Polar plate and electrolytic cell
By designing multiple flow-guiding protrusions and flow-guiding holes on the electrode plate, the problem of uneven electrolyte flow was solved, and the electrolyte was evenly distributed on the electrode plate surface, which improved electrode life and reduced energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNGROW HYDROGEN SCI &TECH CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-06-23
Smart Images
Figure CN224395053U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrolysis technology, and in particular to an electrode plate and an electrolytic cell. Background Technology
[0002] Currently, the electrode surface is formed by flow-guiding structures such as papillae, stretched mesh, or elastic mesh, which creates a free flow field structure. This results in uneven flow distribution in different areas of the small chamber, leading to uneven temperature and current density distribution, reduced electrode life, and increased DC power consumption. Utility Model Content
[0003] The main objective of this application is to provide an electrode plate and an electrolytic cell that aim to improve the uniformity of electrolyte distribution on the electrode plate surface.
[0004] To achieve the above objectives, the electrode plate proposed in this application includes a plate body and an electrode frame surrounding the plate body; wherein, the electrode frame is provided with an electrolyte inlet through which the electrolyte flows into the plate body and an electrolytic product outlet opposite to the electrolyte inlet; the plate body is provided with a plurality of guiding protrusions protruding toward the electrolyte inlet, and the guiding protrusions are provided with at least one guiding through hole.
[0005] In one embodiment, the flow guiding protrusion is arc-shaped and protrudes toward the electrolyte inlet.
[0006] In one embodiment, the guide protrusion has a uniform thickness in the arc length direction.
[0007] In one embodiment, the thickness of the guide protrusion is 1 mm to 5 mm.
[0008] In one embodiment, the central angle corresponding to the guide protrusion is 100 to 150 degrees.
[0009] In one embodiment, the radius of the guide protrusion is 40 mm to 60 mm.
[0010] In one embodiment, the flow guiding protrusion is provided with a plurality of flow guiding holes, which are evenly spaced apart.
[0011] In one embodiment, the flow-guiding protrusion is connected to the surface of the plate by welding.
[0012] In one embodiment, multiple rows of the flow-guiding protrusions are sequentially distributed on the plate in the distribution direction of the electrolyte inlet and the electrolysis product outlet.
[0013] In one embodiment, the guide protrusions in two adjacent rows are staggered.
[0014] In one embodiment, a gap is provided between each of the flow-guiding protrusions.
[0015] In one embodiment, the flow guiding protrusion has an upstream side facing the electrolyte inlet, and the upstream side of the flow guiding protrusion and the ends of adjacent rows of flow guiding protrusions are opposite to and spaced apart.
[0016] In one embodiment, the end of the flow guide protrusion is offset from the flow guide through hole on the opposite flow guide protrusion.
[0017] This application also proposes an electrolytic cell comprising two end plates and a plurality of the aforementioned electrode plates, wherein the plurality of electrode plates are disposed between two of the end plates and the two end plates are connected by a tie rod.
[0018] In this application's technical solution, the upstream surface of the guiding protrusion is shaped to bulge towards the electrolyte inlet. It can be conical or arc-shaped. The shape of the upstream surface of the guiding protrusion effectively guides the electrolyte to diffuse uniformly along the surface of the plate. The electrolyte can diffuse both along the first direction towards the electrolysis product outlet and at a certain angle to the first direction. Furthermore, the electrolyte can also diffuse through the guiding holes on the guiding protrusion and the gaps between the guiding protrusions, further improving the uniformity of electrolyte distribution on the plate surface. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the structure of an embodiment of the electrode plate provided in this application;
[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the electrode plate from another perspective;
[0022] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;
[0023] Figure 4 A cross-sectional structural schematic diagram of an embodiment of the flow guiding protrusion of the electrode plate provided in this application;
[0024] Figure 5 A schematic diagram of another embodiment of the electrode plate provided in this application;
[0025] Figure 6 A schematic diagram of another embodiment of the electrode plate provided in this application;
[0026] Figure 7 A schematic diagram of another embodiment of the electrode plate provided in this application;
[0027] Figure 8 This is a schematic diagram of the structure of an embodiment of the electrolytic cell provided in this application.
