Electrolysis cell, hydrogen production electrolytic tank and hydrogen production system

Abstract

The utility model relates to the technical field of hydrogen production equipment, and provides a small electrolysis chamber, a hydrogen production electrolytic tank and a hydrogen production system.The small electrolysis chamber comprises an anode plate, an anode electrode, a diaphragm, a cathode electrode and a cathode plate which are assembled in a matched mode; wherein the anode plate and the cathode plate are respectively arranged at two ends of the small electrolysis chamber, one of the anode plate and the cathode plate is of a mastoid structure, the other one of the anode plate and the cathode plate comprises a main plate and a punching and pulling support structure, the main plate adopts a flat plate, and the punching and pulling support structure is positioned on one side, facing the diaphragm, of the main plate; and compared with the mastoid structures, the contact areas of the protruding points of the punching and pulling supporting structures and the corresponding electrodes are larger. According to the utility model, the contact area with the corresponding electrode is greatly increased, the higher current density is achieved, and the punching and pulling support structure can be locally deformed, so that a certain support effect can be achieved, the long-period operation stability is improved, the assembly clearance can be absorbed, and the membrane polar distance can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production equipment, in particular to an electrolysis chamber, a hydrogen production electrolytic cell and a hydrogen production system. Background Art

[0002] Hydrogen energy has attracted considerable attention as an energy carrier with broad application prospects and a key raw material for industrial production. Hydrogen production through water electrolysis, driven by renewable energy, is a clean and sustainable energy conversion technology.

[0003] The electrolytic cell is the key to achieving the conversion of electrical energy into chemical energy. The electrolytic chamber of a traditional circular electrolytic cell usually adopts a double-nipple structure, pressing the positive and negative electrodes against the two sides of the diaphragm in a "top-to-top" manner, with the nipple in rigid contact with the electrode. The top-to-top assembly method requires high precision in component processing, assembly positioning, and tightening. To avoid puncturing the diaphragm, the distance between the electrode and the diaphragm cannot achieve the membrane pole distance. There is a gap between the electrode and the diaphragm, resulting in a large internal resistance of the electrolytic cell and high power consumption. In addition, due to the limitations of the plate width, the stamping characteristics of the nipple plate, and the mold, the number of nipples per unit area of ​​the plate is limited, resulting in high internal resistance, making it difficult to achieve higher current density and improve electrolysis efficiency. Utility Model Content

[0004] The utility model provides an electrolysis chamber, a hydrogen production electrolytic cell and a hydrogen production system, which are used to solve the defects of the prior art that the internal resistance of the electrolysis chamber is large and it is difficult to achieve higher current density and electrolysis efficiency, thereby reducing contact resistance and improving electrolysis efficiency.

[0005] The utility model provides an electrolysis chamber, comprising an anode plate, an anode electrode, a diaphragm, a cathode electrode and a cathode plate that are assembled in cooperation with each other; wherein, the anode plate and the cathode plate are respectively placed at the two ends of the electrolysis chamber, and one of the anode plate and the cathode plate is a mastoid structure, and the other comprises a main plate and a punching and pulling support structure, wherein the main plate is a flat plate, and the punching and pulling support structure is located on the side of the main plate facing the diaphragm; and the protruding point of the punching and pulling support structure is larger than that of the mastoid structure, and the contact area between the punching and pulling support structure and the corresponding electrode is larger.

[0006] According to an electrolysis chamber provided by the present invention, the cross section of the punching and pulling support structure along a direction perpendicular to the main electrode plate is a mesh structure.

[0007] According to an electrolysis chamber provided by the utility model, the mesh structure is a diamond mesh, a regular hexagonal mesh, a regular octagonal mesh or a fan-shaped mesh.

[0008] According to an electrolysis chamber provided by the present invention, the cathode plate includes a mastoid structure, and the anode plate includes a main plate and the punching and pulling support structure.

[0009] According to an electrolysis chamber provided by the present invention, the anode plate includes a mastoid structure, and the cathode plate includes a main plate and the punching and pulling support structure.

[0010] According to an electrolysis chamber provided by the utility model, the punching and pulling support structure is in point contact or surface contact with the corresponding electrode.

[0011] According to an electrolysis chamber provided by the utility model, the punching and pulling support structure is in surface contact with the corresponding electrode.

[0012] According to an electrolysis chamber provided by the utility model, an anode frame is provided on the periphery of the anode plate, and a cathode frame is provided on the periphery of the cathode plate.

