Control method and device of water electrolysis hydrogen production system and water electrolysis hydrogen production system

Abstract

This application discloses a control method, apparatus, and system for a water electrolysis hydrogen production system, belonging to the field of water electrolysis hydrogen production technology. The control method for the water electrolysis hydrogen production system includes: acquiring operating parameter information of the water electrolysis hydrogen production system; determining a primary water replenishment flow rate based on the operating parameter information; replenishing water to the water electrolysis hydrogen production system according to the primary water replenishment flow rate; acquiring electrolyte parameter information of the water electrolysis hydrogen production system; and adjusting the actual water replenishment flow rate based on the electrolyte parameter information, until the electrolyte parameter information matches the target parameter information. Through the above two-step water replenishment design, preliminary and precise water replenishment of the entire water electrolysis hydrogen production system is achieved, effectively solving the problem of intermittent water replenishment and enabling real-time water replenishment based on the operating status of the apparatus, making the entire hydrogen production system more stable and improving its operating efficiency.

Description

Technical Field

[0001] This application belongs to the field of electrolytic hydrogen production technology, and particularly relates to a control method, apparatus and system for electrolytic water hydrogen production. Background Technology

[0002] In the process of producing hydrogen by electrolysis of water, as the electrolysis process continuously consumes water, it is necessary to replenish water to the device periodically. In related technologies, the hydrogen production device replenishes water when the liquid level of the separator reaches a certain low level, and stops replenishing water after the liquid level of the separator reaches a certain value. That is, the water replenishment process of the hydrogen production device is intermittent.

[0003] However, the intermittent water replenishment mentioned above will cause fluctuations in the concentration of alkali solution in the device, which in turn will cause fluctuations in the energy consumption of the electrolyzer. In addition, intermittent water replenishment will prevent the liquid phase inside the scrubber from being renewed in a timely manner, resulting in poor washing effect and affecting the quality of the gas. Moreover, changes in the liquid level of the separator will also cause changes in the system pressure. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a control method, apparatus, and system for an electrolytic water hydrogen production system, effectively solving the problem of intermittent water replenishment, making the entire hydrogen production system more stable, and improving the overall operating efficiency of the hydrogen production system.

[0005] In a first aspect, this application provides a control method for a water electrolysis hydrogen production system, the method comprising:

[0006] Obtain the operating parameter information of the water electrolysis hydrogen production system;

[0007] Based on the aforementioned operating parameter information, the primary water supply flow rate is determined;

[0008] Water is supplied to the water electrolysis hydrogen production system at the first-level water replenishment flow rate;

[0009] Obtain the electrolyte parameter information of the water electrolysis hydrogen production system;

[0010] Based on the electrolyte parameter information, the actual water replenishment flow rate is adjusted from the first-stage water replenishment flow rate until the electrolyte parameter information matches the target parameter information.

[0011] According to the control method of the water electrolysis hydrogen production system of this application, the above-mentioned two-step water replenishment design realizes the initial water replenishment and precise water replenishment of the entire water electrolysis hydrogen production system, effectively solving the problem of intermittent water replenishment of the system, and enabling real-time water replenishment according to the operating status of the device, making the entire hydrogen production system more stable and improving the operating efficiency of the entire hydrogen production system.

[0012] According to one embodiment of this application, determining the primary water supply flow rate based on the operating parameter information includes:

[0013] The theoretical makeup water flow rate is determined based on the current of the electrolyzer, the number of cells in the electrolyzer, and the current efficiency of the water electrolysis hydrogen production system.

[0014] Based on the theoretical water replenishment flow rate and the target coefficient, the first-stage water replenishment flow rate is determined.

[0015] According to one embodiment of this application, the control method for the water electrolysis hydrogen production system further includes:

[0016] Obtain the density information of the electrolyte at the target location;

[0017] Adjust the liquid phase outlet flow rate of at least one of the hydrogen separator and oxygen separator based on the density information.

[0018] According to one embodiment of this application, the electrolyte parameter information includes: the hydrogen-oxygen separator level difference and the hydrogen separator level;

[0019] The step of adjusting the actual water supply flow rate based on the electrolyte parameter information, until the electrolyte parameter information matches the target parameter information, includes:

[0020] If the liquid level difference between the hydrogen and oxygen separators is less than the target difference, the additional water supply flow rate is adjusted based on the liquid level of the hydrogen separator and the target liquid level value, until the liquid level of the hydrogen separator and the target liquid level value are matched.

[0021] According to one embodiment of this application, the electrolyte parameter information includes: the density information of the electrolyte at the target location;

[0022] The step of adjusting the actual water supply flow rate based on the electrolyte parameter information, until the electrolyte parameter information matches the target parameter information, includes:

[0023] If the density information is less than the target density, reduce the additional water supply flow rate based on the first-level water supply flow rate until the density information matches the target density.

[0024] If the density information is greater than the target density, the additional water supply flow rate is increased based on the first-level water supply flow rate until the density information matches the target density.

[0025] According to one embodiment of this application, replenishing water to the electrolytic water hydrogen production system at the first-stage replenishment flow rate includes: replenishing water to the scrubber of the electrolytic water hydrogen production system through a first channel at the first-stage replenishment flow rate;

[0026] Adjusting the actual water supply flow rate based on the first-level water supply flow rate includes: while keeping the flow rate of the first channel unchanged, supplying water to the scrubber of the water electrolysis hydrogen production system through the second channel.

[0027] According to one embodiment of this application, replenishing water to the electrolytic water hydrogen production system at the first-stage replenishment flow rate includes: replenishing water to the scrubber of the electrolytic water hydrogen production system through a first channel at the first-stage replenishment flow rate;

[0028] Adjusting the actual water supply flow rate based on the first-level water supply flow rate includes: while keeping the flow rate of the first channel unchanged, supplying water to the electrolyte circulation pump of the water electrolysis hydrogen production system through the second channel.

[0029] According to one embodiment of this application, replenishing water to the electrolytic water hydrogen production system according to the first-level replenishment flow rate includes: controlling the variable frequency pump to operate at a first operating frequency to replenish water to the scrubber of the electrolytic water hydrogen production system according to the first-level replenishment flow rate;

[0030] Adjusting the actual water supply flow rate based on the first-level water supply flow rate includes: controlling the variable frequency pump to operate at a second operating frequency to adjust the actual water supply flow rate based on the first-level water supply flow rate.

[0031] Secondly, this application provides a control device for a water electrolysis hydrogen production system, the device comprising:

[0032] The first acquisition module is used to acquire the operating parameter information of the water electrolysis hydrogen production system;

[0033] The processing module is used to determine the primary water supply flow rate based on the aforementioned operating parameter information;

[0034] The first control module is used to replenish water to the water electrolysis hydrogen production system according to the first-level water replenishment flow rate;

[0035] The second acquisition module is used to acquire electrolyte parameter information of the water electrolysis hydrogen production system.

[0036] According to the control device of the water electrolysis hydrogen production system of this application, the above-mentioned two-step water replenishment design realizes the initial water replenishment and precise water replenishment of the entire water electrolysis hydrogen production system, effectively solving the problem of intermittent water replenishment of the system, and can replenish water in real time according to the operating status of the device, making the entire hydrogen production system more stable and improving the operating efficiency of the entire hydrogen production system.

[0037] According to one embodiment of this application, the processing module is further configured to:

[0038] The theoretical makeup water flow rate is determined based on the current of the electrolyzer, the number of cells in the electrolyzer, and the current efficiency of the water electrolysis hydrogen production system.

[0039] Based on the theoretical water replenishment flow rate and the target coefficient, the first-stage water replenishment flow rate is determined.

[0040] According to one embodiment of this application, the first acquisition module is further configured to: acquire the density information of the electrolyte at the target location; the first control module is further configured to: adjust the liquid phase outlet flow rate of at least one of the hydrogen separator and the oxygen separator based on the density information.

