Hydrogen production system and hydrogen production system control method

Abstract

The present invention relates to the field of hydrogen production by electrolysis of water, and specifically to a hydrogen production system and a method for controlling the hydrogen production system. The hydrogen production system includes: a hydrogen production device and a control device, wherein the hydrogen production device is used to ionize water to produce hydrogen and oxygen; the control device is used to obtain the first actual pressure and the first actual liquid level corresponding to the side where the hydrogen production device produces oxygen, and the second actual liquid level corresponding to the side where the hydrogen production device produces hydrogen, and to monitor the actual current change corresponding to the hydrogen production device in real time; the control device is also used to control the hydrogen production device according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current change to ensure the safety of the hydrogen production device. This ensures that the hydrogen production system maintains a pressure balance and a liquid level balance between the oxygen production side and the hydrogen production side at all times during operation. This prevents the hydrogen production volume from changing dramatically at any time, causing the safety risk of the hydrogen production system to exceed the safety threshold and cause the safety risk of the hydrogen production system.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen production by electrolysis of water, and in particular to a hydrogen production system and a method for controlling the hydrogen production system. Background Art

[0002] When the water electrolysis hydrogen production system is working, alkaline solution enters from the inlet of the electrolytic cell, oxygen is generated at the anode of the electrolytic cell, and hydrogen is generated at the cathode. At the same time, the electrolytic cell also generates a large amount of heat, and the alkaline solution needs to be circulated continuously to take away the gas and heat. Part of the alkaline solution and hydrogen form a two-phase flow and flow out from the cathode outlet of the electrolytic cell, and part of the alkaline solution and oxygen form a two-phase flow and flow out from the anode outlet of the electrolytic cell.

[0003] Because the anode in the electrolyzer consumes OH- and the cathode generates OH-, in order to balance the concentration of OH- entering the electrolyzer again, the bottoms of the two separators are connected to form a U-shaped tube. In actual hydrogen production systems, the hydrogen-side separator and the oxygen-side separator are exactly the same size and installed at the same height. Because the separator forms a U-tube, when the pressure inside the two separators is different, a liquid level difference will form. When the liquid level difference is too large, it is possible for the gas on one side to enter the separator on the other side through the bottom pipe, causing the hydrogen and oxygen mixture to easily explode and threaten the safety of the system and personnel. Therefore, when the water electrolysis hydrogen production system is operating, it is necessary to maintain the pressure and liquid level balance on both sides at all times (the liquid level difference should generally be less than 10mm).

[0004] Therefore, how to achieve the balance of pressure and liquid level on both sides of the electrolysis water hydrogen production system at all times has become an urgent problem to be solved. Summary of the Invention

[0005] In view of this, the embodiments of the present invention provide a hydrogen production system and a hydrogen production system control method, which aim to solve the problem in the prior art of how to achieve the balance of pressure and liquid level on both sides of the electrolysis water hydrogen production system during operation, which has become an urgent problem to be solved.

[0006] According to a first aspect, an embodiment of the present invention provides a hydrogen production system, which includes: a hydrogen production device and a control device, wherein:

[0007] Hydrogen production equipment, used to ionize water to produce hydrogen and oxygen;

[0008] A control device, configured to obtain a first actual pressure and a first actual liquid level corresponding to a side of the hydrogen production device that produces oxygen, and a second actual liquid level corresponding to a side that produces hydrogen, and to monitor in real time an actual current change corresponding to the hydrogen production device;

[0009] The control device is further used to control the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level and the actual current change to ensure the safety of the hydrogen production equipment.

[0010] In a hydrogen production system provided by an embodiment of the present invention, a hydrogen production device is provided for ionizing water to produce hydrogen and oxygen; a control device is provided for obtaining a first actual pressure and a first actual liquid level corresponding to the oxygen production side of the hydrogen production device, and a second actual liquid level corresponding to the hydrogen production side, and monitoring the actual current change corresponding to the hydrogen production device in real time; the control device is also provided for controlling the hydrogen production device based on the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change, so as to ensure that the hydrogen production system maintains a pressure balance and a liquid level balance between the oxygen production side and the hydrogen production side at all times. In addition, since the control device is also provided for controlling the hydrogen production device based on the actual current change, it is possible to avoid a drastic change in hydrogen production at any time, resulting in a lag in the control of the first actual pressure and the first actual liquid level corresponding to the oxygen production side of the hydrogen production device, and the second actual liquid level and the second actual pressure corresponding to the hydrogen production side, thereby causing the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to fluctuate beyond a safety threshold, thereby causing a safety risk to the hydrogen production system.

[0011] In combination with the first aspect, in a first embodiment of the first aspect, the control device is used to obtain a preset current change threshold corresponding to the hydrogen production equipment;

[0012] Comparing the actual current change with a preset current change threshold;

[0013] When the actual current change is greater than the preset current change threshold, the hydrogen production rate change corresponding to the hydrogen production equipment is calculated according to the actual current change;

[0014] According to the change in hydrogen production rate, the oxygen side regulating valve and hydrogen side regulating valve corresponding to the hydrogen production equipment are adjusted.

[0015] The hydrogen production system provided in an embodiment of the present invention obtains a preset current change threshold corresponding to the hydrogen production equipment; compares the actual current change with the preset current change threshold, thereby ensuring the accuracy of the comparison result. When the actual current change is greater than the preset current change threshold, the hydrogen production rate change corresponding to the hydrogen production equipment is calculated based on the actual current change, thereby ensuring the accuracy of the calculated hydrogen production rate change corresponding to the hydrogen production equipment. Then, based on the hydrogen production rate change, the oxygen side regulating valve and the hydrogen side regulating valve corresponding to the hydrogen production equipment are adjusted. This avoids the actual current change of the hydrogen production equipment being too large, resulting in the hydrogen production amount possibly changing dramatically at any time, and the phenomenon of lag in control of the first actual pressure and the first actual liquid level corresponding to the oxygen production side of the hydrogen production equipment, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen production side, thereby causing the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to fluctuate beyond the safety threshold, thereby causing the safety risk of the hydrogen production system to exceed the safety threshold.

[0016] In combination with the first embodiment of the first aspect, in the second embodiment of the first aspect, the control device is used to obtain an actual hydrogen production rate corresponding to the hydrogen production equipment;

[0017] According to the relationship between the change in hydrogen production rate and the actual hydrogen production rate, the oxygen side regulating valve and the hydrogen side regulating valve corresponding to the hydrogen production equipment are adjusted.

