An electrode module for an electrolytic cell and an electrolytic cell

Abstract

This invention provides an electrolytic cell electrode module and an electrolytic cell, comprising: an electrode plate, a sealing gasket, and two non-metallic electrode frames, the two non-metallic electrode frames including a first electrode frame and a second electrode frame, the first electrode frame and the second electrode frame having different structures; the sealing gasket includes a gasket body and a through hole disposed in the middle of the gasket body; the non-metallic electrode frame includes an electrode frame body and an electrolytic hole disposed in the middle of the electrode frame body; the first electrode frame and the second electrode frame are stacked, the electrode plate and the sealing gasket are both sandwiched between the first electrode frame and the second electrode frame, one side surface of the electrode plate contacts one of the electrode frame bodies, and the other side surface of the electrode plate contacts the gasket body. This invention can improve the airtightness of the electrode module.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic hydrogen production technology, and in particular to an electrolytic cell electrode module and an electrolytic cell. Background Technology

[0002] Currently, industrial alkaline water electrolysis for hydrogen production mostly uses bipolar pressure filter electrolyzers. The electrodes used in these electrolyzers are typically welded together from metal frames. These metal frames are manufactured by rolling metal sheets or machining cast metal rings, and are nickel-plated for protection. However, they are heavy and pose a risk of corrosion. Therefore, the industry has developed lightweight and corrosion-resistant non-metallic electrode frames to improve the service life of electrolyzers.

[0003] When assembling these non-metallic pole frames and metal pole plates, they cannot be welded together in the traditional way. Instead, they are installed and fixed using components such as pressure rings.

[0004] In this type of installation and connection, excessive force during installation and tightening can easily cause excessive compression of the non-metallic electrode frame, leading to cracks in the non-metallic electrode frame and thus affecting the sealing performance of the electrolytic cell. Utility Model Content

[0005] In view of this, the present invention provides an electrolytic cell electrode module and an electrolytic cell to at least solve the problem that non-metallic electrode frames are prone to cracking and reduce the sealing performance of the electrolytic cell.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] This utility model discloses an electrolytic cell electrode module, comprising: an electrode plate, a sealing gasket, and two non-metallic electrode frames, the two non-metallic electrode frames including a first electrode frame and a second electrode frame; the sealing gasket includes a gasket body and a through hole formed by the gasket body;

[0008] Both the first and second pole frames include a pole frame body and an electrolytic hole located in the middle of the pole frame body;

[0009] The first pole frame and the second pole frame are stacked, and the pole plate and the sealing gasket are sandwiched between the first pole frame and the second pole frame. One side surface of the pole plate is in contact with one of the pole frame bodies, and the other side surface of the pole plate is in contact with the gasket body.

[0010] Optionally, the gasket body has a width d1 along the radial direction of the through hole, and the width of the overlapping area when one side surface of the electrode plate contacts one of the electrode frame bodies is d2, where d1 ≥ d2.

[0011] Optionally, the gasket body has a width d1 along the radial direction of the through hole, and the width of the overlapping area when one side surface of the electrode plate contacts one of the electrode frame bodies is d2, where d1-d2≥2mm.

[0012] Optionally, the first and second pole frames have different structures.

[0013] Optionally, an electrode mounting groove is provided between the first electrode frame and the second electrode frame, and the electrode plate is embedded in the electrode mounting groove.

[0014] Optionally, along the stacking direction of the two non-metallic pole frames of different polarities, the depth of the pole plate mounting groove is less than the thickness of the pole plate.

[0015] Optionally, along the radial direction of the electrolytic hole, the width of the electrode mounting groove is W1, and the width of the electrode frame body is W2, where 0.1 ≤ W1 / W2 ≤ 0.25.

[0016] Optionally, the surface of the electrode plate that contacts the gasket body is provided with a first sealing groove;

[0017] The opening of the first sealing groove faces the sealing gasket, and the gasket body is at least partially embedded in the first sealing groove. Optionally, the electrode frame body of the first electrode frame has a first surface and a second surface that are parallel to each other, and the electrode mounting groove is provided on the portion of the first surface of the first electrode frame near its own electrolytic hole.

