Integrated thermal management control method and device

Abstract

The invention discloses an integrated heat management control method and device, and the method comprises the steps: obtaining the current environment temperature, the current liquid inlet temperature and the current liquid outlet temperature of a liquid cooling unit and the current high pressure of a compressor in response to a refrigeration operation request; according to the current environment temperature and a preset temperature threshold value, a refrigeration mode of the liquid cooling unit is selected; and in different refrigeration modes, according to the current environment temperature, the current liquid inlet temperature, the current liquid outlet temperature and the current high pressure of the compressor, the target rotating speed of the compressor and the duty ratio of a fan are adjusted based on different preset control strategies, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature. According to the technical scheme provided by the embodiment of the invention, the energy consumption of a whole machine system is reduced, and the COP energy efficiency ratio of the system is improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technologies, and in particular, to an integrated thermal management control method and device. Background Art

[0002] With the accelerating deployment of new energy energy storage power stations towards GW-level ultra-large scale, the fourth-generation lithium battery packs with an energy density exceeding 350 Wh / kg are facing an exponentially increasing threat of thermal runaway. Industry data shows that in 2024, the number of lithium battery safety accidents caused by thermal management failures globally increased by 63% year-on-year, highlighting the disconnection contradiction between the existing technology system and the high energy density requirements. The thermal response delay of the current mainstream liquid cooling solutions is generally large. In the 4C ultra-fast charging scenario, 47% of the thermal runaway warnings miss the best intervention window due to the delay, resulting in a rapid breakthrough in the thermal spread speed at the cell level, directly threatening the overall safety of the battery pack. When the existing liquid cooling system deals with a 350 Wh / kg battery pack, to match the corresponding cooling capacity, the energy consumption ratio of the liquid cooling pump group soars, and the coefficient of performance (COP) of the system drops below the 1.8 critical point. Summary of the Invention

[0003] The present invention provides an integrated thermal management control method and device to solve the problems of high energy consumption and low energy efficiency ratio in the existing technology.

[0004] According to one aspect of the present invention, there is provided an integrated thermal management control method, including:

[0005] In response to a refrigeration operation request, obtain the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature of the liquid cooling unit, and the current high-pressure pressure of the compressor;

[0006] According to the current ambient temperature and a preset temperature threshold, select a refrigeration mode of the liquid cooling unit;

[0007] In the "only compressor refrigeration" mode, according to the current ambient temperature, the current outlet liquid temperature, the current inlet liquid temperature, and the current high-pressure pressure of the compressor, adjust the target speed of the compressor and the duty cycle of the fan based on a first preset control strategy, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature;

[0008] In the "only water tank refrigeration" mode, according to the current ambient temperature and the current outlet liquid temperature, adjust the duty cycle of the fan based on a second preset control strategy, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature;

[0009] In the "combined refrigeration" mode, according to the current ambient temperature and the current liquid outlet temperature, the target speed of the compressor and the duty cycle of the fan are adjusted based on the third preset control strategy, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature.

[0010] Optionally, the preset temperature threshold includes a first preset temperature threshold and a second preset temperature threshold;

[0011] Selecting the refrigeration mode of the liquid cooling unit according to the current ambient temperature and the preset temperature threshold includes:

[0012] When the current ambient temperature is greater than or equal to the first preset temperature threshold, control the liquid cooling unit to enter the "only compressor refrigeration" mode;

[0013] When the current ambient temperature is less than or equal to the second preset temperature threshold, control the liquid cooling unit to enter the "only water tank refrigeration" mode;

[0014] When the current ambient temperature is less than the first preset temperature threshold and greater than the second preset temperature threshold, control the liquid cooling unit to enter the "combined refrigeration" mode.

[0015] Optionally, in the "only compressor refrigeration" mode, according to the current ambient temperature, the current liquid outlet temperature, the current liquid inlet temperature, and the current high-pressure pressure of the compressor, adjusting the target speed of the compressor and the duty cycle of the fan based on the first preset control strategy, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature includes:

[0016] In the "only compressor refrigeration" mode, according to the current liquid outlet temperature, use the PID algorithm to adjust the target speed of the compressor, and when the current liquid outlet temperature reaches the preset shutdown temperature, control the compressor to stop;

[0017] Turn on the fan, and adjust the duty cycle of the fan by looking up a table according to the high-pressure pressure of the compressor, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature.

[0018] Optionally, the preset temperature threshold further includes a third preset temperature threshold;

[0019] After turning on the fan and adjusting the duty cycle of the fan by looking up a table according to the high-pressure pressure of the compressor, it further includes:

[0020] When the current ambient temperature decreases, judge whether the current ambient temperature is less than or equal to the third preset temperature threshold;

[0021] If so, control the liquid cooling unit to enter the "combined refrigeration" mode; if not, control the liquid cooling unit to continue operating in the "only compressor refrigeration" mode.