[0018] The hydrogen production system provided by the embodiment of the present invention obtains the actual hydrogen production rate corresponding to the hydrogen production equipment; according to the relationship between the change in hydrogen production rate and the actual hydrogen production rate, the oxygen-side regulating valve and the hydrogen-side regulating valve corresponding to the hydrogen production equipment are adjusted, thereby ensuring the accuracy of the adjustment of the oxygen-side regulating valve and the hydrogen-side regulating valve corresponding to the hydrogen production equipment. This avoids excessive changes in the actual current of the hydrogen production equipment, which may cause the hydrogen production volume to change dramatically at any time, and the phenomenon of lag in the control of the first actual pressure and the first actual liquid level corresponding to the oxygen-producing side of the hydrogen production equipment, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen-producing side, which may cause the first actual pressure, the second actual pressure, the first actual liquid level and the second actual liquid level to fluctuate beyond the safety threshold, thereby causing the safety risk of the hydrogen production system to exceed the safety threshold.

[0019] In combination with the first embodiment of the first aspect, in the third embodiment of the first aspect, the control device is also used to obtain a first set pressure corresponding to the side of the hydrogen production system that produces oxygen; and adjust the oxygen side regulating valve according to the difference between the first actual pressure and the first set pressure.

[0020] The hydrogen production system provided in an embodiment of the present invention obtains a first set pressure corresponding to the oxygen-producing side of the hydrogen production system; and adjusts the oxygen-side regulating valve based on the difference between the first actual pressure and the first set pressure, thereby ensuring accurate adjustment of the oxygen-side regulating valve. This ensures pressure balance on both sides of the hydrogen production equipment.

[0021] In combination with the first embodiment of the first aspect, in the fourth embodiment of the first aspect, the control device is further configured to calculate an actual liquid level difference between the first actual liquid level and the second actual liquid level;

[0022] Get the set liquid level difference corresponding to the actual liquid level difference;

[0023] The hydrogen side regulating valve is adjusted according to the difference between the actual liquid level difference and the set liquid level difference.

[0024] The hydrogen production system provided in an embodiment of the present invention calculates the actual liquid level difference between a first actual liquid level and a second actual liquid level, ensuring the accuracy of the calculated actual liquid level difference. A set liquid level difference corresponding to the actual liquid level difference is obtained. Based on the difference between the actual liquid level difference and the set liquid level difference, the hydrogen-side regulating valve is adjusted, ensuring the accuracy of the hydrogen-side regulating valve adjustment, thereby achieving liquid level balance on both sides of the hydrogen production equipment.

[0025] In combination with the first aspect, in a fifth implementation of the first aspect, the control device is used to obtain a preset current change threshold corresponding to the hydrogen production equipment;

[0026] Comparing the actual current change with a preset current change threshold;

[0027] When the actual current change is less than or equal to a preset current change threshold, obtaining a first set pressure corresponding to the oxygen-producing side of the hydrogen production system; and adjusting the oxygen-side regulating valve corresponding to the hydrogen production equipment according to the difference between the first actual pressure and the first set pressure;

[0028] calculating an actual liquid level difference between the first actual liquid level and the second actual liquid level;

[0029] Get the set liquid level difference corresponding to the actual liquid level difference;

[0030] According to the difference between the actual liquid level difference and the set liquid level difference, the hydrogen side regulating valve corresponding to the hydrogen production equipment is adjusted.

[0031] The hydrogen production system provided in an embodiment of the present invention compares the actual current change with a preset current change threshold, ensuring the accuracy of the comparison result. When the actual current change is less than or equal to the preset current change threshold, a first set pressure corresponding to the oxygen-producing side of the hydrogen production system is obtained. Based on the difference between the first actual pressure and the first set pressure, the oxygen-side regulating valve corresponding to the hydrogen production equipment is adjusted, ensuring the accuracy of the oxygen-side regulating valve adjustment. This ensures pressure balance on both sides of the hydrogen production equipment.

[0032] The actual liquid level difference between the first actual liquid level and the second actual liquid level is calculated to ensure the accuracy of the calculated actual liquid level difference. The set liquid level difference corresponding to the actual liquid level difference is obtained; and the hydrogen-side regulating valve is adjusted according to the difference between the actual liquid level difference and the set liquid level difference, ensuring the accuracy of the adjustment of the hydrogen-side regulating valve, thereby achieving liquid level balance on both sides of the hydrogen production equipment.

[0033] In combination with the first aspect, in a sixth embodiment of the first aspect, the hydrogen production equipment includes:

[0034] Electrolytic cell, the electrolytic cell is used to hold water;

[0035] a power supply connected to the electrolyzer and used to ionize water in the electrolyzer to generate hydrogen and oxygen;

[0036] The oxygen-side gas-liquid separator is connected to the electrolytic cell and is used to separate the oxygen and water produced by ionization;

[0037] The hydrogen-side gas-liquid separator is connected to the electrolyzer and is used to separate the hydrogen and water produced by ionization.

[0038] The hydrogen production system provided in an embodiment of the present invention includes hydrogen production equipment including: an electrolyzer, which is used to hold water; a power supply connected to the electrolyzer and used to ionize the water in the electrolyzer; an oxygen-side gas-liquid separator connected to the electrolyzer and used to separate the oxygen and water generated by ionization; and a hydrogen-side gas-liquid separator connected to the electrolyzer and used to separate the hydrogen and water generated by ionization, thereby ionizing water to generate oxygen and hydrogen.

[0039] In combination with the sixth embodiment of the first aspect, in the seventh embodiment of the first aspect, the hydrogen production equipment further includes:

[0040] The oxygen side regulating valve is used to change the valve opening under the control of the control equipment to ensure the safety of the hydrogen production equipment;

[0041] The hydrogen side regulating valve is used to change the valve opening under the control of the control equipment to ensure the safety of the hydrogen production equipment.

[0042] The hydrogen production system provided in the embodiment of the present invention further includes: an oxygen-side regulating valve configured to change the valve opening under the control of the control device to ensure the safety of the hydrogen production equipment;

[0043] The hydrogen side regulating valve is used to change the valve opening under the control of the control equipment to ensure the safety of the hydrogen production equipment. By controlling the oxygen side regulating valve and the hydrogen side regulating valve, the liquid level balance and pressure balance on both sides of the hydrogen production equipment are guaranteed, thereby ensuring the safety of the hydrogen production system.

[0044] In combination with the seventh embodiment of the first aspect, in the eighth embodiment of the first aspect, the hydrogen production equipment further includes:

[0045] an oxygen-side liquid level sensor, communicatively connected to the control device, for measuring a first actual liquid level corresponding to the oxygen-side gas-liquid separator and transmitting the first actual liquid level to the control device;

[0046] a hydrogen-side liquid level sensor, communicatively connected to the control device, for measuring a second actual liquid level corresponding to the hydrogen-side gas-liquid separator, and transmitting the second actual liquid level to the control device;

[0047] an oxygen-side separator pressure transmitter, communicatively connected to the control device, for measuring a first actual pressure corresponding to the oxygen-side gas-liquid separator and transmitting the first actual pressure to the control device;

[0048] a hydrogen-side separator pressure transmitter, communicatively connected to the control device, for measuring a second actual pressure corresponding to the hydrogen-side gas-liquid separator, and transmitting the second actual pressure to the control device;

[0049] A current sensor is connected to the control device for measuring the actual current of the power supply in real time and transmitting the actual current to the control device;

[0050] The control device is also used to calculate the actual current change corresponding to the hydrogen production equipment in real time based on the actual current received in real time.

