Charging control method and equipment of full liquid cooling charging pile and medium

Abstract

The invention discloses a charging control method and device for a full liquid cooling charging pile and a medium, and the method comprises the steps: collecting the charging information needed by the full liquid cooling charging pile during charging, inputting the charging information into a preset LSTM model, and obtaining a corresponding power grid load prediction value; according to the power grid load prediction value, a charging power upper limit value corresponding to the full liquid cooling charging pile is determined; when it is detected that the full-liquid-cooling charging pile is in the charging state, the battery is charged according to the charging power upper limit value, and a corresponding temperature control protection strategy is executed on a liquid cooling module according to the real-time temperature gradient corresponding to the liquid cooling module in the full-liquid-cooling charging pile; and acquiring a charging rate corresponding to the battery through the battery management system interface, determining that the battery is charged when the charging rate is greater than a preset value, and controlling the full-liquid-cooling charging pile to enter a low-power-consumption mode.

Description

Technical Field

[0001] This application relates to the field of charging control technology, and particularly to a charging control method, device, and medium for a fully liquid-cooled charging pile. Background Art

[0002] With the surge in the demand for high-power fast charging in new energy vehicles, the thermal management technology of charging piles faces severe challenges. Traditional high-power charging piles mostly use passive air cooling or natural heat dissipation. For example, air-cooled charging piles dissipate heat through the cooperation of multiple fans. However, the heat dissipation efficiency of this heat dissipation method is difficult to match the requirements of high-power operation, resulting in a sharp increase in the temperature gradient of key modules when the charging pile operates at high load. This not only causes a decline in charging efficiency but also easily triggers over-temperature protection frequently, leading to charging interruption. Summary of the Invention

[0003] To solve the above problems, this application proposes a charging control method for a fully liquid-cooled charging pile, including:

[0004] Collect the charging information required when the fully liquid-cooled charging pile is charging, input the charging information into a preset LSTM model, and obtain the corresponding power grid load prediction value;

[0005] Determine the upper limit value of the charging power corresponding to the fully liquid-cooled charging pile according to the power grid load prediction value;

[0006] When it is detected that the fully liquid-cooled charging pile is in the charging state, charge the battery according to the upper limit value of the charging power, and execute the corresponding temperature control protection strategy for the liquid-cooling module according to the real-time temperature gradient corresponding to the liquid-cooling module in the fully liquid-cooled charging pile;

[0007] Obtain the charging rate corresponding to the battery through the battery management system interface. When the charging rate is greater than the preset value, determine that the battery is fully charged, and control the fully liquid-cooled charging pile to enter the low-power mode.

[0008] In an implementation manner of this application, executing the corresponding temperature control protection strategy for the liquid-cooling module according to the real-time temperature gradient corresponding to the liquid-cooling module in the fully liquid-cooled charging pile specifically includes:

[0009] Collect the temperature values corresponding to the liquid-cooling module within a preset time period through the temperature sensors set in the liquid-cooling module of the fully liquid-cooled charging pile;

[0010] Calculate the real-time temperature gradient of the liquid-cooling module within the preset time period according to the temperature values;

[0011] When the real-time temperature gradient is greater than the preset gradient, trigger the liquid-cooling module to perform temperature control protection, and execute the corresponding temperature control protection strategy according to the duration of the real-time temperature gradient.

[0012] In one implementation of the present application, according to the duration of the real-time temperature gradient, a corresponding temperature control protection strategy is executed, which specifically includes:

[0013] When the duration of the real-time temperature gradient is not greater than the preset duration, control the coolant pump speed to decrease to the rated value, and control the standby cooling fan to turn on;

[0014] When the duration of the real-time temperature gradient is greater than the preset duration, control the charging power of the battery to decrease to the preset charging power, and send an adjustment request to the battery management system, so that the battery management system adjusts the charging curve of the battery according to the adjustment request.