[0022] Optionally, in the "only water tank refrigeration" mode, according to the current ambient temperature and the current liquid outlet temperature, adjusting the fan duty ratio based on a second preset control strategy to stabilize the current liquid outlet temperature of the liquid cooling unit at a preset target liquid outlet temperature includes:

[0023] In the "only water tank refrigeration" mode, turn off the compressor and open the water valve;

[0024] Turn on the fan and adjust the fan duty ratio using the PID algorithm according to the current liquid outlet temperature;

[0025] Judge whether the current ambient temperature is greater than a second preset temperature threshold;

[0026] If so, control the liquid cooling unit to enter the "combined refrigeration" mode; if not, control the liquid cooling unit to continue operating in the "only water tank refrigeration" mode.

[0027] Optionally, the preset temperature threshold further includes a fourth preset temperature threshold;

[0028] In the "combined refrigeration" mode, according to the current ambient temperature and the current liquid outlet temperature, adjusting the compressor target speed and the fan duty ratio based on a third preset control strategy to stabilize the current liquid outlet temperature of the liquid cooling unit at a preset target liquid outlet temperature includes:

[0029] In the "combined refrigeration" mode, adjust the compressor target speed using the PID algorithm according to the current liquid outlet temperature, and control the compressor to stop when the current liquid outlet temperature reaches the preset shutdown temperature;

[0030] Turn on the fan and adjust the fan duty ratio by looking up a table according to the current ambient temperature;

[0031] Open the water valve, and when the current ambient temperature decreases, judge whether the current ambient temperature is less than or equal to the fourth preset temperature threshold;

[0032] If so, control the liquid cooling unit to enter the "only water tank refrigeration" mode; if not, control the liquid cooling unit to continue operating in the "combined refrigeration" mode.

[0033] Optionally, after opening the water valve, it further includes:

[0034] When the current ambient temperature does not decrease, judge whether the current ambient temperature is greater than a first preset temperature threshold;

[0035] If so, control the liquid cooling unit to enter the "only compressor refrigeration" mode; if not, control the liquid cooling unit to continue operating in the "combined refrigeration" mode.

[0036] Optionally, the fourth preset temperature threshold < the second preset temperature threshold < the third preset temperature threshold < the first preset temperature threshold.

[0037] Optionally, before obtaining the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature, and the current high pressure of the compressor of the liquid cooling unit in response to the refrigeration operation request, it further includes:

[0038] Execute the initialization process.

[0039] According to another aspect of the present invention, there is provided an integrated thermal management control device, including:

[0040] An acquisition module, the acquisition module is used to obtain the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature, and the current high pressure of the compressor of the liquid cooling unit in response to the refrigeration operation request;

[0041] A selection module, the selection module is used to select the refrigeration mode of the liquid cooling unit according to the current ambient temperature and the preset temperature threshold;

[0042] A control module, the control module is used to adjust the target speed of the compressor and the fan duty ratio based on the first preset control strategy according to the current ambient temperature, the current outlet liquid temperature, the current inlet liquid temperature, and the current high pressure of the compressor in the "only compressor refrigeration" mode, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at the preset target outlet liquid temperature;

[0043] The control module is further used to adjust the fan duty ratio based on the second preset control strategy according to the current ambient temperature and the current outlet liquid temperature in the "only water tank refrigeration" mode, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at the preset target outlet liquid temperature;

[0044] The control module is further used to adjust the target speed of the compressor and the fan duty ratio based on the third preset control strategy according to the current ambient temperature and the current outlet liquid temperature in the "combined refrigeration" mode, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at the preset target outlet liquid temperature.

