Electrolytic tank, electrolytic hydrogen production system and control method

Abstract

The invention relates to the technical field of renewable energy utilization, and discloses an electrolytic bath, an electrolytic hydrogen production system and a control method. The electrolytic bath body comprises a plurality of electrolysis units; the electrolysis unit comprises a plurality of bipolar plates and is used for independent electrolysis hydrogen production; and the numbers of the bipolar plates of the at least two electrolysis units are different. According to the invention, the plurality of electrolysis units capable of independently producing hydrogen through electrolysis are arranged, the numbers of the bipolar plates of at least two electrolysis units are different, and the power operation lower limit of the electrolysis unit with a small number of bipolar plates is small, so that the overall operation power lower limit of the electrolysis cell is reduced, and the overall operation power range of the electrolysis cell is widened; when the electrolytic cell is combined with the renewable power generation system, the electrolytic cell can adapt to the volatility of the renewable power generation system, and the problem that an electrolytic hydrogen production technology in the prior art cannot adapt to the volatility of the renewable power generation system is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy utilization, and in particular to an electrolyzer, an electrolytic hydrogen production system and a control method. Background Art

[0002] When fluctuating renewable energy sources such as wind power, photovoltaics, and hydropower are used as sources of electricity and directly drive water electrolysis reactions to produce hydrogen, they can simultaneously achieve the efficient production of "green hydrogen" and the dynamic consumption of renewable energy, which can effectively promote the development of renewable energy and the transformation of energy structure in my country, and promote the smooth realization of the "dual carbon" goals.

[0003] The problem currently faced when combining hydrogen electrolysis technology with renewable power generation systems (including photovoltaic power generation systems, wind power generation systems and hydropower generation systems, etc.) is that hydrogen electrolysis technology cannot adapt to the volatility of renewable power generation systems, thereby limiting the combined application of hydrogen electrolysis technology and renewable power generation systems.

[0004] Therefore, how to adapt electrolysis hydrogen production technology to the volatility of renewable power generation systems is an issue that the industry urgently needs to solve. Summary of the invention

[0005] The present invention provides an electrolyzer, an electrolytic hydrogen production system and a control method, which are used to solve the problem that the electrolytic hydrogen production technology in the prior art cannot adapt to the volatility of a renewable power generation system.

[0006] A first aspect of the present invention provides an electrolytic cell, comprising: The electrolyzer body comprises a plurality of electrolysis units; the electrolysis units comprise a plurality of bipolar plates for independent electrolysis to produce hydrogen; the number of the bipolar plates of at least two of the electrolysis units is different.

[0007] The electrolytic cell provided according to the present invention further comprises: The partition assembly is arranged between two adjacent bipolar plates and is used to separate the electrolytic cell body into two electrolytic units.

[0008] According to the electrolytic cell provided by the present invention, there are multiple partition assemblies, and the multiple partition assemblies are arranged at intervals to separate the electrolytic cell body into at least three electrolytic units.

[0009] According to the electrolytic cell provided by the present invention, the electrolytic cell body further comprises: A diaphragm, located between two adjacent bipolar plates; A sealing assembly, wherein the diaphragm is connected to the bipolar plate via the sealing assembly.

[0010] According to the electrolytic cell provided by the present invention, the sealing assembly comprises a sealing groove and a sealing member, and the sealing member is detachably mounted in the sealing groove; The sealing grooves are respectively formed on one side of the two adjacent bipolar plates facing the diaphragm; the sealing member and the diaphragm are located between the two sealing grooves; the sealing member is located in one sealing groove and is used to press the diaphragm into the other sealing groove.

[0011] According to the electrolytic cell provided by the present invention, a boss is formed on one side of the bipolar plate facing the diaphragm, and the diaphragm is laid on the boss; the sealing groove is located on one side of the boss.

[0012] According to the electrolytic cell provided by the present invention, the width of the boss is not less than mm.

