Electrolytic water electrode plate with two cavities

Abstract

The utility model relates to a one-plate two-cavity type electrolytic water pole plate relates to electrolytic water hydrogen production field. This technical scheme includes pole plate body, and the middle part has reaction area, and the periphery of reaction area has public flow channel mouth, and also has flow channel cover plate, and it has corresponding adaptation hole with public flow channel mouth, and it covers on pole plate body, forms micro flow channel between public flow channel mouth and reaction area, wherein, the outer periphery of public flow channel mouth on pole plate body has long strip shape through -hole, and flow channel cover plate has bending convex part on it, and the bending convex part passes through long strip shape through -hole and bends many times, makes pole plate body and flow channel cover plate be connected with the form of physical buckle. In this case, through the physical buckle structure of sheet metal bending, the reliable connection of flow channel cover plate and pole plate body is realized, does not need to stick, avoids the pollution of adhesive harmful substance to catalyst or membrane electrode, does not need to weld, avoids the destruction of plating layer when welding due to high temperature, is suitable for mass production.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis for hydrogen production technology, and in particular to a one-plate, two-cavity water electrolysis electrode plate. Background Technology

[0002] With the increasing global demand for clean energy, water electrolysis for hydrogen production, as a highly efficient and environmentally friendly method, is finding increasingly widespread application in the renewable energy sector. In water electrolysis systems, the electrode plate is a key component. The unique structure of a single-plate, two-chamber water electrolysis electrode plate effectively enables the water electrolysis reaction. To precisely guide the water required for the reaction from the common flow channel to the reaction zone, establishing an internal microchannel between the common flow channel and the reaction zone becomes essential. Internal microchannels are mainly divided into two types: open microchannels and closed microchannels. Closed microchannels are typically composed of stacked electrode plates and channel cover plates. This structure not only successfully constructs a medium transport channel from the common flow channel to the reaction zone but also provides reliable support for the membrane electrode assembly (MEA) covering the electrode plate. It effectively resists the gas pressure generated during operation, preventing the MEA from being forced into the microchannel, thus preventing MEA deformation and microchannel blockage. Compared to open microchannels, this structure exhibits significant advantages.

[0003] However, in practical applications, closed-loop microchannel structures face the technical challenge of connecting and fixing the channel cover plate to the electrode plate. Currently, most existing electrode plates are fixed by welding or bonding. Welding processes generate high temperatures, which can easily damage the precious metal plating on the electrode plate surface, affecting its performance and lifespan. Furthermore, because titanium electrode plates are typically thin, they are prone to burn-through during welding, and even if welding is completed, insufficient strength may exist, leading to the risk of detachment during use. While bonding avoids the drawbacks of high temperatures, it introduces adhesives. In the long-term operating environment of a water electrolysis system, these adhesives may leach harmful substances, which can contaminate the catalyst or membrane electrode, severely affecting the efficiency and stability of the water electrolysis reaction and hindering the further development and application of water electrolysis technology. Summary of the Invention

[0004] The purpose of this invention is to provide a single-plate, two-chamber type electrolytic water electrode to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A single-plate, two-cavity water electrolysis electrode plate, comprising: The electrode body has a reaction zone in its middle, and a common flow channel is located around the periphery of the reaction zone; and A flow channel cover plate having an adapter hole corresponding to the common flow channel opening is covered on the electrode plate body, so that a microchannel is formed between the common flow channel opening and the reaction zone; The electrode body has an elongated through hole on the outer periphery of the common flow channel opening, and the flow channel cover has a bent protrusion adapted to the elongated through hole. The bent protrusion passes through the elongated through hole and is bent multiple times, so that the electrode body and the flow channel cover are connected by a physical snap-fit.

[0006] In one possible implementation, a groove is formed on the electrode body between the common flow channel opening and the reaction zone, and the portion of the flow channel cover plate corresponding to the portion between the common flow channel opening and the reaction zone is in the form of a flat plate, so that the flow channel cover plate covers the electrode body to form the microchannel.

[0007] In one possible implementation, the electrode body is in the form of a flat plate between the common flow channel opening and the reaction zone, and the flow channel cover plate has a groove corresponding to the portion between the common flow channel opening and the reaction zone, so that the flow channel cover plate covers the electrode body to form the microchannel.

