Square alkaline electrolytic bath pole plate
By improving the design of the alkaline electrolytic cell electrode plates and employing brazing and etching processes, the problem of metal exposure around the manifold opening was solved, achieving efficient current utilization and temperature uniformity in the alkaline electrolytic cell, and improving current efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNGROW HYDROGEN SCI &TECH CO LTD
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-15
AI Technical Summary
In existing alkaline electrolytic cells, the metal around the manifold inlet is exposed to the alkaline solution, causing the current to pass directly through the alkaline solution to the electrode plate without participating in the electrolysis reaction, resulting in ineffective current and affecting current efficiency.
The design employs a square alkaline electrolytic cell electrode plate, using brazing to connect the ceramic thin plate frame and the flow channel plate into one piece. The extension height of the manifold section is greater than the height of the manifold opening, wrapping around the manifold opening. Combined with etching process, the flow channel is formed to ensure uniform flow of alkaline solution and heat transfer.
It improves insulation resistance, reduces bypass current, homogenizes the temperature in the reaction zone, and enhances current efficiency and the overall performance of the electrolyzer.
Smart Images
Figure CN224243221U_ABST
Abstract
Description
Technical Field
[0001] This utility model application relates to the field of alkaline electrolytic cell technology, specifically to a square alkaline electrolytic cell electrode plate. Background Technology
[0002] Electrode plates are a crucial component of alkaline electrolyzers, serving several functions: supporting the diaphragm and electrodes, separating and sealing gas and liquid phases, uniformly transporting and distributing reactants and products, collecting current and conducting electrons, conducting heat, and controlling the temperature uniformity of the reaction zone. Currently, in traditional electrolyzers, electrode plates are mostly circular in shape, using a stamped protrusion structure to form the flow channels. While this structure is relatively simple to form, it is not conducive to the flow of alkali and generated gases within the cavity, resulting in temperature deviations across the entire reaction area and affecting the reaction rate. In alkaline electrolyzers, bypass current is the most significant factor limiting the current efficiency. This is primarily because the metal around the manifold inlet is exposed to the alkali solution, causing current to flow directly into the electrode plate without participating in the electrolytic reaction, thus creating ineffective current. Utility Model Content
[0003] This utility model application provides a square alkaline electrolytic cell electrode plate, aiming to partially or completely solve the technical problem in the prior art where the metal around the manifold inlet is exposed to the alkaline solution, causing current to flow directly into the electrode plate through the alkaline solution at the manifold inlet without participating in the electrolysis reaction and forming ineffective current. To achieve the above objective, this utility model application provides the following technical solution:
[0004] A square alkaline electrolytic cell electrode plate includes: a first frame, a flow channel plate, and a second frame. The first frame and the second frame are disposed on both sides of the flow channel plate. The flow channel plate is provided with multiple manifold openings. The first frame, the second frame, and the flow channel plate are connected as a whole. Along the thickness direction of the electrode plate, the first frame is provided with multiple manifold sections. And / or, along the thickness direction of the electrode plate, the second frame 200 is provided with multiple manifold sections. The multiple manifold sections disposed on the first frame extend along the thickness direction of the electrode plate to contact a third frame. And / or, the multiple manifold sections disposed on the third frame extend along the thickness direction of the electrode plate to contact the first frame. The extension height of the manifold sections is greater than or equal to the height of the manifold openings.
[0005] Optionally, the first frame includes a central first through hole and a plurality of manifold holes, the number of manifold holes and manifold openings being equal, and the plurality of manifold holes being distributed on both sides of the first through hole.
[0006] Optionally, the multiple manifold ports include a first manifold port, a second manifold port, a third manifold port, and a fourth manifold port, and the multiple manifold holes include manifold hole one, manifold hole two, manifold hole three, and manifold hole four. Manifold hole one and manifold hole two are provided on one side of the first through hole, and manifold hole three and manifold hole four are provided on the other side of the first through hole.
