A control method of a high-power charging cooling system

Abstract

The application discloses a control method of a high-power charging cooling system, the high-power charging cooling system comprising a charging connection device temperature sensor and a first cooling system connected with the charging connection device through heat exchange, the control method comprising the following steps: S1, a charging equipment controller sends a starting signal to a communication module, and a high-power charging cooling system controller is powered on; and S8, an AD module detects a heat storage device temperature sensor value T1 every time interval t2, and judges a difference between the heat storage device temperature sensor value T1 and a target value Ta. The control method of the high-power charging cooling system can improve the energy utilization rate and reduce the loss, can reduce noise pollution and the influence on ambient air temperature, can effectively increase the service life of system components, and can be self-adaptively adjusted according to actual operation conditions.

Description

Technical Field

[0001] This invention relates to the field of charging cooling systems and control methods for charging cooling systems, and specifically to a control method for a high-power charging cooling system. Background Technology

[0002] Currently, most high-power charging equipment uses air-cooled radiators to directly discharge the heat loss generated by the conductor into the ambient air during the charging process of new energy vehicles. This results in energy waste and limited cooling effect. Especially in hot areas, the ambient temperature of the charging station space may even rise. Using this relatively hot ambient air as a heat exchange medium further weakens the heat dissipation effect, causing the temperature rise of the charging conductor to increase. Furthermore, the forced cooling fan often needs to run at high speed to cool the heat generated by the high-power charging conductor as much as possible. For charging installations installed in office buildings and residential areas, this causes a certain amount of noise pollution.

[0003] Currently, high-power charging equipment is operated year-round. However, in winter or cold regions, the viscosity of the cooling circulating medium increases, and the flow resistance of the cooling system increases. This can lead to insufficient torque in the liquid cooling pump, resulting in start-up failure, or excessive system pressure, causing leakage. This greatly limits its application in low-temperature regions.

[0004] Currently, manufacturers of high-power charging cooling systems mainly focus on heat dissipation in their design and control. They cannot automatically adjust their control strategies according to real-time conditions and lack the ability to adapt to changing operating conditions. Their environmental friendliness and reliability need to be further improved. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a control method for a high-power charging cooling system, which can improve energy utilization and reduce losses, reduce noise pollution and the impact on ambient air temperature, effectively increase the lifespan of system components, and can adaptively adjust according to actual operating conditions to better adapt to various environmental conditions.

[0006] The objective of this invention is achieved through the following technical solution.

[0007] This invention provides a control method for a high-power charging cooling system. The high-power charging cooling system includes a charging connection device temperature sensor for detecting the temperature of the charging connection device; a primary cooling system that heat-exchanges with the charging connection device, the primary cooling system being heat-exchange connected to a high-power charging cooling secondary system; and a high-power charging cooling system controller that is signal-connected to the charging connection device and communication-connected to a charging device controller. The high-power charging cooling system controller controls and connects the primary cooling system and the high-power charging cooling secondary system. The high-power charging cooling secondary system includes a heat storage device and a heat dissipation device, the heat storage device and the heat dissipation device being connected... The device is connected to a hot water pump via a three-way regulating valve, which is connected to the primary cooling system via the hot water pump. The heat dissipation device includes a cooling fan. The high-power charging cooling system controller controls the three-way regulating valve. The primary cooling system includes a liquid-cooled pump for delivering circulating cooling medium to the charging connection device and a pressure sensor for monitoring the pressure of the circulating cooling medium. The heat storage device includes a heat storage device temperature sensor. The high-power charging cooling secondary system includes a working fluid outlet temperature sensor and a working fluid inlet temperature sensor, and an ambient temperature sensor. The high-power charging cooling secondary system controller includes an MCU. The system includes a main control module, a communication module for communicating with the charging equipment controller, a liquid cooling pump DO module for controlling the output of the liquid cooling pump, a cooling fan DO module for controlling the output of the cooling fan, a hot water pump DO module for controlling the output of the hot water pump, a three-way regulating valve DO module for controlling the output of the three-way regulating valve, a liquid cooling pump DI module for detecting the operating status of the liquid cooling pump, a cooling fan DI module for detecting the operating status of the cooling fan, a hot water pump DI module for detecting the operating status of the hot water pump, a three-way regulating valve DI module for detecting the opening degree of the three-way regulating valve, and an AD module for inputting signals from the pressure sensor and various temperature sensors. The present invention also provides a method for controlling the above-mentioned high-power charging cooling system, the control method comprising the following steps: Step S1, the charging equipment controller sends a start signal to the communication module, and the high-power charging cooling system controller is powered on; Step S2, fault detection is performed, including detecting whether the communication is normal, detecting whether the pressure of the circulating cooling medium is normal, and detecting whether the measured values ​​of each temperature sensor are normal. If an abnormality is found, a fault alarm is output immediately; Step S3, it is determined whether the ambient temperature exceeds the operating range. If an abnormality is found, an ambient temperature alarm is output immediately. If the ambient temperature does not exceed the operating range, the fault detection is repeated at certain intervals and the process proceeds to Step S4.Step S4: Detect the temperature sensor values ​​T1 of the heat storage device, T2 of the ambient temperature sensor, and T5 of the charging connection device collected by the AD module to determine if it is a low-temperature start. If it is not a low-temperature start, proceed to step S5; if it is a low-temperature start, proceed to step S6. Step S5: Detect the temperature sensor value T1 of the heat storage device to determine if the heat storage device has sufficient heat for preheating. If the heat is sufficient, control the three-way regulating valve to open at an opening degree a%, and the hot water pump runs at 80% speed for time t1 to preheat the circulating cooling medium. Then proceed to step S6. If the heat storage device does not have sufficient heat, proceed directly to step S6. Step S6: The heat storage and release working fluid and the circulating cooling medium are output according to the start-up settings. Step S7: After the high-power charging cooling system is started, it enters the operation adjustment stage. After entering the operation adjustment stage, it also includes step S8: The AD module... (The text abruptly ends here, likely due to an incomplete sentence or a formatting error.) The temperature sensor value T1 of the heat storage device is detected, and the difference between T1 and the target value Ta is determined. If the difference between T1 and Ta is greater than U, it means that the heat storage device is far from reaching heat saturation. The MCU main control module controls the opening of the three-way regulating valve to 100% so that all the heat storage and release working fluid enters the heat storage device for heat release. When the difference between T1 and Ta is between U and V, it means that the heat storage device has not yet reached heat saturation. The MCU main control module controls the opening of the three-way regulating valve to b%, so that part of the heat storage and release working fluid enters the heat storage device for heat release, and the other part of the heat storage and release working fluid enters the heat dissipation device for heat dissipation. When the difference between T1 and Ta is between W and V, it means that the heat storage device is close to reaching heat saturation. The MCU main control module controls the opening of the three-way regulating valve to c%. When the difference between T1 and Ta is less than W, it means that the heat storage device has reached heat saturation. At this time, the MCU main control module controls the opening of the three-way regulating valve to 0%, so that all the heat storage and release working fluid enters the heat dissipation device for heat dissipation.

