Electrolysis equipment, hydrogen production system and hydrogen production station

Abstract

The invention discloses electrolysis equipment, a hydrogen production system and a hydrogen production station, and belongs to the field of water electrolysis hydrogen production. The electrolysis apparatus includes: an electrolytic cell; the hydrogen side pressure detection device is used for detecting the hydrogen side outlet pressure of the electrolytic bath; the oxygen side pressure detection device is used for detecting the oxygen side outlet pressure of the electrolytic bath; the pressure-adjustable hydrogen side pressure equalizing device is connected with a hydrogen side outlet of the electrolytic bath through a hydrogen side safety control valve; the pressure-adjustable oxygen side pressure equalizing device is connected with an oxygen side outlet of the electrolytic bath through an oxygen side safety control valve; the controller is electrically connected with the hydrogen side pressure detection device, the oxygen side pressure detection device, the hydrogen side pressure equalizing device, the oxygen side pressure equalizing device, the hydrogen side safety control valve and the oxygen side safety control valve, and is configured to adjust the pressure of the oxygen side pressure equalizing device based on the hydrogen side outlet pressure and adjust the pressure of the hydrogen side pressure equalizing device based on the oxygen side outlet pressure; the opening and closing states of the hydrogen side safety control valve and the oxygen side safety control valve are controlled based on the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen production by water electrolysis, and particularly relates to an electrolysis device, a hydrogen production system and a hydrogen production station. BACKGROUND

[0002] Hydrogen production by water electrolysis is a representative method in the field of new energy hydrogen production, and has been widely applied. In a hydrogen production by water electrolysis system, multiple electrolytic cells are usually matched with a single gas-liquid separation device. The pressure equalization control system and the safety relief system in the related art are usually arranged in the gas-liquid separation device.

[0003] When the communication between the electrolytic cell in the working state and the gas-liquid separation device is mistakenly closed, the pressure equalization control system and the safety relief system in the gas-liquid separation device cannot control the pressure equalization and pressure relief of the electrolytic cell in operation, which may cause a too large pressure difference between the hydrogen side and the oxygen side in the electrolytic cell, and even cause damage or explosion of the electrolytic cell and other serious problems. The electrolytic cell can only realize pressure equalization and pressure relief control when it is in communication with the gas-liquid separation device. This method has poor safety and room for improvement. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides an electrolysis device, a hydrogen production system and a hydrogen production station, which control the pressure of the pressure equalization device on the side by the pressure on the opposite side of the electrolytic cell. In this way, the pressure relief is smooth and safe, and the diaphragm deforms slowly during the pressure relief process, so that the diaphragm is not easily damaged, ensuring the high reliability of the electrolysis device.

[0005] In a first aspect, the present application provides an electrolysis device, comprising:

[0006] an electrolytic cell;

[0007] a hydrogen side pressure detection device for detecting the hydrogen side outlet pressure of the electrolytic cell;

[0008] an oxygen side pressure detection device for detecting the oxygen side outlet pressure of the electrolytic cell;

[0009] a pressure-adjustable hydrogen side pressure equalization device connected to the hydrogen side outlet of the electrolytic cell through a hydrogen side safety control valve;

[0010] a pressure-adjustable oxygen side pressure equalization device connected to the oxygen side outlet of the electrolytic cell through an oxygen side safety control valve;

[0011] A controller electrically connected with the hydrogen-side pressure detection device, the oxygen-side pressure detection device, the hydrogen-side pressure equalization device, the oxygen-side pressure equalization device, the hydrogen-side safety control valve and the oxygen-side safety control valve, configured to adjust the pressure of the oxygen-side pressure equalization device based on the hydrogen-side outlet pressure, adjust the pressure of the hydrogen-side pressure equalization device based on the oxygen-side outlet pressure, and control the opening and closing states of the hydrogen-side safety control valve and the oxygen-side safety control valve based on the pressure difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure.

[0012] According to the electrolysis equipment, the pressure of the pressure equalization device on the side is controlled by the pressure on the opposite side of the electrolysis cell, so that when the pressure on the side is released, the pressure is released smoothly, the safety is high, the diaphragm deforms slowly during the pressure release process, the diaphragm is not easy to be damaged, and the high reliability of the electrolysis equipment is ensured.

[0013] According to an embodiment of the present application, the controller is configured to control the hydrogen-side safety control valve to open when the pressure difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure is greater than a first pressure difference value, and control the oxygen-side safety control valve to open when the pressure difference between the oxygen-side outlet pressure and the hydrogen-side outlet pressure is greater than a second pressure difference value.

[0014] According to one embodiment of the present application, the controller comprises: a first comparator, electrically connected with the hydrogen-side pressure detection device and the oxygen-side pressure equalization device, for comparing the pressure of the oxygen-side pressure equalization device with the hydrogen-side outlet pressure; a first processor, electrically connected with the first comparator, for outputting a first control instruction based on the comparison result, the first control instruction being used to control the oxygen-side pressure equalization device; a second comparator, electrically connected with the oxygen-side pressure detection device and the hydrogen-side pressure equalization device, for comparing the pressure of the hydrogen-side pressure equalization device with the oxygen-side outlet pressure; a second processor, electrically connected with the second comparator, for outputting a second control instruction based on the comparison result, the second control instruction being used to control the hydrogen-side pressure equalization device; a first subtractor, electrically connected with the hydrogen-side pressure detection device and the oxygen-side pressure detection device, for determining a first difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure; a third comparator, electrically connected with the first subtractor, for comparing the first difference with the first pressure difference; a third processor, electrically connected with the third comparator, for outputting a third control instruction based on the comparison result, the third control instruction being used to control the hydrogen-side safety control valve; a second subtractor, electrically connected with the oxygen-side pressure detection device and the hydrogen-side pressure detection device, for determining a second difference between the oxygen-side outlet pressure and the hydrogen-side outlet pressure; a fourth comparator, electrically connected with the second subtractor, for comparing the second difference with the second pressure difference; and a fourth processor, electrically connected with the fourth comparator, for outputting a fourth control instruction based on the comparison result, the fourth control instruction being used to control the oxygen-side safety control valve.

[0015] According to one embodiment of the present application, the first pressure difference and the second pressure difference are both less than the diaphragm pressure resistance of the electrolytic cell.

[0016] According to one embodiment of the present application, the controller is electrically connected with the electrolytic cell and is configured to control the electrolytic cell to stop in the case that the hydrogen-side outlet pressure is greater than a first alarm pressure, and the first alarm pressure is less than the maximum design pressure of the electrolytic cell; and / or, the controller is electrically connected with the electrolytic cell and is configured to control the electrolytic cell to stop in the case that the oxygen-side outlet pressure is greater than a second alarm pressure, and the second alarm pressure is less than the maximum design pressure of the electrolytic cell.

[0017] According to one embodiment of the present application, the controller is electrically connected with the electrolytic cell and is configured to control the electrolytic cell to stop in the case that the absolute value of the pressure difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure is greater than a third pressure difference, and the third pressure difference is less than the maximum design pressure of the electrolytic cell.

[0018] According to one embodiment of the present application, the controller is configured to control the hydrogen-side pressure equalization device to stop pressure increasing when the pressure of the hydrogen-side pressure equalization device is greater than a third alarm pressure; and / or, the controller is configured to control the oxygen-side pressure equalization device to stop pressure increasing when the pressure of the oxygen-side pressure equalization device is greater than a fourth alarm pressure.

