Winding electrode body and electrolysis device with same

Abstract

The invention discloses a winding electrode body and an electrolysis device with the winding electrode body, and relates to the technical field of hydrogen production through water electrolysis. The wound electrode body is formed by winding a strip-shaped laminated body into a spiral shape. The laminated body comprises an insulating film, and a hydrogen production electrode and a buffer electrode which are arranged on two sides of the insulating film; the wound electrode body is arranged in the electrolytic cell. The winding electrode body formed by winding the laminated body into the vortex shape is arranged in the electrolytic cell, meanwhile, the laminated body comprises the insulating film, the hydrogen production electrode and the buffer electrode, the hydrogen production electrode and the buffer electrode are arranged on the two sides, then hydrogen production is carried out when the winding electrode body is powered on, and then the hot electrolyte is introduced into the electrolytic cell for oxygen production; separation of oxygen production and hydrogen production in time is realized on the whole; the electrode body is wound into a vortex shape by a laminated body, the hydrogen production area is effectively increased, a traditional filter pressing type electrode groove structure is changed, a novel electrode water hydrogen production device structure is creatively designed, the structure is simple, renewable energy sources can be matched, and membrane-free high-voltage water electrolysis hydrogen production is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production by electrolysis of water, and in particular relates to a wound electrode body and an electrolysis device having the same. Background Art

[0002] Hydrogen energy is recognized as a clean energy source, which has the advantages of light density, good thermal conductivity, and good combustion performance. For renewable energy, hydrogen energy is considered to be an important bridge connecting fossil energy to renewable energy, and an important carrier for achieving sustainable energy supply and circulation. At present, the commonly used industrial hydrogen production methods mainly include natural gas steam reforming hydrogen production, methanol steam conversion hydrogen production, water electrolysis hydrogen production, and hydrocarbon oxidation reforming hydrogen production. From the perspective of environmental protection and energy loss, none of them meets the requirements of sustainable development. In the long run, only "green hydrogen" prepared by renewable energy electrolysis water can truly achieve zero carbon emissions.

[0003] The operation of preparing hydrogen by electrolysis of water is relatively simple, the technology is relatively mature, and the hydrogen production process is pollution-free, which is an important means to achieve large-scale production of hydrogen. In the current industrial production of hydrogen, the cathode and anode simultaneously generate hydrogen and oxygen in the electrode process, and the hydrogen evolution reaction and the oxygen evolution reaction are coupled. Whether it is alkaline water hydrogen production, PEM hydrogen production or solid oxide hydrogen production, it is necessary to use expensive diaphragms to separate hydrogen and oxygen to ensure the purity of the generated gas and the safety of production; however, renewable energy such as solar energy and wind energy are intermittent and volatile, and there are huge challenges in the direct and efficient use of renewable energy by electrolysis of water technology; when operating at low load, the oxygen generation rate is too low, even lower than the rate at which oxygen permeates through the diaphragm to the anode side, so it is difficult to directly use discontinuous and intermittent wind / solar power generation as an energy source for hydrogen production. The membrane permeation rate of hydrogen and oxygen gas will also increase under high pressure, resulting in reduced gas purity. Due to this limitation, the actual alkaline solution electrolysis pressure does not exceed 3.2MPa, and the allowable pressure of the proton exchange membrane PEM is slightly higher. The potential advantages of high-pressure electrolysis cannot be brought into play. At the same time, high-pressure gas is the main cause of membrane structure and performance degradation, which further affects gas purity and increases energy consumption. Summary of the invention

[0004] The object of the present invention is to provide a wound electrode body and an electrolysis device having the same, which solves the problems raised by the background technology by arranging a wound electrode body wound into a spiral shape by a stack in an electrolytic cell, and the stack includes an insulating film, and a hydrogen-producing electrode and a cache electrode arranged on both sides.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a wound electrode body, which is a strip-shaped laminate wound into a spiral shape; the laminate includes an insulating film, and a hydrogen-producing electrode and a cache electrode arranged on both sides of the insulating film; the cache electrode includes nickel hydroxide doped with cobalt; the hydrogen-producing electrode is selected from precious metal materials and transition metal compounds; the precious metal materials include platinum, platinum black, and a composite material of platinum black and carbon materials; the transition metal compounds include phosphides, nitrides, oxides, carbides and phospho-nitrides of metal nickel, molybdenum and tungsten; the insulating film prevents short circuit between positive and negative electrodes and allows electrolyte ions to pass through, and the material includes porous filter membranes such as glass fiber diaphragms.