[0018] Optionally, the pole frame body of the second pole frame has a first surface and a second surface that are parallel to each other, and a second sealing groove is provided on the first surface of the second pole frame near the electrolytic hole.

[0019] The opening of the second sealing groove faces the electrode plate, and the gasket body is at least partially embedded in the second sealing groove.

[0020] Optionally, a diaphragm mounting groove is provided on the second surface of the second pole frame near the electrolysis hole.

[0021] Optionally, the non-metallic pole frame is a machined part made by machining a non-metallic blank.

[0022] Optionally, the electrolytic cell electrode module further includes tabs;

[0023] An electrode mounting groove is provided between the first electrode frame and the second electrode frame, and the electrode mounting groove connects the electrode plate mounting groove to the outside of the non-metallic electrode frame;

[0024] The electrode tab is embedded in the electrode tab mounting groove, one end of the electrode tab is electrically connected to the electrode plate, and the other end of the electrode tab extends out of the non-metallic electrode frame.

[0025] Optionally, the surface of the electrode tab is provided with a sealing layer.

[0026] Optionally, the tab mounting groove has at least one bend.

[0027] Optionally, the tabs are Z-shaped, S-shaped, or other non-linear shapes.

[0028] Optionally, the width of the tab mounting groove is 2mm to 5mm and the depth is 0.5mm to 3mm.

[0029] Optionally, the width of the electrode tab is 2mm to 5mm and the thickness is 1mm to 5mm.

[0030] Optionally, the other end of the electrode extends 5mm to 30mm beyond the non-metallic electrode frame.

[0031] This utility model also discloses an electrolytic cell, which includes any of the aforementioned electrolytic cell electrode modules;

[0032] Multiple electrolytic cell electrode modules are stacked and fixedly connected along the axial direction of the electrolytic hole.

[0033] Compared with the prior art, the electrolytic cell electrode module of this utility model has the following advantages:

[0034] This invention relates to an electrolytic cell electrode module that, based on the traditional combination of non-metallic electrode frames and metallic electrode plates, incorporates a sealing gasket with elastic deformation properties on one side of the electrode plate. When the electrode plate and sealing gasket are clamped and fixed between two non-metallic electrode frames, the interaction force between the electrode plate and the sealing gasket causes a slight deformation of the gasket, ensuring a tight fit between the gasket and the electrode plate. Furthermore, the space between the first and second electrode frames for mounting the electrode plate also ensures a tight fit between the gasket and the electrode frame, improving the airtightness of these two assembly gaps and preventing the leakage and diffusion of alkali gas along the assembly seams. Simultaneously, the sealing gasket, sandwiched between the electrode plate and one of the electrode frames, also provides a flexible buffer, preventing the metallic electrode plate from compressing the non-metallic electrode frame, reducing the risk of cracking the non-metallic electrode frame, and further enhancing the airtightness of the electrode module.

[0035] The electrolytic cell of this invention has the same advantages as the existing technology and electrolytic cell electrode module, which will not be elaborated here. Attached Figure Description

[0036] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0037] Figure 1 This is a cross-sectional schematic diagram of the structure of the first type of electrolytic cell electrode module in this embodiment of the present invention;

[0038] Figure 2 This is an embodiment of the present utility model. Figure 1 A schematic diagram of the stacked electrode modules of the electrolytic cell shown.

[0039] Figure 3 This is a cross-sectional schematic diagram of the structure of the second type of electrolytic cell electrode module in this embodiment of the present invention;

[0040] Figure 4 This is an embodiment of the present utility model. Figure 3 A schematic diagram of the stacked electrode modules of the electrolytic cell shown.

[0041] Figure 5 This is a cross-sectional schematic diagram of the structure of the third type of electrolytic cell electrode module in this embodiment of the present invention;

[0042] Figure 6 This is an embodiment of the present utility model. Figure 5 A schematic diagram of the stacked electrode modules of the electrolytic cell shown.

