Electrode plate assembly, hydrogen production equipment and preparation method

Abstract

The invention provides an electrode plate assembly, hydrogen production equipment and a preparation method, and the electrode plate assembly comprises a first electrode plate panel; the second polar plate panel and the first polar plate panel are stacked, and a mounting cavity is formed between the second polar plate panel and the first polar plate panel; the diaphragm is arranged between the second polar plate panel and the first polar plate panel, and the mounting cavity is divided into a first cavity and a second cavity by the diaphragm; the first electrode net structure is arranged in the first cavity, the first electrode net structure comprises a first electrode net and a second electrode net which are arranged in a stacked mode, the first electrode net is close to the diaphragm relative to the second electrode net, the first electrode net is provided with first net holes, the second electrode net is provided with second net holes, and the diameter of the first net holes is smaller than that of the second net holes; and the second electrode net structure is arranged in the second cavity. According to the technical scheme, the problem that the water electrolysis efficiency of an electrode plate assembly in the prior art is poor can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical equipment, and in particular to an electrode plate assembly, hydrogen production equipment and a preparation method thereof. Background Art

[0002] Compared with the traditional hydrogen production method that relies on fossil energy such as coal and natural gas, the use of renewable energy such as wind power and photovoltaics to electrolyze water to produce hydrogen does not produce additional carbon dioxide emissions during the hydrogen production process. It can achieve large-scale, green and clean production of hydrogen, which is an important direction for the future development of hydrogen energy and clean energy. Water electrolysis technology currently mainly includes alkaline water electrolysis and proton exchange membrane electrolysis (PEM) technology. PEM technology can work at high current density and is suitable for rapid response and small-scale distributed hydrogen production. Alkaline water electrolysis technology is relatively mature, with low equipment cost, and is suitable for large-scale hydrogen production.

[0003] Common alkaline water electrolysis usually uses a high-concentration potassium hydroxide aqueous solution (20wt% to 30wt%) with high conductivity as an electrolyte, and decomposes water into hydrogen and oxygen by applying direct current. During the electrolysis process, a reduction reaction occurs at the cathode to produce hydrogen (2H2O+2e - →H2+2OH - ), an oxidation reaction occurs at the anode to generate oxygen (4OH - →O2+2H2O+4e - ). OH in the electrolyte - Ions are transferred between the two electrodes to complete the electrochemical reaction cycle. The operating temperature of the alkaline electrolyzer is generally 70-90°C, with high electrolysis efficiency.

[0004] Generally speaking, electrochemical reactions occur on electrode plates, which are usually composed of multiple laminated electrode meshes. This can easily hinder the diffusion of electrolyte into the diaphragm, thereby affecting the efficiency of water electrolysis of the electrode plates. Summary of the invention

[0005] The main purpose of the present invention is to provide an electrode plate assembly, a hydrogen production device and a preparation method to solve the problem of poor efficiency of water electrolysis by the electrode plate assembly in the related art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an electrode plate assembly is provided, comprising: a first electrode plate panel; a second electrode plate panel, stacked with the first electrode plate panel, forming an installation cavity between the second electrode plate panel and the first electrode plate panel; a diaphragm, arranged between the second electrode plate panel and the first electrode plate panel, the diaphragm separating the installation cavity into a first chamber and a second chamber; a first electrode mesh structure, arranged in the first chamber, the first electrode mesh structure comprising a first electrode mesh and a second electrode mesh stacked, the first electrode mesh being arranged close to the diaphragm relative to the second electrode mesh, the first electrode mesh having a first mesh hole, the second electrode mesh having a second mesh hole, the diameter of the first mesh hole being smaller than the diameter of the second mesh hole; and a second electrode mesh structure, arranged in the second chamber.

[0007] Furthermore, the first electrode mesh structure further includes an elastic support member disposed between the first electrode mesh and the second electrode mesh to support the first electrode mesh and the second electrode mesh.

[0008] Furthermore, the elastic supporting member has a corrugated structure.

[0009] Furthermore, the corrugated structure includes a first corrugated segment extending along the X-axis direction and a second corrugated segment extending along the Y-axis direction, and the first corrugated segment and the second corrugated segment are woven together.

