Hydrogen production device and hydrogen production system

Abstract

The invention provides a hydrogen production device. The hydrogen production device comprises a reaction chamber cavity and a hydrogen production device, wherein the reaction chamber cavity is used for accommodating electrolyte; the photovoltaic power generation module is integrated with the reaction chamber cavity, solar energy can be converted into electric energy, and a potential difference is generated between a positive electrode and a negative electrode of the photovoltaic power generation module; the anode electrode is arranged in the cavity of the reaction chamber; the anode electrode is electrically connected to the anode of the photovoltaic power generation module and is at least partially soaked in the electrolyte; the cathode electrode is arranged in the cavity of the reaction chamber; the cathode electrode is electrically connected to the positive electrode of the photovoltaic power generation module and is at least partially immersed in the electrolyte; the hydrogen discharge pipeline and the oxygen discharge pipeline are used for discharging hydrogen and oxygen from the reaction chamber cavity respectively. The hydrogen production device is an integrated photovoltaic hydrogen production device, and efficient and low-cost photovoltaic hydrogen production can be achieved.

Description

Technical Field

[0001] The present disclosure relates to a hydrogen production device, and more particularly to an integrated photovoltaic hydrogen production device. Background Art

[0002] With the development of my country's economy, people are paying more and more attention to clean energy. Hydrogen energy, as a clean energy, plays a huge role in addressing global climate change. At present, the main methods of hydrogen production include coal gasification, natural gas, and water electrolysis. Among them, water electrolysis is the process of dissociating water molecules into hydrogen and oxygen under the action of direct current. Photovoltaic power generation is a power generation technology that converts light energy into electrical energy using the "photovoltaic effect". As a clean power generation technology, its application in water electrolysis can greatly reduce the electricity cost of water electrolysis and achieve economic energy. How to achieve photovoltaic hydrogen production efficiently and at low cost is an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present disclosure is to at least solve the shortcomings existing in the related art, and a hydrogen production device is proposed, comprising: a reaction chamber cavity, wherein the reaction chamber cavity contains an electrolyte; a photovoltaic power generation module, wherein the photovoltaic power generation module is integrated with the reaction chamber cavity, and can convert solar energy into electrical energy and generate a potential difference between the positive electrode and the negative electrode of the photovoltaic power generation module; an anode electrode arranged in the reaction chamber cavity, wherein the anode electrode is electrically connected to the positive electrode of the photovoltaic power generation module and is at least partially immersed in the electrolyte; a cathode electrode arranged in the reaction chamber cavity, wherein the cathode electrode is electrically connected to the positive electrode of the photovoltaic power generation module and is at least partially immersed in the electrolyte; and a hydrogen exhaust pipe and an oxygen exhaust pipe for respectively exhausting hydrogen and oxygen from the reaction chamber cavity.

[0004] According to the scheme, the integrated design makes the structure of the hydrogen production device more compact, which is conducive to reducing the volume and the length of the wiring. The integrated structure can reduce the power transmission loss of the photovoltaic power generation module during the hydrogen production process and improve the efficiency of photovoltaic hydrogen production. In addition, the integrated structure is convenient for overall transportation and installation, making the construction of the photovoltaic hydrogen production plant more convenient and efficient, saving labor costs. In addition, the junction box, inverter, battery and other equipment in the conventional photovoltaic hydrogen production system are eliminated, and the photovoltaic module directly generates direct current for the water electrolysis process, further reducing the cost of photovoltaic hydrogen production.

[0005] According to one embodiment, the photovoltaic power generation module is arranged in the reaction chamber cavity, and the reaction chamber cavity is at least partially transparent so that the photovoltaic power generation module can be irradiated by sunlight. The photovoltaic power generation module is built into the reaction chamber cavity to further improve the compactness of the hydrogen production device, and to protect the photovoltaic power generation module from the external environment, thereby increasing the service life and working stability of the photovoltaic power generation module.

[0006] According to one embodiment, the electrolyte is an aqueous electrolyte. Aqueous electrolytes are common and easy to obtain, which is beneficial to reducing the cost of hydrogen production.

[0007] According to one embodiment, a collecting space is formed in the reaction chamber cavity above the liquid level of the electrolyte, and further includes a separation plate, the separation plate separating the collecting space into a first space and a second space respectively connected to the hydrogen exhaust pipe and the oxygen exhaust pipe. The collecting space provides temporary storage space for hydrogen and oxygen respectively, which can increase the purity of the collected hydrogen and oxygen; and separates the liquid from the gas exhaust pipe, which is conducive to preventing the liquid from flowing into the gas exhaust pipe.