[0051] The hydrogen production system provided in an embodiment of the present invention further includes: an oxygen-side liquid level sensor, communicatively connected to the control device, for measuring a first actual liquid level corresponding to the oxygen-side gas-liquid separator, and transmitting the first actual liquid level to the control device; thereby ensuring the accuracy of the first actual liquid level obtained by the control device. A hydrogen-side liquid level sensor, communicatively connected to the control device, for measuring a second actual liquid level corresponding to the hydrogen-side gas-liquid separator, and transmitting the second actual liquid level to the control device; thereby ensuring the accuracy of the second actual liquid level obtained by the control device. An oxygen-side separator pressure transmitter, communicatively connected to the control device, for measuring a first actual pressure corresponding to the oxygen-side gas-liquid separator, and transmitting the first actual pressure to the control device; thereby ensuring the accuracy of the first actual pressure obtained by the control device. A hydrogen-side separator pressure transmitter, communicatively connected to the control device, for measuring a second actual pressure corresponding to the hydrogen-side gas-liquid separator, and transmitting the second actual pressure to the control device; thereby ensuring the accuracy of the second actual pressure obtained by the control device. The current sensor is communicatively connected to the control device and is used to measure the actual current of the power supply in real time and transmit the actual current to the control device. The control device is also used to calculate the actual current change corresponding to the hydrogen production equipment in real time based on the actual current received in real time, thereby ensuring the accuracy of the calculated actual current change. This can ensure the accuracy of the control device in controlling the hydrogen production equipment based on the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change. This can avoid the possibility that the hydrogen production volume may change drastically at any time, resulting in a lag in the control of the first actual pressure and the first actual liquid level corresponding to the oxygen-producing side of the hydrogen production equipment, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen-producing side, thereby causing the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to fluctuate beyond the safety threshold, thereby causing a safety risk to the hydrogen production system.

[0052] According to a second aspect, an embodiment of the present invention further provides a hydrogen production system control method, which is applied to the control device in the hydrogen production system in the first aspect or any one embodiment of the first aspect, and the method includes:

[0053] Obtaining a first actual pressure and a first actual liquid level corresponding to a side where oxygen is generated by a hydrogen production device in a hydrogen production system, and a second actual liquid level corresponding to a side where hydrogen is generated, and monitoring a change in actual current corresponding to the hydrogen production device in real time;

[0054] The hydrogen production equipment is controlled according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change to ensure the safety of the hydrogen production equipment.

[0055] The hydrogen production system control method provided in an embodiment of the present invention obtains a first actual pressure and a first actual liquid level corresponding to the oxygen-generating side of the hydrogen production equipment in the hydrogen production system, as well as a second actual liquid level corresponding to the hydrogen-generating side, and monitors the actual current change corresponding to the hydrogen production equipment in real time; and controls the hydrogen production equipment based on the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change to ensure the safety of the hydrogen production equipment. This ensures that the hydrogen production system maintains a pressure balance and a liquid level balance between the oxygen-generating side and the hydrogen-generating side at all times. Furthermore, because the control device is also used to control the hydrogen production equipment based on the actual current change, it can avoid drastic changes in hydrogen production at any time, which may cause the first actual pressure and the first actual liquid level corresponding to the oxygen-generating side of the hydrogen production equipment, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen-generating side, to lag in control. This may cause the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to fluctuate beyond a safety threshold, thereby causing a safety risk to the hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific 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 any creative work.

[0057] Figure 1 This is a schematic structural diagram of a hydrogen production system provided by an embodiment of the present invention;

[0058] Figure 2 is a structural schematic diagram of a hydrogen production system provided by another embodiment of the present invention;

[0059] Figure 3 This is a control flow chart of a control device in a hydrogen production system provided by an embodiment of the present invention;

[0060] Figure 4 This is a flow chart of a hydrogen production system control method provided by an embodiment of the present invention;

[0061] in,

[0062] Hydrogen production equipment 1;

[0063] electrolytic cell 11;

[0064] Power supply 12;

[0065] Oxygen side gas-liquid separator 13;

[0066] Hydrogen side gas-liquid separator 14;

[0067] Oxygen side regulating valve 15;

[0068] Hydrogen side regulating valve 16;

[0069] Oxygen side liquid level sensor 17;

[0070] Hydrogen side liquid level sensor 18;

[0071] Oxygen side separator pressure transmitter 19;

[0072] Hydrogen side separator pressure transmitter 110;

[0073] Current sensor 111;

[0074] Control device 2. DETAILED DESCRIPTION

[0075] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0076] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application include direct and indirect connections (couplings) unless otherwise specified. In the description of this application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0077] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0078] When the water electrolysis hydrogen production system is operating, alkaline solution enters the electrolyzer inlet, generating oxygen at the anode and hydrogen at the cathode. Simultaneously, the electrolyzer generates a large amount of heat, requiring the alkaline solution to continuously circulate to remove the gas and heat. Part of the alkaline solution and hydrogen form a two-phase flow and flow out of the electrolyzer's cathode outlet, while part of the alkaline solution and oxygen form a two-phase flow and flow out of the electrolyzer's anode outlet. The gas-liquid two-phase flow needs to enter the hydrogen-side gas-liquid separator and the oxygen-side gas-liquid separator, respectively, to separate the gas from the two-phase flow. The upper portion of the separator contains gas, which accumulates there to form air pressure, the magnitude of which is the system pressure. The lower portion of the separator contains alkaline solution, and the height of the alkaline solution in the separator is called the liquid level.

[0079] Because the anode in the electrolyzer consumes OH- and the cathode generates OH-, to balance the concentration of OH- entering the electrolyzer again, the two separators are connected at the bottom to form a U-shaped tube. In actual hydrogen production systems, the hydrogen-side separator and the oxygen-side separator are exactly the same size and installed at the same height. Because the separators form a U-tube, when the pressures within the two separators differ, a liquid level difference will form. If the liquid level difference is too large, it is possible for gas from one side to enter the other side of the separator through the bottom pipe, causing the hydrogen and oxygen mixture to easily explode and threaten the safety of the system and personnel. Therefore, it is necessary to maintain a balance between the pressure and liquid level on both sides at all times during system operation (the liquid level difference should generally be less than 10mm).