[0015] In one implementation of the present application, after collecting the temperature values corresponding to the liquid cooling module within the preset duration, the method further includes:

[0016] Determine the temperature difference between the temperature value and the preset temperature value;

[0017] Control the stage duration of the charging stage of the all-liquid-cooled charging pile according to the temperature difference.

[0018] In one implementation of the present application, controlling the stage duration of the charging stage of the all-liquid-cooled charging pile according to the temperature difference specifically includes:

[0019] Determine the standard duration ratio corresponding to each charging stage; wherein, the charging stage includes a constant current stage and a constant voltage stage;

[0020] According to the mapping relationship between the preset temperature difference and the correction coefficient, determine the correction coefficient corresponding to the temperature difference; wherein, there is a negative correlation between the temperature difference and the correction coefficient;

[0021] According to the correction coefficient, correct the standard duration ratio corresponding to the constant current stage, so as to control the stage duration of the charging stage through the corrected standard duration ratio.

[0022] In one implementation of the present application, determining the upper limit value of the charging power corresponding to the all-liquid-cooled charging pile according to the grid load prediction value specifically includes:

[0023] Obtain the allowable power upper limit value of the battery;

[0024] Compare the grid load prediction value with the allowable power upper limit value, and select the smaller value as the upper limit value of the charging power corresponding to the all-liquid-cooled charging pile.

[0025] In one implementation of the present application, after performing the corresponding temperature control protection strategy on the liquid cooling module, the method further includes:

[0026] Using the coolant circulation system as the main heat dissipation path, performing multi-channel parallel heat dissipation on the liquid cooling module, and obtaining the coolant outlet temperature in the coolant circulation system;

[0027] When the coolant outlet temperature is greater than a preset threshold, controlling to turn on the axial flow fan to perform auxiliary heat dissipation through the axial flow fan.

[0028] In one implementation of the present application, controlling to turn on the axial flow fan to perform auxiliary heat dissipation through the axial flow fan specifically includes:

[0029] Controlling to turn on the axial flow fan and determining the wind speed corresponding to the axial flow fan through the following formula:

[0030]

[0031] where s represents the wind speed, T c represents the coolant outlet temperature, T t represents the target temperature, T e represents the temperature error between the coolant outlet temperature and the target temperature, K p 、K i 、K d respectively represent the proportional term, the integral term, and the differential term.

[0032] An embodiment of the present application provides a charging control device for a fully liquid-cooled charging pile, and the device includes:

[0033] At least one processor;

[0034] And a memory communicatively connected to the at least one processor;

[0035] wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute a charging control method for a fully liquid-cooled charging pile as described in any one of the above.

[0036] An embodiment of the present application provides a non-volatile computer storage medium storing computer-executable instructions, and the computer-executable instructions are set as:

[0037] A charging control method for a fully liquid-cooled charging pile as described in any one of the above.

[0038] The charging control method for a fully liquid-cooled charging pile proposed by the present application can bring the following beneficial effects:

[0039] Dynamically predict the power grid load, and flexibly adjust the upper limit of the charging power according to the real-time carrying capacity of the power grid, which not only avoids the risk of power grid overload, but also provides a control benchmark for the liquid cooling system to match the actual heat load, reducing the hidden danger of overheating from the source. The all-liquid-cooled design combined with the hierarchical temperature control strategy based on the temperature gradient makes use of the high-efficiency heat conduction characteristics of the liquid medium and the precise temperature monitoring mechanism to effectively suppress the abnormal increase in temperature during high-power charging, greatly reducing the attenuation of charging efficiency caused by overheating and the triggering frequency of over-temperature protection, ensuring the continuous and stable charging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0041] Figure 1 It is a schematic flow chart of a charging control method for an all-liquid-cooled charging pile provided by an embodiment of the present application;

[0042] Figure 2 It is a schematic structural diagram of a charging control device for an all-liquid-cooled charging pile provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0044] The technical solutions provided by each embodiment of the present application will be described in detail below in conjunction with the drawings.