[0013] A second aspect of the present invention provides a hydrogen production system by electrolysis, comprising the electrolytic cell described in any one of the above items.

[0014] The electrolysis hydrogen production system provided by the present invention further includes: A water vapor separation component, wherein the air inlet of the water vapor separation component is connected to the air outlet of each of the electrolysis units; A plurality of exhaust components corresponding to the electrolysis units one by one; the air inlets of the exhaust components are all connected to the air outlets of the water vapor separation components, so as to control the air outlet speed of the corresponding electrolysis units; A plurality of power sources correspond to the electrolysis units one by one and are used to pump the reaction liquid into the corresponding electrolysis units.

[0015] The third aspect of the present invention provides a control method for an electrolytic hydrogen production system, which is used for the electrolytic cell described above, or for the electrolytic hydrogen production system described above, wherein the electrolytic cell includes a total power operation mode and a plurality of partial power operation modes; the plurality of partial power operation modes correspond to a plurality of electrolytic units one by one; when all the electrolytic units are in the electrolytic hydrogen production, the electrolytic cell is in the total power operation mode; the control method comprises: When the required power is within the operating power range allowed by the high-power operating mode, outputting a general control instruction to control all the electrolysis units to start electrolyzing hydrogen production; When the required power is within the operating power range allowed by the corresponding partial power operating mode, a corresponding partial control instruction is output to control the corresponding electrolysis unit to start electrolytic hydrogen production.

[0016] The electrolyzer provided by the present invention is provided with a plurality of electrolysis units that can independently produce hydrogen by electrolysis, and the number of bipolar plates of at least two electrolysis units is different. The electrolysis unit with a smaller number of bipolar plates has a smaller power operation lower limit, thereby reducing the overall operating power lower limit of the electrolyzer and widening the overall operating power range of the electrolyzer. When the electrolyzer is combined with a renewable power generation system, the electrolyzer can adapt to the volatility of the renewable power generation system, thereby solving the problem that the electrolysis hydrogen production technology in the prior art cannot adapt to the volatility of the renewable power generation system.

[0017] The electrolytic hydrogen production system provided by the present invention has at least the above advantages because it includes the above electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the electrolytic hydrogen production system of the present invention.

[0020] Figure 2 It is a schematic diagram of the assembly structure of the bipolar plate, sealing assembly and diaphragm provided by the present invention.

[0021] Figure 3 It is a flow chart of the control method of the electrolytic hydrogen production system provided by the present invention.

[0022] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention.

[0023] Reference numerals: 110, electrolytic cell body; 111, bipolar plate; 112, electrolytic unit; 113, boss; 120, partition assembly; 130, diaphragm; 140, sealing assembly; 150, end plate; 141, sealing groove; 142, sealing member; 210, gas-liquid separator; 220, heat exchanger; 230, steam-water separator; 240, first switch valve; 310, exhaust pipe; 320, regulating valve; 330, switch control valve; 400. Power source. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0029] Combine the following Figures 1 to 3 The electrolytic cell, electrolytic hydrogen production system and control method of the present invention are described in detail.

[0030] like Figure 1 and Figure 2 As shown, a specific embodiment of the first aspect of the present invention provides an electrolyzer. The electrolyzer body 110 includes a plurality of electrolysis units 112; the electrolysis units 112 include a plurality of bipolar plates 111 for independent electrolysis and hydrogen production; the number of bipolar plates 111 of at least two electrolysis units 112 is different.

[0031] In this embodiment, a plurality of electrolysis units 112 that can independently produce hydrogen by electrolysis are provided, and the number of bipolar plates 111 of at least two electrolysis units 112 is different. The electrolysis unit 112 with a smaller number of bipolar plates 111 has a smaller power operation lower limit, thereby reducing the overall operating power lower limit of the electrolyzer and widening the overall operating power range of the electrolyzer. When the electrolyzer is combined with a renewable power generation system, the electrolyzer can adapt to the volatility of the renewable power generation system, thereby solving the problem that the electrolysis hydrogen production technology in the prior art cannot adapt to the volatility of the renewable power generation system.