[0008] According to one embodiment, the photovoltaic power generation module is at least partially immersed in the electrolyte. The electrolyte can cool the photovoltaic power generation module to prevent the photovoltaic power generation module from affecting power generation efficiency and working stability due to excessive temperature.

[0009] According to one embodiment, the photovoltaic power generation module is a combination of one or more of a crystalline silicon cell assembly, a perovskite cell assembly, a perovskite stacked cell assembly, a cadmium telluride cell assembly, a gallium arsenide cell assembly, and a copper indium gallium selenide cell assembly.

[0010] According to one embodiment, the potential difference between the positive electrode and the negative electrode of the photovoltaic power generation module is greater than 1.23V.

[0011] According to one embodiment, the potential difference between the positive electrode and the negative electrode of the photovoltaic power generation module is greater than 1.6V.

[0012] According to one embodiment, the aqueous electrolyte is one of a sodium hydroxide aqueous solution, a sodium sulfate aqueous solution, a sulfuric acid aqueous solution, a lithium salt aqueous solution, and a potassium hydroxide aqueous solution.

[0013] According to one embodiment, the anode electrode and / or the cathode electrode is a photocatalytic electrode, and the reaction chamber cavity is at least partially transparent so that the photocatalytic electrode can be irradiated by sunlight. This solution can further increase the utilization rate of sunlight and thus improve the efficiency of hydrogen production.

[0014] According to one embodiment, the anode electrode and / or the cathode electrode is an inert electrode. Inert electrodes are common and easy to obtain, which is beneficial to reducing manufacturing costs.

[0015] According to one embodiment, a detector is provided on the hydrogen exhaust pipeline and / or the oxygen exhaust pipeline to monitor in real time whether the hydrogen production reaction is proceeding normally.

[0016] According to one embodiment, the reaction chamber cavity is rotatable to orient the photovoltaic power generation module toward the sun, so that the photovoltaic power generation module can always obtain maximum sunlight exposure, thereby improving power generation efficiency and hydrogen production efficiency.

[0017] According to one embodiment, a gas collection system is further included, the gas collection system including an oxygen collection device connected to the oxygen exhaust pipeline and / or a hydrogen collection device in the second space connected to the hydrogen exhaust pipeline, so as to facilitate the separate collection of oxygen and hydrogen for subsequent processing.

[0018] According to one embodiment, a gas check valve is provided on the hydrogen exhaust pipeline and / or the oxygen exhaust pipeline, so that the gas can only flow from the reaction chamber cavity to the oxygen collection device and the hydrogen collection device in one direction, thereby improving the gas collection efficiency.

[0019] According to one embodiment, a gas / water separation device is provided in the gas collection system to further increase the purity of the prepared gas.

[0020] According to one embodiment, the isolation plate is a transparent isolation plate, which is beneficial to increase the amount of sunlight received, thereby increasing the hydrogen production efficiency.

[0021] According to one embodiment, an electrolyte circulation system is also included to circulate the electrolyte in the reaction chamber cavity, so that the electrolyte in the reaction chamber cavity can be continuously replenished to prevent excessive consumption or complete consumption, thereby affecting the stability of hydrogen production.

[0022] A hydrogen production system, comprising: a plurality of hydrogen production devices as described in any one of the above contents; and a hydrogen collection device and an oxygen collection device, wherein the hydrogen exhaust pipes and the oxygen exhaust pipes of the plurality of hydrogen production devices are connected in parallel and connected to the hydrogen collection device and the oxygen collection device, respectively. The plurality of hydrogen production devices are connected in parallel to increase the overall efficiency of hydrogen production, and the hydrogen collection device and the oxygen collection device are shared to reduce the equipment cost.

[0023] According to one embodiment, a check valve is provided on the oxygen exhaust pipeline and the hydrogen exhaust pipeline of the at least one hydrogen production device, respectively, to prevent the gas from flowing back and forth between different hydrogen production devices, thereby facilitating the collection of increased gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a partial cross-sectional view of a hydrogen production device according to the present disclosure;

[0025] Figure 2 is another cross-sectional view of a hydrogen production apparatus according to the present disclosure, showing a pipeline connected to a reaction chamber chamber;

[0026] Figure 3is a perspective view of a hydrogen production device according to the present disclosure;

[0027] Figure 4 is a cross-sectional view of a hydrogen production system according to the present disclosure; and

[0028] Figure 5 is a perspective view of a hydrogen production system according to the present disclosure.