[0008] Preferably, the primary cooling system includes a partition wall heat exchanger, and the liquid cooling pump is connected to the inner cavity of the partition wall heat exchanger.

[0009] Preferably, after entering the operation adjustment stage, the method further includes step S9, whereby the AD module detects the temperature sensor value T5 of the charging connection device every time interval t3, and determines whether T5 is greater than 50 degrees Celsius. If not, the MCU main control module controls the liquid cooling pump to output 0%; if so, it further determines whether T5-T5' is less than A. If so, it means that T5 is decreasing, and the MCU main control module controls the liquid cooling pump to decelerate by n% until the minimum operating speed. If T5-T5' is between A and B, the MCU main control module controls the liquid cooling pump to run at the existing speed; if T5-T5' is between B and C, the MCU main control module controls the liquid cooling pump to accelerate by n%; if T5-T5' is between C and D, the MCU main control module controls the liquid cooling pump to accelerate by 2n%; if T5-T5' is greater than D, the MCU main control module controls the liquid cooling pump to run at 100% speed, where T5' is the previous detection value of the charging connection device temperature sensor.

[0010] Preferably, after entering the operation adjustment stage, the method further includes step S10, whereby the AD module detects the inlet temperature T3 and outlet temperature T4 of the heat storage and release working fluid at time intervals t4, and determines whether T4 is greater than 40 degrees Celsius. If not, the MCU main control module controls the hot water pump to operate at the lowest speed. If so, it further determines whether T4-T3 is less than X. If so, it means that the current temperature rise of the heat storage and release working fluid is small, the flow rate of the heat storage and release working fluid is too large, or the heat dissipation is small. The MCU main control module controls the hot water pump to decelerate by n% until the minimum operating speed is reached. If T4-T3 is between X and Y, the MCU main control module controls the hot water pump to operate at the existing speed. If T4-T3 is between Y and Z, the MCU main control module controls the hot water pump to accelerate by n%. If T4-T3 is greater than Z, the MCU main control module controls the hot water pump to operate at 100% speed.