[0032] In some embodiments, the electrolysis unit 112 includes a plurality of bipolar plates 111 and two end plates 150; the plurality of bipolar plates 111 are arranged at intervals along the first direction, and the plurality of bipolar plates 111 are disposed between the two end plates 150. An electrolysis chamber is formed between two adjacent bipolar plates 111. The electrolyte flows into each electrolysis chamber through the liquid inlet channel to be electrolyzed, and the generated hydrogen is discharged from the gas outlet of the electrolysis unit 112.

[0033] Specifically, the electrolytic cell body 110 includes two electrolytic units 112. Each electrolytic unit 112 includes a plurality of bipolar plates 111 and two end plates 150. The number of bipolar plates 111 of the two electrolytic units 112 is different.

[0034] In some other implementations, the electrolytic cell further includes a separator assembly 120 ; the separator assembly 120 is disposed between two adjacent bipolar plates 111 and is used to separate the electrolytic cell body 110 into two electrolytic units 112 .

[0035] In this embodiment, the electrolyzer body 110 can be divided into two electrolysis units 112 by providing a separation assembly 120 between adjacent bipolar plates 111, so that the two electrolysis units 112 can electrolyze and produce hydrogen independently of each other. By making the number of bipolar plates 111 of the two electrolysis units 112 different, the lower limit of the operating power of the entire electrolyzer can be reduced, thereby widening the operating power range of the electrolyzer. When the electrolyzer is combined with a renewable power generation system, the electrolyzer can adapt to the volatility of the renewable power generation system, solving the problem that the electrolysis hydrogen production technology in the prior art cannot adapt to the volatility of the renewable power generation system.

[0036] like Figure 1 As shown, specifically, the electrolytic unit 112 includes a plurality of bipolar plates 111, an end plate 150 and a separator assembly 120; the plurality of bipolar plates 111 are located between the end plate 150 and the separator assembly 120, and at this time the separator assembly 120 acts as another end plate. This design can avoid designing an additional end plate 150, reduce the material cost of the electrolytic cell, facilitate assembly, and improve the overall assembly speed of the electrolytic cell.

[0037] It should be noted that in this embodiment, there is no restriction on the number of bipolar plates 111 included in the electrolytic unit 112, nor is there any restriction on the ratio of the number of bipolar plates 111 in each electrolytic unit 112. Each electrolytic unit 112 can include a different number of bipolar plates 111 according to actual needs.

[0038] Preferably, the electrolytic cell body 110 includes two electrolytic units 112, and the number of bipolar plates 111 of the two electrolytic units 112 is 1:4. Exemplarily, taking a 1000 cubic meter electrolytic cell as an example, the original lower limit of the operating power of the electrolytic cell is 20%, that is, the minimum operation is 200 cubic meters. A partition assembly 120 is set between adjacent bipolar plates 111 to divide the 1000 cubic meter electrolytic cell into two electrolytic units 112, wherein the number of bipolar plates 111 contained in one electrolytic unit 112 is greater than the number of bipolar plates 111 of the other electrolytic unit 112, and the number ratio of bipolar plates 111 of the two electrolytic units 112 is 1:4. After such a design, the 1000 cubic meter electrolytic cell becomes an electrolytic unit 112 of 200 cubic meters and an electrolytic unit 112 of 800 cubic meters. The lowest power of the 200 cubic meter electrolytic unit 112 can be 40 cubic meters, which is equivalent to 4% of the operating power relative to the 1000 cubic meters. That is to say, such a design can reduce the lower limit of the operating power of the electrolytic cell and widen the range of the operating power of the electrolytic cell.