[0019] According to one embodiment of the present application, the hydrogen-side pressure equalization device comprises: a hydrogen-side pressure equalization tank, an inlet of the hydrogen-side pressure equalization tank being connected to a gas source through a hydrogen-side gas inlet control valve, the gas source being configured to provide nitrogen or inert gas, an outlet of the hydrogen-side pressure equalization tank being connected to a hydrogen-side outlet of the electrolytic tank through the hydrogen-side safety control valve, and a vent of the hydrogen-side pressure equalization tank being connected to the outside through a hydrogen-side gas outlet control valve; a hydrogen-side pressure equalization tank pressure detection device configured to detect the pressure of the hydrogen-side pressure equalization tank; wherein the controller is electrically connected to the hydrogen-side gas inlet control valve, the hydrogen-side gas outlet control valve, and the hydrogen-side pressure equalization tank pressure detection device; and / or, the oxygen-side pressure equalization device comprises: an oxygen-side pressure equalization tank, an inlet of the oxygen-side pressure equalization tank being connected to a gas source through an oxygen-side gas inlet control valve, the gas source being configured to provide nitrogen or inert gas, an outlet of the oxygen-side pressure equalization tank being connected to an oxygen-side outlet of the electrolytic tank through the oxygen-side safety control valve, and a vent of the oxygen-side pressure equalization tank being connected to the outside through an oxygen-side gas outlet control valve; an oxygen-side pressure equalization tank pressure detection device configured to detect the pressure of the oxygen-side pressure equalization tank; wherein the controller is electrically connected to the oxygen-side gas inlet control valve, the oxygen-side gas outlet control valve, and the oxygen-side pressure equalization tank pressure detection device.

[0020] In a second aspect, the present application provides a hydrogen production system, comprising:

[0021] Any one of the above electrolytic devices.

[0022] According to the hydrogen production system of the present application, the pressure of the pressure equalization device on one side of the electrolytic tank is controlled by the pressure on the other side of the electrolytic tank, so that the pressure relief is smooth and safe when the pressure on the side is relieved, and the diaphragm is slowly deformed during the pressure relief process, so that the diaphragm is not easily damaged, thereby ensuring high reliability of the hydrogen production system.

[0023] In a third aspect, the present application provides a hydrogen production station, comprising:

[0024] The above hydrogen production system;

[0025] A new energy power generation device, the new energy power generation device being configured to supply power to the hydrogen production system.

[0026] According to the hydrogen production station provided in the application, the new energy power generation device is used to supply power to the hydrogen production system, so that the electrolysis equipment in the hydrogen production system can use electric energy to carry out water electrolysis hydrogen production reaction. In this way, the hydrogen production station can fully utilize new energy power to produce hydrogen, thereby reducing the dependence on traditional fossil energy and helping to reduce carbon emissions.

[0027] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0029] Figure 1 is a structural schematic diagram of the electrolysis equipment provided in the embodiments of the application.

[0030] REFERENCE NUMERALS

[0031] Hydrogen production system 1, electrolysis equipment 10;

[0032] Electrolytic cell 110;

[0033] Hydrogen side pressure detection device 120;

[0034] Oxygen side pressure detection device 130;

[0035] Pressure-adjustable hydrogen side pressure equalization device 140, hydrogen side safety control valve 141, hydrogen side pressure equalization tank 142, hydrogen side pressure equalization tank pressure detection device 1421, hydrogen side gas inlet control valve 143, hydrogen side gas outlet control valve 144;

[0036] Pressure-adjustable oxygen side pressure equalization device 150, oxygen side safety control valve 151, oxygen side pressure equalization tank 152, oxygen side pressure equalization tank pressure detection device 1521, oxygen side gas inlet control valve 153, oxygen side gas outlet control valve 154;

[0037] Controller 160. DETAILED DESCRIPTION

[0038] The embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation of the application.

[0039] The following description refers to the accompanying drawings. Figure 1 The electrolysis equipment, hydrogen production system and hydrogen production station according to the embodiments of the application are described.

[0040] AsFigure 1 As shown, the electrolysis apparatus 10 of the embodiments of the present application comprises an electrolytic cell 110, a hydrogen-side pressure detection device 120, an oxygen-side pressure detection device 130, a pressure-adjustable hydrogen-side pressure equalization device 140, a pressure-adjustable oxygen-side pressure equalization device 150, and a controller 160.

[0041] The electrolytic cell 110 can be provided with a hydrogen side and an oxygen side, and a diaphragm can be provided between the hydrogen side and the oxygen side to prevent mixing of hydrogen and oxygen.

[0042] The diaphragm material of the electrolytic cell 110 should have a certain pressure resistance, that is, when the hydrogen side and the oxygen side of the electrolytic cell 110 have unequal pressure, the diaphragm of the electrolytic cell 110 can maintain structural integrity and functional safety within a certain pressure difference range.

[0043] As shown, Figure 1 The hydrogen-side pressure detection device 120 is used to detect the outlet pressure of the hydrogen side of the electrolytic cell 110.

[0044] The hydrogen-side pressure detection device 120 can use a gas pressure transmitter.

[0045] The gas-liquid mixture of electrolyte and hydrogen gas usually flows out of the hydrogen side outlet of the electrolytic cell 110, and the housing of the hydrogen-side pressure detection device 120 can be designed to be waterproof.

[0046] The hydrogen-side pressure detection device 120 can be installed on the pipeline of the hydrogen side outlet of the electrolytic cell 110 to realize real-time and accurate monitoring of the hydrogen side outlet pressure of the electrolytic cell 110 by the hydrogen-side pressure detection device 120. It can be understood that the hydrogen side outlet pressure of the electrolytic cell 110 can reflect the internal hydrogen side pressure of the electrolytic cell 110.

[0047] As shown, Figure 1 The oxygen-side pressure detection device 130 is used to detect the outlet pressure of the oxygen side of the electrolytic cell 110.

[0048] Similarly, the oxygen-side pressure detection device 130 can use a gas pressure transmitter with a waterproof housing design, and the oxygen-side pressure detection device 130 can be installed on the pipeline of the oxygen side outlet of the electrolytic cell 110.

[0049] As shown, Figure 1 The pressure-adjustable hydrogen-side pressure equalization device 140 is connected to the hydrogen side outlet of the electrolytic cell 110 through a hydrogen-side safety control valve 141.

[0050] The hydrogen-side safety control valve 141 controls the communication between the hydrogen-side pressure equalization device 140 and the hydrogen side outlet of the electrolytic cell 110. When the hydrogen-side safety control valve 141 is opened, the hydrogen side outlet of the electrolytic cell 110 is communicated with the hydrogen-side pressure equalization device 140, and the hydrogen side outlet pressure of the electrolytic cell 110 can be relieved through the hydrogen-side pressure equalization device 140.

[0051] When the hydrogen-side safety control valve 141 is closed, the hydrogen-side outlet of the electrolyzer 110 is not connected to the hydrogen-side equalization device 140, and the hydrogen-side outlet of the electrolyzer 110 does not perform a pressure relief operation.

[0052] The hydrogen-side pressure equalization device 140 has adjustable pressure. The hydrogen-side pressure equalization device 140 can be an equalization tank or other devices. For example, when the hydrogen-side pressure equalization device 140 is an equalization tank, the internal pressure of the equalization tank can be increased by introducing an inert gas into the equalization tank. The inert gas can be nitrogen. That is, the equalization tank can adjust the nitrogen inlet and outlet flow according to specific instructions, thus achieving adjustable pressure.