[0041] According to one embodiment of this application, the electrolyte parameter information includes: the hydrogen-oxygen separator level difference and the hydrogen separator level;

[0042] The second control module is also used for:

[0043] If the liquid level difference between the hydrogen and oxygen separators is less than the target difference, the additional water supply flow rate is adjusted based on the liquid level of the hydrogen separator and the target liquid level value, until the liquid level of the hydrogen separator and the target liquid level value are matched.

[0044] According to one embodiment of this application, the electrolyte parameter information includes: the density information of the electrolyte at the target location;

[0045] The second control module is also used for:

[0046] If the density information is less than the target density, reduce the additional water supply flow rate based on the first-level water supply flow rate until the density information matches the target density.

[0047] If the density information is greater than the target density, the additional water supply flow rate is increased based on the first-level water supply flow rate until the density information matches the target density.

[0048] According to one embodiment of this application, the first control module is further configured to: replenish water to the scrubber of the water electrolysis hydrogen production system through the first channel at the first-level water replenishment flow rate; the second control module is further configured to: replenish water to the scrubber of the water electrolysis hydrogen production system through the second channel while keeping the flow rate of the first channel constant.

[0049] According to one embodiment of this application, the first control module is further configured to: replenish water to the scrubber of the water electrolysis hydrogen production system through the first channel at the first-level replenishment flow rate; the second control module is further configured to: replenish water to the electrolyte circulation pump of the water electrolysis hydrogen production system through the second channel while keeping the flow rate of the first channel constant.

[0050] According to one embodiment of this application, the first control module is further configured to: control the variable frequency pump to operate at a first operating frequency to replenish water to the scrubber of the water electrolysis hydrogen production system according to the first-level replenishment flow rate; the second control module is further configured to: control the variable frequency pump to operate at a second operating frequency to adjust the actual replenishment flow rate based on the first-level replenishment flow rate.

[0051] Thirdly, this application provides an electronic device for producing hydrogen through water electrolysis, the system comprising:

[0052] An electrolyte circulation loop is provided, which includes an electrolytic cell, a hydrogen separator, an oxygen separator, a hydrogen scrubber, an oxygen scrubber, and an electrolyte circulation pump.

[0053] The sensor is used to collect electrolyte parameter information;

[0054] A water replenishment device, which is connected to the electrolyte circulation loop;

[0055] As described above, the control device is electrically connected to the electrolytic cell, the sensor, and the water replenishment device.

[0056] According to one embodiment of this application, the water replenishment device includes a first channel and a second channel connected in parallel. The first channel is provided with a first pure water regulating valve and a pure water flow meter, and the second channel is provided with a second pure water regulating valve. The water replenishment device is connected to the hydrogen scrubber and the oxygen scrubber respectively through the first water replenishment switch valve and the second water replenishment switch valve.

[0057] The sensor includes a level difference sensor for collecting the liquid level difference in the hydrogen-oxygen separator and a first level sensor for collecting the liquid level in the hydrogen separator.

[0058] According to one embodiment of this application, the water replenishment device includes a first channel and a second channel connected in parallel. The first channel is provided with a first pure water regulating valve and a pure water flow meter, and the second channel is provided with a second pure water regulating valve. The water replenishment device is connected to the hydrogen scrubber and the oxygen scrubber respectively through the first water replenishment switch valve and the second water replenishment switch valve.

[0059] At least one of the liquid phase outlets of the hydrogen scrubber and the oxygen scrubber is provided with a third pure water regulating valve.

[0060] The sensor includes a densitometer for collecting density information of the electrolyte at the outlet of the electrolyte circulation pump.

[0061] According to one embodiment of this application, the water replenishment device includes a first channel and a second channel. The first channel is provided with a first pure water regulating valve and a pure water flow meter, and the second channel is provided with a second pure water regulating valve. The first channel is connected to the hydrogen scrubber and the oxygen scrubber through a first water replenishment switch valve and a second water replenishment switch valve, respectively. The second channel is connected to the inlet of the electrolyte circulation pump.

[0062] The sensor includes a densitometer for collecting density information of the electrolyte at the outlet of the electrolyte circulation pump.

[0063] According to one embodiment of this application, the water replenishment device includes a variable frequency pump, which is connected to the hydrogen scrubber and the oxygen scrubber via a first water replenishment switch valve and a second water replenishment switch valve, respectively.

[0064] The sensor includes a level difference sensor for collecting the liquid level difference in the hydrogen-oxygen separator and a first level sensor for collecting the liquid level in the hydrogen separator.

[0065] Fourthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method for the water electrolysis hydrogen production system as described in the first aspect above.

[0066] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the control method of the water electrolysis hydrogen production system as described in the first aspect.

[0067] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the control method for the water electrolysis hydrogen production system as described in the first aspect above.

[0068] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0069] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0070] Figure 1 This is one of the flowcharts illustrating the control method of the water electrolysis hydrogen production system provided in the embodiments of this application;

[0071] Figure 2 This is one of the structural schematic diagrams of the water electrolysis hydrogen production system provided in the embodiments of this application;

[0072] Figure 3 This is the second schematic diagram of the structure of the water electrolysis hydrogen production system provided in the embodiments of this application;

[0073] Figure 4 This is the third schematic diagram of the structure of the water electrolysis hydrogen production system provided in the embodiments of this application;

[0074] Figure 5 This is the fourth schematic diagram of the water electrolysis hydrogen production system provided in the embodiments of this application;

[0075] Figure 6 This is a schematic diagram of the control device of the water electrolysis hydrogen production system provided in the embodiments of this application.

[0076] Figure label:

[0077] The water electrolysis hydrogen production system 200 includes a first water supply switch valve 201, a second water supply switch valve 202, a liquid level difference sensor 203, a first liquid level sensor 204, a second liquid level sensor 205, a density meter 206, an electrolyzer 210, a hydrogen separator 220, an oxygen separator 230, a hydrogen scrubber 240, an oxygen scrubber 250, an electrolyte circulation pump 260, an electrolyte heat exchanger 270, a first channel 281, a first pure water regulating valve 282, a pure water flow meter 283, a second channel 284, a second pure water regulating valve 285, a frequency converter pump 286, and a third pure water regulating valve 290. Detailed Implementation

[0078] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0079] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0080] The control method, control device, system 200, and readable storage medium of the water electrolysis hydrogen production system 200 provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0081] The control method of the water electrolysis hydrogen production system 200 can be applied to the terminal, and can be executed by the hardware or software in the terminal.

[0082] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

[0083] The following embodiments describe a terminal including a display and a touch-sensitive surface. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

[0084] The control method for the water electrolysis hydrogen production system 200 provided in this application embodiment can be executed by an electronic device or a functional module or entity in an electronic device that can implement the control method for the water electrolysis hydrogen production system 200. The electronic devices mentioned in this application embodiment include, but are not limited to, mobile phones, tablets, computers, cameras, and wearable devices. The control method for the water electrolysis hydrogen production system 200 provided in this application embodiment will be described below using an electronic device as the execution subject.

[0085] like Figure 1 As shown, the control method of the water electrolysis hydrogen production system 200 includes steps 110, 120, 130, 140 and 150.

[0086] Step 110: Obtain the operating parameter information of the water electrolysis hydrogen production system 200.

[0087] The operating parameter information can be the state parameters of the water electrolysis hydrogen production system 200 during the hydrogen production process. In other words, by obtaining the operating parameter information at a certain moment, the operating power of the water electrolysis hydrogen production system 200 at the current moment can be known.

[0088] Step 120: Determine the primary water supply flow rate based on the working parameter information.

[0089] Primary water replenishment can be the initial water replenishment for the electrolytic water hydrogen production system 200. That is, the primary water replenishment flow rate can be roughly estimated based on the above operating parameter information. The primary water replenishment flow rate can be the amount of water replenished per unit time during primary water replenishment.