[0029] Figure markings: 1-reaction chamber cavity; 2-aqueous electrolyte; 3-isolation plate; 4-photovoltaic power generation module; 5-anode electrode; 6-cathode electrode; 7-first space; 8-second space; 9-hydrogen collection device; 10-oxygen collection device; 11-electrolyte circulation system; 12-gas check valve; 13-reaction detector. DETAILED DESCRIPTION

[0030] In order to make the purpose, scheme and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In the following description and claims, the directional term "longitudinal" refers to the length direction of the indicated feature, and transverse refers to the direction perpendicular to the longitudinal direction.

[0032] Figure 1 A partial cross-sectional view of a hydrogen production device according to an embodiment of the present disclosure is shown, and the hydrogen production device includes a reaction chamber cavity 1, the reaction chamber cavity 1 is basically sealed, and an electrolyte 2 is contained in the reaction chamber cavity 1. According to the hydrogen production principle of the present disclosure, water is electrolyzed using electrodes with a potential difference to produce hydrogen and oxygen, so the electrolyte 2 can be pure water. In order to further enhance the conductivity of the electrolyte 2, accelerate the reaction rate, and improve the electrolysis efficiency, the electrolyte 2 can also be other aqueous electrolytes, such as sodium hydroxide aqueous solution, sodium sulfate aqueous solution, sulfuric acid aqueous solution, lithium salt aqueous solution, potassium hydroxide aqueous solution. In addition, the present disclosure is not limited to aqueous electrolytes, and other types of electrolytes, such as solid or semi-solid electrolytes, can also be used. The reaction chamber cavity 1 also includes an oxygen exhaust pipe (not marked) and a hydrogen exhaust pipe (not marked) for discharging the generated oxygen and hydrogen.

[0033] In one embodiment of the present disclosure, Figure 1 As shown, the electrolyte 2 does not completely fill all the spaces in the reaction chamber cavity 1, so there is a space in the reaction chamber cavity above the liquid surface of the electrolyte 2 that is not occupied by the electrolyte 2, and the space can be used as a collection space for the generated gas. However, the present disclosure is not limited to this, and the electrolyte 2 can also fill the reaction chamber cavity 1, and a gas collection space is connected to the outside of the reaction chamber cavity.

[0034] Further Figure 1 As shown, when a collecting space is provided in the reaction chamber cavity 1, an isolation plate 3 is also provided. The isolation plate 3 is provided in the collecting space, and one end of the isolation plate 3 is at least partially immersed in the electrolyte 2, thereby dividing the collecting space into two independent spaces, namely a first space 7 and a second space 8, which are respectively connected to the oxygen exhaust pipe and the hydrogen exhaust pipe.

[0035] The hydrogen production device according to the present disclosure further includes a photovoltaic power generation module 4, which can convert solar energy into electrical energy. In a possible implementation, the photovoltaic power generation module can be a photovoltaic assembly. The photovoltaic assembly can include a cover plate, a packaging material layer, a solar cell layer, a packaging material layer, and a back plate stacked in sequence.

[0036] The solar cell layer is formed by connecting a plurality of solar cells via interconnectors (such as welding strips) to form a cell string, and the plurality of cell strings are connected via bus bars to form a solar cell layer.

[0037] The cover plate and the back plate can be made of photovoltaic glass, which has good sealing performance and can effectively prevent the electrolyte from entering the photovoltaic module and affecting the performance of the solar cell. The cover plate and the back plate can also be made of polymer materials, which are light in weight. It is understood that the cover plate material should be a transparent material.

[0038] Seals, such as aluminum profile frames, polymer material frames, etc., may be provided around the edges of the photovoltaic module to further prevent the electrolyte from entering the interior of the photovoltaic module and affecting the solar cells.

[0039] The solar cell may be a combination of one or more of a crystalline silicon solar cell, a perovskite solar cell, a crystalline silicon / perovskite stacked solar cell, a cadmium telluride cell, a gallium arsenide cell, and a copper indium gallium selenide cell.

[0040] When receiving sunlight, the photovoltaic power generation module 4 generates a potential difference with a constant direction between the positive and negative electrodes of its output, and the potential difference is, for example, greater than 1.23 V, and preferably greater than 1.6 V. The potential difference can be changed by adjusting the number of solar cells in the solar cell layer and / or the circuit connection method.