[0007] Furthermore, the insulating film, hydrogen-producing electrode and cache electrode are all in a strip-shaped structure, and one side of the hydrogen-producing electrode is respectively connected to a plurality of pole ears A, and one side of the cache electrode is respectively connected to a plurality of pole ears B; a plurality of the pole ears A are respectively connected to the conductive sheet A; a plurality of the pole ears B are respectively connected to the conductive sheet B.

[0008] Furthermore, the distance between two adjacent pole tabs A gradually increases along their length direction; the distance between two adjacent pole tabs B gradually increases along their length direction.

[0009] An electrolytic device comprises an electrolytic cell, in which a wound electrode body is arranged; a liquid inlet and a liquid outlet are connected at the top and bottom of the electrolytic cell;

[0010] The electrolysis device comprises the following steps when performing electrolysis:

[0011] Step 1, introducing electrolyte into the electrolytic cell, and controlling the hydrogen production electrode and the buffer electrode to be powered respectively;

[0012] Step 2, continuously introducing electrolyte into the electrolytic cell for replacement and emptying;

[0013] Step 3: introducing hot electrolyte into the electrolytic cell.

[0014] Step 4, continuously introducing electrolyte into the electrolytic cell for replacement and emptying;

[0015] Furthermore, the electrolytic cell is a closed structure, with a first liquid inlet pipe, a second liquid inlet pipe and a third liquid inlet pipe arranged at the bottom, and a first liquid outlet pipe, a second liquid outlet pipe and a third liquid outlet pipe arranged at the top; valves are arranged on the first liquid inlet pipe, the second liquid inlet pipe and the third liquid inlet pipe;

[0016] It also includes a hydrogen gas-liquid separation tank, an oxygen gas-liquid separation tank and a flushing tank; the bottoms of the hydrogen gas-liquid separation tank, the oxygen gas-liquid separation tank and the flushing tank are all connected to the water inlet end of a circulation pump, and the circulation pump is respectively connected to the first liquid inlet pipe, the second liquid inlet pipe and the third liquid inlet pipe; the pipelines connecting the circulation pump with the hydrogen gas-liquid separation tank, the oxygen gas-liquid separation tank and the flushing tank are respectively provided with a shut-off valve A, a shut-off valve B and a shut-off valve C; the tops of the hydrogen gas-liquid separation tank, the oxygen gas-liquid separation tank and the flushing tank are respectively connected to the first liquid outlet pipe, the second liquid outlet pipe and the third liquid outlet pipe; the hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank are respectively connected to the hydrogen gas storage tank and the oxygen gas storage tank; the oxygen gas-liquid separation tank stores hot electrolyte, and the flushing tank stores electrolyte.

[0017] Furthermore, the tops of the hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank are both connected with water supply pipes, and water supply valves are provided on the water supply pipes. A stirring mechanism and a liquid level sensor are both provided in the hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank.

[0018] Furthermore, it also includes a controller, which connects the valve, a switch arranged on the power supply circuit, a circulation pump, a water supply valve, a stirring mechanism, a liquid level sensor, a shut-off valve A, a shut-off valve B and a shut-off valve C.

[0019] Furthermore, a gas flow sensor connected to the controller is respectively provided at the first liquid outlet pipe and the second liquid outlet pipe.