[0090] Step 130: Add water to the electrolysis water hydrogen production system 200 according to the first-level water replenishment flow rate.

[0091] The hydrogen production process of the water electrolysis hydrogen production system 200 is continuous, so the entire system is constantly consuming water. By determining the primary water replenishment flow rate, the water replenishment of the water electrolysis hydrogen production system 200 per unit time is made slightly greater than the consumption, thereby helping the water electrolysis hydrogen production system 200 to complete the initial water replenishment.

[0092] Step 140: Obtain electrolyte parameter information of the water electrolysis hydrogen production system 200.

[0093] Electrolyte parameter information can be detection data reflecting the state of the electrolyte. Specifically, electrolyte parameter information can include electrolyte level information, electrolyte temperature information, or electrolyte concentration information, etc.

[0094] Step 150: Based on the electrolyte parameter information, adjust the actual water supply flow rate according to the primary water supply flow rate until the electrolyte parameter information matches the target parameter information.

[0095] Understandably, the above steps can be considered as a secondary water replenishment operation, that is, precise water replenishment for the water electrolysis hydrogen production system 200. After the primary water replenishment, the water electrolysis hydrogen production system 200 is in a state of no water shortage. In order to further stabilize the pure water circulation process of the entire system, the water electrolysis hydrogen production system 200 can perform secondary water replenishment, that is, adjust the actual water replenishment flow rate according to the electrolyte parameter information, so that the replenished water and consumed water of the entire system are in a good balance.

[0096] In actual operation, the water electrolysis hydrogen production system 200 continuously produces hydrogen through electrolysis. As the electrolysis process progresses, the system continuously consumes water, requiring replenishment. This replenishment can be divided into primary and secondary replenishment. First, the operating parameters of the system 200 are obtained, and the primary replenishment flow rate is calculated based on these parameters. Initial replenishment is then performed according to this calculated flow rate. Next, the electrolyte parameters are obtained, and the actual replenishment flow rate is further adjusted based on the primary replenishment flow rate. Finally, precise replenishment is performed according to the actual flow rate until the electrolyte parameters match the target parameters, achieving dynamic equilibrium in the pure water circulation of the entire system.

[0097] The control method for the water electrolysis hydrogen production system 200 provided in this application embodiment, through the above-mentioned two-step water replenishment design, realizes the initial water replenishment and precise water replenishment of the entire water electrolysis hydrogen production system 200, effectively solves the problem of intermittent water replenishment of the system, and can replenish water in real time according to the operating status of the device, making the entire hydrogen production system more stable and improving the operating efficiency of the entire hydrogen production system.

[0098] In some embodiments, such as Figures 2-5 As shown, step 120, determining the primary water supply flow rate based on the operating parameter information, may include:

[0099] Based on the current of the electrolyzer 210 of the water electrolysis hydrogen production system 200, the number of cells in the electrolyzer 210, and the current efficiency, the theoretical makeup water flow rate is determined; based on the theoretical makeup water flow rate and the target coefficient, the first-stage makeup water flow rate is determined.

[0100] It is understood that the operating parameter information may include the current of the electrolyzer 210 of the water electrolysis hydrogen production system 200, the number of cells in the electrolyzer 210, and the current efficiency. The electrolyzer 210 may include multiple cells, each of which can carry out an independent water electrolysis reaction. Here, multiple means two or more. For example, in some embodiments, the number of cells in the electrolyzer 210 is eight. The current of the electrolyzer 210 may be the operating current of the electrolyzer 210 under the current operating conditions. The current efficiency may be the ratio of the amount of substance actually deposited or dissolved on the electrode during electrolysis to the amount of precipitation or dissolution calculated according to theory.

[0101] The theoretical water replenishment flow rate at this time is calculated to be:

[0102]

[0103] Where m is the theoretical water replenishment flow rate, n is the number of chambers in the electrolytic cell 210, I is the current in the electrolytic cell 210, and η is the current efficiency.

[0104] The target coefficient can reflect the linear relationship between the primary water supply flow and the theoretical water supply flow. That is, the primary water supply flow can be equal to the product of the theoretical water supply flow and the target coefficient. The target coefficient can be 30% to 90%. For example, in some embodiments, the target coefficient is 60%.

[0105] The control method for the water electrolysis hydrogen production system 200 provided in this application embodiment, through the design of the above-mentioned first-level water replenishment flow calculation method, realizes the initial continuous water replenishment of the water electrolysis hydrogen production system 200 according to the system operating power, making the water replenishment control more scientific and intelligent under theoretical support.

[0106] In some embodiments, such as Figures 2-5As shown, step 130, replenishing water to the water electrolysis hydrogen production system 200 according to the primary water replenishment flow rate, may include: replenishing water to one of the hydrogen scrubber 240 and oxygen scrubber 250 of the water electrolysis hydrogen production system 200 according to the primary water replenishment flow rate.

[0107] Understandably, in the case of primary water replenishment, water can be replenished to the hydrogen scrubber 240 of the water electrolysis hydrogen production system 200 at the primary water replenishment flow rate, or, in the case of primary water replenishment, water can be replenished to the oxygen scrubber 250 of the water electrolysis hydrogen production system 200 at the primary water replenishment flow rate.

[0108] In this embodiment, since the electrolyte can circulate throughout the hydrogen production system, water replenishment can be achieved by replenishing water to the oxygen scrubber 250 alone or to the hydrogen scrubber 240 alone. That is, through the system circulation, the replenished pure water can be circulated to both the oxygen side and the hydrogen side.

[0109] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment, by selecting a single-sided scrubber for water replenishment as described above, allows both the oxygen side and the hydrogen side to be replenished with pure water under the system circulation without affecting the water replenishment effect, and reduces the difficulty of controlling and adjusting the water replenishment amount.

[0110] In some embodiments, such as Figure 3 As shown, the control method for the water electrolysis hydrogen production system 200 may further include:

[0111] Obtain the density information of the electrolyte at the target location; adjust the liquid phase outlet flow rate of at least one of the hydrogen separator 220 and oxygen separator 230 based on the density information.

[0112] It should be noted that the electrolyte density information reflects the current electrolyte concentration. The electrolyte is formed by dissolving electrolyte in water. The electrolyte content in the entire hydrogen production system is fixed. When the system is short of water, the electrolyte concentration is too high, and correspondingly, the electrolyte density is also too high. When the system is over-filled with water, the electrolyte concentration is too low, and correspondingly, the electrolyte density is also too low. Specifically, by controlling the electrolyte density to reach the target density, it can be confirmed that the water volume of the entire system is sufficient. Considering that the electrolyte will be more uniform after mixing by the electrolyte circulation pump 260, the target position can be the outlet of the electrolyte circulation pump 260 of the water electrolysis hydrogen production system 200.

[0113] In actual implementation, such as Figure 3As shown, under secondary water replenishment, the electrolyte density information at the outlet of the electrolyte circulation pump 260 of the water electrolysis hydrogen production system 200 can be obtained. When the electrolyte density is greater than the target density, the liquid phase outlet flow rate of the hydrogen separator 220 or the liquid phase outlet flow rate of the oxygen separator 230 can be increased until the electrolyte density reaches the target density. When the electrolyte density is less than the target density, the liquid phase outlet flow rate of the hydrogen separator 220 or the liquid phase outlet flow rate of the oxygen separator 230 can be decreased until the electrolyte density reaches the target density.

[0114] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the above-mentioned logical design of adjusting the amount of water replenishment according to density information, further improves the secondary water replenishment by adjusting the circulation flow rate, making the secondary water replenishment more accurate, thereby reducing the probability of water replenishment accumulation caused by excessive or insufficient water replenishment.