[0010] Furthermore, the electrode plate assembly also includes a reinforcing clamp, which is clamped on the outside of the first electrode mesh structure to fix the first electrode mesh and the second electrode mesh.

[0011] Furthermore, the reinforcement clamp includes a first clamp and a second clamp arranged around the outside of the first electrode mesh structure, the first end of the first clamp and the first end of the second clamp are hinged, the reinforcement clamp also includes a fastener passing through the second end of the first clamp and the second end of the second clamp, a clamping space for clamping the first electrode mesh structure is formed between the first clamp and the second clamp, a first limiting groove is provided between the first clamp and the outside of the first electrode mesh structure, and a thermal expansion compensation plate is arranged in the first limiting groove.

[0012] According to another aspect of the present invention, a hydrogen production device is provided, comprising an electrolytic cell and an electrode plate assembly arranged in the electrolytic cell, wherein the electrode plate assembly is the above-mentioned electrode plate assembly.

[0013] According to another aspect of the present invention, a method for preparing an electrode plate assembly is provided, which is used to prepare the above-mentioned electrode plate assembly, and the preparation method includes: stacking a first electrode plate panel, a first electrode mesh structure, a diaphragm, a second electrode mesh structure and a second electrode plate panel of the electrode plate assembly in sequence; and extruding the first electrode plate panel and / or the second electrode plate panel to cause the first electrode mesh structure to undergo compression deformation.

[0014] Furthermore, the step of squeezing the first electrode panel and / or the second electrode panel to cause the first electrode mesh structure to undergo compression deformation includes: applying a preset extrusion force to the first electrode panel and / or the second electrode panel so that the ratio of the volume of the elastic support part of the first electrode mesh structure after compression deformation to the volume of the elastic support part in a natural state is greater than or equal to 1:5 and less than or equal to 9:10.

[0015] Furthermore, before the step of sequentially stacking the first electrode panel, the first electrode mesh structure, the diaphragm, the second electrode mesh structure and the second electrode panel of the electrode plate assembly, the preparation method also includes: sequentially stacking the first electrode mesh, the elastic support member and the second electrode mesh of the first electrode mesh structure and arranging the center points of the first electrode mesh, the elastic support member and the second electrode mesh in a collinear manner; connecting the edge of the first electrode mesh with the edge of the second electrode mesh.

[0016] According to the technical solution of the present invention, the first electrode panel and the second electrode panel form an installation cavity, the other structures of the electrode plate assembly and the water electrolysis reaction occur in the installation cavity, the diaphragm is arranged in the installation cavity and separates the installation cavity into a first chamber and a second chamber, the diaphragm is used to block the flow of hydrogen and oxygen generated in the water electrolysis reaction between the first chamber and the second chamber, but does not hinder the flow of ions in the electrolyte between the first chamber and the second chamber, the first electrode mesh structure and the second electrode mesh structure are respectively electrically connected to the external structure to perform the water electrolysis reaction, the first electrode mesh structure includes a first electrode mesh and a second electrode mesh arranged in a stacked manner, the first electrode mesh is arranged close to the diaphragm relative to the second electrode mesh, the first electrode mesh has a first mesh hole, and the second electrode mesh has a second mesh hole, during the water electrolysis process, hydrogen or oxygen is generated on the first electrode mesh and the second electrode mesh and escapes in the form of bubbles, so that the diameter of the first mesh hole is smaller than the diameter of the second mesh hole, which is conducive to the formation of gas bubbles and faster escape of bubbles, avoids the accumulation of bubbles inside the first electrode mesh structure, reduces the resistance to gas escape, and improves the gas collection efficiency. In addition, such a configuration also helps prevent bubbles from forming air plugs in the electrolyte, thereby avoiding the situation of hindering the flow of the electrolyte, making it easier for the electrolyte to flow to the diaphragm, ensuring effective mass transfer and flow of the electrolyte, and thus ensuring the electrolysis efficiency of the electrode plate structure. Therefore, the technical solution of the present application can effectively solve the problem of poor efficiency of water electrolysis of the electrode plate assembly in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the split structure of an embodiment of an electrode plate assembly according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 A schematic diagram of the split structure of the first electrode mesh structure of the electrode plate assembly;

[0020] Figure 3 Shows Figure 1 A schematic side view of a reinforcement fixture for an electrode plate assembly;

[0021] Figure 4 A flow chart showing an embodiment of a method for preparing an electrode plate assembly according to the present invention;

[0022] Figure 5 Shows Figure 4 Optional process for the preparation method Figure 1 ;

[0023] Figure 6 Shows Figure 4 Optional process for the preparation method Figure 2 .