[0043] Figure 7 This is a schematic diagram of the end face of an electrolytic cell electrode module in an embodiment of this utility model;

[0044] Figure 8 This is an embodiment of the present utility model. Figure 7 An enlarged schematic diagram of position I;

[0045] Figure 9 This is an embodiment of the present utility model. Figure 8 A cross-sectional view along the BB direction;

[0046] Figure 10 This is an embodiment of the present utility model. Figure 9 A cross-sectional view along the CC direction;

[0047] Figure 11a This is a schematic diagram of the first shape of the electrode mounting groove in the embodiment of this utility model;

[0048] Figure 11b This is a schematic diagram of the second shape of the electrode mounting groove in the embodiment of this utility model;

[0049] Figure 11cThis is a schematic diagram of the third shape of the electrode mounting groove in the embodiments of this utility model;

[0050] Figure 11d This is a schematic diagram of the fourth shape of the electrode mounting groove in the embodiments of this utility model.

[0051] Explanation of reference numerals in the attached figures:

[0052] 10. Electrode plate; 101. First sealing groove; 11. Sealing gasket; 11a. Gasket body; 11b. Through hole; 12. Non-metallic electrode frame; 121. First electrode frame; 1211. Third sealing groove; 122. Second electrode frame; 1221. Second sealing groove; 1222. Fourth sealing groove; 1223. Diaphragm mounting groove; 12a. Electrode frame body; 12b. Electrolysis hole; 123. Electrode plate mounting groove; 124. Electrode tab mounting groove; 13. Electrode tab; 14. Sealing layer. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0054] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0055] It should be understood that the phrase "in one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0056] The electrolytic cell electrode module of this utility model refers to multiple electrode modules with the same structure that can be repeatedly found in an electrolytic cell. These multiple electrode modules with the same structure are stacked together and clamped and fixed by end plates to form a complete electrolytic cell.

[0057] The following detailed examples illustrate an electrolytic cell electrode module provided by this utility model. Figure 1 The diagram shown is a cross-sectional view of the structure of an electrolytic cell electrode module according to an embodiment of this application. The cross-section is parallel to the central axis of the electrode module. The electrode module includes an electrode plate 10, a sealing gasket 11, and two non-metallic electrode frames 12. The electrode plate 10 is a metal plate, and the non-metallic electrode frames 12 are made of high-strength, high-temperature resistant, and alkali-corrosion resistant polymer materials, such as PPSU (Polyphenylene sulfone), PEEK (Polyether-ether-ketone), and PSU (Polysulfone). The sealing gasket 11 is a sealing buffer disposed between the electrode plate 10 and one non-metallic electrode frame 12. It has the same high-temperature and alkali-corrosion resistant properties as the non-metallic electrode frame 12, but its hardness is lower than that of the non-metallic electrode frame 12, allowing it to have elastic deformation properties.

[0058] Combination Figure 1 As illustrated, the two non-metallic electrode frames 12 include a first electrode frame 121 and a second electrode frame 122. Both the first electrode frame 121 and the second electrode frame 122 include an electrode frame body 12a and an electrolytic hole 12b located in the middle of the electrode frame body 12a. That is, the non-metallic electrode frames 12 are both presented as annular plates. The sealing gasket 11 has a similar shape to the non-metallic electrode frames 12, having a gasket body 11a and a through hole 11b located in the middle of the gasket body 11a. The shape and size of the through hole 11b can be the same as the shape and size of the electrolytic hole 12b.

