Cooling control method, system and equipment of liquid cooling machine and storage medium

Abstract

The invention discloses a heat dissipation control method for a liquid cooling machine, which generates a feedforward signal according to a given load of a charging pile, predicts a gun line temperature set value, adjusts the flow velocity of liquid cooling oil in advance, and solves the hysteresis problem of an existing heat dissipation system. According to the method, a cascade control system with a feedforward feedback function is adopted, an outer-layer slow loop and an inner-layer fast loop work cooperatively, the load change of the charging pile can be quickly responded, and the gun line temperature is maintained within a safe range. Compared with a traditional heat dissipation mode, the heat dissipation efficiency is improved, the response speed is increased, the stability and safety of equipment operation are enhanced, meanwhile, noise pollution is reduced, and the overall performance and economical efficiency of the system are improved.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and in particular to a liquid cooler heat dissipation control method, system, device and storage medium. Background Art

[0002] With the widespread application of new energy vehicles, charging piles, as their core supporting facilities, have become the focus of industry attention in terms of performance and operational stability. As a key component of charging piles, the heat dissipation system directly affects the safety and operational efficiency of the equipment. At present, most charging pile heat dissipation systems on the market use high-speed fans, such as axial flow fans or centrifugal fans, for heat dissipation. However, this heat dissipation method will generate a lot of noise during operation. For example, when a manufacturer's integrated charger is operating normally, the noise value measured outside the pile can reach 80 decibels, which seriously affects the living environment of surrounding residents and forms noise pollution. Therefore, liquid cooling heat dissipation has emerged as a more efficient and low-noise alternative. However, the existing liquid cooling heat dissipation technology still has certain limitations, especially in terms of heat dissipation control strategy, which needs to be further optimized to meet the needs of efficient and safe operation of charging piles.

[0003] At present, the liquid cooling system of the charging pile mostly uses sensors to detect the return oil temperature to adjust the liquid cooling oil flow rate. Although this feedback control method can achieve basic heat dissipation functions, it has obvious hysteresis. When the sensor detects that the return oil temperature has risen, the charging pile has been running for several minutes and heat has begun to accumulate, resulting in poor heat dissipation. In addition, this hysteresis may also affect the operating efficiency and safety of the charging pile, especially when running at high load, the rapid rise in gun line temperature may cause the cooling system to fail to respond in time, thereby affecting the stability and service life of the equipment.

[0004] Therefore, a new heat dissipation control strategy is urgently needed to solve the hysteresis and noise problems of existing technologies, so as to ensure that the charging pile operates under efficient and safe conditions while reducing the impact on the surrounding environment. This new heat dissipation control strategy should have more precise temperature control capabilities, be able to predict and respond to the heat dissipation needs of the charging pile in advance, thereby avoiding insufficient or excessive heat dissipation caused by hysteresis, and play an important role in reducing noise. Summary of the invention

[0005] The purpose of the present invention is to provide a liquid cooler heat dissipation control method, system, device and storage medium to overcome the shortcomings of the prior art in that there is a lag in the heat dissipation of charging piles.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A liquid cooling machine heat dissipation control method, comprising: Generate a feedforward signal based on the given load of the charging pile to predict the gun line temperature setpoint; Input the gun line temperature setting value to the outer slow speed circuit, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; Input the liquid cooling oil flow rate set value to the inner fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

[0007] Among them, a feedforward signal is generated according to a given load of the charging pile to predict the gun line temperature setting value, including: The charging pile obtains the current charging current as a given load and generates a feedforward signal to the function generator; The function generator predicts the gun line temperature setpoint.

[0008] Among them, the functional relationship of the function generator is:

[0009] Where x is the charging current and f(x) is the gun line temperature setting value.

[0010] Among them, the gun line temperature setting value is input to the outer slow speed circuit, the gun line temperature deviation is calculated and the liquid cooling oil flow rate setting value is output, including: Input the gun line temperature set value and the gun line temperature actual value to the main regulator in the outer slow speed loop; The main regulator calculates the gun line temperature deviation and outputs the liquid cooling oil flow rate setting value. The main regulator output calculation formula is as follows:

[0011] Where, e2(k) is the gun line temperature deviation value, u2(k) is the gun line temperature output prediction value, K P2 is the proportionality constant, K i2 is the integration constant, K d2 is the differential constant.