[0045] An embodiment of the present invention provides an integrated thermal management control method and device. The method includes: in response to a refrigeration operation request, obtaining the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature, and the current high-pressure pressure of the compressor of the liquid cooling unit; selecting a refrigeration mode of the liquid cooling unit according to the current ambient temperature and a preset temperature threshold; in the "compressor-only refrigeration" mode, adjusting the target speed of the compressor and the fan duty ratio based on a first preset control strategy according to the current ambient temperature, the current outlet liquid temperature, the current inlet liquid temperature, and the current high-pressure pressure of the compressor, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature; in the "water tank-only refrigeration" mode, adjusting the fan duty ratio based on a second preset control strategy according to the current ambient temperature and the current outlet liquid temperature, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature; in the "combined refrigeration" mode, adjusting the target speed of the compressor and the fan duty ratio based on a third preset control strategy according to the current ambient temperature and the current outlet liquid temperature, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature. The technical solution provided by the embodiment of the present invention frequency-converts and adjusts the compressor speed and the fan duty ratio according to the current outlet liquid temperature and the current ambient temperature, performs multi-path liquid supply and cooling on the battery, and stabilizes the current outlet liquid temperature of the liquid cooling unit at a preset target outlet liquid temperature. According to the working conditions of different current ambient temperatures of the liquid cooling unit, different refrigeration modes are selected, which can not only actively strengthen the heat exchange between the cooling medium in the whole machine system and the external cold air by the fan, actively reduce the working speed of the compressor, but also further use the temperature difference between the coolant in the whole machine system and the external environment, and use the PI algorithm to frequency-convert and adjust the fan speed to improve the heat exchange efficiency, and can achieve the effect of meeting the refrigeration demand only through natural cooling. The compressor cooling can be completely shut down, greatly reducing the energy consumption of the whole machine system and improving the COP energy efficiency ratio of the system.

[0046] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0048] Figure 1 It is a flowchart of an integrated thermal management control method provided by an embodiment of the present invention;

[0049] Figure 2Flow chart of another integrated thermal management control method provided by an embodiment of the present invention;

[0050] Figure 3 Initialization flow chart provided by an embodiment of the present invention;

[0051] Figure 4 Schematic structural diagram of an integrated thermal management control device provided by an embodiment of the present invention;

[0052] Figure 5 Schematic structural diagram of an electronic device of an integrated thermal management control method provided by an embodiment of the present invention. Detailed implementation manners

[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0055] Figure 1 Flow chart of an integrated thermal management control method provided by an embodiment of the present invention. This embodiment is applicable to thermal management of a battery pack in the energy storage field. This method can be executed by an integrated thermal management control device, which can be implemented in the form of hardware and / or software, and the integrated thermal management control device can be configured in any electronic device with communication functions. Refer to Figure 1 As shown in the figure, the method includes:

[0056] S110. In response to a refrigeration operation request, obtain the current ambient temperature, current inlet liquid temperature, current outlet liquid temperature, and current compressor high-pressure pressure of the liquid cooling unit.

[0057] Specifically, the liquid cooling unit controller reads the sampling data of the sensors in real time, filters the sampling data of the sensors according to the filtering algorithm, and converts the sampling data of the sensors into key system information such as temperature and pressure according to the calibration content. According to the agreed communication protocol and baud rate, the key system information such as temperature and pressure is transmitted to the upper computer through the CAN interface. When the upper computer issues a cooling requirement, the cooling mode of the liquid cooling unit is selected according to the current ambient temperature and the preset temperature threshold.

[0058] There are various sensors in the liquid cooling unit for monitoring the operating state of the liquid cooling system, such as temperature sensors, pressure sensors, etc. The liquid cooling unit controller continuously and timely obtains data from these sensors. For example, the temperature sensor outputs the detected ambient temperature in the form of a resistance signal, etc., and the controller reads these signals to obtain the corresponding values, providing basic data for subsequent processing. The data collected from the sensors may be affected by various interferences, such as electromagnetic interference, mechanical vibration interference, etc., resulting in noise or fluctuations in the data and unable to accurately reflect the true physical quantity. To improve the accuracy and reliability of the data, the controller uses a filtering algorithm to process the sampled data. Common filtering algorithms include mean filtering, median filtering, Kalman filtering, etc. The sampled values output by the sensors are usually some electrical signal values, such as voltage values, resistance values, etc., and these values themselves cannot directly represent physical quantities such as temperature and pressure. Therefore, conversion needs to be carried out according to the pre-stored calibration content. The calibration content refers to establishing the corresponding relationship between the sensor output signal and the measured physical quantity under specific conditions. For example, the temperature sensor may have been calibrated so that when the output resistance is 1Ω, it corresponds to 20°C, and when the output voltage is 2Ω, it corresponds to 40°C. The controller will convert the collected resistance value into the corresponding temperature value according to such a calibration relationship to obtain the key system operation information. The communication protocol refers to the rules and agreements followed when the liquid cooling unit controller and the upper computer conduct data communication. It stipulates the data format, transmission method, error checking, etc., to ensure that both parties can exchange data accurately and without error. The baud rate represents the data transmission rate, that is, the number of binary digits transmitted per second. The liquid cooling unit controller and the upper computer need to use the same baud rate for communication to ensure the synchronization of data transmission. The upper computer is usually a computer or other monitoring device used to centrally monitor and manage the operating state of the liquid cooling unit.

[0059] S120. Select the cooling mode of the liquid cooling unit according to the current ambient temperature and the preset temperature threshold.