[0115] In some embodiments, such as Figures 2-3 and Figure 5 As shown, electrolyte parameter information may include: hydrogen-oxygen separator level difference (the level difference between the hydrogen separator and the oxygen separator) and hydrogen separator 220 level.

[0116] Step 150: Based on the electrolyte parameter information, adjust the actual water supply flow rate according to the primary water supply flow rate until the electrolyte parameter information matches the target parameter information. This may include:

[0117] If the liquid level difference between the hydrogen and oxygen separators is less than the target difference, the additional water supply flow rate is adjusted based on the liquid level of the hydrogen separator 220 and the target liquid level value, until the liquid level of the hydrogen separator 220 matches the target liquid level value.

[0118] It should be noted that the actual water replenishment flow rate can be equal to the sum of the primary water replenishment flow rate and the additional water replenishment flow rate, and the target difference can be 70mm to 90mm. For example, in some embodiments, the target difference is 80mm.

[0119] In actual implementation, with Figures 2-3 and Figure 5 For example, water can be added to the hydrogen separator 220 at the first-level water replenishment flow rate to obtain the liquid level difference between the hydrogen and oxygen separators and the liquid level of the hydrogen separator 220. This process continues until the liquid level difference between the hydrogen and oxygen separators is less than the target difference value. Then, the second-level water replenishment is initiated. When the liquid level of the hydrogen separator 220 is less than the target liquid level value, the additional water replenishment flow rate can be increased until the liquid level of the hydrogen separator 220 is equivalent to the target liquid level value. When the liquid level of the hydrogen separator 220 is greater than the target liquid level value, the additional water replenishment flow rate can be decreased until the liquid level of the hydrogen separator 220 is equivalent to the target liquid level value.

[0120] Alternatively, water can be added to the oxygen separator 230 at the first-level water replenishment flow rate to obtain the liquid level difference between the hydrogen-oxygen separator and the liquid level of the oxygen separator 230. This process continues until the liquid level difference between the hydrogen-oxygen separator and the oxygen separator 230 is less than the target difference. Then, the second-level water replenishment is initiated. When the liquid level of the oxygen separator 230 is less than the target liquid level, the additional water replenishment flow rate can be increased until the liquid level of the oxygen separator 230 is equivalent to the target liquid level. When the liquid level of the oxygen separator 230 is greater than the target liquid level, the additional water replenishment flow rate can be decreased until the liquid level of the oxygen separator 230 is equivalent to the target liquid level.

[0121] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment achieves the purpose of precise water replenishment through the above-mentioned logical design of adjusting the water replenishment amount according to the liquid level difference information and liquid level information, thereby reducing the probability of water replenishment accumulation due to excessive or insufficient water replenishment.

[0122] In some embodiments, such as Figure 4 As shown, electrolyte parameter information may include: electrolyte density information at the target location.

[0123] Step 150: Based on the electrolyte parameter information, adjust the actual water supply flow rate according to the primary water supply flow rate until the electrolyte parameter information matches the target parameter information. This may include:

[0124] If the density information is less than the target density, reduce the additional water supply flow rate based on the primary water supply flow rate until the density information matches the target density; if the density information is greater than the target density, increase the additional water supply flow rate based on the primary water supply flow rate until the density information matches the target density.

[0125] It should be noted that the actual water replenishment flow rate can be equal to the sum of the primary water replenishment flow rate and the additional water replenishment flow rate.

[0126] In actual operation, when the water electrolysis hydrogen production system 200 is undergoing secondary water replenishment, the density information of the electrolyte at the outlet of the electrolyte circulation pump 260 can be obtained. When the electrolyte density is less than the target density, the additional water replenishment flow rate can be reduced until the electrolyte density is equivalent to the target density; when the electrolyte density is greater than the target density, the additional water replenishment flow rate can be increased until the electrolyte density is equivalent to the target density.

[0127] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the above-mentioned logical design of adjusting the amount of water replenishment according to density information, achieves a stable density value of the electrolyte at the inlet of the electrolyzer 210, alleviates the phenomenon that the fluctuation of electrolyte density leads to an increase in the operating energy consumption of the electrolyzer 210, and plays a role in reducing the operating energy consumption of the electrolyzer 210.

[0128] In some embodiments, such as Figures 2-3As shown, step 130, replenishing water to the electrolysis hydrogen production system 200 at the first-level replenishment flow rate, may include: replenishing water to the scrubber of the electrolysis hydrogen production system 200 at the first-level replenishment flow rate through the first channel 281.

[0129] Step 150: Adjust the actual water supply flow rate based on the primary water supply flow rate. This may include: while keeping the flow rate of the first channel 281 unchanged, supplying water to the scrubber of the water electrolysis hydrogen production system 200 through the second channel 284.

[0130] In this embodiment, such as Figures 2-3 As shown, the water electrolysis hydrogen production system 200 can first be replenished with water, that is, water can be added to the hydrogen scrubber 240 through the first channel 281 at the first-level water replenishment flow rate. After the first-level water replenishment is completed, the water electrolysis hydrogen production system 200 can be replenished with water in the second stage, that is, water can be added to the hydrogen scrubber 240 through the second channel 284 at the additional water replenishment flow rate, until the electrolyte parameter information matches the target parameter information, that is, the pure water circulation of the entire system reaches dynamic equilibrium.

[0131] Alternatively, the water electrolysis hydrogen production system 200 can be replenished with water first, that is, water can be added to the oxygen scrubber 250 through the first channel 281 at the first-level water replenishment flow rate. After the first-level water replenishment is completed, the water electrolysis hydrogen production system 200 can be replenished with water second, that is, water can be added to the oxygen scrubber 250 through the second channel 284 at the additional water replenishment flow rate, until the electrolyte parameter information matches the target parameter information, that is, the pure water circulation of the entire system reaches dynamic equilibrium.

[0132] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned water replenishment object, enables the primary water replenishment and secondary water replenishment to replenish the scrubber through the first channel 281 and the second channel 284 respectively, maintaining the electrolyte concentration of the scrubbing liquid in the scrubber at a low level, and ensuring that the hydrogen and oxygen after washing contain less electrolyte.

[0133] In some embodiments, such as Figure 4 As shown, step 130, replenishing water to the electrolysis hydrogen production system 200 at the first-level replenishment flow rate, may include: replenishing water to the scrubber of the electrolysis hydrogen production system 200 at the first-level replenishment flow rate through the first channel 281.

[0134] Step 150: Adjust the actual water supply flow rate based on the primary water supply flow rate. This may include: while keeping the flow rate of the first channel 281 unchanged, supplying water to the electrolyte circulation pump 260 of the water electrolysis hydrogen production system 200 through the second channel 284.

[0135] In this embodiment, such as Figure 4As shown, the water electrolysis hydrogen production system 200 can first be replenished with water, that is, water can be added to the hydrogen scrubber 240 through the first channel 281 at the first-level water replenishment flow rate. After the first-level water replenishment is completed, the water electrolysis hydrogen production system 200 can be replenished with water in the second stage, that is, water can be added to the electrolyte circulation pump 260 through the second channel 284 at the additional water replenishment flow rate, until the electrolyte parameter information matches the target parameter information, that is, the pure water circulation of the entire system reaches dynamic equilibrium.

[0136] Alternatively, the water electrolysis hydrogen production system 200 can be replenished with water first, that is, water can be added to the oxygen scrubber 250 through the first channel 281 at the first-level water replenishment flow rate. After the first-level water replenishment is completed, the water electrolysis hydrogen production system 200 can be replenished with water second, that is, water can be added to the electrolyte circulation pump 260 through the second channel 284 at the additional water replenishment flow rate, until the electrolyte parameter information matches the target parameter information, that is, the pure water circulation of the entire system reaches dynamic equilibrium.

