A charging pile cooling system and a control method thereof

Abstract

A charging pile cooling system for a charging pile including a charging pile host and a charging gun column, comprising a charging pile host cooling part, a charging gun column cooling part, and a liquid cooling unit; the charging pile host cooling part comprises a liquid cooling plate for cooling the charging pile host, and a first cooling pipeline connecting the liquid cooling unit and the liquid cooling plate; the charging gun column cooling part comprises a liquid cooling cable for cooling the charging gun column, and a second cooling pipeline connecting the liquid cooling unit and the liquid cooling cable; the liquid cooling unit is used to provide cooling liquid to the liquid cooling plate and the liquid cooling cable through the first cooling pipeline and the second cooling pipeline respectively, so as to cool the charging pile host and the charging gun column through the charging pile host cooling part and the charging gun column cooling part respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling, in particular to a charging pile cooling system and a control method thereof. BACKGROUND

[0002] With the vigorous development and popularization of the electric vehicle industry, the requirements for charging facilities are also increasing. As an important supporting equipment for electric vehicles, the performance and stability of charging piles are directly related to the charging experience of users and the popularization and use of electric vehicles. The existing charging pile host and charging gun column respectively use different refrigeration equipment for cooling. This separated design leads to two problems: one is the limitation of device size, and the other is the low refrigeration efficiency.

[0003] Specifically, since the charging pile host and the charging gun column each integrate an independent refrigeration device, this design not only increases the complexity and manufacturing cost of the overall device, but also is limited by the space layout, making it difficult to further reduce the overall size of the device. In actual application, this may affect the installation and deployment of the charging pile, especially in the urban environment with limited space, the large size of the charging pile may become a big problem. In addition, the refrigeration efficiency of the two independent refrigeration devices is often not high when running. On the one hand, since the cooling system needs to cool the host and the gun column respectively, this may lead to uneven heat distribution, causing some parts to overheat, while other parts may be over-cooled, thereby affecting the overall cooling effect. On the other hand, the operation and maintenance cost of the two sets of refrigeration equipment is relatively high, which not only increases the operating cost, but also may reduce the reliability and stability of the system.

[0004] Therefore, it is an urgent problem to provide a more efficient and reliable charging pile cooling system and a control method thereof, while achieving efficient cooling of the charging pile host and the charging gun column. SUMMARY

[0005] The purpose of the present application is to provide a charging pile cooling system and a control method thereof, which designs the refrigeration source of the charging pile host and the charging gun column in the same liquid cooling unit, and realizes the simultaneous cooling of the charging pile host and the charging gun through the shunt design of the liquid cooling unit water system pipeline.

[0006] The purpose of the present application is achieved by the following scheme:

[0007] The first aspect of the embodiment of the present application provides a charging pile cooling system for a charging pile including a charging pile host and a charging gun column, comprising a charging pile host cooling part, a charging gun column cooling part, and a liquid cooling unit.

[0008] The charging pile host cooling part comprises a liquid cooling plate for cooling the charging pile host, and a first cooling pipeline connecting the liquid cooling unit and the liquid cooling plate;

[0009] The charging gun column cooling part comprises a liquid cooling cable for cooling the charging gun column, and a second cooling pipeline connecting the liquid cooling unit and the liquid cooling cable;

[0010] The liquid cooling unit is used to provide cooling liquid to the liquid cooling plate and the liquid cooling cable through the first cooling pipeline and the second cooling pipeline respectively, so as to cool the charging pile host and the charging gun column through the charging pile host cooling part and the charging gun column cooling part respectively.

[0011] Further, the first cooling pipeline is provided with a first electric throttle valve for adjusting the flow of cooling liquid, and the second cooling pipeline is provided with a second electric throttle valve for adjusting the flow of cooling liquid.

[0012] Further, the charging pile cooling system further comprises a temperature sensing unit in communication connection with the liquid cooling unit, the temperature sensing unit is used to monitor the temperature of the charging pile host and the charging gun column, and generate a request signal requesting the liquid cooling unit to provide cooling liquid when the temperature of the charging pile host and the charging gun column exceeds a preset high temperature threshold.

[0013] Further, the liquid cooling cable is provided with a cable cooling control valve for controlling the on-off and flow of cooling liquid in the liquid cooling cable.

