A polar frame, electrolytic cell and electrolytic tank

Abstract

The application discloses an electrode frame, an electrolysis cell and an electrolysis tank. The electrode frame comprises an electrode frame body and a first sealing ring. The electrode frame body has opposite anode and cathode sides. A hollow part is arranged in the middle of the electrode frame body and penetrates the anode and cathode sides. At least one side surface of the electrode frame body is concave around the periphery of the hollow part to form a step surface for embedding a membrane electrode assembly. A material through hole is arranged around the periphery of the step surface. The first sealing ring is arranged around the periphery of the hollow part and located on the step surface. The membrane electrode assembly comprises a second sealing ring, which is arranged correspondingly to the first sealing ring. The application is widely applied in the technical field of electrolysis tanks.

Description

Technical Field

[0001] This application relates to the field of electrolytic cell technology, and in particular to an electrode frame, an electrolytic chamber, and an electrolytic cell. Background Technology

[0002] An electrolyzer is a device that converts electrical energy into chemical energy based on electrochemistry. By applying electricity to the device, water is electrolyzed into hydrogen and oxygen, converting electrical energy into chemical energy stored in the hydrogen, thus achieving energy conversion. Currently, electrolyzers employ a multi-layered stacked electrolysis chamber design. The electrode frames are a crucial component of the electrolysis chamber, typically numbering two: one as the anode frame and the other as the cathode frame. Due to the separate design of the two electrode frames, two sets of molds are required during manufacturing, resulting in higher manufacturing costs and a more complex assembly process. Furthermore, to ensure effective sealing and assembly of the electrolysis chamber, related technologies usually set the dimensions of the membrane electrode assembly (MEA) to match the dimensions of the electrode frames, leading to low utilization of the MEA and difficulty in reducing manufacturing costs. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an integrated design of the electrode frame, electrolysis chamber, and electrolytic cell, which integrates the anode and cathode electrode frames to reduce manufacturing costs and simplify the assembly process.

[0004] The pole frame according to the first aspect embodiment of this application includes:

[0005] The electrode frame body has an opposing anode side and a cathode side. A hollow portion is provided in the middle of the electrode frame body, penetrating through the anode side and the cathode side. At least one side surface of the electrode frame body is recessed around the periphery of the hollow portion to form a stepped surface that can be built into the membrane electrode assembly. A material passage hole is provided around the periphery of the stepped surface of the electrode frame body.

[0006] A first sealing ring is disposed around the outer periphery of the hollow portion and located on the stepped surface. The first sealing ring is used to press against the second sealing ring of the membrane electrode assembly.

[0007] The electrode frame according to the embodiments of this application has at least the following beneficial effects: By providing a hollow portion penetrating the anode and cathode sides in the hollow portion of the electrode frame body, and forming a stepped surface around the periphery of the hollow portion on at least one side surface of the electrode frame body for housing the membrane electrode assembly, a first sealing ring is provided around the outer periphery of the hollow portion on the stepped surface for pressing with a second sealing ring on the membrane electrode assembly to achieve effective sealing of the membrane electrode, the interior of the electrode frame is divided into two reaction chambers, cathode and anode, thereby meeting the design requirements of integrated cathode and anode electrode frames, reducing the number of electrode frame bodies and sealing components, so that only one mold is needed during the processing of the electrode frame, which helps to save mold development costs and material costs, thereby reducing manufacturing costs. At the same time, it can also reduce assembly steps, simplify the assembly process, facilitate the assembly of the electrolytic cell, and improve production efficiency. In addition, the material through hole is provided around the periphery of the stepped surface, that is, the material through hole is provided on the outer periphery of the membrane electrode, which helps to reduce the size of the membrane electrode, improve the utilization rate of the membrane electrode, and further reduce manufacturing costs.

[0008] According to some embodiments of this application, the electrode frame further includes an anode sealing ring and a cathode sealing ring. The anode side includes an anode inlet, an anode inlet distribution area, an anode outlet distribution area, and an anode outlet arranged sequentially along a first direction. The hollow portion is located between the anode inlet distribution area and the anode outlet distribution area. The anode sealing ring is disposed on the anode side. The anode inlet, the anode inlet distribution area, the anode outlet distribution area, and the anode outlet are located inside the anode sealing ring.