[0060] Among them, the preset temperature threshold is one or more temperature standard values preset according to factors such as the usage requirements of the liquid cooling unit, the heat dissipation requirements of the equipment to be cooled, and energy conservation.

[0061] Specifically, the current ambient temperature is compared with different preset temperature thresholds to obtain different comparison results, and different comparison results correspond to different refrigeration modes of the liquid cooling unit. For example, when the current ambient temperature is greater than or equal to the first preset temperature threshold, the liquid cooling unit enters the "compressor-only refrigeration" mode; when the current ambient temperature is less than or equal to the second preset temperature threshold, the liquid cooling unit enters the "water tank-only refrigeration" mode; when the current ambient temperature is less than the first preset temperature threshold and greater than the second preset temperature threshold, the liquid cooling unit enters the "combined refrigeration" mode.

[0062] S130. In the "compressor-only refrigeration" mode, based on the current ambient temperature, current liquid outlet temperature, current liquid inlet temperature, and current compressor high-pressure, the target speed of the compressor and the fan duty ratio are adjusted based on the first preset control strategy to stabilize the current liquid outlet temperature of the liquid cooling unit at the preset target liquid outlet temperature.

[0063] Among them, the first preset control strategy can be based on some mathematical models, empirical formulas, or intelligent algorithms, comprehensively considering multiple factors such as the current ambient temperature, current liquid outlet temperature, current liquid inlet temperature, and current compressor high-pressure, to determine how to adjust the target speed of the compressor and the fan duty ratio to achieve the best operating state of the liquid cooling unit. The preset target liquid outlet temperature can be an ideal temperature value preset according to the requirements of the equipment to be cooled and the actual operating conditions.

[0064] Specifically, in the "compressor-only refrigeration" mode, first, based on the current liquid outlet temperature and current liquid inlet temperature, the target speed of the compressor is adjusted based on the PI algorithm. When the current liquid outlet temperature reaches the shutdown temperature of the compressor, the compressor is controlled to shut down. Secondly, the fan duty ratio is adjusted by querying the calibration table according to the current compressor high-pressure. Finally, according to the change of the current ambient temperature, it is determined whether the liquid cooling unit continues to maintain the current refrigeration mode or changes the refrigeration mode to stabilize the current liquid outlet temperature of the liquid cooling unit at the preset target liquid outlet temperature. In addition, the PI regulation provided in the embodiments of the present invention is an integral anti-windup PI regulation with a dead zone, that is, when the difference between the current liquid outlet temperature of the liquid cooling unit and the preset target liquid outlet temperature is within ±0.5°C, the compressor maintains the current speed without adjustment, reducing the frequency of compressor speed adjustment and reducing system oscillation; a saturation limit is imposed on the target speed of the compressor to avoid the continuous accumulation of the integral term and the occurrence of control failure.

[0065] S140. In the "water tank-only refrigeration" mode, based on the current ambient temperature and current liquid outlet temperature, the fan duty ratio is adjusted based on the second preset control strategy to stabilize the current liquid outlet temperature of the liquid cooling unit at the preset target liquid outlet temperature.

[0066] Among them, the second preset control strategy can be based on some mathematical models, empirical formulas, or intelligent algorithms.

[0067] Specifically, in the "only water tank refrigeration" mode, first, according to the current liquid outlet temperature, the duty ratio of the fan is adjusted based on the PI algorithm, and then, according to the change of the current ambient temperature, it is determined whether the liquid cooling unit continues to maintain the current refrigeration mode or changes the refrigeration mode, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature.

[0068] S150. In the "combined refrigeration" mode, according to the current ambient temperature and the current liquid outlet temperature, the target speed of the compressor and the duty ratio of the fan are adjusted based on the third preset control strategy, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature.

[0069] Among them, the third preset control strategy can be based on some mathematical models, empirical formulas or intelligent algorithms.

[0070] Specifically, in the "combined refrigeration" mode, first, according to the current liquid outlet temperature and the current liquid inlet temperature, the target speed of the compressor is adjusted based on the PI algorithm. When the current liquid outlet temperature reaches the shutdown temperature of the compressor, the compressor is controlled to shut down. Secondly, according to the change of the current ambient temperature, the duty ratio of the fan is adjusted and it is determined whether the liquid cooling unit continues to maintain the current refrigeration mode or changes the refrigeration mode, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature.