[0014] Further, the liquid cooling unit comprises a water system, a fluorine system and a plate heat exchanger, the water system contains cooling liquid for absorbing the heat of the charging pile host and the charging gun column, and the fluorine system contains refrigerant for cooling the cooling liquid; the plate heat exchanger comprises a first plate for absorbing the heat of the cooling liquid, and a second plate for absorbing the heat of the first plate and transferring the heat to the refrigerant.

[0015] Further, the first cooling pipeline and the second cooling pipeline are both in fluid connection with the water system; the water system further comprises a circulating pump for driving the cooling liquid to flow in the first cooling pipeline and the second cooling pipeline.

[0016] Further, the water system further comprises a cooling liquid coil, the cooling liquid coil is arranged in the first plate, and the first cooling pipeline and the second cooling pipeline are both in fluid connection with the cooling liquid coil, and the circulating pump is used to drive the cooling liquid to flow through the cooling liquid coil to dissipate heat.

[0017] Further, the fluorine system comprises a compressor, a condenser and a refrigerant coil connected in circulation, the compressor is used for compressing the refrigerant, the condenser is used for condensing the compressed refrigerant, and the refrigerant coil is arranged in the second plate and used for absorbing heat from the cooling liquid when the refrigerant flows through the refrigerant coil.

[0018] Embodiments of the second aspect of the application provide a control method of a charging pile cooling system, for a charging pile comprising a charging pile host and a charging gun column, comprising the following steps:

[0019] S1, providing the charging pile cooling system according to any one of the preceding embodiments;

[0020] S2, when at least one of the temperature of the charging pile host and the temperature of the charging gun column exceeds a preset high temperature threshold, providing cooling liquid to at least one of the liquid cooling plate and the liquid cooling cable through the liquid cooling unit of the charging pile cooling system;

[0021] S3, cooling at least one of the charging pile host and the charging gun column through at least one of the liquid cooling plate and the liquid cooling cable.

[0022] Further, the step S2 further comprises the following operations:

[0023] When the charging gun column is multiple, and the temperature of at least one of the multiple charging gun columns exceeds the preset high temperature threshold, the flow of the cooling liquid provided to the second cooling pipeline is determined according to the temperature of the charging gun column with the highest temperature among the multiple charging gun columns;

[0024] Further, the step S3 further comprises the following operations:

[0025] The cooling liquid is provided to the liquid cooling cable through the second cooling pipeline to cool the multiple charging gun columns through the charging gun column cooling part until the temperature of each charging gun column is lower than the high temperature threshold.

[0026] The advantage of the application is that by integrating the refrigeration sources of the charging pile host and the charging gun column into the same liquid cooling unit, the space is optimized by the highly integrated liquid cooling unit, making the overall layout of the charging station more compact, and also reserving more possibilities for future expansion and upgrading. In terms of heat dissipation efficiency, the liquid cooling unit of the application ensures that the charging pile host and the charging gun column can obtain cooling resources simultaneously and evenly through the precise water system pipeline shunt design, which not only avoids the problem of equipment overheating caused by uneven heat dissipation, but also significantly improves the overall heat dissipation efficiency and prolongs the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A module block diagram of a charging pile cooling system according to an embodiment of the present application;

[0028] Figure 2 An internal diagram of a charging pile host of a charging pile cooling system according to an embodiment of the present application;

[0029] Figure 3 A control schematic diagram of a charging pile cooling system according to an embodiment of the present application;

[0030] Figure 4 A flowchart of a control method of a charging pile cooling system according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The charging pile cooling system and the control method thereof provided by the present application can be applied to electric vehicle charging stations, new energy vehicle charging facilities, and high-power fast charging fields. The system integrates the refrigeration requirements of the charging pile host and the charging gun column in the same liquid cooling unit through efficient heat dissipation design, and realizes efficient operation of simultaneous cooling of the two by using the shunt design of the liquid cooling unit water system pipeline. Under high-intensity charging operation, the cooling system can ensure the stable operation of the charging pile host and the charging gun column, improve the charging efficiency, and prolong the service life of the equipment. At the same time, by precisely controlling the cooling liquid flow and temperature, energy consumption optimization is realized, and operating costs are reduced.

[0032] As shown in Figure 1 The present application provides a charging pile cooling system for a charging pile including a charging pile host and a charging gun column, comprising a charging pile host cooling part 100, a charging gun column cooling part 200, and a liquid cooling unit 300.