[0009] The cathode side includes a cathode inlet, a cathode inlet distribution area, a cathode outlet distribution area, and a cathode outlet arranged sequentially along the second direction. The hollow portion is located between the cathode inlet distribution area and the cathode outlet distribution area. The cathode sealing ring is disposed on the cathode side, and the cathode inlet, the cathode inlet distribution area, the cathode outlet distribution area, and the cathode outlet are located inside the cathode sealing ring.

[0010] According to some embodiments of this application, the electrode frame body is provided with a leakage groove on the outer periphery of the anode sealing ring and the cathode sealing ring, and the leakage groove is used to introduce a leak detection liquid to detect gas leaks.

[0011] According to some embodiments of this application, the electrode frame further includes a sealing gasket disposed between the electrode frame body and the membrane electrode assembly, and the sealing gasket is located on the outer periphery of the anode sealing ring and the cathode sealing ring.

[0012] According to some embodiments of this application, the first sealing ring is disposed on the anode side.

[0013] According to some embodiments of this application, both the first sealing ring and the second sealing ring include a plurality of spaced sealing lines, each of which is wound into a ring.

[0014] According to some embodiments of this application, the stepped surface and the first sealing ring are provided with an adhesive layer.

[0015] An electrolysis chamber according to a second aspect of this application includes a membrane electrode assembly and an electrode frame as described in the first aspect above. The membrane electrode assembly includes a second sealing ring, which is disposed corresponding to the first sealing ring.

[0016] The electrolysis chamber according to the embodiments of this application has at least the following beneficial effects: the anode and cathode frames are integrated into a single design to reduce manufacturing costs and simplify the assembly process.

[0017] According to some embodiments of this application, the membrane electrode assembly includes a cathode layer assembly, a membrane electrode, a membrane cover plate, and an anode layer assembly arranged in sequence. The membrane electrode is attached to the stepped surface and located on the anode side. The second sealing ring is disposed on the membrane cover plate, and the membrane cover plate is disposed on the side of the membrane electrode away from the stepped surface.

[0018] An electrolytic cell according to a third aspect of this application includes an electrolytic chamber as described in the second aspect above.

[0019] The electrolysis chamber according to the embodiments of this application has at least the following beneficial effects: the anode and cathode frames are integrated into a single design to reduce manufacturing costs and simplify the assembly process.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the electrolysis chamber disclosed in the embodiments of this application;

[0023] Figure 2 This is a front view of the electrolysis chamber disclosed in the embodiments of this application;

[0024] Figure 3 This is a schematic AA cross-sectional view of the electrolysis chamber disclosed in the embodiments of this application;

[0025] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0026] Figure 5This is an exploded view of the electrolysis chamber disclosed in an embodiment of this application.

[0027] Figure 6 This is an exploded view of the electrolysis chamber disclosed in an embodiment of this application from another perspective;

[0028] Figure 7 This is a schematic diagram of the polar frame disclosed in an embodiment of this application from one viewpoint.

[0029] Figure 8 This is a schematic diagram of the polar frame disclosed in an embodiment of this application from another perspective.

[0030] Figure label:

[0031] 100. Electrolysis chamber;

[0032] 10. Electrode frame; 11. Electrode frame body; 110. Hollowed-out portion; 111. Anode side; 1110. First stepped surface; 1111. Anode inlet; 1112. Anode inlet distribution area; 1113. Anode outlet distribution area; 1114. Anode outlet; 112. Cathode side; 1120. Second stepped surface; 1121. Cathode inlet; 1122. Cathode inlet distribution area; 1123. Cathode outlet distribution area; 1124. Cathode outlet; 12. First sealing ring; 13. First anode sub-sealing ring; 14. Second anode sub-sealing ring; 15. First cathode sub-sealing ring; 16. Second cathode sub-sealing ring; 17. Leakage groove;

[0033] 20. Membrane electrode assembly; 21. Second sealing ring; 22. Membrane electrode; 23. Membrane cover plate; 230. Positioning hole; 24. Cathode microporous layer; 25. Cathode diffusion layer; 26. Anode microporous layer; 27. Anode diffusion layer. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In the description of this application, the use of terms such as "as one implementation," "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] This application discloses an electrode frame that can be applied to an electrolysis chamber to support and fix the membrane electrode. The electrolysis chamber can be applied to an electrolyzer to produce hydrogen by electrolysis of water.