[0024] The above drawings include the following reference numerals:

[0025] 10. First electrode plate panel; 20. Second electrode plate panel; 30. Diaphragm; 40. First electrode mesh structure; 41. First electrode mesh; 42. Second electrode mesh; 43. Elastic support member; 50. Second electrode mesh structure; 60. Reinforcement clamp; 61. First clamp; 62. Second clamp; 63. Fastener. DETAILED DESCRIPTION

[0026] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] like Figures 1 to 3 As shown, the present application provides an electrode plate assembly, and an embodiment of the electrode plate assembly of the present application includes: a first electrode plate panel 10, a second electrode plate panel 20, a diaphragm 30, a first electrode mesh structure 40, and a second electrode mesh structure 50; the second electrode plate panel 20 and the first electrode plate panel 10 are stacked, and an installation cavity is formed between the second electrode plate panel 20 and the first electrode panel 10; the diaphragm 30 is arranged between the second electrode plate panel 20 and the first electrode panel 10, and the diaphragm 30 separates the installation cavity into a first chamber and a second chamber; the first electrode mesh structure 40 is arranged in the first chamber, and the first electrode mesh structure 40 includes a first electrode mesh 41 and a second electrode mesh 42 stacked, the first electrode mesh 41 is arranged close to the diaphragm 30 relative to the second electrode mesh 42, the first electrode mesh 41 has a first mesh, the second electrode mesh 42 has a second mesh, and the diameter of the first mesh is smaller than the diameter of the second mesh; the second electrode mesh structure 50 is arranged in the second chamber.

[0030] According to the technical solution of this embodiment, the first electrode panel 10 and the second electrode panel 20 form an installation cavity, and other structures of the electrode plate assembly and the water electrolysis reaction occur in the installation cavity. The diaphragm 30 is arranged in the installation cavity and separates the installation cavity into a first chamber and a second chamber. The diaphragm 30 is used to block the flow of hydrogen and oxygen generated in the water electrolysis reaction between the first chamber and the second chamber, but does not hinder the flow of ions in the electrolyte between the first chamber and the second chamber. The first electrode mesh structure 40 and the second electrode mesh structure 50 are respectively electrically connected to the external structure to perform the water electrolysis reaction. An electrode mesh structure 40 includes a first electrode mesh 41 and a second electrode mesh 42 which are stacked. The first electrode mesh 41 is arranged close to the diaphragm 30 relative to the second electrode mesh 42. The first electrode mesh 41 has a first mesh hole, and the second electrode mesh 42 has a second mesh hole. During the water electrolysis process, hydrogen or oxygen is generated on the first electrode mesh 41 and the second electrode mesh 42 and escapes in the form of bubbles. The diameter of the first mesh hole is smaller than the diameter of the second mesh hole, which is conducive to the formation of gas bubbles and the faster escape of bubbles, avoiding the accumulation of bubbles inside the first electrode mesh structure 40, reducing the resistance to gas escape, and improving the gas collection efficiency. In addition, such a setting also helps to prevent bubbles from forming gas plugs in the electrolyte, thereby avoiding the occurrence of situations that hinder the flow of the electrolyte, and making it easier for the electrolyte to flow to the diaphragm 30, ensuring the effective mass transfer and flow of the electrolyte, and thus ensuring the electrolysis efficiency of the electrode plate structure. Therefore, the technical solution of this embodiment can effectively solve the problem of poor efficiency of water electrolysis by the electrode plate assembly in the related art.