[0028] Explanation of icon numbers:
[0029] 100. Plate body;
[0030] 200, Electrode frame; 210, Electrolyte inlet; 220, Electrolysis product outlet;
[0031] 300, guide protrusion; 301, upstream side surface; 302, downstream side surface; 303, end; 310, guide through hole;
[0032] 10. Electrode plate; 20. End plate; 30. Pull rod.
[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0035] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0037] This application proposes an electrode plate.
[0038] Please see Figures 1 to 4 In one embodiment of this application, the electrode plate 10 includes a plate body 100 and an electrode frame 200 surrounding the plate body 100; wherein, the electrode frame 200 is provided with an electrolyte inlet 210 through which the electrolyte flows into the plate body and an electrolytic product outlet 220 opposite to the electrolyte inlet 210; the plate body 100 is provided with a plurality of flow guiding protrusions 300 protruding toward the electrolyte inlet 210, and the flow guiding protrusions 300 are provided with at least one flow guiding through hole 301.
[0039] Specifically, the electrolyte inlet 210 and the electrolysis product outlet 220 are distributed in the first direction, and can be directly opposite each other or at a certain angle. The guide protrusion 300 has an upstream side facing the electrolyte inlet 210 and a downstream side facing the electrolysis product outlet 220. The upstream and downstream sides are arranged opposite each other in the first direction. The electrolyte flows from the electrolyte inlet 210 to the plate 100 and diffuses on the surface of the plate 100 through the guidance of the guide protrusion 300. The electrolysis product containing gas flows into the electrolysis product outlet 220 through the guidance of the guide protrusion 300.
[0040] The guide protrusions can be arranged roughly towards the electrolyte inlet 210, and can be, for example, Figure 1 As shown, the protrusion directions of each guide protrusion 300 are exactly the same, or they can be, as... Figures 5 to 7 As shown, the protrusion directions of the various guide protrusions 300 are not exactly the same; furthermore, the sizes of the various guide protrusions 300 can be the same or different. Figure 1 , Figure 5 , Figure 6 This corresponds to an embodiment where each guide protrusion 300 is the same size. Figure 7This corresponds to embodiments with at least two guide protrusions 300 of different sizes.
[0041] In this application's technical solution, the upstream surface 301 of the flow-guiding protrusion 300 is shaped to bulge towards the electrolyte inlet 210. It can be conical or arc-shaped. The shape of the upstream surface 301 of the flow-guiding protrusion 300 effectively guides the electrolyte to diffuse uniformly along the surface of the plate 100. The electrolyte can diffuse both along the first direction towards the electrolysis product outlet 220 and along a direction at a certain angle to the first direction. Furthermore, the electrolyte can also diffuse through the flow-guiding through-holes 310 on the flow-guiding protrusion 300, further improving the uniformity of electrolyte distribution on the surface of the plate 100.
[0042] Furthermore, gaps are provided between each of the flow-guiding protrusions 300, so that the electrolyte can diffuse through the gaps between the flow-guiding protrusions 300, thereby further improving the uniformity of electrolyte distribution on the surface of the plate 100. Of course, in other embodiments, at least some of the adjacent flow-guiding protrusions 300 may abut against each other.
[0043] In this embodiment, please refer to the following: Figure 1 and Figure 2 The flow-guiding protrusion 300 is arc-shaped, protruding towards the electrolyte inlet 210. That is, the flow-guiding protrusion 300 is generally arc-shaped, with both its upstream surface 301 and downstream surface 302 being arc surfaces. This arc-shaped flow-guiding protrusion 300 can reduce the flow resistance of the electrolyte, minimize flow rate loss, and allow the electrolyte to flow more smoothly. Of course, in other embodiments, the flow-guiding protrusion 300 can also be conical, that is, it has two inclined surfaces connected at an included angle.