[0040] To facilitate understanding of the structure of the electrode frame, electrolytic chamber, and electrolytic cell, the following will provide further explanation of the electrode frame, electrolytic chamber, and electrolytic cell in conjunction with embodiments and accompanying drawings.

[0041] The contents of this application are described in detail below with reference to specific embodiments. It should be noted that the following description is merely illustrative and not a specific limitation of this application.

[0042] Please refer to the following: Figures 1 to 6 This application provides an electrolysis chamber 100, including an electrode frame 10 and a membrane electrode assembly 20. Please refer to... Figure 7 and Figure 8 The electrode frame 10 includes an electrode frame body 11 and a first sealing ring 12. The electrode frame body 11 has an anode side 111 and a cathode side 112. A hollow portion 110 is provided in the middle of the electrode frame body 11, passing through the anode side 111 and the cathode side 112. At least one side surface of the electrode frame body 11 is recessed around the periphery of the hollow portion 110 to form a stepped surface that can be built into the membrane electrode assembly 20. A material passage hole is provided around the periphery of the stepped surface of the electrode frame body 11. The first sealing ring 12 is disposed around the outer periphery of the hollow portion 110 and located on the stepped surface. The membrane electrode assembly 20 includes a second sealing ring 21, which is disposed correspondingly to the first sealing ring 12.

[0043] The electrode frame 10 and electrolytic chamber 100 provided in this application embodiment are formed by providing a hollow portion 110 through the anode side 111 and the cathode side 112 in the hollow portion of the electrode frame body 11, and forming a stepped surface around the periphery of the hollow portion 110 on at least one side surface of the electrode frame body 11 for housing the membrane electrode assembly 20. A first sealing ring 12 is provided around the outer periphery of the hollow portion 110 on the stepped surface for pressing with a second sealing ring 21 on the membrane electrode assembly 20 to effectively seal the membrane electrode 20. The electrode frame 10 is divided into two reaction chambers, a cathode and an anode, thereby meeting the design requirements of the integrated cathode electrode frame and anode electrode frame, reducing the number of electrode frame bodies 11 and sealing components, so that only one mold is needed during the processing of the electrode frame 10, which helps to save mold development costs and material costs, thereby reducing manufacturing costs. At the same time, it can also reduce assembly steps, simplify the assembly process, facilitate the assembly of the electrolytic cell, and improve production efficiency. Furthermore, since the electrode frame 10 provided in this application embodiment integrates the cathode electrode frame and the anode electrode frame into one piece, compared with the electrolytic cell 100 that uses two electrode frames 10 in related technologies, on the one hand, the thickness of a single electrode frame 10 can be increased, which is beneficial to improving the stability of the electrode frame 10 under high pressure conditions, so as to overcome the problem that the electrode frame 10 is prone to failure under high pressure operation. On the other hand, it can also reduce the overall thickness of the electrode frame 10 and reduce the overall material used of the electrode frame 10, so as to save costs.

[0044] In addition, material through holes are arranged around the periphery of the stepped surface, that is, the material through holes are arranged on the outer periphery of the membrane electrode 20 and the membrane electrode 20 is embedded in the middle of the electrode frame 10. This helps to reduce the size of the membrane electrode 20, so that the size of the membrane electrode 20 does not need to be consistent with the electrode frame body 11, thereby improving the utilization rate of the membrane electrode 20 and further reducing the manufacturing cost.

[0045] Please combine Figure 5 and Figure 6 In some embodiments, the membrane electrode assembly 20 includes a cathode layer assembly, a membrane electrode 20, a membrane cover plate 23, and an anode layer assembly arranged in sequence. The membrane electrode 20 is attached to the step surface and located on the anode side 111. A second sealing ring 21 is disposed on the membrane cover plate 23, which is disposed on the side of the membrane electrode 20 away from the step surface.

[0046] In this way, the stepped surface of the electrode frame body 11 and the membrane cover plate 23 support and position the two sides of the membrane electrode 20, so that the membrane electrode 20 is fixed on the electrode frame body 11. This not only achieves the sealing of the membrane electrode 20, so that the two sides of the membrane electrode 20 form an anode reaction chamber and a cathode reaction chamber respectively, but also helps to reduce the size of the membrane electrode 20, improve the utilization rate of the membrane electrode 20, and further reduce the manufacturing cost.