[0045] As Figure 1 shown, a charging control method for an all-liquid-cooled charging pile provided by an embodiment of the present application, the charging pile main control board, includes:

[0046] S101: Collect the charging information required when the all-liquid-cooled charging pile is charging, input the charging information into a preset LSTM model, and obtain the corresponding power grid load prediction value.

[0047] The all - liquid - cooled charging pile uses liquid as the cooling medium, which can efficiently carry away the heat generated during the charging process, ensuring the stability and safety of the charging pile during high - power operation, and avoiding the decrease in charging efficiency or equipment damage caused by overheating. The all - liquid - cooled charging pile integrates an all - liquid - cooled charging module inside. There is a liquid - cooling plate inside the all - liquid - cooled charging module, and the liquid - cooling plate can directly contact power devices such as IGBTs and MOSFETs. The coolant circulation path covers all heating elements, drives the closed - loop flow through a micro - pump, and the radiator exchanges heat with the external environment, and is assisted by an intelligent temperature - controlled fan for heat dissipation. In addition to the all - liquid - cooled charging module, the all - liquid - cooled charging pile is also equipped with an intelligent temperature - control system. Through the collaborative control between the main control board of the charging pile and the sensors, it can monitor the temperature values of key nodes in the liquid - cooling module in real time, and adjust the coolant flow rate and fan speed based on the PID algorithm to ensure that the liquid - cooling module always maintains within the optimal temperature range.

[0048] Before the all - liquid - cooled charging pile charges the battery, it is necessary to predict the current grid load. Then, based on the predicted grid load value, a reasonable upper limit of the charging power is set to reasonably arrange the power generation resources, avoid grid failures caused by excessive load, and improve the energy utilization efficiency. When predicting the grid load, various factors such as historical grid load data, meteorological information, date type, and electricity price period distribution need to be comprehensively considered. Therefore, with the help of the built - in sensors of the charging pile, the module temperature (thermocouple sensor), charging power (current / voltage sensor), coolant flow rate (flow meter), and ambient temperature and humidity data are collected in real time, as well as the charging information such as historical grid load data and date type. After the charging information is completed and processed, the pre - processed charging information is used as input and fed into a pre - trained LSTM model. The LSTM model is trained on a large amount of historical charging data. The LSTM model calculates and infers based on the input charging information using its internal neurons and gating mechanisms, so as to capture the dynamic characteristics of the charging process, and finally outputs a corresponding grid load prediction value. The grid load prediction value is used to dynamically adjust the upper limit of the charging power of the all - liquid - cooled charging pile.

[0049] S102: Determine the upper limit value of the charging power corresponding to the all - liquid - cooled charging pile according to the grid load prediction value.

[0050] The grid load prediction value is the total power load that the grid needs to bear in a future period predicted through historical data and real - time charging information, which reflects the carrying capacity of the grid at a specific moment. On this basis, if we want to determine the upper limit value of the charging power corresponding to the all - liquid - cooled charging pile, it is also necessary to determine it in combination with the allowable power upper limit value of the all - liquid - cooled charging pile. The allowable power upper limit value refers to the maximum value of the battery's safe charging power, which is determined by the characteristics of the battery itself and is the key threshold to ensure battery safety.

[0051] Therefore, after obtaining the allowable power upper limit value of the battery, it is necessary to compare the grid load prediction value with the allowable power upper limit value to select the smaller value as the charging power upper limit value corresponding to the all-liquid-cooled charging pile. When the grid load prediction value is less than the allowable power upper limit value, it indicates that the current remaining capacity is insufficient to support the maximum safe charging power of the battery. At this time, the grid constraint is taken as the standard to avoid grid overload caused by too high charging pile power and ensure the stable operation of the grid. When the allowable power upper limit value is less than the grid load prediction value, it means that the battery itself cannot withstand the power provided by the grid due to state limitations. At this time, the battery constraint is taken as the standard to avoid battery damage caused by over-power charging, extend the battery life and eliminate the risk of thermal runaway.

