Shutdown method, device and equipment for electrolytic cell, storage medium and program product

Abstract

The invention provides a shutdown method, device and equipment for an electrolytic cell, a storage medium and a program product. Relates to the technical field of electrolytic hydrogen production. The method comprises the following steps: determining target pressure of separation devices connected with a plurality of electrolytic cells and hydrogen generation rates of the plurality of electrolytic cells, wherein the separation devices comprise an oxygen separation device and a hydrogen separation device; determining a first total amount of inert gas to be injected according to the hydrogen generation rate; controlling the gas release of the oxygen separation device and the hydrogen separation device according to the target pressure and the injection pressure corresponding to the inert gas; when the current pressure of the separation device reaches the injection pressure, the multiple electrolytic cells are controlled to be shut down; and according to the first total amount, inert gas is injected into the oxygen separation device and the hydrogen separation device, and the shutdown safety of the electrolytic cell is improved.

Description

Technical Field

[0001] This application relates to the field of electrolytic hydrogen production technology, and in particular to a method, apparatus, equipment, storage medium, and program product for shutting down an electrolyzer. Background Technology

[0002] In large-scale industrial hydrogen production scenarios, multiple alkaline electrolyzers are typically operated in parallel, with hydrogen and oxygen being centrally processed by a single gas separation device. To ensure that the hydrogen content on the oxygen side of the electrolyzer is within the normal range, each electrolyzer needs to be safely shut down.

[0003] In related technologies, the shutdown process is usually carried out by directly cutting off the power supply, and the residual gas in the electrolytic cell and separation device is discharged by gas-liquid separation and displacement operations.

[0004] However, during the above process, the pressure inside the electrolyzer after direct shutdown may fluctuate significantly, making it difficult to remove residual gas in time. This can cause the hydrogen content on the oxygen side of the electrolyzer to exceed the normal range, resulting in low safety during the shutdown of the electrolyzer. Summary of the Invention

[0005] This application provides a method, apparatus, equipment, storage medium, and program product for shutting down an electrolytic cell, in order to solve the technical problem of low safety during electrolytic cell shutdown.

[0006] In a first aspect, embodiments of this application provide a method for shutting down an electrolytic cell, including:

[0007] Determine the target pressure of the separation unit connected to multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers. The separation unit includes an oxygen separation unit and a hydrogen separation unit.

[0008] Based on the hydrogen generation rate, determine the initial total amount of inert gas to be injected;

[0009] The gas release from the oxygen separator and hydrogen separator is controlled based on the target pressure and the corresponding injection pressure of the inert gas.

[0010] When the current pressure of the separation unit reaches the injection pressure, control the shutdown of multiple electrolytic cells;

[0011] Based on the first total amount, inert gas is injected into the oxygen separation unit and the hydrogen separation unit.

[0012] In one possible implementation, determining the first total amount of inert gas to be injected based on the hydrogen generation rate includes:

[0013] Based on the hydrogen generation rate, predict the amount of residual hydrogen in the oxygen separation unit after the electrolyzer is shut down;

[0014] Based on the amount of hydrogen remaining, determine the initial total amount of inert gas to be injected.

[0015] In one possible implementation, predicting the amount of residual hydrogen in the oxygen separation unit after the electrolyzer is shut down, based on the hydrogen generation rate, includes:

[0016] Determine multiple first pressures in the electrolyzer corresponding to the hydrogen generation rate. The first pressure is the pressure value of the electrolyzer during the hydrogen generation process.

[0017] Based on the hydrogen generation rate and multiple first pressures, the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down is predicted.

[0018] In one possible implementation, the gas release from the oxygen separator and the hydrogen separator is controlled according to the target pressure and the injection pressure corresponding to the inert gas, including:

[0019] When the target pressure is less than or equal to the injection pressure corresponding to the inert gas, determine the pressure difference between the target pressure and the injection pressure;

[0020] The opening degree of the first valve of the oxygen separator and the opening degree of the second valve of the hydrogen separator are determined based on the pressure difference.

[0021] The gas release from the oxygen separator and hydrogen separator is controlled based on the opening degree of the first valve and the second valve.

[0022] In one possible implementation, according to a first total amount, inert gas is injected into the oxygen separator and the hydrogen separator, including:

[0023] Based on the first total amount and the first duration, determine the first flow rate of the inert gas to be injected, where the first duration is a pre-set pressure reduction duration;

[0024] Determine the current pressure of the separation unit;

[0025] When the current pressure is less than or equal to the injection pressure, inert gas is injected into the oxygen separator and the hydrogen separator according to the first flow rate.

[0026] In one possible implementation, when the current pressure of the separation unit reaches the injection pressure, controlling the shutdown of multiple electrolytic cells includes:

[0027] When the pressure in the separation unit reaches the injection pressure, the hydrogen concentration in the oxygen separation unit is detected.

[0028] When the hydrogen concentration is less than or equal to the first threshold, multiple electrolyzers are shut down.

[0029] In one possible implementation, when the hydrogen concentration is less than or equal to a first threshold, controlling the shutdown of multiple electrolyzers includes:

[0030] When the hydrogen concentration is less than or equal to the first threshold, the operating information of each electrolyzer is acquired, and the operating information is used to indicate the operating status of the electrolyzer.

[0031] Based on the operating information, the aging degree of each electrolyzer is determined. The aging degree is used to indicate the rate of hydrogen generation in the electrolyzer.

[0032] Based on the aging degree of each electrolyzer, multiple electrolyzers are sorted to obtain a sorting result. The sorting result is used to indicate the degree of influence of the aging degree of each electrolyzer on the hydrogen generation rate.

[0033] Based on the sorting results, multiple electrolytic cells are shut down.

[0034] Secondly, embodiments of this application provide a shutdown device for an electrolytic cell, comprising: a first determining module, a second determining module, a control module, and a processing module, wherein,

[0035] The first determining module is used to determine the target pressure of the separation device connected to multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers. The separation device includes an oxygen separation device and a hydrogen separation device.

[0036] The second determining module is used to determine the first total amount of inert gas to be injected based on the hydrogen generation rate.

[0037] The control module is used to control the gas release of the oxygen separation unit and the hydrogen separation unit according to the target pressure and the injection pressure corresponding to the inert gas;

[0038] The control module is also used to control multiple electrolytic cells to shut down when the current pressure of the separation unit reaches the injection pressure;

[0039] The processing module is used to inject inert gas into the oxygen separator and the hydrogen separator according to the first total amount.