[0039] In some embodiments, there are multiple separator assemblies 120, which are arranged at intervals to separate the electrolytic cell body 110 into at least three electrolytic units 112. When the total number of bipolar plates 111 of the electrolytic cell remains unchanged, the lower limit of the operating power of the electrolytic cell can be further reduced by increasing the number of separator assemblies 120, thereby widening the operating power range of the electrolytic cell.

[0040] In some embodiments, the divider assembly 120 includes a divider plate.

[0041] Preferably, the partition plate is a plastic plate.

[0042] In some embodiments, the electrolytic cell body 110 further includes a diaphragm 130 and a sealing assembly 140 ; ​​the diaphragm 130 is located between two adjacent bipolar plates 111 ; and the diaphragm 130 is connected to the bipolar plates 111 via the sealing assembly 140 .

[0043] In this embodiment, by providing the sealing assembly 140, the sealing performance between the diaphragm 130 and the bipolar plate 111 can be further improved, and the problem of decreased purity caused by accidental detachment of the diaphragm 130 during assembly can be avoided. In other words, by providing the sealing assembly 140, the purity of hydrogen can be improved. This embodiment starts from the problem of improving the purity at low power so that the electrolyzer can adapt to the volatility of the renewable power generation system, and solves the problem that the electrolytic hydrogen production technology in the prior art cannot adapt to the volatility of the renewable power generation system.

[0044] like Figure 2 As shown, further, the sealing assembly 140 includes a sealing groove 141 and a sealing member 142, and the sealing member 142 is detachably mounted in the sealing groove 141; the sealing grooves 141 are respectively formed on the side of two adjacent bipolar plates 111 facing the diaphragm 130; the sealing member 142 and the diaphragm 130 are located between the two sealing grooves 141; the sealing member 142 is located in one sealing groove 141, and is used to press the diaphragm 130 into the other sealing groove 141. Such a design can form three assembly surfaces between the two bipolar plates 111, the sealing member 142 and the diaphragm 130, further improving the sealing and assembly firmness.

[0045] Furthermore, a boss 113 is formed on one side of the bipolar plate 111 facing the diaphragm 130, and the diaphragm 130 is laid on the boss 113; the sealing groove 141 is located on one side of the boss 113. By arranging the sealing groove 141 on one side of the boss 113, compared with the solution of arranging the sealing groove 141 on the boss 113, the contact area between the boss 113 and the diaphragm 130 can be increased, and the sealing performance can be further improved.

[0046] Furthermore, the width of the boss 113 is not less than 10 mm. The width of the boss 113 of the existing bipolar plate 111 is 5 mm to 10 mm. In this embodiment, the width of the boss 113 is widened to increase the contact area between the boss 113 and the diaphragm 130 to increase the sealing distance and improve the sealing performance.

[0047] Preferably, the width of the boss 113 is not less than 20 mm.

[0048] Preferably, the sealing groove 141 is an annular structure.

[0049] Preferably, the seal 142 may be a rubber seal 142 or a silicone seal 142 .

[0050] like Figure 1 As shown, a specific embodiment of the second aspect of the present invention provides an electrolytic hydrogen production system. The electrolytic hydrogen production system includes the above-mentioned electrolyzer.

[0051] Since the electrolysis hydrogen production system of this embodiment includes the above-mentioned electrolytic cell, it has at least the above-mentioned advantages, which will not be described in detail here.