[0047] Please combine Figure 7 and Figure 8 Optionally, considering that the electrolytic cell mainly uses anode liquid inlet, the anode side 111 of the electrode frame body 11 is recessed around the periphery of the hollow portion 110 to form a first stepped surface 1110, and the first sealing ring 12 is disposed on the first stepped surface 1110 and located on the anode side 111. This allows the membrane electrode 20 to be located on the anode side 111 of the electrode frame body 11, which helps to ensure the structural stability of the electrolysis chamber 100 during liquid inlet.

[0048] Optionally, the cathode side 112 of the electrode frame body 11 is recessed around the periphery of the hollow portion 110 to form a second stepped surface 1120. The cathode layer assembly includes a cathode microporous layer 24 and a cathode diffusion layer 25. The cathode microporous layer 24 is installed in the hollow portion 110, and the cathode diffusion layer 25 is disposed on the side of the cathode microporous layer 24 away from the membrane electrode 20 and located on the cathode side 112. A positioning hole 230 is provided through the middle of the membrane cover plate 23. The anode layer assembly includes an anode microporous layer 26 and an anode diffusion layer 27. The anode microporous layer 26 is installed in the positioning hole 230, and the anode diffusion layer 27 is disposed on the side of the anode microporous layer 26 away from the membrane electrode 20.

[0049] This approach facilitates efficient use of space and improves structural compactness, thereby reducing the volume of the electrolysis chamber 100. It also improves the sealing design of the electrolysis chamber 100, reducing the thickness and number of sealing components. Furthermore, integrating the membrane electrode 20, cathode diffusion layer 25, and anode diffusion layer 27 within the electrode frame 10 allows for modular design of the electrolysis chamber 100, reducing the number of positioning components and improving the assembly efficiency of the electrolytic cell. This facilitates modular replacement during subsequent maintenance, reduces positioning and maintenance difficulty, and ultimately improves the maintenance efficiency of the electrolytic cell.

[0050] Optionally, the thickness of the anode microporous layer 26 is greater than or equal to the thickness of the membrane cover plate 23, so as to facilitate the positioning of the anode layer assembly by the membrane cover plate 23.

[0051] Optionally, after the anode diffusion layer 27 is installed on the first step surface 1110, the side of the anode diffusion layer 27 away from the membrane electrode 20 protrudes relative to the anode side 111. This helps to ensure close contact between the structures within the electrolytic cell, improves the structural stability of the electrolytic cell, reduces the number of positioning components, and improves assembly efficiency.

[0052] Optionally, the thickness of the cathode microporous layer 24 is greater than or equal to the distance between the first step surface 1110 and the second step surface 1120, that is, the thickness of the cathode microporous layer 24 is greater than or equal to the wall height of the hollow portion 110, so as to facilitate the positioning of the cathode microporous layer 24 by the electrode frame body 11.

[0053] Optionally, the thickness of the cathode diffusion layer 25 is greater than or equal to the recessed depth of the second step surface 1120, that is, after the cathode diffusion layer 25 is installed on the second step surface 1120, the side of the cathode diffusion layer 25 away from the membrane electrode 20 protrudes relative to the cathode side 112. This helps to ensure close contact of the structures within the electrolytic cell, improves the structural stability of the electrolytic cell, reduces the number of positioning components, and improves assembly efficiency.

[0054] In some embodiments, the membrane electrode 20 is coated with a catalyst at the position corresponding to the hollow portion 110, that is, the membrane electrode 20 is not coated with a catalyst at the position corresponding to the first step surface 1110. This ensures the area of ​​the effective region (the region coated with catalyst) of the membrane electrode 20 to ensure the reaction rate, while reducing the waste of catalyst in the useless region, thereby improving the utilization rate of the membrane electrode 20 and further reducing the cost.

[0055] Optionally, considering that the membrane electrode 20 is susceptible to swelling due to temperature and humidity during use in the electrolysis chamber 100, leading to inaccurate positioning and increased assembly difficulty during repeated disassembly and reassembly, an adhesive layer is provided between the first step surface 1110 and the first sealing ring 12. The adhesive layer bonds and fixes the membrane electrode 20 to the electrode frame body 11, facilitating a stable connection between the membrane electrode 20 and the electrode frame body 11. This prevents the membrane electrode 20 from becoming unpositionable due to swelling during later maintenance of the electrolytic cell, thus affecting its reusability. Furthermore, since the membrane electrode 20 in this embodiment is embedded in the middle of the electrode frame 10, it facilitates stable positioning and minimizes the impact on the membrane electrode 20 during repeated disassembly and reassembly, thus avoiding positioning failure and performance degradation caused by membrane electrode 20 swelling.