[0040] In one possible implementation, the second determining module is specifically used for:

[0041] Based on the hydrogen generation rate, predict the amount of residual hydrogen in the oxygen separation unit after the electrolyzer is shut down;

[0042] Based on the amount of hydrogen remaining, determine the initial total amount of inert gas to be injected.

[0043] In one possible implementation, the second determining module is specifically used for:

[0044] Determine multiple first pressures in the electrolyzer corresponding to the hydrogen generation rate. The first pressure is the pressure value of the electrolyzer during the hydrogen generation process.

[0045] Based on the hydrogen generation rate and multiple first pressures, the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down is predicted.

[0046] In one possible implementation, the control module is specifically used for:

[0047] When the target pressure is less than or equal to the injection pressure corresponding to the inert gas, determine the pressure difference between the target pressure and the injection pressure;

[0048] The opening degree of the first valve of the oxygen separator and the opening degree of the second valve of the hydrogen separator are determined based on the pressure difference.

[0049] The gas release from the oxygen separator and hydrogen separator is controlled based on the opening degree of the first valve and the second valve.

[0050] In one possible implementation, the processing module is specifically used for:

[0051] Based on the first total amount and the first duration, determine the first flow rate of the inert gas to be injected, where the first duration is a pre-set pressure reduction duration;

[0052] Determine the current pressure of the separation unit;

[0053] When the current pressure is less than or equal to the injection pressure, inert gas is injected into the oxygen separator and the hydrogen separator according to the first flow rate.

[0054] In one possible implementation, the control module is also used for:

[0055] When the pressure in the separation unit reaches the injection pressure, the hydrogen concentration in the oxygen separation unit is detected.

[0056] When the hydrogen concentration is less than or equal to the first threshold, multiple electrolyzers are shut down.

[0057] In one possible implementation, the control module is also used for:

[0058] When the hydrogen concentration is less than or equal to the first threshold, the operating information of each electrolyzer is acquired, and the operating information is used to indicate the operating status of the electrolyzer.

[0059] Based on the operating information, the aging degree of each electrolyzer is determined. The aging degree is used to indicate the rate of hydrogen generation in the electrolyzer.

[0060] Based on the aging degree of each electrolyzer, multiple electrolyzers are sorted to obtain a sorting result. The sorting result is used to indicate the degree of influence of the aging degree of each electrolyzer on the hydrogen generation rate.

[0061] Based on the sorting results, multiple electrolytic cells are shut down.

[0062] Thirdly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0063] The memory stores the instructions that the computer executes;

[0064] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0065] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0066] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0067] This application provides a method, apparatus, device, storage medium, and program product for shutting down an electrolytic cell. The method determines the target pressure of a separation device connected to multiple electrolytic cells and the hydrogen generation rate of the multiple electrolytic cells. The separation device includes an oxygen separation device and a hydrogen separation device. Based on the hydrogen generation rate, a first total amount of inert gas to be injected is determined. Based on the target pressure and the corresponding injection pressure of the inert gas, the gas release from the oxygen and hydrogen separation devices is controlled. When the current pressure of the separation device reaches the injection pressure, the multiple electrolytic cells are shut down. Based on the first total amount, inert gas is injected into the oxygen and hydrogen separation devices. In this method, the electronic device determines the amount of inert gas to be injected based on the hydrogen generation rate, which avoids resource waste caused by excessive inert gas injection or incomplete dilution caused by insufficient injection. Furthermore, by simultaneously injecting inert gas during the pressure reduction process, residual hydrogen in the electrolytic cells and separation devices can be thoroughly removed, ensuring that the hydrogen content in the oxygen separation device remains within the normal range, thus improving the safety of electrolytic cell shutdown. Attached Figure Description

[0068] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0069] Figure 1 This is a schematic diagram illustrating an application scenario provided in the embodiments of this application;

[0070] Figure 2 A schematic diagram of a shutdown method for an electrolytic cell provided in this application;

[0071] Figure 3A schematic diagram of the inert gas injection method provided in this application;

[0072] Figure 4 A schematic diagram illustrating the shutdown method for the multiple electrolytic cells provided in this application;

[0073] Figure 5 A schematic diagram illustrating another method for shutting down an electrolytic cell provided in an embodiment of this application;

[0074] Figure 6 A schematic diagram of the structure of a shutdown device for an electrolytic cell provided in this application;

[0075] Figure 7 A schematic diagram of the structure of the electronic device provided in this application.

[0076] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0077] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0078] It should be noted that, in the description of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The terms "first," "second," etc., in this application are used to distinguish similar objects and are not used to describe a specific order or sequence.

[0079] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, they do not mean that the applicant has used or necessarily used the solution.

[0080] To facilitate understanding, the following will be combined with... Figure 1 The application scenarios applicable to the embodiments of this application will be described.

[0081] Figure 1 This is a schematic diagram illustrating an application scenario provided in an embodiment of this application. Please refer to [link / reference]. Figure 1 It includes terminal equipment, electronic equipment and electrolysis system, wherein the electrolysis system includes multiple electrolytic cells and separation devices, and the separation devices are connected to the multiple electrolytic cells respectively for gas-liquid separation of the gas generated by the electrolytic cells.

[0082] The terminal device and the electronic device can communicate with each other. This means that the user can send shutdown information to the electronic device through the terminal device. The electronic device can process the received shutdown information and, based on the processing result, control the electrolytic cell of the electrolysis system to complete the shutdown operation, and control the separation device of the electrolysis system to complete the gas-liquid separation operation. Notably, the electronic device and the terminal device can be the same device, meaning it can acquire shutdown information during its own operation and control the electrolysis system to complete the relevant processing.

[0083] In related technologies, shutdown is typically achieved by directly cutting off the power supply, and residual gases in the electrolyzer and separation unit are discharged through gas-liquid separation and displacement operations. However, in this process, the pressure inside the electrolyzer after direct shutdown may fluctuate significantly, making it difficult to remove residual gases in time. This can cause the hydrogen content on the oxygen side of the electrolyzer to exceed the normal range, resulting in low safety during electrolyzer shutdown.