[0020] The present invention has the following beneficial effects:

[0021] The present invention arranges a wound electrode body formed by winding a stack into a spiral shape in an electrolytic cell, and the stack includes an insulating film, and a hydrogen-producing electrode and a buffer electrode arranged on both sides. When the wound electrode body is energized, hydrogen is produced, and then hot electrolyte is introduced into the electrolytic cell to produce oxygen, thereby realizing the temporal separation of oxygen production and hydrogen production as a whole; and the device can withstand high pressure.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the wound electrode body of the present invention;

[0025] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0026] Figure 3 Schematic diagram of the electrolysis system structure of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] Embodiment 1, as Figure 1-2 As shown, the present invention provides a wound electrode body, which is a strip-shaped laminated body wound into a spiral structure, and the laminated body includes an insulating film 10 located in the middle, and a hydrogen-producing electrode 11 and a cache electrode 12 respectively arranged on both sides of the insulating film 10, and the cache electrode 12 is nickel hydroxide doped with cobalt; the hydrogen-producing electrode 11 is selected from precious metal materials and transition metal compounds; the precious metal materials include platinum, platinum black, and a composite material of platinum black and carbon materials; the transition metal compounds include phosphides, nitrides, oxides, carbides and phospho-nitrides of metal nickel, molybdenum and tungsten; the insulating film prevents short circuit between positive and negative electrodes and allows electrolyte ions to pass through, and the material includes porous filter membranes such as glass fiber diaphragms.

[0030] In order to facilitate the electrical connection of the wound electrode body during use, the insulating film 10, the hydrogen-producing electrode 11 and the cache electrode 12 provided by the present invention are all in a strip-shaped structure, and one side of the hydrogen-producing electrode 11 is respectively connected to a plurality of pole ears A111, and one side of the cache electrode 12 is respectively connected to a plurality of pole ears B121; the plurality of pole ears A111 are respectively connected to the conductive sheet A110; and the plurality of pole ears B121 are respectively connected to the conductive sheet B120.

[0031] Based on the above, in order to facilitate the connection of the pole tabs A111 and B121 to a rectangular plate-shaped conductive sheet A110 and a conductive sheet B120 respectively after the winding of the wound electrode body, after the winding, the pole tabs A111 and B121 are respectively located on both sides of the central axis of the wound electrode body, and the connection line of several pole tabs A111 is kept in a straight line, and the connection line of several pole tabs B121 is kept in a straight line; that is, it is required that during processing, the distance between two adjacent pole tabs A111 is gradually increased along the length direction; the distance between two adjacent pole tabs B121 is gradually increased along the length direction.

[0032] Embodiment 2, as Figure 3 The present invention provides an electrolysis device, which includes an electrolysis cell 1, and the wound electrode body provided in the above embodiment 1 is arranged in the electrolysis cell 1.

[0033] Based on the above electrolysis device, the actual electrolysis includes the following steps:

[0034] Step 1: Electrolyte is introduced into the electrolytic cell 1, and the hydrogen-producing electrode 11 and the buffer electrode 12 are respectively powered. At this time, hydrogen is produced at the hydrogen-producing electrode 11. During the hydrogen production stage, the temperature of the electrolyte in the electrolytic cell 1 is controlled by the temperature control system to be at room temperature -60°C, and the nickel hydroxide in the buffer electrode 12 is oxidized to nickel oxyhydroxide, and the reaction occurs: Ni(OH) 2 +OH - →NiOOH+H 2 O+e - ;

[0035] Step 2: Control the hydrogen-producing electrode 11 and the buffer electrode 12 to be disconnected from the power supply respectively, and continuously introduce electrolyte into the electrolytic cell 1 for replacement and emptying;

[0036] Step 3: A hot electrolyte at a temperature of 95°C or above is introduced into the electrolytic cell 1. The nickel oxyhydroxide undergoes a thermal decomposition reaction, where the nickel oxyhydroxide is reduced to nickel hydroxide and oxygen is released, resulting in the reaction: 4NiOOH+2H 2 O→4Ni(OH) 2 +O 2 ;

[0037] Step 4: Continue to introduce electrolyte into the electrolytic cell to displace and drain it.

[0038] Furthermore, the above-mentioned distributed hydrogen and oxygen production is achieved during electrolysis, thereby avoiding the mixing of oxygen and hydrogen; the electrolytic cell 1 provided by the present invention is a closed structure, and the three liquid inlets at the bottom are respectively connected to the first liquid inlet pipe 131, the second liquid inlet pipe 132 and the third liquid inlet pipe 133, and the three liquid outlets at the top are respectively connected to the first liquid outlet pipe 141, the second liquid outlet pipe 142 and the third liquid outlet pipe 143; valves are provided on the first liquid inlet pipe 131, the second liquid inlet pipe 132 and the third liquid inlet pipe 133, and for the convenience of power connection, two power connection posts 16 are provided on the top of the electrolytic cell 1, the two power connection posts 16 located inside the electrolytic cell 1 are respectively electrically connected to the conductive sheet A110 and the conductive sheet B120, and the two power connection posts 16 located outside the electrolytic cell 1 are respectively electrically connected to the positive and negative poles of the power supply.