[0012] Among them, the calculation formula of the gun line temperature deviation value is as follows:

[0013] Where r2 is the gun line temperature setting value, 2 is the actual detection value of the gun line temperature.

[0014] Among them, inputting the liquid cooling oil flow rate setting value to the inner layer fast loop, calculating the liquid cooling oil flow rate deviation and outputting the flow rate adjustment signal, including: Input the liquid cooling oil flow rate set value and the liquid cooling oil flow rate actual value to the sub-regulator in the inner layer fast loop; The auxiliary regulator calculates the liquid cooling oil flow rate deviation and outputs a flow rate adjustment signal. The auxiliary regulator output calculation formula is as follows:

[0015] Where, e1(k) is the liquid cooling oil flow rate deviation value, u1(k) is the liquid cooling oil flow rate output prediction value, K P1 is the proportionality constant, K i1 is the integration constant, K d1 is the differential constant.

[0016] Among them, the calculation formula of the liquid cooling oil flow rate deviation value is as follows:

[0017] Where r1 is the set value of the liquid cooling oil flow rate, 1 is the actual value of the liquid cooling oil flow rate.

[0018] A liquid cooling machine heat dissipation system, comprising: A feedforward module is used to generate a feedforward signal according to the given load of the charging pile and predict the set value of the gun line temperature; The outer layer calculation module is used to input the gun line temperature setting value to the outer layer slow speed loop, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; The inner layer calculation module is used to input the liquid cooling oil flow rate setting value to the inner layer fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

[0019] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the liquid cooling machine heat dissipation control method as described above are implemented.

[0020] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the liquid cooler heat dissipation control method as described above are implemented.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects: A method for controlling heat dissipation of a liquid cooler generates a feedforward signal according to a given load of a charging pile and predicts the set value of the gun line temperature. It can adjust the flow rate of the liquid cooling oil in advance and effectively solve the hysteresis problem of the existing heat dissipation system. This feedforward control method enables the system to respond at the early stage of the load change of the charging pile, avoiding insufficient or excessive heat dissipation due to hysteresis, thereby improving the heat dissipation efficiency and response speed. At the same time, a cascade control system with a feedforward feedback function is adopted, and the outer slow loop and the inner fast loop work together, further enhancing the system's ability to adapt to drastic changes in the gun line temperature, ensuring that the liquid cooling system can respond to the load changes of the charging pile in a timely manner and maintain the gun line temperature within a safe range.

[0022] In terms of equipment operation stability and safety, this method maintains the gun line temperature within the set safety range by precisely controlling the liquid cooling oil flow rate, thus avoiding equipment damage or unstable operation due to excessive temperature. Especially during high-load operation, it can effectively prevent the rapid rise in gun line temperature from affecting equipment stability and extend the service life of the charging pile. In addition, the optimized heat dissipation control strategy combines feedforward control with feedback control, so that the heat dissipation system can maintain good heat dissipation effect under different working conditions, further improving the stability and safety of equipment operation.

[0023] In terms of noise control, liquid cooling has the advantage of low noise compared to traditional high-speed fan cooling. The liquid cooling machine heat dissipation control method of the present invention further improves the efficiency of the liquid cooling system by optimizing the heat dissipation control strategy, reduces the dependence on high-speed fans, and thus effectively reduces the noise generated during the operation of the charging pile, improves the living environment of surrounding residents, and reduces noise pollution.