[0052] S103: When it is detected that the all-liquid-cooled charging pile is in the charging state, charge the battery according to the charging power upper limit value, and execute the corresponding temperature control protection strategy for the liquid cooling module according to the real-time temperature gradient corresponding to the liquid cooling module in the all-liquid-cooled charging pile.

[0053] The main control board detects the plugging and unplugging state of the charging gun through a Hall sensor. When the gun is not plugged in, a sleep command is triggered. At this time, non-core modules (such as display screens, advertising light boxes, etc.) preferentially enter the low-power mode, and core modules (such as the main control board, BMS communication unit) maintain the lowest operating state. If there is no charging request for 30 consecutive minutes, the main control board will control the charging module relay to disconnect, and the coolant pump speed will be reduced to 10% to maintain the anti-freezing cycle. When it is detected that the charging pile is in the gun-plugged state, it indicates that the current all-liquid-cooled charging pile is already in the charging state. At this time, it is necessary to charge the battery according to the charging power upper limit value determined above. The power conversion module of the charging pile dynamically adjusts the output current and voltage according to the charging power upper limit value. Charging the battery with the maximum allowable charging power can effectively improve the charging efficiency. However, during the charging process, in order to prevent the charging pile from generating over-temperature protection due to high-load operation, it is also necessary to monitor the actual temperature state of the liquid cooling module. The liquid cooling module is the core heat dissipation component of the all-liquid-cooled charging pile, including a coolant circulation pipeline, a heat dissipation pump, a heat exchanger, a temperature sensor, etc., and realizes heat exchange through liquid flow to maintain the core components of the equipment within the safe temperature range. According to the real-time temperature gradient corresponding to the liquid cooling module, the operating efficiency of the heat dissipation system can be effectively evaluated. In this way, the corresponding temperature control protection strategy can be executed for the liquid cooling module according to the evaluation result to achieve the adaptive adjustment of the charging power.

[0054] In one embodiment, key nodes of the liquid cooling module, such as IGBTs, DC / DC converters, etc., are provided with PT100 temperature sensors. The PT100 temperature sensors sample at a fixed sampling frequency of 1 Hz to collect the temperature values of the liquid cooling module within a preset duration. The preset duration can be set according to actual operating requirements, and the present application does not specifically limit this. According to the ratio between the temperature value and the preset duration, the real-time temperature gradient of the liquid cooling module within the preset duration can be calculated. By calculating the real-time temperature gradient, the heat dissipation efficiency of the liquid cooling module can be intuitively understood. If the temperature gradient is large, it indicates that the temperature of the liquid cooling module changes rapidly within the preset duration, and there may be a situation of poor heat dissipation; on the contrary, if the temperature gradient is small, it indicates that the heat dissipation condition is relatively good. Therefore, by comparing the calculated real-time temperature gradient with the preset gradient, it can be determined whether the current liquid cooling module needs to trigger temperature control protection. The preset gradient is a threshold preset according to factors such as the design performance of the liquid cooling module and the working environment of the charging pile. If the real-time temperature gradient is less than or equal to the preset gradient, it indicates that the heat dissipation of the liquid cooling module is normal and no additional temperature control protection operation is required; while when the real-time temperature gradient is greater than the preset gradient, it means that the liquid cooling module may have abnormal heat dissipation and corresponding temperature control protection strategies need to be adopted.

[0055] The temperature control protection strategy is divided into two response levels according to the duration of the real-time temperature gradient. One is the first-level response, which is used for temporary temperature fluctuations caused by instantaneous load changes or environmental factors, and the other is the second-level response, which is applicable to long-term abnormal heat dissipation situations. When the main control board determines that the duration of the real-time temperature gradient is not greater than the preset duration, it indicates that the abnormal heat dissipation situation of the liquid cooling module is relatively mild. At this time, the main control board will control the coolant pump speed to be reduced to the rated value, and the rated value can generally be set to 120%, and control the activation of the standby cooling fan. When the abnormal duration of the temperature gradient is short, reducing the pump speed to the rated value can not only meet the current heat dissipation requirements but also avoid the wear and increased energy consumption caused by the long-term high-speed operation of the pump. At the same time, activating the standby cooling fan can increase the additional heat dissipation capacity, assist the liquid cooling module in heat dissipation, further reduce the temperature of the liquid cooling module, and restore the temperature gradient to the normal range.