[0033] As shown in Figures 2-3 The charging pile host cooling part 100 includes a liquid cooling plate 110 for cooling the charging pile host, and a first cooling pipeline 120 connecting the liquid cooling unit 300 and the liquid cooling plate 110, the first cooling pipeline 120 being provided with a first electric throttle valve 121 for adjusting the flow of cooling liquid, and the opening and closing of the first electric throttle valve 121 is controlled to allow and prohibit the cooling liquid to enter the first cooling pipeline 120.

[0034] The charging gun column cooling part 200 includes a liquid cooling cable 210 for cooling the charging gun column, and a second cooling pipeline 220 connecting the liquid cooling unit 300 and the liquid cooling cable 210, the second cooling pipeline 220 being provided with a second electric throttle valve 221 for adjusting the flow of cooling liquid, and the opening and closing of the second electric throttle valve 221 is controlled to allow and prohibit the cooling liquid to enter the second cooling pipeline 220.

[0035] The liquid cooling unit 300 is used to provide cooling liquid to the liquid cooling plate 110 and the liquid cooling cable 210 through the first cooling pipeline 120 and the second cooling pipeline 220 respectively, so as to cool the charging pile host and the charging gun column through the charging pile host cooling part 100 and the charging gun column cooling part 200 respectively. The liquid cooling plate 110 takes away the heat generated by the battery module in the charging pile host through the circulation of the cooling liquid.

[0036] The liquid cooling unit 300 includes a plate heat exchanger 310, a water system 320 and a fluorine system 330, the plate heat exchanger 310 includes a first plate 311 for absorbing the heat of the cooling liquid, and a second plate 312 for absorbing the heat of the first plate 311 and transferring the heat to the refrigerant.

[0037] The charging pile cooling system further includes a temperature sensing unit in communication connection with the liquid cooling unit 300, the temperature sensing unit is used to monitor the temperature of the charging pile host and the charging gun column, and generate a request signal for requesting the liquid cooling unit 300 to provide cooling liquid when the temperature of the charging pile host and the charging gun column exceeds the preset high temperature threshold.

[0038] The charging pile cooling system further includes a pressure sensing unit in communication connection with the liquid cooling unit 300, the pressure sensing unit is used to monitor the pressure of the first cooling pipeline 120 and the second cooling pipeline 220, and generate an opening signal of the first electric throttle valve 121 and the second electric throttle valve 221 according to the pressure. The third pressure sensor 122 monitors the pressure of the first cooling pipeline 120, and the fourth pressure sensor 222 monitors the pressure of the second cooling pipeline 220.

[0039] The liquid cooling cable 210 is provided with a cable cooling control valve 211 for controlling the on-off and flow of the cooling liquid in the liquid cooling cable 210, and the liquid cooling cable 210 is further provided with a one-way valve 212 for avoiding the returned cooling liquid from flowing back into the charging gun column. When the temperature of any charging gun column reaches the set temperature, the corresponding cable cooling control valve 211 is opened, and the cooling liquid in the second cooling pipeline 220 enters the charging gun column for circulation cooling. The temperature and pressure of the cooling liquid in the second cooling pipeline 220 are monitored in real time, the required heat exchange amount of the charging gun column is calculated through the feedback temperature, and the required flow and actual flow of the cooling liquid in the second cooling pipeline 220 are calculated through the feedback pressure value, and the liquid cooling unit 300 dynamically adjusts the opening of the second electric throttle valve 221 to control the flow of the cooling liquid in the second cooling pipeline 220.

[0040] The water system 320 includes a cooling liquid for absorbing heat of the charging pile host and the charging gun column, the first cooling pipeline 120 and the second cooling pipeline 220 are both in fluid connection with the water system 320, the water system 320 further includes a circulating pump 321 for driving the cooling liquid to flow in the first cooling pipeline 120 and the second cooling pipeline 220, the water system 320 further includes an expansion tank 322 and a filter 323, the expansion tank 322 is used for storing and compensating the expanded cooling liquid amount due to temperature change, and the filter 323 is used for filtering impurities in the cooling liquid.

[0041] The water system 320 further includes a cooling liquid coil provided in the first plate 311, the first cooling pipeline 120 and the second cooling pipeline 220 are both in fluid connection with the cooling liquid coil, and the circulating pump 321 is used for driving the cooling liquid to flow through the cooling liquid coil for heat dissipation.

