Method, system and electronic device for producing hydrogen by electrolysis of water, and computer storage medium

Abstract

The application provides a water electrolysis hydrogen production method, system, electronic equipment and computer storage medium. The water electrolysis hydrogen production system comprises a power generation device, a hydrogen production power supply, a controller and an electrolytic cell. The N-line output end of the hydrogen production power supply is connected with the interface of the corresponding part of the end plate in the electrolytic cell. The controller determines the target power module to be started in the hydrogen production power supply based on a target threshold range, and controls the target power module to start. Then, the target part connected with the output end of the target power module in the end plate of the electrolytic cell is determined. The target power module sends electric energy to the target part through the output end, so as to control the end plate of different parts to conduct current. When the target part in the electrolytic cell receives the electric energy, the target part performs water electrolysis hydrogen production based on the received electric energy. Since the area of the target part is small, the diaphragm area of each small chamber through which the current passes is also reduced, and the reaction area is reduced, so that the purity of hydrogen is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolysis of water, and in particular to a method and system for electrolysis of water to produce hydrogen, an electronic device and a computer storage medium. BACKGROUND

[0002] The diaphragm in the electrolytic cell for isolating hydrogen and oxygen has a certain oxygen permeability. The amount of gas permeating through the diaphragm, the pressure on both sides of the diaphragm, and the area of the diaphragm will cause oxygen to permeate, thereby affecting the hydrogen purity of the electrolysis of water to produce hydrogen system.

[0003] In the existing process of electrolysis of water to produce hydrogen, the amount of gas permeating through the diaphragm from the oxygen side to the hydrogen side per unit time is constant, and the area of the electrolytic cell where the reaction occurs is constant. When the hydrogen production power is low, the current density per unit area where the reaction occurs in the electrolytic cell decreases, which will cause the hydrogen production to decrease, and the proportion of oxygen mixed in the unit volume of hydrogen gas to increase, thereby failing to guarantee the purity of hydrogen. SUMMARY

[0004] Therefore, the embodiments of the present application provide a method and system for electrolysis of water to produce hydrogen to solve the problem that the purity of hydrogen cannot be guaranteed at low power in the prior art.

[0005] To achieve the above object, the embodiments of the present application provide the following technical solutions.

[0006] The first aspect of the embodiments of the present application shows a method for electrolysis of water to produce hydrogen, applied to an electrolysis of water to produce hydrogen system, the electrolysis of water to produce hydrogen system comprising a power generation device, a hydrogen production power supply, a controller, and an electrolytic cell. The controller is connected with the power generation device and the hydrogen production power supply respectively. The power generation device is connected with the hydrogen production power supply. The N-line output end of the hydrogen production power supply is connected with the interface of the corresponding part of the end plate of the electrolytic cell. The method comprises:

[0007] The controller acquires the output power of the power generation device;

[0008] The controller determines the target threshold range where the current output power of the power generation device is located;

[0009] The controller determines the target power module to be started in the hydrogen production power supply based on the target threshold range;

[0010] The controller controls the target power module to start;

[0011] The controller determines the target part of the end plate of the electrolytic cell connected with the output end of the target power module, so that the target power module sends the electric energy to the target part of the electrolytic cell connected with the output end through the output end;

[0012] The electrolytic tank electrolyzes water to produce hydrogen based on the electric energy received by the target part connected with the output end.

[0013] Optionally, the controller determines a target threshold range in which the current output power of the power generation device is located, including:

[0014] The controller compares whether the current output power of the power generation device is located in any initial threshold range.

[0015] If yes, the initial threshold range in which the current output power of the power generation device is located is taken as the target threshold range.

[0016] Optionally, the control includes:

[0017] The controller determines whether there is an initial threshold range smaller than the first threshold in the target threshold range among all the initial threshold ranges.

[0018] If yes, the initial threshold range is recorded.

[0019] The power supply modules corresponding to the initial threshold range and the target threshold range are determined from the hydrogen production power supply, and the power supply modules corresponding to the initial threshold range and the target threshold range are taken as the target power supply modules.

[0020] Optionally, the control further includes:

[0021] If the controller determines that the current output power of the power generation device is greater than the output power of the power generation device in the last time, the controller determines the target threshold range in which the current output power of the power generation device is located.

[0022] It is judged whether the target power supply module corresponding to the target threshold range in which the current output power is located has been started.

[0023] If not, the target power supply module corresponding to the target threshold range in which the current output power is located is controlled to start.

[0024] Optionally, the control further includes:

[0025] If the controller determines that the current output power of the power generation device is less than the output power of the power generation device in the last time, the controller determines the target threshold range in which the current output power of the power generation device is located.

[0026] If it is determined that the second threshold in the target threshold range in which the current output power is located is less than the first threshold in the target threshold range corresponding to the output power in the last time, the target power supply module to be closed is determined based on the target threshold range corresponding to the current output power.

[0027] Optionally, further comprising:

[0028] If the target threshold range corresponding to the current output power is the same as the target threshold range corresponding to the previous output power, the target power module corresponding to the target threshold range is provided with electric energy based on the current output power.