[0059] Figure 2 It also shows Figure 1The diagram illustrates a stacked assembly of the middle electrode plate 10, sealing gasket 11, and two non-metallic electrode frames 12 along the X direction. In one specific embodiment, the first electrode frame 121 and the second electrode frame 122 can have different structures. These different structures could mean that one electrode frame has a groove-shaped structure for mounting the electrode plate 10, while the other electrode frame may not have such a groove-shaped structure. Referring to the diagram, when the left-side first electrode frame 121 and the right-side second electrode frame 122 are stacked, a space is reserved between them for mounting the electrode plate 10 and the sealing gasket 11. Both the electrode plate 10 and the sealing gasket 11 are sandwiched between the first electrode frame 121 and the second electrode frame 122. One side surface of the electrode plate 10 contacts the electrode frame body 12a of the left-side first electrode frame 121, and the other side surface of the electrode plate 10 contacts the gasket body 11a of the right-side sealing gasket 11. The space formed between the first electrode frame 121 and the second electrode frame 122 with their different structures ensures that the assembly gap between the electrode plate 10 and the non-metallic electrode frame 12 is tight. Of course, besides the installation arrangement shown in the figure, the sealing gasket 11 can also be placed between the pole frame body 12a and the pole plate 10 of the first pole frame 121, or sealing gaskets 11 can be placed on both sides of the pole plate 10 and the corresponding non-metallic pole frame 12. In some embodiments, such as Figure 1 and Figure 2 As shown, the gasket body 11a has a width d1 radially along the through hole 11b, and the width of the overlapping area of ​​the electrode plate 10 and the right-side second electrode frame 122 is d2. The minimum dimension of d1 should be the same as d2 to ensure that the sealing gasket 11 can reduce the pressure from various points on the electrode plate 10. Figure 2 As can be understood from the diagram, when d1 and d2 are equal, the portion between the two pole frames 12 is filled by the gasket body 11a. The sealing gasket 11 can play a role in sealing and buffering. Due to its small area, the material used for the sealing gasket 11 can be reduced. The gap near the edge of the pole frame 12 also provides space for the deformation of the sealing gasket 11, which can prevent the sealing gasket 11 from protruding from the edge of the pole frame 12 after being squeezed and deformed.

[0060] In some implementations, it is also possible to... Figure 3 As illustrated, d1 can also be greater than d2. Besides being located between the electrode plate 10 and the right second electrode frame 122, the gasket body 11a extends in a direction away from the through hole 11b to the area between the left first electrode frame 121 and the right second electrode frame 122. Figure 4 It also shows Figure 3 A schematic diagram showing the intermediate electrode plate 10, sealing gasket 11, and two non-metallic electrode frames 12 stacked together along the X direction as shown in the figure. (Combined with...) Figure 4As illustrated, when d1 is greater than d2, the sealing gasket 11 fills the space between two adjacent pole frames 12, improving the sealing effect between the pole frame 12 and the pole plate 10, reducing the likelihood of alkali leakage. Simultaneously, the larger area of ​​the sealing gasket 11 effectively reduces the compressive strength it bears, contributing to a longer service life. Furthermore, d1-d2 ≥ 2mm, and the difference between d1 and d2 can be 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, or 2.0mm. Within this range, optimal sealing between the pole frame 12 and the pole plate 10, as well as between two pole frames 12, can be ensured.

[0061] In addition, combined Figure 2 and Figure 4 In addition to the illustration, it should also be noted that the inner diameter of the sealing gasket 11 (i.e., the diameter of the through hole 11b) and the inner diameter of the non-metallic electrode frame 12 (i.e., the diameter of the electrolysis hole 12b) can be designed to be the same size, which can prevent the gasket body 11a from extending inward to the electrolysis reaction zone where the electrode plate 10 is located, thus preventing a reduction in the effective reaction area.

[0062] This embodiment of the electrolytic cell electrode module, based on the traditional combination of a non-metallic electrode frame 12 and a metallic electrode plate 10, features a sealing gasket 11 with elastic deformation properties arranged on one side surface of the electrode plate 10. When the electrode plate 10 and the sealing gasket 11 are clamped and fixed between the two non-metallic electrode frames, the interaction force between the electrode plate 10 and the sealing gasket 11 causes a slight deformation of the sealing gasket 11, ensuring a tight fit between the sealing gasket 11 and the electrode plate 10. The fit between the sealing gasket 11 and the second electrode frame 122 is also tight, improving the airtightness of these two fit areas and preventing the leakage and diffusion of alkali gas along the fit seams. Simultaneously, the sealing gasket 11, sandwiched between the electrode plate 10 and the second electrode frame 122, also provides a flexible buffer, preventing the metallic electrode plate 10 from compressing the non-metallic electrode frame 12, reducing the risk of cracking the non-metallic electrode frame 12, and further improving the airtightness of the electrode module.