[0080] System pressure is regulated by adjusting the gas flow rate through the regulating valve at the oxygen separator's gas outlet. System liquid level differential is regulated by adjusting the gas flow rate through the regulating valve at the hydrogen separator's gas outlet. Feedback control is employed. When the pressure within the oxygen separator deviates from the set pressure, the oxygen-side regulating valve opening is adjusted to control pressure. When the liquid level differential deviates from the set value, the hydrogen-side regulating valve opening is adjusted to adjust the liquid level.

[0081] In a steady-state hydrogen production scenario, the gas production of the electrolyzer is stable, and the control target can be met by relying solely on feedback control. However, under the input of green electricity (fluctuating electricity), the gas production may change dramatically at any time, and pressure and liquid level control may lag, causing pressure and liquid level fluctuations to exceed the safety margin and create safety risks.

[0082] Therefore, in one embodiment of the present application, Figure 1 As shown, a hydrogen production system is provided, wherein the hydrogen production equipment 1 comprises: a hydrogen production equipment 1 and a control device 2, wherein:

[0083] The hydrogen production equipment 1 is used to ionize water to produce hydrogen and oxygen.

[0084] Specifically, the hydrogen production equipment 1 may include an electrolyzer, a power supply, a hydrogen collection device, and an oxygen collection device. The electrolyzer is used to hold water. The power supply, connected to the electrolyzer, is used to ionize the water in the electrolyzer, thereby producing hydrogen and oxygen. The hydrogen collection device is used to collect the generated hydrogen, and the oxygen collection device is used to collect the generated oxygen.

[0085] The control device 2 is used to obtain the first actual pressure and the first actual liquid level corresponding to the side of the hydrogen production equipment 1 that produces oxygen, and the second actual liquid level corresponding to the side that produces hydrogen, and to monitor the actual current change corresponding to the hydrogen production equipment 1 in real time.

[0086] Specifically, the control device 2 can receive the first actual pressure and the first actual liquid level corresponding to the side where oxygen is produced by the hydrogen production equipment 1, and the second actual liquid level corresponding to the side where hydrogen is produced, transmitted by the monitoring device based on the connection with the monitoring device installed on the hydrogen production equipment 1, and monitor the actual current change corresponding to the hydrogen production equipment 1 in real time.

[0087] Among them, the monitoring equipment may include a pressure sensor, a liquid level sensor and a current sensor. The monitoring equipment may also include other monitoring components. The embodiment of the present application does not specifically limit the monitoring equipment.

[0088] The control device 2 is further configured to control the hydrogen production device 1 according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current variation, so as to ensure the safety of the hydrogen production device 1 .

[0089] Optionally, after obtaining the first actual pressure, the control device 2 can adjust the oxygen side regulating valve corresponding to the hydrogen production equipment 1 according to the first actual pressure, so as to ensure that the first actual pressure corresponding to the side where the hydrogen production equipment 1 produces oxygen is balanced with the second actual pressure corresponding to the side where the hydrogen production equipment 1 produces hydrogen, so as to ensure the safety of the hydrogen production equipment 1.

[0090] Optionally, after obtaining the first actual liquid level corresponding to the side of the hydrogen production equipment 1 that produces oxygen and the second actual liquid level corresponding to the side that produces hydrogen, the control device 2 can adjust the oxygen side regulating valve and the hydrogen side regulating valve according to the first actual liquid level and the second actual liquid level, respectively, so as to ensure that the first actual liquid level corresponding to the side of the hydrogen production equipment 1 that produces oxygen is balanced with the second actual liquid level corresponding to the side of the hydrogen production equipment 1 that produces hydrogen, so as to ensure the safety of the hydrogen production equipment 1.

[0091] Optionally, after obtaining the actual current change corresponding to the hydrogen production equipment 1, the control device 2 can adjust the oxygen side regulating valve and the hydrogen side regulating valve respectively according to the actual current change, so as to ensure that the first actual liquid level corresponding to the side where the hydrogen production equipment 1 produces oxygen is balanced with the second actual liquid level corresponding to the side where the hydrogen production equipment 1 produces hydrogen, and the first actual pressure corresponding to the side where the oxygen is produced is balanced with the second actual pressure corresponding to the side where the hydrogen production equipment 1 produces hydrogen to ensure the safety of the hydrogen production equipment 1.

[0092] In a hydrogen production system provided by an embodiment of the present invention, a hydrogen production device is provided for ionizing water to produce hydrogen and oxygen; a control device is provided for obtaining a first actual pressure and a first actual liquid level corresponding to the oxygen production side of the hydrogen production device, and a second actual liquid level corresponding to the hydrogen production side, and monitoring the actual current change corresponding to the hydrogen production device in real time; the control device is also provided for controlling the hydrogen production device based on the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change, so as to ensure that the hydrogen production system maintains a pressure balance and a liquid level balance between the oxygen production side and the hydrogen production side at all times. In addition, since the control device is also provided for controlling the hydrogen production device based on the actual current change, it is possible to avoid a drastic change in hydrogen production at any time, resulting in a lag in the control of the first actual pressure and the first actual liquid level corresponding to the oxygen production side of the hydrogen production device, and the second actual liquid level and the second actual pressure corresponding to the hydrogen production side, thereby causing the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to fluctuate beyond a safety threshold, thereby causing a safety risk to the hydrogen production system.

[0093] In one embodiment of the present application, Figure 2 As shown, a hydrogen production system is provided, wherein the hydrogen production equipment 1 comprises: a hydrogen production equipment 1 and a control device 2,

[0094] The hydrogen production equipment 1 is used to ionize water to produce hydrogen and oxygen.

[0095] In an optional embodiment of the present application, the hydrogen production equipment 1 includes:

[0096] The electrolytic tank 11 is used to hold water.

[0097] The power supply 12 is connected to the electrolytic cell 11 and is used to ionize the water in the electrolytic cell 11 to generate hydrogen and oxygen.

[0098] The power supply 12 may be a DC power supply 12 .

[0099] The oxygen-side gas-liquid separator 13 is connected to the electrolytic cell 11 and is used to separate the oxygen and water generated by ionization.

[0100] The hydrogen-side gas-liquid separator 14 is connected to the electrolytic cell 11 and is used to separate the hydrogen and water generated by ionization.

[0101] The oxygen-side regulating valve 15 is used to change the valve opening under the control of the control device 2 to ensure the safety of the hydrogen production equipment 1.

[0102] The hydrogen-side regulating valve 16 is used to change the valve opening under the control of the control device 2 to ensure the safety of the hydrogen production equipment 1.

[0103] The oxygen-side liquid level sensor 17 is communicatively connected to the control device 2 , and is configured to measure a first actual liquid level corresponding to the oxygen-side gas-liquid separator 13 , and transmit the first actual liquid level to the control device 2 .

[0104] The hydrogen-side liquid level sensor 18 is communicatively connected to the control device 2 , and is used to measure a second actual liquid level corresponding to the hydrogen-side gas-liquid separator 14 , and transmit the second actual liquid level to the control device 2 .