[0029] Optionally, further comprising:

[0030] After the target power module is started, the power generation device supplies power to the target power module.

[0031] Optionally, further comprising:

[0032] When it is determined that the output power of the target power module reaches the preset power of the target power module, the controller controls the target power module to send the electric energy of the preset power to the target part in the electrolytic cell connected with the output end through the output end.

[0033] The second aspect of the embodiment of the present application shows an electrolytic water hydrogen production system, which comprises a power generation device, a hydrogen production power supply, a controller, and an electrolytic cell, the controller is connected with the power generation device and the hydrogen production power supply respectively, the power generation device is connected with the hydrogen production power supply, the N-line output end of the hydrogen production power supply is connected with the interface of the corresponding part of the end plate in the electrolytic cell.

[0034] The controller is used to acquire the output power of the power generation device, determine the target threshold range in which the current output power of the power generation device is located, determine the target power module to be started in the hydrogen production power supply based on the target threshold range, control the target power module to start, and determine the target part in the end plate of the electrolytic cell connected with the output end of the target power module, so that the target power module sends the electric energy to the target part in the electrolytic cell connected with the output end through the output end.

[0035] The electrolytic cell is used to produce hydrogen by electrolyzing water based on the electric energy received by the target part connected with the output end.

[0036] The third aspect of the embodiment of the present application shows an electronic device, which is used to run a program, wherein the program performs the electrolytic water hydrogen production method shown in the first aspect of the embodiment of the present application when running.

[0037] The fourth aspect of the embodiment of the present application shows a computer storage medium, which comprises a program, wherein the device in which the storage medium is located performs the electrolytic water hydrogen production method shown in the first aspect of the embodiment of the present application when the program runs.

[0038] Based on the above-mentioned electrolytic water hydrogen production method and system, the electrolytic water hydrogen production system comprises a power generation device, a hydrogen production power supply, a controller, and an electrolytic cell, the controller is connected with the power generation device and the hydrogen production power supply respectively, the power generation device is connected with the hydrogen production power supply, the N-line output end of the hydrogen production power supply is connected with the interface of the corresponding part of the end plate in the electrolytic cell, and the method comprises the following steps: the controller acquires the output power of the power generation device; the controller determines the target threshold range of the current output power of the power generation device; the target power module to be started in the hydrogen production power supply is determined based on the target threshold range; the controller controls the target power module to start; the controller determines the target part of the end plate in the electrolytic cell connected with the output end of the target power module, so that the target power module sends the electric energy to the target part of the electrolytic cell connected with the output end through the output end; and the electrolytic cell performs electrolytic water hydrogen production based on the electric energy received by the target part connected with the output end. In the embodiment of the present application, the split end plate is adopted, the target part of the end plate for conducting electricity is determined according to the output power of the power generation device, the current of the end plate of different parts is controlled, the working power range of the electrolytic cell is effectively widened, and the adaptability to renewable energy fluctuation is improved. When the target part in the electrolytic cell receives the electric energy, the electric conduction reaction occurs. At low power, since the area of the target part is small, the diaphragm area of each small chamber through which the current passes is also reduced, the reaction area is reduced, the current density per unit area for reaction is ensured, the oxygen gas permeation rate is certain, the oxygen gas permeation amount is reduced, and the purity of hydrogen gas is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0040] Figure 1 A structure schematic diagram of an electrolytic water hydrogen production system shown in an embodiment of the present application;

[0041] Figure 2 A cross-sectional structure schematic diagram of an electrolytic cell shown in an embodiment of the present application;

[0042] Figure 3 A split schematic diagram of an end plate shown in an embodiment of the present application;

[0043] Figure 4 A flow schematic diagram of an electrolytic water hydrogen production method shown in an embodiment of the present application;

[0044] Figure 5 Another flow diagram of a method of electrolysis of water to produce hydrogen according to embodiments of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The terms "first", "second", "third", "fourth" and the like in the description of the specification and claims of the present application and the above-described drawings (if any) are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0047] It should be noted that the description involving "first", "second" and the like in the present application is only for description purpose, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0048] In the present application, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a…" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0049] Reference Figure 1A structural schematic diagram of a water electrolysis hydrogen production system is shown in an embodiment of the present application.

[0050] The water electrolysis hydrogen production system comprises a power generation device 10, a hydrogen production power supply 20, a controller 30, and an electrolytic cell 40.

[0051] The controller 30 is connected with the power generation device 10 and the hydrogen production power supply 20 through communication lines, the power generation device 10 is connected with the hydrogen production power supply 20 through power lines, and the N-line output ends of the hydrogen production power supply 20 are connected with the interfaces of the corresponding parts of the end plate in the electrolytic cell 40 through power lines.

[0052] It should be noted that the hydrogen production power supply 20 can comprise a plurality of power supply modules, each power supply module can provide the same or different electric energy, and each power supply module has one output line.

[0053] The power generation device 10 can be a renewable energy power generation device, which can be a photovoltaic power generation device and a wind power generation device, etc.

[0054] N is a positive integer greater than or equal to 2.