[0011] Preferably, after entering the operation and adjustment stage, the method further includes step S11, where the AD module detects the opening degree of the three-way regulating valve every time interval t5. If the opening degree of the three-way regulating valve is equal to 100%, it means that all the heat storage and release working fluid enters the heat storage device to release heat, and the MCU main control module controls the cooling fan to output at 0%; if the opening degree of the three-way regulating valve is not equal to 100%, then the method proceeds to step S12: the AD module detects the inlet temperature value T3 of the heat storage and release working fluid and the ambient temperature sensor value T2, and determines whether T3 is greater than 35 degrees Celsius. If not, it means that the heat storage and release working fluid has a large heat absorption capacity. To avoid the viscosity increase caused by the low temperature of the circulating cooling medium, the MCU main control module... The CU main control module controls the cooling fan to output at 0%; if T3 is greater than 35 degrees Celsius, it further determines whether T3-T2 is less than J. If so, it means that the current heat storage and release working fluid is close to the ambient temperature, the cooling fan speed is too high or the heat dissipation is too low. The MCU main control module controls the cooling fan to decelerate by n% until the minimum operating speed. If T3-T2 is between J and K, the MCU main control module controls the cooling fan to run at the current speed. If T3-T2 is between K and L, the MCU main control module controls the cooling fan to accelerate by 2n%. If T4-T3 is greater than L, the MCU main control module controls the cooling fan to run at 100% speed.

[0012] Preferably, after entering the operation adjustment stage, the system further includes step S13: when the high-power charging cooling system controller receives the shutdown command from the charging equipment controller, the MCU main control module controls the liquid cooling pump to shut down after a 20-second delay, and then shuts down the hot water pump after a 20-second delay after shutting down the liquid cooling pump. After shutting down the hot water pump, the opening of the three-way regulating valve is adjusted to 100% after 5 seconds. After the opening of the three-way regulating valve is adjusted, the cooling fan is shut down 15 seconds later, thus ending the shutdown command.

[0013] Compared with the prior art, the beneficial effects of this invention are: by setting the control method of the above-mentioned high-power charging cooling system, the energy utilization rate can be improved and the loss can be reduced, noise pollution and the impact on the ambient air temperature can be reduced, the life of system components can be effectively increased, and adaptive adjustment can be made according to the actual operating conditions to better adapt to various environmental conditions. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the connection structure between the high-power charging cooling system controller, the charging equipment, and the cooling system of the present invention.

[0015] Appendix Figure 2 This is a schematic diagram showing the connection between the high-power charging cooling system controller of the present invention and various detection elements and controlled objects.

[0016] Appendix Figure 3 This is a block diagram of the high-power charging cooling system controller of the present invention.

[0017] Appendix Figure 4 The flowcharts are for the fault detection method and the power-on control method of the present invention.

[0018] Appendix Figure 5 This is a flowchart of the control method for the operation of the three-way regulating valve of the present invention.

[0019] Appendix Figure 6 This is a flowchart of the control method for the liquid-cooled pump of the present invention.

[0020] Appendix Figure 7 This is a flowchart of the control method for the hot water pump of the present invention.

[0021] Appendix Figure 8 This is a flowchart of the control method for the cooling fan of the present invention.

[0022] Appendix Figure 9 This is a flowchart of the shutdown control method for the high-power charging cooling system of the present invention.

[0023] Labeling explanation: 1. Charging connection device; 2. Primary cooling system; 3. High-power charging cooling system controller; 4. High-power charging cooling secondary system; 401. Cooling fan; 402. Three-way regulating valve. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] The high-power charging cooling system of the present invention, such as Figure 1 and Figure 2 As shown: It includes a charging connection device temperature sensor for detecting the temperature of the charging connection device 1; it also includes a primary cooling system 2 that heat-exchanges with the charging connection device 1. In other words, the heat-exchange connected charging connection device 1 and the primary cooling system 2 are connected to form a cooling circulation loop through corresponding pipes. The circulating cooling medium flows in the aforementioned cooling circulation loop, thereby carrying away the heat from the charging connection device 1. The primary cooling system 2 is used to cool the circulating cooling medium. The primary cooling system 2 is heat-exchange connected to a high-power charging cooling secondary system 4. Similarly, the primary cooling system 2 and the high-power charging cooling secondary system 4 are connected to form a heat exchange loop through corresponding pipes. The high-power charging cooling system of this invention also includes a high-power charging cooling system controller 3 that is signal-connected to the charging connection device 1 and communication-connected to the charging device controller. In other words, the high-power charging cooling system controller 3 can acquire data from the charging connection device temperature sensor, and the high-power charging cooling system controller 3 controls the connection between the primary cooling system 2 and the high-power charging cooling secondary system 4. Figure 2 As shown, the high-power charging and cooling secondary system 4 includes a heat storage device and a heat dissipation device. The heat storage device and the heat dissipation device are connected to a hot water pump via a three-way regulating valve 402. The three-way regulating valve 402 is connected to the primary cooling system 2 via the hot water pump. The three-way regulating valve 402 distributes the heat storage and release working medium (which can be water) drawn from the primary cooling system 2 by the hot water pump to the heat storage device and the heat dissipation device. Driven by the hot water pump, the heat storage and release working medium flows back to the primary cooling system 2 after flowing through the heat storage device or the heat dissipation device, thus forming the aforementioned heat exchange loop. Figure 2 As shown, the heat dissipation device includes a cooling fan 401. The airflow generated by the cooling fan 401 flows over the surface of the heat dissipation device, while the heat storage and release working fluid flows through the internal structure of the heat dissipation device, thereby dissipating the heat of the heat storage and release working fluid flowing through the heat dissipation device into the air. For example, the heat dissipation device may include a finned radiator of the prior art; the heat storage device includes a heat storage material of the prior art, and the heat storage and release working fluid exchanges heat with the aforementioned heat storage material when flowing through the heat storage device. Figure 2 As shown, the high-power charging cooling system controller 3 controls the three-way regulating valve 402. The primary cooling system 2 includes a liquid-cooled pump for delivering the circulating cooling medium to the charging connection device 1 and a pressure sensor for monitoring the pressure of the circulating cooling medium. That is, the circulating cooling medium flows in the aforementioned cooling circulation loop. Figure 2 As shown, the heat storage device includes a heat storage device temperature sensor, which is used to detect the current temperature value of the aforementioned heat storage material; the high-power charging and cooling secondary system 4 includes a working fluid outlet temperature sensor and a working fluid inlet temperature sensor. The working fluid outlet temperature sensor is used to detect the temperature of the heat storage and release working fluid discharged from the high-power charging and cooling secondary system 4, and the working fluid inlet temperature sensor is used to detect the temperature of the heat storage and release working fluid at the inlet of the high-power charging and cooling secondary system 4 (which is also approximately the temperature of the heat storage and release working fluid flowing out of the primary cooling system 2). The high-power charging and cooling secondary system 4 includes an ambient temperature sensor for detecting the external ambient temperature.