[0105] The oxygen-side separator pressure transmitter 19 is communicatively connected to the control device 2 , and is configured to measure a first actual pressure corresponding to the oxygen-side gas-liquid separator 13 , and transmit the first actual pressure to the control device 2 .

[0106] The hydrogen-side separator pressure transmitter 110 is communicatively connected to the control device 2 , and is used to measure a second actual pressure corresponding to the hydrogen-side gas-liquid separator 14 , and transmit the second actual pressure to the control device 2 .

[0107] The current sensor 111 is in communication with the control device 2 , and is configured to measure the actual current of the power supply 12 in real time and transmit the actual current to the control device 2 .

[0108] The control device 2 is further configured to calculate the actual current change corresponding to the hydrogen production device 1 in real time based on the actual current received in real time.

[0109] Specifically, if Figure 2As shown in the figure, the solid line represents the material flow, the dotted line represents the signal flow, and the arrow indicates the flow direction. In this hydrogen production system, the hydrogen production equipment 1 includes an oxygen-side gas-liquid separator 13 and a hydrogen-side gas-liquid separator 14, a U-shaped tube formed by a bottom connecting pipe, and an electrolyzer 11. The actuators of the hydrogen production equipment 1 are an oxygen-side regulating valve 15 and a hydrogen-side regulating valve 16, wherein the oxygen-side regulating valve 15 and the hydrogen-side regulating valve 16 can be pneumatic diaphragm regulating valves. An oxygen-side liquid level sensor 17 and an oxygen-side separator pressure transmitter 19 are installed on the oxygen-side gas-liquid separator 13, and a hydrogen-side liquid level sensor 18 and a hydrogen-side separator pressure transmitter 110 are installed on the hydrogen-side gas-liquid separator 14. A current sensor 111 is installed on the power supply 12.

[0110] Its operating principle is as follows: Power supply 12 ionizes water in electrolytic cell 11, generating oxygen and hydrogen. The generated oxygen and water can enter oxygen-side gas-liquid separator 13 together, which separates the oxygen and water. The oxygen is output through oxygen-side regulating valve 15, and the separated water flows back to electrolytic cell 11 through a U-shaped tube. Similarly, the generated hydrogen and water can enter hydrogen-side gas-liquid separator 14 together, which separates the hydrogen and water. The hydrogen is output through hydrogen-side regulating valve 16, and the separated water flows back to electrolytic cell 11 through a U-shaped tube.

[0111] Oxygen-side liquid level sensor 17 measures the first actual liquid level corresponding to oxygen-side gas-liquid separator 13 in hydrogen production equipment 1 and transmits the first actual liquid level to control device 2. Oxygen-side separator pressure transmitter 19 measures the first actual pressure corresponding to oxygen-side gas-liquid separator 13 in hydrogen production equipment 1 and transmits the first actual pressure to control device 2. Hydrogen-side liquid level sensor 18 measures the second actual liquid level corresponding to hydrogen-side gas-liquid separator 14 in hydrogen production equipment 1 and transmits the second actual liquid level to control device 2. Hydrogen-side separator pressure transmitter 110 measures the second actual pressure corresponding to hydrogen-side gas-liquid separator 14 in hydrogen production equipment 1 and transmits the second actual pressure to control device 2.

[0112] The current sensor 111 measures the actual current of the power source 12 in real time and transmits the actual current to the control device 2. The control device 2 calculates the actual current change corresponding to the hydrogen production device 1 in real time based on the actual current received in real time.

[0113] Control device 2, used to obtain a first actual pressure and a first actual liquid level corresponding to the oxygen generating side of hydrogen production equipment 1, and a second actual liquid level corresponding to the hydrogen generating side, and to monitor in real time the actual current change corresponding to hydrogen production equipment 1;

[0114] The control device 2 is further configured to control the hydrogen production device 1 according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current variation, so as to ensure the safety of the hydrogen production device 1 .

[0115] In an optional embodiment of the present application, Figure 3 As shown, the control device 2 is used to obtain a preset current change threshold corresponding to the hydrogen production equipment 1; compare the actual current change with the preset current change threshold; when the actual current change is greater than the preset current change threshold, calculate the hydrogen production rate change corresponding to the hydrogen production equipment 1 according to the actual current change; and adjust the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 according to the hydrogen production rate change.

[0116] Specifically, the control device 2 can receive a preset current change threshold value input by the user, or can receive a preset current change threshold value sent by other devices, or can set the preset current change threshold value according to the magnitude of the current output by the power supply 12. The embodiment of the present application does not specifically limit the manner in which the control device 2 obtains the preset current change threshold value.

[0117] After obtaining the preset current change threshold, control device 2 may compare the actual current change with the preset current change threshold. When the actual current change is greater than the preset current change threshold, the corresponding hydrogen production rate change of hydrogen production device 1 is calculated based on the actual current change.

[0118] For example, the control device 2 can calculate the change in hydrogen production rate corresponding to the hydrogen production device 1 according to the following formula: When the actual current change is ΔI, according to Dalady's law, the change in hydrogen production rate can be calculated by the following formula:

[0119]

[0120] Where V mal is the volume of each mole of hydrogen under this working condition. Under standard conditions, the volume of 1 mol of hydrogen is 22.43*10-3m3; F is the Faraday constant, which is 96500C / mol; n is the number of electrons gained or lost in the electrolytically precipitated substance, which is 2 here.

[0121] After calculating the change in hydrogen production rate, the control device 2 can adjust the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production device 1 according to the change in hydrogen production rate.

[0122] In an optional embodiment of the present application, the control device 2 is used to obtain the actual hydrogen production rate corresponding to the hydrogen production equipment 1; and adjust the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 according to the relationship between the change in the hydrogen production rate and the actual hydrogen production rate.

[0123] Specifically, after calculating the change in hydrogen production rate corresponding to hydrogen production equipment 1, control device 2 can measure the actual hydrogen production rate corresponding to hydrogen production equipment 1. Then, based on the relationship between the change in hydrogen production rate and the actual hydrogen production rate, the valve openings corresponding to oxygen-side regulating valve 15 and hydrogen-side regulating valve 16 are calculated. Based on the valve openings corresponding to oxygen-side regulating valve 15 and hydrogen-side regulating valve 16, the oxygen-side regulating valve 15 and hydrogen-side regulating valve 16 corresponding to hydrogen production equipment 1 are adjusted.

[0124] For example, based on the relationship between the change in hydrogen production rate and the actual hydrogen production rate, the formula for calculating the valve openings of the oxygen-side regulating valve 15 and the hydrogen-side regulating valve 16 can be as follows:

[0125]

[0126] Where A is the opening coefficient, Q is the real-time hydrogen production rate,

[0127] In an optional embodiment of the present application, after the control device 2 adjusts the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 according to the change in the hydrogen production rate, the control device 2 is also used to obtain a first set pressure corresponding to the oxygen-producing side of the hydrogen production system; and adjust the oxygen side regulating valve 15 according to the difference between the first actual pressure and the first set pressure.