[0056] Optionally, the adhesive layer can be any of the following: adhesive glue, double-sided tape, or adhesive material. The specific type can be set according to actual needs, and there are no restrictions here.

[0057] In some embodiments, the electrode frame 10 further includes an anode sealing ring and a cathode sealing ring. The anode side 111 includes an anode inlet 1111, an anode inlet distribution area 1112, an anode outlet distribution area 1113, and an anode outlet 1114 arranged sequentially along a first direction. The hollow portion 110 is located between the anode inlet distribution area 1112 and the anode outlet distribution area 1113. The anode sealing ring is disposed on the anode side 111, and the anode inlet 1111, the anode inlet distribution area 1112, the anode outlet distribution area 1113, and the anode outlet 1114 are located inside the anode sealing ring. The cathode side 112 includes a cathode inlet 1121, a cathode inlet distribution area 1122, a cathode outlet distribution area 1123, and a cathode outlet 1124 arranged sequentially along the second direction. The hollow portion 110 is located between the cathode inlet distribution area 1122 and the cathode outlet distribution area 1123. A cathode sealing ring is disposed on the cathode side 112, and the cathode inlet 1121, the cathode inlet distribution area 1122, the cathode outlet distribution area 1123, and the cathode outlet 1124 are located inside the cathode sealing ring.

[0058] In this way, by sealing the gas and liquid inlet and outlet with the anode sealing ring and the cathode sealing ring, the airtightness of the reaction chamber can be ensured and gas leakage can be avoided.

[0059] Optionally, in an AEM (Anion Exchange Membrane) electrolyzer, both the cathode and anode need to be fed with liquid simultaneously, with the anode being the primary feeder. Therefore, the uniformity of the liquid distribution on the anode side 111 needs to be carefully considered. Based on this, for example, when the electrode frame 10 is a cuboid, the first direction is the width direction of the electrode frame 10, and the second direction is the length direction of the electrode frame 10. This allows the anode side 111 to feed liquid from the short side of the electrode frame 10, and the cathode side 112 to feed liquid from the long side of the electrode frame 10. This shortens the flow path of the electrolyte, reduces the pressure drop of the electrolyte, and facilitates the faster discharge of generated gas, thereby improving the electrolysis efficiency of the electrolyzer.

[0060] Optionally, the anode sealing ring includes a first anode sub-sealing ring 13 and a second anode sub-sealing ring 14, and the cathode sealing ring includes a first cathode sub-sealing ring 15 and a second cathode sub-sealing ring 16. The anode inlet 1111, anode inlet distribution area 1112, anode outlet distribution area 1113, and anode outlet 1114 on the anode side 111 are located within the first anode sub-sealing ring 13. The cathode inlet 1121 and cathode outlet 1124, penetrating the anode side 111, are located within the second anode sub-sealing ring 14. The cathode inlet 1121, cathode inlet distribution area 1122, cathode outlet distribution area 1123, and cathode outlet 1124 on the cathode side 112 are located within the first cathode sub-sealing ring 15. The anode inlet 1111 and anode outlet 1114, penetrating the cathode side 112, are located within the second cathode sub-sealing ring 16. This ensures the sealing effect of the gas and liquid inlets and outlets, improves the sealing performance of the reaction chamber, and prevents gas leakage.

[0061] Optionally, the first sealing ring 12, the second sealing ring 21, the first anode sealing ring 13, the second anode sealing ring 14, the first cathode sealing ring 15, and the second cathode sealing ring 16 each include multiple spaced sealing lines, with each sealing line forming a ring. The arrangement of multiple spaced sealing lines in the sealing rings increases the number of sealing nodes and improves the sealing effect. Furthermore, compared to a fixed-size sealing ring, the ring shape allows for adjustment of the inner diameter of the sealing ring, making it suitable for the sealing requirements of components of different sizes and facilitating the assembly of the electrolysis chamber 100.

