Charging pile cooling system and control method thereof

Abstract

The invention provides a charging pile cooling system and a control method thereof, and belongs to the technical field of charging piles.The charging pile cooling system comprises a cooling liquid pump, a cooling liquid pump inlet pipeline and a cooling liquid pump outlet pipeline, and the cooling liquid pump outlet pipeline is installed between the water outlet end of the cooling liquid pump and a charging gun; the cooling liquid pump inlet pipeline is installed between the charging gun and the water inlet end of the cooling liquid pump. The charging pile cooling system further comprises an air temperature sampling sensor, a gun temperature sampling sensor, a cooling liquid pump inlet sampling sensor, a cooling liquid pump outlet sampling sensor, a cooling fan, a charging control module and a power module. The operation states of the cooling liquid pump and the fan of the charging pile can be dynamically adjusted, quicker and more accurate temperature regulation and control are realized, and the working temperature of the high-charging-power liquid-cooling direct-current charging pile is effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging piles, and particularly relates to a charging pile cooling system and a control method thereof. Background Art

[0002] The rapid development of new energy vehicles has promoted the construction of a fast charging network with high charging power. However, the traditional air-cooled heat dissipation method has been difficult to meet the high heat dissipation requirements brought by high charging power fast charging.

[0003] In the current liquid-cooled charging pile market, the liquid-cooled systems of the vast majority of high-charging-power liquid-cooled DC charging piles usually directly enable the maximum cooling capacity and circulation speed to achieve the purpose of rapid temperature reduction. Although this cooling method can quickly reduce the temperature, it will cause unnecessary resource waste.

[0004] In addition, a fixed-gear liquid-cooled control strategy is usually adopted, and different preset levels are selected to adjust the cooling capacity and circulation speed. Although the control with a fixed-level cooling capacity and circulation speed is an improvement over no optimization at all, the fixed-level cooling control method cannot flexibly adjust the cooling intensity according to the actual operating state, which will make the operating temperature of the liquid-cooled charging pile relatively high, and may increase the safety risk of the system, resulting in an unsatisfactory cooling effect.

[0005] Therefore, the present invention provides a charging pile cooling system and a control method thereof. Summary of the Invention

[0006] The present invention provides a charging pile cooling system and a control method thereof, which can at least solve the problem that the fixed-level cooling control method in the prior art cannot flexibly adjust the cooling intensity according to the actual operating state, resulting in a relatively high operating temperature of the liquid-cooled charging pile, and may increase the safety risk of the system.

[0007] In a first aspect, an embodiment of the present application provides a charging pile cooling system. The charging pile cooling system includes a coolant pump, a coolant pump inlet pipe, and a coolant pump outlet pipe. The coolant pump outlet pipe is installed between the water outlet end of the coolant pump and the charging gun, and the coolant pump inlet pipe is installed between the charging gun and the water inlet end of the coolant pump; The charging pile cooling system further includes: An air temperature sampling sensor for collecting the ambient temperature ; A gun temperature sampling sensor for collecting the temperature of the charging gun ; A coolant pump inlet sampling sensor for collecting the temperature of the coolant pump inlet pipe ; Coolant pump outlet sampling sensor, used to collect the temperature of the coolant pump outlet pipeline ; Heat dissipation fan, used to drive air to dissipate heat from the charging pile; Charging control module, the charging control module is respectively signal-connected to the air temperature sampling sensor, gun temperature sampling sensor, coolant pump inlet sampling sensor and coolant pump outlet sampling sensor, and is used to receive temperature data; Power supply module, electrically connected to the charging gun through a charging power cable, and is used to convert AC power into DC power and transmit electric energy to the charging gun; The charging control module is connected to the power supply module and is used to collect the charging power of the power supply module ; The charging control module is also electrically connected to the heat dissipation fan and the coolant pump, and is used to control the rotation speeds of the heat dissipation fan and the coolant pump.

