Electrolytic preparation system of metallic sodium and control method thereof

Abstract

The invention discloses an electrolytic preparation system of metal sodium and a control method thereof, and relates to the technical field of electrolytic preparation. The system comprises a photovoltaic power generation unit which is used for converting solar energy into direct current electric energy; the flexible electrolytic cell unit is connected with the output end of the photovoltaic power generation unit and is used for electrolyzing electrolyte under direct current power supply so as to prepare metal sodium; the energy storage frequency modulation unit comprises a plurality of energy storage batteries, and the energy storage frequency modulation unit is connected with the output end of the photovoltaic power generation unit and further connected with the flexible electrolytic cell unit; and the control unit is used for monitoring at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit and the energy storage frequency modulation unit to obtain a monitoring result, and regulating and controlling at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit and the energy storage frequency modulation unit. According to the embodiment of the invention, green sustainable development of the electrolytic sodium industry can be realized based on photovoltaic green electricity and energy storage.

Description

Technical Field

[0001] This application belongs to the technical field of electrolysis preparation, and particularly relates to an electrolysis preparation system for metallic sodium and its control method. Background Art

[0002] At present, with the accelerating transformation of the global energy structure towards cleaner energy, metallic sodium, as an important industrial raw material, urgently needs a green innovation in its preparation process. The current mainstream molten sodium chloride electrolysis method has two core pain points: firstly, it relies on fossil fuel power generation, resulting in high carbon dioxide emissions; secondly, the grid power supply mode makes the energy cost vulnerable to electricity price fluctuations, leading to too high a proportion of electricity cost in the total production cost. Although some studies have attempted to introduce renewable energy into the electrolysis process, there is an inherent contradiction between the intermittency of renewable energy and the continuous demand of the electrolysis process. Therefore, there are problems such as high electrical energy conversion loss and high cost in the prior art.

[0003] Based on this, the industry still urgently needs a green and low-carbon electrolysis preparation solution for metallic sodium to achieve the green and sustainable development of the electrolytic sodium industry, thereby promoting the green and low-carbon development of the electrolytic metal industry. Summary of the Invention

[0004] The embodiments of this application provide an electrolysis preparation system for metallic sodium and its control method, which can achieve clean and efficient production of metallic sodium, contribute to the green and sustainable development of the electrolytic sodium industry, and thus promote the large-scale application of sodium production from renewable energy.

[0005] In the first aspect, the embodiments of this application provide an electrolysis preparation system for metallic sodium, and the electrolysis preparation system includes:

[0006] A photovoltaic power generation unit, which is used to convert solar energy into direct current electrical energy;

[0007] A flexible electrolytic cell unit, which is connected to the output end of the photovoltaic power generation unit and is used to electrolyze the electrolyte under direct current power supply to prepare metallic sodium;

[0008] A energy storage and frequency modulation unit, which includes a plurality of energy storage batteries. The energy storage and frequency modulation unit is connected to the output end of the photovoltaic power generation unit and is used to charge under the direct current electrical energy output of the photovoltaic power generation unit;

[0009] The energy storage and frequency modulation unit is also connected to the flexible electrolytic cell unit and is used to supply power to the flexible electrolytic cell unit;

[0010] A control unit, which is used to monitor at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage and frequency modulation unit to obtain a monitoring result, and based on the monitoring result, regulate at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage and frequency modulation unit.

[0011] In some possible embodiments, the control unit is configured to:

[0012] Monitor the output power of the photovoltaic power generation unit;

[0013] Dynamically adjust the electrolysis parameters of the flexible electrolyzer unit according to the power fluctuation of the output power, where the electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolyzer unit.

[0014] In some possible embodiments, the electrolysis parameters include the electrode spacing of the flexible electrolyzer unit;

[0015] The adjustable range of the electrode spacing of the flexible electrolyzer unit is set between 1 - 10 cm.

[0016] In some possible embodiments, the control unit is further configured to:

[0017] Predict the output power fluctuation trend of the photovoltaic power generation unit through at least one machine learning algorithm among long short-term memory network, extreme gradient boosting, support vector machine, and random forest;

[0018] Adjust the electrolysis parameters of the flexible electrolyzer unit based on the output power fluctuation trend, where the electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolyzer unit.

[0019] In some possible embodiments, the control unit is further configured to:

[0020] Monitor the output power of the photovoltaic power generation unit and compare the output power with the required power of the flexible electrolyzer unit;

[0021] In the case where the output power is higher than the required power, control the photovoltaic power generation unit to store the surplus electric energy in the energy storage frequency modulation unit, where the surplus electric energy is at least part of the electric energy remaining after meeting the required power;

[0022] In the case where the output power is lower than the required power, control the energy storage frequency modulation unit to discharge to the flexible electrolyzer unit.

[0023] In some possible embodiments, the electrolyte includes a mixed molten salt system, and the mixed molten salt system includes the following components by mass percentage: 20 wt% - 35 wt% NaCl, 34 wt% - 55 wt% CaCl2, 10 wt% - 46 wt% SrCl2.

[0024] In some possible embodiments, the electrolyte further includes at least one of calcium fluoride and sodium fluoride;

[0025] Wherein, the mass ratio of the total mass of calcium fluoride and / or sodium fluoride in the electrolyte to the mass of the mixed molten salt system in the electrolyte is: (0.1 - 1):100.

[0026] In some possible implementation manners, the control unit is further configured to:

[0027] Monitor the electrolytic cell temperature, chlorine concentration of the flexible electrolytic cell unit, and the energy storage overload parameter of the energy storage frequency modulation unit;

[0028] Trigger corresponding safety protection actions when at least one of the electrolytic cell temperature, chlorine concentration, and energy storage overload parameter meets a preset condition.

[0029] In some possible implementation manners, the control unit is further configured to:

[0030] Control the output power of the photovoltaic power generation unit and / or the energy storage frequency modulation unit to perform soft start and slow stop control on the flexible electrolytic cell unit.

[0031] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a control method for an electrolytic preparation system of metallic sodium, which is applied to the electrolytic preparation system of metallic sodium according to any one of the foregoing embodiments of the present application; the control method for the electrolytic preparation system of metallic sodium includes:

[0032] Monitor at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage frequency modulation unit to obtain a monitoring result, and adjust at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage frequency modulation unit based on the monitoring result.

[0033] In a third aspect, an embodiment of the present application provides a control device for an electrolytic preparation system of metallic sodium, and the control device for the electrolytic preparation system of metallic sodium includes:

[0034] A processor and a memory storing computer program instructions;

[0035] When the processor executes the computer program instructions, the control method for the electrolytic preparation system of metallic sodium provided in any one of the foregoing embodiments of the present application is implemented.