[0024] In addition, this method optimizes the heat dissipation control strategy, so that the liquid cooling system can operate more efficiently, thereby improving the performance of the entire charging pile system. The system can reduce energy waste and improve operating efficiency while ensuring the heat dissipation effect. At the same time, since the heat dissipation system can operate more stably, it reduces equipment damage caused by insufficient or excessive heat dissipation, thereby reducing the maintenance cost and maintenance frequency of the equipment. The optimized heat dissipation control strategy also extends the service life of the system, further improving the economy of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of a liquid cooling machine heat dissipation control method in an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of a heat dissipation control system for a liquid cooler in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] With the widespread application of new energy vehicles, charging piles, as their core supporting facilities, have become the focus of industry attention in terms of performance and operational stability. As a key component of charging piles, the heat dissipation system directly affects the safety and operational efficiency of the equipment. At present, most charging pile heat dissipation systems on the market use high-speed fans, such as axial flow fans or centrifugal fans, for heat dissipation. However, this heat dissipation method will generate a lot of noise during operation. For example, when a manufacturer's integrated charger is operating normally, the noise value measured outside the pile can reach 80 decibels, which seriously affects the living environment of surrounding residents and forms noise pollution. Therefore, liquid cooling heat dissipation has emerged as a more efficient and low-noise alternative. However, the existing liquid cooling heat dissipation technology still has certain limitations, especially in terms of heat dissipation control strategy, which needs to be further optimized to meet the needs of efficient and safe operation of charging piles.

[0028] At present, the liquid cooling system of the charging pile mostly uses sensors to detect the return oil temperature to adjust the liquid cooling oil flow rate. Although this feedback control method can achieve basic heat dissipation functions, it has obvious hysteresis. When the sensor detects that the return oil temperature has risen, the charging pile has been running for several minutes and heat has begun to accumulate, resulting in poor heat dissipation. In addition, this hysteresis may also affect the operating efficiency and safety of the charging pile, especially when running at high load, the rapid rise in gun line temperature may cause the cooling system to fail to respond in time, thereby affecting the stability and service life of the equipment.

[0029] Therefore, a new heat dissipation control strategy is urgently needed to solve the hysteresis and noise problems of existing technologies, so as to ensure that the charging pile operates under efficient and safe conditions while reducing the impact on the surrounding environment. This new heat dissipation control strategy should have more precise temperature control capabilities, be able to predict and respond to the heat dissipation needs of the charging pile in advance, thereby avoiding insufficient or excessive heat dissipation caused by hysteresis, and play an important role in reducing noise.

[0030] This application proposes a liquid cooler heat dissipation control method, system, device and storage medium, which adopts a cascade control system with feedforward feedback function, and can adjust the liquid cooling oil flow rate in advance according to the load of the charging pile, thereby effectively solving the hysteresis problem of the existing heat dissipation system, while reducing noise pollution, and ensuring that the gun line temperature of the charging pile is maintained within a safe range during operation. This strategy can not only improve the operating efficiency of the charging pile, but also provide more friendly noise control for the surrounding environment, meeting the needs of modern charging piles for efficient and low-noise operation.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] A specific embodiment of the present invention provides a liquid cooling machine heat dissipation control method, such as Figure 1 As shown, the specific implementation steps of this method are as follows: Generate a feedforward signal based on the given load of the charging pile to predict the gun line temperature setpoint; Input the gun line temperature setting value to the outer slow speed circuit, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; Input the liquid cooling oil flow rate set value to the inner fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

[0033] Among them, a feedforward signal is generated according to a given load of the charging pile to predict the gun line temperature setting value, including: The charging pile obtains the current charging current as a given load and generates a feedforward signal to the function generator; The function generator predicts the gun line temperature setpoint.

[0034] It should be noted that the input measurement value of the outer slow loop in the specific implementation of the present invention is the gun line temperature setting value generated by the given load of the feedforward signal charging pile after passing through the function generator. The given load of the charging pile is the size of the vehicle charging current. Most new energy vehicles have a low SOC value in the early stage of charging, and the charging demand current is large. The power output of the module in the charging pile is large, and the heat is serious. At this time, a feedforward signal can be sent to reduce the given value of the gun line temperature and increase the flow rate of the liquid cooling oil.

[0035] The function generator is a negative value function, and the actual function can be obtained by sampling multiple sets of current and gun line temperature data sets. That is, the larger the vehicle charging current, the smaller the gun line temperature setting value, and the more the liquid cooling oil flow rate value needs to be increased. In this specific implementation, the function generator of a liquid-cooled charging terminal obtained by simulation is f(x)=75-0.1x, where the value range of x is [0, 600], and the value range of f(x) is [15, 75].