[0008] In a second aspect, an embodiment of the present application further provides a control method applied to the charging pile cooling system as described in the above aspects, and the method includes: Preset the threshold temperature of the charging gun; Collect the temperature of the charging gun; Compare the collected temperature of the charging gun with the threshold temperature of the charging gun; If the temperature of the charging gun is less than the threshold temperature of the charging gun, continue to collect the temperature of the charging gun; If the temperature of the charging gun is greater than or equal to the threshold temperature of the charging gun, call the fan and the cooling pump to cool down the charging gun.

[0009] Further, if the temperature of the charging gun is greater than or equal to the threshold temperature of the charging gun, calling the fan and the cooling pump to cool down the charging gun specifically includes: Calculate the heat generation of the charging gun; Determine the rotation speed of the coolant pump based on the heat generation of the charging gun; Determine the rotation speed of the fan based on the heat generation of the charging gun.

[0010] Further, calculating the heat generation of the charging gun specifically includes: Collect the charging power; Calculate the heat generation of the charging gun based on the collected charging power.

[0011] Further, the expression of the heat generation of the charging gun is: ; In the formula, represents the heat generation of the charging gun within time , represents the charging power, Indicates the charging efficiency of the charging gun.

[0012] Further, determining the rotational speed of the coolant pump based on the heat generation of the charging gun includes: Determining the required heat dissipation power based on the heat generation of the charging gun; Determining the required coolant flow rate based on the required heat dissipation power; Determining the target rotational speed of the coolant pump based on the required coolant flow rate.

[0013] Further, the expression for determining the required heat dissipation power based on the heat generation of the charging gun is:

[0014] In the formula: Indicates the required heat dissipation power, that is, the heat that needs to be dissipated per unit time; The expression for determining the required coolant flow rate based on the required heat dissipation power is:

[0015] In the formula, Indicates the required coolant flow rate, Indicates the density of the coolant, Indicates the specific heat capacity of the coolant, Indicates the temperature of the inlet pipe of the coolant pump, Indicates the temperature of the outlet pipe of the coolant pump; The expression for determining the target rotational speed of the coolant pump based on the required coolant flow rate is:

[0016] In the formula, Indicates the target rotational speed of the cooling pump, Indicates the rated rotational speed of the cooling pump, Indicates the rated flow rate of the coolant pump.

[0017] Further, determining the rotational speed of the fan based on the heat generation of the charging gun includes: Determining the required air flow rate based on the heat generation of the charging gun; Determining the target rotational speed of the fan based on the required air flow rate.

[0018] Further, the expression for determining the required air flow rate based on the heat generation of the charging gun is:

[0019] In the formula, Indicates the required air flow rate, Indicates the ambient temperature, represents the specific heat capacity of air, represents the temperature of the coolant pump outlet pipe.

[0020] Furthermore, the expression for determining the target speed of the fan based on the required air flow is:

[0021] In the formula, represents the target speed of the fan, represents the rated speed of the fan, represents the air flow, represents the rated air flow of the fan.

[0022] It can be seen from the above technical solutions that the present invention has the following advantages: In a charging pile cooling system and its control method provided by the present application, temperature data of key components of the charging pile are collected in real time through sensors, and at the same time, the charging power is collected; the operating states of the coolant pump and the fan of the charging pile can be flexibly adjusted to achieve faster and more accurate temperature control, effectively reducing the working temperature of the liquid-cooled DC charging pile with large charging power. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present application, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 is a flowchart of the control method for the charging pile cooling system.

[0025] Figure 2 is a system block diagram of the charging pile cooling system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the application purpose, features, and advantages of the present application more obvious and understandable, the technical solutions protected by the present application will be clearly and completely described below by using specific embodiments and the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this patent.

[0027] In a charging pile cooling system and its control method to be described in detail below, various embodiments of the present disclosure will be described more comprehensively. The present disclosure may have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to cover all adjustments, equivalents, and / or alternative solutions that fall within the spirit and scope of the various embodiments of the present disclosure.