[0026] The high-power charging cooling system controller 3 is connected to the charging equipment controller through a communication module to control the operation of the high-power charging cooling system. The high-power charging cooling system controller 3, the charging connection device 1, the primary cooling system 2, and the high-power charging cooling secondary system 4 control the output of the high-power charging cooling system through data acquisition and calculation, so as to realize heat transfer and perform operation adjustment.

[0027] During operation, the high-power charging cooling system controller 3 uses the AD module to input the collected temperature sensor signals into the MCU main control module for operation monitoring. It prioritizes the heat loss generated by the charging connection device 1 to flow through the heat storage device to store the heat. The stored heat can be used for winter heating and domestic hot water in the station or other places, and its heat recovery can be converted into a high-grade heat source. This process does not require the operation of a cooling fan, achieving low-noise heat energy recovery and having high environmental friendliness.

[0028] The charging equipment controller controls the output energy of the charging equipment via a communication protocol, while simultaneously sending start / stop commands to the high-power charging cooling system controller 3 and receiving fault information and parameters from the high-power charging cooling system controller 3. The high-power charging cooling system controller 3 uses temperature and pressure data from the charging connection device 1, the primary cooling system 2, and the high-power charging cooling secondary system 4 to determine if there is a fault, if the system exceeds safe operating limits, and adjusts the system based on temperature parameters to ensure efficient, safe, and reliable high-power charging. During charging, the heat generated by the charging cable of the charging connection device 1 is transferred to the high-power charging cooling primary cooling system 2 and then to the high-power charging cooling secondary system 4. The high-power charging cooling system controller 3 uses the collected temperature data to determine the optimal energy storage method (i.e., the preferred input of the heat storage / dissipation medium to the heat storage device via the three-way regulating valve 402). Excess heat is then exchanged externally (i.e., the preferred input of the heat storage / dissipation medium to the heat dissipation device via the three-way regulating valve 402).

[0029] When the system is running, the charging device transfers the heat loss of the charging connection device 1 to the circulating cooling medium during the charging process. Driven by the liquid cooling pump, the circulating cooling medium transfers the heat to the heat storage medium in the indirect heat exchanger of the primary cooling system 2. After releasing the heat, the temperature of the circulating cooling medium decreases, and it re-enters the liquid cooling pump to be transported to the charging connection device 1 to absorb the heat generated by the charging connection device 1. This cycle continues, ensuring that the charging connection device 1 operates safely and reliably while reducing its temperature, thereby reducing heat generation and improving charging conversion efficiency. After absorbing heat, the heat storage medium, driven by the hot water pump, preferably enters the heat storage device to transfer the heat to the heat storage material, thus lowering the temperature of the heat storage medium before entering the indirect heat exchanger to absorb heat, making full use of the heat loss generated by the charging connection device 1. When the heat storage material in the heat storage device approaches or has reached the set temperature, the three-way regulating valve adjusts the amount of heat storage medium entering the heat storage device, diverting some or all of the heat storage medium to the heat dissipation device, where the heat is transferred to the air by the cooling fan, thereby lowering the temperature of the heat storage medium.