[0084] This application provides a method, apparatus, equipment, storage medium, and program product for shutting down an electrolytic cell. By acquiring the target pressure of a separation device connected to multiple electrolytic cells and the hydrogen generation rate of the multiple electrolytic cells, a first total amount of inert gas to be injected is determined based on the hydrogen generation rate. Based on the target pressure, the inert gas injection pressure, and the first total amount, the gas release and injection of the hydrogen-oxygen separation device are coordinated and controlled. When the system pressure reaches the injection pressure, the electrolytic cell is shut down, and inert gas is injected into the separation device according to the first total amount. In the above method, the electronic equipment determines the amount of inert gas injected based on the hydrogen generation rate, which avoids resource waste caused by excessive inert gas injection or incomplete dilution caused by insufficient injection, thus achieving efficient utilization of inert gas. Furthermore, by controlling the phased operation of releasing gas to the injection pressure, shutting down, and re-injecting inert gas to the target pressure, the technical problem of large pressure fluctuations caused by direct shutdown is effectively solved, making the entire shutdown process more stable and reducing uneven gas mixing. Moreover, by simultaneously injecting inert gas during the depressurization process, residual hydrogen in the electrolyzer and separation unit can be completely removed, ensuring that the hydrogen content in the oxygen separation unit remains within the normal range, thus improving the safety of electrolyzer shutdown. In addition, this method is adaptable to large-scale hydrogen production scenarios with "multiple electrolyzers and one separation unit," improving the overall operation and maintenance efficiency of the hydrogen production system while ensuring shutdown safety and stability.

[0085] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0086] Figure 2 A schematic diagram of a shutdown method for an electrolytic cell provided in this application is shown below. Figure 2 As shown, the method includes:

[0087] S201. Determine the target pressure of the separation unit connected to multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers.

[0088] The execution subject of this application embodiment can be an electronic device or a shutdown device for an electrolytic cell installed in an electronic device. The shutdown device for the electrolytic cell can be implemented by software or by a combination of software and hardware. The electronic device can be a terminal device or a server.

[0089] The separation device includes an oxygen separation device and a hydrogen separation device.

[0090] Electrolyzers are used to generate hydrogen and oxygen through electrolysis reactions. Multiple electrolyzers are connected in parallel to the same separation device.

[0091] The separation device is used to receive and process gases from multiple electrolyzers to achieve gas-liquid separation and gas purification. The separation device is connected to the gas outlet of the electrolyzer.

[0092] The oxygen separation unit is used to receive and process the oxygen and alkaline solution from each electrolytic cell to obtain separated oxygen.

[0093] The hydrogen separation unit is used to receive and process hydrogen and alkaline solution from each electrolyzer to obtain separated hydrogen.

[0094] The target pressure can be a pre-set pressure value that the separation device needs to reach. Since the electrolytic cell and the separation device are connected, the target pressure can be the pressure value that both the electrolytic cell and the separation device need to drop to after shutdown.

[0095] In some embodiments, in order to ensure that the inert gas can be effectively injected into the separation device, the target pressure needs to be less than the injection pressure of the inert gas. Therefore, the electronic device can determine the target pressure in the following way: obtain the injection pressure of the inert gas. In this embodiment, the injection pressure of the inert gas can be set to 0.7 MPa; determine the maximum allowable target pressure of the separation device based on the injection pressure of the inert gas; and determine the final target pressure within a preset pressure range based on the pressure-bearing characteristics of the electrolyzer and the separation device and actual needs, according to the maximum allowable target pressure, wherein the final target pressure is less than or equal to the maximum allowable target pressure.

[0096] When the electronic device determines the target pressure that the separation device can allow, it can determine the maximum target pressure based on a preset empirical coefficient. The empirical coefficient is used to indicate the degree of influence of the injection pressure on the target pressure. For example, the empirical coefficient can be set to 0.5, then the maximum allowable target pressure can be 0.35 MPa, and the final target pressure can be set to 0.2 MPa.

[0097] Optionally, the electronic device can determine the target pressure value based on a preset mapping table. This preset mapping table includes the correlation between the inert gas injection pressure and the target pressure; that is, the electronic device can determine the corresponding target pressure based on the set inert gas injection pressure. For example, the preset mapping table might include: when the inert gas injection pressure is 0.7 MPa, the corresponding target pressure is 0.5 MPa; and when the inert gas injection pressure is 0.6 MPa, the corresponding target pressure is 0.2 MPa.

[0098] In this way, the target pressure can be determined in the above manner, which not only ensures that the inert gas can be smoothly injected into the separation device by relying on the positive pressure difference, but also ensures that the entire electrolysis system operates within a safe pressure range, providing a reliable pressure reference for subsequent shutdown operations.

[0099] The hydrogen generation rate can be defined as the amount of hydrogen produced by the electrolyzer per unit time.

[0100] In some embodiments, the electronic device can collect the current data of each electrolyzer before shutdown in real time, and determine the hydrogen content produced by the electrolyzer per unit time, i.e. the hydrogen generation rate, by the relationship between the current and the hydrogen production in the electrolyzer. The current data is used to indicate the amount of charge flowing through the electrolyzer per unit time.

[0101] In practical applications, energy loss may occur during the electrolysis process of the electrolyzer. Therefore, a correction factor can be set to calibrate the hydrogen generation rate mentioned above to obtain the actual hydrogen generation rate. The correction factor can be set according to the actual operating conditions of the electrolysis system to ensure the accuracy and reliability of the hydrogen generation rate data.

[0102] S202. Determine the initial total amount of inert gas to be injected based on the hydrogen generation rate.

[0103] The first total amount can be the total amount of inert gas that needs to be injected during the depressurization process. In other words, the first total amount can be the total amount of inert gas that needs to be injected into the separation device during the process of reducing the injection pressure to the target pressure. In this way, it can be ensured that the oxygen-side hydrogen content in the separation device is within the normal range.

[0104] In some embodiments, the electronic device may determine the first total amount of inert gas to be injected based on the hydrogen generation rate by: predicting the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down based on the hydrogen generation rate; and determining the first total amount of inert gas to be injected based on the amount of hydrogen remaining.

[0105] The residual hydrogen content can be defined as the amount of hydrogen that permeates from the hydrogen side into the oxygen separation unit in the electrolyzer after shutdown, i.e., the oxygen-side hydrogen content.

[0106] In some embodiments, there is a correlation between the hydrogen generation rate and the amount of residual hydrogen. That is, the higher the hydrogen generation rate, the more hydrogen diffuses and accumulates into the oxygen separation unit during the operation of the electrolyzer, and the amount of residual hydrogen that is not discharged after shutdown will also increase accordingly. Therefore, it is necessary to predict the amount of residual hydrogen by using the hydrogen generation rate to provide a basis for accurately matching the total amount of inert gas injected.

[0107] In some embodiments, the electronic device may predict the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down, based on the hydrogen generation rate, by: determining a plurality of first pressures in the electrolyzer corresponding to the hydrogen generation rate; and predicting the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down, based on the hydrogen generation rate and the plurality of first pressures.