[0071] An embodiment of the present invention provides an integrated thermal management control method and device. The method includes: in response to a refrigeration operation request, obtaining the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature of the liquid cooling unit, and the current high-pressure pressure of the compressor; selecting a refrigeration mode of the liquid cooling unit according to the current ambient temperature and a preset temperature threshold; in the "compressor-only refrigeration" mode, adjusting the target speed of the compressor and the fan duty ratio based on a first preset control strategy according to the current ambient temperature, the current outlet liquid temperature, the current inlet liquid temperature, and the current high-pressure pressure of the compressor, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature; in the "water tank-only refrigeration" mode, adjusting the fan duty ratio based on a second preset control strategy according to the current ambient temperature and the current outlet liquid temperature, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature; in the "combined refrigeration" mode, adjusting the target speed of the compressor and the fan duty ratio based on a third preset control strategy according to the current ambient temperature and the current outlet liquid temperature, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature. The technical solution provided by the embodiment of the present invention frequency-converts and adjusts the compressor speed and the fan duty ratio according to the current outlet liquid temperature and the current ambient temperature, performs multi-path liquid supply and cooling on the battery, and stabilizes the current outlet liquid temperature of the liquid cooling unit at a preset target outlet liquid temperature. According to the working conditions of different current ambient temperatures of the liquid cooling unit, different refrigeration modes are selected, which can not only actively strengthen the heat exchange between the cooling medium in the whole machine system and the external cold air by using the fan, actively reduce the working speed of the compressor, but also further use the temperature difference between the coolant in the whole machine system and the external environment, and use the PI algorithm to frequency-convert and adjust the fan speed to improve the heat exchange efficiency, and can achieve the effect of meeting the refrigeration demand only through natural cooling. The compressor cooling can be completely shut down, greatly reducing the energy consumption of the whole machine system and improving the COP energy efficiency ratio of the system.

[0072] Figure 2 FIG. is a flowchart of another integrated thermal management control method provided by an embodiment of the present invention. The embodiment of the present invention further refines the foregoing embodiment on the basis of the above embodiment. Refer to Figure 2 and the method includes:

[0073] S210. In response to a refrigeration operation request, obtain the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature of the liquid cooling unit, and the current high-pressure pressure of the compressor.

[0074] S211. Select a refrigeration mode of the liquid cooling unit according to the current ambient temperature and a preset temperature threshold; the preset temperature threshold includes a first preset temperature threshold, a second preset temperature threshold, a third preset temperature threshold, and a fourth preset temperature threshold.

[0075] Among them, the first preset temperature threshold is the end temperature of combined refrigeration, the second preset temperature threshold is the shutdown temperature of natural refrigeration only, the third preset temperature threshold is the start temperature of combined refrigeration, and the fourth preset temperature threshold is the start temperature of natural refrigeration only; the fourth preset temperature threshold < the second preset temperature threshold < the third preset temperature threshold < the first preset temperature threshold.

[0076] S212. When the current ambient temperature is greater than or equal to the first preset temperature threshold, control the liquid cooling unit to enter the "compressor refrigeration only" mode.

[0077] S213. When the current ambient temperature is less than or equal to the second preset temperature threshold, control the liquid cooling unit to enter the "water tank refrigeration only" mode.

[0078] S214. When the current ambient temperature is less than the first preset temperature threshold and greater than the second preset temperature threshold, control the liquid cooling unit to enter the "combined refrigeration" mode.

[0079] S215. In the "compressor refrigeration only" mode, adjust the target speed of the compressor using the PID algorithm according to the current liquid outlet temperature, and control the compressor to stop when the current liquid outlet temperature reaches the preset shutdown temperature.

[0080] Among them, the preset shutdown temperature can be preset according to the preset target liquid outlet temperature. For example, the preset shutdown temperature is the temperature value obtained by subtracting 3 from the preset target liquid outlet temperature.

[0081] S216. Turn on the fan and adjust the fan duty ratio by looking up a table according to the high-pressure pressure of the compressor, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature.

[0082] Among them, looking up the table means querying a pre-stored calibration table, which contains the corresponding relationship between the high-pressure pressure of the compressor and the fan duty ratio, and different high-pressure pressures of the compressor correspond to corresponding fan duty ratio values.

[0083] S217. Judge whether the current ambient temperature decreases.

[0084] Specifically, judge whether the current ambient temperature decreases compared with the current ambient temperature when it is greater than or equal to the first preset temperature threshold in step S212.

[0085] S218. When the current ambient temperature decreases, judge whether the current ambient temperature is less than or equal to the third preset temperature threshold; if so, execute S219; if not, execute S220.

[0086] S219. Control the liquid cooling unit to enter the "combined refrigeration" mode.

[0087] S220. Control the liquid cooling unit to continue operating in the "compressor refrigeration only" mode.

[0088] S221. In the "only water tank refrigeration" mode, turn off the compressor and open the water valve.

[0089] S222. Turn on the fan and adjust the fan duty cycle using the PID algorithm according to the current liquid outlet temperature.