[0030] Furthermore, such as Figure 3As shown, the high-power charging cooling system controller 3 includes an MCU main control module, a communication module for communicating with the charging equipment controller, a liquid cooling pump DO module for controlling the output of the liquid cooling pump, a cooling fan DO module for controlling the output of the cooling fan 401, a hot water pump DO module for controlling the output of the hot water pump, a three-way regulating valve DO module for controlling the output of the three-way regulating valve 402, a liquid cooling pump DI module for detecting the operating status of the liquid cooling pump, a cooling fan DI module for detecting the operating status of the cooling fan 402, a hot water pump DI module for detecting the operating status of the hot water pump, a three-way regulating valve DI module for detecting the opening degree of the three-way regulating valve 402, and an AD module for inputting signals from pressure sensors and various temperature sensors. All of the above modules are connected to the MCU main control module for data transmission.

[0031] Furthermore, such as Figure 2 As shown, the primary cooling system 2 includes a partition wall heat exchanger. A liquid cooling pump is connected to the inner cavity of the partition wall heat exchanger. In other words, the circulating cooling medium flows through the internal pipes of the partition wall heat exchanger. The structure of the partition wall heat exchanger is existing technology. It is simple in structure, easy to manufacture, and has a low cost.

[0032] The temperature values ​​detected by each temperature sensor are represented as follows: T1 for the heat storage device temperature sensor, T2 for the ambient temperature sensor, T3 for the inlet temperature of the heat storage / releasing working fluid, T4 for the outlet temperature of the heat storage / releasing working fluid, and T5 for the charging connection device temperature sensor. The target temperature value Ta for the heat storage device and the previous detection value T5' for the charging connection device temperature sensor are also represented.

[0033] like Figure 4 As shown, the control method for the high-power charging cooling system described above includes the following steps: Step S1: The charging equipment controller sends a start signal to the communication module, and the high-power charging cooling system controller 3 is powered on. Step S2: Perform fault detection, including checking whether the communication is normal, checking whether the pressure of the circulating cooling medium is normal, and checking whether the measured values ​​of each temperature sensor are normal. If any abnormality is found, a fault alarm will be output immediately. Step S3: Determine whether the ambient temperature exceeds the operating range. If an abnormality occurs, output an ambient temperature alarm immediately. If the ambient temperature does not exceed the operating range, repeat the fault detection at certain intervals and proceed to step S4. Step S4: Detect the temperature sensor values ​​T1 of the heat storage device, T2 of the ambient temperature sensor, and T5 of the charging connection device collected by the AD module, and determine whether it is a low-temperature start (a low-temperature start means that T2 and T5 are less than 0 degrees Celsius). If it is not a low-temperature start, proceed to step S5; if it is a low-temperature start, proceed to step S6. Step S5: detecting the value T1 of the temperature sensor of the heat storage device to determine whether the heat storage device has sufficient heat for preheating; if the heat is sufficient, controlling the three-way regulating valve 402 to open at an opening of a%, and operating the hot water pump at 80% of the rotating speed for a time period t1 to preheat the circulating cooling medium, then proceeding to step S6; if the heat of the heat storage device is insufficient, proceeding directly to step S6; Step S6: outputting the heat storage and release working medium and the circulating cooling medium according to the power-on setting; Step S7: after the high-power charging cooling system is started, entering an operation adjustment stage.

[0034] As shown in Figure 5 , after entering the operation adjustment stage, the method further comprises step S8: the AD module detects the value T1 of the temperature sensor of the heat storage device every time interval t2, and judges the difference between the value T1 of the temperature sensor of the heat storage device and a target value Ta (the value of Ta is specifically related to the type of heat storage material, for example, it can be 70 degrees Celsius); if the difference between T1 and Ta is greater than U, it means that the heat storage device is far from heat saturation, and the MCU main control module controls the opening of the three-way regulating valve 402 to 100%, so that all the heat storage and release working medium enters the heat storage device for heat release; when the difference between T1 and Ta is between U and V, it means that the heat storage device has not reached heat saturation, and the MCU main control module controls the opening of the three-way regulating valve 402 to b%, so that a part of the heat storage and release working medium enters the heat storage device for heat release, and the other part of the heat storage and release working medium enters the heat dissipation device for heat dissipation; when the difference between T1 and Ta is between W and V, it means that the heat storage device is close to heat saturation, and the MCU main control module controls the opening of the three-way regulating valve 402 to c%, that is, a larger proportion of the heat storage and release working medium enters the heat dissipation device for heat dissipation; when the difference between T1 and Ta is less than W, it means that the heat storage device reaches heat saturation, and at this time the MCU main control module controls the opening of the three-way regulating valve 402 to 0%, so that all the heat storage and release working medium enters the heat dissipation device for heat dissipation. Wherein, W<V<U, opening b% > opening c%, and the above W, V, U, a%, b% and c% can all be adjusted correspondingly according to actual application conditions.