[0039] At the same time, in order to facilitate the collection of hydrogen and oxygen, a hydrogen gas-liquid separation tank 13a, an oxygen gas-liquid separation tank 14a and a flushing tank 15a are also included; the bottoms of the hydrogen gas-liquid separation tank 13a, the oxygen gas-liquid separation tank 14a and the flushing tank 15a are all connected to the water inlet end of a circulation pump 16a, and the circulation pump 16a is respectively connected to the first liquid inlet pipe 131, the second liquid inlet pipe 132 and the third liquid inlet pipe 133; the pipelines connecting the circulation pump 16a with the hydrogen gas-liquid separation tank 13a, the oxygen gas-liquid separation tank 14a and the flushing tank 15a are respectively provided with a shut-off valve A13b and a shut-off valve B14b and shut-off valve C15b; the tops of the hydrogen gas-liquid separation tank 13a, the oxygen gas-liquid separation tank 14a and the flushing tank 15a are respectively connected to the first liquid outlet pipe 141, the second liquid outlet pipe 142 and the third liquid outlet pipe 143; the hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank are respectively connected to the hydrogen gas storage tank and the oxygen gas storage tank; the oxygen gas-liquid separation tank 14a stores hot electrolyte, and the flushing tank 15a stores electrolyte; the hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank are respectively connected to the hydrogen gas storage tank and the oxygen gas storage tank; and then when in use, the hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank are used to process and collect hydrogen and oxygen respectively.

[0040] In the above-mentioned steps 2 and 4, the electrolyte stored in the rinsing tank 15a is introduced into the electrolytic tank for replacement and emptying, that is, the electrolyte at room temperature is stored in the rinsing tank 15a.

[0041] It should be noted that, during long-term use, the water in the electrolyte will be decomposed into oxygen and hydrogen, which will easily lead to an increase in the concentration of the electrolyte as the work progresses. Based on this, the present invention is connected to the top of the hydrogen gas-liquid separation tank 13a and the oxygen gas-liquid separation tank 14a with a water supply pipe, and a water supply valve is set on the water supply pipe, and the hydrogen gas-liquid separation tank 13a and the oxygen gas-liquid separation tank 14a are both provided with a stirring mechanism and a liquid level sensor; the liquid level height in the electrolyte storage tank is controlled to be H in the initial state, then when the above step 2 After completion, all the electrolyte in the electrolytic cell 1 is controlled to flow back to the hydrogen gas-liquid separation tank 13a and the oxygen gas-liquid separation tank 14a, and then water is added to the hydrogen gas-liquid separation tank 13a and the oxygen gas-liquid separation tank 14a through the water supply pipe until the liquid level reaches H, so that the concentration of the electrolyte can be conveniently controlled during use; at the same time, the stirring mechanism is set to facilitate stirring to ensure that the concentration at each position is the same after water replenishment, and the liquid level sensor is set to facilitate the injection of an appropriate amount of electrolyte into the electrolytic cell 1 according to needs during use.

[0042] Based on the above, in order to realize automated production during the production process, it is necessary to detect the progress of oxygen production and hydrogen production. Based on this, gas flow sensors connected to the controller are respectively set at the first liquid outlet pipe 141 and the second liquid outlet pipe 142, and the gas flow sensors are used to detect whether there is gas flowing, and then determine the progress of oxygen production and hydrogen production. Combined with the setting of the gas flow sensor, the above two gas flow sensors are also connected to a controller, the controller connects the valve, the switch set on the power supply circuit, the first circulation pump 16a, the water supply valve, the stirring mechanism, the liquid level sensor, the shut-off valve A13b, the shut-off valve B14b and the shut-off valve C15b.