[0028] Hereinafter, the term "comprising" or "may comprise" that can be used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present disclosure, the terms "comprising", "having" and their cognates are only intended to indicate a specific feature, number, step, operation, element, component, or a combination of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or a combination of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components, or a combination of the foregoing items.

[0029] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0030] Expressions (such as "first", "second", etc.) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0031] It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. Conversely, when one constituent element is "directly connected" to another constituent element, it can be understood that there is no third constituent element between the first constituent element and the second constituent element.

[0032] The term "user" used in various embodiments of the present disclosure may indicate a person who uses an electronic device, which may be a monitoring person, or a testing person, or an operating person.

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] The embodiment of the present application provides a charging pile cooling system and a control method thereof, which solve the technical problem that there is an urgent need for a fixed-level control cooling method at present, which cannot flexibly adjust the cooling intensity according to the actual operating state, resulting in a relatively high operating temperature of the liquid-cooled charging pile, and thus may increase the safety risk of the system.

[0035] The technical solutions proposed in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0036] A charging pile cooling system provided by an embodiment of the present application, the charging pile cooling system includes a coolant pump, a coolant pump inlet pipe, and a coolant pump outlet pipe. The coolant pump outlet pipe is installed between the water outlet end of the coolant pump and the charging gun, and the coolant pump inlet pipe is installed between the charging gun and the water inlet end of the coolant pump; the coolant pump is used to pump the coolant into the charging gun to dissipate heat from the charging gun; the circulation of the coolant is realized through the coolant pump, and thus the temperature of the charging gun is reduced.

[0037] The charging pile cooling system further includes: An air temperature sampling sensor for collecting the ambient temperature ; A gun temperature sampling sensor for collecting the temperature of the charging gun ; A coolant pump inlet sampling sensor for collecting the temperature of the coolant pump inlet pipe ; A coolant pump outlet sampling sensor for collecting the temperature of the coolant pump outlet pipe ; A cooling fan for driving air to dissipate heat from the charging pile; A charging control module, the charging control module is respectively signal-connected to the air temperature sampling sensor, the gun temperature sampling sensor, the coolant pump inlet sampling sensor, and the coolant pump outlet sampling sensor, and is used to receive the ambient temperature collected by the air temperature sampling sensor , the temperature of the charging gun collected by the gun temperature sampling sensor , the temperature of the coolant pump inlet pipe collected by the coolant pump inlet sampling sensor , the temperature of the coolant pump outlet pipe collected by the coolant pump outlet sampling sensor Temperature data etc.; A power supply module, electrically connected to the charging gun through a charging power cable, for converting an AC power supply into a DC power supply and transmitting electrical energy to the charging gun; The charging control module is connected to the power supply module, and is used for collecting the charging power of the power supply module ; The charging control module is also electrically connected to the cooling fan and the coolant pump, and is used for controlling the rotation speeds of the cooling fan and the coolant pump.

[0038] The charging control module is used for receiving the ambient temperature collected by the air temperature sampling sensor and the temperature of the charging gun collected by the gun temperature sampling sensor and the temperature of the coolant pump inlet pipeline collected by the coolant pump inlet sampling sensor and the temperature of the coolant pump outlet pipeline collected by the coolant pump outlet sampling sensor , the charging control module is also respectively connected to the coolant pump and the cooling fan, and based on the charging power and the ambient temperature collected by the air temperature sampling sensor and the temperature of the charging gun collected by the gun temperature sampling sensor and the temperature of the coolant pump inlet pipeline collected by the coolant pump inlet sampling sensor and the temperature of the coolant pump outlet pipeline collected by the coolant pump outlet sampling sensor adjust the rotation speeds of the coolant pump and the cooling fan; thus control the rotation speeds of the coolant pump and the cooling fan, and realize the dynamic adjustment of the charging pile cooling system.

