Pole frame assembly and pole plate

Abstract

The application discloses a polar frame assembly and a polar plate, relates to the technical field of hydrogen production, and comprises a frame body and an insulation assembly. The frame body is provided with a flow channel opening. A flow channel groove is arranged in the inner ring of the frame body, and the flow channel opening and the flow channel groove are in communication. The insulation assembly comprises an insulation sleeve and a sealing element. The insulation sleeve is embedded in the flow channel opening. The insulation sleeve is provided with a flow channel part. The flow channel part is in communication with the flow channel groove. The sealing element is arranged around the outer periphery of the insulation sleeve and between the insulation sleeve and the flow channel opening. The insulation sleeve is embedded in the flow channel opening. The flow channel part is formed through the insulation sleeve. Without changing the original flow channel path, the electrolyte or the electrolyte-containing gas discharged is prevented from directly contacting the flow channel opening of the polar frame assembly or the part close to the flow channel opening, so that the polar frame assembly is prevented from being corroded, and the risk of leakage is further reduced.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology, and in particular to an electrode frame assembly and an electrode plate. Background Technology

[0002] In the operation of water electrolysis hydrogen production equipment, flow channels are designed into the electrode frame assembly. Some flow channels facilitate the discharge of gas-liquid mixtures such as hydrogen and alkali or oxygen and alkali, while others facilitate the inlet and outlet of alkali and the transfer of electrolyte. However, these gas-liquid mixtures and electrolytes are corrosive and can easily damage the flow channels of the electrode frame assembly under long-term alternating loads, even affecting the lifespan of the electrolyzer.

[0003] Although the relevant technologies provide some protection for the flow channel, the protection effect is not good.

[0004] Therefore, there is an urgent need for a solution that can effectively protect the flow channels of the polar frame assembly. Utility Model Content

[0005] The main objective of this application is to propose an electrode frame assembly and electrode plate, which aims to solve the technical problem of difficulty in effectively protecting the flow channel of the electrode frame assembly.

[0006] On the one hand, a polar frame component is provided, including: A frame, wherein a flow channel opening is provided on the frame, and a flow channel groove is formed in the inner ring of the frame, and the flow channel opening is connected to the flow channel groove; An insulating component includes an insulating sleeve and a seal, wherein the insulating sleeve is embedded in the flow channel opening and has a flow channel portion that communicates with the flow channel groove; The sealing element is disposed around the outer periphery of the insulating sleeve and between the insulating sleeve and the flow channel opening.

[0007] In one embodiment, the outer peripheral surface of the insulating sleeve forms a draft surface, and a gap is formed between the draft surface and the flow channel opening, with the seal filling the gap.

[0008] In one embodiment, the bottom surface of the insulating sleeve contacts the bottom of the channel opening, and the contour of the insulating sleeve from the bottom surface to the top surface is gradually widening to form the draft surface.

[0009] In one embodiment, the draft surface includes a first draft surface and a second draft surface; The bottom surface of the insulating sleeve contacts the bottom of the channel opening, and the outline of the insulating sleeve gradually expands from the bottom surface to the middle to form the first draft surface. The insulating sleeve has a tapered profile from the middle to the top surface to form the second draft surface; The first draft surface and the second draft surface are connected at the maximum outer periphery of the insulating sleeve.

[0010] In one embodiment, the insulating sleeve includes an integrally formed base plate and a skirt; The skirt is provided around at least a portion of the base plate to form the flow channel portion on the upper surface of the base plate.

[0011] In one embodiment, a first positioning part is provided on the outside of the insulating sleeve, and a second positioning part is provided on the groove wall of the flow channel opening, wherein the first positioning part and the second positioning part are engaged and adapted to each other.

[0012] In one embodiment, the first positioning portion is a continuous ring shape arranged around the skirt edge.

[0013] In one embodiment, the first positioning portion includes a plurality of connecting segments discontinuously distributed along the skirt edge.

[0014] In one embodiment, the insulating sleeve is provided with at least one first positioning portion from the bottom surface to the top surface.

[0015] On the other hand, an electrode plate is provided, including a main electrode plate and an electrode frame assembly as described above; The electrode frame assembly is arranged around the main electrode plate, and the flow channel groove is in communication with the surface of the main electrode plate.