[0063] Optionally, such as Figure 5 As shown, in one embodiment, a first sealing groove 101 is provided on one surface of the electrode plate 10 that contacts the gasket body 11a. The first sealing groove 101 can be a multi-ring annular groove arranged around the center of the electrode plate 10, with the opening of each annular groove facing the sealing gasket 11. When the sealing gasket 11 is compressed, its deformed portion can be embedded into the first sealing groove 101. Thus, along the radial direction Y of the electrolytic hole 12b, the first sealing groove 101 can form an undulating obstruction structure, playing a sealing role.

[0064] Optionally, such as Figure 1As shown, in one embodiment, an electrode mounting groove 123 is provided between the first electrode frame 121 and the second electrode frame 122 of this utility model. The electrode mounting groove 123 can be a groove formed after material removal by mechanical processing of the surface of the first electrode frame 121 or the second electrode frame 122. The electrode plate 10 is embedded in the electrode mounting groove 123. Along the radial direction Y of the electrolytic hole 12b, the sidewall of the electrode mounting groove 123 can form a constraint and limiting function for the electrode plate 10, preventing the electrode plate 10 from slipping when it is stacked with the non-metallic electrode frame 12.

[0065] Optionally, such as Figure 1 As shown, in one embodiment, along the stacking direction X of the first pole frame 121 and the second pole frame 122, the depth of the pole plate mounting groove 123 is h1, and the thickness of the pole plate 10 is h2. By designing h1 to be less than h2, the pole plate 10 can protrude from the pole plate mounting groove 123, that is, the pole plate 10 protrudes from the surface of the non-metallic pole frame 12. Therefore, when the pole plate 10 contacts the gasket body 11a, it can apply sufficient pressure to the gasket body 11a, making the contact between the two tighter and the sealing better.

[0066] Optionally, such as Figure 1 As shown, in one embodiment, along the radial direction Y of the electrolytic hole 12b, the width of the electrode mounting groove 123 is W1, and the width of the electrode frame body 12a is W2. When W1 / W2 is too small, the electrode mounting groove 123 provides a smaller engagement width for the electrode 10, resulting in a weaker limiting effect on the electrode 10. When W1 / W2 is too large, the electrode mounting groove 123 provides a larger engagement width for the electrode 10, requiring more material to be removed through machining, which can easily lead to insufficient mechanical strength of the electrode frame body 12a. Therefore, in this embodiment, W1 / W2 should be at least 0.1 and at most 0.25. For example, W1 / W2 can be 0.10, 0.13, 0.15, 0.17, 0.19, 0.20, 0.23, or 0.25. Furthermore, in practical applications, while satisfying 0.1≤W1 / W2≤0.25, W1≥5mm can also be designed to ensure that the electrode plate has a relatively sufficient snap-fit ​​area.

[0067] Optionally, such as Figure 1 As shown, in one embodiment, the aforementioned electrode mounting groove 123 can be machined and disposed on the first electrode frame 121. Specifically, the electrode frame body 12a of the first electrode frame 121 has a first surface and a second surface that are parallel to each other, combined with... Figure 1 As illustrated, the first surface and the second surface can be the left and right surfaces of the electrode frame body 12a of the first electrode frame 121, respectively. The aforementioned electrode mounting groove 123 is provided on the first surface of the first electrode frame 121, centered near its own electrolysis hole 12b. Thus, the electrode plate 10 can be mounted and positioned using the first electrode frame 121.

[0068] Optionally, such as Figure 5 As shown, a second pole frame 122 is also illustrated, wherein the pole frame body 12a of the second pole frame 122 has a first surface and a second surface that are parallel to each other, combined with Figure 5 As illustrated, the first surface and the second surface can be the left and right surfaces of the pole frame body 12a of the second pole frame 122, respectively. A second sealing groove 1221 is provided on the first surface of the second pole frame 122, centered near its own electrolytic hole 12b. Similar to the first sealing groove 101, the second sealing groove 1221 can be a multi-ringed annular groove surrounding the center of the electrolytic hole 12b, with the opening of each annular groove facing the sealing gasket 11. When the sealing gasket 11 is compressed, its deformed portion can be embedded into the second sealing groove 1221. Thus, along the radial direction Y of the electrolytic hole 12b, the second sealing groove 1221 can form an undulating obstruction structure, achieving a sealing function.

