Charging pile cooling system and control method thereof

Abstract

A charging pile cooling system is used for a charging pile comprising a charging pile main machine and a charging gun column and comprises a charging pile main machine cooling part, a charging gun column cooling part and a liquid cooling unit. The charging pile host cooling part comprises a liquid cooling plate used for cooling a charging pile host and a first cooling pipeline connected with the liquid cooling unit and the liquid cooling plate. The charging gun column cooling part comprises a liquid cooling cable used for cooling the charging gun column and a second cooling pipeline connected with the liquid cooling unit and the liquid cooling cable; the liquid cooling unit is used for providing cooling liquid for the liquid cooling plate and the liquid cooling cable through the first cooling pipeline and the second cooling pipeline 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.

Description

Technical Field

[0001] The present invention relates to the field of liquid cooling technology, and in particular to a charging pile cooling system and a control method thereof. Background Art

[0002] With the booming 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 user's charging experience and the promotion and use of electric vehicles. The existing charging pile host and charging gun column are cooled by different refrigeration equipment respectively. This separate design leads to two problems: one is the limited size of the equipment, and the other is the low cooling efficiency.

[0003] Specifically, since the charging pile host and the charging gun column each integrate a set of independent refrigeration equipment, this design not only increases the complexity and manufacturing cost of the overall equipment, but also is limited by the spatial layout, making it difficult to further reduce the overall size of the equipment. In practical applications, this may affect the installation and deployment of charging piles, especially in urban environments with limited space, where large-sized charging piles may become a major problem. In addition, the cooling efficiency of the two independent refrigeration equipment is often not high when they are in operation. On the one hand, since the cooling system needs to dissipate heat for the host and the gun column separately, this may lead to uneven heat distribution, causing some parts to overheat, while other parts may be overcooled, thus affecting the overall heat dissipation effect. On the other hand, the operation and maintenance costs of the two sets of refrigeration equipment are also relatively high, which not only increases the operating costs, 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 effect on the charging pile host and the charging gun column. Summary of the invention

[0005] The purpose of the present invention is to address the corresponding deficiencies of the prior art and provide a charging pile cooling system and a control method thereof. The cooling sources of the charging pile host and the charging gun column are designed in the same liquid cooling unit, and the charging pile host and the charging gun are cooled simultaneously through the diversion design of the water system pipeline of the liquid cooling unit.

[0006] The objective of the present invention is achieved by adopting the following scheme: The embodiment of the first aspect of the present invention provides a charging pile cooling system for a charging pile including a charging pile host and a charging gun column, including a charging pile host cooling unit, a charging gun column cooling unit, and a liquid cooling unit; The charging pile host cooling unit includes 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 unit includes 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.

[0007] Furthermore, the first cooling pipeline is provided with a first electric throttle valve for adjusting the flow rate of the coolant, and the second cooling pipeline is provided with a second electric throttle valve for adjusting the flow rate of the coolant.

[0008] Furthermore, the charging pile cooling system also includes a temperature sensing unit communicatively connected to the liquid cooling unit, wherein the temperature sensing unit is used to monitor the temperature of the charging pile host and the charging gun column, and to generate a request signal for requesting the liquid cooling unit to provide coolant when the temperature of the charging pile host and the charging gun column exceeds a preset high temperature threshold.

[0009] Furthermore, the liquid-cooled cable is provided with a cable cooling control valve for controlling the on / off and flow rate of the cooling liquid in the liquid-cooled cable.

[0010] Furthermore, the liquid cooling unit includes a water system, a fluorine system and a plate heat exchanger, the water system contains a coolant for absorbing the heat of the charging pile host and the charging gun column, and the fluorine system contains a refrigerant for cooling the coolant; the plate heat exchanger includes a first plate for absorbing the heat of the coolant, and a second plate for absorbing the heat of the first plate and transferring the heat to the refrigerant.

[0011] Furthermore, the first cooling pipeline and the second cooling pipeline are both fluidically connected to the water system; the water system also includes a circulation pump for driving the coolant to flow in the first cooling pipeline and the second cooling pipeline.

[0012] Furthermore, the water system also includes a coolant coil, which is arranged in the first plate, and the first cooling pipeline and the second cooling pipeline are both fluidically connected to the coolant coil, and the circulating pump is used to drive the coolant to flow through the coolant coil to dissipate heat.