[0053] In actual operation, when the hydrogen-side safety valve is opened and pressure relief is needed at the hydrogen-side outlet of the electrolyzer 110, the hydrogen-side pressure equalization device 140 can be connected to the hydrogen-side outlet of the electrolyzer 110. At this time, the pressure difference between the hydrogen-side outlet of the electrolyzer 110 and the hydrogen-side pressure equalization device 140 allows a portion of the gas-liquid mixture at the hydrogen-side outlet of the electrolyzer 110 to be discharged into the hydrogen-side pressure equalization device 140 through the hydrogen-side safety control valve 141, thereby regulating the hydrogen-side outlet pressure of the electrolyzer 110. Simultaneously, the pressure of the hydrogen-side pressure equalization device 140 is adjustable, making the adjustment amount of the hydrogen-side outlet pressure of the electrolyzer 110 controllable when connected to the hydrogen-side pressure equalization device 140.

[0054] like Figure 1 As shown, the pressure-adjustable oxygen-side equalization device 150 is connected to the oxygen-side outlet of the electrolytic cell 110 via the oxygen-side safety control valve 151.

[0055] Similarly, in actual operation, by opening the oxygen-side safety valve, when it is necessary to depressurize the oxygen-side outlet of the electrolyzer 110, the oxygen-side equalization device 150 can be connected to the oxygen-side outlet of the electrolyzer 110. At this time, the pressure difference between the oxygen-side outlet of the electrolyzer 110 and the oxygen-side equalization device 150 can cause part of the gas-liquid mixture at the oxygen-side outlet of the electrolyzer 110 to be discharged into the oxygen-side equalization device 150 through the oxygen-side safety control valve 151, thereby achieving the regulation of the oxygen-side outlet pressure of the electrolyzer 110. Simultaneously, the pressure of the oxygen-side equalization device 150 is adjustable, so that when the oxygen-side outlet of the electrolyzer 110 is connected to the oxygen-side equalization device 150, the adjustment amount of the oxygen-side outlet pressure of the electrolyzer 110 is controllable.

[0056] like Figure 1As shown, the controller 160 is electrically connected with the hydrogen-side pressure detection device 120, the oxygen-side pressure detection device 130, the hydrogen-side pressure equalization device 140, the oxygen-side pressure equalization device 150, the hydrogen-side safety control valve 141 and the oxygen-side safety control valve 151, and the controller 160 is configured to adjust the pressure of the oxygen-side pressure equalization device 150 based on the hydrogen-side outlet pressure, adjust the pressure of the hydrogen-side pressure equalization device 140 based on the oxygen-side outlet pressure, and control the opening and closing states of the hydrogen-side safety control valve 141 and the oxygen-side safety control valve 151 based on the pressure difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure.

[0057] That is, the controller 160 controls the hydrogen-side pressure detection device 120, the oxygen-side pressure detection device 130, the hydrogen-side pressure equalization device 140, the oxygen-side pressure equalization device 150, the hydrogen-side safety control valve 141 and the oxygen-side safety control valve 151 through electrical connection, so that the receiving of the pressure signal, the sending of the pressure adjustment instruction or the sending of the switch valve instruction can be realized.

[0058] The controller 160 is configured to adjust the pressure of the oxygen-side pressure equalization device 150 based on the hydrogen-side outlet pressure. That is, under the control of the controller 160, the pressure of the oxygen-side pressure equalization device 150 is adjusted in real time, so that the pressure of the oxygen-side pressure equalization device 150 always keeps close to the hydrogen-side outlet pressure of the electrolytic cell 110 detected by the hydrogen-side pressure detection device 120.

[0059] In this way, when the oxygen-side pressure equalization device 150 is connected with the oxygen-side outlet of the electrolytic cell 110, the oxygen-side outlet pressure of the electrolytic cell 110 is adjusted through the oxygen-side pressure equalization device 150, so that the oxygen-side outlet pressure of the electrolytic cell 110 is indirectly adjusted based on the hydrogen-side outlet pressure of the electrolytic cell 110.

[0060] The controller 160 is configured to adjust the pressure of the hydrogen-side pressure equalization device 140 based on the oxygen-side outlet pressure. Similarly, the controller 160 adjusts the pressure of the hydrogen-side pressure equalization device 140 in real time, so that the pressure of the hydrogen-side pressure equalization device 140 always keeps close to the oxygen-side outlet pressure of the electrolytic cell 110.

[0061] In this way, when the hydrogen-side pressure equalization device 140 is connected with the hydrogen-side outlet of the electrolytic cell 110, the hydrogen-side outlet pressure of the electrolytic cell 110 is indirectly adjusted based on the oxygen-side outlet pressure of the electrolytic cell 110.

[0062] The controller 160 is configured to control the opening and closing states of the hydrogen side safety control valve 141 and the oxygen side safety control valve 151 based on the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure. In actual implementation, when the hydrogen side outlet pressure of the electrolytic cell 110 is greater than the oxygen side outlet pressure, and the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure reaches a certain value, the controller 160 controls the hydrogen side safety control valve 141 to open, and the hydrogen side outlet of the electrolytic side is communicated with the hydrogen side pressure equalizing device 140 and is relieved. It can be understood that the relief amount of the hydrogen side outlet of the electrolytic cell 110 is adjusted according to the pressure of the hydrogen side pressure equalizing device 140, and the pressure of the hydrogen side pressure equalizing device 140 is adjusted in real time based on the oxygen side outlet pressure of the electrolytic cell 110, that is, the hydrogen side outlet pressure of the electrolytic cell 110 can be indirectly adjusted based on the oxygen side outlet pressure of the electrolytic cell 110.

[0063] In actual implementation, when the oxygen side outlet pressure of the electrolytic cell 110 is greater than the hydrogen side outlet pressure, and the pressure difference between the oxygen side outlet pressure and the hydrogen side outlet pressure reaches a certain value, the controller 160 controls the oxygen side safety control valve 151 to open, and the oxygen side outlet of the electrolytic side is communicated with the oxygen side pressure equalizing device 150 and is relieved. It can be understood that the relief amount of the oxygen side outlet of the electrolytic cell 110 is adjusted according to the pressure of the oxygen side pressure equalizing device 150, and the pressure of the oxygen side pressure equalizing device 150 is adjusted in real time based on the hydrogen side outlet pressure of the electrolytic cell 110, that is, the oxygen side outlet pressure of the electrolytic cell 110 can be indirectly adjusted based on the hydrogen side outlet pressure of the electrolytic cell 110.

[0064] In related technologies, in order to solve the problem that the electrolytic cell can only realize pressure equalization and pressure relief control when it is communicated with the gas-liquid separation device, some ways of directly adjusting the pressure of both sides by respectively arranging pressure equalizing devices on the outlets of both sides of the electrolytic cell are also designed. The inventors have found through research that the pressure equalizing device arranged on one side of the electrolytic cell in related technologies usually independently adjusts the pressure of the side under the control of the controller, such as directly relieving the pressure of the hydrogen side when the pressure of the hydrogen side is too large. This pressure relief method can cause the diaphragm to deform dramatically or too fast, affecting the service life of the diaphragm.