[0013] The utility model also provides a hydrogen production electrolyzer, comprising:

[0014] An upper cover plate, a lower cover plate, and a plurality of electrolysis chambers as described above, wherein the plurality of electrolysis chambers are installed between the upper cover plate and the lower cover plate.

[0015] The utility model also provides a hydrogen production system, comprising the hydrogen production electrolyzer as described above.

[0016] The electrolysis chamber, hydrogen production electrolysis cell and hydrogen production system provided by the utility model are configured such that one of the anode plate and the cathode plate is configured as a nipple structure, and the other includes a main plate and a punching and pulling support structure. The main plate is a flat plate, and the punching and pulling support structure is located on the side of the main plate facing the diaphragm. The protruding points of the punching and pulling support structure are larger than those of the nipple structure, and the contact area between the punching and pulling support structure and the corresponding electrode is larger, which greatly increases the contact area with the corresponding electrode and achieves a higher current density. Moreover, the punching and pulling support structure can be locally deformed, which not only plays a certain supporting role and improves the long-term operation stability, but also absorbs the assembly gap and realizes the membrane pole distance. The above two aspects are conducive to reducing the internal resistance and improving the electrolysis efficiency.

[0017] The utility model also provides a hydrogen production electrolyzer, which comprises the electrolysis chamber as described above and thus has the various advantages as described above.

[0018] The present invention also provides a hydrogen production system, which comprises the hydrogen production electrolyzer as described above and thus has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a cross-sectional view of the electrolysis chamber provided by the utility model.

[0021] Reference numerals:

[0022] 1. Anode electrode; 2. Diaphragm; 3. Cathode electrode; 4. Mastoid structure; 5. Main electrode plate; 6. Punching and pulling support structure; 7. Anode frame; 8. Cathode frame. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0025] In the electrolysis chamber, the bipolar plates (anode plates and cathode plates) not only need to form a certain space between the corresponding electrodes through the support structure to provide space for the gas in the electrolysis reaction, but also need to have as much contact area as possible with the corresponding electrodes to achieve smaller contact resistance and improve electrolysis efficiency.

[0026] In the existing technology, a double mastoid structure is usually adopted for top-to-top arrangement, and the positive and negative electrodes are pressed against the two sides of the diaphragm. The top-to-top assembly method has high requirements on the processing accuracy, assembly positioning and tightening accuracy of parts. In order to avoid puncture of the diaphragm, the distance between the electrode and the diaphragm cannot achieve the membrane pole distance. There is a gap between the electrode and the diaphragm, the internal resistance of the electrolytic cell is large, the power consumption is high, and the electrolysis efficiency is low.

[0027] In response to the above problems, the following Figure 1 The utility model is described as an electrolysis chamber.

[0028] The first embodiment of the present invention is to provide an electrolysis chamber, comprising an anode plate, an anode electrode 1, a diaphragm 2, a cathode electrode 3 and a cathode plate that are assembled in cooperation with each other; wherein, the anode plate and the cathode plate are respectively placed at the two ends of the electrolysis chamber, one of the anode plate and the cathode plate is a nipple structure 4, and the other comprises a main plate 5 and a punching and pulling support structure 6, the main plate 5 is a flat plate, and the punching and pulling support structure 6 is located on the side of the main plate 5 facing the diaphragm 2; and the protruding point of the punching and pulling support structure 6 is larger than that of the nipple structure 4, and the contact area between the punching and pulling support structure 6 and the corresponding electrode is larger, which greatly increases the contact area between the punching and pulling support structure 6 and the corresponding electrode, achieving a higher current density; and the punching and pulling support structure 6 can be locally deformed, which not only plays a certain supporting role and improves the long-term operation stability, but also absorbs the assembly gap and realizes the membrane pole distance. The above two aspects are beneficial to reducing the internal resistance and improving the electrolysis efficiency.

[0029] Among them, the main pole plate 5 adopts a flat plate design and does not require secondary processing. The punching and pulling support structure 6 is assembled in such a way that the punching and pulling support structure 6 is stacked on the flat plate.