[0039] The charging gun is a key component for power transmission between the charging pile and the electric vehicle. It transmits the electrical energy generated by the charging pile to the battery of the electric vehicle by inserting into the charging interface of the electric vehicle. The charging gun generates heat during operation, especially when charging at a high charging power. The charging power , the ambient temperature , the temperature of the charging gun , the temperature of the coolant pump inlet pipeline , the temperature of the coolant pump outlet pipeline are important parameters that the cooling system needs to monitor. The ambient temperature , the temperature of the charging gun , the temperature of the coolant pump inlet pipeline , the temperature of the coolant pump outlet pipeline are collected in real time through the air temperature sampling sensor, the gun temperature sampling sensor, the coolant pump inlet sampling sensor, and the coolant pump outlet sampling sensor; and the charging power is collected through the charging control module.

[0040] The charging control module can adjust the rotational speed of the coolant pump and the rotational speed of the fan according to the charging power , ambient temperature , the temperature of the charging gun , the temperature of the inlet pipe of the coolant pump , the temperature of the outlet pipe of the coolant pump to ensure that the charging gun operates within a safe temperature range and prevent damage or a decrease in charging efficiency caused by overheating.

[0041] The coolant pump drives the coolant to circulate, and the coolant pump absorbs the heat generated by the charging gun during the circulation process. The rotational speed of the coolant pump is adjusted by the charging control module according to the charging power , ambient temperature , the temperature of the charging gun , the temperature of the inlet pipe of the coolant pump , the temperature of the outlet pipe of the coolant pump .

[0042] The charging pile cooling system of the present invention can dynamically adjust the rotational speed of the coolant pump and the rotational speed of the cooling fan according to the actual working conditions to adjust the operating states of the coolant pump and the cooling fan in real time, achieve faster and more accurate temperature control, and effectively reduce the working temperature of the large charging power liquid-cooled DC charging pile.

[0043] Compared with the existing solutions, the charging pile cooling system proposed by the present invention significantly improves the adaptive ability and energy efficiency level of the charging pile cooling system, achieves the optimization of the rotational speed of the coolant pump and the rotational speed of the cooling fan, and comprehensively improves the safety and reliability of the charging pile under high-load working conditions.

[0044] The air temperature sampling sensor, the gun temperature sampling sensor, the coolant pump inlet sampling sensor, and the coolant pump outlet sampling sensor regularly report the collected temperature data to the charging control module.

[0045] A charging pile cooling system provided by the present invention can collect the temperature data of the key components of the charging pile in real time through sensors, and at the same time collect the charging power. It can flexibly adjust the operating states of the coolant pump and the fan according to the actual operating state, achieve faster and more accurate temperature control. It avoids the waste of resources in the traditional fixed-level control cooling method, and significantly improves the adaptive ability and energy efficiency level of the charging pile cooling system.

[0046] It can effectively reduce the working temperature of the large charging power liquid-cooled DC charging pile, ensure that the charging gun operates within a safe temperature range, and prevent damage or a decrease in charging efficiency caused by overheating. By dynamically adjusting the cooling intensity, it reduces the safety risks brought by the high-temperature operation of the system and improves the safety and reliability of the charging pile under high-load working conditions.

[0047] Precisely calculate the heat dissipation power, coolant flow rate, and fan speed required based on the heat generated by the charging gun to ensure the efficient operation of the cooling system under different working conditions. The rotation speeds of the coolant pump and the fan can be flexibly adjusted according to actual needs to adapt to different charging powers and environmental temperature conditions.

[0048] By effectively controlling the temperature of the charging gun, ensure that it operates within the optimal working temperature range, thereby improving the charging efficiency and reducing the charging time. Lowering the operating temperature of the charging gun and the cooling system reduces the thermal fatigue and wear of the equipment, extending the service life of the equipment.