[0065] The electrolytic equipment 10 provided by the embodiments of the present application adjusts the pressure of the pressure equalizing device on the side to the pressure of the opposite side, so that the pressure difference of the outlet of the side is basically the same as that when there is no pressure relief, and the diaphragm deforms slowly or at a slow speed. For example, when the pressure of the hydrogen side is greater than the pressure of the oxygen side, the diaphragm deforms towards the oxygen side, the pressure of the hydrogen side pressure equalizing device 140 is adjusted to be basically the same as the pressure of the oxygen side detected by the oxygen side pressure detection device 130, and when the pressure of the hydrogen side is relieved, the hydrogen side pressure equalizing device 140 whose internal pressure has reached the pressure of the oxygen side can make the pressure of the hydrogen side decrease gently, and the diaphragm deforms slowly, so that the diaphragm is not easily damaged.

[0066] According to the electrolysis equipment 10 provided by the embodiment of the present application, the pressure of the local pressure equalizing device is controlled by the pressure on the opposite side of the electrolytic cell 110, so that the pressure relief is smooth and safe, and the diaphragm is slowly deformed during the pressure relief process, and the diaphragm is not easily damaged, thereby ensuring the high reliability of the electrolysis equipment 10.

[0067] In some embodiments, as shown in FIG. 1, the controller 160 is configured to control the hydrogen side safety control valve 141 to open when the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure is greater than a first pressure difference value, and to control the oxygen side safety control valve 151 to open when the pressure difference between the oxygen side outlet pressure and the hydrogen side outlet pressure is greater than a second pressure difference value. Figure 1

[0068] The controller 160 is configured to control the hydrogen side safety control valve 141 to open when the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure is greater than a first pressure difference value. That is, in this embodiment, when the pressure difference between the hydrogen side outlet pressure detected by the hydrogen side pressure detection device 120 and the oxygen side outlet pressure detected by the oxygen side pressure detection device 130 is greater than the first pressure difference value, i.e., the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure reaches a degree that may cause a safety risk, the controller 160 issues an instruction to control the hydrogen side safety control valve 141 to open.

[0069] The hydrogen side safety control valve 141 is opened, and the hydrogen side outlet of the electrolysis side is communicated with the hydrogen side pressure equalizing device 140 and is relieved of pressure. It can be understood that the amount of pressure relief of the hydrogen side outlet of the electrolytic cell 110 is adjusted according to the pressure of the hydrogen side pressure equalizing device 140, and the pressure of the hydrogen side pressure equalizing device 140 is determined based on the oxygen side outlet pressure of the electrolytic cell 110, i.e., the hydrogen side outlet pressure of the electrolytic cell 110 can eventually be gradually reduced to a pressure difference close to zero between the hydrogen side outlet pressure and the oxygen side outlet pressure of the electrolytic cell 110.

[0070] It can be understood that the value of the first pressure difference value can be set after comprehensive consideration of factors such as the pressure resistance of the material of the electrolytic cell 110.

[0071] Similarly, the controller 160 is configured to control the oxygen side safety control valve 151 to open when the pressure difference between the oxygen side outlet pressure and the hydrogen side outlet pressure is greater than a second pressure difference value. That is, in this embodiment, when the pressure difference between the oxygen side outlet pressure detected by the oxygen side pressure detection device 130 and the hydrogen side outlet pressure detected by the hydrogen side pressure detection device 120 is greater than the second pressure difference value, i.e., the pressure difference between the oxygen side outlet pressure and the hydrogen side outlet pressure reaches a degree that may cause a safety risk, the controller 160 issues an instruction to control the oxygen side safety control valve 151 to open. ​

[0072] The oxygen side safety control valve 151 is opened, and the oxygen side outlet of the electrolytic cell 110 is communicated with the oxygen side pressure equalizing device 150 and is depressurized. It can be understood that the amount of pressure relief of the oxygen side outlet of the electrolytic cell 110 is adjusted according to the pressure of the oxygen side pressure equalizing device 150, and the pressure of the oxygen side pressure equalizing device 150 is determined based on the hydrogen side outlet pressure of the electrolytic cell 110, that is, the pressure difference between the oxygen side outlet pressure and the hydrogen side outlet pressure of the electrolytic cell 110 can finally be gradually reduced to close to zero.

[0073] It can be understood that the value of the second pressure difference can be set after comprehensive consideration of factors such as the pressure resistance of the material of the electrolytic cell 110, and the value can be equal to the first pressure difference.

[0074] In the manner of this embodiment, a pressure difference adjustment mechanism for the hydrogen side outlet and the oxygen side outlet of the electrolytic cell 110 is provided, which ensures that the pressure difference between the hydrogen side and the oxygen side of the electrolytic cell 110 is maintained within a small range, and the pressure equalization between the hydrogen side and the oxygen side of the electrolytic cell 110 can be achieved.

[0075] In some embodiments, as shown in Figure 1 The controller 160 includes: a first comparator, electrically connected with the hydrogen side pressure detection device 120 and the oxygen side pressure equalizing device 150, for comparing the pressure of the oxygen side pressure equalizing device 150 with the hydrogen side outlet pressure; a first processor, electrically connected with the first comparator, for outputting a first control instruction based on the comparison result, the first control instruction being used for controlling the oxygen side pressure equalizing device 150; a second comparator, electrically connected with the oxygen side pressure detection device 130 and the hydrogen side pressure equalizing device 140, for comparing the pressure of the hydrogen side pressure equalizing device 140 with the oxygen side outlet pressure; a second processor, electrically connected with the second comparator, for outputting a second control instruction based on the comparison result, the second control instruction being used for controlling the hydrogen side pressure equalizing device 140; a first subtractor, electrically connected with the hydrogen side pressure detection device 120 and the oxygen side pressure detection device 130, for determining a first difference value between the hydrogen side outlet pressure and the oxygen side outlet pressure; a third comparator, electrically connected with the first subtractor, for comparing the first difference value with a first pressure difference value; a third processor, electrically connected with the third comparator, for outputting a third control instruction based on the comparison result, the third control instruction being used for controlling the hydrogen side safety control valve 141; a second subtractor, electrically connected with the oxygen side pressure detection device 130 and the hydrogen side pressure detection device 120, for determining a second difference value between the oxygen side outlet pressure and the hydrogen side outlet pressure; a fourth comparator, electrically connected with the second subtractor, for comparing the second difference value with a second pressure difference value; and a fourth processor, electrically connected with the fourth comparator, for outputting a fourth control instruction based on the comparison result, the fourth control instruction being used for controlling the oxygen side safety control valve 151.

[0076] For example, the hydrogen-side pressure detection device 120 measures the hydrogen-side outlet pressure of the electrolyzer 110 as m, and the pressure of the oxygen-side pressure equalization device 150 as b. The pressure signals m and b are transmitted to the first comparator for comparison.

[0077] When b > m is satisfied, the first processor outputs a first control instruction, which controls the oxygen-side pressure equalization device 150 to independently perform pressure relief by adjusting the nitrogen gas intake and exhaust amount or other means until b = m.

[0078] When b = m is satisfied, the oxygen-side pressure equalization device 150 maintains the pressure unchanged.

[0079] When b < m is satisfied, the first processor outputs a first control instruction, which controls the oxygen-side pressure equalization device 150 to independently perform pressure increase by adjusting the nitrogen gas intake and exhaust amount or other means until b = m.