[0041] Optionally, the photovoltaic power generation module 4 may adopt a double-sided solar cell, and the inner surface of the reaction chamber cavity 1 may be provided with a reflective surface to reflect sunlight onto the back side of the photovoltaic power generation module 4 .

[0042] like Figure 1 As shown, the reaction chamber cavity 1 is in the shape of an elongated column, for example, a column with a circular cross section, a square cross section or a polygonal cross section, but the present disclosure is not limited thereto.

[0043] In one embodiment, the photovoltaic power generation module 4 is integrated with the reaction chamber cavity 1. It is understood that the term "integrated" means that the two are assembled together in a relatively fixed position so that they can be provided or replaced as a component. The photovoltaic power generation module 4 can be elongated and, for example, can be fixed to or attached to the outer wall of the reaction chamber cavity 1, such as the outer surface side or the inner surface side of the outer wall of the reaction chamber cavity 1, or formed as a part of the outer wall of the reaction chamber cavity 1, which is not shown in the figure.

[0044] In another possible implementation, Figure 1 As shown, the photovoltaic power generation module 4 is arranged in the reaction chamber cavity 1. In this case, the photovoltaic power generation module 4 can be enclosed in the reaction chamber cavity 1 and can be free from the influence of the external environment. Figure 1 As shown, the reaction chamber cavity 1 is at least partially transparent in this case, so that when the hydrogen production device is exposed to the sun, the photovoltaic power generation module 4 placed in the reaction chamber cavity 1 can receive sunlight. The photovoltaic power generation module 4 can have a longitudinal length substantially the same as the reaction chamber cavity 1 to increase the light receiving area, thereby increasing the power generation efficiency and thus improving the hydrogen production efficiency. The integrated design makes the structure of the hydrogen production device more compact, which is conducive to reducing the volume and reducing the length of the wiring. The integrated structure can reduce the power transmission loss of the photovoltaic power generation module 4 during the hydrogen production process and improve the efficiency of photovoltaic hydrogen production. And the integrated structure is convenient for overall transportation and installation, making the construction of the photovoltaic hydrogen production plant more convenient and efficient, saving labor costs. In addition, the junction box, inverter, battery and other equipment in the conventional photovoltaic hydrogen production system are also eliminated, and the photovoltaic module directly forms direct current for the water electrolysis process, which further reduces the cost of photovoltaic hydrogen production.

[0045] like Figure 1 As shown, preferably, the photovoltaic power generation module 4 can be further at least partially immersed in the electrolyte 2. The electrolyte 2 can help dissipate heat from the photovoltaic power generation module 4, prevent safety problems caused by overheating and reduction in power generation efficiency caused by overheating, and help to further improve the hydrogen production efficiency.

[0046] In addition, the hydrogen production device also includes an anode electrode 5 connected to the positive electrode of the photovoltaic power generation module 4 and a cathode electrode 6 connected to the negative electrode of the photovoltaic power generation module 4. When a potential difference is generated between the positive and negative electrodes of the photovoltaic power generation module 4, oxygen is generated at the anode electrode 5 and hydrogen is generated at the cathode electrode 6. Although not shown, the anode electrode 5 and the cathode electrode 6 can be electrically connected to the photovoltaic power generation module 4 in a sealed manner.

[0047] In the present disclosure, preferably, the anode electrode 5 and the cathode electrode 6 are inert electrodes, such as platinum electrodes, gold electrodes, graphite electrodes, etc. Since inert electrodes are used, they do not need to be replaced, which is conducive to the long-term stable operation of the hydrogen production device.

[0048] In the present disclosure, the anode electrode 5 and the cathode electrode 6 may also be photocatalytic electrodes, so that solar energy can be more fully utilized and the amount of hydrogen production can be increased.

[0049] The anode electrode 5 and the cathode electrode 6 are respectively located on both sides of the partition plate 3. Figure 1 As shown, the anode electrode 5 may be located below the first space 7, and the cathode electrode 6 may be located below the second space 8, so that oxygen enters the first space 7 through the electrolyte 2, and hydrogen enters the second space 8 through the electrolyte. In order to further increase the purity of the oxygen in the first space 7 and the hydrogen in the second space 8, the cathode electrode 6 and the anode electrode 5 may be as far apart as possible, such as Figure 1 shown.