[0036] If the gun line temperature setting value is 45℃, when the current charging current of the charging pile is 300A, the actual detected gun line temperature is 45℃, and the liquid cooling oil flow rate is not adjusted at this time; if the gun line temperature value at the current moment minus the gun line set temperature value is a positive deviation, the control valve is adjusted through the PID controller to increase the liquid cooling oil flow rate for cooling treatment; if the actual gun line temperature value at the current moment minus the gun line set temperature value is a negative deviation, the control valve is adjusted through the PID controller to reduce the liquid cooling oil flow rate. The temperature difference is adjusted in 5℃ as an order of magnitude, the minimum flow rate of the liquid cooling oil is 0, the temperature difference is reduced or increased by one order of magnitude at 0-5℃, the temperature difference is reduced or increased by two orders of magnitude at 5-10℃, the temperature difference is reduced or increased by three orders of magnitude at 10-15℃, and so on, with a maximum of 7 orders of magnitude.

[0037] Among them, the gun line temperature setting value is input to the outer slow speed circuit, the gun line temperature deviation is calculated and the liquid cooling oil flow rate setting value is output, including: Input the gun line temperature set value and the gun line temperature actual value to the main regulator in the outer slow loop, i.e., the PID2 controller; The main regulator calculates the gun line temperature deviation and outputs the liquid cooling oil flow rate setting value. The main regulator output calculation formula is as follows:

[0038] Where e2(k) is the current gun line temperature difference of the PID2 controller, u2(k) is the predicted value of the gun line temperature output after the PID2 regulator acts on G1(S) (gun line temperature-liquid cooling oil flow rate transfer function), and K P2 , K i2 and K d2 are the three parameters of PID2 regulator: proportional constant, integral constant and differential constant; e2(k) is the deviation between the temperature setting value of the given load of the charging pile after the function generator and the actual detection gun line temperature value, △e2(k) is the change rate of the deviation between the gun line temperature setting value of the given load of the charging pile after the function generator and the actual detection gun line temperature value, △e2 2 (k) is the change value of the deviation change rate between the gun line temperature setting value generated by the function generator after the given load of the charging pile at the current moment and the actual detected gun line temperature value:

[0039]

[0040]

[0041] In the formula, k, k-1 and k-2 represent the current moment, the past moment and the past two moments respectively. r2 is the gun line temperature setting value generated by the function generator after the given load of the charging pile. 2 is the actual detection value of the gun line temperature.

[0042] It should be noted that the G1(S) (temperature-liquid cooling oil flow rate transfer function) model can be obtained by taking the gun line temperature and the liquid cooling oil flow rate as variables and testing them in different environments to obtain the test data.

[0043] The outer slow circuit maintains the gun line temperature within the allowable safety range when the charging pile is running by fine-tuning the electronic controller. P2 , K i2 and K d2 It can be obtained by trial and error. That is, first change the integral value until it is determined that the liquid cooling oil flow rate deviation is in a decreasing state, and then the initial integral value can be obtained; then change the proportional value to determine that the liquid cooling oil flow rate deviation continues to be in a decreasing state, and then an initial proportional value can be obtained; finally, change the differential value to determine that the liquid cooling oil flow rate deviation continues to be in a decreasing state, and then the initial differential value can be output. Thus, the three parameter values ​​are determined.

[0044] Among them, inputting the liquid cooling oil flow rate setting value to the inner layer fast loop, calculating the liquid cooling oil flow rate deviation and outputting the flow rate adjustment signal, including: Input the liquid cooling oil flow rate set value and the liquid cooling oil flow rate actual value to the sub-regulator in the inner layer fast loop; The auxiliary regulator calculates the liquid cooling oil flow rate deviation and outputs a flow rate adjustment signal. The auxiliary regulator output calculation formula is as follows:

[0045] Where e1(k) is the current liquid cooling oil flow rate difference of the PID1 controller, u1(k) is the current liquid cooling oil flow rate output prediction value of the PID1 regulator after acting on the electronic controller, and K P1 , K i1 and K d1 are the three parameters of PID1 regulator: proportional constant, integral constant and differential constant; e1(k) is the deviation between the input set value of the fan speed at the current moment and the actual detected liquid cooling oil flow rate value, △e1(k) is the change rate of the deviation between the input set value of the liquid cooling oil flow rate at the current moment and the actual detected liquid cooling oil flow rate value, △e1 2 (k) is the change value of the change rate of the deviation between the input setting value of the liquid cooling oil flow rate at the current moment and the actual detected liquid cooling oil flow rate value:

[0046]

[0047]

[0048] In the formula, k, k-1 and k-2 represent the current moment, the past moment and the past two moments respectively. r1 is the input setting value of the liquid cooling oil flow rate, 1 is the actual detected value of the liquid cooling oil flow rate.