[0036] In a fourth aspect, an embodiment of the present application provides a computer storage medium, and computer program instructions are stored on the computer-readable storage medium, and when the computer program instructions are executed by a processor, the control method for the electrolytic preparation system of metallic sodium provided in any one of the foregoing embodiments of the present application is implemented.

[0037] Fifth aspect, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device is caused to execute the control method of the electrolytic preparation system of metallic sodium provided in any one of the above embodiments of the present application.

[0038] As can be seen from the above description, an electrolytic preparation system of metallic sodium and its control method provided by an embodiment of the present application include a photovoltaic power generation unit, a flexible electrolytic cell unit, an energy storage frequency modulation unit, and a control unit. The photovoltaic power generation unit can convert solar energy into direct current electrical energy; the flexible electrolytic cell unit can perform electrolytic preparation of metallic sodium under the power supply of the photovoltaic power generation unit; the energy storage frequency modulation unit is electrically connected to the photovoltaic power generation unit and the flexible electrolytic cell unit respectively. It can not only store energy and charge the energy storage battery in the energy storage frequency modulation unit by the photovoltaic power generation unit, but also supply direct current power to the flexible electrolytic cell unit; the control unit can monitor the operating parameters of the former three and perform timely regulation. An electrolytic preparation system of metallic sodium and its control method according to an embodiment of the present application integrate photovoltaic power generation, energy storage frequency modulation, and dynamic electrolysis regulation. It deeply couples green renewable energy with electrolytic preparation of metallic sodium. The energy storage frequency modulation unit and the control unit can realize the collaborative optimization management of the energy flow and material flow in the system, which can not only achieve clean and efficient production of metallic sodium at low cost, but also reduce energy conversion losses, contribute to the green and sustainable development of the electrolytic sodium industry, and thus promote the large-scale application of renewable energy sodium production and the green and low-carbon development of the electrolytic metal industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0040] Figure 1 is a schematic structural diagram of an electrolytic preparation system of metallic sodium provided by an embodiment of the present application;

[0041] Figure 2 is a schematic flowchart of a control method of an electrolytic preparation system of metallic sodium provided by an embodiment of the present application;

[0042] Figure 3 is a schematic structural diagram of a control device of an electrolytic preparation system of metallic sodium provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The features and exemplary embodiments of various aspects of the present application will be described in detail below. To make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements.

[0045] It should be noted that in the embodiments of the present application, some industry-existing solutions such as certain software, components, models, etc. may be mentioned, and they should be considered as exemplary. The purpose is only to illustrate the feasibility in the implementation of the technical solution of the present application, but it does not mean that the applicant has already or necessarily used this solution.

[0046] As described in the background art section, currently, as an important industrial raw material, the green innovation of the preparation process of metallic sodium is extremely urgent. However, the main metallic sodium preparation in the existing technology has problems such as high electric energy conversion loss and high cost, and cannot meet the clean and efficient production of metallic sodium. In the existing technology, in response to this problem, there are related research attempts to introduce renewable energy into the electrolysis process, but there is an inherent contradiction between the intermittency of renewable energy and the continuous demand of the electrolysis process.

[0047] Specifically, for the coordinated control of photovoltaic and electrolysis, the existing technology mostly adopts an independent control strategy. The photovoltaic system takes the maximum power point tracking as the single target, and the electrolysis system operates at a fixed current density. There is a lack of a dynamic coupling mechanism between the two. This split control results in the ineffective utilization of the excess electric energy during the peak photovoltaic output period, and the electrolyzer is forced to reduce the load when the light is insufficient, resulting in no-load loss of the equipment.

[0048] Based on this, there is still an urgent need in the industry for a green and low-carbon electrolytic preparation solution for metallic sodium to achieve the green and sustainable development of the sodium electrolysis industry, thereby promoting the green and low-carbon development of the electrolytic metal industry.

[0049] In view of the above, to solve the problems of the existing technology, the embodiments of the present application provide an electrolytic preparation system for metallic sodium and its control method. It should be noted that the embodiments provided in the present application are not used to limit the scope of the disclosure of the present application.

[0050] First, the electrolytic preparation system for metallic sodium provided by the embodiments of the present application will be introduced below.

[0051] Figure 1 The structural schematic diagram of the electrolytic preparation system for metallic sodium provided by an embodiment of the present application is shown. As Figure 1 shown, the electrolytic preparation system 100 for metallic sodium includes:

[0052] A photovoltaic power generation unit 10, which is used to convert solar energy into direct current electric energy;

[0053] A flexible electrolytic cell unit 20, which is connected to the output end of the photovoltaic power generation unit 10 and is used to electrolyze the electrolyte under direct current power supply to prepare metallic sodium;

[0054] A energy storage and frequency modulation unit 30, which includes a plurality of energy storage batteries. The energy storage and frequency modulation unit 30 is connected to the output end of the photovoltaic power generation unit 10 and is used to charge under the direct current electric energy output of the photovoltaic power generation unit 10;

[0055] The energy storage and frequency modulation unit 30 is also connected to the flexible electrolytic cell unit 20 and is used to supply power to the flexible electrolytic cell unit 20;

[0056] A control unit 40, which is used to monitor at least one of the photovoltaic power generation unit 10, the flexible electrolytic cell unit 20, and the energy storage and frequency modulation unit 30 to obtain a monitoring result, and based on the monitoring result, regulate at least one of the photovoltaic power generation unit 10, the flexible electrolytic cell unit 20, and the energy storage and frequency modulation unit 30.

[0057] Specifically, the main working principle of the above photovoltaic power generation unit 10 is to convert solar energy into direct current electric energy based on the photovoltaic effect, and can achieve efficient and clean energy conversion. There are various types of photovoltaic power generation units 10, such as distributed photovoltaic power generation units 10, centralized photovoltaic power generation units 10, and portable photovoltaic power generation units 10. The photovoltaic power generation unit 10 in the present application is specifically selected flexibly according to the actual application scenario and requirements.

[0058] More specifically, the above photovoltaic power generation unit 10 may include a photovoltaic module array and a maximum power point tracking (MPPT) controller. The photovoltaic module array is used to convert solar energy into direct current electrical energy for output. The photovoltaic module array can be formed by connecting multiple photovoltaic cells in series or in parallel. Among them, the photovoltaic cell material can be selected from monocrystalline silicon, polycrystalline silicon, amorphous silicon, etc., which is not strictly limited here.

[0059] The above MPPT controller is used to control the photovoltaic module array to maintain maximum power output. The MPPT controller is used to optimize the output power of the photovoltaic module array, directly output direct current to drive the electrolyzer to operate, and avoid the energy conversion loss caused by traditional AC grid connection. When the photovoltaic module array is working, the MPPT controller can detect the output power of the photovoltaic module array in real time, and dynamically adjust the working point of the photovoltaic module array according to different environmental conditions (such as light intensity, temperature, etc.), so that the photovoltaic module array outputs at maximum power, ensuring efficient power generation capacity.