[0069] Optionally, such as Figure 5 As shown, in one embodiment, a third sealing groove 1211 is provided on the second surface of the first electrode frame 121, at a location away from its own electrolytic hole 12b (i.e., the edge of the first electrode frame 121). Similar to the aforementioned first sealing groove 101, the third sealing groove 1211 can be a multi-ringed annular groove surrounding the center of the first electrode frame 121, with the opening of each annular groove facing away from the first surface. Thus, when multiple electrode modules are stacked and fixed, a sealing gasket can be provided or not provided between two adjacent electrode modules. Along the radial direction Y of the electrolytic hole 12b, the third sealing groove 1211 can form an uneven obstruction structure at the contact surface of two adjacent electrode modules, thereby achieving a sealing effect.

[0070] Optionally, such as Figure 5 As shown, in one embodiment, a fourth sealing groove 1222 is provided on the second surface of the second electrode frame 122, at a location away from its own electrolytic hole 12b (i.e., at the edge of the second electrode frame 122). Similar to the aforementioned first sealing groove 101, the fourth sealing groove 1222 can be a multi-ringed annular groove surrounding the center of the second electrode frame 122, with the opening of each annular groove facing away from the first surface. Thus, when multiple electrode modules are stacked and fixed, a sealing gasket can be provided or not provided between two adjacent electrode modules. Along the radial direction Y of the electrolytic hole 12b, the fourth sealing groove 1222 can form an uneven obstruction structure at the contact surface of two adjacent electrode modules, thereby achieving a sealing effect.

[0071] Optionally, such as Figure 5As shown, a diaphragm mounting groove 1223 is provided on the second surface of the second pole frame 122, near its own electrolysis hole 12b (i.e., the inner part of the second pole frame 122). The diaphragm mounting groove 1223 can constrain and limit the diaphragm installed at this position, preventing the diaphragm from slipping or moving.

[0072] Based on the descriptions of the foregoing embodiments, it can be understood that the first sealing groove 101 and the second sealing groove 1221 are both close to the electrolytic hole 12b and located inside the electrode module, forming an internal sealing structure. The third sealing groove 1211 and the fourth sealing groove 1222 are both far from the electrolytic hole 12b and located at the edge of the electrode module, forming an external sealing structure. The coexistence of internal and external sealing structures can significantly improve the sealing performance.

[0073] Optionally, in one embodiment, the non-metallic pole frame 12 of this utility model can be a machined part manufactured using a combination of injection molding and machining processes. Specifically, plastic material can be injected into an injection mold first, and after the plastic material cools and solidifies, a non-metallic blank is obtained. This non-metallic blank has the general outline of the non-metallic pole frame 12. Then, the non-metallic blank is finely machined by machining methods such as turning and milling to remove material, thereby obtaining the non-metallic pole frame 12 of the designed dimensions. Compared with the non-metallic pole frame 12 obtained by traditional simple injection molding, this machined part has lower costs, shorter time, and fewer defects in the injection molding stage because the mold on which the non-metallic blank depends is simpler. After machining, a non-metallic pole frame 12 with higher precision can be obtained.

[0074] Optionally, regarding the non-metallic electrode frame 12 used in this embodiment of the present invention, it is impossible to measure the voltage and temperature of each cell in the electrolytic cell by connecting wires to the surface of the non-metallic electrode frame 12 during operation, which is not conducive to maintenance and inspection. To improve the convenience of maintenance and inspection, in one embodiment of this invention, as follows... Figure 7 As shown, it demonstrates Figure 6 The schematic diagram shown is of the end face of the electrode module, that is... Figure 6 for Figure 7 A schematic diagram of the cross-section along the AA direction. It should be noted that the aforementioned... Figure 2 or Figure 4 To compare in electrode modules with corresponding structural shapes Figure 6 A schematic diagram obtained by sectioning along the AA direction. Combined with... Figure 8 The enlarged view shown and Figure 9 and Figure 10The partial cross-sectional view shows that the electrode module of this embodiment also includes a tab 13, which can be a copper or other conductive metal foil. A tab mounting groove 124 is provided between the first electrode frame 121 and the second electrode frame 122. The tab mounting groove 124 can be formed on the surface of either the first electrode frame 121 or the second electrode frame 122. When the two are stacked, a channel for the tab 13 to pass through is formed. The tab mounting groove 124 connects the electrode plate mounting groove 123 to the outside of the non-metallic electrode frame 12. Before the first electrode frame 121 and the second electrode frame 122 are stacked and fixed, the tab 13 is pre-embedded in the tab mounting groove 124. One end of the tab 13 is electrically connected to the electrode plate 10, and the other end of the tab 13 extends out of the outside of the non-metallic electrode frame 12.