[0049] The inner fast loop first sends the liquid cooling oil flow rate difference to the PID1 regulator, and then the PID1 regulator adjusts the frequency or voltage of the electronic controller to quickly adjust the liquid cooling oil flow rate to adapt to the drastic changes in the gun line temperature.

[0050] PID1 regulator related parameters K P1 , K i1 and K d1 It can be obtained by trial and error. That is, first change the integral value until it is determined that the liquid cooling oil flow rate deviation is in a decreasing state, and then the initial integral value can be obtained; then change the proportional value to determine that the liquid cooling oil flow rate deviation continues to be in a decreasing state, and then an initial proportional value can be obtained; finally, change the differential value to determine that the liquid cooling oil flow rate deviation continues to be in a decreasing state, and then the initial differential value can be output. Thus, the three parameter values ​​are determined.

[0051] On the other hand, a specific embodiment of the present invention further provides a liquid cooling machine heat dissipation system, the system comprising: A feedforward module is used to generate a feedforward signal according to the given load of the charging pile and predict the set value of the gun line temperature; The outer calculation module is used to input the gun line temperature setting value to the outer slow speed loop, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; The inner layer calculation module is used to input the liquid cooling oil flow rate setting value to the inner layer fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

[0052] Specifically, Figure 2 As shown, the system obtains the current charging current as a given load in real time through the charging pile during operation. The feedforward module generates a feedforward signal through a function generator according to the charging current. The feedforward module outputs the predicted gun line temperature setting value to the outer calculation module. The outer calculation module receives the gun line temperature setting value output by the feedforward module, and obtains the actual value of the gun line temperature from the sensor module. The main regulator outputs the calculated liquid cooling oil flow rate setting value to the inner calculation module. The inner calculation module receives the liquid cooling oil flow rate setting value output by the outer calculation module, and obtains the actual value of the liquid cooling oil flow rate from the sensor module.

[0053] In addition, the auxiliary regulator outputs the calculated flow rate adjustment signal to the liquid cooling oil flow rate adjustment device. The liquid cooling oil flow rate adjustment device receives the flow rate adjustment signal output by the inner layer calculation module. According to the flow rate adjustment signal, the liquid cooling oil flow rate adjustment device adjusts the liquid cooling oil flow rate by controlling the frequency or voltage of the electronic controller to adapt to the change of the gun line temperature. The liquid cooling oil flow rate adjustment device feeds back the actual value of the adjusted liquid cooling oil flow rate to the sensor module, and the sensor module transmits the data to the inner layer calculation module for the next deviation calculation.

[0054] The sensor module monitors the actual values ​​of the gun line temperature and the liquid cooling oil flow rate in real time, and feeds these data back to the outer and inner computing modules. The outer and inner computing modules dynamically adjust the gun line temperature setting value and the liquid cooling oil flow rate setting value based on the real-time feedback data to ensure that the liquid cooling system can quickly respond to the load changes of the charging pile. The proportional constant, integral constant and differential constant of the PID regulator are optimized and adjusted through the trial and error method to ensure the control accuracy and response speed of the liquid cooling system.

[0055] A computer device is also provided in a specific embodiment of the present invention. Specifically, the computer device includes a processor and a memory, the memory is used to store a computer program, the computer program includes program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions to implement corresponding method processes or corresponding functions; the processor described in the embodiment of the present invention can be used for the operation of the liquid cooler heat dissipation control method, including the following steps: generating a feedforward signal according to a given load of the charging pile, predicting a gun line temperature setting value; inputting the gun line temperature setting value to the outer slow circuit, calculating the gun line temperature deviation and outputting the liquid cooling oil flow rate setting value; inputting the liquid cooling oil flow rate setting value to the inner fast circuit, calculating the liquid cooling oil flow rate deviation and outputting a flow rate adjustment signal.