[0035] As shown in Figure 6As shown, after entering the operation adjustment stage, step S9 is also included. The AD module detects the temperature sensor value T5 of the charging connection device every time t3 and determines whether T5 is greater than 50 degrees Celsius. If not (meaning the temperature of the charging connection device 1 is low and cooling is not required), the MCU main control module controls the liquid cooling pump output to 0%, which is beneficial for energy saving. If so (meaning the temperature of the charging connection device 1 is high and cooling is required), it further determines whether T5-T5' is less than A. If so, it means that T5 is decreasing, and the MCU main control module controls the liquid cooling pump to decelerate by n% until the minimum operating speed. If T5-T5' is between A and B, the MCU main control module controls the liquid cooling pump to run at the current speed. If T5-T5' is between B and C, the MCU main control module controls the liquid cooling pump to accelerate by n%. If T5-T5' is between C and D, the MCU main control module controls the liquid cooling pump to accelerate by 2n%. If T5-T5' is greater than D, the MCU main control module controls the liquid cooling pump to run at 100% speed.

[0036] like Figure 7 As shown, after entering the operation adjustment stage, step S10 is also included. The AD module detects the inlet temperature T3 and outlet temperature T4 of the heat storage and release working medium at time intervals t4, and determines whether T4 is greater than 40 degrees Celsius. If not, the MCU main control module controls the hot water pump to run at the minimum speed. If so, it further determines whether T4-T3 is less than X. If so, it means that the current temperature rise of the heat storage and release working medium is small, the flow rate of the heat storage and release working medium is too large, or the heat dissipation is small. The MCU main control module controls the hot water pump to decelerate by n% until the minimum operating speed. If T4-T3 is between X and Y, the MCU main control module controls the hot water pump to run at the current speed. If T4-T3 is between Y and Z, the MCU main control module controls the hot water pump to accelerate by n%. If T4-T3 is greater than Z, the MCU main control module controls the hot water pump to run at 100% speed.

[0037] like Figure 8As shown, after entering the operation and adjustment stage, step S11 is also included. The AD module checks the opening degree of the three-way regulating valve 402 every time t5. If the opening degree of the three-way regulating valve 402 is equal to 100%, it means that all the heat storage and release working fluid enters the heat storage device to release heat, and the MCU main control module controls the cooling fan to output at 0%; if the opening degree of the three-way regulating valve 402 is not equal to 100%, then step S12 is entered: the AD module detects the inlet temperature value T3 of the heat storage and release working fluid and the ambient temperature sensor value T2 to determine whether T3 is greater than 35 degrees Celsius. If not, it means that the heat storage and release working fluid has a large heat absorption capacity. In order to avoid the low temperature of the circulating cooling medium, As viscosity increases, the MCU main control module controls the cooling fan to output at 0%. If T3 is greater than 35 degrees Celsius, it further determines whether T3-T2 is less than J. If so, it means that the current heat storage and release working fluid is close to the ambient temperature, the cooling fan speed is too high or the heat dissipation is too low. The MCU main control module controls the cooling fan to decelerate by n% until the minimum operating speed. If T3-T2 is between J and K, the MCU main control module controls the cooling fan to run at the current speed. If T3-T2 is between K and L, the MCU main control module controls the cooling fan to accelerate by 2n%. If T4-T3 is greater than L, the MCU main control module controls the cooling fan to run at 100% speed.

[0038] like Figure 9 As shown, after entering the operation adjustment stage, step S13 is also included. When the high-power charging cooling system controller 3 receives the shutdown command from the charging equipment controller, the MCU main control module controls the liquid cooling pump to shut down after a 20s delay. After shutting down the liquid cooling pump, the hot water pump is shut down after a 20s delay. After shutting down the hot water pump, the opening of the three-way regulating valve 402 is adjusted to 100% after 5s. After the opening of the three-way regulating valve 402 is adjusted, the cooling fan is shut down 15s, and the shutdown command ends.

[0039] In summary, the present invention has the following advantages: (1) The high-power charging cooling system can improve energy utilization and reduce losses. Specifically, the heat generated by the charging connection device can be temporarily stored by the heat storage device and then utilized. For example, the cooling circulation medium can be preheated, and it can be used for winter heating and domestic hot water in stations or other places, and its heat can be recovered and converted into a high-grade heat source.

[0040] (2) The high-power charging cooling system and its control method can reduce noise pollution and the impact on the ambient air temperature. Specifically, since the cooling fan does not run at high speed all the time, the noise pollution is relatively light. By setting up a heat storage device, the heat of the charging connection device is not completely lost to the air, which can reduce the temperature rise of the air around the charging equipment.