[0060] The above flexible electrolyzer unit 20 may specifically include a molten sodium chloride electrolyzer, a high-temperature resistant anode and a cathode. At high temperatures, the flexible electrolyzer unit 20 electrolyzes to ionize the molten sodium chloride, thereby preparing metallic sodium on the cathode and chlorine gas on the anode. The high-temperature resistant anode and cathode can ensure the stable operation of the electrolyzer at high temperatures. Among them, the flexible electrolyzer unit 20 can adopt a flexible support structure in design, so as to increase the current density of the electrolyzer and thus improve the electrolysis efficiency.

[0061] In the electrolysis preparation system 100 of the present application, the flexible electrolyzer unit 20 is connected to the output end of the photovoltaic power generation unit 10, and the photovoltaic power generation unit 10 can provide electrical energy for the electrolysis reaction of the flexible electrolyzer unit 20. The flexible electrolyzer unit 20 can be used to electrolyze the electrolyte under direct current power supply, so as to efficiently and cleanly prepare metallic sodium.

[0062] The above energy storage frequency modulation unit 30 includes multiple energy storage batteries, such as lithium batteries, lead-acid batteries, etc., which are not limited here. In the present application, in order to improve the energy storage frequency modulation efficiency and reliability, the energy storage battery can specifically be selected as a lithium iron phosphate battery.

[0063] The energy storage frequency modulation unit 30 is connected to the output end of the photovoltaic power generation unit 10, and can be used to store energy and charge under the direct current electrical energy output of the photovoltaic power generation unit 10, so as to store the excess electrical energy of the photovoltaic power generation unit 10, which helps to improve the effective utilization rate of the excess electrical energy during the peak photovoltaic power generation period.

[0064] The energy storage and frequency modulation unit 30 is also connected to the flexible electrolytic cell unit 20 described above for supplying power to the flexible electrolytic cell unit 20. As described above, there is an inherent contradiction between the intermittency of renewable energy and the continuity requirement of the electrolysis process. In this application, the energy storage and frequency modulation unit 30 fully meets the continuity requirement of the flexible electrolytic cell unit 20 for power supply. When the photovoltaic power generation capacity is insufficient to meet the electrolysis demand, by combining the photovoltaic power generation unit 10 and the energy storage and frequency modulation unit 30 to supply power to the flexible electrolytic cell unit 20, the clean and efficient electrolytic preparation of metallic sodium can be fully realized.

[0065] The above control unit 40 can be communicatively connected to the photovoltaic power generation unit 10, the flexible electrolytic cell unit 20, and the energy storage and frequency modulation unit 30 respectively. The communication connection can be, for example, wireless communication, bus communication, etc. The control unit 40 can be used to monitor at least one of the photovoltaic power generation unit 10, the flexible electrolytic cell unit 20, and the energy storage and frequency modulation unit 30 to obtain monitoring results. The monitoring data, such as the real-time output power of the photovoltaic power generation unit 10, the energy storage capacity of the energy storage and frequency modulation unit 30, the currently available electric energy, the required power of the flexible electrolytic cell unit 20, the current temperature of the electrolytic cell, the chlorine concentration, etc., can be specifically set according to the actual monitoring requirements.

[0066] In this way, the control unit 40 can adjust at least one of the photovoltaic power generation unit 10, the flexible electrolytic cell unit 20, and the energy storage and frequency modulation unit 30 based on the monitoring results of the above components. The adjustment means, such as adjusting the magnitude of the output power provided by the photovoltaic power generation unit 10 to the flexible electrolytic cell unit 20, etc., can be specifically set according to the actual system application requirements.

[0067] In actual design, the control unit 40 can be implemented by a host computer or a terminal device, or can also be implemented by a processor such as a microcontroller unit (MCU), a field-programmable gate array (FPGA), etc. to realize the functions of the control unit 40.

[0068] It should be added that, as Figure 1 shown, after the above photovoltaic power generation unit 10 converts solar energy into direct current electric energy, it can transmit the direct current electric energy to the direct current bus, and then the direct current bus outputs the electric energy to each load. The load can be, for example, the flexible electrolytic cell unit 20, or can also be, for example, the energy storage and frequency modulation unit 30 in a charging state.

[0069] When the above energy storage frequency modulation unit 30 needs to supply power to the flexible electrolytic cell unit 20, it can also transmit DC electrical energy to the DC bus, and the DC bus transports the electrical energy to the flexible electrolytic cell unit 20, so as to realize the orderly distribution of DC electrical energy and stable power supply, meet the electrical energy requirements of various loads, and at the same time can effectively improve the transmission and utilization efficiency of energy.

[0070] In addition, when the above flexible electrolytic cell unit 20 needs external power supply for electrolysis, the external DC electrical energy can also be distributed to the anode and cathode of the flexible electrolytic cell unit 20 through the corresponding electrolysis bus, so as to realize the reliable electrolysis of the electrolyte. By adopting the above electrolysis bus structure, the production efficiency of metallic sodium can be effectively improved and the electrolysis stability can be improved, ensuring the stable operation of the electrolytic cell.

[0071] As can be seen from the above description, an electrolytic preparation system 100 for metallic sodium provided by an embodiment of the present application includes a photovoltaic power generation unit 10, a flexible electrolytic cell unit 20, an energy storage frequency modulation unit 30, and a control unit 40. The photovoltaic power generation unit 10 can convert solar energy into DC electrical energy; the flexible electrolytic cell unit 20 can carry out the electrolytic preparation of metallic sodium under the power supply of the photovoltaic power generation unit 10; the energy storage frequency modulation unit 30 is electrically connected to the photovoltaic power generation unit 10 and the flexible electrolytic cell unit 20 respectively. The energy storage battery in the energy storage frequency modulation unit 30 can be charged by the photovoltaic power generation unit 10, or DC power can be supplied to the flexible electrolytic cell unit 20; the control unit 40 can monitor the operating parameters of the first three and make timely adjustments.

[0072] An electrolytic preparation system 100 for metallic sodium according to an embodiment of the present application integrates photovoltaic power generation, energy storage frequency modulation, and dynamic electrolysis control. It deeply couples green renewable energy with the electrolytic preparation of metallic sodium. The energy storage frequency modulation unit 30 and the control unit 40 can realize the collaborative optimization management of the energy flow and material flow in the system, not only can realize the clean and efficient production of metallic sodium at low cost, but also can reduce the energy conversion loss, contribute to the green and sustainable development of the electrolytic sodium industry, and thus can promote the large-scale application of renewable energy sodium production and the green and low-carbon development of the electrolytic metal industry.