[0090] S223. Determine whether the current ambient temperature is greater than the second preset temperature threshold; if so, execute S219; if not, execute S224.

[0091] S224. Control the liquid cooling unit to continue operating in the "only water tank refrigeration" mode.

[0092] S225. In the "combined refrigeration" mode, adjust the target speed of the compressor using the PID algorithm according to the current liquid outlet temperature, and control the compressor to stop when the current liquid outlet temperature reaches the preset shutdown temperature.

[0093] S226. Turn on the fan and adjust the fan duty cycle by looking up a table according to the current ambient temperature.

[0094] S227. Open the water valve and determine whether the current ambient temperature decreases.

[0095] Specifically, determine whether the current ambient temperature decreases compared to the current ambient temperature when it is less than the first preset temperature threshold and greater than the second preset temperature threshold in step S214.

[0096] S228. When the current ambient temperature decreases, determine whether the current ambient temperature is less than or equal to the fourth preset temperature threshold; if so, execute S229; if not, execute S230.

[0097] S229. Control the liquid cooling unit to enter the "only water tank refrigeration" mode.

[0098] S230. Control the liquid cooling unit to continue operating in the "combined refrigeration" mode.

[0099] S231. When the current ambient temperature does not decrease, determine whether the current ambient temperature is greater than the first preset temperature threshold; if so, execute S232; if not, execute S230.

[0100] S232. Control the liquid cooling unit to enter the "only compressor refrigeration" mode.

[0101] The technical solution provided by the embodiment of the present invention integrates an intelligent control method for the working modes of "only water tank refrigeration", "only compressor refrigeration", and "combined refrigeration". According to different current ambient temperatures, different refrigeration modes of the liquid cooling unit are selected. Under different refrigeration modes, the compressor speed and the fan duty cycle are adjusted frequency conversion according to the current inlet and outlet liquid temperatures and the current ambient temperature, so as to reduce the annual operating energy consumption of the liquid cooling unit system.

[0102] In some other embodiments, optionally, before step S110, it further includes:

[0103] Execute the initialization process.

[0104] Specifically, as Figure 3 shown, Figure 3 The initialization flowchart provided by the embodiment of the present invention is as follows:

[0105] S310. Determine whether the power supply is 380V; if so, execute S320.

[0106] S320. Power on the AC-DC.

[0107] Specifically, convert the alternating current of 380V into direct current to supply power to related devices or circuits.

[0108] S330. Initialize the bus clock, initialize the CAN bus, initialize the PWM generator, initialize the AD acquisition, initialize the watchdog, initialize the digital I0 port, initialize the timer, and initialize the CAN diagnosis.

[0109] Specifically, bus clock initialization is to set parameters such as the clock frequency and phase of various buses in the system (such as the internal bus, peripheral bus, etc.). The purpose is to ensure that each hardware module can work under a unified and appropriate clock signal, guaranteeing the accuracy and stability of data transmission and processing. CAN bus initialization is to configure various parameters of the CAN controller so that the CAN bus can normally send and receive data, realizing reliable communication between different nodes. PWM generator initialization is to set relevant parameters of the PWM generator to generate PWM signals that meet the requirements to satisfy the requirements of different application scenarios. AD acquisition initialization is to configure the parameters of the ADC (Analog-to-Digital Converter) to ensure that analog signals can be accurately acquired and converted into digital quantities. Watchdog initialization is to set relevant parameters of the watchdog. When the system has an abnormality due to reasons such as program runaway or hardware failure, the watchdog can detect it in time and take measures, such as resetting the system, to ensure the stability and reliability of the system. Digital IO port initialization is to configure parameters such as the working mode and level state of each IO port to achieve correct communication and control between the microcontroller and external devices. Timer initialization is to set parameters such as the working mode and timing time of the timer to realize functions such as timing tasks, generating precise time intervals, and event counting. CAN diagnosis initialization is to configure relevant parameters of the CAN diagnosis protocol.

[0110] S340 and EXV self-learning initialization are set to the middle position.

[0111] Specifically, the EXV (Electronic Expansion Valve) self-learning initialization set to the middle position means that when the electronic expansion valve starts or under specific conditions, it adjusts the valve opening to the middle position through its own learning mechanism.

[0112] S350, the liquid cooling unit sends and receives messages and performs self-check.

[0113] Figure 4 The following is a schematic structural diagram of an integrated thermal management control device provided by an embodiment of the present invention. Refer to Figure 4 The device includes an acquisition module 410, a selection module 420, and a control module 430.

[0114] The acquisition module 410 is used to obtain the current ambient temperature, current inlet liquid temperature, current outlet liquid temperature, and current compressor high-pressure pressure of the liquid cooling unit in response to a refrigeration operation request.