[0043] It is known that the main technologies for producing hydrogen through water electrolysis include alkaline (ALK), anion exchange membrane (AEM), proton exchange membrane (PEM) and solid oxide (SOEC). PEM water electrolysis technology has the advantages of high energy efficiency and operational flexibility. However, expensive precious metal catalysts are required, and the high cost limits the widespread application of PEM technology. The AEM electrolyzer combines the affordability of ALK with the efficiency of PEM, allowing the use of non-precious metal catalysts and operating at different pressures. However, the AEM membrane is currently facing challenges in chemical and mechanical stability. Solid oxide electrolysis technology can operate efficiently and reversibly at high temperatures. However, thermochemical cycles, especially when the system is started and stopped, accelerate aging and shorten the service life. The technology is currently in the research and development stage. Alkaline water electrolysis technology has been commercialized, with advantages such as relatively mature processes, cost-effectiveness, large-scale production and long service life, and has a wide range of application scenarios.

[0044] However, in the electrolysis of water, the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are coupled in time and space. Whether it is alkaline solution electrolysis of water, proton / anion exchange membrane electrolysis of water, or solid oxide electrolysis of water, a corresponding diaphragm is required to block the mixing of hydrogen and oxygen to ensure the purity of hydrogen and oxygen. The barrier effect of the diaphragm is weakened in the following two cases. First, when operating at low load, the oxygen generation rate is too low, even lower than the rate at which hydrogen passes through the diaphragm to the cathode side. Therefore, it is highly challenging to directly use intermittent and discontinuous wind or solar energy as an energy source for hydrogen generation. Second, as the system pressure increases, the gas permeability increases and the hydrogen purity decreases. This limits the operating pressure and hinders the full realization of the advantages of high-pressure electrolysis;

[0045] Through the arrangement of the present invention, the separation of oxygen production and hydrogen production in time effectively solves the problem of hydrogen and oxygen permeation through the membrane, ensuring the high purity of the two gases; at the same time, the electrolysis water hydrogen production device does not need to use an expensive diaphragm to block hydrogen and oxygen, saving costs; in addition, it can withstand high pressure. When the internal pressure rises to more than 10MPa, hydrogen begins to have the value of being directly loaded into the hydrogen storage tank, eliminating the expensive hydrogen booster pump and boosting energy consumption, which is a very attractive technology in the industry. The dew point temperature of water vapor under high pressure is high, which reduces the content of water vapor in the gas, which is equivalent to replacing cooling condensation with pressurized condensation, simplifying the drying process. Thereby simplifying the post-processing process (such as purification and compressed storage), and greatly reducing the cost and energy consumption associated with hydrogen production; at the same time, intermittent and discontinuous wind energy or solar energy can be directly used as the energy source for hydrogen generation.

[0046] Through technological innovation, the present invention uses nickel hydroxide as a cache electrode, and prepares it into a wound electrode body together with a hydrogen evolution electrode, and creatively designs a high-pressure hydrogen production device, which distinguishes the water electrolysis decoupled hydrogen production method from the traditional filter press electrolyzer structure; there is no need to consider the sealing problem between the electrolysis chambers, which simplifies the integration process and reduces manufacturing costs. The electrolysis device provided by the present invention is different from the traditional diaphragm electrolysis method when used, and can be directly adapted to the new technology of electrolysis hydrogen production from renewable energy, and can reduce the cost and safety risks of hydrogen production, which is of great significance to large-scale renewable energy electricity-to-hydrogen and field distributed wind and solar hydrogen storage (such as 5G base stations). This method provides a new idea for converting decoupled water electrolysis into industrial applications.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to 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.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wound electrode body, characterized in that: The wound electrode body is a strip-shaped laminate wound into a spiral shape; the laminate comprises an insulating film (10), and a hydrogen-generating electrode (11) and a buffer electrode (12) arranged on both sides of the insulating film (10); The cache electrode (12) comprises nickel hydroxide; The hydrogen-producing electrode (11) is selected from noble metal materials and transition metal compounds; the noble metal materials include platinum, platinum black, and composite materials of platinum black and carbon materials; the transition metal compounds include phosphides, nitrides, oxides, carbides and phospho-nitrides of metal nickel, molybdenum and tungsten.