[0080] For example, the oxygen-side pressure detection device 130 measures the oxygen-side outlet pressure of the electrolyzer 110 as n, and the pressure of the hydrogen-side pressure equalization device 140 as a. The pressure signals n and a are transmitted to the second comparator for comparison.

[0081] When a > n is satisfied, the second processor outputs a second control instruction, which controls the hydrogen-side pressure equalization device 140 to independently perform pressure relief by adjusting the nitrogen gas intake and exhaust amount or other means until a = n.

[0082] When a = n is satisfied, the hydrogen-side pressure equalization device 140 maintains the pressure unchanged.

[0083] When a < n is satisfied, the second processor outputs a second control instruction, which controls the hydrogen-side pressure equalization device 140 to independently perform pressure increase by adjusting the nitrogen gas intake and exhaust amount or other means until a = n.

[0084] For example, the hydrogen-side pressure detection device 120 measures the hydrogen-side outlet pressure of the electrolyzer 110 as m, and the oxygen-side pressure detection device 130 measures the oxygen-side outlet pressure of the electrolyzer 110 as n. The pressure signals m and n are transmitted to the first subtractor to determine the first difference h between the hydrogen-side outlet pressure and the oxygen-side outlet pressure. The value of the first pressure difference h is H.

[0085] It can be understood that h = m - n.

[0086] The third comparator is configured to compare the first difference h with the first pressure difference H.

[0087] When h ≤ H is satisfied, the third processor outputs a third control instruction, which controls the hydrogen-side safety control valve 141 to be in a closed state.

[0088] When h > H, i.e. the hydrogen side outlet pressure m of the electrolytic cell 110 is greater than the oxygen side outlet pressure n and the pressure difference is greater than the first pressure difference value, the third processor outputs a third control instruction, which controls the hydrogen side safety control valve 141 to be in an open state.

[0089] That is, the hydrogen side outlet of the electrolytic cell 110 communicates with the hydrogen side pressure equalizing device 140, the hydrogen side outlet pressure m gradually approaches the pressure a of the hydrogen side pressure equalizing device 140, i.e. m = a. The pressure a of the hydrogen side pressure equalizing device 140 in the electrolytic device 10 is adjusted in real time and kept at the same value as the oxygen side outlet pressure n of the electrolytic cell 110. That is, the hydrogen side outlet pressure m of the electrolytic cell 110 in this embodiment approaches the oxygen side outlet pressure n.

[0090] Similarly, the pressure signals n and m are transmitted to the second subtractor to determine the second difference p between the oxygen side outlet pressure and the hydrogen side outlet pressure. The value of the second pressure difference is P.

[0091] It can be understood that p = n - m.

[0092] The fourth comparator is used to compare the second difference p with the second pressure difference P.

[0093] When p ≤ P, the fourth processor outputs a fourth control instruction, which controls the oxygen side safety control valve 151 to be in a closed state;

[0094] When p > P, i.e. the oxygen side outlet pressure n of the electrolytic cell 110 is greater than the hydrogen side outlet pressure m and the pressure difference is greater than the second pressure difference value, the fourth processor outputs a fourth control instruction, which controls the oxygen side safety control valve 151 to be in an open state.

[0095] That is, the oxygen side outlet of the electrolytic cell 110 communicates with the oxygen side pressure equalizing device 150, the oxygen side outlet pressure n gradually approaches the pressure b of the oxygen side pressure equalizing device 150, i.e. n = b. The pressure b of the oxygen side pressure equalizing device 150 in the electrolytic device 10 is adjusted in real time and kept at the same value as the hydrogen side outlet pressure m of the electrolytic cell 110. That is, the oxygen side outlet pressure n of the electrolytic cell 110 in this embodiment approaches the hydrogen side outlet pressure m.

[0096] In some embodiments, as shown in FIG. 1B, the first pressure difference value and the second pressure difference value are both less than the membrane pressure resistance pressure of the electrolytic cell 110. Figure 1

[0097] ​The first pressure difference value and the second pressure difference value are standard values for opening the hydrogen-side safety control valve 141 and the oxygen-side safety control valve 151, respectively. That is, when the pressure difference between the hydrogen side and the oxygen side of the electrolytic cell 110 reaches the first pressure difference value or the pressure difference between the oxygen side and the hydrogen side of the electrolytic cell 110 reaches the second pressure difference value, the gas-liquid mixture on the side with the greater pressure of the hydrogen side and the oxygen side of the electrolytic cell 110 needs to be discharged to the pressure equalization device on the side to release pressure, so as to keep the absolute value of the pressure difference between the hydrogen side and the oxygen side of the electrolytic cell 110 from being too large.

[0098] It can be understood that the diaphragm of the electrolytic cell 110 is a component for separating the hydrogen side and the oxygen side inside the electrolytic cell 110, that is, the absolute value of the pressure difference between the hydrogen side and the oxygen side of the electrolytic cell 110 is mostly applied to the diaphragm of the electrolytic cell 110. In this case, when the absolute value of the pressure difference between the hydrogen side and the oxygen side of the electrolytic cell 110 exceeds the pressure resistance of the diaphragm of the electrolytic cell 110, the diaphragm of the electrolytic cell 110 is at risk of being damaged.

[0099] That is, the first pressure difference value and the second pressure difference value are safety threshold values set according to the diaphragm material of the electrolytic cell 110 and other factors. The first pressure difference value and the second pressure difference value are both set to be less than the pressure resistance of the diaphragm of the electrolytic cell 110, which can ensure that the pressure applied to the diaphragm of the electrolytic cell 110 is increased to a certain value but has not yet reached the pressure resistance of the diaphragm of the electrolytic cell 110. The controller 160 can accordingly control the hydrogen-side safety control valve 141 or the oxygen-side safety control valve 151 to open, and the side with the greater pressure of the electrolytic cell 110 is released to reduce the absolute value of the pressure difference between the hydrogen side and the oxygen side of the electrolytic cell 110, so that the diaphragm of the electrolytic cell 110 is not easily damaged.

[0100] In some embodiments, as shown in FIG. 1B, the controller 160 is electrically connected with the electrolytic cell 110 and is configured to control the electrolytic cell 110 to stop operating when the hydrogen-side outlet pressure is greater than a first alarm pressure, and the first alarm pressure is less than the maximum design pressure of the electrolytic cell 110. Figure 1 That is, when the pressure of the hydrogen-side outlet of the electrolytic cell 110 exceeds the first alarm pressure set in this embodiment, the controller 160 controls the electrolytic cell 110 to stop operating. It is worth noting that the pressure of the hydrogen-side outlet of the electrolytic cell 110 can reflect the pressure of the hydrogen side inside the electrolytic cell 110.

[0101] The value of the first alarm pressure is set to be less than the maximum design pressure of the electrolytic cell 110, which can ensure that the electrolytic cell 110 stops operating before the pressure value of the hydrogen side of the electrolytic cell 110 is increased to a certain value but has not yet reached the maximum design pressure of the electrolytic cell 110, that is, the internal pressure of the electrolytic cell 110 does not continue to increase, so that the electrolytic cell 110 is not easily damaged.

[0102]

[0103] ​The embodiment scheme stops electrolytic cell 110 when the hydrogen side outlet pressure of electrolytic cell 110 reaches a certain value, so that electrolytic cell 110 is less likely to be damaged or even exploded due to excessive pressure on the hydrogen side inside electrolytic cell 110.