[0073] According to some embodiments of the present application, optionally, the control unit 40 is used for:

[0074] monitor the output power of the photovoltaic power generation unit 10;

[0075] dynamically adjust the electrolysis parameters of the flexible electrolytic cell unit 20 according to the power fluctuation of the output power, and the electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolytic cell unit 20.

[0076] In specific implementation, data monitoring can be achieved by pre-setting corresponding sensors in the photovoltaic power generation unit 10. The data monitoring can be real-time monitoring or monitoring at a preset interval.

[0077] For example, a DC voltage sensor and a DC current sensor are installed in the output circuit of the photovoltaic power generation unit 10. During actual monitoring, at a preset interval, for example, every 5 ms, the output power of the photovoltaic power generation unit 10 can be obtained based on the DC voltage and current data collected by the sensors.

[0078] In this way, the control unit 40 can analyze and determine the power fluctuation situation of the output power according to the collected output power of the photovoltaic power generation unit 10. When the power fluctuation situation of the output power meets the adjustment condition of the electrolysis parameters, the control unit 40 can dynamically adjust the electrolysis parameters of the flexible electrolysis cell unit 20 by sending control instructions to adapt to the power fluctuation of the photovoltaic power generation unit 10, thereby effectively improving the operation efficiency and stability of the electrolysis preparation system 100.

[0079] As an example, when the output power of the photovoltaic power generation unit 10 increases, the control unit 40 can appropriately control and increase the electrolysis temperature of the electrolysis cell to improve the electrolysis preparation efficiency of sodium metal. When the output power decreases, the electrolysis temperature can be appropriately reduced to slow down the chemical reaction rate, thereby reducing power consumption.

[0080] According to some embodiments of the present application, optionally, the electrolysis parameters include the electrode spacing of the flexible electrolysis cell unit 20;

[0081] The adjustable range of the electrode spacing of the flexible electrolysis cell unit 20 is set between 1 - 10 cm.

[0082] In this embodiment, considering that the structural design of the flexible electrolysis cell unit 20 needs to balance high-temperature stability and dynamic adjustment ability, when adjusting the electrolysis parameters, the adjustable range of the electrode spacing of the flexible electrolysis cell unit 20 can be set between 1 - 10 cm, so as to ensure the reliability and stability of the operation of the electrolysis cell. Among them, the electrode spacing can be understood as the pole spacing between the anode and the cathode in the flexible electrolysis cell unit 20.

[0083] Furthermore, the preferred adjustment range of the electrode spacing of the flexible electrolysis cell unit 20 is set between 2 - 5 cm. As an example, when it is monitored that the output power of the photovoltaic power generation unit 10 decreases, the control unit 40 gradually contracts the electrode spacing from the reference 5 cm to 3 cm to reduce the cell voltage. In this way, it can support the flexible electrolysis cell unit 20 to match a better current density under different light intensities, thereby achieving the effect of reducing electrolysis energy consumption.

[0084] According to some embodiments of the present application, optionally, the control unit 40 is further configured to:

[0085] Predict the output power fluctuation trend of the photovoltaic power generation unit 10 by at least one machine learning algorithm among long short-term memory network, extreme gradient boosting, support vector machine, and random forest;

[0086] Based on the output power fluctuation trend, adjust the electrolysis parameters of the flexible electrolysis cell unit 20, and the electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolysis cell unit 20.

[0087] In this embodiment, in addition to monitoring the real-time photovoltaic output power as in the previous embodiment, the control unit 40 can also predict the output power fluctuation trend of the photovoltaic power generation unit 10 in advance, so as to adjust the electrolysis parameters according to the prediction information in advance.

[0088] Specifically, when predicting the output power fluctuation trend of the photovoltaic power generation unit 10, first collect the historical data of the photovoltaic power generation unit 10 in the early stage, including environmental parameters such as output power, light intensity, temperature, and humidity. The historical data can be, for example, the data collected in the previous month or the previous week. After the historical data collection is completed, data preprocessing operations such as data cleaning and anomaly removal can be performed on the data.

[0089] Then, based on the empirical data obtained by preprocessing, the control unit 40 can fully combine at least one machine learning algorithm among long short-term memory network (LSTM), extreme gradient boosting (XGBoost), support vector machine (SVM), and random forest (RF) for model training. The trained model can be used to predict the output power fluctuation trend of the photovoltaic power generation unit 10 in the future time period.

[0090] In this way, during the actual system operation stage, the photovoltaic power fluctuation trend can be predicted 60 minutes in advance according to the above-trained model. For example, at 2 pm, the photovoltaic output power at 3 pm can be predicted, so as to adjust the electrolysis parameters in time according to the prediction results.

[0091] In this embodiment, the control unit 40 realizes the prediction of the output power fluctuation trend of the photovoltaic power generation unit 10 by fully combining the above machine learning algorithms, which can improve the prediction performance, thereby improving the reliability of the electrolysis parameter adjustment, and ensuring that the electrolysis preparation system 100 can operate reliably and stably under the regulation of the control unit 40.

[0092] In some scenarios, the method of adjusting electrolysis parameters by real-time monitoring and the method of adjusting electrolysis parameters by predicting in advance provided in the above embodiments can be combined, so as to more fully achieve system regulation. Among them, in order to fully improve the reliability and accuracy of electrolysis parameter regulation, when adjusting electrolysis parameters by predicting in advance, "coarse adjustment" can be performed on the electrolysis parameters; when adjusting electrolysis parameters by real-time monitoring, "fine adjustment" can be performed on the electrolysis parameters. That is to say, by controlling the different granularities of electrolysis parameter adjustment under different adjustment strategies, it can more fully adapt to the power fluctuations of the photovoltaic power generation unit 10, thereby more effectively improving the operation efficiency and stability of the electrolysis preparation system 100.

[0093] According to some embodiments of the present application, optionally, the control unit 40 is further configured to:

[0094] Monitor the output power of the photovoltaic power generation unit 10 and compare the output power with the required power of the flexible electrolytic cell unit 20;

[0095] In the case where the output power is higher than the required power, control the photovoltaic power generation unit 10 to store the remaining electric energy in the energy storage frequency modulation unit 30, and the remaining electric energy is at least part of the electric energy remaining after meeting the required power;

[0096] In the case where the output power is lower than the required power, control the energy storage frequency modulation unit 30 to discharge to the flexible electrolytic cell unit 20.

[0097] Specifically, due to the change of the working environmental conditions of the photovoltaic power generation unit 10, the output power of the photovoltaic power generation unit 10 often has peaks and valleys. For example, power peaks appear during the day with sufficient sunlight, and valleys appear at night or on cloudy days. When electrolytically preparing metallic sodium based on photovoltaic green electricity, it is necessary to ensure the stability of the total amount of DC electric energy provided to the flexible electrolytic cell unit 20 and hope to improve the power utilization efficiency of the system.