[0008] In one possible implementation, the bent protrusion passes through the elongated through-hole and is bent multiple times, with its end located at the middle of the inner side of the common flow channel opening.

[0009] In one possible implementation, the bending protrusion is bent three times, with each bending angle being 90°.

[0010] In one possible implementation, the elongated through-hole is 1-2 mm away from the edge of the common flow channel.

[0011] In one possible implementation, the electrode body is formed by etching or stamping.

[0012] The beneficial effects of the technical solution provided by this utility model include at least the following: This technical solution provides a single-plate, two-chamber electrolytic water electrode, comprising an electrode body with a reaction zone in its center and a common flow channel opening around the reaction zone; and a flow channel cover plate with matching holes corresponding to the common flow channel opening, covering the electrode body to form a microchannel between the common flow channel opening and the reaction zone. The electrode body has an elongated through-hole on the outer periphery of the common flow channel opening, and the flow channel cover plate has a bent protrusion adapted to the elongated through-hole. The bent protrusion passes through the elongated through-hole and is bent multiple times, connecting the electrode body and the flow channel cover plate through a physical snap-fit ​​connection. In this configuration, a reliable connection between the flow channel cover plate and the electrode body is achieved through a sheet metal bending physical snap-fit ​​structure; no adhesive is required, avoiding the release of harmful substances from adhesives that could contaminate the catalyst or membrane electrode; no welding is required, preventing damage to the plating due to high temperatures during welding, making it suitable for mass production. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] Figure 1 This diagram illustrates the structure of a one-plate, two-cavity electrolytic water electrode plate provided in an exemplary embodiment of the present invention.

[0015] Figure 2 It shows Figure 1 A magnified view of part B.

[0016] Figure 3 This diagram shows the structure behind the hidden flow channel cover of a one-plate, two-cavity electrolytic water electrode plate provided in an exemplary embodiment of the present invention.

[0017] Figure 4 It shows Figure 3 A magnified view of part C.

[0018] Figure 5 This diagram shows the structure of the flow channel cover of a one-plate, two-cavity electrolytic water electrode plate provided in an exemplary embodiment of the present invention before bending.

[0019] Figure 6 This diagram illustrates the structure of the flow channel cover plate of a two-chamber electrolytic water electrode plate provided in an exemplary embodiment of the present invention after bending.

[0020] Figure 7 It shows Figure 1 A schematic diagram of a partial cross-sectional structure at point A.

[0021] In the diagram: 1. Electrode body; 2. Flow channel cover; 3. Common flow channel opening; 4. Reaction zone; 5. Microchannel; 6. Long strip through hole; 7. Bending protrusion; 8. Adaptor hole. Detailed Implementation

[0022] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings of this utility model, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This diagram illustrates the structure of a single-plate, two-cavity water electrolysis electrode plate according to an exemplary embodiment of the present invention. Figure 2 It shows Figure 1 A magnified view of part B. Figure 3 This diagram shows a structural schematic of the hidden portion of the flow channel cover plate of a one-plate, two-cavity electrolytic water electrode plate provided in an exemplary embodiment of the present invention. Figure 4 It shows Figure 3 The enlarged schematic diagram at point C shows that the two-chamber electrolytic water electrode plate includes: an electrode plate body 1 and a flow channel cover plate 2. The electrode plate body 1 has a reaction zone 4 in the middle and a common flow channel opening 3 around the reaction zone 4. Figure 5 This diagram illustrates the structure of the flow channel cover of a one-plate, two-cavity electrolytic water electrode plate provided in an exemplary embodiment of the present invention before bending. Figure 6The diagram shows a schematic of the structure of the flow channel cover plate of the one-plate two-cavity electrolytic water electrode plate provided in an exemplary embodiment of the present invention after bending. The flow channel cover plate 2 has an adapter hole 8 corresponding to the common flow channel opening 3. The flow channel cover plate 2 covers the electrode plate body 1, so that a microchannel 5 is formed between the common flow channel opening 3 and the reaction zone 4. The electrode plate body 1 has an elongated through hole 6 on the outer periphery of the common flow channel opening 3. The flow channel cover plate 2 has a bent protrusion 7 adapted to the elongated through hole 6. The bent protrusion 7 passes through the elongated through hole 6 and is bent multiple times, so that the electrode plate body 1 and the flow channel cover plate 2 are connected in the form of physical snap-fit.