[0062] Understandably, in other embodiments, the first sealing ring 12, the second sealing ring 21, the first anode sealing ring 13, the second anode sealing ring 14, the first cathode sealing ring 15, and the second cathode sealing ring 16 may also be a single sealing line or a single sealing ring, etc.

[0063] Optionally, the electrode frame 10 also includes a sealing gasket, which is disposed between the electrode frame body 11 and the membrane electrode assembly 20, and the sealing gasket is located on the outer periphery of the anode sealing ring and the cathode sealing ring.

[0064] In this way, since the sealing ring is raised on the surface of the electrode frame body 11, after the sealing ring is pressed and assembled, the anode sealing ring, cathode sealing ring and sealing gasket can work together to achieve sealing by embedding the sealing gasket, so as to form a stable and reliable sealing structure, which is beneficial to improving the sealing effect of the electrolysis chamber 100.

[0065] For example, the anode layer assembly includes an anode bipolar plate located on the anode side 111 and abutting against an anode sealing ring, and the cathode layer assembly includes a cathode bipolar plate located on the cathode side 112 and abutting against a cathode sealing ring. The number of sealing rings is at least two, wherein at least one sealing gasket is located between the anode side 111 of the electrode frame body 11 and the anode bipolar plate, and wherein at least another sealing gasket is located between the cathode side 112 of the electrode frame body 11 and the cathode bipolar plate.

[0066] Optionally, to ensure sealing performance and the strength of the sealing line, the width of the sealing line is less than or equal to 1 mm, for example, the width can be 1.0 mm, 0.8 mm, 0.6 mm, 0.5 mm or 0.4 mm, etc., and the height of the sealing line is less than or equal to 0.1 mm, for example, the height can be 0.10 mm, 0.08 mm, 0.06 mm or 0.05 mm, etc., and the thickness of the sealing gasket matches the height of the sealing line, thereby achieving an effective seal within 6 MPa.

[0067] In some embodiments, considering that the AEM electrolytic cell is composed of multiple electrolytic chambers 100 stacked together, any leakage in any electrolytic chamber 100 will affect the operational stability of the electrolytic cell. Currently, there is a lack of effective monitoring of leakage in the electrolytic chambers 100. When one of the electrolytic chambers 100 leaks, it is impossible to quickly and accurately locate the leak point, which poses a certain maintenance difficulty. Based on this, the electrode frame body 11 is provided with a leakage groove 17 on the outer periphery of the anode sealing ring and the cathode sealing ring. The leakage groove 17 is used to introduce leak detection liquid to detect gas leak points.

[0068] By setting a leakage groove 17 in the electrode frame body 11 and introducing a leak detection liquid into the leakage groove 17, when the sealing ring fails and a leak occurs, the gas will escape from the electrolytic cell through the leakage groove 17. When the leak detection liquid passes through the gas leak point, the flow trajectory of the leak detection liquid changes under the action of the gas, or the leak detection liquid reacts with the gas to generate bubbles. At this time, the presence of a leak point can be determined based on the bubbles or the flow traces of the leak detection liquid, thereby enabling rapid location of the leak point area, timely maintenance, improved repair speed, and ensuring the operational reliability of the electrolytic cell.

[0069] Optionally, the leakage groove 17 can be located between the first anode sub-sealing ring 13 and the second anode sub-sealing ring 14, or between the first cathode sub-sealing ring 15 and the second cathode sub-sealing ring 16. This allows for simultaneous detection of the sealing effect of both sub-sealing rings, which is beneficial for testing the reliability of the anode and cathode sealing rings and quickly locating the leakage point.

[0070] To facilitate reading and understanding, the assembly process of the electrolysis chamber 100 is illustrated below with a simple example:

[0071] First, facing the anode side 111 of the electrode frame body 11, the membrane electrode 20 is attached to the first stepped surface 1110. Then, using the first sealing ring 12 as a positioning reference, the membrane cover plate 23 is pressed onto the side of the membrane electrode 20 away from the membrane electrode 20. Next, the anode microporous layer 26 is installed in the positioning hole 230 of the membrane cover plate 23. Then, using the inner wall of the first stepped surface 1110 as a positioning reference, the anode diffusion layer 27 is attached to the side of the anode microporous layer 26 away from the membrane electrode 20. At this time, the anode diffusion layer 27 protrudes relative to the anode side 111 surface of the electrode frame body 11 to help ensure close contact inside the electrolytic cell. After the anode layer assembly is installed, the cathode layer assembly is installed. First, the cathode microporous layer 24 is installed on the hollow part 110 of the electrode frame body 11. At this time, the cathode microporous layer 24 protrudes relative to the second step surface 1120 of the electrode frame body 11. Then, with the inner wall of the second step surface 1120 as the positioning reference, the cathode diffusion layer 25 is attached to the side of the cathode microporous layer 24 away from the membrane electrode 20. At this time, the cathode diffusion layer 25 protrudes relative to the cathode side 112 surface of the electrode frame body 11.