[0056] A storage medium is also provided in a specific embodiment of the present invention, specifically, a computer-readable storage medium, which is a memory device in a terminal device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and the extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory, or a non-volatile memory, such as at least one disk memory. One or more instructions stored in a computer-readable storage medium can be loaded and executed by the processor to implement the corresponding steps of the liquid cooler heat dissipation control method in the above embodiment; one or more instructions in the computer-readable storage medium are loaded by the processor and execute the following steps: generate a feedforward signal according to the given load of the charging pile, and predict the gun line temperature setting value; input the gun line temperature setting value to the outer slow loop, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; input the liquid cooling oil flow rate setting value to the inner fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

[0057] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0058] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0059] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0060] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A liquid cooling machine heat dissipation control method, characterized in that: include: Generate a feedforward signal based on the given load of the charging pile to predict the gun line temperature setpoint; Input the gun line temperature setting value to the outer slow speed circuit, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; Input the liquid cooling oil flow rate set value to the inner fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

2. A liquid cooling machine heat dissipation control method according to claim 1, characterized in that: The method of generating a feedforward signal according to a given load of the charging pile and predicting a setting value of the gun line temperature includes: The charging pile obtains the current charging current as a given load and generates a feedforward signal to the function generator; The function generator predicts the gun line temperature setpoint.

3. A liquid cooling machine heat dissipation control method according to claim 2, characterized in that: The functional relationship of the function generator is: Where x is the charging current and f(x) is the gun line temperature setting value.

4. The method for controlling heat dissipation of a liquid cooler according to claim 1, characterized in that: The inputting of the gun line temperature setting value to the outer layer slow speed circuit, calculating the gun line temperature deviation and outputting the liquid cooling oil flow rate setting value comprises: Input the gun line temperature set value and the gun line temperature actual value to the main regulator in the outer slow speed loop; The main regulator calculates the gun line temperature deviation and outputs the liquid cooling oil flow rate setting value. The main regulator output calculation formula is as follows: Where, e2(k) is the gun line temperature deviation value, u2(k) is the gun line temperature output prediction value, K P2 is the proportionality constant, K i2 is the integration constant, K d2 is the differential constant.

5. A liquid cooling machine heat dissipation control method according to claim 4, characterized in that: The calculation formula of the gun line temperature deviation value is as follows: Where r2 is the gun line temperature setting value, 2 is the actual detection value of the gun line temperature.

6. The method for controlling heat dissipation of a liquid cooler according to claim 1, characterized in that: The inputting of the liquid cooling oil flow rate setting value to the inner layer fast loop, calculating the liquid cooling oil flow rate deviation and outputting the flow rate adjustment signal comprises: Input the liquid cooling oil flow rate set value and the liquid cooling oil flow rate actual value to the sub-regulator in the inner layer fast loop; The auxiliary regulator calculates the liquid cooling oil flow rate deviation and outputs a flow rate adjustment signal. The auxiliary regulator output calculation formula is as follows: Where, e1(k) is the liquid cooling oil flow rate deviation value, u1(k) is the liquid cooling oil flow rate output prediction value, K P1 is the proportionality constant, K i1 is the integration constant, K d1 is the differential constant.

7. A liquid cooling machine heat dissipation control method according to claim 6, characterized in that: The liquid cooling oil flow rate deviation value calculation formula is as follows: Where r1 is the set value of the liquid cooling oil flow rate, 1 is the actual value of the liquid cooling oil flow rate.

8. A liquid cooling machine heat dissipation system, characterized in that: include: A feedforward module is used to generate a feedforward signal according to the given load of the charging pile and predict the set value of the gun line temperature; The outer calculation module is used to input the gun line temperature setting value to the outer slow speed loop, calculate the gun line temperature deviation and output the liquid cooling oil flow rate setting value; The inner layer calculation module is used to input the liquid cooling oil flow rate setting value to the inner layer fast loop, calculate the liquid cooling oil flow rate deviation and output the flow rate adjustment signal.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the liquid cooler heat dissipation control method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the liquid cooler heat dissipation control method according to any one of claims 1 to 7 are implemented.

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