[0128] Specifically, the control device 2 can receive the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system input by the user, or it can receive the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system sent by other devices, and can also set the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system according to the amount of hydrogen generated by the hydrogen production system. The embodiment of the present application does not specifically limit the manner in which the control device 2 obtains the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system.

[0129] After obtaining the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system, the control device 2 can calculate the difference between the first actual pressure and the first set pressure, and then use the preset control method to adjust the oxygen-side regulating valve 15 according to the difference between the first actual pressure and the first set pressure to reduce the difference between the first actual pressure and the first set pressure, so that the first actual pressure is close to the first set pressure to ensure the pressure balance on both sides of the hydrogen production equipment 1.

[0130] The preset control method may be any one of feedback control, PID control, and synovial control.

[0131] In an optional embodiment of the present application, after the control device 2 adjusts the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 according to the change in the hydrogen production rate, the control device 2 is also used to calculate the actual liquid level difference between the first actual liquid level and the second actual liquid level; obtain the set liquid level difference corresponding to the actual liquid level difference; and adjust the hydrogen side regulating valve 16 according to the difference between the actual liquid level difference and the set liquid level difference.

[0132] Specifically, the control device 2 can calculate the actual liquid level difference between the first actual liquid level and the second actual liquid level. The control device 2 can then receive a set liquid level difference corresponding to the actual liquid level difference input by a user, or can receive a set liquid level difference corresponding to the actual liquid level difference sent by another device. The control device 2 can also set the set liquid level difference corresponding to the actual liquid level difference based on the amount of hydrogen generated by the hydrogen production system. The embodiment of the present application does not specifically limit the manner in which the control device 2 obtains the set liquid level difference corresponding to the actual liquid level difference.

[0133] After obtaining the set liquid level difference corresponding to the actual liquid level difference, the control device 2 can calculate the difference between the actual liquid level difference and the set liquid level difference. Then, using a preset control method, the hydrogen-side regulating valve 16 is adjusted based on the difference between the actual liquid level difference and the set liquid level difference to reduce the difference between the actual liquid level difference and the set liquid level difference, thereby making the actual liquid level difference close to the set liquid level difference, thereby ensuring liquid level balance on both sides of the hydrogen production equipment 1.

[0134] The preset control method may be any one of feedback control, PID control, and synovial control.

[0135] The hydrogen production system provided in an embodiment of the present invention includes hydrogen production equipment including: an electrolytic cell 11, which is used to hold water; a power supply 12, connected to the electrolytic cell 11, and used to ionize the water in the electrolytic cell 11; an oxygen-side gas-liquid separator 13, connected to the electrolytic cell 11, and used to separate the oxygen and water generated by ionization; and a hydrogen-side gas-liquid separator 14, connected to the electrolytic cell 11, and used to separate the hydrogen and water generated by ionization, thereby ionizing water to generate oxygen and hydrogen.

[0136] The hydrogen production equipment also includes: an oxygen side regulating valve 15, which is used to change the valve opening under the control of the control device 2 to ensure the safety of the hydrogen production equipment 1; a hydrogen side regulating valve 16, which is used to change the valve opening under the control of the control device 2 to ensure the safety of the hydrogen production equipment 1. By controlling the oxygen side regulating valve 15 and the hydrogen side regulating valve 16, the liquid level balance and pressure balance on both sides of the hydrogen production equipment 1 are guaranteed, thereby ensuring the safety of the hydrogen production system.

[0137] The hydrogen production equipment 1 also includes: an oxygen-side liquid level sensor 17, which is in communication with the control device 2 and is used to measure a first actual liquid level and transmit the first actual liquid level to the control device 2; thereby ensuring the accuracy of the first actual liquid level obtained by the control device 2. A hydrogen-side liquid level sensor 18, which is in communication with the control device 2 and is used to measure a second actual liquid level and transmit the second actual liquid level to the control device 2; thereby ensuring the accuracy of the second actual liquid level obtained by the control device 2. An oxygen-side separator pressure transmitter 19, which is in communication with the control device 2 and is used to measure a first actual pressure and transmit the first actual pressure to the control device 2; thereby ensuring the accuracy of the first actual pressure obtained by the control device 2. A hydrogen-side separator pressure transmitter 110, which is in communication with the control device 2 and is used to measure a second actual pressure corresponding to the side where hydrogen is produced and transmit the second actual pressure to the control device 2; thereby ensuring the accuracy of the second actual pressure obtained by the control device 2. The current sensor 111 is communicatively connected to the control device 2 and is used to measure the actual current of the power supply 12 in real time and transmit the actual current to the control device 2. The control device 2 is also used to calculate the actual current change corresponding to the hydrogen production device 1 in real time based on the actual current received in real time, thereby ensuring the accuracy of the calculated actual current change. This can ensure the accuracy of the control device 2 controlling the hydrogen production device 1 based on the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change. This can avoid the possibility of drastic changes in hydrogen production at any time, resulting in a lag in the control of the first actual pressure and the first actual liquid level corresponding to the oxygen-producing side of the hydrogen production device 1, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen-producing side, thereby causing fluctuations in the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level exceeding the safety threshold, thereby causing safety risks to the hydrogen production system.

[0138] The hydrogen production system provided in an embodiment of the present invention obtains a preset current change threshold corresponding to the hydrogen production equipment 1; compares the actual current change with the preset current change threshold, thereby ensuring the accuracy of the comparison result. When the actual current change is greater than the preset current change threshold, the hydrogen production rate change corresponding to the hydrogen production equipment 1 is calculated based on the actual current change, thereby ensuring the accuracy of the calculated hydrogen production rate change corresponding to the hydrogen production equipment 1. Then, the actual hydrogen production rate corresponding to the hydrogen production equipment 1 is obtained; based on the relationship between the hydrogen production rate change and the actual hydrogen production rate, the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 are adjusted, thereby ensuring the accuracy of the adjustment of the oxygen side regulating valve 15 and the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1. This avoids excessive changes in the actual current of the hydrogen production equipment 1, which may cause drastic changes in the hydrogen production volume at any time, and a phenomenon of control lag of the first actual pressure and the first actual liquid level corresponding to the oxygen-producing side of the hydrogen production equipment 1, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen-producing side, which may cause fluctuations in the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to exceed the safety threshold, thereby causing safety risks to the hydrogen production system exceeding the safety threshold.