[0055] Based on the above Figure 1 The water electrolysis hydrogen production system shown in the embodiment of the present application also discloses the specific structure of the electrolytic cell 40, such as Figure 2 The cross-sectional view of the electrolytic cell is shown.

[0056] The electrolytic cell 40 comprises a left end pressing plate 41, a left end plate 42, an intermediate plate 43, a right end plate 44, a right end pressing plate 45, and an electrolytic cell assembly base 46 connected with the right end pressing plate 45 from left to right.

[0057] Among them, the left end pressing plate 41 and the left end plate 42 comprise an insulating plate 47, and the right end plate 44 and the right end pressing plate 45 also comprise an insulating plate 47.

[0058] Optionally, the periphery of the electrolytic cell 40 further comprises an insulating sleeve for protecting the left end pressing plate 41, the left end plate 42, the intermediate plate 43, the right end plate 44, the right end pressing plate 45, and the right end pressing plate 45.

[0059] It should be noted that the left end plate 42 and the intermediate plate 43 are assembled in an overlapping manner of one right plate and one left plate, and the right plate and the left plate are sprayed with nickel mesh, diaphragm cloth, insulating gasket and nickel mesh, and so on, until the left end plate 42 and the intermediate plate 43 are overlapped with m pieces of right plate and n pieces of left plate.

[0060] Further, it needs to be explained that the left end plate 42 and the right end plate closest to it are also sprayed with nickel mesh, diaphragm cloth, insulating gaskets and nickel mesh; the middle end plate 43 and the right end plate or the left end plate closest to it are also sprayed with nickel mesh, diaphragm cloth, insulating gaskets and nickel mesh.

[0061] m and n are positive integers greater than 0, which can be set according to experience or multiple tests, and the number of m and n can be the same or different; for example, m is 77, and n is also 77.

[0062] It needs to be explained that the middle end plate 43 and the right end plate 44 are assembled in an overlapping manner of one left end plate and one right end plate, and the left end plate and the right end plate are sprayed with nickel mesh, diaphragm cloth, insulating gaskets and nickel mesh, and so on, until the middle end plate 43 and the right end plate 44 overlap p pieces of right end plates and q pieces of left end plates.

[0063] Further, it needs to be explained that the right end plate 44 and the left end plate closest to it are also sprayed with nickel mesh, diaphragm cloth, insulating gaskets and nickel mesh.

[0064] p and q are positive integers greater than 0, which can be set according to experience or multiple tests, and the number of p and q can be the same or different; for example, p is 77, and q is also 77.

[0065] In the embodiment of the application, the number of power supply modules in the hydrogen production power supply 20 can determine the number of divided left end plates 42 and right end plates 44 in the electrolytic cell.

[0066] The experimental data refers to the hydrogen concentration data obtained by the end plate in the electrolysis water experiment under different conductive areas and different powers.

[0067] According to the number of divisions, the division method and the division size, the end plate, i.e. the left end plate 42 and the right end plate 44, is divided into parts with different conductive areas.

[0068] Each part has an interface connected to the output end of a different line of the hydrogen production power supply.

[0069] It needs to be explained that the shape of the end plate can be a cylinder or a cuboid.

[0070] The division method of the end plate includes equal length division, equal division and equal ratio division with the center of the circle as the center, as shown in Figure 3 .

[0071] It needs to be explained that the division method and the division size of the end plate are not limited to the above-mentioned method, but can also be other division methods, which are not limited by the embodiment of the application.

[0072] Based on the structure shown above, the process of electrolyzing water to produce hydrogen is implemented as follows:

[0073] The controller 30 is configured to acquire the output power of the power generation device 10.

[0074] Optionally, the power generation device 10 converts the renewable energy into electric energy to provide the hydrogen production power supply 20 with electric energy.

[0075] In an implementation, the controller 30 acquires the output power corresponding to the electric energy output by the power generation device 10 in real time.

[0076] The controller 30 is configured to determine, by the controller 30, a target threshold range in which the current output power of the power generation device 10 is located, determine, based on the target threshold range, a target power module to be started in the hydrogen production power supply 20, and control the target power module to start.

[0077] Optionally, the controller 30 determines that the output power of the power generation device 10 is located in a target threshold range, and specifically is configured to: compare whether the current output power of the power generation device 10 is located in any initial threshold range; if yes, take the initial threshold range in which the current output power of the power generation device is located as the target threshold range; and if not, reacquire the output power of the power generation device.

[0078] It should be noted that the number of initial threshold ranges is the same as the number of parts into which the end plate is divided, and the target threshold range refers to continuous values between the first threshold and the second threshold. The plurality of target threshold ranges are continuous, for example: if the value of N is 4, there are four target threshold ranges, target threshold range 1 is [a, b), that is, the first threshold a and the second threshold b are endpoints of a half-closed and half-open interval; target threshold range 2 is [b, c), that is, the first threshold b and the second threshold c are endpoints of a half-closed and half-open interval; target threshold range 3 is [c, d), that is, the first threshold c and the second threshold d are endpoints of a half-closed and half-open interval; and target threshold range 4 is [d, Q), that is, the first threshold d and the second threshold Q are endpoints of a half-closed and half-open interval; where 0 < a < b < c < d < Q, and Q is the rated power.