[0052] Furthermore, the electrolyzer hydrogen production system also includes a water vapor separation component and a plurality of exhaust components; the air inlet of the water vapor separation component is connected to the air outlet of each electrolysis unit 112; the plurality of exhaust components correspond to the electrolysis units 112 one by one; the air inlet of the exhaust component is connected to the air outlet of the water vapor separation component, and is used to control the air outlet speed of the corresponding electrolysis unit 112. By setting the water vapor separation component, the water vapor separation component can effectively separate the water vapor generated during the electrolysis process from the hydrogen, thereby ensuring that the output hydrogen has a high purity. High-purity hydrogen can meet the needs of more high-end applications, such as fuel cells, semiconductor manufacturing and other fields. Through the one-to-one correspondence design of multiple exhaust components and electrolysis units 112, precise control of the air outlet speed of each electrolysis unit 112 can be achieved. This precise control helps to maintain the stability and reliability of the system and avoid system fluctuations or failures caused by too fast or too slow air outlet speeds. The synergistic effect of water vapor separation and exhaust components can optimize the performance of the entire electrolysis hydrogen production system. By reducing the impact of water vapor on the electrolysis process, the electrolysis efficiency can be improved and energy consumption can be reduced, thereby extending the service life of the system and reducing operating costs. The design of water vapor separation components and exhaust components also helps to enhance the safety of the system. They can prevent the system pressure from increasing due to water vapor accumulation or poor hydrogen discharge, thereby avoiding possible explosions or leakage accidents.

[0053] like Figure 1As shown, specifically, the water vapor separation part includes a gas-liquid separator 210, a heat exchanger 220 and a steam-water separator 230; the air inlet of the gas-liquid separator 210 is connected to the air outlets of multiple electrolysis units 112, and a first switch valve 240 is provided on the air flow path between the air inlet of the gas-liquid separator 210 and the air outlet of the electrolysis unit 112; the air outlet of the gas-liquid separator 210 is connected to the air inlet of the heat exchanger 220, the air outlet of the heat exchanger 220 is connected to the air inlet of the steam-water separator 230, and the air outlet of the steam-water separator 230 is connected to the air inlet of multiple exhaust components. The heat exchanger 220 is used to heat hydrogen to further gasify the liquid hydrogen. The steam-water separator 230 is used to remove water vapor in the hydrogen to further improve the purity of the hydrogen.

[0054] Specifically, the exhaust components include an exhaust pipe 310, a regulating valve 320 and a switch control valve 330; the exhaust pipe 310 is installed at the air outlet of the steam-water separator 230; the regulating valve 320 and the switch control valve 330 are both installed on the exhaust pipe 310. The regulating valve 320 is used to adjust the air flow transmission speed. The switch control valve 330 is used to control the air flow interruption.

[0055] Specifically, there are two switch control valves 330, and the regulating valve 320 is located between the two switch control valves 330. Such a design facilitates the maintenance and replacement of the regulating valve 320.

[0056] Preferably, the regulating ranges of the regulating valves 320 of the multiple exhaust components are different. For example, the regulating range of the regulating valve 320 corresponding to the electrolysis unit 112 including a larger number of bipolar plates 111 is larger. The regulating range of the regulating valve 320 corresponding to the electrolysis unit 112 including a smaller number of bipolar plates 111 is smaller.

[0057] Furthermore, the electrolysis hydrogen production system also includes a plurality of power sources 400; the plurality of power sources 400 correspond to the electrolysis units 112 one by one, and are used to pump the reaction liquid into the corresponding electrolysis units 112. Each electrolysis unit 112 has an independent power source 400 to supply the reaction liquid, which can ensure that each electrolysis unit 112 can obtain sufficient reaction liquid when needed, thereby maintaining an efficient electrolysis process. The reduction in electrolysis efficiency due to insufficient supply of reaction liquid is avoided. The combination of independent power sources 400 and electrolysis units 112 makes the system more flexible. For example, in some cases, the power or reaction liquid flow of a specific electrolysis unit 112 can be adjusted as needed to adapt to different production needs or optimize energy use. When a power source 400 or electrolysis unit 112 fails, other units can continue to work, thereby reducing the risk of the entire system stopping operation due to a single failure. This redundant design helps to improve the overall reliability of the system. Since each electrolysis unit 112 has an independent power source 400 and reaction liquid supply system, each unit can be more easily maintained and managed. For example, each unit can be regularly inspected, cleaned, and repaired to ensure that it is always in optimal working condition. Different power sources 400 may have different energy efficiencies and costs. By equipping each electrolysis unit 112 with an independent power source 400, the most appropriate energy supply solution can be selected according to actual conditions, thereby optimizing energy utilization and reducing costs.