[0139] Furthermore, when the actual current variation exceeds a preset current variation threshold, the control device 2 obtains a first set pressure corresponding to the oxygen-producing side of the hydrogen production system; based on the difference between the first actual pressure and the first set pressure, the control device 2 adjusts the oxygen-side regulating valve 15, thereby ensuring accuracy in regulating the oxygen-side regulating valve 15. This ensures pressure balance on both sides of the hydrogen production equipment 1.

[0140] Furthermore, when the actual current variation is greater than a preset current variation threshold, control device 2 calculates the actual liquid level difference between the first actual liquid level and the second actual liquid level, ensuring the accuracy of the calculated actual liquid level difference. A set liquid level difference corresponding to the actual liquid level difference is obtained. Based on the difference between the actual liquid level difference and the set liquid level difference, hydrogen-side regulating valve 16 is adjusted, ensuring accuracy in regulating hydrogen-side regulating valve 16 and thereby achieving liquid level balance on both sides of hydrogen production equipment 1.

[0141] In an optional embodiment of the present application, a preset current change threshold corresponding to the hydrogen production equipment 1 is obtained; the actual current change is compared with the preset current change threshold; when the actual current change is less than or equal to the preset current change threshold, a first set pressure corresponding to the oxygen producing side of the hydrogen production system is obtained; according to the difference between the first actual pressure and the first set pressure, the oxygen side regulating valve 15 corresponding to the hydrogen production equipment 1 is adjusted; the actual liquid level difference between the first actual liquid level and the second actual liquid level is calculated; the set liquid level difference corresponding to the actual liquid level difference is obtained; and according to the difference between the actual liquid level difference and the set liquid level difference, the hydrogen side regulating valve 16 corresponding to the hydrogen production equipment 1 is adjusted.

[0142] Specifically, the control device 2 can receive a preset current change threshold value input by the user, or can receive a preset current change threshold value sent by other devices, or can set the preset current change threshold value according to the magnitude of the current output by the power supply 12. The embodiment of the present application does not specifically limit the manner in which the control device 2 obtains the preset current change threshold value.

[0143] After obtaining the preset current variation threshold, the control device 2 may compare the actual current variation with the preset current variation threshold. When the actual current variation is less than or equal to the preset current variation threshold, the control device 2 may receive the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system input by the user, or may receive the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system sent by other devices. The control device 2 may also set the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system based on the amount of hydrogen generated by the hydrogen production system. The embodiment of the present application does not specifically limit the manner in which the control device 2 obtains the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system.

[0144] After obtaining the first set pressure corresponding to the hydrogen-side gas-liquid separator 14 corresponding to the hydrogen production system, the control device 2 can calculate the difference between the first actual pressure and the first set pressure, and then use the preset control method to adjust the oxygen-side regulating valve 15 according to the difference between the first actual pressure and the first set pressure to reduce the difference between the first actual pressure and the first set pressure, so that the first actual pressure is close to the first set pressure to ensure the pressure balance on both sides of the hydrogen production equipment 1.

[0145] The preset control method may be any one of feedback control, PID control, and synovial control.

[0146] In addition, the control device 2 can also calculate the actual liquid level difference between the first actual liquid level and the second actual liquid level. Then, the control device 2 can receive a set liquid level difference corresponding to the actual liquid level difference input by the user, or can receive a set liquid level difference corresponding to the actual liquid level difference sent by other devices. The control device 2 can also set the set liquid level difference corresponding to the actual liquid level difference based on the amount of hydrogen generated by the hydrogen production system. The embodiment of the present application does not specifically limit the manner in which the control device 2 obtains the set liquid level difference corresponding to the actual liquid level difference.

[0147] After obtaining the set liquid level difference corresponding to the actual liquid level difference, the control device 2 can calculate the difference between the actual liquid level difference and the set liquid level difference. Then, using a preset control method, the hydrogen-side regulating valve 16 is adjusted based on the difference between the actual liquid level difference and the set liquid level difference to reduce the difference between the actual liquid level difference and the set liquid level difference, thereby making the actual liquid level difference close to the set liquid level difference, thereby ensuring liquid level balance on both sides of the hydrogen production equipment 1.

[0148] The preset control method may be any one of feedback control, PID control, and synovial control.

[0149] The hydrogen production system provided in an embodiment of the present invention compares the actual current change with a preset current change threshold, ensuring the accuracy of the comparison result. When the actual current change is less than or equal to the preset current change threshold, a first set pressure corresponding to the oxygen-producing side of the hydrogen production system is obtained. Based on the difference between the first actual pressure and the first set pressure, the oxygen-side regulating valve 15 corresponding to the hydrogen production equipment 1 is adjusted, ensuring the accuracy of the adjustment of the oxygen-side regulating valve 15. This ensures pressure balance on both sides of the hydrogen production equipment 1.

[0150] The actual liquid level difference between the first actual liquid level and the second actual liquid level is calculated to ensure the accuracy of the calculated actual liquid level difference. A set liquid level difference corresponding to the actual liquid level difference is obtained; and the hydrogen-side regulating valve 16 is adjusted based on the difference between the actual liquid level difference and the set liquid level difference, ensuring the accuracy of the adjustment of the hydrogen-side regulating valve 16, thereby achieving liquid level balance on both sides of the hydrogen production equipment 1.

[0151] In order to better illustrate the hydrogen production system provided by the embodiment of the present application, the embodiment of the present application provides an overall process of a hydrogen production system control method, such as Figure 4 As shown, the control device applied to the hydrogen production system in any one of the above embodiments includes:

[0152] S11. Obtain a first actual pressure and a first actual liquid level corresponding to a side where oxygen is generated by a hydrogen production device in a hydrogen production system, and a second actual liquid level corresponding to a side where hydrogen is generated, and monitor in real time an actual current change corresponding to the hydrogen production device.

[0153] S12. Control the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change to ensure the safety of the hydrogen production equipment.

[0154] For an introduction to the control method of the hydrogen production system, please refer to the introduction to the hydrogen production system in the above embodiment, which will not be repeated here.

[0155] The hydrogen production system control method provided in an embodiment of the present invention obtains a first actual pressure and a first actual liquid level corresponding to the oxygen-generating side of the hydrogen production equipment in the hydrogen production system, as well as a second actual liquid level corresponding to the hydrogen-generating side, and monitors the actual current change corresponding to the hydrogen production equipment in real time. The hydrogen production equipment is controlled based on the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change to ensure the safety of the hydrogen production equipment. This ensures that the hydrogen production system maintains a pressure balance and a liquid level balance between the oxygen-generating side and the hydrogen-generating side at all times. In addition, because the control device is also used to control the hydrogen production equipment based on the actual current change, it can avoid the possibility of drastic changes in hydrogen production at any time, which may cause the first actual pressure and the first actual liquid level corresponding to the oxygen-generating side of the hydrogen production equipment, as well as the second actual liquid level and the second actual pressure corresponding to the hydrogen-generating side, to lag in control. This may cause the first actual pressure, the second actual pressure, the first actual liquid level, and the second actual liquid level to fluctuate beyond a safety threshold, thereby causing a safety risk to the hydrogen production system.