[0031] like Figure 2 As shown, the first electrode mesh structure 40 further includes an elastic support member 43 disposed between the first electrode mesh 41 and the second electrode mesh 42 to support the first electrode mesh 41 and the second electrode mesh 42. Specifically, the provision of the elastic support member 43 can, on the one hand, relatively increase the gap between the first electrode mesh 41 and the second electrode mesh 42, thereby making it easier for the electrolyte to flow, and on the other hand, can also apply a certain squeezing force to the first electrode mesh 41, thereby making the first electrode mesh 41 and the diaphragm 30 fit better.

[0032] like Figure 2 As shown, the elastic support member 43 has a corrugated structure. Specifically, such a configuration ensures the elastic force of the elastic support member 43 on the one hand, and also ensures that there is a certain gap between the elastic support member 43 and the first pole net 41 and the second pole net 42 on the other hand, so that the gas and the electrolyte can flow more easily.

[0033] like Figure 2As shown, the corrugated structure includes a first corrugated segment extending along the X-axis direction and a second corrugated segment extending along the Y-axis direction, and the first corrugated segment and the second corrugated segment are woven together. In addition, in this embodiment, the corrugated structure can also be a stacked mesh structure, the first corrugated segment and the second corrugated segment are woven together to form a layer of first mesh structure, and the corrugated structure also includes a third corrugated segment extending along the Z-axis direction, the third corrugated segment forms a layer of second mesh structure, and a layer of second mesh structure can be located between the two first mesh structures.

[0034] like Figure 2 as well as Figure 3 As shown, the electrode plate assembly further includes a reinforcing clamp 60, which is clamped on the outside of the first electrode mesh structure 40 to fix the first electrode mesh 41 and the second electrode mesh 42. Specifically, the first electrode mesh 41 and the second electrode mesh 42 can be connected together by edge welding, and the reinforcing clamp 60 is provided to further fix the first electrode mesh 41 and the second electrode mesh 42.

[0035] like Figure 3 As shown, the reinforcement clamp 60 includes a first clamp 61 and a second clamp 62 surrounding the outside of the first electrode mesh structure 40, the first end of the first clamp 61 and the first end of the second clamp 62 are hinged, the reinforcement clamp 60 also includes a fastener 63 penetrating the second end of the first clamp 61 and the second end of the second clamp 62, a clamping space for clamping the first electrode mesh structure 40 is formed between the first clamp 61 and the second clamp 62, a first limiting groove is provided between the first clamp 61 and the outside of the first electrode mesh structure 40, and a thermal expansion compensation sheet is provided in the first limiting groove. Specifically, the fastener 63 can be a fastening pin, and the thermal expansion compensation sheet can be a graphite sheet. During the electrolysis of water, the temperature of the thermal expansion compensation sheet continues to rise and expand, which offsets the stress generated by the mismatch of thermal expansion coefficients between the first electrode mesh structure 40 and the reinforcement clamp 60, and ensures the structural stability of the electrode plate assembly. In addition, an elastic washer is provided on one side of the thermal expansion compensation sheet close to the first clamp 61 . The elastic properties of the elastic washer can compensate for the dimensional change caused by thermal expansion, ensuring that the reinforcement clamp 60 always applies uniform pressure to the first electrode mesh structure 40 .

[0036] Specifically, in this embodiment, the first pole mesh 41 is a nickel electrode mesh with a catalyst loaded on the surface, the nickel electrode mesh is a flat mesh structure, the nickel wire diameter is 250 microns, the average thickness of the nickel electrode mesh is 500 microns, the nickel electrode mesh diameter is 1.6 meters, and the aperture is 60 mesh; the second pole mesh 42 is a nickel electrode mesh with a catalyst loaded on the surface, the nickel electrode mesh is a flat mesh structure, the nickel wire diameter is 200 microns, the average thickness of the nickel electrode mesh is 400 microns, the nickel electrode mesh diameter is 1.6 meters, and the aperture is 40 mesh; the plane diameter of the elastic support member 43 is 1.58 meters and the thickness is 0.4 centimeters; the first pole plate panel 10 and the second pole plate panel 20 both include a supporting component arranged on the inner side thereof, the supporting component is a corrugated plate with a supporting function, and the surface material is nickel; the diaphragm 30 is an alkaline electrolysis hydrogen production diaphragm, specifically a polyphenylene sulfide porous membrane.