[0072] In this way, the electrolysis chamber 100 can form a stable whole after assembly, which facilitates modular assembly, reduces the number of positioning parts, and thus improves assembly efficiency. This effectively solves the problem of high assembly positioning and maintenance difficulty of the AEM electrolysis cell in the current multi-layer electrolysis chamber 100.

[0073] This application also provides an electrolytic cell (not shown), including the electrolytic chamber 100 as described in the above embodiments.

[0074] It is understood that since the electrolytic cell includes the electrolytic chamber 100 described in the above embodiments, the electrolytic cell has the beneficial effects of the electrolytic chamber 100 described in the above embodiments, which will not be repeated here.

[0075] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A polar frame, characterized in that, include: The electrode frame body has an opposing anode side and a cathode side. A hollow portion is provided in the middle of the electrode frame body, penetrating through the anode side and the cathode side. At least one side surface of the electrode frame body is recessed around the periphery of the hollow portion to form a stepped surface that can be built into the membrane electrode assembly. A material passage hole is provided around the periphery of the stepped surface of the electrode frame body. A first sealing ring is disposed around the outer periphery of the hollow portion and located on the stepped surface. The first sealing ring is used to press against the second sealing ring of the membrane electrode assembly.

2. The pole frame according to claim 1, characterized in that, The electrode frame further includes an anode sealing ring and a cathode sealing ring. The anode side includes an anode inlet, an anode inlet distribution area, an anode outlet distribution area, and an anode outlet arranged sequentially along a first direction. The hollow portion is located between the anode inlet distribution area and the anode outlet distribution area. The anode sealing ring is disposed on the anode side. The anode inlet, the anode inlet distribution area, the anode outlet distribution area, and the anode outlet are located inside the anode sealing ring. The cathode side includes a cathode inlet, a cathode inlet distribution area, a cathode outlet distribution area, and a cathode outlet arranged sequentially along the second direction. The hollow portion is located between the cathode inlet distribution area and the cathode outlet distribution area. The cathode sealing ring is disposed on the cathode side, and the cathode inlet, the cathode inlet distribution area, the cathode outlet distribution area, and the cathode outlet are located inside the cathode sealing ring.

3. The pole frame according to claim 2, characterized in that, The electrode frame body has a leakage groove on the outer periphery of the anode sealing ring and the cathode sealing ring. The leakage groove is used to introduce leak detection liquid to detect gas leaks.

4. The pole frame according to claim 2, characterized in that, The electrode frame also includes a sealing gasket, which is disposed between the electrode frame body and the membrane electrode assembly, and the sealing gasket is located on the outer periphery of the anode sealing ring and the cathode sealing ring.

5. The pole frame according to claim 1, characterized in that, The first sealing ring is disposed on the anode side.

6. The pole frame according to claim 1, characterized in that, Both the first sealing ring and the second sealing ring include a plurality of spaced sealing lines, and each of the sealing lines is wound into a ring.

7. The pole frame according to any one of claims 1-6, characterized in that, The stepped surface is provided with an adhesive layer to the first sealing ring.

8. An electrolysis chamber, characterized in that, The device includes a membrane electrode assembly and an electrode frame as described in any one of claims 1-7, wherein the membrane electrode assembly includes a second sealing ring, the second sealing ring being disposed corresponding to the first sealing ring.

9. The electrolysis chamber according to claim 8, characterized in that, The membrane electrode assembly includes a cathode layer assembly, a membrane electrode, a membrane cover plate, and an anode layer assembly arranged in sequence. The membrane electrode is attached to the stepped surface and located on the anode side. The second sealing ring is disposed on the membrane cover plate, which is located on the side of the membrane electrode away from the stepped surface.

10. An electrolytic cell, characterized in that, Includes the electrolysis chamber as described in claim 8.

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