[0056] However, if the duration of the real-time temperature gradient exceeds the preset duration, it indicates that the liquid cooling module is in a continuous over-temperature state. At this time, the charging power of the battery needs to be reduced to the preset charging power. Generally, the preset charging power is set to 80% of the current charging power. By reducing the charging power, the heat generated by the battery during charging can be reduced, thereby alleviating the heat dissipation burden of the liquid cooling module. On the other hand, in addition to reducing the charging power, it is also necessary to adjust the charging curve of the battery. The main control board will send an adjustment request to the Battery Management System (BMS). After receiving the adjustment request, the battery management system will adjust the charging curve according to the current state of the battery and the preset rules. For example, it may adjust the magnitude of the charging current, the division of the charging stage, etc., so that the battery can be charged under a milder condition, further reducing heat generation.

[0057] In the embodiment of the present application, by adopting temperature control protection strategies with different response levels, it is possible to, on the basis of effectively judging the degree of abnormal heat dissipation, adopt appropriate temperature control protection strategies to avoid damage to the charging pile and the battery caused by overheating. When the duration is not greater than the preset duration, by reducing the coolant pump speed and turning on the standby cooling fan, the temporary heat dissipation problem can be solved without affecting normal charging, ensuring the stable operation of the system. When the duration is greater than the preset duration, although reducing the charging power and adjusting the charging curve will slow down the charging speed, it can effectively reduce heat generation, protect the safety of the battery and the charging pile equipment, and avoid problems such as equipment failures, shortened battery life, and even safety accidents caused by overheating.

[0058] In one embodiment, the temperature of the liquid cooling module directly affects the heat generation and heat dissipation balance during charging. Heat generation needs to be reduced at high temperatures, while the excess heat dissipation capacity can be utilized to increase the charging speed at low temperatures. Therefore, in addition to adjusting the charging power to implement different temperature control protection strategies, the main control board will also perform adaptive adjustment of the charging stage according to the temperature value of the liquid cooling module, so as to achieve refined control of the charging process through temperature feedback, convert the real-time state of the liquid cooling module into a time allocation strategy for the charging stage, and ensure the safe and efficient operation of the fully liquid-cooled charging pile under different temperature conditions.

[0059] Specifically, compare the temperature value of the liquid cooling module collected in real time with the preset temperature value to determine the temperature difference between the two, that is, the difference between the temperature value and the preset temperature value. The temperature difference can be positive or negative, which reflects the degree of deviation of the current temperature of the liquid cooling module from the ideal state. According to this temperature difference, the stage duration of the charging stage of the all-liquid-cooled charging pile can be controlled. The charging process is divided into a constant current stage and a constant voltage stage. The stage duration of the charging stage refers to the duration of the constant current stage and the constant voltage stage during the charging process. In the constant current stage, charging is carried out at a fixed current and the voltage gradually rises; in the constant voltage stage, charging is carried out at a fixed voltage and the current gradually decreases. The stage duration directly affects the charging speed and battery life.

[0060] In one embodiment, the main control board determines the respective standard duration ratios corresponding to the constant current stage and the constant voltage stage according to factors such as the type and capacity of the battery and the design parameters of the charging pile. The standard duration ratio is characterized by the relative ratio of the durations of the constant current stage and the constant voltage stage. For example, for a specific type of battery, the standard duration ratio of the constant current stage may be set to 55%, and the standard duration ratio of the constant voltage stage may be set to 45%. After determining the standard duration ratio, it is necessary to determine the corresponding correction coefficient according to the actually collected temperature difference of the liquid cooling module in order to adjust the duration of the constant current stage.