[0013] Furthermore, the fluorine system includes a compressor, a condenser, and a refrigerant coil connected by a circulating fluid, the compressor is used to compress the refrigerant, the condenser is used to condense the compressed refrigerant, and the refrigerant coil is arranged in the second plate to allow the refrigerant to absorb heat from the coolant when flowing through the refrigerant coil.

[0014] The second aspect of the present invention provides a control method for a charging pile cooling system, which is used for a charging pile including a charging pile host and a charging gun column, and is characterized in that it includes the following steps: S1, providing a charging pile cooling system as described in any one of claims 1 to 8; 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.

[0015] Furthermore, the step S2 further includes the following operations: When there are multiple charging gun columns and the temperature of at least one of the multiple charging gun columns exceeds a preset high temperature threshold, the flow rate of the coolant 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; Furthermore, the step S3 also includes the following operations: The cooling liquid is provided to the liquid-cooled cable through the second cooling pipeline, so as to cool the plurality of charging gun posts through the charging gun post cooling unit until the temperature of each of the charging gun posts is lower than the high temperature threshold.

[0016] The advantage of the present invention is that by integrating the cooling sources of the charging pile host and the charging gun column into the same liquid cooling unit, the highly integrated liquid cooling unit achieves optimal utilization of space, making the overall layout of the charging station more compact, while also reserving more possibilities for future expansion and upgrading. In terms of heat dissipation efficiency, the liquid cooling unit of the present invention ensures that the charging pile host and the charging gun column can obtain cooling resources simultaneously and evenly through the precise water system pipeline diversion 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 extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a module block diagram of a charging pile cooling system according to an embodiment of the present invention; Figure 2 It is an internal diagram of a charging pile host of a charging pile host cooling part of a charging pile cooling system according to an embodiment of the present invention; Figure 3 This is a control principle diagram of the charging pile cooling system according to an embodiment of the present invention; Figure 4 The figure is a flow chart of a control method of a charging pile cooling system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] A charging pile cooling system and a control method thereof provided by the present invention can be applied to electric vehicle charging stations, new energy vehicle charging facilities, and high-power fast charging fields. The system integrates the cooling requirements of the charging pile host and the charging gun column into the same liquid cooling unit through an efficient heat dissipation design, and utilizes the shunt design of the water system pipeline of the liquid cooling unit to achieve efficient operation of both cooling at the same time. Under high-intensity charging operations, the cooling system can ensure the stable operation of the charging pile host and the charging gun column, improve charging efficiency, and extend the service life of the equipment. At the same time, by precisely controlling the flow and temperature of the coolant, energy consumption optimization is achieved and operating costs are reduced.

[0019] like Figure 1 As shown, the present invention provides a charging pile cooling system for a charging pile including a charging pile host and a charging gun column, including a charging pile host cooling part 100, a charging gun column cooling part 200, and a liquid cooling unit 300.

[0020] like Figure 2-3 As shown, the charging pile host cooling unit 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 is provided with a first electric throttle valve 121 for adjusting the flow rate of the coolant. The coolant is allowed or prohibited to enter the first cooling pipeline 120 by controlling the opening and closing of the first electric throttle valve 121.

[0021] The charging gun column cooling unit 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 is provided with a second electric throttle valve 221 for adjusting the flow rate of the coolant. The coolant is allowed or prohibited to enter the second cooling pipeline 220 by controlling the opening and closing of the second electric throttle valve 221.

[0022] 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 unit 100 and the charging gun column cooling unit 200. The liquid cooling plate 110 removes the heat generated by the battery module in the charging pile host through the circulation of the cooling liquid.

[0023] 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 heat of the coolant, and a second plate 312 for absorbing heat of the first plate 311 and transferring the heat to the refrigerant.

[0024] The charging pile cooling system also includes a temperature sensing unit that is communicatively connected to 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 a preset high temperature threshold.

[0025] The charging pile cooling system further includes a pressure sensing unit in communication 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 to generate an opening signal for adjusting 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.