[0137] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned water replenishment objects, enables primary water replenishment and secondary water replenishment to the scrubber and electrolyte circulation pump 260 respectively, so that the liquid phase inside the scrubber is continuously renewed, improving the scrubbing effect of the scrubber, and at the same time helping the replenished pure water to circulate into the entire system more quickly, thereby increasing the water replenishment circulation rate.

[0138] In some embodiments, such as Figure 5 As shown, step 130, replenishing water to the electrolytic water hydrogen production system 200 according to the first-level replenishment flow rate, may include: controlling the variable frequency pump 286 to operate at a first operating frequency to replenish water to the scrubber of the electrolytic water hydrogen production system 200 according to the first-level replenishment flow rate.

[0139] Step 150: Adjusting the actual water supply flow rate based on the primary water supply flow rate may include: controlling the variable frequency pump 286 to operate at a second operating frequency to adjust the actual water supply flow rate based on the primary water supply flow rate.

[0140] It is understood that by controlling the operating frequency of the variable frequency pump 286, the actual water replenishment flow rate can be adjusted. The operating frequency can be set with an upper limit and a lower limit. Specifically, the upper limit of the first operating frequency and the second operating frequency can be 105% to 200% of the theoretical water replenishment volume, and the lower limit of the first operating frequency and the second operating frequency can be 5% to 99% of the theoretical water replenishment volume. For example, in some embodiments, the first operating frequency is 80% of the theoretical water replenishment volume, and the second operating frequency is 150% of the theoretical water replenishment volume.

[0141] In this embodiment, such as Figure 5As shown, the electrolytic water hydrogen production system 200 can first be replenished with water, that is, the variable frequency pump 286 is controlled to replenish the hydrogen scrubber 240 with water at the first working frequency. After the first water replenishment is completed, the electrolytic water hydrogen production system 200 can be replenished with water, that is, the variable frequency pump 286 is controlled to replenish the hydrogen scrubber 240 with water at the second working frequency, until the electrolyte parameter information matches the target parameter information, that is, the pure water circulation of the entire system reaches dynamic equilibrium.

[0142] Alternatively, the electrolytic water hydrogen production system 200 can first be replenished with water, that is, the variable frequency pump 286 can be controlled to replenish the oxygen scrubber 250 with water at the first working frequency. After the first water replenishment is completed, the electrolytic water hydrogen production system 200 can be replenished with water, that is, the variable frequency pump 286 can be controlled to replenish the oxygen scrubber 250 with water at the second working frequency, until the electrolyte parameter information matches the target parameter information, that is, the pure water circulation of the entire system reaches dynamic equilibrium.

[0143] The control method of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned water replenishment object, enables the primary water replenishment and secondary water replenishment to replenish the scrubber, and the liquid phase inside the scrubber is continuously renewed, thereby improving the washing effect of the scrubber. At the same time, the use of a variable frequency pump 286 to control the water replenishment volume can realize the continuous water replenishment function without adding pipeline equipment.

[0144] The control method for the water electrolysis hydrogen production system 200 provided in this application embodiment can be executed by the control device of the water electrolysis hydrogen production system 200. This application embodiment uses the control device of the water electrolysis hydrogen production system 200 executing the control method as an example to illustrate the control device of the water electrolysis hydrogen production system 200 provided in this application embodiment.

[0145] This application also provides a control device for an electrolytic water hydrogen production system 200.

[0146] like Figure 6 As shown, the control device of the water electrolysis hydrogen production system 200 includes: a first acquisition module 610, a processing module 620, a first control module 630, a second acquisition module 640, and a second control module 650.

[0147] The first acquisition module 610 is used to acquire the operating parameter information of the water electrolysis hydrogen production system 200;

[0148] Processing module 620 is used to determine the primary water supply flow rate based on operating parameter information;

[0149] The first control module 630 is used to replenish water to the water electrolysis hydrogen production system 200 according to the first-level water replenishment flow rate;

[0150] The second acquisition module 640 is used to acquire electrolyte parameter information of the water electrolysis hydrogen production system 200;

[0151] The second control module 650 is used to adjust the actual water replenishment flow rate based on the electrolyte parameter information and the primary water replenishment flow rate, until the electrolyte parameter information matches the target parameter information.

[0152] According to the control device of the water electrolysis hydrogen production system 200 provided in the embodiments of this application, the above-mentioned two-step water replenishment design realizes the initial water replenishment and precise water replenishment of the entire water electrolysis hydrogen production system 200, effectively solving the problem of intermittent water replenishment of the system, and can replenish water in real time according to the operating status of the device, making the entire hydrogen production system more stable and improving the operating efficiency of the entire hydrogen production system.

[0153] In some embodiments, the processing module 620 can also be used for:

[0154] Based on the current of the electrolyzer 210 of the water electrolysis hydrogen production system 200, the number of cells in the electrolyzer 210, and the current efficiency, the theoretical makeup water flow rate is determined; based on the theoretical makeup water flow rate and the target coefficient, the first-stage makeup water flow rate is determined.

[0155] According to the control device of the water electrolysis hydrogen production system 200 provided in the embodiments of this application, through the design of the above-mentioned primary water replenishment flow calculation method, the water electrolysis hydrogen production system 200 is initially continuously replenished with water according to the system operating power, making the water replenishment control more scientific and intelligent under theoretical support.

[0156] In some embodiments, the first acquisition module can also be used to: acquire the density information of the electrolyte at the target location; the first control module can also be used to: adjust the liquid phase outlet flow rate of at least one of the hydrogen separator 220 and the oxygen separator 230 based on the density information.

[0157] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the above-mentioned logical design of adjusting the amount of water replenishment according to density information, further improves the secondary water replenishment by adjusting the circulation flow rate, making the secondary water replenishment more accurate, thereby reducing the probability of water replenishment accumulation caused by excessive or insufficient water replenishment.

[0158] In some embodiments, electrolyte parameter information includes: hydrogen-oxygen separator level difference and hydrogen separator 220 level;

[0159] The second control module 650 can also be used for:

[0160] If the liquid level difference between the hydrogen and oxygen separators is less than the target difference, the additional water supply flow rate is adjusted based on the liquid level of the hydrogen separator 220 and the target liquid level value, until the liquid level of the hydrogen separator 220 matches the target liquid level value.

[0161] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment achieves the purpose of precise water replenishment through the above-mentioned logical design of adjusting the water replenishment amount according to the liquid level difference information and liquid level information, thereby reducing the probability of water replenishment accumulation caused by excessive or insufficient water replenishment.

[0162] In some embodiments, the electrolyte parameter information includes: the density information of the electrolyte at the target location;

[0163] The second control module 650 can also be used for:

[0164] If the density information is less than the target density, reduce the additional water supply flow rate based on the primary water supply flow rate until the density information matches the target density; if the density information is greater than the target density, increase the additional water supply flow rate based on the primary water supply flow rate until the density information matches the target density.

[0165] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the above-mentioned logical design of adjusting the amount of water replenishment according to density information, realizes the stability of the density value of the electrolyte at the inlet of the electrolyzer 210, alleviates the phenomenon that the fluctuation of electrolyte density leads to an increase in the operating energy consumption of the electrolyzer 210, and plays a role in reducing the operating energy consumption of the electrolyzer 210.

[0166] In some embodiments, the first control module 630 can also be used to: replenish water to the scrubber of the water electrolysis hydrogen production system 200 through the first channel 281 at a first-level replenishment flow rate; the second control module 650 can also be used to: replenish water to the scrubber of the water electrolysis hydrogen production system 200 through the second channel 284 while keeping the flow rate of the first channel 281 constant.

[0167] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned water replenishment object, enables primary water replenishment and secondary water replenishment to replenish the scrubber through the first channel 281 and the second channel 284 respectively, maintaining the electrolyte concentration of the washing liquid in the scrubber at a low level, and ensuring that the hydrogen and oxygen after washing contain less electrolyte.