[0042] The fluorine system 330 includes a refrigerant for cooling the cooling liquid; the fluorine system 330 includes a circulating fluid connection of a gas-liquid separator 331, a compressor 332, a condenser 333, a fan 334, a dry filter 335, an electronic expansion valve 336 and a refrigerant coil, the gas-liquid separator 331 is used for separating the gaseous and liquid states of the refrigerant, the compressor 332 is used for compressing the refrigerant, the condenser 333 is used for condensing the compressed refrigerant, the fan 334 is used for heat dissipation during refrigerant condensation, the dry filter 335 is used for removing mechanical impurities and adsorbing moisture in the refrigerant, the electronic expansion valve 336 is used for determining the opening of the valve according to the superheat degree of the refrigerant, so as to effectively adjust the amount of refrigerant entering the second plate 312, and the refrigerant coil is provided in the second plate 312 and is used for allowing the refrigerant to absorb heat from the cooling liquid when flowing through the refrigerant coil.

[0043] The water system 320 further includes a first temperature sensor 324, a second temperature sensor 325, a first pressure sensor 326 and a second pressure sensor 327, the first temperature sensor 324 and the second temperature sensor 325 are used for monitoring the temperature difference of the upstream and downstream of the water system 320 pipeline, the first pressure sensor 326 and the second pressure sensor 327 are used for monitoring the pressure difference of the upstream and downstream of the water system 320 pipeline, the heat exchange amount is calculated through the temperature difference and the pressure difference, the rotating speed of the compressor 332 or the fan 334 is reduced, so as to reduce the operating power of the liquid cooling unit 300, and the effect of reducing energy efficiency is realized.

[0044] When the temperature of the charging pile host exceeds the optimal working temperature due to operation or exposure problems, the temperature sensor in the charging pile host transmits a signal to the liquid cooling unit 300, the liquid cooling unit 300 starts the fluorine system 330 for refrigeration, starts the water system 320 for circulation, opens the ball valve 1, the cooling liquid enters the water system 320 from the water supplement port 2, opens the first electric throttle valve 121, monitors the cooling liquid temperature and pressure of the first cooling pipeline 120 in real time, calculates the required heat exchange amount of the charging pile host, and then calculates the required flow and actual flow of the cooling liquid in the first cooling pipeline 120 through the rotating speed of the circulating pump 321, and the liquid cooling unit 300 adjusts the opening of the first electric throttle valve 121 to control the flow of the cooling liquid in the first cooling pipeline 120.

[0045] As shown in Figure 4 The embodiment of the second aspect of the application provides a control method of a charging pile cooling system, for a charging pile including a charging pile host and a charging gun column, including the following steps:

[0046] S1, providing the charging pile cooling system according to any one of the above;

[0047] S2, when at least one of the temperature of the charging pile host and the temperature of the charging gun column exceeds a preset high temperature threshold, the liquid cooling unit 300 of the charging pile cooling system provides cooling liquid to at least one of the liquid cooling plate 110 and the liquid cooling cable 210.

[0048] The step S2 further includes the following operation: when the charging gun column is multiple, and the temperature of at least one of the multiple charging gun columns exceeds the preset high temperature threshold, the flow of the cooling liquid provided to the second cooling pipeline 220 is determined according to the temperature of the charging gun column with the highest temperature in the multiple charging gun columns.

[0049] S3, cooling at least one of the charging pile host and the charging gun column through at least one of the liquid cooling plate 110 and the liquid cooling cable 210.

[0050] The step S3 further includes the following operation: providing cooling liquid to the liquid cooling cable 210 through the second cooling pipeline 220 to cool the multiple charging gun columns through the charging gun column cooling part 200, until the temperature of each charging gun column is lower than the high temperature threshold.

[0051] The application provides a charging pile cooling system and a control method thereof, wherein the refrigeration sources of a charging pile host and a charging gun column are integrated into the same liquid cooling unit 300, and the application has the following advantages: by integrating the refrigeration sources of the charging pile host and the charging gun column into the same liquid cooling unit 300, the space is optimally utilized through the highly integrated liquid cooling unit 300, so that the overall layout of the charging station is more compact, and more possibilities are reserved for future expansion and upgrading. In terms of heat dissipation efficiency, the liquid cooling unit 300 of the application is designed through a precise water system 320 pipeline shunt, so that the charging pile host and the charging gun column can simultaneously and evenly obtain cooling resources, which not only avoids the overheating problem of equipment caused by uneven heat dissipation, but also significantly improves the overall heat dissipation efficiency and prolongs the service life of the equipment.