[0026] The liquid-cooled cable 210 is provided with a cable cooling control valve 211 for controlling the on-off and flow of the coolant in the liquid-cooled cable 210. The liquid-cooled cable 210 is also provided with a one-way valve 212 for preventing the outflowing coolant from returning to the charging gun column. When the temperature of any charging gun column reaches the set temperature, the corresponding cable cooling control valve 211 opens, and the coolant in the second cooling pipeline 220 enters the charging gun column for circulating cooling. The coolant temperature and pressure of the second cooling pipeline 220 are monitored in real time, the heat exchange required by the charging gun column is calculated by the feedback temperature, and the required flow and actual flow of the coolant in the second cooling pipeline 220 are calculated by the feedback pressure value. The liquid cooling unit 300 dynamically adjusts the opening of the second electric throttle valve 221 to control the flow of coolant in the second cooling pipeline 220.

[0027] The water system 320 includes a coolant for absorbing heat from the charging pile host and the charging gun column. The first cooling pipeline 120 and the second cooling pipeline 220 are both fluidically connected to the water system 320. The water system 320 also includes a circulating pump 321 for driving the coolant to flow in the first cooling pipeline 120 and the second cooling pipeline 220. The water system 320 also includes an expansion water tank 322 and a filter 323. The expansion water tank 322 is used to store and compensate for the amount of expanded coolant generated by temperature changes, and the filter 323 is used to filter impurities in the coolant.

[0028] The water system 320 also includes a coolant coil, which is arranged in the first plate 311. The first cooling pipeline 120 and the second cooling pipeline 220 are both fluidically connected to the coolant coil. The circulating pump 321 is used to drive the coolant to flow through the coolant coil to dissipate heat.

[0029] The fluorine system 330 includes a refrigerant for cooling the cooling liquid, and includes a gas-liquid separator 331, a compressor 332, a condenser 333, a fan 334, a filter dryer 335, an electronic expansion valve 336, and a refrigerant coil connected by a circulating fluid. The gas-liquid separator 331 is used to separate the gaseous and liquid states of the refrigerant, the compressor 332 is used to compress the refrigerant, the condenser 333 is used to condense the compressed refrigerant, the fan 334 is used to dissipate heat during the condensation process of the refrigerant, the filter dryer 335 is used to remove mechanical impurities and adsorbed moisture in the refrigerant, the electronic expansion valve 336 is used to determine the valve opening according to the degree of overheating of the refrigerant, so as to effectively adjust the amount of refrigerant entering the second plate 312, and the refrigerant coil is arranged in the second plate 312, so as to allow the refrigerant to absorb heat from the cooling liquid when flowing through the refrigerant coil.

[0030] The water system 320 also 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 to monitor the temperature difference between the upstream and downstream of the water system 320 pipeline. The first pressure sensor 326 and the second pressure sensor 327 are used to monitor the pressure difference between the upstream and downstream of the water system 320 pipeline. The heat exchange amount is calculated based on the temperature difference and the pressure difference, and the speed of the compressor 332 or the fan 334 is reduced, thereby reducing the operating power of the liquid cooling unit 300 and achieving the effect of reducing energy efficiency.

[0031] When the module temperature of the charging pile host exceeds the optimal operating temperature due to operation or exposure problems, the temperature sensor in the charging pile host transmits a signal to the liquid cooling unit 300, and the liquid cooling unit 300 starts the fluorine system 330 for refrigeration, starts the water system 320 circulation, opens the ball valve 1, and the coolant enters the water system 320 from the water inlet 2, opens the first electric throttle valve 121, monitors the coolant temperature and pressure of the first cooling pipeline 120 in real time, calculates and determines the heat exchange required by the charging pile host, and then calculates the required flow rate and actual flow rate of the coolant in the first cooling pipeline 120 through the 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 coolant flow in the first cooling pipeline 120.

[0032] like Figure 4As shown, the embodiment of the second aspect of the present invention provides a control method for a charging pile cooling system, which is used for a charging pile including a charging pile host and a charging gun column, and is characterized in that it includes the following steps: S1, providing a charging pile cooling system as described in any one of claims 1 to 8; 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.