[0108] The first pressure refers to the pressure value of the electrolyzer during the hydrogen generation process. In other words, the first pressure can be the real-time pressure value on the hydrogen side of the electrolyzer during hydrogen production.

[0109] In some embodiments, there is a correlation between the hydrogen generation rate and the real-time pressure value. The higher the hydrogen generation rate, the faster the hydrogen is generated and accumulated in the electrolyzer, and the higher the corresponding first pressure. That is, the higher the first pressure, the greater the difference between the first and oxygen side pressures, and the greater the rate and amount of hydrogen permeating into the oxygen side. Therefore, it is necessary to predict the amount of hydrogen remaining based on the amount of hydrogen generated per unit time (hydrogen generation rate) and the hydrogen side pressure data (first pressure) at different generation rate stages per unit time.

[0110] In some embodiments, the electronic device can determine multiple first pressures based on pressure data collected in the electrolyzer. Specifically, the hydrogen outlet pipe or hydrogen-side cavity of the electrolyzer includes a pressure detection device (e.g., a pressure sensor). The pressure monitoring device can periodically detect the pressure on the hydrogen side. After receiving the pressure signal sent by the pressure monitoring device, the electronic device can filter the pressure signal to obtain multiple first pressures.

[0111] In some embodiments, the electronic device can use the hydrogen generation rate of the electrolyzer and multiple first pressures during a historical period before shutdown as input data, and through a pre-trained neural network model (e.g., a long short-term memory neural network model), predict the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down.

[0112] Specifically, the electronic device can arrange the hydrogen generation rate and initial pressure in a time series to obtain time-series data for each moment. This time-series data is then used as model input. The model input includes parameters such as the hydrogen generation rate, system operating pressure, and hydrogen-oxygen pressure difference at the current moment and multiple previous sampling moments. Through a long short-term memory network structure, the mapping relationship between multiple parameters, including the hydrogen generation rate, pressure, and hydrogen-oxygen pressure difference, and the final hydrogen residue can be obtained. In other words, the model output is the predicted maximum hydrogen residue within a future period (after shutdown).

[0113] In this way, by employing a neural network-based prediction method, electronic devices can fully utilize the deep features in multi-parameter time-series data to accurately predict hydrogen residue levels, providing a reliable basis for subsequent precise control of inert gases. Compared to traditional estimation methods based on fixed permeability, this method has higher adaptability and prediction accuracy.

[0114] In some embodiments, after the electronic device determines the amount of hydrogen remaining, the electronic device can determine a preset threshold for the hydrogen content on the oxygen side, and determine a first total amount of inert gas to be injected based on the preset threshold and the amount of hydrogen remaining. That is, the electronic device can compare the amount of hydrogen remaining with the preset threshold, and combine it with the real-time monitored hydrogen concentration data to determine the total amount of inert gas to be injected when the hydrogen content on the oxygen side is equal to the preset threshold. If the hydrogen concentration data shows an upward trend, the first total amount is appropriately increased; if the hydrogen concentration data continues to decrease, the first total amount is maintained or appropriately decreased.

[0115] Optionally, the electronic device can use a neural network model to take the residual hydrogen amount as input data and output the first total amount of inert gas. Specifically, it can predict the residual hydrogen demand based on a dynamic model and optimize the nitrogen dilution efficiency through machine learning algorithms. This effectively solves the problem that existing technologies rely on fixed nitrogen flow rates or empirical parameters and cannot adapt to the real-time needs of electrolyzer clusters of different sizes. That is, by introducing a neural network model, the nitrogen flow rate demand can be dynamically predicted based on historical shutdown data and real-time sensor information (e.g., current, pressure, hydrogen flow rate, etc.).

[0116] The model learns the relationship between hydrogen generation rate and nitrogen dilution effect during electrolyzer shutdown and adjusts nitrogen flow rate in real time to minimize residual hydrogen. For example, during periods of high hydrogen generation rate, the model automatically increases nitrogen flow rate to accelerate dilution; while during periods of low generation rate, it reduces nitrogen flow rate to avoid over-dilution.

[0117] S203. Control the gas release of the oxygen separation device and the hydrogen separation device according to the target pressure and the corresponding injection pressure of the inert gas.

[0118] The injection pressure corresponding to the inert gas can be the pressure at which the inert gas is initially injected into the separation device, where the inert gas can be nitrogen.

[0119] In some embodiments, the electronic device may control the gas release of the oxygen separator and the hydrogen separator based on the target pressure and the injection pressure corresponding to the inert gas, as follows: when the target pressure is less than or equal to the injection pressure corresponding to the inert gas, determine the pressure difference between the target pressure and the injection pressure; determine the opening degree of the first valve of the oxygen separator and the second valve of the hydrogen separator based on the pressure difference; and control the gas release of the oxygen separator and the hydrogen separator based on the opening degree of the first valve and the second valve.

[0120] The first valve opening can be the degree to which the valve of the oxygen separation device is open; that is, the first valve opening is used to indicate the oxygen release rate.

[0121] The second valve opening can be the degree to which the valve of the hydrogen separation device is open, that is, the first valve opening is used to indicate the hydrogen release rate.

[0122] In this embodiment of the application, when no inert gas is injected into the separation device, the pressure of the separation device and the electrolytic cell is usually greater than the injection pressure. That is, the process of controlling the gas release of the oxygen separation device and the hydrogen separation device includes two stages. In the first stage, when the pressure of the separation device is greater than the injection pressure of the inert gas, the opening degree of the first valve A and the opening degree of the second valve B are determined. In the second stage, when the pressure of the separation device is less than or equal to the injection pressure of the inert gas, the corresponding opening degree of the first valve C and the opening degree of the second valve D are determined. The opening degree of the first valve A is greater than or equal to the opening degree of the first valve C, and the opening degree of the second valve B is greater than or equal to the opening degree of the second valve D.

[0123] For example, if the pressure of the separation device is 1.7 MPa, the injection pressure of the inert gas is 0.7 MPa, and the target pressure is 0.2 MPa, then the first stage is the pressure from 1.7 MPa to 0.7 MPa. In order to quickly reduce the pressure to the injection pressure, the opening of the first valve and the opening of the second valve can be increased (for example, the valve opening is 70%) to quickly discharge the gas. The second stage is the pressure from 0.7 MPa to 0.2 MPa. The opening of the first valve and the opening of the second valve can be reduced (for example, the valve opening is 50%), that is, the gas discharge is slowed down to avoid the sudden pressure drop causing uneven dilution of the inert gas and the gas in the separation device.