[0079] For example, if the end plate is divided into four parts of the same size, the number of target threshold ranges can be determined as four, and the end points a, b, c and d in each target threshold range can be set as 7.5%, 32.5%, 57.5% and 82.5% of the rated power Q of the electrolytic cell, that is, the target threshold range 1 is [7.5%Q, 32.5%Q), the target threshold range 2 is [32.5%Q, 57.5%Q), the target threshold range 3 is [57.5%Q, 82.5%Q), and the target threshold range 4 is [82.5%Q, Q).

[0080] Optionally, the controller 30 controls the target power module corresponding to the target threshold range in the hydrogen production power supply 20 to start, and is specifically used for:

[0081] determining whether there is an initial threshold range smaller than the first threshold in the target threshold range among all initial threshold ranges; if there is, recording the initial threshold range; determining the power module corresponding to the initial threshold range and the target threshold range from the hydrogen production power supply 20, and taking the power module corresponding to the initial threshold range and the target threshold range as the target power module.

[0082] In a specific implementation, the controller 30 judges whether the second threshold in the initial threshold range is smaller than or equal to the first threshold in the target threshold range for each initial threshold range, and if it is smaller than or equal to, records the initial threshold range; determines the power module corresponding to the initial threshold range from the hydrogen production power supply 20, and then determines the power module corresponding to the target threshold range from the hydrogen production power supply 20; taking the power module corresponding to the initial threshold range and the power module corresponding to the target threshold range as the target power module. If it is greater than, it is discarded.

[0083] It should be noted that the hydrogen production power supply 20 includes a plurality of power modules, and a corresponding relationship between the initial threshold range and the power module is established, and one initial threshold range corresponds to one power module.

[0084] It should be further noted that the target threshold range is a certain initial threshold range.

[0085] The controller 30 determines the target part in the end plate of the electrolytic cell 40 connected to the output end of the target power module, so that the target power module sends the electric energy to the target part in the electrolytic cell 40 connected to the output end through the output end.

[0086] It should be noted that the hydrogen production power supply 20 includes a plurality of power supply modules, and each power supply module is connected to a part of the end plate corresponding to the output end of the line, that is, each power supply module changes the area of the electrolytic water reaction by providing electric energy to the part of the end plate connected to the output end of the power supply module to make the part conduct electricity.

[0087] In a specific implementation, the controller 30 determines the target part as the part of the end plate connected to the output end of the power supply module, so that the target power supply module sends the electric energy to the target part through the output end.

[0088] Optionally, the power generation device 10 converts renewable energy into electric energy and supplies the target power supply module of the hydrogen production power supply.

[0089] Optionally, during the process in which the target power supply module sends the electric energy to the target part in the electrolytic tank 40 connected to the output end through the output end, it is monitored in real time whether the output power of the target power supply module reaches the preset power; when it is determined that the output power of the target power supply module reaches the preset power of the target power supply module, the target power supply module sends the electric energy of the preset power to the target part in the electrolytic tank 40 connected to the output end through the output end, that is, when the output power of the power generation device reaches the preset power set for the line, the target part connected to the output end in the electrolytic tank is continuously supplied with electric energy of the preset power.

[0090] It should be noted that the preset power is set by the technical personnel according to the actual situation or multiple tests, for example, when there are four power supply modules in the hydrogen production power supply, the preset power of each power supply module can be set to 25% of the maximum output rated power.

[0091] Optionally, after the target power supply module is started, the power generation device 10 supplies the target power supply module with electric energy corresponding to the output power.

[0092] The electrolytic tank 40 is used to produce hydrogen by electrolyzing water based on the electric energy received by the target part connected to the output end.

[0093] In a specific implementation, when the target part in the electrolytic tank 40 receives electric energy, it changes the alkaline or proton exchange membrane PEM and conducts electricity with liquid as the conductive medium. Since the area of the target part is small, that is, the conductive area of the end plate of the electrolytic tank 40 insulated by the diaphragm is small, the diaphragm area of each small chamber through which the current passes is also reduced, the reaction area is reduced, and thus the area of the electrolytic water reaction can be changed.

[0094] In the embodiment of the present application, the split end plate is adopted, and the target part in the end plate for conducting electricity is determined according to the output power of the power generation equipment, so as to control the conduction current of different parts of the end plate, effectively widen the working power range of the electrolytic cell, and improve the adaptability to renewable energy fluctuation. When the target part in the electrolytic cell receives electric energy, the electric conduction reaction occurs. At low power, since the area of the target part is small, the diaphragm area of each small chamber through which the current passes is also reduced, the reaction area is reduced, the current density per unit area for reaction is ensured, the oxygen gas permeation rate is constant, and the oxygen gas permeation amount is reduced, so as to ensure the purity of hydrogen.