[0058] Preferably, the power source 400 is a lye pump, which is preferably a variable frequency pump.

[0059] Preferably, the power of the multiple alkali liquid pumps is different. For example, the power of the alkali liquid pump corresponding to the electrolysis unit 112 including a larger number of bipolar plates 111 is larger, while the power of the alkali liquid pump corresponding to the electrolysis unit 112 including a smaller number of bipolar plates 111 is smaller.

[0060] like Figure 3 As shown, the third aspect of the present invention provides a control method for an electrolytic hydrogen production system. The control method is used for the electrolyzer or electrolytic hydrogen production system of any of the above embodiments; the electrolyzer includes a total power operation mode and multiple sub-power operation modes; the multiple sub-power operation modes correspond to multiple electrolytic units 112 one by one; when all electrolytic units 112 are in electrolytic hydrogen production, the electrolyzer is in the total power operation mode; the control method includes: S100, when the required power is within the operating power range allowed by the high power operating mode, output a general control instruction to control all the electrolysis units 112 to start electrolysis to produce hydrogen; S200. When the required power is within the operating power range allowed by the corresponding power division operating mode, output a corresponding sub-control instruction to control the corresponding electrolysis unit 112 to start electrolytic hydrogen production.

[0061] In this embodiment, since the multiple electrolysis units 112 of the electrolyzer correspond to multiple power-divided operation modes, each power-divided operation mode has a corresponding allowable operating power range, the control method can flexibly select and control the corresponding electrolysis unit 112 according to the required operating power. This flexibility enables the electrolysis hydrogen production system to better adapt to the hydrogen production needs of different scales. By accurately controlling the operating state of each electrolysis unit 112, the control method can optimize the configuration of resources such as electricity and water resources to ensure that the system operates at high efficiency. The control method avoids unnecessary energy waste by accurately controlling the operating power of the electrolysis unit 112. At the same time, it can also adjust the output power of the power source 400 according to actual needs to further reduce energy consumption. By accurately controlling the electrolysis process, the control method helps to improve the purity of hydrogen and reduce the impurity content, thereby improving the quality and utilization value of hydrogen. The control method can monitor the operating state of the electrolysis unit 112 in real time, and limit it according to the allowable operating power range to prevent the electrolysis unit 112 from overloading, thereby extending the equipment life and reducing maintenance costs.

[0062] Specifically, when the required power is within the operating power range allowed by the high-power operating mode, a general control instruction is output to control all the electrolysis units 112 to start electrolyzing and producing hydrogen, control all the alkali solution pumps to start, control the regulating valve with the largest range to open, and the other regulating valves to close, control the switch control valve on the exhaust pipe of the regulating valve with the largest adjustment range to open, and the other switch control valves to close.

[0063] Specifically, when the required power is within the operating power range allowed by the corresponding power division operating mode, the corresponding sub-control instruction is output to control the corresponding electrolysis unit 112 to start electrolysis and hydrogen production, and control the corresponding alkali liquid pump, switch control valve and regulating valve to open.

[0064] Specifically, for the solution that the electrolyzer includes two electrolysis units 112, the electrolyzer includes two power-divided operation modes and a total power operation mode, wherein the power-divided operation mode includes an ultra-low power operation mode and a medium-low power operation mode; the total power operation mode is named a high power operation mode. It can be understood that when the electrolysis units 112 with a small number of bipolar plates 111 electrolyze and produce hydrogen, the electrolyzer is in an ultra-low power operation mode, and the allowable operating power range of the electrolyzer is named the first allowable operating power range; when the electrolysis units 112 with a large number of bipolar plates 111 electrolyze and produce hydrogen, the electrolyzer is in a medium-low power operation mode, and the allowable operating power range of the electrolyzer is named the second allowable operating power range; when the two electrolysis units 112 electrolyze and produce hydrogen at the same time, the electrolyzer is in a high power operation mode, and the allowable operating power range of the electrolyzer is named the third allowable operating power range.