[0124] In some embodiments, the electronic device may employ a hierarchical control strategy to determine the opening degree of the first valve of the oxygen separator and the second valve of the hydrogen separator based on the pressure difference. Specifically, a first pressure threshold and a second pressure threshold are determined. The first pressure threshold is used to determine whether the pressure difference is large, and the second pressure threshold is used to determine whether the pressure difference is small. When the pressure difference is greater than or equal to the first pressure threshold, a larger first valve opening and a larger second valve opening are set (e.g., valve opening of 50%). When the pressure difference is greater than the second pressure threshold and less than the first pressure threshold, a suitable first valve opening and a smaller second valve opening are set (e.g., valve opening of 30%). When the pressure difference is less than or equal to the second pressure threshold, a smaller first valve opening and a smaller second valve opening are set (e.g., valve opening of 10%), i.e., fine-tuning is performed using the minimum opening to ensure a smooth approach to the target pressure.

[0125] In some embodiments, after the electronic device determines the opening degree of the first valve and the opening degree of the second valve, the electronic device can simultaneously control the outlet valve of the oxygen separator and the outlet valve of the hydrogen separator to ensure pressure balance of the separators.

[0126] S204. When the current pressure of the separation unit reaches the injection pressure, control multiple electrolytic cells to stop.

[0127] In some embodiments, when the electronic device determines that the current pressure of the separation device and the electrolytic cell is equal to the injection pressure of the inert gas, for example, the current pressure is equal to the injection pressure of 0.7 MPa, multiple electrolytic cells can be shut down.

[0128] In some embodiments, when the pressure of the separation device is reduced, the electronic equipment can use a staged control method to coordinate the shutdown operation of multiple electrolytic cells. Specifically, during the pressure reduction process of the separation device, the electronic equipment can control the electrolytic cells to shut down in batches according to the number of electrolytic cells. For example, when the pressure drops to the first stage pressure, the electronic equipment controls the first batch of electrolytic cells to shut down; when the pressure drops to the second stage pressure, the electronic equipment controls the second batch of electrolytic cells to shut down; until the current pressure of the separation device drops to the injection pressure, the electronic equipment controls the last batch of electrolytic cells to shut down. In this way, it can be ensured that the shutdown operation of all electrolytic cells is completed synchronously at the moment when the system pressure accurately reaches the injection pressure.

[0129] For example, if the pressure of the separation device is 1.7 MPa, the first stage pressure is 1.4 MPa, the second stage pressure is 1.0 MPa, and the third stage pressure is 0.7 MPa (injection pressure), and the number of electrolytic cells is 30, they can be divided into three batches of 10 electrolytic cells each. That is, when the pressure of the separation device drops from 1.7 MPa to 1.4 MPa, the electronic equipment controls the shutdown of the first batch of 10 electrolytic cells; when the pressure of the separation device drops from 1.4 MPa to 1.0 MPa, the electronic equipment controls the shutdown of the second batch of 10 electrolytic cells; and when the pressure of the separation device drops from 1.0 MPa to 0.7 MPa, the electronic equipment controls the shutdown of the third batch of 10 electrolytic cells.

[0130] S205. Based on the first total amount, inject inert gas into the oxygen separation unit and the hydrogen separation unit.

[0131] In some embodiments, the electronic device may determine the flow rate of inert gas injected into the oxygen separator and the hydrogen separator per unit time based on a first total amount, and inject inert gas into the separator according to the flow rate of inert gas.

[0132] This application provides a method, apparatus, equipment, storage medium, and program product for shutting down an electrolytic cell. By acquiring the target pressure of a separation device connected to multiple electrolytic cells and the hydrogen generation rate of the multiple electrolytic cells, a first total amount of inert gas to be injected is determined based on the hydrogen generation rate. Based on the target pressure, the inert gas injection pressure, and the first total amount, the gas release and injection of the hydrogen-oxygen separation device are coordinated and controlled. When the system pressure reaches the injection pressure, the electrolytic cell is shut down, and inert gas is injected into the separation device according to the first total amount. In the above method, the electronic device determines the amount of inert gas injected based on the hydrogen generation rate. This avoids resource waste caused by excessive inert gas injection or incomplete dilution due to insufficient injection, achieving efficient utilization of inert gas. Furthermore, by controlling the phased operation of releasing gas to the injection pressure, stopping the machine, and then re-injecting inert gas to the target pressure, the technical problem of large pressure fluctuations caused by direct shutdown is effectively solved, making the entire shutdown process smoother and reducing uneven gas mixing. Moreover, by simultaneously injecting inert gas during the depressurization process, residual hydrogen in the electrolyzer and separation unit can be completely removed, ensuring that the hydrogen content in the oxygen separation unit remains within the normal range, thus improving the safety of electrolyzer shutdown.

[0133] Figure 3 A schematic diagram of the inert gas injection method provided in this application is shown below. Figure 3 As shown, in this embodiment... Figure 2 Based on the embodiments, the method for injecting inert gas is described in detail, which includes:

[0134] S301. Determine the first flow rate of the inert gas to be injected based on the first total amount and the first duration.

[0135] The first duration is the preset blood pressure reduction duration.

[0136] The first flow rate can be the total amount of inert gas injected per unit time.

[0137] In some embodiments, the electronic device can determine the first flow rate of inert gas to be injected as the ratio of the first total amount to the first duration, and the electronic device can determine the injection rate of inert gas during the time period based on the first flow rate and the pressure of the separation device. It should be noted that the injection rate of inert gas is related to the pressure of the separation device.

[0138] S302. Determine the current pressure of the separation device.

[0139] The current pressure can be the pressure value of the separation device at the current moment.

[0140] In some embodiments, the electronic device can determine the current pressure of the separation device based on a pressure detection device (e.g., a high-precision pressure sensor) in the separation device to determine whether the separation device has reached the state of inert gas injection. This pressure monitoring process is continuously performed at a preset sampling frequency to ensure the real-time nature and accuracy of the pressure data.

[0141] S303. When the current pressure is less than or equal to the injection pressure, inert gas is injected into the oxygen separator and the hydrogen separator according to the first flow rate.

[0142] In some embodiments, the electronic device continuously compares the current pressure with the injection pressure. When the pressure condition is met, it begins to inject inert gas into the separation device. That is, based on the calculated first flow rate, the injection process is precisely controlled by a flow regulating valve to inject inert gas into the oxygen separation device and the hydrogen separation device.