[0098] Therefore, in this embodiment, by installing a DC voltage sensor and a DC current sensor in the output circuit of the photovoltaic power generation unit 10, for example, to monitor the output power of the photovoltaic power generation unit 10 and compare the magnitudes of the output power and the required power of the flexible electrolytic cell unit 20, so as to dynamically adjust the charge and discharge strategies of the energy storage frequency modulation unit 30. Among them, the required power of the flexible electrolytic cell unit 20 can be determined based on the working voltage and current requirements of the flexible electrolytic cell unit 20.

[0099] When the control unit 40 detects that the output power of the photovoltaic power generation unit 10 is higher than the required power of the flexible electrolytic cell unit 20, the control unit controls the photovoltaic power generation unit 10 to store the surplus electric energy in the energy storage frequency modulation unit 30. The surplus electric energy is at least part of the electric energy remaining after meeting the required power, so that the effective utilization rate of the surplus electric energy during the peak period of photovoltaic power generation can be fully improved.

[0100] When the control unit 40 detects that the output power of the photovoltaic power generation unit 10 is lower than the required power of the flexible electrolytic cell unit 20, the control unit controls the energy storage frequency modulation unit 30 to discharge to the flexible electrolytic cell unit 20, so that the energy storage unit releases electric energy to supplement the demand gap of the flexible electrolytic cell unit 20.

[0101] In this way, the energy storage frequency modulation unit 30 fully meets the continuous demand of the flexible electrolytic cell unit 20 for electric energy supply. When the photovoltaic production capacity is insufficient to meet the electrolysis demand, by combining the photovoltaic power generation unit 10 and the energy storage frequency modulation unit 30 to supply power to the flexible electrolytic cell unit 20, the clean and efficient electrolytic preparation of metallic sodium can be fully realized.

[0102] It should be added that the above energy storage frequency modulation unit 30 can also be connected to the photovoltaic power generation unit 10 through a bidirectional DC converter, and connected to the flexible electrolytic cell unit 20 through another bidirectional DC converter, so as to realize the conversion and matching of DC electric energy between the energy storage frequency modulation unit 30 and the photovoltaic power generation unit 10, and between the energy storage frequency modulation unit 30 and the flexible electrolytic cell unit 20. At the same time, it is also beneficial to power regulation and optimization and the smoothing of power fluctuations.

[0103] In this way, when the environmental conditions change, such as light fluctuations, the energy storage frequency modulation unit 30 can better play the role of peak shaving and valley filling, and finally realize the continuous and stable operation of the electrolysis process in the flexible electrolytic cell unit 20.

[0104] According to some embodiments of the present application, optionally, the electrolyte includes a mixed molten salt system. The mixed molten salt system includes the following components by mass percentage: 20wt%–35wt% NaCl, 34wt%–55wt% CaCl2, 10wt%–46wt% SrCl2.

[0105] Specifically, the inventors of the present application have found through research that at the level of material system innovation, when preparing metallic sodium, the traditional molten salt electrolyte is mainly a binary system of NaCl–CaCl2, and its primary crystallization temperature is relatively high. It is necessary to maintain the electrolysis temperature above 620°C for a long time, resulting in an increased rate of electrode corrosion. Although there have been studies attempting to add additives such as BaCl2 to reduce the melting point, the introduced barium ions are likely to form a passivation layer on the cathode surface, resulting in a decrease in current efficiency.

[0106] Based on this, this embodiment proposes a new molten salt mixture system for preparing sodium metal. The molten salt mixture system includes 20wt% - 35wt% NaCl, 34wt% - 55wt% CaCl2, and 10wt% - 46wt% SrCl2. Compared with the electrolysis preparation strategy in the related art, the electrolysis preparation of sodium metal based on the electrolyte including this molten salt mixture system in this embodiment can effectively improve the electrolysis efficiency and reduce the thermal energy consumption.

[0107] In some more specific embodiments, in order to further improve the electrolysis efficiency, in the above-mentioned molten salt mixture system, NaCl (25wt% - 30wt%), CaCl2 (45wt% - 50wt%), and SrCl2 (20wt% - 30wt%) are selected by mass percentage.

[0108] According to some embodiments of the present application, optionally, the electrolyte further includes at least one of calcium fluoride and sodium fluoride;

[0109] Wherein, the mass ratio of the total mass of calcium fluoride and / or sodium fluoride in the electrolyte to the mass of the molten salt mixture system in the electrolyte is: (0.1 - 1):100.

[0110] In this embodiment, on the basis that the electrolyte includes the aforementioned molten salt mixture system, any one or both of calcium fluoride and sodium fluoride are added simultaneously, and the total addition ratio of calcium fluoride and sodium fluoride is 0.1wt% - 1wt% of the molten salt mixture system. In this way, the melting point of the molten salt can be effectively reduced, the heating energy consumption can be reduced, and the ionic conductivity can be improved. Finally, the electrolysis efficiency of the flexible electrolysis cell unit 20 can be fully improved.

[0111] Furthermore, the mass ratio of the total mass of calcium fluoride and / or sodium fluoride in the electrolyte to the mass of the molten salt mixture system in the electrolyte is: (0.5 - 1):100. In this way, by limiting the total addition ratio of calcium fluoride and sodium fluoride to 0.5wt% - 1wt% of the molten salt mixture system, a better electrolysis effect can be achieved.

[0112] According to some embodiments of the present application, optionally, the control unit 40 is further configured to:

[0113] Monitor the electrolysis cell temperature of the flexible electrolysis cell unit 20, the chlorine concentration, and the energy storage overload parameter of the energy storage frequency modulation unit 30;

[0114] Trigger the corresponding safety protection action when at least one of the electrolysis cell temperature, the chlorine concentration, and the energy storage overload parameter meets the preset condition.

[0115] In this embodiment, the control unit 40 also provides a safety protection function for the electrolysis preparation system 100. Specifically, as an example, a temperature sensor is set in the system to collect the temperature of the electrolytic cell, and the chlorine concentration in the electrolytic cell is measured by, for example, an electro-chemical chlorine sensor. The detection of energy storage overload parameters of the energy storage battery in the energy storage frequency modulation unit 30 is realized according to the Battery Management System (BMS), etc. The energy storage overload parameters are at least one of, for example, the state of health of the battery, available power, etc., and can be specifically set according to actual safety protection requirements.