[0037] In addition, in other embodiments, the first electrode mesh is a nickel electrode mesh with a catalyst loaded on its surface, the nickel electrode mesh is a planar mesh structure, the nickel wire diameter is 220 microns, the average thickness of the nickel electrode mesh is 440 microns, the nickel electrode mesh diameter is 1.8 meters, and the pore size is 80 meshes; the second electrode mesh is a nickel electrode mesh with a catalyst loaded on its surface, the nickel electrode mesh is a planar mesh structure, the nickel wire diameter is 180 microns, the average thickness of the nickel electrode mesh is 360 microns, the nickel electrode mesh diameter is 1.8 meters, and the pore size is 40 meshes; the plane diameter of the elastic support member is 1.78 meters and the thickness is 0.35 centimeters; the first electrode panel and the second electrode panel both include a nipple structure arranged on the inner side thereof, and the surface material is nickel; the diaphragm is an alkaline electrolysis hydrogen production diaphragm, specifically a polyphenylene sulfide porous membrane.

[0038] In addition, the present application also provides a hydrogen production device, the hydrogen production device of the present application includes an electrolyzer and an electrode plate assembly arranged in the electrolyzer, wherein the electrode plate assembly is the above-mentioned electrode plate assembly. The above-mentioned electrode plate assembly can effectively solve the problem of poor efficiency of water electrolysis by the electrode plate assembly in the related art, and the hydrogen production device having the above-mentioned electrode plate assembly also has the above-mentioned advantages.

[0039] In addition, if Figures 4 to 6 As shown, the present application also provides a method for preparing an electrode plate assembly, and the preparation method of the present application is used for an electrode plate assembly, wherein the electrode plate assembly is the above-mentioned electrode plate assembly. The above-mentioned electrode plate assembly can effectively solve the problem of poor efficiency of water electrolysis of the electrode plate assembly in the related art, and the hydrogen production equipment for preparing the above-mentioned electrode plate assembly also has the above-mentioned advantages.

[0040] Specifically, Figure 4As shown, the preparation method includes: step S30: stacking the first electrode panel 10, the first electrode mesh structure 40, the separator 30, the second electrode mesh structure 50 and the second electrode panel 20 of the electrode plate assembly in sequence; step S40: pressing the first electrode panel 10 and / or the second electrode panel 20 to compress and deform the first electrode mesh structure 40. In this way, the elastic support member 43 can press the first electrode mesh 41, so that the first electrode mesh 41 can be more closely attached to the separator 30.

[0041] like Figure 5 As shown, step S40: the step of squeezing the first electrode panel 10 and / or the second electrode panel 20 to compress and deform the first electrode mesh structure 40 includes: step S41: applying a preset squeezing force to the first electrode panel 10 and / or the second electrode panel 20 so that the ratio of the volume of the elastic support member 43 of the first electrode mesh structure 40 after compressing and deforming to the volume of the elastic support member 43 in the natural state is greater than or equal to 1:5 and less than or equal to 9:10. In this way, on the one hand, the adhesion effect between the first electrode mesh 41 and the diaphragm 30 is guaranteed, and on the other hand, it is guaranteed that there is enough space between the first electrode mesh 41 and the second electrode mesh 42 to ensure the flow of gas and electrolyte.

[0042] like Figure 5 As shown, step S30: before the step of sequentially stacking the first electrode panel 10, the first electrode mesh structure 40, the separator 30, the second electrode mesh structure 50 and the second electrode panel 20 of the electrode plate assembly, the preparation method further includes: step S10: sequentially stacking the first electrode mesh 41, the elastic support member 43 and the second electrode mesh 42 of the first electrode mesh structure 40 and arranging the center points of the first electrode mesh 41, the elastic support member 43 and the second electrode mesh 42 in a collinear manner; step S20: connecting the edge of the first electrode mesh 41 with the edge of the second electrode mesh 42. In this way, it is ensured that the first electrode mesh 41, the elastic support member 43 and the second electrode mesh 42 can all be aligned, thereby ensuring the uniform flow of gas and electrolyte.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrode plate assembly, characterized in that: include: A first electrode panel (10); A second electrode panel (20) is stacked with the first electrode panel (10), and a mounting cavity is formed between the second electrode panel (20) and the first electrode panel (10); A diaphragm (30) is arranged between the second electrode panel (20) and the first electrode panel (10), and the diaphragm (30) separates the installation cavity into a first chamber and a second chamber; a first electrode mesh structure (40) disposed in the first chamber, the first electrode mesh structure (40) comprising a first electrode mesh (41) and a second electrode mesh (42) which are stacked, the first electrode mesh (41) being disposed closer to the diaphragm (30) relative to the second electrode mesh (42), the first electrode mesh (41) having a first mesh opening, the second electrode mesh (42) having a second mesh opening, and the diameter of the first mesh opening being smaller than the diameter of the second mesh opening; The second electrode mesh structure (50) is arranged in the second chamber.