[0007] Optionally, the first frame includes a first surface and a second surface opposite to each other along the thickness direction of the electrode plate. On the second surface, the first frame is provided with a first bridge area, a second bridge area, and a plurality of manifold sections. The plurality of manifold sections include a first manifold section and a second manifold section. The first bridge area is located at one manifold hole, the second bridge area is located at three manifold holes, the first manifold section is located at two manifold holes, and the second manifold section is located at four manifold holes.
[0008] Optionally, on the first side, a first annular protrusion, a second annular protrusion, and an edge annular protrusion are formed on the first frame. The first annular protrusion and the second annular protrusion form a first groove, and the second annular protrusion and the edge protrusion form a second groove. The plurality of protrusions are located in the first groove.
[0009] Optionally, the first frame and the second frame have the same structure; and / or, the first frame is a ceramic frame; and / or, the second frame is a ceramic frame; and / or, the flow channel plate is made of carbon steel; and / or, the first frame, the second frame, and the flow channel plate are brazed together as one unit.
[0010] Optionally, on the first side, a plurality of protrusions are also formed on the first frame, including protrusion one, protrusion two, protrusion three, and protrusion four. Protrusion one is located at one manifold hole, protrusion two is located at two manifold holes, protrusion three is located at three manifold holes, and protrusion four is located at four manifold holes.
[0011] Optionally, the protrusion is annular, and / or the manifold portion is annular.
[0012] Optionally, the first manifold section and the second manifold section are arranged diagonally, and the first bridge area and the second bridge area are arranged diagonally.
[0013] Optionally, the flow channel plate includes a flow channel area, which includes multiple flow channels. A first manifold port and a second manifold port are provided on one side of the flow channel area, and a third manifold port and a fourth manifold port are provided on the other side of the flow channel area. The flow channel area is connected to the first bridge area and the second bridge area.
[0014] In summary, this utility model application has the following beneficial technical effects:
[0015] In this utility model application, the flow channel is formed by etching process, which can uniformly guide the alkaline solution and the generated gas, uniformly transfer the heat in the reaction area, and homogenize the temperature distribution of the reaction area. At the same time, the brazing process and ceramic thin plate frame structure are introduced to wrap and insulate the manifold opening, improve the insulation resistance, reduce the bypass current, and improve the current efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a square alkaline electrolytic cell electrode plate according to this utility model application. Figure 1;
[0017] Figure 2 This is a structural schematic diagram of the second side of the first frame of this utility model application;
[0018] Figure 3 This is a structural schematic diagram of the first side of the first frame of this utility model application;
[0019] Figure 4 This is a partial structural diagram of a square alkaline electrolytic cell electrode plate according to this utility model application. Figure 2 ; Detailed Implementation
[0020] In the following description, numerous specific details are set forth to provide a more thorough understanding of this utility model application. However, it will be apparent to those skilled in the art that this utility model application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this utility model application.
[0021] like Figures 1 to 4 As shown, a square alkaline electrolytic cell electrode plate includes: a first frame 100, a flow channel plate 300, and a second frame 200. The first frame 100 and the second frame 200 are arranged on both sides of the flow channel plate 300. The flow channel plate 300 is provided with multiple manifold openings. The first frame 100, the second frame 200, and the flow channel plate 300 are connected as a whole. Along the electrode plate thickness direction, the first frame 100 is provided with multiple manifold sections. And / or, along the electrode plate thickness direction, the second frame 200 is provided with multiple manifold sections. The multiple manifold sections arranged on the first frame 100 extend along the electrode plate thickness direction to contact the second frame 200. And / or, the multiple manifold sections arranged on the second frame 200 extend along the electrode plate thickness direction to contact the first frame 100. The extension height of the manifold sections is greater than or equal to the height of the manifold openings.