[0026] In this embodiment, the reaction zone 4 and common flow channel 3 of the electrode body 1 are designed to provide a basic space for the water electrolysis reaction, enabling efficient contact of reactants and ensuring smooth reaction. The microchannel 5 formed by the flow channel cover 2 and the electrode body 1 can precisely control the fluid distribution and flow rate, optimize the kinetics of the water electrolysis reaction, and improve the efficiency of hydrogen and oxygen production. The bent protrusion 7 on the flow channel cover 2 passes through the elongated through hole 6 on the electrode body 1 and is bent multiple times to achieve a stable connection between the two in a physical snap-fit ​​manner, avoiding the risks of catalyst contamination and membrane electrode damage caused by adhesive bonding, while avoiding damage to the coating caused by high welding temperatures, ensuring stable product performance. In addition, this process is simple and reliable, conducive to automated assembly, meets the needs of large-scale production, significantly reduces manufacturing costs, and enhances the industrialization advantages of the product.

[0027] Optionally, the electrode body 1 is formed by etching or stamping. Etching can precisely shape complex and fine structures, ensuring the accurate dimensions of components such as the reaction zone 4 and the common flow channel 3, thereby improving electrolysis performance; stamping, on the other hand, enables efficient mass production, ensuring the strength and consistency of the electrode body 1, and reducing production costs. Both methods can flexibly adapt to different production needs and precision standards.

[0028] In an optional embodiment, see [link to relevant documentation] Figures 1 to 4 A groove is provided on the electrode body 1 between the common flow channel opening 3 and the reaction zone 4. The part of the flow channel cover plate 2 corresponding to the common flow channel opening 3 and the reaction zone 4 is in the form of a flat plate, so that the flow channel cover plate 2 covers the electrode body 1 to form a micro channel 5.

[0029] In an optional embodiment (not shown in the figure), the electrode body 1 is in the form of a flat plate between the common flow channel 3 and the reaction zone 4, and the flow channel cover plate 2 has a groove corresponding to the portion between the common flow channel 3 and the reaction zone 4, so that the flow channel cover plate 2 covers the electrode body 1 to form a microchannel 5.

[0030] In this embodiment, the two optional embodiments described above achieve the construction of the microchannel 5 through differentiated structural design. The former utilizes the groove of the electrode body 1 and the flat plate of the channel cover 2 to cooperate, while the latter does the opposite. Both can precisely control the transmission path and flow rate of the fluid between the common channel opening 3 and the reaction zone 4. This bidirectional design increases manufacturing flexibility, allowing for flexible selection based on processing technology, cost, and performance requirements, ensuring electrolysis efficiency while improving product adaptability and industrialization feasibility.

[0031] Further, see Figures 3 to 7 The bent protrusion 7 passes through the elongated through-hole 6 and is bent multiple times, with its end located in the middle of the inner side of the common flow channel opening 3. The bent protrusion 7 is bent three times, with each bend angle being 90°.

[0032] In this embodiment, the bent protrusion 7 passes through the elongated through hole 6 and is bent 90° three times, with its end placed in the middle of the inner side of the common flow channel opening 3, which can form a stable physical snap-fit ​​connection, ensuring that the electrode plate body 1 and the flow channel cover plate 2 fit tightly together, preventing loosening and leakage, and ensuring the sealing and stability of the microchannel 5.

[0033] In one example, the elongated through-hole 6 is 1-2 mm away from the edge of the common flow channel 3 to ensure structural strength and snap-fit ​​space.

[0034] In one example, the thickness of the flow channel cover 2 is 0.2-0.5mm, balancing rigidity and lightweight.

[0035] In one example, the width of the elongated through-hole 6 is 0.2-0.3 mm greater than the thickness of the flow channel cover plate 2, so that the bent protrusion 7 can pass through smoothly and fit tightly.

[0036] Next, the working principle of the one-plate, two-cavity electrolytic water electrode plate involved in the embodiments of this utility model will be explained.

[0037] The reaction zone 4 in the middle of the electrode body 1 is the core area of ​​the electrolysis reaction, while the outer common flow channel 3 is the channel for electrolyte input and gas product output. The two form the basic framework. The flow channel cover 2 is precisely aligned with the common flow channel 3 through the adapter hole 8. After covering, according to the different designs of the grooves set on the electrode body 1 or the flow channel cover 2, micro channels 5 are formed to control the electrolyte flow direction and flow rate, and to provide suitable conditions for the reaction.