[0115] The selection module 420 is used to select the refrigeration mode of the liquid cooling unit according to the current ambient temperature and a preset temperature threshold.

[0116] The control module 430 is used to adjust the target speed of the compressor and the fan duty ratio based on the first preset control strategy according to the current ambient temperature, the current liquid outlet temperature, the current liquid inlet temperature, and the current high-pressure pressure of the compressor in the "only compression mechanism refrigeration" mode, so as to stabilize the current liquid outlet temperature of the liquid cooling unit at the preset target liquid outlet temperature.

[0117] The control module 430 is also used to adjust the fan duty ratio based on the second preset control strategy according to the current ambient temperature and the current liquid outlet temperature in the "only water tank refrigeration" mode, so as to stabilize the current liquid outlet temperature of the liquid cooling unit at the preset target liquid outlet temperature.

[0118] The control module 430 is also used to adjust the target speed of the compressor based on the third preset control strategy according to the current ambient temperature and the current liquid outlet temperature in the "combined refrigeration" mode, so as to stabilize the current liquid outlet temperature of the liquid cooling unit at the preset target liquid outlet temperature.

[0119] The integrated thermal management control device provided by the embodiments of the present invention can execute the integrated thermal management control method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0120] Figure 5 It is a schematic structural diagram of an electronic device for an integrated thermal management control method provided by an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0121] As Figure 5 shown, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc. Among them, the memory stores a computer program executable by at least one processor. The processor 11 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. The input / output (I / O) interface 15 is also connected to the bus 14.

[0122] Multiple components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disc, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0123] The processor 11 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as an integrated thermal management control method.

[0124] In some embodiments, the integrated thermal management control method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the integrated thermal management control method described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the integrated thermal management control method by any other suitable means (e.g., by means of firmware).

[0125] The various embodiments of the systems and technologies described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs, which can be executed and / or interpreted on a programmable system including at least one programmable processor, the programmable processor can be a dedicated or general-purpose programmable processor, can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0126] A computer program for implementing the method of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, a special purpose computer, or other programmable data processing device, such that when the computer programs are executed by the processor, the functions / operations specified in the flowchart and / or block diagram are implemented. The computer programs can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine, or entirely on a remote machine or server.

[0127] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0128] In order to provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0129] The systems and techniques described herein can be implemented in a computing system including backend components (e.g., as a data server), or a computing system including middleware components (e.g., an application server), or a computing system including frontend components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by digital data communication in any form or medium (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0130] A computing system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, solving the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0131] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0132] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated thermal management control method, characterized in that, Including: In response to a refrigeration operation request, obtain the current ambient temperature, the current inlet liquid temperature, the current outlet liquid temperature, and the current high-pressure pressure of the compressor of the liquid cooling unit; Select the refrigeration mode of the liquid cooling unit according to the current ambient temperature and a preset temperature threshold; In the "compressor-only refrigeration" mode, based on a first preset control strategy, adjust the target speed of the compressor and the fan duty ratio according to the current ambient temperature, the current outlet liquid temperature, the current inlet liquid temperature, and the current high-pressure pressure of the compressor, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature; In the "water tank-only refrigeration" mode, based on a second preset control strategy, adjust the fan duty ratio according to the current ambient temperature and the current outlet liquid temperature, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature; In the "combined refrigeration" mode, based on a third preset control strategy, adjust the target speed of the compressor and the fan duty ratio according to the current ambient temperature and the current outlet liquid temperature, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature.

2. The integrated thermal management control method according to claim 1, wherein The preset temperature threshold includes a first preset temperature threshold and a second preset temperature threshold; The selecting the refrigeration mode of the liquid cooling unit according to the current ambient temperature and the preset temperature threshold includes: When the current ambient temperature is greater than or equal to the first preset temperature threshold, control the liquid cooling unit to enter the "compressor-only refrigeration" mode; When the current ambient temperature is less than or equal to the second preset temperature threshold, control the liquid cooling unit to enter the "water tank-only refrigeration" mode; When the current ambient temperature is less than the first preset temperature threshold and greater than the second preset temperature threshold, control the liquid cooling unit to enter the "combined refrigeration" mode.

3. The integrated thermal management control method according to claim 1, wherein The adjusting the target speed of the compressor and the fan duty ratio based on a first preset control strategy according to the current ambient temperature, the current outlet liquid temperature, the current inlet liquid temperature, and the current high-pressure pressure of the compressor in the "compressor-only refrigeration" mode so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature includes: In the "compressor-only refrigeration" mode, adjust the target speed of the compressor by using a PID algorithm according to the current outlet liquid temperature, and when the current outlet liquid temperature reaches a preset shutdown temperature, control the compressor to shut down; Turn on the fan, and adjust the fan duty ratio by looking up a table according to the high-pressure pressure of the compressor, so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature.