[0041] (3) This control method can effectively increase the lifespan of system components. Specifically, by intelligently controlling the cooling fan, the cooling fan can be prevented from running continuously at high speed for a long time, which is conducive to increasing the lifespan of the cooling fan. In addition, the liquid cooling pump can be prevented from running at high load for a long time in winter, which is conducive to increasing the lifespan of the liquid cooling pump.

[0042] (4) The control method of the present invention enables the high-power charging cooling system to adaptively adjust according to the actual operating conditions, so as to better adapt to various environmental conditions.

Claims

1. A control method for a high-power charging cooling system, the high-power charging cooling system comprising a charging connection device temperature sensor for detecting the temperature of a charging connection device (1); further comprising a primary cooling system (2) heat-exchange connected to the charging connection device (1), the primary cooling system (2) being heat-exchange connected to a high-power charging cooling secondary system (4); further comprising a high-power charging cooling system controller (3) signal-connected to the charging connection device (1) and communication-connected to a charging device controller, the high-power charging cooling system controller (3) controlling the primary cooling system (2) and the high-power charging cooling secondary system (4), the high-power charging cooling secondary system (4) comprising a heat storage device and a heat dissipation device, the heat storage device and... The heat dissipation device is connected to a hot water pump via a three-way regulating valve (402). The three-way regulating valve (402) is connected to the primary cooling system (2) via the hot water pump. The heat dissipation device includes a heat dissipation fan (401). The high-power charging cooling system controller (3) controls the connection of the three-way regulating valve (402). The primary cooling system (2) includes a liquid-cooled pump for conveying the circulating cooling medium to the charging connection device (1) and a pressure sensor for monitoring the pressure of the circulating cooling medium. The heat storage device includes a heat storage device temperature sensor. The high-power charging cooling secondary system (4) includes a working fluid outlet temperature sensor and a working fluid inlet temperature sensor. The high-power charging cooling secondary system (4) includes an ambient temperature sensor. The high-power charging cooling system controller (3) includes an MCU main control module, a communication module for communicating with the charging equipment controller, a liquid cooling pump DO module for controlling the output of the liquid cooling pump, a cooling fan DO module for controlling the output of the cooling fan (401), a hot water pump DO module for controlling the output of the hot water pump, a three-way regulating valve DO module for controlling the output of the three-way regulating valve (402), a liquid cooling pump DI module for detecting the operating status of the liquid cooling pump, a cooling fan DI module for detecting the operating status of the cooling fan (402), a hot water pump DI module for detecting the operating status of the hot water pump, a three-way regulating valve DI module for detecting the opening degree of the three-way regulating valve (402), and an AD module for inputting the signals of the pressure sensor and each temperature sensor. Its features are: The control method includes the following steps: Step S1: The charging device controller sends a start signal to the communication module, and the high-power charging cooling system controller (3) is powered on. Step S2: Perform fault detection, including checking whether the communication is normal, checking whether the pressure of the circulating cooling medium is normal, and checking whether the measured values ​​of each temperature sensor are normal. If any abnormality is found, a fault alarm will be output immediately. Step S3: Determine whether the ambient temperature exceeds the operating range. If an abnormality occurs, output an ambient temperature alarm immediately. If the ambient temperature does not exceed the operating range, repeat the fault detection at certain intervals and proceed to step S4. Step S4: Detect the temperature sensor values ​​T1 of the heat storage device, T2 of the ambient temperature sensor, and T5 of the charging connection device collected by the AD module to determine whether it is a low-temperature start-up. If it is not a low-temperature start-up, proceed to step S5; if it is a low-temperature start-up, proceed to step S6. Step S5: Detect the temperature sensor value T1 of the heat storage device to determine if the heat storage device has enough heat for preheating. If the heat is sufficient, control the three-way regulating valve (402) to open at an opening degree a%, and the hot water pump runs at 80% speed for a time t1 to preheat the circulating cooling medium. Then proceed to step S6. If the heat of the heat storage device is insufficient, proceed directly to step S6. Step S6: The heat storage and release working fluid and the circulating cooling medium are set to output at startup. Step S7: After the high-power charging cooling system is started, it enters the operation and adjustment stage. After entering the operation and adjustment phase, step S8 is also included. The AD module detects the temperature sensor value T1 of the heat storage device every time t2, and judges the difference between the temperature sensor value T1 and the target value Ta. If the difference between T1 and Ta is greater than U, it means that the heat storage device has not yet reached heat saturation. The MCU main control module controls the opening of the three-way regulating valve (402) to 100% so that all the heat storage and release working fluid enters the heat storage device for heat release. When the difference between T1 and Ta is between U and V, it means that the heat storage device has not yet reached heat saturation. The MCU main control module controls the three-way regulating valve (402). The opening degree b% allows a portion of the heat storage medium to enter the heat storage device to release heat, while the other portion enters the heat dissipation device to dissipate heat. When the difference between T1 and Ta is between W and V, it means that the heat storage device is close to reaching heat saturation, and the MCU main control module controls the opening degree c% of the three-way regulating valve (402). When the difference between T1 and Ta is less than W, it means that the heat storage device has reached heat saturation, and at this time, the MCU main control module controls the opening degree 0% of the three-way regulating valve (402) to allow all the heat storage medium to enter the heat dissipation device to dissipate heat.