[0049] Real-time monitor key parameters such as the environmental temperature, charging gun temperature, and coolant inlet and outlet temperatures through multiple sensors, and promptly detect and handle abnormal situations. The system can quickly respond based on real-time data and promptly adjust the cooling intensity to avoid system failures caused by excessive temperatures.

[0050] Through real-time monitoring and intelligent control, potential fault hazards can be detected in advance, the occurrence of sudden faults can be reduced, and the maintenance cost can be lowered. Automated control reduces manual intervention, simplifies the operation difficulty, and improves the usability and maintenance efficiency of the system.

[0051] The present invention also provides a control method applied to the charging pile cooling system described in the above embodiments. The method includes: Preset the threshold temperature of the charging gun; Collect the temperature of the charging gun; Compare the collected temperature of the charging gun with the threshold temperature of the charging gun; If the temperature of the charging gun is less than the threshold temperature of the charging gun, continue to collect the temperature of the charging gun; If the temperature of the charging gun is greater than or equal to the threshold temperature of the charging gun, call the fan and the cooling pump to cool down the charging gun.

[0052] Among them, if the temperature of the charging gun is greater than or equal to the threshold temperature of the charging gun, calling the fan and the cooling pump to cool down the charging gun specifically includes: Calculate the heat generated by the charging gun; Determine the rotation speed of the coolant pump based on the heat generated by the charging gun; Determine the rotation speed of the fan based on the heat generated by the charging gun.

[0053] Calculating the heat generated by the charging gun specifically includes: Collect the charging power, and calculate the heat generated by the charging gun based on the collected charging power. The expression for the heat generated by the charging gun is: ; In the formula, Indicates the heat generation of the charging gun at time within Indicates the charging power Indicates the charging efficiency of the charging gun.

[0054] Determining the rotational speed of the coolant pump based on the heat generation of the charging gun includes: Determining the required heat dissipation power based on the heat generation of the charging gun; Determining the required coolant flow rate based on the required heat dissipation power; Determining the target rotational speed of the coolant pump based on the required coolant flow rate.

[0055] According to an embodiment of the present application, determining the required heat dissipation power based on the heat generation of the charging gun, the expression thereof is:

[0056] In the formula: Indicates the required heat dissipation power, that is, the heat that needs to be dissipated per unit time; Determining the required coolant flow rate based on the required heat dissipation power, the expression thereof is:

[0057] In the formula, Indicates the required coolant flow rate, Indicates the density of the coolant, Indicates the specific heat capacity of the coolant, Indicates the temperature of the inlet pipe of the coolant pump, Indicates the temperature of the outlet pipe of the coolant pump; Determining the target rotational speed of the coolant pump based on the required coolant flow rate, the expression thereof is:

[0058] In the formula, Indicates the target rotational speed of the cooling pump, Indicates the rated rotational speed of the cooling pump, Indicates the rated flow rate of the coolant pump.

[0059] Determining the rotational speed of the fan based on the heat generation of the charging gun includes: Determining the required air flow rate based on the heat generation of the charging gun; Determining the target rotational speed of the fan based on the required air flow rate.

[0060] Determining the required air flow rate based on the heat generation of the charging gun, the expression is:

[0061] In the formula, Indicates the required air flow rate, represents the ambient temperature, represents the specific heat capacity of air, represents the temperature of the coolant pump outlet pipe.

[0062] Determine the target speed of the fan based on the required air flow rate, and the expression is:

[0063] In the formula, represents the target speed of the fan, represents the rated speed of the fan, represents the air flow rate, represents the rated air flow rate of the fan.

[0064] A control method for a charging pile cooling system provided by the present invention can collect the temperature data of key components of the charging pile in real time through sensors, and at the same time collect the charging power, and can flexibly adjust the operating states of the coolant pump and the fan according to the actual operating state, so as to achieve faster and more accurate temperature control. It avoids the waste of resources in the traditional fixed-level control cooling method, and significantly improves the adaptive ability and energy efficiency level of the charging pile cooling system.