2. A wound electrode body according to claim 1, characterized in that: The insulating film (10), the hydrogen-generating electrode (11) and the buffer electrode (12) are all in a strip-shaped structure, and one side of the hydrogen-generating electrode (11) is respectively connected to a plurality of pole tabs A (111), and one side of the buffer electrode (12) is respectively connected to a plurality of pole tabs B (121); The plurality of tabs A (111) are all connected to the conductive sheet A (110); The plurality of tabs B (121) are all connected to the conductive sheet B (120).

3. A wound electrode body according to claim 2, characterized in that: The distance between two adjacent pole tabs A (111) gradually increases along their length direction; the distance between two adjacent pole tabs B (121) gradually increases along their length direction.

4. An electrolysis device, characterized in that: An electrolytic cell (1) is provided, wherein a wound electrode body according to any one of claims 1 to 3 is arranged in the electrolytic cell (1); The top and bottom of the electrolytic cell (1) are connected with a liquid inlet and a liquid outlet; The electrolysis device comprises the following steps when performing electrolysis: Step 1, introducing electrolyte into the electrolytic cell (1), and controlling the hydrogen production electrode (11) and the buffer electrode (12) to be respectively powered; Step 2, continuously introducing electrolyte into the electrolytic cell (1) to displace and drain the electrolyte; Step 3: introducing hot electrolyte into the electrolytic cell (1). Step 4: continuously introduce electrolyte into the electrolytic cell (1) for replacement and emptying.

5. An electrolysis device according to claim 4, characterized in that: The electrolytic cell (1) is a closed structure, with a first liquid inlet pipe (131), a second liquid inlet pipe (132) and a third liquid inlet pipe (133) arranged at the bottom, and a first liquid outlet pipe (141), a second liquid outlet pipe (142) and a third liquid outlet pipe (143) arranged at the top; The first liquid inlet pipe (131), the second liquid inlet pipe (132) and the third liquid inlet pipe (133) are all provided with valves; It also includes a hydrogen gas-liquid separation tank (13a), an oxygen gas-liquid separation tank (14a) and a flushing tank (15a); The bottoms of the hydrogen gas-liquid separation tank (13a), the oxygen gas-liquid separation tank (14a) and the flushing tank (15a) are all connected to the water inlet end of a circulation pump (16a), and the circulation pump (16a) is respectively connected to the first liquid inlet pipe (131), the second liquid inlet pipe (132) and the third liquid inlet pipe (133); A shutoff valve A (13b), a shutoff valve B (14b) and a shutoff valve C (15b) are respectively provided on the pipelines connecting the circulation pump (16a) with the hydrogen gas-liquid separation tank (13a), the oxygen gas-liquid separation tank (14a) and the flushing tank (15a); The tops of the hydrogen gas-liquid separation tank (13a), the oxygen gas-liquid separation tank (14a) and the flushing tank (15a) are respectively connected to a first liquid outlet pipe (141), a second liquid outlet pipe (142) and a third liquid outlet pipe (143); The hydrogen gas-liquid separation tank and the oxygen gas-liquid separation tank are connected to the hydrogen gas storage tank and the oxygen gas storage tank respectively; The oxygen gas-liquid separation tank (14a) stores hot electrolyte, and the flushing tank (15a) stores electrolyte.

6. An electrolysis device according to claim 5, characterized in that: The tops of the hydrogen gas-liquid separation tank (13a) and the oxygen gas-liquid separation tank (14a) are both connected with water supply pipes, and water supply valves are arranged on the water supply pipes. A stirring mechanism and a liquid level sensor are arranged inside the hydrogen gas-liquid separation tank (13a) and the oxygen gas-liquid separation tank (14a).

7. An electrolysis device according to claim 6, characterized in that: It also includes a controller, which is connected to the valve, a switch arranged on the power supply circuit, a circulation pump (16a), a water supply valve, a stirring mechanism, a liquid level sensor, a shutoff valve A (13b), a shutoff valve B (14b) and a shutoff valve C (15b).

8. An electrolysis device according to claim 7, characterized in that: Gas flow sensors connected to the controller are respectively provided at the first liquid outlet pipe (141) and the second liquid outlet pipe (142).

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