[0075] Therefore, the temperature sensor and voltage sensor can be electrically connected to the tab 13, and the cell voltage and cell temperature can be measured by the tab 13, which extends from the outside into the inside and is electrically connected to the electrode plate 10.

[0076] Optionally, to prevent the gaseous alkali in the small chamber of the electrolytic cell from diffusing along the tab mounting groove 124, such as Figure 9 and Figure 10 As shown, a sealing strip or sealant can be wrapped around the surface of the tab 13 to form a sealing layer 14, which seals the assembly gap between the tab mounting groove 124 and the tab 13.

[0077] Optionally, in one embodiment, the tab mounting groove 124 has at least one bend, which makes the channel for the diffusion of alkali gas along the tab mounting groove 124 tortuous, thereby providing an obstruction effect and a sealing function. For example, as... Figures 11a to 11d As shown, different shapes of tab mounting grooves 124 are displayed on the surface of the first pole frame 121. When the tab mounting groove 124 is Z-shaped, S-shaped or other non-linear shape, the shape of the tab 13 embedded in the tab mounting groove 124 can be the same.

[0078] Optionally, in one embodiment, when the cross-sectional area of ​​the aforementioned tab mounting groove 124 is large, the cross-section of the tab 13 that can be accommodated is also large, resulting in greater flow performance. When the cross-sectional area of ​​the tab mounting groove 124 is small, the risk of gaseous alkali diffusing along the tab mounting groove 124 is correspondingly reduced. Therefore, taking a rectangular cross-section tab mounting groove 124 as an example, its width can be between 2mm and 5mm (e.g., 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm), and its depth can be between 0.5mm and 3mm (e.g., 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm). For tab 13, its width can be between 2mm and 5mm (e.g., 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm), and its thickness can be between 1mm and 5mm (e.g., 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm).

[0079] It is understood that for the matching tab mounting groove 124 and tab 13, the width of tab 13 shall not exceed the width of tab mounting groove 124, and the thickness of tab 13 shall not exceed the depth of tab mounting groove 124, so as to ensure that tab 13 can be smoothly embedded into tab mounting groove 124.

[0080] Optionally, for the tab 13, when its length extending from the non-metallic pole frame 12 is short, the wiring becomes more difficult, and when the length is long, it is easy to waste materials. Therefore, the length of the tab 13 extending from the surface of the non-metallic pole frame 12 is 5mm to 30mm (e.g., 5mm, 6mm, 9mm, 10mm, 15mm, 20mm, 25mm, 30mm).

[0081] This embodiment of the invention also provides an electrolytic cell, which includes any of the electrolytic cell electrode modules described in the foregoing embodiments. Multiple electrolytic cell electrode modules are stacked and fixedly connected along the axial direction of the electrolytic hole 12b. The two ends of the electrolytic cell are two end plates used to clamp and fix all the electrode modules.

[0082] This type of electrolytic cell has a longer service life due to the use of non-metallic electrode frames. Building upon some of the aforementioned embodiments, the electrolytic cell's sealing performance can be improved by employing sealing gaskets or designing sealing grooves. In other embodiments, the addition of electrode tabs further facilitates monitoring the electrolytic cell's operating status.

[0083] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0084] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrolyser electrode module, characterised in that, include: The device comprises an electrode plate, a sealing gasket, and two non-metallic electrode frames, the two non-metallic electrode frames including a first electrode frame and a second electrode frame; the sealing gasket includes a gasket body and a through hole disposed in the middle of the gasket body. Both the first and second pole frames include a pole frame body and an electrolytic hole located in the middle of the pole frame body; The first pole frame and the second pole frame are stacked, and the pole plate and the sealing gasket are sandwiched between the first pole frame and the second pole frame. One side surface of the pole plate is in contact with one of the pole frame bodies, and the other side surface of the pole plate is in contact with the gasket body.