[0156] It should be understood that although Figure 4 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 4 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The order of execution of these steps or stages is not necessarily one by one, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0157] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A hydrogen production system, characterized in that: The hydrogen production system includes: hydrogen production equipment and control equipment, wherein: The hydrogen production equipment is used to ionize water to produce hydrogen and oxygen; The control device is used to obtain a first actual pressure and a first actual liquid level corresponding to the side of the hydrogen production equipment that produces oxygen, and a second actual liquid level corresponding to the side that produces hydrogen, and to monitor in real time the actual current change corresponding to the hydrogen production equipment; The control device is further configured to control the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change, so as to ensure the safety of the hydrogen production equipment; Wherein, the control device is used to obtain a preset current change threshold corresponding to the hydrogen production equipment; Comparing the actual current change with the preset current change threshold; When the actual current change is greater than the preset current change threshold, the hydrogen production rate change corresponding to the hydrogen production equipment is calculated based on the following formula according to the actual current change; Where, is the volume of each mole of hydrogen under this working condition. Under standard conditions, the volume of 1 mol of hydrogen is ; F is the Faraday constant, which is 96500C / mol, and n is the number of electrons gained or lost during electrolysis; Obtaining an actual hydrogen production rate corresponding to the hydrogen production equipment; According to the relationship between the change in the hydrogen production rate and the actual hydrogen production rate, the valve openings of the oxygen-side regulating valve and the hydrogen-side regulating valve corresponding to the hydrogen production equipment are calculated based on the following formula; Where A is the opening coefficient and Q is the real-time hydrogen production rate.

2. The hydrogen production system according to claim 1, characterized in that: The control device is also used to obtain a first set pressure corresponding to the oxygen-producing side of the hydrogen production system; and use a first preset control method to adjust the oxygen-side regulating valve according to the difference between the first actual pressure and the first set pressure; the first preset control method is any one of feedback control, PID control, and sliding film control.

3. The hydrogen production system according to claim 1, characterized in that: The control device is further configured to calculate an actual liquid level difference between the first actual liquid level and the second actual liquid level; Obtaining a set liquid level difference corresponding to the actual liquid level difference; The hydrogen side regulating valve is adjusted according to the difference between the actual liquid level difference and the set liquid level difference using a second preset control method; the second preset control method is any one of feedback control, PID control, and sliding film control.

4. The hydrogen production system according to claim 1, characterized in that: The control device is used to obtain a preset current change threshold corresponding to the hydrogen production equipment; Comparing the actual current change with the preset current change threshold; When the actual current change is less than or equal to the preset current change threshold, obtaining a first set pressure corresponding to the oxygen-producing side of the hydrogen production system; and adjusting the oxygen-side regulating valve corresponding to the hydrogen production equipment according to the difference between the first actual pressure and the first set pressure using a third preset control method; the third preset control method being any one of feedback control, PID control, and sliding film control; calculating an actual liquid level difference between the first actual liquid level and the second actual liquid level; Obtaining a set liquid level difference corresponding to the actual liquid level difference; The hydrogen side regulating valve corresponding to the hydrogen production equipment is adjusted according to the difference between the actual liquid level difference and the set liquid level difference using a fourth preset control method; the fourth preset control method is any one of feedback control, PID control, and sliding film control.

5. The hydrogen production system according to claim 1, characterized in that: The hydrogen production equipment comprises: an electrolytic cell, the electrolytic cell being used to hold water; a power supply connected to the electrolytic cell and configured to ionize water in the electrolytic cell to generate hydrogen and oxygen; an oxygen-side gas-liquid separator connected to the electrolytic cell and used to separate the oxygen and water produced by ionization; The hydrogen-side gas-liquid separator is connected to the electrolyzer and is used to separate the hydrogen and water generated by ionization.

6. The hydrogen production system according to claim 5, characterized in that: The hydrogen production equipment further comprises: An oxygen-side regulating valve, used to change the valve opening under the control of the control device to ensure the safety of the hydrogen production equipment; The hydrogen side regulating valve is used to change the valve opening under the control of the control device to ensure the safety of the hydrogen production equipment.

7. The hydrogen production system according to claim 6, characterized in that: The hydrogen production equipment further comprises: an oxygen-side liquid level sensor, communicatively connected to the control device, configured to measure the first actual liquid level corresponding to the oxygen-side gas-liquid separator and transmit the first actual liquid level to the control device; a hydrogen-side liquid level sensor, communicatively connected to the control device, configured to measure the second actual liquid level corresponding to the hydrogen-side gas-liquid separator and transmit the second actual liquid level to the control device; an oxygen-side separator pressure transmitter, communicatively connected to the control device, configured to measure the first actual pressure corresponding to the oxygen-side gas-liquid separator and transmit the first actual pressure to the control device; a hydrogen-side separator pressure transmitter, communicatively connected to the control device, configured to measure the second actual pressure corresponding to the hydrogen-side gas-liquid separator and transmit the second actual pressure to the control device; a current sensor, communicatively connected to the control device, for measuring the actual current of the power supply in real time and transmitting the actual current to the control device; The control device is further configured to calculate, in real time, the actual current variation corresponding to the hydrogen production equipment based on the actual current received in real time.

8. A hydrogen production system control method, characterized in that: The control device applied to the hydrogen production system according to any one of claims 1 to 7, the method comprising: Obtaining a first actual pressure and a first actual liquid level corresponding to a side where oxygen is generated by the hydrogen production equipment in the hydrogen production system, and a second actual liquid level corresponding to a side where hydrogen is generated, and monitoring in real time an actual current change corresponding to the hydrogen production equipment; controlling the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change to ensure safety of the hydrogen production equipment; The controlling of the hydrogen production equipment according to the first actual pressure, the first actual liquid level, the second actual liquid level, and the actual current change includes: Obtaining a preset current change threshold corresponding to the hydrogen production equipment; Comparing the actual current change with the preset current change threshold; When the actual current change is greater than the preset current change threshold, the hydrogen production rate change corresponding to the hydrogen production equipment is calculated based on the following formula according to the actual current change; Where, is the volume of each mole of hydrogen under this working condition. Under standard conditions, the volume of 1 mol of hydrogen is ; F is the Faraday constant, which is 96500C / mol, and n is the number of electrons gained or lost during electrolysis; Obtaining an actual hydrogen production rate corresponding to the hydrogen production equipment; According to the relationship between the change in the hydrogen production rate and the actual hydrogen production rate, the valve openings of the oxygen-side regulating valve and the hydrogen-side regulating valve corresponding to the hydrogen production equipment are calculated based on the following formula; Where A is the opening coefficient and Q is the real-time hydrogen production rate.

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