[0061] The mapping relationship between the temperature difference and the correction coefficient is pre-set in the main control board. According to this mapping relationship, the correction coefficient corresponding to the current temperature difference can be determined. The correction coefficient is always greater than 1, which is used to adjust the standard duration ratio of the constant current stage, and there is a negative correlation between it and the temperature difference. That is to say, when the temperature difference is large, it means that the temperature of the liquid cooling module deviates from the ideal temperature more, there may be heat dissipation problems or the battery is in a less suitable temperature environment. At this time, it is necessary to reduce the charging speed to ensure safety, and the corresponding correction coefficient will be small; on the contrary, when the temperature difference is small, the correction coefficient will be relatively large. After determining the correction coefficient, multiply the standard duration ratio of the constant current stage by the correction coefficient to obtain the corrected duration of the constant current stage.

[0062] For example, the standard duration ratio corresponding to the constant current stage is 50%, and the preset temperature value is 50°C. When the temperature value is 60°C, the current temperature value is greater than the preset temperature value, and the calculated temperature difference is a positive value of 10°C. The corresponding correction coefficient is 1.2, and the charging duration ratio corresponding to the constant current stage after correction is 60%. When the temperature is 20°C, the temperature difference is a negative value of -30°C, and the corresponding correction coefficient is larger than that in the case where the temperature value is greater than the preset temperature value, which is 1.6. At this time, the standard duration ratio of the constant current stage after correction is 80%. According to the duration ratio of the constant current stage, the duration ratio of the constant voltage stage can be calculated correspondingly. In this way, the stage duration of the charging stage can be controlled according to the real-time corrected standard duration ratio.

[0063] Through the above control logic, determining the correction coefficient according to the temperature difference and correcting the duration of the constant current stage can enable the charging pile to more reasonably control the charging process in different temperature environments. When the temperature deviates greatly from the ideal state, appropriately shorten the duration of the constant current stage, reduce the charging speed, and avoid the adverse effects caused by overheating or overcooling of the battery; when the temperature is close to the ideal state, maintain a relatively fast charging speed and improve the charging efficiency.

[0064] In one embodiment, when the fully liquid-cooled charging pile conducts charging control, in addition to dynamically adjusting the charging power and charging stage, it will also transfer the heat of heat-generating components such as power modules and cables during the charging process to the external environment through the circulating flow of the coolant. During the heat dissipation process, the coolant circulation system serves as the main heat dissipation path, and multiple parallel flow channels inside the liquid-cooling module are opened simultaneously to ensure that each heat-generating element can be directly cooled by the coolant, avoiding local temperature differences caused by insufficient single-channel flow.

[0065] The main heat dissipation path undertakes most of the heat dissipation tasks, but auxiliary means may still be required under extreme working conditions. Therefore, it is necessary to monitor the coolant outlet temperature in real time to determine whether to trigger additional heat dissipation measures. When the coolant outlet temperature is greater than the preset threshold, it indicates that the heat absorbed by the coolant exceeds its own carrying capacity, and auxiliary heat dissipation needs to be started to avoid heat accumulation. At this time, it is necessary to control the axial flow fan to be turned on to assist heat dissipation by enhancing air convection. The wind speed of the axial flow fan will be linearly adjusted according to the temperature difference by the PID algorithm. Specifically, the wind speed can be calculated by the following formula:

[0066] where s represents the wind speed, T c represents the coolant outlet temperature, T t represents the target temperature, T e represents the temperature error between the coolant outlet temperature and the target temperature, K p 、K i 、K dThey represent the proportional term, integral term, and derivative term respectively. In the embodiments of the present application, Kp is taken as 2.5, Ki is taken as 0.1, and Kd is taken as 0.05.

[0067] Adjust the fan power according to the difference between the outlet temperature and the target temperature to avoid the chain reaction caused by the continuous excessive coolant temperature. Without increasing the complexity of the liquid cooling system, through the composite heat dissipation solution of passive liquid cooling and active air cooling, the heat dissipation upper limit is improved at a low cost, supporting higher power continuous charging.