2. The control method for the high-power charging cooling system according to claim 1, characterized in that: The primary cooling system (2) includes a partition wall heat exchanger, and the liquid cooling pump is connected to the inner cavity of the partition wall heat exchanger.

3. The control method for the high-power charging cooling system according to claim 1, characterized in that: After entering the operation adjustment phase, step S9 is also included. The AD module detects the temperature sensor value T5 of the charging connection device every time t3 and determines whether T5 is greater than 50 degrees Celsius. If not, the MCU main control module controls the liquid cooling pump to output 0%. If so, it further determines whether T5-T5' is less than A. If so, it means that T5 is decreasing. The MCU main control module controls the liquid cooling pump to decelerate by n% until the minimum operating speed. If T5-T5' is between A and B, the MCU main control module controls the liquid cooling pump to run at the current speed. If T5-T5' is between B and C, the MCU main control module controls the liquid cooling pump to accelerate by n%. If T5-T5' is between C and D, the MCU main control module controls the liquid cooling pump to accelerate by 2n%. If T5-T5' is greater than D, the MCU main control module controls the liquid cooling pump to run at 100% speed. T5' is the previous detection value of the charging connection device temperature sensor.

4. The control method for the high-power charging cooling system according to claim 1, characterized in that: After entering the operation adjustment phase, step S10 is also included. The AD module detects the inlet temperature T3 and outlet temperature T4 of the heat storage and release working fluid at time intervals t4, and determines whether T4 is greater than 40 degrees Celsius. If not, the MCU main control module controls the hot water pump to run at the minimum speed. If so, it further determines whether T4-T3 is less than X. If so, it means that the current temperature rise of the heat storage and release working fluid is small, the flow rate of the heat storage and release working fluid is too large, or the heat dissipation is small. The MCU main control module controls the hot water pump to decelerate by n% until the minimum operating speed. If T4-T3 is between X and Y, the MCU main control module controls the hot water pump to run at the current speed. If T4-T3 is between Y and Z, the MCU main control module controls the hot water pump to accelerate by n%. If T4-T3 is greater than Z, the MCU main control module controls the hot water pump to run at 100% speed.

5. The control method for the high-power charging cooling system according to claim 1, characterized in that: After entering the operation and adjustment stage, step S11 is also included. The AD module detects the opening degree of the three-way regulating valve (402) every time t5. If the opening degree of the three-way regulating valve (402) is equal to 100%, it means that all the heat storage and release working fluid enters the heat storage device to release heat. Then the MCU main control module controls the cooling fan to output at 0%. If the opening degree of the three-way regulating valve (402) is not equal to 100%, then step S12 is entered: the AD module detects the inlet temperature value T3 of the heat storage and release working fluid and the ambient temperature sensor value T2 to determine whether T3 is greater than 35 degrees Celsius. If not, it means that the heat storage and release working fluid has a large heat absorption capacity. In order to avoid the low temperature of the circulating cooling medium causing viscosity increase, If the temperature rises, the MCU main control module controls the cooling fan to output at 0%; if T3 is greater than 35 degrees Celsius, it further determines whether T3-T2 is less than J. If so, it means that the current heat storage and release working fluid is close to the ambient temperature, the cooling fan speed is too high or the heat dissipation is too low, and the MCU main control module controls the cooling fan to decelerate by n% until the minimum operating speed. If T3-T2 is between J and K, the MCU main control module controls the cooling fan to run at the current speed. If T3-T2 is between K and L, the MCU main control module controls the cooling fan to accelerate by 2n%. If T4-T3 is greater than L, the MCU main control module controls the cooling fan to run at 100% speed.

6. The control method for the high-power charging cooling system according to claim 1, characterized in that: After entering the operation adjustment stage, step S13 is also included. When the high-power charging cooling system controller (3) receives the shutdown command from the charging equipment controller, the MCU main control module controls the liquid cooling pump to shut down after a 20s delay. After shutting down the liquid cooling pump, the hot water pump is shut down after a 20s delay. After shutting down the hot water pump, the opening of the three-way regulating valve (402) is adjusted to 100% after 5s. After the opening of the three-way regulating valve (402) is adjusted, the cooling fan is shut down 15s, and the shutdown command ends.

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