[0104] In some embodiments, as shown in FIG. 1, controller 160 is electrically connected with electrolytic cell 110 and is configured to control electrolytic cell 110 to stop working when the hydrogen side outlet pressure is greater than a first alarm pressure, and the first alarm pressure is less than the maximum design pressure of electrolytic cell 110. Figure 1

[0105] That is, when the pressure of the oxygen side outlet of electrolytic cell 110 exceeds the second alarm pressure set in the embodiment scheme, controller 160 will control electrolytic cell 110 to stop working. It is worth noting that the pressure of the oxygen side outlet of electrolytic cell 110 can reflect the pressure on the oxygen side inside electrolytic cell 110.

[0106] The value of the second alarm pressure is set to be less than the maximum design pressure of electrolytic cell 110, which can ensure that electrolytic cell 110 stops working before the pressure value on the oxygen side of electrolytic cell 110 increases to a certain value but has not reached the maximum design pressure of electrolytic cell 110, that is, the pressure inside electrolytic cell 110 will not continue to increase, so that electrolytic cell 110 is less likely to be damaged.

[0107] The embodiment scheme stops electrolytic cell 110 when the oxygen side outlet pressure of electrolytic cell 110 reaches a certain value, so that electrolytic cell 110 is less likely to be damaged or even exploded due to excessive pressure on the oxygen side inside electrolytic cell 110.

[0108] In some embodiments, as shown in FIG. 1, controller 160 is electrically connected with electrolytic cell 110 and is configured to control electrolytic cell 110 to stop working when the hydrogen side outlet pressure is greater than a first alarm pressure, and the first alarm pressure is less than the maximum design pressure of electrolytic cell 110. Figure 1 In the embodiment scheme, when either of the hydrogen side outlet pressure of electrolytic cell 110 reaching the first alarm pressure and the oxygen side outlet pressure of electrolytic cell 110 reaching the second alarm pressure is satisfied, controller 160 controls electrolytic cell 110 to stop working. That is, through the embodiment scheme, it can be ensured that the hydrogen side pressure and the oxygen side pressure of electrolytic cell 110 are controlled within a certain value, so as to avoid damage or even explosion of electrolytic cell 110 due to excessive internal pressure.

[0109] In some embodiments, as shown in FIG. 1, controller 160 is electrically connected with electrolytic cell 110 and is configured to control electrolytic cell 110 to stop working when the hydrogen side outlet pressure is greater than a first alarm pressure, and the first alarm pressure is less than the maximum design pressure of electrolytic cell 110.

[0110] Figure 1 ​​As shown, the controller 160 is electrically connected to the electrolyzer 110 and is configured to control the electrolyzer 110 to shut down when the absolute value of the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure is greater than a third pressure difference value, and the third pressure difference value is less than the maximum design pressure of the electrolyzer 110.

[0111] When the absolute value of the pressure difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure exceeds a third pressure difference value, the electrolyzer 110 will shut down directly under the control of the controller 160. For example, this third pressure difference value could pose a serious threat to the safety of the diaphragm function in the electrolyzer 110. To ensure the safety of the electrolyzer 110, the controller 160 controls the electrolyzer 110 to stop working, thereby terminating the redox reaction inside the electrolyzer 110.

[0112] Of course, after the electrolyzer 110 is shut down, as a subsequent safety measure, the controller 160 can correspondingly control the opening of the hydrogen-side safety control valve 141 or the oxygen-side safety control valve 151, so as to reduce the absolute value of the pressure difference between the hydrogen-side outlet pressure and the oxygen-side outlet pressure by releasing pressure to the pressure equalization device on the side with higher pressure in the electrolyzer 110.

[0113] In some embodiments, such as Figure 1 As shown, the controller 160 is configured to control the hydrogen-side pressure equalization device 140 to stop pressurizing when the pressure of the hydrogen-side pressure equalization device 140 is greater than the third alarm pressure.

[0114] Under normal operating conditions, the pressure of the hydrogen-side equalization device 140 can be regulated by the controller 160 based on the oxygen-side outlet pressure. When the oxygen-side outlet pressure is too high, the pressure of the hydrogen-side equalization device 140 can be switched to another control logic.

[0115] When the pressure of the hydrogen-side equalization device 140 exceeds the third alarm pressure set in this embodiment, the controller 160 controls the pressure of the hydrogen-side equalization device 140 to stop increasing. This facilitates the connection between the hydrogen-side outlet of the electrolyzer 110 and the hydrogen-side equalization device 140. Since the pressure of the hydrogen-side equalization device 140 is always controlled within the safe pressure range of the third alarm pressure and below, the hydrogen-side outlet of the electrolyzer 110 can safely perform a pressure relief operation to reduce the pressure of the hydrogen-side outlet to a suitable level.

[0116] In some embodiments, such as Figure 1 As shown, the controller 160 is configured to control the oxygen-side equalization device 150 to stop pressurizing when the pressure of the oxygen-side equalization device 150 is greater than the fourth alarm pressure.

[0117] Similarly, when the pressure of the oxygen-side pressure equalizing device 150 is greater than the fourth alarm pressure set in this embodiment, the controller 160 controls the pressure of the oxygen-side pressure equalizing device 150 to stop rising, so that when the outlet on the oxygen side of the electrolytic cell 110 is connected to the oxygen-side pressure equalizing device 150, the outlet on the oxygen side of the electrolytic cell 110 can be safely depressurized to a suitable level because the pressure of the oxygen-side pressure equalizing device 150 is always controlled within the safe pressure range of the fourth alarm pressure and below.

[0118] In some embodiments, as shown in FIG. 1, the controller 160 is configured to control the hydrogen-side pressure equalizing device 140 to stop increasing the pressure when the pressure of the hydrogen-side pressure equalizing device 140 is greater than the third alarm pressure. Figure 1 In some embodiments, as shown in FIG. 1, the controller 160 is configured to control the hydrogen-side pressure equalizing device 140 to stop increasing the pressure when the pressure of the hydrogen-side pressure equalizing device 140 is greater than the third alarm pressure.

[0119] That is, in this embodiment, the hydrogen-side pressure equalizing device 140 and the oxygen-side pressure equalizing device 150 each have an alarm pressure, i.e., the pressure of each of the hydrogen-side pressure equalizing device 140 and the oxygen-side pressure equalizing device 150 stops increasing when reaching a certain value. This scheme can ensure that when the outlet on one side of the electrolytic cell 110 is connected to the pressure equalizing device corresponding to the side, the outlet on the side of the electrolytic cell 110 can be safely depressurized to a suitable safe level.

[0120] In some embodiments, as shown in FIG. 1, the controller 160 is configured to control the hydrogen-side pressure equalizing device 140 to stop increasing the pressure when the pressure of the hydrogen-side pressure equalizing device 140 is greater than the third alarm pressure. Figure 1 In some embodiments, as shown in FIG. 1, the hydrogen-side pressure equalizing device 140 includes a hydrogen-side pressure equalizing tank 142, an inlet of the hydrogen-side pressure equalizing tank 142 being connected to a gas source through a hydrogen-side inlet control valve 143, the gas source being configured to provide nitrogen or inert gas, an outlet of the hydrogen-side pressure equalizing tank 142 being connected to the outlet on the hydrogen side of the electrolytic cell 110 through a hydrogen-side safety control valve 141, and a vent of the hydrogen-side pressure equalizing tank 142 being connected to the outside through a hydrogen-side exhaust control valve 144; a hydrogen-side pressure equalizing tank pressure detection device 1421 is configured to detect the pressure of the hydrogen-side pressure equalizing tank 142; and the controller 160 is electrically connected to the hydrogen-side inlet control valve 143, the hydrogen-side exhaust control valve 144, and the hydrogen-side pressure equalizing tank pressure detection device 1421.