[0044] Further, in this embodiment, please refer to Figure 3 and Figure 4The guiding protrusion 300 has a uniform thickness along the arc length direction. The thickness of the guiding protrusion 300 is also the distance between its upstream surface 301 and downstream surface 302. In this embodiment, uniform thickness along the arc length direction means that for a cross-section obtained by cutting the guiding protrusion 300 along a direction parallel to the plate surface, the distance between its upstream surface 301 and downstream surface 302 is equal or approximately equal everywhere. This improves the structural consistency of the guiding protrusion 300 along the arc length direction, allowing it to exert a relatively consistent guiding effect on the electrolyte, i.e., to guide the electrolyte relatively uniformly, thereby further improving the uniformity of electrolyte distribution. Furthermore, the guide protrusion 300 can be configured to have a uniform thickness in the height direction. The height direction of the guide protrusion 300 is also the direction in which the guide protrusion 300 protrudes relative to the plate 100. That is, the thickness of the guide protrusion 300 is equal or approximately equal everywhere, thereby improving the overall structural consistency of the guide protrusion 300. In particular, the guide through holes 310 provided at various locations of the guide protrusion 300 can also have a consistent structure, thereby achieving a uniform flow guiding effect. Of course, in other embodiments, the thickness of the guide protrusion 300 can also be set to be non-uniform according to the flow guiding requirements.
[0045] In one embodiment, the thickness of the flow-guiding protrusion 300 is 1 mm to 5 mm. Specifically, the thickness of the flow-guiding protrusion 300 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. Within this range, the thickness of the flow-guiding protrusion 300 ensures its structural strength while preventing it from occupying the electrolyte flow area, thus avoiding the formation of dead zones. Of course, in other embodiments, the thickness of the flow-guiding protrusion 300 can also be less than 1 mm, such as 0.5 mm or 0.8 mm, or greater than 5 mm, such as 5.5 mm, 6 mm, 7 mm, or 8 mm.
[0046] In one implementation, please refer to Figure 4 The central angle θ corresponding to the flow-guiding protrusion 300 is between 100 and 150 degrees. This ensures that the arc length of the flow-guiding protrusion 300 is within a suitable range, which is beneficial for ensuring its guiding effect on the electrolyte. Specifically, the central angle θ corresponding to the flow-guiding protrusion 300 can be 100, 110, 120, 130, 140, or 150 degrees. Of course, the central angle θ corresponding to the flow-guiding protrusion 300 can also be less than 100 degrees, such as 80, 90, or 95 degrees, or greater than 150 degrees, such as 160 or 165 degrees.
[0047] In one implementation, please refer to Figure 4The radius R of the flow-guiding protrusion 300 is 40mm to 60mm. This allows the curvature of the flow-guiding protrusion 300 to be relatively gentle, thus providing good flow guidance in the direction forming a certain angle with the first direction, ensuring sufficient diffusion of the electrolyte in that direction. The radius R of the flow-guiding protrusion 300 can be 40mm, 45mm, 50mm, 55mm, 60mm, etc. Of course, the radius R of the flow-guiding protrusion 300 can also be less than 40mm, such as 25mm, 30mm, 35mm, etc., or greater than 60mm, such as 65mm, 70mm, 75mm, etc.
[0048] In particular, the combination of the central angle range and the radius range of the aforementioned guide protrusion 300 is more conducive to ensuring the guiding function of the guide protrusion 300.
[0049] In one implementation, please refer to Figure 3 and Figure 4 The flow-guiding protrusion 300 is provided with a plurality of flow-guiding through holes 310, which are evenly spaced. This allows multiple flow-guiding through holes 310 to allow electrolyte to pass through, thereby improving the flow-guiding capacity of the flow-guiding protrusion 300. Furthermore, when a sufficient number of flow-guiding through holes 310 are provided to allow electrolyte to pass through, such as 3-8 holes 310, so that the electrolyte flow in the first direction no longer excessively depends on the gaps between the flow-guiding protrusions 300, the flow-guiding protrusions 300 can be densely arranged. This strengthens the guiding effect of the flow-guiding protrusions 300 on the electrolyte, ensuring that the electrolyte can fully diffuse to the side areas of the electrode plate, which helps to avoid the formation of dead zones. Of course, in other embodiments, the flow-guiding protrusion 300 may also have only one flow-guiding through hole 310.
[0050] In one embodiment, both the electrode frame 200 and the flow-guiding protrusion 300 are disposed relative to the surface of the plate 100, and the protrusion height of the flow-guiding protrusion 300 relative to the plate surface is greater than the protrusion height of the electrode frame 200 relative to the plate surface. Thus, electrodes and diaphragms can be sequentially stacked on the side of the flow-guiding protrusion 300 facing away from the plate surface. The array of flow-guiding protrusions 300 provides support, ensuring stable installation of the related structures. Furthermore, the array of flow-guiding protrusions 300 provides sufficient contact area, minimizing damage to the related structures and ensuring the structural stability of the electrolytic cell. Therefore, the flow-guiding protrusion 300 integrates flow-guiding and support functions, simplifying the structure of the electrolytic cell. Of course, in other embodiments, the flow-guiding protrusion 300 can also cooperate with a support structure to support the electrodes and diaphragm.