[0065] Specifically, the alkali liquid pump corresponding to the electrolytic unit 112 with a smaller number of bipolar plates 111 is named a small alkali liquid pump, and the corresponding regulating valve 320 is named a small regulating valve 320; when the electrolytic cell is in ultra-low power mode, the small alkali liquid pump and the small regulating valve 320 are both opened.

[0066] Specifically, the alkali liquid pump corresponding to the electrolytic unit 112 with a large number of bipolar plates 111 is named as a large alkali liquid pump, and the corresponding regulating valve 320 is named as a large regulating valve 320. When the electrolytic cell is in the medium and low power operation mode, the large alkali liquid pump and the large regulating valve 320 are both opened.

[0067] It can be understood that when the electrolytic cell is in the high power operation mode, the small alkali solution pump, the large alkali solution pump and the large regulating valve 320 are all turned on.

[0068] Specifically, when the required operating power is within the first allowable operating power range, the first control instruction is output to control the small alkali liquid pump to start working, the large alkali liquid pump is turned off, the corresponding switch control valve 330 is opened, the small regulating valve 320 is opened, and the large regulating valve 320 is closed. At this time, the small alkali liquid pump pumps the reaction liquid into the electrolysis unit 112 with fewer bipolar plates 111, and the reaction liquid is electrolyzed in the electrolysis unit 112 to produce hydrogen. The hydrogen flows out from the gas outlet of the electrolysis unit 112, enters the gas-liquid separator 210, the heat exchanger 220 and the steam-water separator 230 in sequence, and finally enters the exhaust pipe 310 to be systemized.

[0069] Specifically, when the required operating power is within the second allowable operating power range, the second control instruction is output to control the large alkali liquid pump to start working, the small alkali liquid pump is turned off, the corresponding switch control valve 330 is opened, the large regulating valve 320 is opened, and the small regulating valve 320 is closed. At this time, the large alkali liquid pump pumps the reaction liquid into the electrolysis unit 112 with more bipolar plates 111, and the reaction liquid is electrolyzed in the electrolysis unit 112 to produce hydrogen. The hydrogen flows out from the gas outlet of the electrolysis unit 112, enters the gas-liquid separator 210, the heat exchanger 220 and the steam-water separator 230 in sequence, and finally enters the exhaust pipe 310 to be systemized.

[0070] Specifically, when the required operating power is within the third allowable operating power range, the third control instruction is output to control the large alkali liquid pump and the small alkali liquid pump to start working at the same time, the switch control valve 330 is opened, the large regulating valve 320 is opened, and the small regulating valve 320 is closed. At this time, the large alkali liquid pump pumps the reaction liquid into the electrolysis unit 112 with more bipolar plates 111, and the small alkali liquid pump pumps the reaction liquid into the electrolysis unit 112 with fewer bipolar plates 111; the reaction liquid is electrolyzed in the corresponding electrolysis unit 112 to produce hydrogen, and the hydrogen flows out from the gas outlet of the electrolysis unit 112, enters the gas-liquid separator 210, the heat exchanger 220 and the steam-water separator 230 in sequence, and finally enters the exhaust pipe 310 to be systemized.

[0071] Preferably, the first allowable operating power range is 5% to 20%, the second allowable operating power range is 20% to 70%, and the third allowable operating power range is 70% to 110%.

[0072] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 810, a communications interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communications interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the control method of the electrolysis hydrogen production system, the method comprising: outputting corresponding control instructions according to the required operating power and the corresponding allowable operating power range to control the corresponding exhaust component and the corresponding power source to start working.