[0121] That is, in this embodiment, the hydrogen-side pressure equalizing device 140 is the hydrogen-side pressure equalizing tank 142. The hydrogen-side pressure equalizing tank 142 can control the gas inlet amount of the gas source by adjusting the hydrogen-side inlet control valve 143 and control the gas exhaust amount of the gas source by adjusting the hydrogen-side exhaust control valve 144, so as to realize the real-time adjustment of the pressure of the hydrogen-side pressure equalizing tank 142 detected by the hydrogen-side pressure equalizing tank pressure detection device 1421 based on the pressure of the outlet on the oxygen side by the controller 160.

[0122] In some embodiments, as shown in FIG. 1, the controller 160 is configured to control the hydrogen-side pressure equalizing device 140 to stop increasing the pressure when the pressure of the hydrogen-side pressure equalizing device 140 is greater than the third alarm pressure. Figure 1As shown, the oxygen-side pressure equalizing device 150 includes an oxygen-side pressure equalizing tank 152, an inlet of the oxygen-side pressure equalizing tank 152 being connected to a gas source through an oxygen-side inlet gas control valve 153, the gas source being configured to provide nitrogen or inert gas, an outlet of the oxygen-side pressure equalizing tank 152 being connected to an oxygen-side outlet of the electrolytic cell 110 through an oxygen-side safety control valve 151, a vent of the oxygen-side pressure equalizing tank 152 being connected to the outside through an oxygen-side exhaust control valve 154, and an oxygen-side pressure equalizing tank pressure detection device 1521 being configured to detect a pressure of the oxygen-side pressure equalizing tank 152; wherein the controller 160 is electrically connected to the oxygen-side inlet gas control valve 153, the oxygen-side exhaust control valve 154, and the oxygen-side pressure equalizing tank pressure detection device 1521.

[0123] That is, in this embodiment, the oxygen-side pressure equalizing device 150 is the oxygen-side pressure equalizing tank 152. The oxygen-side pressure equalizing tank 152 can be adjusted by the controller 160 to control the gas source inlet gas amount through the oxygen-side inlet gas control valve 153 and to control the gas source exhaust amount through the oxygen-side exhaust control valve 154, so as to realize the controller 160 to adjust the pressure of the oxygen-side pressure equalizing tank 152 detected by the oxygen-side pressure equalizing tank pressure detection device 1521 in real time based on the hydrogen-side outlet pressure.

[0124] In some embodiments, as shown, Figure 1 As shown, the hydrogen-side pressure equalizing device 140 includes a hydrogen-side pressure equalizing tank 142, an inlet of the hydrogen-side pressure equalizing tank 142 being connected to a gas source through a hydrogen-side inlet gas control valve 143, the gas source being configured to provide nitrogen or inert gas, an outlet of the hydrogen-side pressure equalizing tank 142 being connected to a hydrogen-side outlet of the electrolytic cell 110 through a hydrogen-side safety control valve 141, a vent of the hydrogen-side pressure equalizing tank 142 being connected to the outside through a hydrogen-side exhaust control valve 144, and a hydrogen-side pressure equalizing tank pressure detection device 1421 being configured to detect a pressure of the hydrogen-side pressure equalizing tank 142; wherein the controller 160 is electrically connected to the hydrogen-side inlet gas control valve 143, the hydrogen-side exhaust control valve 144, and the hydrogen-side pressure equalizing tank pressure detection device 1421. Meanwhile, the oxygen-side pressure equalizing device 150 includes an oxygen-side pressure equalizing tank 152, an inlet of the oxygen-side pressure equalizing tank 152 being connected to a gas source through an oxygen-side inlet gas control valve 153, the gas source being configured to provide nitrogen or inert gas, an outlet of the oxygen-side pressure equalizing tank 152 being connected to an oxygen-side outlet of the electrolytic cell 110 through an oxygen-side safety control valve 151, a vent of the oxygen-side pressure equalizing tank 152 being connected to the outside through an oxygen-side exhaust control valve 154, and an oxygen-side pressure equalizing tank pressure detection device 1521 being configured to detect a pressure of the oxygen-side pressure equalizing tank 152; wherein the controller 160 is electrically connected to the oxygen-side inlet gas control valve 153, the oxygen-side exhaust control valve 154, and the oxygen-side pressure equalizing tank pressure detection device 1521.

[0125] That is, in this embodiment, the hydrogen-side pressure equalizing device 140 and the oxygen-side pressure equalizing device 150 both use pressure equalizing tanks.

[0126] The hydrogen side equalizing tank 142 can control the gas source inlet amount by adjusting the hydrogen side inlet control valve 143 and control the gas source outlet amount by adjusting the hydrogen side outlet control valve 144, so that the controller 160 can adjust the hydrogen side equalizing tank pressure detected by the hydrogen side equalizing tank pressure detection device 1421 in real time based on the oxygen side outlet pressure.

[0127] The oxygen side equalizing tank 152 can control the gas source inlet amount by adjusting the oxygen side inlet control valve 153 and control the gas source outlet amount by adjusting the oxygen side outlet control valve 154, so that the controller 160 can adjust the oxygen side equalizing tank pressure detected by the oxygen side equalizing tank pressure detection device 1521 in real time based on the hydrogen side outlet pressure.

[0128] By using the equalizing tank as the equalizing device and adjusting the equalizing tank pressure in real time based on the pressure at the outlet of the electrolytic tank 110 on the opposite side, the pressure on the hydrogen side and the oxygen side of the electrolytic tank 110 can tend to be equal after the safety control valve on one side of the electrolytic tank 110 is opened for pressure relief.

[0129] At the same time, compared with the method of directly adjusting the outlet pressure of the electrolytic tank 110 by using the equalizing valve, the use of the equalizing tank in this scheme can avoid the sudden fluctuation of the outlet pressure of the electrolytic tank 110 after the pressure relief valve is opened. The stability of the electrolytic device 10 in this scheme is high.

[0130] The application also provides a hydrogen production system 1.

[0131] As shown in the hydrogen production system 1 includes an electrolytic device 10. ​

[0132] According to the hydrogen production system 1 provided by the application, the pressure of the equalizing device on the side is controlled by the pressure on the opposite side of the electrolytic tank 110, so that the pressure relief is smooth when the side is relieved, the safety is high, and the diaphragm is slowly deformed during the pressure relief process, so that the diaphragm is not easily damaged, and the high reliability of the hydrogen production system 1 is ensured.

[0133] The application also provides a hydrogen production station.

[0134] The hydrogen production station includes a hydrogen production system 1 and a new energy power generation device.

[0135] The new energy power generation device can be a wind power generation device, a solar power generation device, or other devices.