[0051] In one implementation, please refer to Figure 1In the distribution direction of the electrolyte inlet 210 and the electrolysis product outlet 220, multiple rows of the flow-guiding protrusions 300 are sequentially distributed on the plate 100. These multiple rows of flow-guiding protrusions 300 are distributed sequentially in the aforementioned first direction, thereby enhancing the flow-guiding effect of the protrusions 300 on the electrolyte and improving the uniformity of electrolyte distribution on the surface of the plate 100. Of course, in other embodiments, the multiple flow-guiding protrusions 300 may also be as follows... Figures 5 to 7 The arrangement shown is as follows.
[0052] Further, please refer to Figure 1 The guide protrusions 300 in adjacent rows are staggered, so that they are arranged in a fish-scale pattern on the surface of the plate 100. This effectively guides the electrolyte to diffuse fully along the surface of the plate 100, thereby greatly improving the uniformity of electrolyte distribution on the surface of the plate 100 and reducing flow dead zones. Of course, in other embodiments, the guide protrusions 300 in adjacent rows can also be arranged in a vertical alignment according to the desired flow guiding effect.
[0053] Specifically, please refer to Figure 1 and Figure 2 When the electrode plate is circular or nearly circular, the number of the guide protrusions 300 in each row first increases and then decreases in the first direction. Thus, in the direction from the electrolyte inlet 210 to the electrolytic product outlet 220, the number of guide protrusions 300 in each row first increases, effectively diverting the electrolyte and ensuring uniform distribution of the electrolyte on the surface of the plate 100. As the number of guide protrusions 300 in each row decreases, the electrolytic products can still be collected through the guide protrusions 300, more efficiently guiding the electrolytic products to the electrolytic product outlet 220. This distribution pattern is well-suited for circular electrodes, ensuring the guide protrusions 300 are evenly distributed on the plate 100, further guaranteeing the uniformity of electrolyte distribution. Of course, when the electrode plate is configured in other shapes, such as polygons, the guide protrusions 300 can also be arranged in other ways.
[0054] In one implementation, please refer to Figure 3The upstream side of the guide protrusion 300 and the end 303 of the adjacent row of guide protrusions 300 are positioned opposite each other and spaced apart. This creates a gap between adjacent rows of guide protrusions 300, allowing electrolyte to flow through and ensuring efficient electrolyte flow. Furthermore, the electrolyte flowing to the end 303 of the guide protrusion 300 can more smoothly connect to the downstream guide protrusion 300 and continue to flow through the upstream surface 301 of the downstream guide protrusion 300, improving the smoothness of electrolyte flow and ensuring uniform electrolyte distribution. Alternatively, in other embodiments, the electrolyte can be guided downstream via the guide through hole 310, with adjacent rows of conductor protrusions abutting each other.
[0055] Further, please refer to Figure 3 The end 303 of the flow guiding protrusion 300 is offset from the flow guiding through hole 310 on the opposite flow guiding protrusion 300. That is, the end 303 of the flow guiding protrusion 300 is opposite to the solid region on the downstream adjacent row of flow guiding protrusions 300, but not opposite to the latter's flow guiding through hole 310. In this way, the electrolyte flowing to the end 303 of the flow guiding protrusion 300 can first contact the solid region of the upstream surface 301 of the downstream flow guiding protrusion 300, and thus be affected by the solid region. The electrolyte has a guiding effect, thus flowing downstream to the end 303 of the guide protrusion 300. During this process, when the electrolyte encounters the guide hole 310, some of it will pass through the guide hole 310, and some of the electrolyte will continue to flow to the end 303 under the guidance of the upstream side surface 301 of the corresponding guide protrusion 300. In this way, the guiding effect of the guide protrusion 300 on the electrolyte in the arrangement direction of a row of guide protrusions 300 can be enhanced, thereby ensuring the uniformity of electrolyte distribution on the surface of the plate 100.