[0065] It can effectively reduce the working temperature of the large charging power liquid-cooled DC charging pile, ensure that the charging gun works within a safe temperature range, and prevent damage or a decrease in charging efficiency caused by overheating. By dynamically adjusting the cooling intensity, the safety risks brought by the system running at high temperature are reduced, and the safety and reliability of the charging pile under high-load conditions are improved.

[0066] Precisely calculate the required heat dissipation power, coolant flow rate and fan speed based on the heat generation of the charging gun to ensure that the cooling system can operate efficiently under different working conditions. The speeds of the coolant pump and the fan can be flexibly adjusted according to actual needs to adapt to different charging power and ambient temperature conditions.

[0067] By effectively controlling the temperature of the charging gun, ensure that it operates within the optimal working temperature range, thereby improving the charging efficiency and reducing the charging time. Reducing the operating temperature of the charging gun and the cooling system reduces the thermal fatigue and wear of the equipment and extends the service life of the equipment.

[0068] Real-time monitor key parameters such as ambient temperature, charging gun temperature, coolant inlet and outlet temperatures, etc. through multiple sensors, and discover and handle abnormal situations in time. The system can quickly respond according to real-time data and adjust the cooling intensity in time to avoid system failures caused by too high temperature.

[0069] Through real-time monitoring and intelligent control, potential fault hazards can be detected in advance, the occurrence of sudden failures can be reduced, and the maintenance cost can be lowered. The automatic control reduces manual intervention, eases the operation difficulty, and improves the system's usability and maintenance efficiency.

[0070] Set a safe temperature upper limit to ensure that the charging gun operates without exceeding this temperature. By setting the threshold temperature, the system can automatically monitor and control the temperature of the charging gun to avoid overheating.

[0071] Monitor the temperature of the charging gun in real time to ensure it is within a safe range. By collecting temperature data in real time, the system can promptly detect temperature anomalies and take measures.

[0072] Compare the temperature of the charging gun with the threshold temperature to determine whether to activate the cooling system. By comparing the actual temperature with the threshold temperature, the system can intelligently decide whether cooling treatment is required.

[0073] Invoke the fan and cooling pump for cooling treatment. When the temperature of the charging gun exceeds the threshold, activate the cooling system for cooling. By invoking the fan and cooling pump, the system can quickly reduce the temperature of the charging gun to ensure it operates within a safe range.

[0074] Calculate the heat generation of the charging gun based on the charging power and charging efficiency. By accurately calculating the heat generation, the system can more precisely determine the required cooling intensity.

[0075] Determine the rotational speed of the coolant pump according to the heat generation to provide sufficient coolant flow. By dynamically adjusting the rotational speed of the coolant pump, the system can ensure that the coolant flow matches the heat generation and improve the cooling efficiency.

[0076] Determine the rotational speed of the fan according to the heat generation to provide sufficient air flow. By dynamically adjusting the rotational speed of the fan, the system can ensure that the air flow matches the heat generation and improve the heat dissipation effect.

[0077] The control method of the charging pile cooling system of the present invention realizes the dynamic regulation of the cooling system, effectively reduces the operating temperature, improves the charging efficiency and system reliability, reduces the maintenance cost, and provides a strong guarantee for the efficient and safe operation of high-power liquid-cooled DC charging piles.

[0078] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0079] Without departing from the principles and spirit of the present invention, such changes, modifications, substitutions and variations to the embodiments still fall within the protection scope of the present invention.