2. The electrode plate assembly according to claim 1, characterized in that: The first electrode mesh structure (40) further comprises an elastic support member (43) arranged between the first electrode mesh (41) and the second electrode mesh (42) to support the first electrode mesh (41) and the second electrode mesh (42).

3. The electrode plate assembly according to claim 2, characterized in that: The elastic support member (43) has a corrugated structure.

4. The electrode plate assembly according to claim 3, characterized in that: The corrugated structure includes a first corrugated segment extending along the X-axis direction and a second corrugated segment extending along the Y-axis direction, and the first corrugated segment and the second corrugated segment are woven together.

5. The electrode plate assembly according to any one of claims 1 to 4, characterized in that: The electrode plate assembly further comprises a reinforcing clamp (60), wherein the reinforcing clamp (60) is clamped on the outside of the first electrode mesh structure (40) to fix the first electrode mesh (41) and the second electrode mesh (42).

6. The electrode plate assembly according to claim 5, characterized in that: The reinforcing clamp (60) comprises a first clamp (61) and a second clamp (62) which are arranged around the outside of the first electrode mesh structure (40); the first end of the first clamp (61) and the first end of the second clamp (62) are hinged; the reinforcing clamp (60) further comprises a fastener (63) which is passed through the second end of the first clamp (61) and the second end of the second clamp (62); a clamping space for clamping the first electrode mesh structure (40) is formed between the first clamp (61) and the second clamp (62); a first limiting groove is provided between the first clamp (61) and the outside of the first electrode mesh structure (40); a thermal expansion compensation sheet is provided in the first limiting groove.

7. A hydrogen production device, comprising an electrolytic cell and an electrode plate assembly arranged in the electrolytic cell, characterized in that: The electrode plate assembly is the electrode plate assembly according to any one of claims 1 to 6.

8. A method for preparing an electrode plate assembly, used for preparing the electrode plate assembly according to any one of claims 2 to 4, characterized in that: The preparation method comprises: The first electrode plate panel (10), the first electrode mesh structure (40), the separator (30), the second electrode mesh structure (50) and the second electrode plate panel (20) of the electrode plate assembly are stacked in sequence; The first electrode panel (10) and / or the second electrode panel (20) are pressed to cause the first electrode mesh structure (40) to undergo compression deformation.

9. The preparation method according to claim 8, characterized in that: The step of pressing the first electrode panel (10) and / or the second electrode panel (20) to cause the first electrode mesh structure (40) to undergo compression deformation comprises: A preset extrusion force is applied to the first electrode panel (10) and / or the second electrode panel (20) so that the ratio of the volume of the elastic support member (43) of the first electrode mesh structure (40) after compression deformation to the volume of the elastic support member (43) in a natural state is greater than or equal to 1:5 and less than or equal to 9:

10.

10. The preparation method according to claim 8, characterized in that: Before the step of sequentially stacking the first electrode panel (10), the first electrode mesh structure (40), the separator (30), the second electrode mesh structure (50) and the second electrode panel (20) of the electrode plate assembly, the preparation method further comprises: The first electrode net (41), the elastic support member (43) and the second electrode net (42) of the first electrode net structure (40) are sequentially stacked and arranged so that the center points of the first electrode net (41), the elastic support member (43) and the second electrode net (42) are collinearly arranged; The edge of the first pole mesh (41) is connected to the edge of the second pole mesh (42).

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