[0033] The step S2 also includes the following operation: when there are multiple charging gun columns and the temperature of at least one of the multiple charging gun columns exceeds a preset high temperature threshold, the flow rate of the coolant provided to the second cooling pipeline 220 is determined according to the temperature of the charging gun column with the highest temperature among the multiple charging gun columns.

[0034] 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.

[0035] The step S3 also includes the following operation: providing cooling liquid to the liquid-cooled cable 210 through the second cooling pipeline 220 to cool the multiple charging gun posts through the charging gun post cooling unit 200 until the temperature of each charging gun post is lower than the high temperature threshold.

[0036] The charging pile cooling system and control method provided by the present invention integrate the cooling sources of the charging pile host and the charging gun column into the same liquid cooling unit 300. The advantage of the present invention is that by integrating the cooling sources of the charging pile host and the charging gun column into the same liquid cooling unit 300, the space is optimized through the highly integrated liquid cooling unit 300, making the overall layout of the charging station more compact, while also reserving more possibilities for future expansion and upgrading. In terms of heat dissipation efficiency, the liquid cooling unit 300 of the present invention ensures that the charging pile host and the charging gun column can obtain cooling resources simultaneously and evenly through the precise water system 320 pipeline diversion 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 extends the service life of the equipment.

Claims

1. A charging pile cooling system, used for a charging pile including a charging pile host and a charging gun column, characterized in that: It includes the charging pile host cooling unit, the charging gun column cooling unit, and the liquid cooling unit; The charging pile host cooling unit includes 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 unit includes 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.

2. The charging pile cooling system according to claim 1, characterized in that: The first cooling pipeline is provided with a first electric throttle valve for adjusting the flow rate of the coolant, and the second cooling pipeline is provided with a second electric throttle valve for adjusting the flow rate of the coolant.

3. The charging pile cooling system according to claim 1, characterized in that: The charging pile cooling system also includes a temperature sensing unit that is communicatively connected to 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 for requesting the liquid cooling unit to provide coolant when the temperature of the charging pile host and the charging gun column exceeds a preset high temperature threshold.

4. The charging pile cooling system according to claim 1, characterized in that: The liquid-cooled cable is provided with a cable cooling control valve for controlling the on / off and flow rate of the cooling liquid in the liquid-cooled cable.

5. The charging pile cooling system according to claim 1, characterized in that: The liquid cooling unit includes a water system, a fluorine system and a plate heat exchanger. The water system contains a coolant for absorbing the heat of the charging pile host and the charging gun column, and the fluorine system contains a refrigerant for cooling the coolant; the plate heat exchanger includes a first plate for absorbing the heat of the coolant, and a second plate for absorbing the heat of the first plate and transferring the heat to the refrigerant.

6. The charging pile cooling system according to claim 5, characterized in that: The first cooling pipeline and the second cooling pipeline are both fluidically connected to the water system; the water system also includes a circulation pump for driving the coolant to flow in the first cooling pipeline and the second cooling pipeline.

7. The charging pile cooling system according to claim 5, characterized in that: The water system also includes a coolant coil, which is arranged in the first plate. The first cooling pipeline and the second cooling pipeline are both fluidically connected to the coolant coil. The circulating pump is used to drive the coolant to flow through the coolant coil to dissipate heat.

8. The charging pile cooling system according to claim 5, characterized in that: The fluorine system includes a compressor, a condenser, and a refrigerant coil which are cyclically fluidly connected. The compressor is used to compress the refrigerant. The condenser is used to condense the compressed refrigerant. The refrigerant coil is arranged in the second plate to allow the refrigerant to absorb heat from the cooling liquid when flowing through the refrigerant coil.

9. A control method for a charging pile cooling system, for a charging pile including a charging pile host and a charging gun column, characterized in that: The following steps are involved: S1, providing a charging pile cooling system as described in any one of claims 1 to 8; 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.

10. The method according to claim 9, characterized in that The step S2 further includes the following operations: When there are multiple charging gun columns and the temperature of at least one of the multiple charging gun columns exceeds a preset high temperature threshold, the flow rate of the coolant 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; The step S3 also includes the following operations: The cooling liquid is provided to the liquid-cooled cable through the second cooling pipeline, so as to cool the plurality of charging gun posts through the charging gun post cooling unit until the temperature of each of the charging gun posts is lower than the high temperature threshold.

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