[0056] In one embodiment, the flow guiding protrusions 300 on the side of a row of flow guiding protrusions 300 can abut against the inner peripheral surface of the electrode frame 200. In this way, the electrolyte is prevented from staying on the side of the plate 100. The flow guiding protrusions 300 can guide the electrolyte in conjunction with the inner peripheral surface of the electrode frame 200 so as to replenish the new electrolyte, thereby ensuring that the electrolysis reaction continues to proceed efficiently.
[0057] In one embodiment, the guide protrusion 300 is individually formed and then connected to the surface of the plate 100. Thus, the guide protrusions 300 can be configured with the same shape, mass-produced, and then assembled onto the surface of the plate 100. Specific tooling can be designed to facilitate the positioning and installation of the guide protrusions 300 and the plate 100. Alternatively, multiple individual guide protrusions 300 can be configured on the plate 100, or multiple guide protrusions 300 can be connected as a single unit and then connected to the plate 100. Specifically, the guide protrusions 300 are connected to the surface of the plate 100 by welding. Of course, in other embodiments, the guide protrusions 300 can also be integrally formed with the plate 100.
[0058] In one embodiment, the electrode plate is applied to an alkaline electrolytic cell, and the plate body 100, electrode frame 200, and flow guiding protrusion 300 are configured with an alkaline corrosion-resistant material, which may be nickel, nickel alloy, or carbon steel with an anti-corrosion coating. Of course, in other embodiments, when the electrode plate is applied to other types of electrolytic cells, the materials of the plate body 100, electrode frame 200, and flow guiding protrusion 300 can be adapted to other materials according to the operating environment.
[0059] This application also proposes an electrolytic cell comprising an electrode plate 10. The specific structure of the electrode plate 10 is as described in the above embodiments. Since this electrolytic cell adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Please refer to [link to relevant documentation]. Figure 8 The electrolytic cell includes two end plates 20 and a plurality of electrode plates 10 disposed between the two end plates 20, and the two end plates 20 are connected by a tie rod 30.
[0060] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.
Claims
1. An electrode plate, characterized in that, Includes a plate and a polar frame surrounding the plate; wherein, The electrode frame is provided with an electrolyte inlet through which the electrolyte flows into the plate and an electrolytic product outlet opposite to the electrolyte inlet. The plate is provided with a plurality of flow guiding protrusions protruding toward the electrolyte inlet, and each flow guiding protrusion is provided with at least one flow guiding hole.
2. The electrode plate as described in claim 1, characterized in that, The flow guide protrusion is arc-shaped and protrudes towards the electrolyte inlet.
3. The electrode plate as described in claim 2, characterized in that, The guide protrusion has a uniform thickness in the arc length direction.
4. The electrode plate as described in claim 3, characterized in that, The thickness of the guide protrusion is 1 mm to 5 mm.
5. The electrode plate as described in claim 2, characterized in that, The central angle corresponding to the flow guide protrusion is 100 to 150 degrees. And / or, the radius of the guide protrusion is 40mm to 60mm.
6. The electrode plate as described in claim 1, characterized in that, The flow guiding protrusion is provided with a plurality of flow guiding holes, which are evenly spaced apart.
7. The electrode plate as described in claim 1, characterized in that, The flow guide protrusion is connected to the surface of the plate by welding.
8. The electrode plate as described in claim 1, characterized in that, A gap is provided between each of the aforementioned guide protrusions.
9. The electrode plate according to any one of claims 1 to 8, characterized in that, In the distribution direction of the electrolyte inlet and the electrolysis product outlet, multiple rows of the flow guiding protrusions are sequentially distributed on the plate.
10. The electrode plate as described in claim 9, characterized in that, The guide protrusions in adjacent rows are staggered.
11. The electrode plate as described in claim 10, characterized in that, The flow guiding protrusion has an upstream side facing the electrolyte inlet, and the upstream side of the flow guiding protrusion and the ends of the adjacent row of flow guiding protrusions are opposite to and spaced apart.
12. The electrode plate as described in claim 11, characterized in that, The end of the flow guide protrusion is offset from the flow guide through hole on the opposite flow guide protrusion.
13. An electrolytic cell, characterized in that, It includes two end plates and a plurality of electrode plates as described in any one of claims 1 to 12, wherein the plurality of electrode plates are disposed between two end plates and the two end plates are connected by a tie rod.