[0136] According to the hydrogen production station provided by the application, the new energy power generation device supplies power to the hydrogen production system 1, so that the electrolytic device 10 in the hydrogen production system 1 can use electrical energy to perform the water electrolysis hydrogen production reaction. This way makes the hydrogen production station can fully utilize new energy power to produce hydrogen, thereby reducing the dependence on traditional fossil energy and helping to reduce carbon emissions. ​

[0137] The terms "first", "second", and the like in the description and in the claims of this application are used for distinguishing between similar objects and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the terms so construed herein is merely for convenience and only to aid in understanding the application and is in no way a limitation on its broader scope. A description of the above terms is not meant to limit the number of objects that can be distinguished by these terms. For example, the first object can be one or more. Further, the terms "and / or" in the description and in the claims of this application are used to associate together alternative-listed items, that is, items that are conjunctively present in at least one of the groups.

[0138] In the description of the application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to indicate the orientation or position of the described or claimed item on the drawings as shown in the drawings, and are not meant to limit the application to the particular orientation, configuration, or operation described or suggested in the drawings. Thus, the application is not limited to the specific orientation or configuration of the items shown in the drawings.

[0139] In the description of the application, "first feature" and "second feature" can include one or more of the features.

[0140] In the description of the application, "a plurality of" means two or more.

[0141] In the description of the application, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0142] In the description of the application, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0143] In the description of the application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0144] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrolysis apparatus, characterized by, The electrolytic cell comprises: a hydrogen side pressure detection device for detecting the hydrogen side outlet pressure of the electrolytic cell; an oxygen side pressure detection device for detecting the oxygen side outlet pressure of the electrolytic cell; a pressure-adjustable hydrogen side pressure equalization device connected to the hydrogen side outlet of the electrolytic cell through a hydrogen side safety control valve; a pressure-adjustable oxygen side pressure equalization device connected to the oxygen side outlet of the electrolytic cell through an oxygen side safety control valve; a controller electrically connected to the hydrogen side pressure detection device, the oxygen side pressure detection device, the hydrogen side pressure equalization device, the oxygen side pressure equalization device, the hydrogen side safety control valve and the oxygen side safety control valve, configured to adjust the pressure of the oxygen side pressure equalization device based on the hydrogen side outlet pressure, adjust the pressure of the hydrogen side pressure equalization device based on the oxygen side outlet pressure, and control the opening and closing states of the hydrogen side safety control valve and the oxygen side safety control valve based on the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure.

2. The electrolytic device according to claim 1, wherein the controller is configured to control the hydrogen side safety control valve to open when the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure is greater than a first pressure difference value, and control the oxygen side safety control valve to open when the pressure difference between the oxygen side outlet pressure and the hydrogen side outlet pressure is greater than a second pressure difference value. the controller comprises:

3. The electrolytic apparatus of claim 2, wherein a first comparator electrically connected to the hydrogen side pressure detection device and the oxygen side pressure equalization device, configured to compare the pressure of the oxygen side pressure equalization device with the hydrogen side outlet pressure; a first processor electrically connected to the first comparator, configured to output a first control instruction based on the comparison result, the first control instruction being used to control the oxygen side pressure equalization device; a second comparator electrically connected to the oxygen side pressure detection device and the hydrogen side pressure equalization device, configured to compare the pressure of the hydrogen side pressure equalization device with the oxygen side outlet pressure; a second processor electrically connected to the second comparator, configured to output a second control instruction based on the comparison result, the second control instruction being used to control the hydrogen side pressure equalization device; a first subtractor electrically connected to the hydrogen side pressure detection device and the oxygen side pressure detection device, configured to determine a first difference value between the hydrogen side outlet pressure and the oxygen side outlet pressure; a third comparator electrically connected to the first subtractor, configured to compare the first difference value with the first pressure difference value; a third processor electrically connected to the third comparator, configured to output a third control instruction based on the comparison result, the third control instruction being used to control the hydrogen side safety control valve; a second subtractor electrically connected to the oxygen side pressure detection device and the hydrogen side pressure detection device, configured to determine a second difference value between the oxygen side outlet pressure and the hydrogen side outlet pressure; a fourth comparator electrically connected to the second subtractor, configured to compare the second difference value with the second pressure difference value; a fourth processor electrically connected to the fourth comparator, configured to output a fourth control instruction based on the comparison result, the fourth control instruction being used to control the oxygen side safety control valve.

4. The electrolytic device according to claim 2, wherein ​ The first pressure difference value and the second pressure difference value are both less than the diaphragm pressure resistance pressure of the electrolytic cell.

5. The electrolysis device according to any one of claims 1-4, wherein the controller is electrically connected to the electrolytic cell and configured to control the electrolytic cell to shut down when the hydrogen side outlet pressure is greater than a first alarm pressure, and the first alarm pressure is less than the maximum design pressure of the electrolytic cell. And / or, the controller is electrically connected to the electrolytic cell and configured to control the electrolytic cell to shut down when the oxygen side outlet pressure is greater than a second alarm pressure, and the second alarm pressure is less than the maximum design pressure of the electrolytic cell.

6. The electrolysis device according to any one of claims 1-4, wherein the controller is electrically connected to the electrolytic cell and configured to control the electrolytic cell to shut down when the absolute value of the pressure difference between the hydrogen side outlet pressure and the oxygen side outlet pressure is greater than a third pressure difference value, and the third pressure difference value is less than the maximum design pressure of the electrolytic cell.

7. The electrolysis device according to any one of claims 1-4, wherein the controller is configured to control the hydrogen side pressure equalizing device to stop pressure increasing when the pressure of the hydrogen side pressure equalizing device is greater than a third alarm pressure. And / or, the controller is configured to control the oxygen side pressure equalizing device to stop pressure increasing when the pressure of the oxygen side pressure equalizing device is greater than a fourth alarm pressure.

8. The electrolysis device according to any one of claims 1-4, wherein the hydrogen side pressure equalizing device comprises: a hydrogen side pressure equalizing tank, an inlet of the hydrogen side pressure equalizing tank being connected to a gas source through a hydrogen side inlet control valve, the gas source being used to provide nitrogen or inert gas, an outlet of the hydrogen side pressure equalizing tank being connected to the hydrogen side outlet of the electrolytic cell through the hydrogen side safety control valve, and a vent of the hydrogen side pressure equalizing tank being connected to the outside through a hydrogen side exhaust control valve; a hydrogen side pressure equalizing tank pressure detection device for detecting the pressure of the hydrogen side pressure equalizing tank; wherein the controller is electrically connected to the hydrogen side inlet control valve, the hydrogen side exhaust control valve, and the hydrogen side pressure equalizing tank pressure detection device. And / or, the oxygen side pressure equalizing device comprises: an oxygen side pressure equalizing tank, an inlet of the oxygen side pressure equalizing tank being connected to a gas source through an oxygen side inlet control valve, the gas source being used to provide nitrogen or inert gas, an outlet of the oxygen side pressure equalizing tank being connected to the oxygen side outlet of the electrolytic cell through the oxygen side safety control valve, and a vent of the oxygen side pressure equalizing tank being connected to the outside through an oxygen side exhaust control valve; an oxygen side pressure equalizing tank pressure detection device for detecting the pressure of the oxygen side pressure equalizing tank; wherein the controller is electrically connected to the oxygen side inlet control valve, the oxygen side exhaust control valve, and the oxygen side pressure equalizing tank pressure detection device. comprising: the electrolysis device according to any one of claims 1-8. comprising: the hydrogen production system according to claim 9; 9. A hydrogen production system, characterized by, a new energy power generation device, the new energy power generation device being used to supply power to the hydrogen production system. ​ 10. A hydrogen production station, characterized in that, ​ ​ ​

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