[0143] Optionally, during the injection of inert gas, inert gas is preferentially injected into the oxygen separation unit to ensure a rapid reduction in hydrogen concentration. The injection flow rate is dynamically and finely adjusted according to real-time pressure changes to avoid drastic fluctuations in system pressure. At the same time, safety interlock protection is set up during the injection process to immediately stop the injection when an abnormality is detected. Furthermore, during the injection process, key parameters, including cumulative injection volume, flow curve, and pressure changes, are recorded in real time.

[0144] In this way, by precisely matching the inert gas injection rate with the depressurization process, it is possible to ensure that the injection process and the depressurization process are completed synchronously, without either excessively fast injection causing large pressure fluctuations in the separation device or insufficient inert gas being injected before the depressurization process ends due to excessively slow injection, thus preventing inadequate dilution of the hydrogen.

[0145] This application provides a shutdown method, apparatus, equipment, storage medium, and program product for an electrolytic cell. By determining the first flow rate of inert gas to be injected based on a first total quantity and a first duration, and determining the current pressure of the separation devices, inert gas is injected into the oxygen and hydrogen separation devices according to the first flow rate when the current pressure is less than or equal to the injection pressure. In this method, the electronic equipment converts the predetermined total gas demand into precise flow control parameters and triggers the injection operation by combining real-time pressure monitoring. This enables precise control of the inert gas injection process when the gas injection volume does not match the actual system state in traditional methods, effectively avoiding gas waste or safety issues caused by over- or under-injection. It eliminates the need for manual judgment, improving the accuracy and reliability of gas injection. By establishing a dual control mechanism based on pressure and flow, gas replacement is ensured under appropriate system pressure conditions, and the utilization efficiency of inert gas is significantly improved while enhancing shutdown safety.

[0146] Figure 4 A schematic diagram illustrating the shutdown method for the multiple electrolytic cells provided in this application, as shown below. Figure 4 As shown, in this embodiment... Figure 3 Based on the embodiments, a shutdown method for multiple electrolytic cells is described in detail, which includes:

[0147] S401. When the pressure of the separation device reaches the injection pressure, detect the hydrogen concentration in the oxygen separation device.

[0148] In some embodiments, continuous monitoring of the hydrogen concentration in the oxygen separation device is required when the pressure in the separation device begins to drop. The electronic device can acquire real-time concentration data at a preset sampling frequency using a high-precision hydrogen concentration sensor and record the concentration change trend.

[0149] S402. When the hydrogen concentration is less than or equal to the first threshold, control multiple electrolyzers to shut down.

[0150] The first threshold is used to determine whether the hydrogen content on the oxygen side exceeds the normal range.

[0151] In some embodiments, when the system pressure reaches the injection pressure, the electronic device acquires the current hydrogen concentration value and compares it with a set first threshold (e.g., 2%). If the oxygen-side hydrogen content is less than or equal to 2%, it indicates that the oxygen-side hydrogen content is within the normal range. The first threshold is typically set to a safe concentration range of 1.5%-2.0%. Once the hydrogen concentration is confirmed to meet safety conditions, the electronic device immediately initiates the multi-electrolyte shutdown procedure.

[0152] In some embodiments, the electronic device may control the shutdown of multiple electrolyzers when the hydrogen concentration is less than or equal to a first threshold by: acquiring the operating information of each electrolyzer when the hydrogen concentration is less than or equal to the first threshold; determining the aging degree of each electrolyzer based on the operating information; sorting the multiple electrolyzers according to the aging degree of each electrolyzer to obtain a sorting result, the sorting result being used to indicate the degree of influence of the aging degree of each electrolyzer on the hydrogen generation rate; and controlling the shutdown of multiple electrolyzers according to the sorting result.

[0153] The operating information is used to indicate the operating status of the electrolyzers. For example, the operating information includes the cumulative operating time of each electrolyzer. The cumulative operating time of the electrolyzers is related to the hydrogen generation rate. For example, if the cumulative operating time of electrolyzer A is time A and the cumulative operating time of electrolyzer B is time B, time A is greater than time B, meaning that the hydrogen generation rate of electrolyzer A is less than the hydrogen generation rate of electrolyzer B.

[0154] The degree of aging is used to indicate the rate at which hydrogen is generated in the electrolyzer. For example, if the hydrogen generation rate of electrolyzer A is greater than that of electrolyzer B, then the degree of aging of electrolyzer A is determined to be less than that of electrolyzer B.

[0155] In some embodiments, electronic devices can sort the electrolytic cells from largest to smallest aging degree to obtain a sorting result. For example, if there are three electrolytic cells, namely electrolytic cell A, electrolytic cell B and electrolytic cell C, and the aging degree of electrolytic cell A < the aging degree of electrolytic cell B < the aging degree of electrolytic cell C, then the aging degree of the three electrolytic cells is sorted, and the sorting result is electrolytic cell C, electrolytic cell B and electrolytic cell A.

[0156] In some embodiments, the electronic device can control the shutdown of each electrolytic cell according to the sorting result. Specifically, for the i-th electrolytic cell in the sorting result, the power supply and liquid inlet valve of the i-th electrolytic cell are controlled to be closed. After determining that the power supply and liquid inlet valve of the i-th electrolytic cell are closed, the power supply and liquid inlet valve of the (i+1)-th electrolytic cell are controlled to be closed, where i takes the values ​​1, 2, ..., N-1 in sequence, and N is the number of electrolytic cells.

[0157] For example, if the sorting result includes three electrolytic cells, namely electrolytic cell A, electrolytic cell B, and electrolytic cell C, the electronic device can sequentially control the shutdown of electrolytic cell A (with a higher degree of aging), electrolytic cell B (with a medium degree of aging), and electrolytic cell C (with a lower degree of aging), that is, cut off the power supply and close the liquid inlet valve.

[0158] In some embodiments, when the system pressure drops to a set value and a phased shutdown is performed, due to the "many-to-one" structure, the aging degree of multiple electrolyzers may be different, resulting in different hydrogen production rates. Therefore, the power supply and water inlet valve of the electrolyzer with the higher hydrogen flow rate can be shut down first, based on the hydrogen flow rate of each electrolyzer. In this way, when multiple electrolyzers are shut down, the generation rate of hydrogen-oxygen mixture can be reduced, and the peak value of hydrogen concentration in oxygen can be reduced.