[0030] In a feasible embodiment of the present invention, the cross-section of the punch-pull support structure 6 along the direction perpendicular to the main electrode plate 5 is a mesh structure. The support function of the punch-pull support structure 6 is achieved through the mesh structure. The mesh structure can also provide a larger surface area, thereby further increasing the contact area between the punch-pull support structure 6 and the corresponding electrode, which helps to distribute the current more evenly, improve the current density, and reduce the internal resistance. Secondly, the punch-pull support structure 6 with a mesh structure has better elasticity and deformation ability. Since the connection points between the grids can withstand a certain amount of deformation, this structure can better adapt to various stress changes in the electrolysis process, thereby improving the operating stability of the electrolysis chamber. In addition, the mesh structure also helps to absorb gaps that may be generated during the assembly process and more effectively achieve membrane pole spacing. This close fit helps to reduce gas leakage and electrolyte leakage during the electrolysis process, thereby improving electrolysis efficiency.

[0031] In a feasible embodiment of the present invention, the mesh structure is a diamond mesh, a regular hexagonal mesh, a regular octagonal mesh or a fan-shaped mesh. The diamond mesh has the characteristics of uniform mesh and flat mesh surface. Its structure is flexible and can adapt to certain deformations, which helps to absorb assembly gaps and achieve tighter membrane pole spacing. The regular hexagonal mesh is composed of countless regular hexagons, and the six vertices of each hexagon can be connected to the vertices of other hexagons to form a staggered structure, which has high stability and strength. Each grid size of the regular hexagonal mesh is uniform, which can provide uniform current distribution and improve electrolysis efficiency. The structure of the regular octagonal mesh is more complex than the regular hexagonal mesh, and has a high degree of symmetry and stability. The regular octagonal mesh may provide better current distribution and lower internal resistance. The fan-shaped mesh helps to provide better support and stability in a specific direction.

[0032] In a feasible embodiment of the present invention, the cathode plate includes a nipple structure 4, and the anode plate includes a main plate 5 and a punch-pull support structure 6, that is, the nipple structure 4 is provided on the cathode side as a rigid support; the punch-pull support structure is adopted on the anode side to increase the area with the corresponding electrode and provide supporting force.

[0033] In a feasible embodiment of the present invention, the anode plate includes a mastoid structure 4, and the cathode plate includes a main plate 5 and a punching and pulling support structure 6, that is, the mastoid structure 4 is provided on the anode side as a rigid support; the cathode side adopts a punching and pulling support structure to increase the area of ​​the corresponding electrode and provide supporting force.

[0034] In the above two embodiments, the mastoid structure 4 and the punch-pull support structure 6 cooperate with each other, and the top-to-top installation method has low installation precision, is easy to install, and can avoid puncturing the diaphragm, which can further optimize the distribution of current within the electrolysis chamber. By optimizing the current distribution, it can reduce energy loss during the electrolysis process and improve electrolysis efficiency. The local deformation ability of the punch-pull support structure 6 enables it to adapt to various stress changes during the electrolysis process, improve the operational stability of the electrolysis chamber, help reduce deformation and cracks caused by long-term operation, and extend the service life of the electrolysis chamber.

[0035] In a feasible embodiment of the present invention, the punch-pull support structure 6 is in point contact or surface contact with the corresponding electrode. Surface contact ensures a more even distribution of current across the electrode, reducing the risk of local overheating and current concentration, thereby improving electrolysis efficiency and maximizing operational stability.

[0036] In one feasible embodiment of the present invention, the punching and pulling support structure 6 is a carbon steel structure. Carbon steel has high strength, good toughness, and wear resistance. The punching and pulling support structure 6 can withstand the various stresses and pressures generated during the electrolysis process, maintaining structural stability and durability. Carbon steel is easy to process and manufacture, and can be formed into the desired mesh structure through various molding processes. This allows the punching and pulling support structure 6 to be customized for different electrolysis chambers to meet the needs of various application scenarios.

[0037] It should be noted that the punching and pulling support structure 6 can also be supported by other materials, as long as it can achieve support and local deformation, and no specific limitation is made here.

[0038] In a feasible embodiment of the present invention, the periphery of the anode plate is provided with an anode pole frame 7, and the periphery of the cathode plate is provided with a cathode pole frame 8. The introduction of the anode pole frame 7 and the cathode pole frame 8 makes current conduction more uniform, and electrolytic reaction is more abundant, thereby improving electrolysis efficiency. The anode pole frame 7 and the cathode pole frame 8 provide additional support and fixing for the pole plate, strengthen the stability of whole electrolysis structure. By guiding the flow of gas or liquid, the anode pole frame 7 and the cathode pole frame 8 help to optimize the environmental conditions in the electrolysis chamber, further improve the quality and efficiency of the electrolysis process.