[0095] Optionally, based on the water electrolysis hydrogen production system shown in the above embodiment of the present application, the controller 30 is further used for: if it is determined that the current output power of the power generation equipment 10 is greater than the output power of the power generation equipment 10 in the last time, the controller determines the target threshold range in which the current output power of the power generation equipment 10 is located; it is judged whether the target power module corresponding to the target threshold range in which the current output power is located has been started; if not, the target power module corresponding to the target threshold range in which the current output power is located is controlled to start.

[0096] In a specific implementation, since the controller 30 receives the output power sent by the power generation equipment 10 in real time, if it is not the first time to receive, it is necessary to compare the current output power of the power generation equipment 10 with the output power of the power generation equipment 10 in the last time, if the current output power of the power generation equipment 10 is greater than the output power of the power generation equipment 10 in the last time, the controller 30 determines that the initial threshold range in which the current output power of the power generation equipment 10 is located is the target threshold range; the power module corresponding to the target threshold range is determined from the hydrogen production power supply 20, and is taken as the target power module. Further, it is judged whether the target power module has been started, if not, the target power module is controlled to start. If it has been started, the current output power is used to continue to provide electric energy for the target power module.

[0097] Optionally, based on the water electrolysis hydrogen production system shown in the above embodiment of the present application, the controller 30 is further used for:

[0098] If it is determined that the current output power of the power generation equipment 10 is less than the output power of the power generation equipment 10 in the last time, the controller determines the target threshold range in which the current output power of the power generation equipment 10 is located; if it is determined that the second threshold value in the target threshold range in which the current output power is located is less than the first threshold value in the target threshold range corresponding to the output power in the last time, the target power module to be closed is determined based on the target threshold range corresponding to the current output power.

[0099] In a specific implementation, if the controller 30 determines that the current output power of the power generation device 10 is less than the previous output power of the power generation device, the controller 30 determines that the initial threshold range in which the current output power of the power generation device 10 is located is a target threshold range; the controller 30 compares the first threshold and the second threshold in the target threshold range corresponding to the current output power with the first threshold and the second threshold in the target threshold range corresponding to the previous output power, and if the second threshold in the target threshold range corresponding to the current output power is less than the first threshold in the target threshold range corresponding to the previous output power, the controller 30 determines the target power module that has been started in the hydrogen production power supply 20, compares the target threshold range corresponding to the current output power with the first threshold corresponding to the target power module that has been started, and closes the target power module whose first threshold is greater than the target threshold range corresponding to the current output power, that is, cuts off the output of the target power module whose first threshold is greater than the second threshold in the target threshold range corresponding to the current output power.

[0100] Optionally, the controller 30 is further configured to:

[0101] If the target threshold range corresponding to the current output power is the same as the target threshold range corresponding to the previous output power, the controller 30 provides power for the target power module corresponding to the target threshold range based on the current output power.

[0102] In a specific implementation, since the target threshold range corresponding to the current output power is the same as the target threshold range corresponding to the previous output power, it can be determined that the target power module is not started or closed at this time, and the controller 30 provides power for the target power module corresponding to the target threshold range according to the current output power.

[0103] In the embodiment of the application, when the output power is continuously increased, the target part that needs to be conducted is determined based on the output power; when the output power is continuously reduced, the target part that needs to be cut off for conduction is determined based on the output power; and the end plate of different parts is controlled to conduct current, so as to effectively widen the power range in which the electrolytic cell can work and improve the adaptability to renewable energy fluctuation.

[0104] Referring to Figure 4 A flowchart of a water electrolysis hydrogen production method is shown in the embodiment of the application, which is applied to the water electrolysis hydrogen production system shown in the embodiment of the application, and the method comprises the following steps:

[0105] In step S401, the controller obtains the output power of the power generation device.

[0106] Optionally, the power generation device converts the renewable energy into electric energy to provide electric energy for the hydrogen production power supply.

[0107] It should be noted that the power generation device can be a renewable energy power generation device.

[0108] In the implementation of step S401, the controller obtains the output power corresponding to the output power of the power generation device in real time.

[0109] Step S402: The controller determines the target threshold range of the output power of the power generation device.

[0110] In the implementation of step S402, the controller determines whether the current output power of the power generation device is within any initial threshold range, if it is, it is taken as the target threshold range, and step S403 is executed, if it is not, it returns to continue step S401.

[0111] It should be noted that the number of initial threshold ranges is the same as the number of parts into which the end plate is divided, and the target threshold range refers to the continuous values between the first threshold and the second threshold. Multiple target threshold ranges are continuous, for example: if the value of N is 4, there are 4 target threshold ranges, target threshold range 1 is [a, b), that is, the first threshold a and the second threshold b are the endpoints of the half-closed and half-open interval; target threshold range 2 is [b, c), that is, the first threshold b and the second threshold c are the endpoints of the half-closed and half-open interval; target threshold range 3 is [c, d), that is, the first threshold c and the second threshold d are the endpoints of the half-closed and half-open interval; target threshold range 4 is [d, Q), that is, the first threshold d and the second threshold Q are the endpoints of the half-closed and half-open interval; wherein 0

[0112] For example: if the end plate is divided into 4 parts of the same size, the number of target threshold ranges can be determined to be 4 at this time, and the endpoints a, b, c and d of each target threshold range are set. The endpoints a, b, c and d can be set to 7.5%, 32.5%, 57.5%, and 82.5% of the rated power Q of the electrolytic cell, respectively; that is, target threshold range 1 is [7.5%Q, 32.5%Q), target threshold range 2 is [32.5%Q, 57.5%Q), target threshold range 3 is [57.5%Q, 82.5%Q), and target threshold range 4 is [82.5%Q, Q).