[0168] In some embodiments, the first control module 630 can also be used to: replenish water to the scrubber of the water electrolysis hydrogen production system 200 through the first channel 281 at a first-level replenishment flow rate; the second control module 650 can also be used to: replenish water to the electrolyte circulation pump 260 of the water electrolysis hydrogen production system 200 through the second channel 284 while keeping the flow rate of the first channel 281 constant.

[0169] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned water replenishment object, enables primary water replenishment and secondary water replenishment to the scrubber and electrolyte circulation pump 260 respectively. The liquid phase inside the scrubber is continuously renewed, improving the scrubbing effect of the scrubber. At the same time, it helps the replenished pure water to circulate more quickly into the entire system, increasing the water replenishment circulation rate.

[0170] In some embodiments, the first control module 630 can also be used to: control the variable frequency pump 286 to operate at a first operating frequency to replenish water to the scrubber of the water electrolysis hydrogen production system 200 according to the first-level replenishment flow rate; the second control module 650 can also be used to: control the variable frequency pump 286 to operate at a second operating frequency to adjust the actual replenishment flow rate based on the first-level replenishment flow rate.

[0171] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned water replenishment object, enables the primary water replenishment and secondary water replenishment to replenish the scrubber, and the liquid phase inside the scrubber is continuously renewed, thereby improving the washing effect of the scrubber. At the same time, the use of a variable frequency pump 286 to control the water replenishment volume can realize the continuous water replenishment function without adding pipeline equipment.

[0172] The control device of the water electrolysis hydrogen production system 200 in this application embodiment can be an electronic device or a component of an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the scope of the device.

[0173] The control device of the water electrolysis hydrogen production system 200 in this embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems; this embodiment does not specifically limit the specific operating system.

[0174] The control device of the water electrolysis hydrogen production system 200 provided in this application embodiment can realize Figure 1 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0175] This application also discloses a water electrolysis hydrogen production system 200.

[0176] In some embodiments, such as Figures 2-5 As shown, the water electrolysis hydrogen production system 200 includes: an electrolyte circulation loop, a sensor, a water replenishment device, and a control device as described above.

[0177] The electrolyte circulation loop is equipped with an electrolytic cell 210, a hydrogen separator 220, an oxygen separator 230, a hydrogen scrubber 240, an oxygen scrubber 250, and an electrolyte circulation pump 260; sensors are used to collect electrolyte parameter information; a water replenishment device is connected to the electrolyte circulation loop; and a control device is electrically connected to the electrolytic cell 210, the sensors, and the water replenishment device.

[0178] In actual implementation, the hydrogen production process can be achieved as follows: the mixture of hydrogen and electrolyte produced by the electrolysis reaction in electrolyzer 210, as well as the mixture of oxygen and electrolyte, enter hydrogen separator 220 and oxygen separator 230 respectively. The separated liquid phase flows out from the bottom of hydrogen separator 220 and oxygen separator 230 and merges into electrolyte circulation pump 260, then enters electrolyte heat exchanger 270 for heat exchange, and finally returns to electrolyzer 210; while the separated gas phase enters hydrogen scrubber 240 and oxygen scrubber 250 respectively, finally producing crude hydrogen and crude oxygen.

[0179] The water replenishment process can be achieved as follows: the control device can control the water replenishment device to perform primary water replenishment to the electrolyte circulation loop according to the working parameter information. The sensor collects the electrolyte parameter information and feeds it back to the control device. The control device can then control the water replenishment device to perform secondary water replenishment to the electrolyte circulation loop according to the electrolyte parameter information. When the water replenishment device replenishes water to the scrubber, the gas will come into contact with the pure water entering the scrubber for washing. The washed liquid phase overflows back to the corresponding separator to maintain the liquid level inside the separator.

[0180] The water electrolysis hydrogen production system 200 provided in this application embodiment, through the setting of the above-mentioned control device, continuously replenishes water to the water electrolysis hydrogen production system 200, maintains the electrolyte concentration in the washing liquid of the hydrogen scrubber 240 and oxygen scrubber 250 at a low level, and ensures that the hydrogen and oxygen after washing contain less electrolyte; at the same time, it maintains the stability of the liquid level of the hydrogen separator 220 and oxygen separator 230, reducing the risk of hydrogen and oxygen cross-contamination.

[0181] In some embodiments, such as Figure 2 As shown, the water replenishment device may include a first channel 281 and a second channel 284 connected in parallel. The first channel 281 may be equipped with a first pure water regulating valve 282 and a pure water flow meter 283. The second channel 284 may be equipped with a second pure water regulating valve 285. The water replenishment device may be connected to the hydrogen scrubber 240 and the oxygen scrubber 250 respectively through the first water replenishment switch valve 201 and the second water replenishment switch valve 202. The sensor may include a liquid level difference sensor 203 for collecting the liquid level difference of the hydrogen-oxygen separator and a first liquid level sensor 204 for collecting the liquid level of the hydrogen separator 220.

[0182] The water replenishment process can be achieved in the following way: The water replenishment process can be mainly divided into primary water replenishment and secondary water replenishment. Taking hydrogen-side water replenishment as an example, the primary water replenishment process is carried out first. The control device can calculate the theoretical water replenishment volume according to the working parameter information. Any 100% of the theoretical water replenishment volume within the range of 30% to 90% is the primary water replenishment flow rate. The primary water replenishment flow rate is fed back to the pure water flow meter 283. By adjusting the first pure water regulating valve 282, the pure water flow meter 283 reaches the primary water replenishment flow rate, and the first water replenishment switch valve 201 is opened to continuously replenish water to the hydrogen scrubber 240 through the first channel 281.

[0183] The next step is the secondary water replenishment process. The liquid level difference sensor 203 can acquire the liquid level difference information of the hydrogen-oxygen separator and feed it back to the control device. The first liquid level sensor 204 can acquire the liquid level information of the hydrogen separator 220 and feed it back to the control device. The control device can feed back the liquid level difference of the hydrogen-oxygen separator, the liquid level of the hydrogen separator 220, and the target liquid level value to the second pure water regulating valve 285. When the liquid level difference of the hydrogen-oxygen separator is less than the target difference value, and when the liquid level of the hydrogen separator 220 is less than the target liquid level value, the opening of the second pure water regulating valve 285 is increased and water is replenished to the hydrogen scrubber 240 through the second channel 284 to raise the liquid level of the hydrogen separator 220 to the target liquid level value. If the liquid level of the hydrogen separator 220 is greater than the target liquid level value, the opening of the second pure water regulating valve 285 is decreased to lower the liquid level of the hydrogen separator 220 to the target liquid level value. After the openings of the first pure water regulating valve 282 and the second pure water regulating valve 285 reach a stable state, the water replenishment system reaches a stable state.

[0184] It should be noted that the sensor may also include a second liquid level sensor 205, which can be used to collect the liquid level of the oxygen separator 230. When the water supply device supplies water to the oxygen separator 230, the second water supply switch valve 202 can be opened. The oxygen side water supply corresponds to the hydrogen side water supply, which will not be described in detail here.

[0185] The electrolytic water hydrogen production system 200 provided in this application embodiment achieves continuous water replenishment on the original hydrogen production device through the above-mentioned two-step water replenishment logic design, and can replenish water in real time according to the separator liquid level, ensuring that the hydrogen production system is more stable and improving the operating efficiency of the entire system.

[0186] In some embodiments, such as Figure 3As shown, the water replenishment device may include a first channel 281 and a second channel 284 connected in parallel. The first channel 281 may be equipped with a first pure water regulating valve 282 and a pure water flow meter 283. The second channel 284 may be equipped with a second pure water regulating valve 285. The water replenishment device may be connected to the hydrogen scrubber 240 and the oxygen scrubber 250 respectively through the first water replenishment switch valve 201 and the second water replenishment switch valve 202. At least one of the liquid phase outlets of the hydrogen scrubber 240 and the oxygen scrubber 250 may be equipped with a third pure water regulating valve 290. The sensor may include a density meter 206 for collecting density information of the electrolyte at the outlet of the electrolyte circulation pump 260.