Claims

1. A charging pile cooling system for a charging pile comprising a charging pile host and a charging gun column, characterized in that, The charging pile cooling system comprises a charging pile host cooling part, a charging gun column cooling part, and a liquid cooling unit; The charging pile host cooling part comprises a liquid cooling plate for cooling the charging pile host, and a first cooling pipeline connecting the liquid cooling unit and the liquid cooling plate; The charging gun column cooling part comprises a liquid cooling cable for cooling the charging gun column, and a second cooling pipeline connecting the liquid cooling unit and the liquid cooling cable; The liquid cooling unit is configured to provide cooling liquid to the liquid cooling plate and the liquid cooling cable through the first cooling pipeline and the second cooling pipeline respectively, so as to cool the charging pile host and the charging gun column through the charging pile host cooling part and the charging gun column cooling part respectively; The liquid cooling unit comprises a water system, a fluorine system, and a plate heat exchanger, the water system contains cooling liquid for absorbing heat of the charging pile host and the charging gun column, the fluorine system contains refrigerant for cooling the cooling liquid, and the plate heat exchanger comprises first plate pieces for absorbing heat of the cooling liquid and second plate pieces for absorbing heat of the first plate pieces and transferring the heat to the refrigerant; The first cooling pipeline and the second cooling pipeline are both in fluid connection with the water system, and the water system further comprises a circulating pump for driving the cooling liquid to flow in the first cooling pipeline and the second cooling pipeline; The water system further comprises a cooling liquid coil pipe arranged in the first plate pieces, the first cooling pipeline and the second cooling pipeline are both in fluid connection with the cooling liquid coil pipe, and the circulating pump is configured to drive the cooling liquid to flow through the cooling liquid coil pipe for heat dissipation.

2. The charging station cooling system of claim 1, wherein, The first cooling pipeline is provided with a first electric throttle valve for adjusting the flow of the cooling liquid, and the second cooling pipeline is provided with a second electric throttle valve for adjusting the flow of the cooling liquid.

3. The charging station cooling system of claim 1, wherein, The charging pile cooling system further comprises a temperature sensing unit in communication connection with the liquid cooling unit, the temperature sensing unit is configured to monitor temperatures of the charging pile host and the charging gun column, and generate a request signal for requesting the liquid cooling unit to provide cooling liquid when the temperatures of the charging pile host and the charging gun column exceed a preset high temperature threshold.

4. The charging station cooling system of claim 1, wherein, The liquid cooling cable is provided with a cable cooling control valve for controlling on-off and flow of the cooling liquid in the liquid cooling cable.

5. The charging station cooling system of claim 1, wherein, The fluorine system comprises a compressor, a condenser, and a refrigerant coil pipe in circulation fluid connection, the compressor is configured to compress the refrigerant, the condenser is configured to condense the compressed refrigerant, and the refrigerant coil pipe is arranged in the second plate pieces and configured to allow the refrigerant to absorb heat from the cooling liquid when flowing through the refrigerant coil pipe.

6. A control method of a charging pile cooling system for a charging pile including a charging pile host and a charging gun column, characterized in that, The method comprises the following steps: S1, providing the charging pile cooling system according to any one of claims 1-5; S2, when at least one of the temperature of the charging pile host and the temperature of the charging gun column exceeds a preset high temperature threshold, providing cooling liquid to at least one of the liquid cooling plate and the liquid cooling cable through the liquid cooling unit of the charging pile cooling system; S3, cooling at least one of the charging pile host and the charging gun column through at least one of the liquid cooling plate and the liquid cooling cable.

7. The method of claim 6, wherein, The step S2 further comprises the following operations: When the charging gun column is multiple, and the temperature of at least one charging gun column in the multiple charging gun columns exceeds the preset high temperature threshold, the flow of the cooling liquid provided to the second cooling pipeline is determined according to the temperature of the charging gun column with the highest temperature in the multiple charging gun columns; The step S3 further comprises the following operations: The second cooling pipeline provides the cooling liquid to the liquid-cooled cable to cool the multiple charging gun columns through the charging gun column cooling part until the temperature of each charging gun column is lower than the high temperature threshold.

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