[0113] Step S403: The controller determines the target power module to be started in the hydrogen production power supply based on the target threshold range.

[0114] In step S403, the target threshold range is the initial threshold range of the output power of the power generation device.

[0115] It should be noted that the process of implementing step S403 includes the following steps:

[0116] Step S11: Determine whether there is an initial threshold range smaller than the first threshold in the target threshold range in all initial threshold ranges. If there is, step S12 is performed; if not, step S13 is performed.

[0117] In the process of implementing step S11, the controller determines whether the second threshold in the initial threshold range is less than or equal to the first threshold in the target threshold range for each initial threshold range. If it is less than or equal to, step S12 is performed; if it is greater, it is discarded.

[0118] Step S12: Record the initial threshold range.

[0119] Step S13: Determine the power supply module corresponding to the initial threshold range and the target threshold range from the hydrogen production power supply, and take the power supply module corresponding to the initial threshold range and the target threshold range as the target power supply module.

[0120] It should be noted that the hydrogen production power supply includes multiple power supply modules, and the correspondence between the initial threshold range and the power supply module is established, that is, one initial threshold range corresponds to one power supply module.

[0121] In the process of implementing step S13, first, determine the power supply module corresponding to the initial threshold range from the hydrogen production power supply, and then determine the power supply module corresponding to the target threshold range from the hydrogen production power supply; take the power supply module corresponding to the initial threshold range and the power supply module corresponding to the target threshold range as the target power supply module.

[0122] Step S404: The controller controls the target power supply module to start.

[0123] Optionally, after the target power supply module starts, the power generation equipment supplies power to the target power supply module through the output power corresponding to the electric energy.

[0124] Step S405: The controller determines the target part in the electrolytic cell connected to the output end of the target power supply module, so that the target power supply module sends the electric energy to the target part in the electrolytic cell connected to the output end through the output end.

[0125] It should be noted that the hydrogen production power supply includes multiple power supply modules, and each power supply module is connected to the interface of a part of the end plate in the electrolytic cell corresponding to the output end of the line, that is, each power supply module causes the part of the end plate connected to the output end of the power supply module to conduct electricity by providing electric energy, so as to change the area of the water electrolysis reaction.

[0126] In the implementation of step S405, the controller determines a target part of the end plate connected to the output end of the power module, so that the target power module sends the electric energy to the target part through the output end.

[0127] Optionally, the power generation device converts renewable energy into electric energy and supplies the target power module of the hydrogen production power supply.

[0128] Optionally, in the process that the target power module sends the electric energy to the target part connected to the output end in the electrolytic cell through the output end, whether the output power of the target power module reaches a preset power is monitored in real time; when it is determined that the output power of the target power module reaches the preset power of the target power module, the target power module sends the electric energy of the preset power to the target part connected to the output end in the electrolytic cell through the output end, that is, when the output power of the power generation device reaches the preset power set in the line, the preset power is used to continuously supply the electric energy to the target part connected to the output end in the electrolytic cell.

[0129] It should be noted that the preset power is set by the technical personnel according to the actual situation or multiple tests, for example, when there are four power modules in the hydrogen production power supply, the preset power of each power module can be set to 25% of the maximum output rated power.

[0130] Step S406: The electrolytic cell electrolyzes water to produce hydrogen based on the electric energy received by the target part connected to the output end.

[0131] In the implementation of step S406, when the target part in the electrolytic cell receives the electric energy, the electric conduction is performed by changing the alkaline or proton exchange membrane (PEM) and taking liquid as the conductive medium. Since the area of the target part is small, the conductive area of the end plate of the electrolytic cell insulated by the diaphragm is small, and therefore the diaphragm area of each small chamber through which the current passes is also reduced, and the reaction area is reduced, so that the reaction area of the electrolyzed water can be changed.

[0132] In the embodiment of the application, the split end plate is adopted, the target part of the end plate for conducting electricity is determined by the output power of the power generation device, so as to control the conduction of the current in different parts of the end plate, effectively widen the working power range of the electrolytic cell, and improve the adaptability to the fluctuation of renewable energy. When the target part in the electrolytic cell receives the electric energy, the electric conduction reaction occurs. At low power, since the area of the target part is small, the diaphragm area of each small chamber through which the current passes is also reduced, and the reaction area is reduced, so as to ensure the current density per unit area of the reaction, the oxygen gas permeation rate is certain, and the oxygen gas permeation amount is reduced, so as to ensure the purity of hydrogen.

[0133] Based on the above-mentioned electrolytic water hydrogen production method, the embodiment of the present application also discloses another flowchart of the electrolytic water hydrogen production method, as shown in the figure, the method comprises the following steps: Figure 5

[0134] Step S501: the controller acquires the output power of the power generation device.