[0116] In this way, the control unit 40 obtains the electrolytic cell temperature, chlorine concentration of the electrolytic cell unit, and energy storage overload parameters of the energy storage frequency modulation unit 30 through the above sensors, etc. When at least one of the electrolytic cell temperature, chlorine concentration, and energy storage overload parameters meets the preset conditions, the corresponding safety protection action is triggered, so as to fully realize the safe and reliable operation of the electrolysis preparation system 100.

[0117] For example, when it is detected that the chlorine concentration exceeds 50 ppm or the temperature exceeds 610 °C, the control unit 40 triggers an emergency shutdown procedure and switches the power supply from the photovoltaic power generation unit 10 to the energy storage frequency modulation unit 30 to supply power to the flexible electrolytic cell unit 20 to maintain the heat preservation state of the electrolytic cell.

[0118] For another example, when it is detected that there are problems such as a poor state of health of the battery or undercharge in the energy storage frequency modulation unit 30, the corresponding energy storage battery in the energy storage frequency modulation unit 30 is cut out, and a spare battery is cut in to maintain the normal operation of the energy storage frequency modulation unit 30.

[0119] According to some embodiments of the present application, optionally, the control unit 40 is further configured to:

[0120] Control the output power of the photovoltaic power generation unit 10 and / or the energy storage frequency modulation unit 30 to perform soft start and slow stop control on the flexible electrolytic cell unit 20.

[0121] In this embodiment, exemplarily, when the flexible electrolytic cell unit 20 starts or stops, by controlling the output power of the photovoltaic power generation unit 10 and / or the energy storage frequency modulation unit 30 to the flexible electrolytic cell unit 20 to be gradually increased or decreased, the current supplied to the flexible electrolytic cell unit 20 is gradually increased or decreased, so as to effectively realize the soft start and slow stop control of the flexible electrolytic cell unit 20, avoid damage to the electrodes in the flexible electrolytic cell unit 20 caused by sudden current changes, and further improve the stability and reliability of the system.

[0122] As can be seen from the foregoing embodiments, the electrolytic preparation system 100 for metallic sodium in the present application is based on photovoltaic green electricity and consists of four parts: a photovoltaic power generation unit 10, a flexible electrolytic cell unit 20, an energy storage and frequency modulation unit 30, and a control unit 40. The purpose of this solution is to achieve clean and efficient production of metallic sodium through deep coupling of renewable energy and electrolysis technology. The electrolytic preparation system 100 takes a photovoltaic DC microgrid as the core, combines the adjustment of electrolytic cell electrolysis parameters, an energy storage unit, and intelligent control technology to optimize the coordinated management of energy flow and material flow, so as to reduce the dependence on the power grid and carbon emissions in the traditional sodium electrolysis process.

[0123] To facilitate the understanding of the electrolytic preparation system 100 for metallic sodium provided in the above embodiments, the following uses two specific scenario embodiments to illustrate the operation process of the above system.

[0124] First, please refer to Embodiment 1:

[0125] In this embodiment, the photovoltaic power generation unit 10 is composed of a polycrystalline silicon photovoltaic module array, and converts unstable solar energy into direct current suitable for electrolysis requirements through a maximum power point tracking controller. The output end of the photovoltaic power generation unit 10 is connected to the energy storage and frequency modulation unit 30 and the flexible electrolytic cell unit 20 respectively through a DC bus.

[0126] The flexible electrolytic cell unit 20 adopts a structural design with dynamically adjustable electrode spacing, and adjusts the electrode spacing through a control system. The electrolyte for preparing metallic sodium is composed of 30wt% NaCl, 45wt% CaCl2, and 25wt% SrCl2, and 0.5wt% calcium fluoride is added as a flux. The working temperature of the electrolytic cell is controlled at 580 ± 10°C.

[0127] The energy storage and frequency modulation unit 30 is configured with multiple groups of lithium iron phosphate battery packs to achieve bidirectional power flow through a bidirectional DC converter. When the output power of the photovoltaic power generation unit 10 exceeds the required power of the flexible electrolytic cell unit 20, the excess electric energy is stored in the battery packs in the energy storage and frequency modulation unit 30; when the output power of the photovoltaic power generation unit 10 is lower than the required power of the flexible electrolytic cell unit 20 under insufficient light conditions, the energy storage and frequency modulation unit 30 supplies power to the flexible electrolytic cell unit 20.

[0128] The control unit 40 integrates a prediction model constructed by an LSTM neural network and an XGBoost algorithm to predict the photovoltaic power fluctuation trend 60 minutes in advance. When it is predicted that the output power of the photovoltaic power generation unit 10 decreases due to the decrease in light intensity, the control unit 40 gradually contracts the electrode spacing of the flexible electrolytic cell unit 20 from the reference 5 cm to 3 cm to reduce the cell voltage, and at the same time raises the electrolysis temperature to 590 °C to maintain the reaction activity. Moreover, the control unit 40 can also monitor the chlorine concentration and the electrolytic cell temperature in real time. When the detected chlorine concentration exceeds 50 ppm or the temperature exceeds 610 °C, an emergency shutdown procedure is triggered, and the power supply is switched to the energy storage frequency modulation unit 30 to supply power to the flexible electrolytic cell unit 20 to maintain the heat preservation state of the electrolytic cell. The control unit 40 can also, when detecting problems such as poor battery health state or undercharge in the energy storage frequency modulation unit 30, cut out the corresponding energy storage battery in the energy storage frequency modulation unit 30 and cut in the standby battery to maintain the normal operation of the energy storage frequency modulation unit 30.

[0129] Next, please refer to Embodiment 2:

[0130] In this embodiment, the operation process of the electrolytic preparation system 100 of metallic sodium under typical sunny day conditions is described. The photovoltaic power generation unit 10 uses a monocrystalline silicon module array with a peak power of 600 kW. The MPPT controller adjusts the operating point according to the real-time irradiance to make the output power fluctuate stably near the rated power of the electrolytic cell, which is 500 kW.

[0131] The electrolyte of the flexible electrolytic cell unit 20 adopts a system of 30 wt% NaCl, 45 wt% CaCl2, and 25 wt% SrCl2, and 0.5 wt% sodium fluoride of the total electrolyte is added.

[0132] During the experiment, the control unit 40 collects the temperatures of each area of the electrolytic cell in real time through distributed temperature sensors, and the operating temperature is controlled at 580 ± 10 °C. The control unit 40 integrates a prediction model constructed by a random forest algorithm to predict the photovoltaic power fluctuation trend of the photovoltaic power generation unit 10 30 minutes in advance. When it is predicted that the irradiance will decrease by 20% resulting in a decrease in the photovoltaic output power, the electrolytic cell is controlled in advance to adjust the electrode spacing from 8 cm to 5 cm, and at the same time, the energy storage frequency modulation unit 30 composed of lithium iron phosphate batteries is started to discharge to the flexible electrolytic cell unit 20 at a power of 100 kW to make up for the power gap.