[0050] It should be noted that the positive and negative electrodes of conventional photovoltaic modules are generally led out from the same position of the photovoltaic module backplane, but for the disclosed embodiment, since oxygen and hydrogen are generated at the positive and negative electrodes respectively, if the positive and negative electrodes are close to each other, the oxygen and hydrogen will be mixed and cannot be separated. Therefore, the positive and negative electrodes of the photovoltaic module can be led out from the opposite edges of the photovoltaic module respectively through circuit design, so that the positive and negative electrodes are far apart, so that the anode electrode and the cathode electrode are far apart, which is conducive to the separation of oxygen and hydrogen.

[0051] In a possible implementation, the reaction chamber cavity 1 is cylindrical, the photovoltaic module is rectangular, and the length direction of the photovoltaic module is arranged along the axial direction of the reaction chamber cavity 1, that is, the width direction of the photovoltaic module is arranged along the radial direction of the reaction chamber cavity 1. The positive and negative electrodes of the photovoltaic module are respectively led out from both sides in the width direction.

[0052] like Figure 2 and 3 As shown, the hydrogen production device according to the present disclosure further includes a gas collection system, which may include an oxygen collection device 10 communicating with the first space 7 and a hydrogen collection device 9 that is the same as the second space 8, such as Figure 2 shown.

[0053] like Figure 2 As shown, the hydrogen production device also includes a gas check valve 12, which can be respectively arranged between the reaction chamber cavity 1 and the oxygen collecting device 10 and between the reaction chamber cavity 1 and the hydrogen collecting device 9, so as to allow the gas to flow only in one direction from the reaction chamber cavity 1 to the oxygen collecting device 10 and the hydrogen collecting device 9, thereby improving the gas collection efficiency.

[0054] In one embodiment, the hydrogen collection device 9 and the oxygen collection device 10 are further provided with a hydrogen / water separation device and an oxygen / water separation device, respectively, which are not shown in the figure, to increase the purity of the collected hydrogen and oxygen. In addition, the hydrogen collection device 9 may also include a deoxygenation device, and the oxygen collection device 10 may also include a dehydrogenation device, to further ensure the purity of the collected hydrogen and oxygen.

[0055] In one embodiment, in order to monitor whether the hydrogen production reaction occurs, the hydrogen production device may further include a reaction detector 13, which may be configured to be connected to one of the first space 7 and the second space 8. When the reaction occurs, that is, when gas is generated, the reaction detector 13 can generate an obvious indication. In addition, when the reaction is suddenly interrupted, that is, when the generation of gas stops, the reaction detector 13 can also generate an obvious indication. As an example, the reaction detector 13 may include a balloon device. When gas is generated, the air pressure in the balloon device connected to the first space 7 or the second space 8 will increase, causing the balloon to expand, thereby indicating that the reaction is in progress; when the generation of gas stops, the air pressure in the balloon device connected to the first space 7 or the second space 8 will decrease, causing the balloon to shrink, thereby indicating that the reaction has stopped.

[0056] Figure 3 The three-dimensional view of the hydrogen production device is shown, and the surface of the photovoltaic power generation module 4 that receives sunlight is set to face upward, so that no matter when during the day, there is always sunlight shining on the surface. In one embodiment, the reaction chamber cavity 1 can rotate within a certain range so that the photovoltaic power generation module 4 contained therein always faces the sun as the sun moves.

[0057] The partition plate 3 can be arranged in a vertical direction and the plane where the partition plate 3 is located passes through the central axis of the long cylindrical reaction chamber cavity 1, so that when the reaction chamber cavity 1 is installed, the partition plate is perpendicular to the liquid surface of the electrolyte 2 and divides the space in the reaction chamber cavity 1 not occupied by the electrolyte 2 into a first space 7 and a second space 8 of exactly the same size. This symmetrical design facilitates the manufacture of the hydrogen production device, so that there is no need to specially distinguish the positions of the first space 7 and the second space 8 during installation.

[0058] The cathode electrode 5 and the anode electrode 6 can be completely immersed in the electrolyte 2 and located at both ends of the photovoltaic power generation module 4. Figure 3 There may be a plurality of cathode electrodes 5 and anode electrodes 6, which are arranged at intervals on both sides of the photovoltaic power generation module 4 and connected to the positive electrode and the negative electrode of the photovoltaic power generation module 4 respectively.

[0059] Furthermore, in order to promote the efficiency of the photovoltaic power generation module 4 in receiving light as much as possible, the partition plate 3 can be set as a transparent plate.