[0135] It should be noted that the specific implementation process of step S501 is the same as that of step S401, and they can be referred to each other.

[0136] Step S502: the controller compares the current output power of the power generation device with the output power of the power generation device in the last time, if the current output power of the power generation device is greater than the output power of the power generation device in the last time, step S503 is executed, if it is determined that the current output power of the power generation device is less than the output power of the power generation device in the last time, step S508 is executed, and if they are the same, the current output power is used to continue to provide power for the hydrogen production power supply.

[0137] In the specific implementation process of step S502, since the controller receives the output power sent by the sending device in real time, if it is not the first time to receive, the current output power of the power generation device needs to be compared with the output power of the power generation device in the last time, if the current output power of the power generation device is greater than the output power of the power generation device in the last time, step S503 is executed, if the current output power of the power generation device is less than the output power of the power generation device in the last time, step S508 is executed, and if they are the same, the current output power is used to continue to provide power for the hydrogen production power supply.

[0138] Step S503: the controller determines the target threshold range of the current output power of the power generation device.

[0139] It should be noted that the specific implementation process of step S503 is the same as that of step S402, and they can be referred to each other.

[0140] Step S504: the controller determines whether the target threshold range corresponding to the current output power has started, if not, step S505 is executed, if yes, the current output power is used to continue to provide power for the target power supply module, and returns to step S501.

[0141] ​In the implementation of step S504, the power module corresponding to the target threshold range is determined from the hydrogen production power supply as a target power module. Then it is judged whether the target power module has been started. If not, step S505 is executed. If yes, the target power module is continuously powered based on the current output power, and step S501 is returned to be executed.

[0142] Step S505: Control the target power module to start.

[0143] Step S506: The controller determines the target part of the electrolytic cell corresponding to the output end of the target power module, so that the target power module and the previously determined target power module respectively send the electric energy to the target part of the electrolytic cell connected with the output end through the output end of the target power module.

[0144] Step S507: The electrolytic cell electrolyzes water to produce hydrogen based on the electric energy received by the target part connected with the output end.

[0145] It should be noted that the implementation of steps S506 to S507 is the same as the implementation process of steps S405 to S406 described above, and can be referred to each other.

[0146] Step S508: The controller determines the target threshold range of the current output power of the power generation equipment.

[0147] It should be noted that the implementation process of step S508 is the same as the implementation process of step S402 described above, and can be referred to each other.

[0148] Step S509: The controller compares the target threshold range corresponding to the current output power with the target threshold range corresponding to the previous output power. If the second threshold in the target threshold range corresponding to the current output power is less than the first threshold in the target threshold range corresponding to the previous output power, step S510 is executed. If the target threshold range corresponding to the current output power is the same as the target threshold range corresponding to the previous output power, step S511 is executed.

[0149] In the implementation of step S509, the controller compares the first threshold and the second threshold in the target threshold range corresponding to the current output power with the first threshold and the second threshold in the target threshold range corresponding to the previous output power, and if the second threshold in the target threshold range corresponding to the current output power is less than the first threshold in the target threshold range corresponding to the previous output power, step S510 is performed, and if the first threshold and the second threshold in the target threshold range corresponding to the current output power are the same as the first threshold and the second threshold in the target threshold range corresponding to the previous output power, step S511 is performed.

[0150] Step S510: The controller determines the target power supply module to be turned off based on the target threshold range corresponding to the current output power.

[0151] In the implementation of step S510, the target power supply module that has been started in the hydrogen production power supply is determined, the target threshold range corresponding to the current output power is compared with the first threshold corresponding to the started target power supply module, and the target power supply module whose first threshold is greater than the target threshold range corresponding to the current output power is turned off, that is, the output of the target power supply module whose first threshold is greater than the target threshold range corresponding to the current output power is cut off.

[0152] Step S511: The controller provides power to the target power supply module corresponding to the target threshold range based on the current output power.

[0153] In the implementation of step S511, since the target threshold range corresponding to the current output power is the same as the target threshold range corresponding to the previous output power, it can be determined that the target power supply module is not started or turned off at this time, and power is provided to the target power supply module corresponding to the target threshold range according to the current output power.

[0154] Here, the target threshold range refers to the target threshold range corresponding to the current output power.

[0155] In the embodiment of the application, when the output power continuously increases, the target part that needs to be conducted is determined based on the output power, and when the output power continuously decreases, the target part that needs to be cut off is determined based on the output power, so as to control the conduction current of the end plate of different parts, effectively widen the power range in which the electrolytic cell can work, and improve the adaptability to renewable energy fluctuation and the hydrogen purity at low power.

[0156] The embodiment of the application also discloses an electronic device for running a database storage process, wherein the running of the database storage process performs the above-mentioned Figures 4-5 The disclosed water electrolysis hydrogen production method.

[0157] The embodiment of the present application further discloses a computer storage medium, which comprises a database stored procedure, wherein the device where the storage medium is located is controlled to execute the above-mentioned method when the database stored procedure is running. Figures 4-5 Disclosed is a method for producing hydrogen by electrolysis of water.