[0133] The control module can monitor the chlorine concentration and the electrolyzer temperature in real time. When the detected chlorine concentration exceeds 50 ppm or the temperature exceeds 620 °C, it triggers an emergency shutdown procedure and switches to the energy storage frequency modulation unit 30 to maintain the heat preservation state of the electrolyzer. The control unit 40 can also, when detecting problems such as a poor battery health state or undercharging in the energy storage frequency modulation unit 30, cut out the corresponding energy storage battery in the energy storage frequency modulation unit 30 and switch in the standby battery to maintain the normal operation of the energy storage frequency modulation unit 30.

[0134] The experimental results of this embodiment show that the electrolytic preparation system 100 of metallic sodium still maintains a high current efficiency during light fluctuations, and the comprehensive power consumption is reduced by 35% compared with the power supply mode of the power grid.

[0135] Overall, the electrolytic preparation system 100 of metallic sodium in this application integrates the coordinated control technologies of direct green power supply, dynamically adjustable electrolyzers, and intelligent energy storage, reducing the power consumption of metallic sodium preparation compared with traditional processes. The electrolytic preparation system 100 of metallic sodium adopts a modular design and can be flexibly deployed in photovoltaic-rich areas according to light resources, thus promoting the large-scale application of sodium production from renewable energy. In addition, the dynamically adjustable electrolyzer and hybrid energy storage technologies provided in this application also provide a technical path for the green power transformation of other high-energy-consuming metallurgical processes (such as aluminum and magnesium electrolysis), with significant industrial demonstration value.

[0136] Based on the electrolytic preparation system of metallic sodium provided in the foregoing embodiment, correspondingly, based on the same inventive concept, the embodiment of this application provides a control method for an electrolytic preparation system of metallic sodium, which is applied to the electrolytic preparation system of metallic sodium in any one of the foregoing embodiments of this application. The control method for the electrolytic preparation system of metallic sodium can be specifically implemented by the control unit described in the foregoing embodiment.

[0137] Please refer to the following Figure 2 , Figure 2 which is a schematic flowchart of the control method for an electrolytic preparation system of metallic sodium provided in an embodiment of this application. As Figure 2 shown, the control method for the electrolytic preparation system of metallic sodium includes the following steps:

[0138] S201, monitor at least one of the photovoltaic power generation unit, the flexible electrolyzer unit, and the energy storage frequency modulation unit to obtain a monitoring result, and based on the monitoring result, adjust at least one of the photovoltaic power generation unit, the flexible electrolyzer unit, and the energy storage frequency modulation unit.

[0139] As can be seen from the above description, a control method for an electrolytic preparation system of sodium metal provided by an embodiment of the present application. The electrolytic preparation system of sodium metal includes a photovoltaic power generation unit, a flexible electrolytic cell unit, an energy storage frequency modulation unit, and a control unit. The control method monitors at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage frequency modulation unit to obtain a monitoring result, and based on the monitoring result, adjusts at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage frequency modulation unit.

[0140] By integrating photovoltaic power generation, energy storage frequency modulation, and dynamic electrolysis control, it deeply couples green renewable energy with the electrolytic preparation of sodium metal. The energy storage frequency modulation unit and the control unit can realize the collaborative optimization management of the energy flow and material flow in the system, not only enabling the clean and efficient production of sodium metal at low cost, but also reducing energy conversion losses, contributing to the green and sustainable development of the sodium electrolysis industry, thus promoting the large-scale application of renewable energy-based sodium production and the green and low-carbon development of the electrolytic metal industry.

[0141] According to some embodiments of the present application, optionally, the control method for the electrolytic preparation system of sodium metal includes:

[0142] Monitor the output power of the photovoltaic power generation unit;

[0143] According to the power fluctuation condition of the output power, dynamically adjust the electrolysis parameters of the flexible electrolytic cell unit. The electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolytic cell unit.

[0144] According to some embodiments of the present application, optionally, the control method for the electrolytic preparation system of sodium metal includes:

[0145] Predict the output power fluctuation trend of the photovoltaic power generation unit through at least one machine learning algorithm among long short-term memory network, extreme gradient boosting, support vector machine, and random forest;

[0146] Based on the output power fluctuation trend, adjust the electrolysis parameters of the flexible electrolytic cell unit. The electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolytic cell unit.

[0147] According to some embodiments of the present application, optionally, the control method for the electrolytic preparation system of sodium metal includes:

[0148] Monitor the output power of the photovoltaic power generation unit and compare the output power with the required power of the flexible electrolytic cell unit;

[0149] In the case where the output power is higher than the required power, control the photovoltaic power generation unit to store the remaining electric energy in the energy storage frequency modulation unit. The remaining electric energy is the electric energy remaining after meeting the required power;

[0150] When the output power is lower than the required power, control the energy storage frequency modulation unit to discharge the flexible electrolytic cell unit.

[0151] According to some embodiments of the present application, optionally, the control method of the electrolytic preparation system of metallic sodium further includes:

[0152] Monitor the electrolytic cell temperature, chlorine concentration of the flexible electrolytic cell unit, and the energy storage overload parameter of the energy storage frequency modulation unit;

[0153] When at least one of the electrolytic cell temperature, chlorine concentration, and energy storage overload parameter satisfies a preset condition, trigger a corresponding safety protection action.

[0154] According to some embodiments of the present application, optionally, the control method of the electrolytic preparation system of metallic sodium further includes:

[0155] Control the output power of the photovoltaic power generation unit and / or the energy storage frequency modulation unit to perform soft start and slow stop control on the flexible electrolytic cell unit.

[0156] It should be understood that the control method of the electrolytic preparation system of metallic sodium provided by the embodiments of the present application has the beneficial effects of the electrolytic preparation system of metallic sodium provided by the embodiments of the present application. The specific implementation manner can refer to the specific description of the electrolytic preparation system of metallic sodium in the above embodiments. For the sake of brevity, it will not be repeated here.

[0157] Based on the control method of the electrolytic preparation system of metallic sodium provided by the above embodiments, for the same inventive concept, the present application also provides a control device of an electrolytic preparation system of metallic sodium corresponding to the above control method of the electrolytic preparation system of metallic sodium. Below, Figure 3 A detailed introduction to the control device of the electrolytic preparation system of metallic sodium will be given.

[0158] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a control device of an electrolytic preparation system of metallic sodium provided by an embodiment of the present application.

[0159] The control device of the electrolytic preparation system of metallic sodium may include a processor 301 and a memory 302 storing computer program instructions.