[0022] In some embodiments, a first frame 100 and a second frame 200 are provided on both sides of the flow channel plate 300. The first frame 100 and the second frame 200 are at least partially or completely attached to the flow channel plate 300, which can ensure the airtightness and insulation performance of the electrode plates among the three as much as possible. The first frame 100, the second frame 200 and the flow channel plate 300 are connected as a whole. For example, the first frame 100, the second frame 200 and the flow channel plate 200 can be welded together by a brazing process, and the brazing process material is a nickel-based adhesive.
[0023] In some embodiments, and / or, the first frame, the second frame, and the flow channel plate are brazed together to form a whole. The first frame 100 and the second frame 200 are made of ceramic thin plates. The ceramic thin plates are made of insulating and alkali-resistant ceramics such as zirconium oxide. The flow channel plate 200 is made of carbon steel. The first frame 100 and the second frame 200 can be formed by machining or die stamping processes. This utility model application does not impose any special restrictions on this.
[0024] In some embodiments, a plurality of manifold portions are provided on the first frame 100 along the electrode thickness direction. The plurality of manifold portions provided on the first frame 100 extend along the electrode thickness direction to contact the second frame 200. The extension height of the manifold portions along the electrode thickness direction is greater than or equal to the height of the manifold opening.
[0025] In some embodiments, a plurality of manifold portions are provided on the second frame 200 along the electrode thickness direction. The plurality of manifold portions provided on the second frame 200 extend along the electrode thickness direction to contact the first frame 100. The extension height of the manifold portions along the electrode thickness direction is greater than or equal to the height of the manifold opening.
[0026] In some embodiments, a plurality of manifold portions are provided on the first frame 100 and the second frame 200 along the electrode thickness direction. The plurality of manifold portions provided on the first frame 100 extend along the electrode thickness direction to contact the second frame 200, and the plurality of manifold portions provided on the second frame 200 extend along the electrode thickness direction to contact the first frame 100. The extension height of the manifold portions along the electrode thickness direction is greater than or equal to the height of the manifold opening.
[0027] In this utility model application, the first frame 100 and the second frame 200 are at least partially or completely attached to the flow channel plate 300. Along the thickness direction of the electrode plate, the extension height of the manifold is greater than or equal to the height of the manifold opening. The alkaline solution has little or no contact with the multiple manifold openings of the flow channel plate 300, which reduces the generation of bypass current and greatly improves the current efficiency of the square alkaline electrolytic cell.
[0028] Optionally, the first frame 100 includes a central first through hole 105 and a plurality of manifold holes, the number of manifold holes and manifold openings being equal, and the plurality of manifold holes being distributed on both sides of the first through hole 105.
[0029] In some embodiments, the first frame 100 is provided with a central first through hole 105, the number of manifold holes and manifold openings are equal, the positions of the manifold holes and manifold openings correspond, and multiple manifold holes can be distributed on both sides of the first through hole 105.
[0030] Optionally, the multiple manifold ports include a first manifold port 301, a second manifold port 302, a third manifold port 303, and a fourth manifold port 304, and the multiple manifold holes include a first manifold hole 101, a second manifold hole 102, a third manifold hole 103, and a fourth manifold hole 104. The first manifold hole 101 and the second manifold hole 102 are provided on one side of the first through hole 105, and the third manifold hole 103 and the fourth manifold hole 104 are provided on the other side of the first through hole 105.
[0031] In some embodiments, manifold hole one 101, manifold hole two 102, manifold hole four 104, and manifold hole three 103 may be symmetrically or asymmetrically distributed. For example, manifold hole one 101, manifold hole two 102, manifold hole three 103, and manifold hole four 104 are symmetrically distributed on both sides of the first through hole 105.
[0032] In this utility model application, the number of manifold holes and manifold openings are equal and their positions correspond to ensure that the electrolyte can flow into the flow channel plate evenly. The symmetrically distributed manifold holes (such as manifold hole one 101, manifold hole two 102, manifold hole three 103, and manifold hole four 104) improve the uniformity of fluid distribution.