4. The integrated thermal management control method according to claim 3, wherein, The preset temperature threshold further includes a third preset temperature threshold; After the turning on the fan and adjusting the fan duty ratio by looking up a table according to the high-pressure pressure of the compressor, it further includes: When the current ambient temperature decreases, determine whether the current ambient temperature is less than or equal to the third preset temperature threshold; If so, control the liquid cooling unit to enter the "combined refrigeration" mode; if not, control the liquid cooling unit to continue operating in the "compressor-only refrigeration" mode.

5. The integrated thermal management control method according to claim 1, wherein The adjusting the fan duty ratio based on a second preset control strategy according to the current ambient temperature and the current outlet liquid temperature in the "water tank-only refrigeration" mode so that the current outlet liquid temperature of the liquid cooling unit is stabilized at a preset target outlet liquid temperature includes: In the "only water tank refrigeration" mode, the compressor is turned off and the water valve is opened; The fan is turned on, and the duty cycle of the fan is adjusted using the PID algorithm according to the current liquid outlet temperature; It is judged whether the current ambient temperature is greater than the second preset temperature threshold; If so, the liquid cooling unit is controlled to enter the "combined refrigeration" mode; if not, the liquid cooling unit is controlled to continue operating in the "only water tank refrigeration" mode.

6. The integrated thermal management control method according to claim 1, wherein, The preset temperature threshold further includes a fourth preset temperature threshold; In the "combined refrigeration" mode, according to the current ambient temperature and the current liquid outlet temperature, the target speed of the compressor and the duty cycle of the fan are adjusted based on the third preset control strategy, so that the current liquid outlet temperature of the liquid cooling unit is stabilized at the preset target liquid outlet temperature, including: In the "combined refrigeration" mode, according to the current liquid outlet temperature, the PID algorithm is used to adjust the target speed of the compressor, and when the current liquid outlet temperature reaches the preset shutdown temperature, the compressor is controlled to stop; The fan is turned on, and the duty cycle of the fan is adjusted by looking up a table according to the current ambient temperature; The water valve is opened, and when the current ambient temperature decreases, it is judged whether the current ambient temperature is less than or equal to the fourth preset temperature threshold; If so, the liquid cooling unit is controlled to enter the "only water tank refrigeration" mode; if not, the liquid cooling unit is controlled to continue operating in the "combined refrigeration" mode.

7. The integrated thermal management control method according to claim 6, characterized in that, After the water valve is opened, it further includes: When the current ambient temperature does not decrease, it is judged whether the current ambient temperature is greater than the first preset temperature threshold; If so, the liquid cooling unit is controlled to enter the "only compressor refrigeration" mode; if not, the liquid cooling unit is controlled to continue operating in the "combined refrigeration" mode.

8. The integrated thermal management control method according to any one of claims 2-7, characterized in that, The fourth preset temperature threshold < the second preset temperature threshold < the third preset temperature threshold < the first preset temperature threshold.

9. The integrated thermal management control method according to claim 1, wherein, Before responding to the refrigeration operation request and obtaining the current ambient temperature, current inlet temperature, current outlet temperature and current high pressure of the compressor of the liquid cooling unit, it further includes: Execute the initialization process.

10. An integrated thermal management control device, characterized in that, It includes: An acquisition module, which is used to respond to the refrigeration operation request and obtain the current ambient temperature, current inlet temperature, current outlet temperature and current high pressure of the compressor of the liquid cooling unit; A selection module, which is used to select the refrigeration mode of the liquid cooling unit according to the current ambient temperature and the preset temperature threshold; A control module, which is used to, in the "only compressor refrigeration" mode, adjust the target speed of the compressor and the duty cycle of the fan based on the first preset control strategy according to the current ambient temperature, the current outlet temperature, the current inlet temperature and the current high pressure of the compressor, so that the current outlet temperature of the liquid cooling unit is stabilized at the preset target outlet temperature; The control module is further used to, in the "only water tank refrigeration" mode, adjust the duty cycle of the fan based on the second preset control strategy according to the current ambient temperature and the current outlet temperature, so that the current outlet temperature of the liquid cooling unit is stabilized at the preset target outlet temperature; The control module is further configured to, in the "combined refrigeration" mode, adjust the target speed of the compressor and the duty cycle of the fan based on a third preset control strategy according to the current ambient temperature and the current liquid outlet temperature, so as to stabilize the current liquid outlet temperature of the liquid cooling unit at a preset target liquid outlet temperature.

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