[0159] This application provides a method, apparatus, equipment, storage medium, and program product for shutting down electrolytic cells. By monitoring the hydrogen concentration on the oxygen side when the pressure of the separation unit reaches the injection pressure, and determining the shutdown sequence based on the aging degree of each electrolytic cell when the concentration reaches the target, multiple electrolytic cells can be safely shut down. In this process, the electronic equipment can utilize the inherent correlation between the pressure state of the separation unit, the safe threshold of hydrogen concentration in the oxygen separation unit, and the aging degree of the electrolytic cells to perform shutdown operations while ensuring the system remains in a safe state. This allows for precise control of the timing and sequence of shutdown for multiple electrolytic cells, achieving precise and safe control of the shutdown process and improving its reliability and safety.

[0160] Figure 5This is a schematic diagram illustrating another method for shutting down an electrolytic cell provided in an embodiment of this application. Please refer to... Figure 5 The method may include:

[0161] S501. Determine the target pressure of the separation unit connected to multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers.

[0162] The separation device includes an oxygen separation device and a hydrogen separation device.

[0163] It should be noted that the execution process of S501 can be found in S201, and will not be repeated here.

[0164] S502. Determine multiple first pressures in the electrolyzer corresponding to the hydrogen generation rate. The first pressure is the pressure value of the electrolyzer during the hydrogen generation process.

[0165] S503. Based on the hydrogen generation rate and multiple first pressures, predict the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down.

[0166] S504. Determine the first total amount of inert gas to be injected based on the amount of hydrogen remaining.

[0167] It should be noted that the execution process of S502-S504 above can be found in S202, and will not be repeated here.

[0168] S505. When the target pressure is less than or equal to the injection pressure corresponding to the inert gas, determine the pressure difference between the target pressure and the injection pressure.

[0169] S506. Determine the opening degree of the first valve of the oxygen separator and the second valve of the hydrogen separator based on the pressure difference.

[0170] S507. Control the gas release of the oxygen separation device and the hydrogen separation device according to the opening degree of the first valve and the second valve.

[0171] It should be noted that the execution process of S505-S507 above can be found in S203, and will not be repeated here.

[0172] S508. When the pressure of the separation device reaches the injection pressure, detect the hydrogen concentration in the oxygen separation device.

[0173] S509. When the hydrogen concentration is less than or equal to the first threshold, obtain the operating information of each electrolyzer. The operating information is used to indicate the operating status of the electrolyzer.

[0174] S510. Based on the operating information, determine the aging degree of each electrolyzer. The aging degree is used to indicate the rate of hydrogen generation in the electrolyzer.

[0175] S511. Based on the aging degree of each electrolytic cell, sort the multiple electrolytic cells to obtain the sorting result.

[0176] The sorting results are used to indicate the degree of influence of the aging of each electrolyzer on the hydrogen generation rate.

[0177] S512. Based on the sorting results, control the shutdown of multiple electrolytic cells.

[0178] It should be noted that the execution process of S508-S512 can be found in S401-S402, and will not be repeated here.

[0179] S513. Determine the first flow rate of the inert gas to be injected based on the first total amount and the first duration.

[0180] The first duration is the preset blood pressure reduction duration.

[0181] S514. Determine the current pressure of the separation unit.

[0182] S515. When the current pressure is less than or equal to the injection pressure, inert gas is injected into the oxygen separator and the hydrogen separator according to the first flow rate.

[0183] It should be noted that the execution process of S513-S515 can be found in S301-S303, and will not be repeated here.

[0184] This application provides a shutdown method, apparatus, equipment, storage medium, and program product for an electrolyzer. The method involves reducing system pressure before shutdown, simultaneously diluting with nitrogen during the pressure reduction process to lower the hydrogen concentration in the oxygen. After shutting off the electrolyzer's power supply and inlet valve, a segmented shutdown logic of pressure reduction + dilution is used to safely shut down a large-scale alkaline electrolyzer. In this method, electronic equipment can dynamically adjust the nitrogen flow rate and shutdown control strategy based on online monitoring of the hydrogen concentration in the oxygen. Furthermore, through the combined measures of pressure reduction and dilution, the hydrogen content in the oxygen is consistently maintained below 2%, avoiding abnormal gas mixing caused by sudden pressure drops in traditional shutdown methods. This method is particularly suitable for large-scale alkaline electrolysis hydrogen production plants with multiple electrolyzers and a single separation unit. It does not require additional large equipment; it is achieved only through optimized control logic, resulting in low operating costs. This shutdown method is applicable to multi-electrolyzer-single-separation unit systems, improving the operational safety of large-scale plants.

[0185] Figure 6 A schematic diagram of the structure of a shutdown device for an electrolytic cell provided in this application is shown below. Figure 6 As shown, the electrolytic cell shutdown device 60 provided in this embodiment includes: a first determining module 61, a second determining module 62, a control module 63, and a processing module 64, wherein,

[0186] The first determining module 61 is used to determine the target pressure of the separation device connected to multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers. The separation device includes an oxygen separation device and a hydrogen separation device.

[0187] The second determining module 62 is used to determine the first total amount of inert gas to be injected based on the hydrogen generation rate.

[0188] The control module 63 is used to control the gas release of the oxygen separation device and the hydrogen separation device according to the target pressure and the injection pressure corresponding to the inert gas;

[0189] Control module 63 is also used to control multiple electrolytic cells to shut down when the current pressure of the separation unit reaches the injection pressure;

[0190] Processing module 64 is used to inject inert gas into the oxygen separator and the hydrogen separator according to the first total amount.

[0191] The electrolytic cell shutdown device provided in this application embodiment can execute the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar, and will not be described again here.

[0192] In one possible implementation, the second determining module 62 is specifically used for:

[0193] Based on the hydrogen generation rate, predict the amount of residual hydrogen in the oxygen separation unit after the electrolyzer is shut down;

[0194] Based on the amount of hydrogen remaining, determine the initial total amount of inert gas to be injected.

[0195] In one possible implementation, the second determining module 62 is specifically used for:

[0196] Determine multiple first pressures in the electrolyzer corresponding to the hydrogen generation rate. The first pressure is the pressure value of the electrolyzer during the hydrogen generation process.

[0197] Based on the hydrogen generation rate and multiple first pressures, the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down is predicted.

[0198] In one possible implementation, the control module 63 is specifically used for:

[0199] When the target pressure is less than or equal to the injection pressure corresponding to the inert gas, determine the pressure difference between the target pressure and the injection pressure;

[0200] The opening degree of the first valve of the oxygen separator and the opening degree of the second valve of the hydrogen separator are determined based on the pressure difference.