[0033] Optionally, the first frame 100 includes a first surface and a second surface opposite to each other along the thickness direction of the electrode plate. On the second surface, the first frame 100 is provided with a first bridging area 1061, a second bridging area 1062, and a plurality of manifolds. The plurality of manifolds include a first manifold 1071 and a second manifold 1072. The first bridging area 1061 is located at manifold hole one 101, the second bridging area 1062 is located at manifold hole three 101, the first manifold 1071 is located at manifold hole two 102, and the second manifold 1072 is located at manifold hole four 104.
[0034] In this utility model application, the first bridging area 1061 is located at manifold orifice 101, and the second bridging area 1062 is located at manifold orifice 103. The electrolyte can flow into the flow channel plate from the first bridging area 1061 and the second bridging area 1062. The flow path of the electrolyte is controlled. The alkaline solution has little or no contact with the multiple manifold orifices of the flow channel plate 300, reducing the generation of bypass current and improving the overall current efficiency.
[0035] Optionally, on the first side, a first annular protrusion 2061, a second annular protrusion 2062, and an edge annular protrusion 2063 are formed on the first frame 100. The first annular protrusion 2061 and the second annular protrusion 2062 form a first groove 2064, and the second annular protrusion 2062 and the edge protrusion 2063 form a second groove 2065. The plurality of protrusions are located in the first groove 2064.
[0036] In this utility model application, the arrangement of the first annular protrusion 2061, the second annular protrusion 2062 and the edge annular protrusion 2063 forms multiple sealed environments, ensuring the stability and safety of the internal environment of the electrolytic cell. At the same time, the combined design of multiple annular protrusions and grooves also increases the mechanical strength of the first frame 100.
[0037] Optionally, the first frame 100 and the second frame 200 have the same structure. On the first side, the first frame 100 also has a plurality of protrusions, including protrusion 1 201, protrusion 202, protrusion 3 203 and protrusion 4 204. Protrusion 1 201 is located at manifold hole 101, protrusion 2 is located at manifold hole 2 102, protrusion 3 203 is located at manifold hole 3 103, and protrusion 204 is located at manifold hole 4 104.
[0038] In some embodiments, the first frame 100 and the second frame 200 have the same structure, that is, the second frame 200 includes a first surface and a second surface opposite to each other along the thickness direction of the electrode plate. On the second surface, the first frame 100 is provided with a first bridging region 1061, a second bridging region 1062, and a plurality of manifold sections. The plurality of manifold sections include a first manifold section 1071 and a second manifold section 1072. The first bridging region 1061 is located at manifold hole one 101, and the second bridging region 1062 is located at manifold hole three 101. 1071 is located at manifold hole 2 102, and the second manifold portion 1072 is located at manifold hole 4 104; on the first side, a plurality of protrusions are also formed on the first frame 100, including protrusion 1 201, protrusion 202, protrusion 3 203, and protrusion 4 204. Protrusion 1 201 is located at manifold hole 1 101, protrusion 2 is located at manifold hole 2 102, protrusion 3 203 is located at manifold hole 3 103, and protrusion 204 is located at manifold hole 4 104.
[0039] In this utility model application, firstly, the first frame 100 and the second frame 200 have identical structures, and this symmetrical design simplifies the manufacturing process. The number of molds and processing steps is reduced, thereby lowering manufacturing costs. Since the frame structures are identical, they are interchangeable during assembly. The standardized design reduces maintenance difficulty and costs, and assembly personnel do not need to distinguish between different frames, reducing the risk of incorrect assembly while improving assembly efficiency and flexibility. In addition, multiple protrusions form close contact with adjacent components (such as flow channel plates) during assembly, providing additional structural support. This support ensures that the electrolyzer remains stable under high pressure or high temperature environments. The arrangement of the bridge area and manifold can guide the electrolyte to flow in the electrolyzer along a predetermined path, reducing the generation of bypass current and improving the overall efficiency of the electrolyzer.