[0038] The bent protrusion 7 of the flow channel cover plate 2 passes through the elongated through hole 6 on the electrode plate body 1, and after three 90° bends, the end is fixed to the middle of the inner side of the common flow channel opening 3. This connection method avoids contamination by adhesive harmful substances and prevents damage to the coating by high welding temperature, ensuring structural reliability.

[0039] In practical operation, the electrolyte flows in from the common flow channel 3, is evenly distributed to the reaction zone 4 through the microflow channel 5, and undergoes an electrolysis reaction under the action of an electric field to produce hydrogen and oxygen. The generated gaseous products are then discharged through a specific channel. The entire process relies on precise structural design and process parameters to achieve a highly efficient and stable water electrolysis reaction, meeting the needs of large-scale production.

[0040] In summary, the two-chamber electrolytic water electrode plate provided by this technical solution includes an electrode plate body with a reaction zone in the middle and a common flow channel opening around the reaction zone; and a flow channel cover plate with matching holes corresponding to the common flow channel opening, which covers the electrode plate body to form a microchannel between the common flow channel opening and the reaction zone. The electrode plate body has an elongated through-hole on the outer periphery of the common flow channel opening, and the flow channel cover plate has a bent protrusion adapted to the elongated through-hole. The bent protrusion passes through the elongated through-hole and is bent multiple times, connecting the electrode plate body and the flow channel cover plate by a physical snap-fit ​​connection. In this case, a reliable connection between the flow channel cover plate and the electrode plate body is achieved through a sheet metal bending physical snap-fit ​​structure; no adhesive is required, avoiding the release of harmful adhesive substances that could contaminate the catalyst or membrane electrode; no welding is required, preventing the plating from being damaged by high temperatures during welding, making it suitable for mass production.

[0041] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A single-plate, two-cavity electrolytic water electrode, characterized in that, include: The electrode body (1) has a reaction zone (4) in its middle, and a common flow channel (3) is located around the reaction zone (4); and The flow channel cover (2) has an adapter hole (8) corresponding to the common flow channel opening (3) and covers the electrode body (1) to form a microchannel (5) between the common flow channel opening (3) and the reaction zone (4). The electrode body (1) has an elongated through hole (6) on the outer periphery of the common flow channel opening (3), and the flow channel cover (2) has a bent protrusion (7) that is adapted to the elongated through hole (6). The bent protrusion (7) passes through the elongated through hole (6) and is bent multiple times, so that the electrode body (1) and the flow channel cover (2) are connected in the form of physical snap-fit.

2. The single-plate, two-cavity water electrolysis electrode plate according to claim 1, characterized in that, The electrode body (1) has a groove between the common flow channel opening (3) and the reaction zone (4). The part of the flow channel cover plate (2) between the common flow channel opening (3) and the reaction zone (4) is in the form of a flat plate, so that the flow channel cover plate (2) covers the electrode body (1) to form the microchannel (5).

3. The single-plate, two-cavity electrolytic water electrode plate according to claim 1, characterized in that, The electrode body (1) is in the form of a flat plate between the common flow channel opening (3) and the reaction zone (4). The flow channel cover plate (2) has a groove in the part between the common flow channel opening (3) and the reaction zone (4) so ​​that the flow channel cover plate (2) covers the electrode body (1) to form the microchannel (5).

4. The single-plate, two-cavity electrolytic water electrode plate according to claim 1, characterized in that, The bent protrusion (7) passes through the elongated through hole (6) and is bent multiple times. Its end is located in the middle of the inner side of the common flow channel (3).

5. The single-plate, two-cavity electrolytic water electrode plate according to claim 1, characterized in that, The bending protrusion (7) is bent three times, and the bending angle is 90° for each time.

6. The single-plate, two-cavity electrolytic water electrode plate according to claim 1, characterized in that, The elongated through hole (6) is 1-2 mm away from the edge of the common flow channel (3).

7. The single-plate, two-cavity electrolytic water electrode plate according to claim 1, characterized in that, The electrode body (1) is formed by etching or stamping.

Images