[0187] The water replenishment process can be achieved in the following way: The water replenishment process can be mainly divided into primary water replenishment and secondary water replenishment. Taking hydrogen-side water replenishment as an example, the primary water replenishment process is carried out first. The control device can calculate the theoretical water replenishment volume according to the working parameter information. Any 100% of the theoretical water replenishment volume within the range of 30% to 90% is the primary water replenishment flow rate. The primary water replenishment flow rate is fed back to the pure water flow meter 283. By adjusting the first pure water regulating valve 282, the pure water flow meter 283 reaches the primary water replenishment flow rate, and the first water replenishment switch valve 201 is opened to continuously replenish water to the hydrogen scrubber 240 through the first channel 281.

[0188] The next step is the secondary water replenishment process. The level difference sensor 203 acquires the level difference information of the hydrogen-oxygen separator and feeds it back to the control device. The first level sensor 204 acquires the level information of the hydrogen separator 220 and feeds it back to the control device. The control device can feed back the hydrogen-oxygen separator level difference, the hydrogen separator 220 level, and the target level value to the second pure water regulating valve 285. When the hydrogen-oxygen separator level difference is less than the target difference, and when the hydrogen separator 220 level is less than the target level value, the opening of the second pure water regulating valve 285 is increased, and hydrogen is introduced for washing through the second channel 284. Water is added to the device 240 to raise the liquid level of the hydrogen separator 220 to the target liquid level. If the liquid level of the hydrogen separator 220 is higher than the target liquid level, the opening of the second pure water regulating valve 285 is reduced to lower the liquid level of the hydrogen separator 220 to the target liquid level. After the openings of the first pure water regulating valve 282 and the second pure water regulating valve 285 reach a stable state, the water replenishment system reaches a stable state. In addition, in order to further monitor and control the electrolyte density, the density meter 206 is adjusted to the target density by controlling the opening of the third pure water regulating valve 290. The opening of the third pure water regulating valve 290 cannot be fully closed.

[0189] The water electrolysis hydrogen production system 200 provided in this application embodiment achieves continuous water replenishment on the original hydrogen production device through the above-mentioned two-step water replenishment logic design. It can also replenish water in real time according to the electrolyte density and the separator liquid level, preventing water accumulation caused by excessive or insufficient replenishment, avoiding the increase in operating energy consumption of the electrolyzer 210 due to fluctuations in alkaline solution density, and thus reducing the operating energy consumption of the electrolyzer 210.

[0190] In some embodiments, such as Figure 4 As shown, the water replenishment device may include a first channel 281 and a second channel 284. The first channel 281 may be equipped with a first pure water regulating valve 282 and a pure water flow meter 283. The second channel 284 may be equipped with a second pure water regulating valve 285. The first channel 281 may be connected to the hydrogen scrubber 240 and the oxygen scrubber 250 respectively through the first water replenishment switch valve 201 and the second water replenishment switch valve 202. The second channel 284 may be connected to the inlet of the electrolyte circulation pump 260. The sensor may include a density meter 206 for collecting the density information of the electrolyte at the outlet of the electrolyte circulation pump 260.

[0191] The water replenishment process can be achieved in the following way: The water replenishment process can be mainly divided into primary water replenishment and secondary water replenishment. Taking hydrogen-side water replenishment as an example, the primary water replenishment process is carried out first. The control device can calculate the theoretical water replenishment volume according to the working parameter information. Any 100% of the theoretical water replenishment volume within the range of 30% to 90% is the primary water replenishment flow rate. The primary water replenishment flow rate is fed back to the pure water flow meter 283. By adjusting the first pure water regulating valve 282, the pure water flow meter 283 reaches the primary water replenishment flow rate, and the first water replenishment switch valve 201 is opened to continuously replenish water to the hydrogen scrubber 240 through the first channel 281.

[0192] The next step is the secondary water replenishment process. The densitometer 206 can obtain the density of the electrolyte at the outlet of the electrolyte circulation pump 260 and feed it back to the control device. The control device can feed back the electrolyte density and the target density to the second pure water regulating valve 285. If the electrolyte density is greater than the target density, the opening of the second pure water regulating valve 285 is increased and water is replenished to the electrolyte circulation pump 260 through the second channel 284 until the electrolyte density is equal to the target density. If the electrolyte density is less than the target density, the opening of the second pure water regulating valve 285 is decreased until the electrolyte density is equal to the target density. After the openings of the first pure water regulating valve 282 and the second pure water regulating valve 285 reach a stable state, the water replenishment system reaches a stable state.

[0193] The water electrolysis hydrogen production system 200 provided in this application embodiment achieves continuous water replenishment on the original hydrogen production device through the above-mentioned two-step water replenishment logic design, and can replenish water in real time according to the electrolyte density, avoiding the increase in operating energy consumption of the electrolyzer 210 due to the fluctuation of the alkali density, thus reducing the operating energy consumption of the electrolyzer 210. At the same time, it helps the replenished pure water to circulate more quickly into the entire system, improving the water replenishment circulation rate.

[0194] In some embodiments, such as Figure 5 As shown, the water replenishment device may include a variable frequency pump 286, which may be connected to the hydrogen scrubber 240 and the oxygen scrubber 250 via a first water replenishment switch valve 201 and a second water replenishment switch valve 202, respectively; the sensor may include a liquid level difference sensor 203 for collecting the liquid level difference of the hydrogen-oxygen separator and a first liquid level sensor 204 for collecting the liquid level of the hydrogen separator 220.

[0195] The water replenishment process can be achieved in the following way: The water replenishment process can be mainly divided into primary water replenishment and secondary water replenishment. Taking hydrogen-side water replenishment as an example, the primary water replenishment process is carried out first. The control device can calculate the theoretical water replenishment volume according to the working parameter information. Any 100% of the theoretical water replenishment volume within the range of 30% to 90% is the primary water replenishment flow rate. The primary water replenishment flow rate is fed back to the variable frequency pump 286. At this time, the control device can control the variable frequency pump 286 to work at the first working frequency and open the first water replenishment switch valve 201 to continuously replenish water to the hydrogen scrubber 240.

[0196] The next step is the secondary water replenishment process. The liquid level difference sensor 203 can acquire the liquid level difference information of the hydrogen-oxygen separator and feed it back to the control device. The first liquid level sensor 204 can acquire the liquid level information of the hydrogen separator 220 and feed it back to the control device. The control device can feed back the liquid level difference of the hydrogen-oxygen separator, the liquid level of the hydrogen separator 220, and the target liquid level value to the variable frequency pump 286. When the liquid level difference of the hydrogen-oxygen separator is less than the target difference value, and when the liquid level of the hydrogen separator 220 is less than the target liquid level value, the opening of the second pure water regulating valve 285 is increased and water is replenished to the hydrogen scrubber 240 through the second channel 284. The operating frequency of the variable frequency pump 286 is increased to the second operating frequency and water is replenished to the hydrogen scrubber 240, raising the liquid level of the hydrogen separator 220 to the target liquid level value. If the liquid level of the hydrogen separator 220 is greater than the target liquid level value, the operating frequency of the variable frequency pump 286 is decreased to the second operating frequency, lowering the liquid level of the hydrogen separator 220 to the target liquid level value.

[0197] The electrolytic water hydrogen production system 200 provided in this application embodiment achieves continuous water replenishment on the original hydrogen production device through the above-mentioned two-step water replenishment logic design, and can replenish water in real time according to the separator liquid level, ensuring that the hydrogen production system is more stable and improving the operating efficiency of the entire system. At the same time, the use of pure water variable frequency pump 286 to control the water replenishment of the hydrogen production system can achieve continuous water replenishment function without adding pipeline equipment.