[0158] Each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system or system embodiments, since they are basically similar to the method embodiments, they are described more simply, and the related parts can be referred to the part of the method embodiments. The above-described system and system embodiments are merely illustrative, and the units described as separate components can be or can not be physically separated, and the components shown as units can be or can not be physical units, i.e., they can be located in one place or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to the actual needs. Those skilled in the art can understand and implement without creative labor.

[0159] The skilled in the art can further realize that the units and algorithm steps of the examples described in combination with the disclosed embodiments herein can be realized in electronic hardware, computer software or combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in general in the above description. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0160] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for producing hydrogen by electrolysis of water, characterized in that, An electrolysis hydrogen production system is applied, comprising a power generation unit, a hydrogen production power supply, a controller, and an electrolyzer. The controller is connected to both the power generation unit and the hydrogen production power supply. The power generation unit is connected to the hydrogen production power supply. The N output lines of the hydrogen production power supply are connected to the interfaces of the corresponding portions of the end plates in the electrolyzer. The method includes: The controller obtains the output power of the power generation equipment; The controller determines the target threshold range in which the power generation equipment's current output power falls; The controller determines the target power module to be started in the hydrogen production power source based on the target threshold range; The controller starts the target power module. The controller identifies the target portion of the electrolytic cell's end plate that is connected to the output terminal of the target power module, so that the target power module can send electrical energy to the target portion of the electrolytic cell connected to the output terminal through its output terminal; wherein the conductive area of ​​the target portion varies under different target threshold ranges. The electrolyzer produces hydrogen by electrolyzing water based on the electrical energy received by the target section connected to the output terminal.

2. The method according to claim 1, characterized in that, The controller determines the target threshold range of the current output power of the power generation equipment, including: The controller compares whether the current output power of the power generation equipment is within any initial threshold range; If so, the initial threshold range in which the current output power of the power generation equipment is located is taken as the target threshold range.

3. The method according to claim 1, characterized in that, The control of starting the target power module in the hydrogen production power source corresponding to the target threshold range includes: The controller determines whether there exists an initial threshold range among all initial threshold ranges that is smaller than the first threshold in the target threshold range; If it exists, record the initial threshold range; From the hydrogen production power source, determine the power modules that correspond to the initial threshold range and the target threshold range respectively, and use the power modules that correspond to the initial threshold range and the target threshold range respectively as the target power modules.

4. The method according to claim 1, characterized in that, Also includes: If the controller determines that the current output power of the power generation equipment is greater than the previous output power of the power generation equipment, the controller determines the target threshold range in which the current output power of the power generation equipment is located. Determine whether the target power module corresponding to the target threshold range where the current output power is located has been started; If not started, the target power module corresponding to the target threshold range where the current output power is located will be started.

5. The method according to claim 1, characterized in that, Also includes: If the controller determines that the current output power of the power generation equipment is less than the previous output power of the power generation equipment, the controller determines the target threshold range in which the current output power of the power generation equipment is located; If it is determined that the second threshold in the target threshold range of the current output power is less than the first threshold in the target threshold range corresponding to the previous output power, the target power module to be shut down is determined based on the target threshold range corresponding to the current output power.

6. The method according to claim 1, characterized in that, Also includes: If the target threshold range corresponding to the current output power is the same as the target threshold range corresponding to the previous output power, then power is supplied to the target power module corresponding to the target threshold range based on the current output power.

7. The method according to claim 1, characterized in that, Also includes: After the target power module is started, the power generation equipment supplies power to the target power module.

8. The method according to claim 1, characterized in that, Also includes: When the output power of the target power module reaches the preset power of the target power module, the controller controls the target power module to send the preset power of electrical energy to the target part of the electrolytic cell connected to the output terminal through the output terminal.

9. A water electrolysis hydrogen production system, characterized in that, The water electrolysis hydrogen production system includes a power generation device, a hydrogen production power supply, a controller, and an electrolyzer. The controller is connected to the power generation device and the hydrogen production power supply respectively. The power generation device is connected to the hydrogen production power supply. The N output terminals of the hydrogen production power supply are connected to the interfaces of the corresponding parts of the middle electrode plates of the electrolyzer. The controller is used to acquire the output power of the power generation equipment; the controller determines the target threshold range in which the current output power of the power generation equipment is located; based on the target threshold range, it determines the target power module to be started in the hydrogen production power supply; and controls the target power module to start. The target portion of the electrolytic cell's end plate connected to the output terminal of the target power module is identified, so that the target power module can send electrical energy to the target portion of the electrolytic cell connected to the output terminal through its output terminal; wherein the conductive area of ​​the target portion is different under different target threshold ranges; The electrolyzer is used to produce hydrogen by electrolyzing water based on electrical energy received from the target portion connected to the output terminal.

10. An electronic device, characterized in that, The electronic device is used to run a program, wherein the program executes the water electrolysis hydrogen production method as described in any one of claims 1-8.

11. A computer storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the water electrolysis hydrogen production method as described in any one of claims 1-8.

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