[0039] In summary, the utility model provides an electrode chamber, in which the bipolar plate on one side adopts a mastoid structure as a rigid support, the main polar plate on the other side adopts a flat plate, and the punching and pulling support structure 6 is stacked on the flat plate of the main polar plate 5. The punching and pulling support structure has many protruding points, which greatly increases the contact area with the electrode, has a small internal resistance, increases the electrolysis efficiency, and achieves a higher current density. The punching and pulling support structure 6 can be locally deformed, which not only plays a certain supporting role and improves the long-term operation stability, but also absorbs the assembly gap and realizes the membrane pole distance. The above two aspects are both conducive to reducing the internal resistance and improving the electrolysis efficiency.

[0040] The punched support structure 6 is not limited to a punched diamond mesh, a punched hexagonal mesh, or a punched fan mesh. The mastoid structure 4 and the punched support structure 6 can serve as anodes or cathodes, i.e., the anode mastoid structure 4 and the cathode punched support structure 6, or the anode punched support structure 6 and the cathode mastoid structure 4.

[0041] A second embodiment of the present invention provides a hydrogen production electrolyzer, comprising an upper cover plate, a lower cover plate, and a plurality of electrolysis chambers as described above, wherein the plurality of electrolysis chambers are installed between the upper cover plate and the lower cover plate.

[0042] The hydrogen production electrolyzer provided by the present invention, since it includes the electrolysis chamber as described above, can also greatly increase the contact area with the electrode, achieve a higher current density, reduce internal resistance, improve electrolysis efficiency, and reduce electrolysis energy consumption; in addition, the punching and pulling support structure can also be locally deformed, which not only plays a certain supporting role and improves long-term operation stability, but also absorbs the assembly gap and realizes the membrane electrode distance.

[0043] A third embodiment of the present invention provides a hydrogen production system, comprising the hydrogen production electrolyzer as described above.

[0044] The hydrogen production system provided by the present invention has the various advantages as described above because it includes the hydrogen production electrolyzer as described above.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or modes and features of different embodiments or modes described in this specification without contradiction.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electrolysis chamber, characterized in that: The invention comprises an anode plate, an anode electrode (1), a diaphragm (2), a cathode electrode (3) and a cathode plate which are assembled in cooperation with each other; wherein the anode plate and the cathode plate are respectively placed at two ends of the electrolysis chamber; one of the anode plate and the cathode plate is a mastoid structure (4); the other comprises a main plate (5) and a punching and drawing support structure (6); the main plate (5) is a flat plate; the punching and drawing support structure (6) is located on the side of the main plate (5) facing the diaphragm (2); and the protrusion of the punching and drawing support structure (6) is larger than that of the mastoid structure (4); and the contact area between the punching and drawing support structure (6) and the corresponding electrode is larger.

2. The electrolysis chamber according to claim 1, characterized in that The cross section of the punching and pulling support structure (6) along a direction perpendicular to the main pole plate (5) is a mesh structure.

3. The electrolysis chamber according to claim 2, characterized in that The mesh structure is a diamond mesh, a regular hexagonal mesh, a regular octagonal mesh or a fan-shaped mesh.

4. The electrolysis chamber according to any one of claims 1 to 3, characterized in that The cathode plate comprises a mastoid structure (4), and the anode plate comprises a main plate (5) and the punching and pulling support structure (6).

5. The electrolysis chamber according to any one of claims 1 to 3, characterized in that: The anode plate comprises a mastoid structure (4), and the cathode plate comprises a main plate (5) and the punching and pulling support structure (6).

6. The electrolysis chamber according to any one of claims 1 to 3, characterized in that: The punching and pulling support structure (6) is in surface contact with the corresponding electrode.

7. The electrolysis chamber according to claim 1, characterized in that The punching and pulling support structure (6) is a carbon steel structure.

8. The electrolysis chamber according to claim 1, characterized in that An anode pole frame (7) is provided on the periphery of the anode pole plate, and a cathode pole frame (8) is provided on the periphery of the cathode pole plate.

9. A hydrogen production electrolyzer, characterized in that: include: An upper cover plate, a lower cover plate, and a plurality of electrolysis chambers according to any one of claims 1 to 8, wherein the plurality of electrolysis chambers are installed between the upper cover plate and the lower cover plate.

10. A hydrogen production system, characterized in that: Comprising the hydrogen production electrolyzer as claimed in claim 9.

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