[0198] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the control method embodiment of the above-described water electrolysis hydrogen production system 200 and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0199] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0200] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the control method of the above-described water electrolysis hydrogen production system 200.

[0201] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0202] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the control method embodiment of the above-described water electrolysis hydrogen production system 200, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0203] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0204] It should be noted that, in this document, 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. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0205] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0206] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0207] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0208] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for a water electrolysis hydrogen production system, characterized in that, include: Obtain the operating parameter information of the water electrolysis hydrogen production system; Based on the aforementioned operating parameter information, the primary water supply flow rate is determined; Water is supplied to the water electrolysis hydrogen production system at the first-level water replenishment flow rate; Obtain the electrolyte parameter information of the water electrolysis hydrogen production system; Based on the electrolyte parameter information, the actual water supply flow rate is adjusted from the primary water supply flow rate until the electrolyte parameter information matches the target parameter information; wherein, determining the primary water supply flow rate based on the operating parameter information includes: The theoretical makeup water flow rate is determined based on the current of the electrolyzer, the number of cells in the electrolyzer, and the current efficiency of the water electrolysis hydrogen production system. Based on the theoretical water replenishment flow rate and the target coefficient, the first-stage water replenishment flow rate is determined.

2. The control method for the water electrolysis hydrogen production system according to claim 1, characterized in that, Also includes: Obtain the density information of the electrolyte at the target location; Adjust the liquid phase outlet flow rate of at least one of the hydrogen separator and oxygen separator based on the density information.

3. The control method for the water electrolysis hydrogen production system according to claim 1, characterized in that, The electrolyte parameter information includes: the hydrogen-oxygen separator level difference and the hydrogen separator level; The step of adjusting the actual water supply flow rate based on the electrolyte parameter information, until the electrolyte parameter information matches the target parameter information, includes: If the liquid level difference between the hydrogen and oxygen separators is less than the target difference, the additional water supply flow rate is adjusted based on the liquid level of the hydrogen separator and the target liquid level value, until the liquid level of the hydrogen separator matches the target liquid level value.

4. The control method for the water electrolysis hydrogen production system according to claim 1, characterized in that, The electrolyte parameter information includes: the density information of the electrolyte at the target location; The step of adjusting the actual water supply flow rate based on the electrolyte parameter information, until the electrolyte parameter information matches the target parameter information, includes: If the density information is less than the target density, reduce the additional water supply flow rate based on the first-level water supply flow rate until the density information matches the target density. If the density information is greater than the target density, the additional water supply flow rate is increased based on the first-level water supply flow rate until the density information matches the target density.

5. The control method for the water electrolysis hydrogen production system according to any one of claims 1-4, characterized in that, The step of replenishing water to the electrolytic hydrogen production system at the first-level replenishment flow rate includes: replenishing water to the scrubber of the electrolytic hydrogen production system through the first channel at the first-level replenishment flow rate; Adjusting the actual water supply flow rate based on the first-level water supply flow rate includes: while keeping the flow rate of the first channel unchanged, supplying water to the scrubber of the water electrolysis hydrogen production system through the second channel.

6. The control method for the water electrolysis hydrogen production system according to any one of claims 1-4, characterized in that, The step of replenishing water to the electrolytic hydrogen production system at the first-level replenishment flow rate includes: replenishing water to the scrubber of the electrolytic hydrogen production system through the first channel at the first-level replenishment flow rate; Adjusting the actual water supply flow rate based on the first-level water supply flow rate includes: while keeping the flow rate of the first channel unchanged, supplying water to the electrolyte circulation pump of the water electrolysis hydrogen production system through the second channel.

7. The control method for the water electrolysis hydrogen production system according to any one of claims 1-4, characterized in that, The step of replenishing water to the electrolytic hydrogen production system according to the first-level replenishment flow rate includes: controlling the variable frequency pump to operate at a first working frequency to replenish water to the scrubber of the electrolytic hydrogen production system according to the first-level replenishment flow rate; Adjusting the actual water supply flow rate based on the first-level water supply flow rate includes: controlling the variable frequency pump to operate at a second operating frequency to adjust the actual water supply flow rate based on the first-level water supply flow rate.

8. A control device for a water electrolysis hydrogen production system, characterized in that, include: The first acquisition module is used to acquire the operating parameter information of the water electrolysis hydrogen production system; The processing module is used to determine the primary water supply flow rate based on the aforementioned operating parameter information; The first control module is used to replenish water to the water electrolysis hydrogen production system according to the first-level water replenishment flow rate; The second acquisition module is used to acquire electrolyte parameter information of the water electrolysis hydrogen production system. The second control module is used to adjust the actual water replenishment flow rate based on the electrolyte parameter information and the primary water replenishment flow rate, until the electrolyte parameter information matches the target parameter information; wherein, the processing module is further used to: Based on the current of the electrolyzer, the number of cells in the electrolyzer, and the current efficiency of the water electrolysis hydrogen production system, the theoretical makeup water flow rate is determined; based on the theoretical makeup water flow rate and the target coefficient, the first-stage makeup water flow rate is determined.

9. A water electrolysis hydrogen production system, characterized in that, include: An electrolyte circulation loop is provided, which includes an electrolytic cell, a hydrogen separator, an oxygen separator, a hydrogen scrubber, an oxygen scrubber, and an electrolyte circulation pump. The sensor is used to collect electrolyte parameter information; A water replenishment device, which is connected to the electrolyte circulation loop; The control device as described in claim 8 is electrically connected to the electrolytic cell, the sensor, and the water replenishment device.

10. The water electrolysis hydrogen production system according to claim 9, characterized in that, The water replenishment device includes a first channel and a second channel connected in parallel. The first channel is equipped with a first pure water regulating valve and a pure water flow meter, and the second channel is equipped with a second pure water regulating valve. The water replenishment device is connected to the hydrogen scrubber and the oxygen scrubber through the first water replenishment switch valve and the second water replenishment switch valve, respectively. The sensors include a level difference sensor for collecting the liquid level difference in the hydrogen-oxygen separator and a first level sensor for collecting the liquid level in the hydrogen separator.

11. The water electrolysis hydrogen production system according to claim 9, characterized in that, The water replenishment device includes a first channel and a second channel connected in parallel. The first channel is equipped with a first pure water regulating valve and a pure water flow meter, and the second channel is equipped with a second pure water regulating valve. The water replenishment device is connected to the hydrogen scrubber and the oxygen scrubber through the first water replenishment switch valve and the second water replenishment switch valve, respectively. At least one of the liquid phase outlets of the hydrogen scrubber and the oxygen scrubber is provided with a third pure water regulating valve. The sensor includes a densitometer for collecting density information of the electrolyte at the outlet of the electrolyte circulation pump.

12. The water electrolysis hydrogen production system according to claim 9, characterized in that, The water replenishment device includes a first channel and a second channel. The first channel is equipped with a first pure water regulating valve and a pure water flow meter. The second channel is equipped with a second pure water regulating valve. The first channel is connected to the hydrogen scrubber and the oxygen scrubber through a first water replenishment switch valve and a second water replenishment switch valve, respectively. The second channel is connected to the inlet of the electrolyte circulation pump. The sensor includes a densitometer for collecting density information of the electrolyte at the outlet of the electrolyte circulation pump.

13. The water electrolysis hydrogen production system according to claim 9, characterized in that, The water replenishment device includes a variable frequency pump, which is connected to the hydrogen scrubber and the oxygen scrubber via a first water replenishment switch valve and a second water replenishment switch valve, respectively. The sensors include a level difference sensor for collecting the liquid level difference in the hydrogen-oxygen separator and a first level sensor for collecting the liquid level in the hydrogen separator.

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