[0160] Specifically, the above processor 301 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0161] The memory 302 may include a mass storage for data or instructions. By way of example and not limitation, the memory 302 may include a hard disk drive (HDD), a floppy disk drive, flash memory, an optical disc, a magneto-optical disc, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 302 may include removable or non-removable (or fixed) media. Where appropriate, the memory 302 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, the memory 302 is a non-volatile solid-state memory.

[0162] The memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0163] The processor 301 reads and executes the computer program instructions stored in the memory 302 to implement the control method of the electrolytic preparation system of metallic sodium in any of the above embodiments.

[0164] In one example, the control device of the electrolytic preparation system of metallic sodium may further include a communication interface 303 and a bus 310. Among them, as Figure 3 shown, the processor 301, the memory 302, and the communication interface 303 are connected through the bus 310 and complete communication with each other.

[0165] The communication interface 303 is mainly used to implement communication between various modules, devices, units, and / or devices in the embodiments of the present application.

[0166] The bus 310 includes hardware, software, or both, and couples components of the control device of the electrolytic preparation system of metallic sodium together. By way of example and not limitation, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses or a combination of two or more of these. Where appropriate, the bus 310 may include one or more buses. Although embodiments of the present application describe and illustrate specific buses, the present application contemplates any suitable bus or interconnect.

[0167] The control device of the electrolytic preparation system of metallic sodium executes the control method of the electrolytic preparation system of metallic sodium in the embodiments of the present application, thereby implementing the control method of the electrolytic preparation system of metallic sodium described in the embodiments of the present application.

[0168] In addition, in combination with the control method of the electrolytic preparation system of metallic sodium in the above embodiments, embodiments of the present application may be implemented by providing a computer storage medium. Computer program instructions are stored on the computer storage medium; when the computer program instructions are executed by a processor, any one of the control methods of the electrolytic preparation system of metallic sodium in the above embodiments is implemented.

[0169] Based on the control method of the electrolytic preparation system of metallic sodium in the above embodiments, embodiments of the present application provide a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device is caused to execute the control method of the electrolytic preparation system of metallic sodium provided in any one of the above embodiments of the present application.

[0170] It should be clear that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present application.

[0171] The functional blocks shown in the above-described structural block diagrams can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, and so on. When implemented in software, the elements of the present application are programs or code segments for performing the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave over a transmission medium or a communication link. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical discs, hard disks, fiber optic media, radio frequency (RF) links, and so on. The code segment can be downloaded via a computer network such as the Internet, an intranet, and so on.

[0172] It should also be noted that the exemplary embodiments mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps can be executed in the order mentioned in the embodiments, can be different from the order in the embodiments, or several steps can be executed simultaneously.

[0173] Aspects of the present disclosure have been described above with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block in the flowcharts and / or block diagrams, and the combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more blocks of the flowcharts and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It should also be understood that each block in the block diagrams and / or flowcharts, and the combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0174] As described above, this is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. An electrolytic preparation system for metallic sodium, characterized in that, The electrolysis preparation system includes: a photovoltaic power generation unit for converting solar energy into direct current electrical energy; a flexible electrolytic cell unit connected to the output end of the photovoltaic power generation unit for electrolyzing an electrolyte under direct current power supply to prepare metallic sodium; a energy storage and frequency modulation unit including a plurality of energy storage batteries, the energy storage and frequency modulation unit being connected to the output end of the photovoltaic power generation unit for charging under the direct current electrical energy output of the photovoltaic power generation unit; the energy storage and frequency modulation unit is also connected to the flexible electrolytic cell unit for supplying power to the flexible electrolytic cell unit; a control unit for monitoring at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage and frequency modulation unit to obtain a monitoring result, and regulating at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage and frequency modulation unit based on the monitoring result.

2. The electrolytic preparation system according to claim 1, wherein The control unit is used for: monitoring the output power of the photovoltaic power generation unit; dynamically adjusting the electrolysis parameters of the flexible electrolytic cell unit according to the power fluctuation condition of the output power, where the electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolytic cell unit.

3. The electrolytic preparation system according to claim 2, wherein, The electrolysis parameters include the electrode spacing of the flexible electrolytic cell unit; The adjustable range of the electrode spacing of the flexible electrolytic cell unit is set between 1 - 10 cm.

4. The electrolytic preparation system according to claim 1, characterized in that, The control unit is also used for: predicting the output power fluctuation trend of the photovoltaic power generation unit through at least one machine learning algorithm among long short-term memory network, extreme gradient boosting, support vector machine, and random forest; adjusting the electrolysis parameters of the flexible electrolytic cell unit based on the output power fluctuation trend, where the electrolysis parameters include at least one of the electrode spacing, current density, and electrolysis temperature of the flexible electrolytic cell unit.

5. The electrolytic preparation system according to claim 1, characterized in that, The control unit is also used for: monitoring the output power of the photovoltaic power generation unit and comparing the output power with the required power of the flexible electrolytic cell unit; when the output power is higher than the required power, controlling the photovoltaic power generation unit to store the remaining electrical energy in the energy storage and frequency modulation unit, where the remaining electrical energy is at least part of the electrical energy remaining after meeting the required power; when the output power is lower than the required power, controlling the energy storage and frequency modulation unit to discharge to the flexible electrolytic cell unit.

6. The electrolytic preparation system according to claim 1, characterized in that, The electrolyte includes a mixed molten salt system; The mixed molten salt system includes the following components by mass percentage: 20wt% - 35wt% NaCl, 34wt% - 55wt% CaCl2, 10wt% - 46wt% SrCl2.

7. The electrolytic preparation system according to claim 6, wherein The electrolyte also includes at least one of calcium fluoride and sodium fluoride; wherein, the mass ratio of the total mass of the calcium fluoride and / or the sodium fluoride in the electrolyte to the mass of the mixed molten salt system in the electrolyte is: (0.1 - 1):

100.

8. The electrolytic preparation system according to claim 1, characterized in that, The control unit is also used for: monitoring the electrolytic cell temperature, chlorine concentration of the flexible electrolytic cell unit, and the energy storage overload parameter of the energy storage and frequency modulation unit; When at least one of the electrolytic cell temperature, chlorine gas concentration, and the energy storage overload parameter satisfies a preset condition, a corresponding safety protection action is triggered.

9. The electrolytic preparation system according to claim 1, wherein The control unit is further configured to: Control the output power of the photovoltaic power generation unit and / or the energy storage frequency modulation unit to perform soft start and slow stop control on the flexible electrolytic cell unit.

10. A control method for an electrolytic preparation system of sodium metal, characterized in that, Applied to the electrolytic preparation system of metallic sodium according to any one of claims 1-9; the control method includes: Monitor at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage frequency modulation unit to obtain a monitoring result, and based on the monitoring result, adjust at least one of the photovoltaic power generation unit, the flexible electrolytic cell unit, and the energy storage frequency modulation unit.

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