[0040] Optionally, the protrusion is annular; and / or, the manifold portion is annular.
[0041] In this utility model application, the annular protrusion can provide uniform support distribution with the sealing material, and the annular manifold part forms a closed sealing structure around the fluid channel, which can annularly cover the manifold opening, so that the alkaline solution has little or no contact with the multiple manifold openings of the flow channel plate 300, thereby reducing the generation of bypass current.
[0042] Optionally, the first manifold section 1071 and the second manifold section 1072 are arranged diagonally, and the first bridge area 1061 and the second bridge area 1062 are arranged diagonally.
[0043] In this utility model application, the diagonally arranged manifold and bridge area can guide the fluid to flow diagonally in the electrolytic cell. The diagonal arrangement makes the structure of the electrolytic cell more symmetrical. The symmetrical design simplifies the manufacturing process and makes the mold and processing procedures more standardized.
[0044] Optionally, the flow channel plate includes a flow channel area 305, which includes multiple flow channels. A first manifold port 301 and a second manifold port 302 are provided on one side of the flow channel area 305, and a third manifold port 303 and a fourth manifold port 304 are provided on the other side of the flow channel area 305. The flow channel area 305 is connected to the first bridge area 1061 and the second bridge area 1062.
[0045] In this utility model application, the manifold ports are located on both sides of the flow channel area, supporting bidirectional flow of fluid and reducing the residence time of fluid in the flow channel area. The flow channel area 305 can be formed by etching process. The flow channel can guide the alkaline solution and the generated gas, and transfer the heat in the reaction area. The uniform distribution of multiple flow channels can homogenize the temperature distribution in the reaction area and improve the efficiency of electrolysis reaction.
[0046] The working method of the square alkali tank electrode plate of this utility model application is as follows:
[0047] First, the second side of the first frame 100 is tightly fitted to one side of the flow channel plate 300, and the second side of the second frame 200 is tightly fitted to the other side of the flow channel plate 300. Along the thickness direction of the electrode plate, the second side of the first frame 100 is provided with multiple manifolds (e.g., two first manifolds 1071 and two second manifolds 1072), and the second side of the second frame 200 is also provided with multiple manifolds (e.g., two first manifolds 1071 and two second manifolds 1072). The multiple manifolds (e.g., two first manifolds 1071 and two second manifolds 1072) on the second side of the first frame 100 extend along the thickness direction of the electrode plate to contact the second frame 200, and the multiple manifolds on the second frame 200 extend along the thickness direction of the electrode plate to contact the first frame 100. Along the thickness direction of the electrode plate, the extension height of the manifolds is greater than or equal to the height of the manifold opening. In this way, the multiple manifolds of the first frame 100 and the second frame 200 can wrap and insulate the multiple manifold openings of the flow channel plate 300, thereby improving the insulation resistance.
[0048] Then, when the alkaline solution passes through multiple manifold openings (e.g., first manifold opening 301, second manifold opening 302, third manifold opening 302, fourth manifold opening 304), it flows into multiple channels of the flow channel region 305 of the flow channel plate 300 after passing through the first bridge region 1061 and / or the second bridge region 1062. Because the extension height of multiple manifold sections (e.g., two first manifold sections 1071, two second manifold sections 1072) is greater than or equal to that of the manifold openings (e.g., first manifold opening 301, second manifold opening 302, third manifold opening 304), At the height of manifold 302 and fourth manifold 304, at the positions of multiple manifolds (e.g., first manifold 301, second manifold 302, third manifold 302, and fourth manifold 304) of the flow channel plate 300, the alkaline solution has little or no contact with the multiple manifolds (e.g., first manifold 301, second manifold 302, third manifold 302, and fourth manifold 304) of the flow channel plate 300, reducing the generation of bypass current and greatly improving the current efficiency of electrolysis in the square alkaline electrolytic cell.