[0073] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0074] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the electrolysis hydrogen production system provided by the above methods, which includes: according to the required operating power and the corresponding allowable operating power range, outputting corresponding control instructions to control the corresponding exhaust components and the corresponding power source to start working.

[0075] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the control method of the electrolysis hydrogen production system provided by the above-mentioned methods. The method includes: according to the required operating power and the corresponding allowable operating power range, outputting corresponding control instructions to control the corresponding exhaust components and the corresponding power source to start working.

[0076] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0077] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrolytic cell, characterized in that: include: The electrolysis cell body (110) comprises a plurality of electrolysis units (112); the electrolysis units (112) comprise a plurality of bipolar plates (111) for independently producing hydrogen by electrolysis; the number of the bipolar plates (111) of at least two of the electrolysis units (112) is different.

2. The electrolytic cell according to claim 1, characterized in that Also includes: A separation assembly (120) is disposed between two adjacent bipolar plates (111) and is used to separate the electrolytic cell body (110) into two electrolytic units (112).

3. The electrolytic cell according to claim 2, characterized in that There are a plurality of the partition assemblies (120), and the plurality of the partition assemblies (120) are arranged at intervals to separate the electrolytic cell body (110) into at least three electrolytic units (112).

4. The electrolytic cell according to any one of claims 1 to 3, characterized in that: The electrolytic cell body (110) further comprises: A diaphragm (130) located between two adjacent bipolar plates (111); A sealing assembly (140), wherein the diaphragm (130) is connected to the bipolar plate (111) via the sealing assembly (140).

5. The electrolytic cell according to claim 4, characterized in that The sealing assembly (140) comprises a sealing groove (141) and a sealing member (142), wherein the sealing member (142) is detachably mounted in the sealing groove (141); The sealing grooves (141) are respectively formed on one side of two adjacent bipolar plates (111) facing the diaphragm (130); the sealing member (142) and the diaphragm (130) are located between the two sealing grooves (141); and the sealing member (142) is located in one of the sealing grooves (141) and is used to press the diaphragm (130) into the other sealing groove (141).

6. The electrolytic cell according to claim 5, characterized in that A boss (113) is formed on one side of the bipolar plate (111) facing the diaphragm (130), and the diaphragm (130) is laid on the boss (113); the sealing groove (141) is located on one side of the boss (113).

7. The electrolytic cell according to claim 6, characterized in that The width of the boss (113) is not less than 10 mm.

8. A hydrogen production system by electrolysis, characterized in that: An electrolytic cell comprising any one of claims 1 to 7.

9. The electrolysis hydrogen production system according to claim 8, characterized in that: Also includes: a water vapor separation component, wherein the air inlet of the water vapor separation component is in communication with the air outlet of each of the electrolysis units (112); A plurality of exhaust components corresponding one to one with the electrolysis units (112); the air inlets of the exhaust components are all in communication with the air outlets of the water vapor separation components, so as to control the air outlet speed of the corresponding electrolysis units (112); A plurality of power sources (400) correspond one to one with the electrolysis units (112) and are used to pump reaction liquid into the corresponding electrolysis units (112).

10. A control method for an electrolytic hydrogen production system, characterized in that: The electrolyzer according to any one of claims 1 to 7, or the electrolysis hydrogen production system according to claim 8 or 9, wherein the electrolyzer comprises a total power operation mode and a plurality of partial power operation modes; the plurality of partial power operation modes correspond one to one with the plurality of electrolysis units (112); When all the electrolysis units (112) are in the process of producing hydrogen by electrolysis, the electrolyzer is in a total power operation mode; the control method comprises: When the required power is within the operating power range allowed by the high power operating mode, outputting a general control instruction to control all the electrolysis units (112) to start electrolytic hydrogen production; When the required power is within the operating power range allowed by the corresponding partial power operating mode, a corresponding partial control instruction is output to control the corresponding electrolysis unit (112) to start electrolytic hydrogen production.

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