Claims

1. A charging pile cooling system, characterized in that The charging pile cooling system includes a coolant pump, a coolant pump inlet pipe, and a coolant pump outlet pipe. The coolant pump outlet pipe is installed between the water outlet end of the coolant pump and the charging gun, and the coolant pump inlet pipe is installed between the charging gun and the water inlet end of the coolant pump; The charging pile cooling system further includes: Air temperature sampling sensor, used to collect ambient temperature ; Gun temperature sampling sensor, used to collect the temperature of the charging gun ; Coolant pump inlet sampling sensor, used to collect the temperature of the coolant pump inlet pipeline ; Coolant pump outlet sampling sensor, used to collect the temperature of the coolant pump outlet pipeline ; A cooling fan for driving air to dissipate heat from the charging pile; A charging control module, which is respectively connected to an air temperature sampling sensor, a gun temperature sampling sensor, a coolant pump inlet sampling sensor, and a coolant pump outlet sampling sensor for receiving temperature data; A power module, which is electrically connected to the charging gun through a charging power cable and is used to convert AC power into DC power and transmit electric energy to the charging gun; The charging control module is connected to the power module and is used to collect the charging power of the power module ; The charging control module is also electrically connected to the cooling fan and the coolant pump for controlling the rotation speeds of the cooling fan and the coolant pump.

2. A control method applied to the charging pile cooling system as described in claim 1, characterized in that, The method includes: Presetting a threshold temperature of the charging gun in advance; Collecting the temperature of the charging gun; Comparing the collected temperature of the charging gun with the threshold temperature of the charging gun; If the temperature of the charging gun is less than the threshold temperature of the charging gun, continue to collect the temperature of the charging gun; If the temperature of the charging gun is greater than or equal to the threshold temperature of the charging gun, call the fan and the cooling pump to cool the charging gun.

3. The charging pile cooling system according to claim 2, wherein, If the temperature of the charging gun is greater than or equal to the threshold temperature of the charging gun, calling the fan and the cooling pump to cool the charging gun specifically includes: Calculating the heat generation of the charging gun; Determining the rotation speed of the coolant pump based on the heat generation of the charging gun; Determining the rotation speed of the fan based on the heat generation of the charging gun.

4. The charging pile cooling system according to claim 3, wherein, Calculating the heat generation of the charging gun specifically includes: Collecting the charging power; Calculating the heat generation of the charging gun based on the collected charging power.

5. The method according to claim 4, characterized in that, The expression for the heat generation of the charging gun is: ； Wherein, represents the heat generation of the charging gun at time ; represents the charging power, represents the charging efficiency of the charging gun.

6. The method according to claim 5, wherein Determining the rotation speed of the coolant pump based on the heat generation of the charging gun includes: Determining the required heat dissipation power based on the heat generation of the charging gun; Determining the required coolant flow rate based on the required heat dissipation power; Determining the target rotation speed of the coolant pump based on the required coolant flow rate.

7. The method according to claim 6, wherein The expression for determining the required heat dissipation power based on the heat generation of the charging gun is: In the formula: represents the required heat dissipation power, that is, the heat to be dissipated per unit time; The expression for determining the required coolant flow rate based on the required heat dissipation power is: In the formula, represents the required flow rate of the coolant, represents the density of the coolant, represents the specific heat capacity of the coolant, represents the temperature of the inlet pipe of the coolant pump, represents the temperature of the outlet pipe of the coolant pump; The expression for determining the target rotation speed of the coolant pump based on the required coolant flow rate is: Wherein, represents the target speed of the cooling pump, represents the rated speed of the cooling pump, represents the rated flow rate of the coolant pump.

8. The method according to claim 4, wherein Determining the rotation speed of the fan based on the heat generation of the charging gun includes: Determining the required air flow rate based on the heat generation of the charging gun; Determining the target rotation speed of the fan based on the required air flow rate.

9. The method according to claim 8, wherein The expression for determining the required air flow rate based on the heat generation of the charging gun is: In the formula, represents the required air flow rate, represents the ambient temperature, represents the specific heat capacity of air, represents the temperature of the coolant pump outlet pipe.

10. The method according to claim 9, characterized in that The expression for determining the target rotation speed of the fan based on the required air flow rate is: In the formula, represents the target speed of the fan, represents the rated speed of the fan, represents the air flow rate, represents the rated air flow rate of the fan.

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