[0068] S104: Obtain the charging rate corresponding to the battery through the battery management system interface. When the charging rate is greater than the preset value, determine that the battery is fully charged, and control the all-liquid-cooled charging pile to enter the low-power mode.

[0069] During the charging process, the main control board will obtain the charging rate (State of Charge, SOC) corresponding to the battery through the BMS interface. When the SOC is greater than the preset value, it is determined that the battery is fully charged. The preset value needs to be set slightly lower than 100% to avoid actual overcharging due to BMS calculation errors or sensor noise. After determining that the charging is completed, the main control board will control the all-liquid-cooled charging pile to enter the low-power mode. First, cut off the power supply of the charging module. Second, control the coolant pump speed to drop to the maintenance flow rate (0.5 L / min) to prevent the coolant from solidifying. In addition, in the low-power mode, the display screen switches to the black-and-white low-refresh-rate mode, and the network communication module switches to the heartbeat packet mode.

[0070] The above is the method embodiment proposed by the present application. Based on the same idea, some embodiments of the present application also provide the devices and non-volatile computer storage media corresponding to the above method.

[0071] Figure 2 It is a schematic structural diagram of a charging control device for an all-liquid-cooled charging pile provided by an embodiment of the present application. As Figure 2 shown, it includes:

[0072] At least one processor; and,

[0073] A memory communicatively connected to at least one processor; wherein,

[0074] The memory stores instructions executable by at least one processor. The instructions are executed by at least one processor to enable at least one processor to execute a charging control method for an all-liquid-cooled charging pile as described in any one of the above.

[0075] The embodiment of the present application provides a non-volatile computer storage medium storing computer-executable instructions, and the computer-executable instructions are set as: a charging control method for an all-liquid-cooled charging pile as described in any one of the above.

[0076] The embodiments in the present application are all described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the embodiments of the device and the medium, since they are basically similar to the method embodiments, the description is relatively simple, and reference can be made to the corresponding parts of the method embodiments for relevant details.

[0077] The device and the medium provided by the embodiments of the present application correspond one-to-one with the method. Therefore, the device and the medium also have beneficial technical effects similar to those of the corresponding method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the device and the medium will not be elaborated here.

[0078] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can be implemented in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can be implemented in 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 code.

[0079] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one or more flows and / or Figure 1 blocks or multiple blocks.

[0080] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in Figure 1 one or more flows and / or Figure 1 blocks or multiple blocks.

[0081] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 steps of the functions specified in one block or multiple blocks.

[0082] In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and memory.

[0083] The memory may include non-permanent memory in the computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory such as read-only memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

[0084] Computer-readable media includes permanent and non-permanent, removable and non-removable media and can store information by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0085] It should also be noted that the term "comprises", "comprising", or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or device that comprises a series of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or device that comprises the element.

[0086] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A charging control method for a fully liquid-cooled charging pile, characterized in that, Applied to the main control board of a charging pile, the method includes: Collect the charging information required when a fully liquid-cooled charging pile is charging, input the charging information into a preset LSTM model, and obtain the corresponding grid load prediction value; Determine the upper limit value of the charging power corresponding to the fully liquid-cooled charging pile according to the grid load prediction value; When it is detected that the fully liquid-cooled charging pile is in the charging state, charge the battery according to the upper limit value of the charging power, and execute the corresponding temperature control protection strategy for the liquid-cooled module according to the real-time temperature gradient corresponding to the liquid-cooled module in the fully liquid-cooled charging pile; Obtain the charging rate corresponding to the battery through the battery management system interface. When the charging rate is greater than a preset value, determine that the battery is fully charged, and control the fully liquid-cooled charging pile to enter the low-power mode.