2. The electrolyzer electrode module of claim 1, wherein, The gasket body has a width d1 along the radial direction of the through hole, and the width of the overlapping area when one side surface of the electrode plate contacts one of the electrode frame bodies is d2, where d1 ≥ d2.

3. The electrolyzer electrode module of claim 1, wherein, The gasket body has a width d1 along the radial direction of the through hole, and the width of the overlapping area when one side surface of the electrode plate contacts one of the electrode frame bodies is d2, where d1-d2≥2mm.

4. The electrolyzer electrode module of claim 1, wherein, The first and second pole frames have different structures.

5. The electrolyzer electrode module of any one of claims 1-4, wherein, An electrode mounting groove is provided between the first electrode frame and the second electrode frame, and the electrode plate is embedded in the electrode mounting groove.

6. The electrolyzer electrode module of claim 5, wherein, Along the stacking direction of the first and second pole frames, the depth of the pole plate mounting groove is less than the thickness of the pole plate.

7. The electrolyzer electrode module of claim 5, wherein, Along the radial direction of the electrolytic hole, the width of the electrode mounting groove is W1, and the width of the electrode frame body is W2, where 0.1 ≤ W1 / W2 ≤ 0.

25.

8. The electrolyzer electrode module of any one of claims 1-4, wherein, The surface of the electrode plate that contacts the gasket body is provided with a first sealing groove; The opening of the first sealing groove faces the sealing gasket, and the gasket body is at least partially embedded in the first sealing groove.

9. The electrolyzer electrode module of any one of claims 1-4, wherein, The first electrode frame has a first surface and a second surface that are parallel to each other, and the electrode mounting groove is provided on the first surface of the first electrode frame near the electrolytic hole.

10. The electrolyzer electrode module of any one of claims 1-3, wherein, The second pole frame has a first surface and a second surface that are parallel to each other, and a second sealing groove is provided on the first surface of the second pole frame near the electrolytic hole. The opening of the second sealing groove faces the electrode plate, and the gasket body is at least partially embedded in the second sealing groove.

11. The electrolyzer electrode module of claim 10, wherein, A diaphragm mounting groove is provided on the second surface of the second pole frame near the electrolysis hole.

12. The electrolyzer electrode module of any one of claims 1-3, wherein, The non-metallic pole frame is a machined part made by mechanically processing a non-metallic blank.

13. The electrolyzer electrode module of any one of claims 1-3, wherein, The electrolytic cell electrode module also includes electrode tabs; An electrode mounting groove is provided between the first electrode frame and the second electrode frame, and the electrode mounting groove connects the electrode plate mounting groove to the outside of the non-metallic electrode frame; The electrode tab is embedded in the electrode tab mounting groove, one end of the electrode tab is electrically connected to the electrode plate, and the other end of the electrode tab extends out of the non-metallic electrode frame.

14. The electrolyzer electrode module of claim 13, wherein, The surface of the electrode tab is provided with a sealing layer.

15. The electrolyzer electrode module of claim 13, wherein, The tab mounting groove has at least one bend.

16. The electrolyzer electrode module of claim 13, wherein, The electrode tabs are Z-shaped or S-shaped.

17. The electrolyzer electrode module of claim 13, wherein, The tab mounting groove (124) has a width of 2mm to 5mm and a depth of 0.5mm to 3mm.

18. The electrolyzer electrode module of claim 13, wherein, The tabs are 2mm to 5mm wide and 1mm to 5mm thick.

19. The electrolyzer electrode module of claim 13, wherein, The other end of the tab protrudes outside the non-metallic pole frame by a length of 5-30 mm.

20. An electrolytic cell characterized by, The electrolytic cell comprises the electrolytic cell electrode module of any one of claims 1-19. A plurality of the electrolytic cell electrode modules are fixedly connected in a stacked manner along the axial direction of the electrolytic hole.

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