[0060] like Figure 3 As shown, the hydrogen production device may also include an electrolyte circulation system 11, which is connected to the reaction chamber cavity to replenish the electrolyte for the reaction chamber cavity 1, so that the electrolysis reaction can be carried out continuously and stably. In addition, the present disclosure may also be provided with an electrolyte detection system (not shown) to circulate or replenish the electrolyte according to the detection results of the electrolyte detection system.

[0061] Figure 4 and Figure 5 The hydrogen production system according to the present disclosure is shown in a cross-sectional view and a stereoscopic view respectively. The hydrogen production system includes a plurality of hydrogen production devices, which may be the same as those described above, and therefore, will not be described in detail.

[0062] like Figure 4 and 5 As shown, each reaction chamber cavity 1 is connected in parallel through pipes, for example, the hydrogen exhaust pipes (not marked) of each reaction chamber cavity 1 are connected in parallel, and a check valve is provided on each hydrogen exhaust pipe; the oxygen exhaust pipes (not marked) of each reaction chamber cavity 1 are connected in parallel, and a check valve is provided on each oxygen exhaust pipe.

[0063] In addition, the electrolyte circulation system 11 can be connected to the reaction chamber 1 of each hydrogen production device, so as to circulate electrolyte for each hydrogen production device. The electrolyte circulation system 11 is connected in parallel with the reaction chamber of each hydrogen production device through a check valve, for example.

[0064] With the aid of the check valve, when one of the hydrogen production units needs to be dismantled or replaced, the hydrogen production unit can be directly disconnected without the risk of hydrogen or oxygen leakage, and a new hydrogen production unit can be connected to the system.

[0065] This document describes in detail several exemplary embodiments of the present disclosure with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure may also be combined without exceeding the protection scope of the present disclosure, which is determined by the appended claims.

Claims

1. A hydrogen production device, comprising: A reaction chamber cavity, wherein the reaction chamber cavity contains an electrolyte; A photovoltaic power generation module, which is integrated with the reaction chamber cavity and is capable of converting solar energy into electrical energy and generating a potential difference between the positive electrode and the negative electrode of the photovoltaic power generation module; An anode electrode disposed in the reaction chamber cavity, the anode electrode being electrically connected to the positive electrode of the photovoltaic power generation module and at least partially immersed in an electrolyte; A cathode electrode disposed in the reaction chamber cavity, the cathode electrode being electrically connected to the positive electrode of the photovoltaic power generation module and at least partially immersed in an electrolyte; and A hydrogen exhaust pipe and an oxygen exhaust pipe are provided for exhausting hydrogen and oxygen from the reaction chamber cavity respectively.

2. The hydrogen production device according to claim 1, wherein: The photovoltaic power generation module is disposed in the reaction chamber cavity, and the reaction chamber cavity is at least partially transparent so that the photovoltaic power generation module can be irradiated by sunlight.

3. The hydrogen production device according to claim 2, wherein: A collecting space is formed in the reaction chamber cavity above the liquid level of the electrolyte, and further includes an isolation plate, which separates the collecting space into a first space and a second space respectively connected to the hydrogen exhaust pipe and the oxygen exhaust pipe.

4. The hydrogen production device according to claim 3, wherein: The photovoltaic power generation module is at least partially immersed in the electrolyte.

5. The hydrogen production device according to any one of claims 1 to 4, wherein: The hydrogen exhaust pipeline and / or the oxygen exhaust pipeline is provided with a detector.

6. The hydrogen production device according to any one of claims 3 to 4, further comprising a gas collection system, wherein the gas collection system comprises an oxygen collection device connected to the oxygen exhaust pipeline and / or a hydrogen collection device in the second space connected to the hydrogen exhaust pipeline.

7. The hydrogen production device according to any one of claims 3 to 4, wherein: The isolation plate is a transparent isolation plate.

8. The hydrogen production device according to any one of claims 2 to 4, wherein: The invention also comprises an electrolyte circulation system for circulating the electrolyte in the reaction chamber cavity.

9. A hydrogen production system comprising: A plurality of hydrogen production devices according to any one of claims 1 to 5; as well as A hydrogen collecting device and an oxygen collecting device, the hydrogen exhaust pipelines and the oxygen exhaust pipelines of the plurality of hydrogen production devices are connected in parallel and connected to the hydrogen collecting device and the oxygen collecting device respectively.

10. The hydrogen production system according to claim 9, wherein: Check valves are respectively arranged on the oxygen exhaust pipeline and the hydrogen exhaust pipeline of the at least one hydrogen production device.

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