[0049] As stated above, although this utility model application has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the utility model application itself. Various changes in form and detail may be made to this utility model application without departing from the spirit and scope of the appended claims as defined.
Claims
1. A square alkaline electrolytic cell electrode plate, comprising: A first frame, a flow channel plate, and a second frame are provided on both sides of the flow channel plate. The flow channel plate is provided with multiple manifold openings. The first frame, the second frame, and the flow channel plate are connected as a whole. The feature is that, along the electrode plate thickness direction, the first frame is provided with multiple manifold sections; and / or, along the electrode plate thickness direction, the second frame is provided with multiple manifold sections; the multiple manifold sections provided on the first frame extend along the electrode plate thickness direction to contact the third frame, and / or, the multiple manifold sections provided on the third frame extend along the electrode plate thickness direction to contact the first frame, and the extension height of the manifold sections is greater than or equal to the height of the manifold openings.
2. The square alkaline electrolytic cell electrode plate according to claim 1, characterized in that, The first frame includes a central first through hole and multiple manifold holes, with the number of manifold holes and manifold openings being equal, and the multiple manifold holes being distributed on both sides of the first through hole.
3. The square alkaline electrolytic cell electrode plate according to claim 2, characterized in that, The multiple manifold ports include a first manifold port, a second manifold port, a third manifold port, and a fourth manifold port. The multiple manifold holes include manifold hole one, manifold hole two, manifold hole three, and manifold hole four. Manifold hole one and manifold hole two are provided on one side of the first through hole, and manifold hole three and manifold hole four are provided on the other side of the first through hole.
4. The square alkaline electrolytic cell electrode plate according to claim 3, characterized in that, The first frame includes a first surface and a second surface that are opposite each other along the thickness direction of the electrode plate. On the second surface, the first frame is provided with a first bridge area, a second bridge area, and multiple manifold sections. The multiple manifold sections include a first manifold section and a second manifold section. The first bridge area is located at one manifold hole, the second bridge area is located at three manifold holes, the first manifold section is located at two manifold holes, and the second manifold section is located at four manifold holes.
5. A square alkaline electrolytic cell electrode plate according to claim 3, characterized in that, On the first side, a first annular protrusion, a second annular protrusion, and an edge annular protrusion are formed on the first frame. The first annular protrusion and the second annular protrusion form a first groove, and the second annular protrusion and the edge protrusion form a second groove. The plurality of protrusions are located in the first groove.
6. A square alkaline electrolytic cell electrode plate according to claim 5, characterized in that, The first and second borders have the same structure; and / or, the first border is a ceramic border; and / or, the second border is a ceramic border; and / or, the flow channel plate is made of carbon steel. ； And / or, the first frame, the second frame, and the flow channel plate are brazed together to form a single unit.
7. A square alkaline electrolytic cell electrode plate according to claim 5, characterized in that, On the first side, a plurality of protrusions are formed on the first frame, including protrusion one, protrusion two, protrusion three, and protrusion four. Protrusion one is located at one manifold hole, protrusion two is located at two manifold holes, protrusion three is located at three manifold holes, and protrusion four is located at four manifold holes.
8. A square alkaline electrolytic cell electrode plate according to claim 6, characterized in that, The protrusion is annular, and / or the manifold portion is annular.
9. A square alkaline electrolytic cell electrode plate according to claim 4, characterized in that, The first manifold section and the second manifold section are arranged diagonally, as are the first bridge area and the second bridge area.
10. A square alkaline electrolytic cell electrode plate according to claim 4, characterized in that, The flow channel plate includes a flow channel area, which includes multiple flow channels. A first manifold port and a second manifold port are provided on one side of the flow channel area, and a third manifold port and a fourth manifold port are provided on the other side of the flow channel area. The flow channel area is connected to the first bridge area and the second bridge area.