0045] It is understandable that, in specific implementation, the external circulation cooling device 14 can be used as a backup or auxiliary cooling device. For example, when one of the second water pump 8 or the first water pump 5 fails, causing a decrease in coolant flow, the external circulation can be activated to quickly reduce the temperature of the internal circulating coolant flowing through the plate heat exchanger 13, ensuring that the current flow capacity of the charging gun 1 does not decrease. For example, when the ambient temperature is too high or the current of the charging gun 1 is too large, and forced convection cooling of the first radiator 2 by the first fan 10 is insufficient to meet the heat dissipation of the charging gun 1, the external circulation can be activated to improve the heat dissipation capacity of the internal circulation, thereby ensuring that the charging gun 1 can flow with a larger current.

[0046] Furthermore, in this embodiment, the external circulation cooling device 14 is a Freon phase change circulation device or a water chiller circulation cooling device.

[0047] Specifically, in some embodiments, the Freon phase change cycle device may include a plate evaporator installed in parallel with the plate heat exchanger 13, as well as a compressor, condenser, receiver, expansion valve, and other structures. These structures are connected sequentially to form a two-stage cooling cycle, thereby enabling processes such as evaporation heat absorption, compression temperature rise, condensation heat release, and expansion pressure drop. Low-temperature cooling water is then transported to the plate heat exchanger 13 to exchange heat with its internal coolant, achieving efficient heat dissipation. In other embodiments, a chiller from a water-cooled circulating cooling device is used to transport chilled water to the plate heat exchanger 13, thereby cooling the coolant.

[0048] By implementing this embodiment, the advantages of natural cooling are fully utilized. The coolant first flows through the first radiator 2 and is cooled for the first time by forced convection through the fan. Then it flows through the plate heat exchanger 13 and is cooled for the second time through external circulation, which greatly improves the cooling efficiency.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid-cooled charging pile, characterized in that, It includes a charging gun and a coolant circulation pipeline. The coolant circulation pipeline includes a first radiator, a first pipeline section, and a second pipeline section. The first radiator is connected between the first pipeline section and the second pipeline section, and the first pipeline section and the second pipeline section are respectively connected to the cooling part of the charging gun. The first pipeline section includes an inlet water separator, a first water tank, and a first water pump disposed after the first water tank along the coolant flow direction; the second pipeline section includes a return water separator, a second water tank, and a second water pump disposed after the second water tank along the coolant flow direction. If the first water tank is an open water tank and the second water tank is a closed water tank, or both the first water tank and the second water tank are open water tanks; or both the first water tank and the second water tank are closed water tanks, then the first water tank is higher than the second water tank in the height direction. If the first water tank is a closed water tank and the second water tank is an open water tank, then the first water tank is lower than the second water tank in the height direction.

2. The liquid-cooled charging pile according to claim 1, characterized in that, A first fan is also provided on one side of the first radiator.

3. The liquid-cooled charging pile according to claim 2, characterized in that, The coolant circulation pipeline also includes a second radiator; the liquid-cooled charging pile also includes a cabinet, a charging pile host installed in the cabinet, and a charging gun cable connecting the charging pile host and the charging gun, wherein the second radiator is installed in the cabinet and the first radiator is installed outside the cabinet.

4. The liquid-cooled charging pile according to claim 3, characterized in that, The cabinet is also equipped with a second fan, which is installed on one side of the second radiator.

5. The liquid-cooled charging pile according to claim 4, characterized in that, It also includes a humidity sensor installed inside the cabinet.

6. The liquid-cooled charging pile according to claim 5, characterized in that, It also includes a temperature sensor, and the temperature sensor is provided at least one of the following: the charging gun head, the charging gun tail, the water inlet separator, the water return separator, the first radiator, and the second radiator.

7. The liquid-cooled charging pile according to claim 1, characterized in that, The coolant circulation pipeline also includes a plate heat exchanger, and the liquid-cooled charging pile also includes an external circulation cooling device, which is used to remove heat from the plate heat exchanger.

8. The liquid-cooled charging pile according to claim 7, characterized in that, The external circulation cooling device is either a Freon phase change circulation device or a water chiller circulation cooling device.

9. The liquid-cooled charging pile according to claim 1, characterized in that, It also includes a filter disposed between the second water pump and the first radiator.

10. The liquid-cooled charging pile according to claim 1, characterized in that, Both the first water pump and the second water pump are centrifugal water pumps; or, of the first water pump and the second water pump, one is a centrifugal water pump and the other is a vane pump or a gear pump.

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