2. The charging control method of a fully liquid-cooled charging pile according to claim 1, characterized in that, Executing the corresponding temperature control protection strategy for the liquid-cooled module according to the real-time temperature gradient corresponding to the liquid-cooled module in the fully liquid-cooled charging pile specifically includes: Collect the temperature values corresponding to the liquid-cooled module within a preset time period through the temperature sensors set in the liquid-cooled module of the fully liquid-cooled charging pile; Calculate the real-time temperature gradient of the liquid-cooled module within the preset time period according to the temperature values; When the real-time temperature gradient is greater than a preset gradient, trigger the liquid-cooled module to perform temperature control protection, and execute the corresponding temperature control protection strategy according to the duration of the real-time temperature gradient.

3. The charging control method of a fully liquid-cooled charging pile according to claim 2, characterized in that, Executing the corresponding temperature control protection strategy according to the duration of the real-time temperature gradient specifically includes: When the duration of the real-time temperature gradient is not greater than a preset time period, control the coolant pump speed to decrease to the rated value, and control the standby cooling fan to turn on; When the duration of the real-time temperature gradient is greater than a preset time period, control the charging power of the battery to decrease to a preset charging power, and send an adjustment request to the battery management system so that the battery management system adjusts the charging curve of the battery according to the adjustment request.

4. The charging control method of a fully liquid-cooled charging pile according to claim 2, wherein, After collecting the temperature values corresponding to the liquid-cooled module within a preset time period, the method further includes: Determine the temperature difference between the temperature value and the preset temperature value; Control the stage duration of the charging stage of the fully liquid-cooled charging pile according to the temperature difference.

5. The charging control method of a fully liquid-cooled charging pile according to claim 4, characterized in that Controlling the stage duration of the charging stage of the fully liquid-cooled charging pile according to the temperature difference specifically includes: Determine the standard duration ratio corresponding to each charging stage; wherein, the charging stage includes a constant current stage and a constant voltage stage; Determine the correction coefficient corresponding to the temperature difference according to the mapping relationship between the preset temperature difference and the correction coefficient; wherein, there is a negative correlation between the temperature difference and the correction coefficient; Correct the standard duration ratio corresponding to the constant current stage according to the correction coefficient, so as to control the stage duration of the charging stage through the corrected standard duration ratio.

6. The charging control method of a fully liquid-cooled charging pile according to claim 1, characterized in that Determining the upper limit value of the charging power corresponding to the fully liquid-cooled charging pile according to the grid load prediction value specifically includes: Obtain the allowable power upper limit value of the battery; Compare the predicted value of the power grid load with the upper limit value of the allowable power, and select the smaller value as the upper limit value of the charging power corresponding to the all-liquid-cooled charging pile.

7. The charging control method of a fully liquid-cooled charging pile according to claim 1, characterized in that After implementing the corresponding temperature control protection strategy for the liquid-cooled module, the method further includes: Using the coolant circulation system as the main heat dissipation path, performing multi-channel parallel heat dissipation on the liquid-cooled module, and obtaining the coolant outlet temperature in the coolant circulation system. When the coolant outlet temperature is greater than a preset threshold, control the axial flow fan to be turned on for auxiliary heat dissipation through the axial flow fan.

8. A charging control method for a fully liquid-cooled charging pile according to claim 7, characterized in that, Controlling the axial flow fan to be turned on for auxiliary heat dissipation through the axial flow fan specifically includes: Controlling the axial flow fan to be turned on, and determining the wind speed corresponding to the axial flow fan through the following formula: Among them, s represents the wind speed, T c represents the coolant outlet temperature, T t represents the target temperature, T e represents the temperature error between the coolant outlet temperature and the target temperature, K p 、K i 、K d represent the proportional term, the integral term and the differential term respectively.

9. A charging control device for a fully liquid-cooled charging pile, characterized in that, The device includes: At least one processor; And a memory communicatively connected to the at least one processor; Wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute a charging control method for an all-liquid-cooled charging pile according to any one of claims 1-8.

10. A non-volatile computer storage medium stores computer-executable instructions, characterized in that, The computer-executable instructions are set to: A charging control method for an all-liquid-cooled charging pile according to any one of claims 1-8.

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