[0201] The gas release from the oxygen separator and hydrogen separator is controlled based on the opening degree of the first valve and the second valve.

[0202] In one possible implementation, the processing module 64 is specifically used for:

[0203] Based on the first total amount and the first duration, determine the first flow rate of the inert gas to be injected, where the first duration is a pre-set pressure reduction duration;

[0204] Determine the current pressure of the separation unit;

[0205] When the current pressure is less than or equal to the injection pressure, inert gas is injected into the oxygen separator and the hydrogen separator according to the first flow rate.

[0206] In one possible implementation, the control module 63 is further configured to:

[0207] When the pressure in the separation unit reaches the injection pressure, the hydrogen concentration in the oxygen separation unit is detected.

[0208] When the hydrogen concentration is less than or equal to the first threshold, multiple electrolyzers are shut down.

[0209] In one possible implementation, the control module 63 is further configured to:

[0210] When the hydrogen concentration is less than or equal to the first threshold, the operating information of each electrolyzer is acquired, and the operating information is used to indicate the operating status of the electrolyzer.

[0211] Based on the operating information, the aging degree of each electrolyzer is determined. The aging degree is used to indicate the rate of hydrogen generation in the electrolyzer.

[0212] Based on the aging degree of each electrolyzer, multiple electrolyzers are sorted to obtain a sorting result. The sorting result is used to indicate the degree of influence of the aging degree of each electrolyzer on the hydrogen generation rate.

[0213] Based on the sorting results, multiple electrolytic cells are shut down.

[0214] This embodiment provides a shutdown device for an electrolytic cell, which can execute the method provided in the above-described method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0215] Figure 7 A schematic diagram of the structure of the electronic device provided in this application. Figure 7 As shown, the electronic device 70 provided in this embodiment includes at least one processor 71 and a memory 72. Optionally, the electronic device 70 further includes a communication component 73. The processor 71, memory 72, and communication component 73 are connected via a bus.

[0216] In a specific implementation, at least one processor 71 executes computer execution instructions stored in memory 72, causing at least one processor 71 to perform the above-described method.

[0217] The specific implementation process of processor 71 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0218] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0219] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0220] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0221] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0222] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0223] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0224] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0225] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0226] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0227] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0228] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0229] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0230] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for shutting down an electrolytic cell, characterized in that, include: Determine the target pressure of a separation device connected to multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers, the separation device including an oxygen separation device and a hydrogen separation device; Based on the hydrogen generation rate, determine the first total amount of inert gas to be injected; The gas release of the oxygen separation device and the hydrogen separation device is controlled according to the target pressure and the injection pressure corresponding to the inert gas. When the current pressure of the separation device reaches the injection pressure, the plurality of electrolytic cells are controlled to shut down. The inert gas is injected into the oxygen separator and the hydrogen separator according to the first total amount.

2. The method according to claim 1, characterized in that, Based on the hydrogen generation rate, the first total amount of inert gas to be injected is determined, including: Based on the hydrogen generation rate, predict the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down; Based on the amount of hydrogen remaining, the first total amount of inert gas to be injected is determined.

3. The method according to claim 2, characterized in that, Based on the hydrogen generation rate, the predicted amount of residual hydrogen in the oxygen separation unit after the electrolyzer is shut down includes: Determine a plurality of first pressures in the electrolyzer corresponding to the hydrogen generation rate, wherein the first pressure is the pressure value of the electrolyzer during the hydrogen generation process; Based on the hydrogen generation rate and the plurality of first pressures, the amount of hydrogen remaining in the oxygen separation unit after the electrolyzer is shut down is predicted.

4. The method according to claim 1, characterized in that, Controlling the gas release of the oxygen separator and the hydrogen separator based on the target pressure and the injection pressure corresponding to the inert gas includes: When the target pressure is less than or equal to the injection pressure corresponding to the inert gas, the pressure difference between the target pressure and the injection pressure is determined; The opening degree of the first valve of the oxygen separator and the opening degree of the second valve of the hydrogen separator are determined based on the pressure difference. The gas release of the oxygen separation device and the hydrogen separation device is controlled according to the opening degree of the first valve and the opening degree of the second valve.

5. The method according to any one of claims 1-4, characterized in that, According to the first total amount, injecting the inert gas into the oxygen separation device and the hydrogen separation device includes: Based on the first total amount and the first duration, the first flow rate of the inert gas to be injected is determined, wherein the first duration is a preset depressurization duration; Determine the current pressure of the separation device; When the current pressure is less than or equal to the injection pressure, the inert gas is injected into the oxygen separator and the hydrogen separator according to the first flow rate.

6. The method according to claim 1, characterized in that, When the current pressure of the separation device reaches the injection pressure, controlling the multiple electrolytic cells to shut down includes: When the pressure in the separation device reaches the injection pressure, the hydrogen concentration in the oxygen separation device is detected; When the hydrogen concentration is less than or equal to a first threshold, the plurality of electrolytic cells are shut down.

7. The method according to claim 6, characterized in that, When the hydrogen concentration is less than or equal to a first threshold, controlling the shutdown of the plurality of electrolyzers includes: When the hydrogen concentration is less than or equal to a first threshold, the operating information of each electrolyzer is acquired, and the operating information is used to indicate the operating status of the electrolyzer. Based on the operating information, the aging degree of each electrolyzer is determined, and the aging degree is used to indicate the rate of hydrogen generation of the electrolyzer. According to the aging degree of each electrolyzer, the multiple electrolyzers are sorted to obtain a sorting result, which is used to indicate the degree of influence of the aging degree of each electrolyzer on the hydrogen generation rate. Based on the sorting results, the multiple electrolytic cells are controlled to shut down.

8. A shutdown device for an electrolytic cell, characterized in that, include: The system comprises a first determining module, a second determining module, a control module, and a processing module, wherein... The first determining module is used to determine the target pressure of the separation device connected to the multiple electrolyzers and the hydrogen generation rate of the multiple electrolyzers, wherein the separation device includes an oxygen separation device and a hydrogen separation device. The second determining module is used to determine the first total amount of inert gas to be injected based on the hydrogen generation rate; The control module is used to control the gas release of the oxygen separation device and the hydrogen separation device according to the target pressure, the injection pressure corresponding to the inert gas, and the first total amount; The control module is also used to control the multiple electrolytic cells to shut down when the current pressure of the separation device reaches the injection pressure; The processing module is used to inject the inert gas into the oxygen separator and the hydrogen separator according to the first total amount.

9. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-7.

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