[0016] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects: The insulating component includes an insulating sleeve and a seal. The insulating sleeve is embedded in the flow channel opening and has a flow channel portion that communicates with the flow channel groove. By constructing the flow channel portion through the insulating sleeve, the stable realization of the gas-liquid discharge and electrolyte transfer functions can be ensured to a certain extent. It can also prevent electrolyte, gas-liquid mixtures, etc. from directly contacting the flow channel opening or the part near the flow channel opening of the electrode frame component, thus preventing corrosion of the electrode frame component. In this way, the risk of leakage of electrolyte, gas-liquid mixtures, etc. can also be reduced. The sealing element is arranged around the outer periphery of the insulating sleeve and is located between the insulating sleeve and the flow channel opening. By adding the sealing element around the outer periphery of the insulating sleeve, the insulating sleeve is further fixed and the gap between the insulating sleeve and the flow channel opening is sealed, which improves the convenience of installation and the reliability of the overall structure, further optimizes the anti-leakage effect, and reduces the probability of corrosion of the flow channel groove or near the flow channel groove and flow channel opening caused by leakage of electrolyte, gas-liquid mixture, etc. This solves the technical problem of effectively protecting the flow channel of the electrode frame assembly, and thus ensures the long-term stable operation of the electrolytic cell to a certain extent. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of a structure of an embodiment of the electrode frame assembly of this application applied to the electrode plate; Figure 2 This is a partial structural schematic diagram of an embodiment of the insulating component of this application; Figure 3 This is a cross-sectional view of another embodiment of the insulating component of this application; Figure 4 This is a schematic diagram of an embodiment where the insulating sleeve does not have a sealing element; Figure 5 This is a schematic diagram illustrating yet another embodiment of the insulating component of this application; Figure 6 This is a schematic diagram of an embodiment of the electrolysis unit provided in this application.

[0019] Explanation of icon numbers: 10. Electrode plates; 100. Frame; 110. Flow channel inlet; 120. Flow channel groove; 131. First outlet flow channel; 132. First inlet flow channel; 133. Second outlet flow channel; 134. Second inlet flow channel; 200. Insulating component; 210. Insulating sleeve; 2101. Draft face; 2102a. First draft face; 2102b. Second draft face; 211. Base plate; 212. Skirt; 2121. Skirt body; 2122. Hemmed edge; 220. Seal; 230. Flow channel; 231. Flow groove; 232. Manifold; 300, gap; 410. First positioning unit; 420. Second positioning unit; 500, Main electrode plate; 21. Anode plate; 22. Positive electrode; 23. Diaphragm; 24. Negative electrode; 25. Cathode plate.

[0020] 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

[0021] 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.

[0022] 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.

[0023] 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.

[0024] In the operation of water electrolysis hydrogen production equipment, flow channels are designed into the electrode frame assembly of the electrode plates. Some flow channels facilitate the discharge of gas-liquid mixtures such as hydrogen and alkali solution or oxygen and alkali solution, while others facilitate the inlet and outlet of alkali solution and the transfer of electrolyte. However, these gas-liquid mixtures and the electrolyte are corrosive. Under long-term alternating loads, especially with high electrical density applications, galvanic corrosion and erosion corrosion occur around these channels, leading to damage to the carbon steel body and shortening the lifespan of the electrolyzer. Currently, the industry is driven by policy and funding to enter an era of large-scale, high-electrical-density production. Simultaneously, due to cost reduction and efficiency improvement, the number of chambers is constantly decreasing, while the hydrogen production per chamber is continuously increasing. This results in increasingly severe galvanic corrosion and erosion corrosion of the flow channels. Although related technologies provide some protection for the flow channels, the protective effect is not ideal.

[0025] In order to achieve effective protection of the flow channel of the pole frame assembly, embodiments of this application propose a pole frame assembly and pole plate 10.

[0026] like Figure 1 , Figure 2, Figure 3 As shown, the pole frame assembly includes a frame 100 and an insulating assembly 200. The frame 100 has a flow channel opening 110, and a flow channel groove 120 is formed in the inner ring of the frame 100, with the flow channel opening 110 communicating with the flow channel groove 120. The insulating assembly 200 includes an insulating sleeve 210 and a sealing element 220. The insulating sleeve 210 is embedded in the flow channel opening 110, and a flow channel portion 230 is provided on the insulating sleeve 210, communicating with the flow channel groove 120. The sealing element 220 is disposed around the outer periphery of the insulating sleeve 210 and between the insulating sleeve 210 and the flow channel opening 110.

[0027] Understandably, the electrode frame assembly can be applied to the electrode plate 10, which includes a main electrode plate 500 for participating in electrochemical reactions. The electrode frame assembly can be fitted onto the main electrode plate 500 and arranged around it; or the electrode frame assembly can be integrally formed with the main electrode plate 500 and arranged around it.

[0028] The flow channel groove 120 is connected to the corresponding flow channel opening 110. When the electrode frame assembly is applied to the electrode plate 10 and arranged around the main electrode plate 500, the flow channel groove 120 is used to connect the main electrode plate 500 and the corresponding flow channel opening 110, that is, the flow channel opening 110 can be connected to the main electrode plate 500 through the corresponding flow channel groove 120. The flow channel opening 110 is used for the installation of the insulation component 200. The insulation sleeve 210 of the insulation component 200 is embedded in the flow channel opening 110. The insulation sleeve 210 is made of PSU (polysulfone resin), PPS (polyphenylene sulfide), PEEK (polyether ether ketone), or other materials with corrosion resistance, high temperature resistance and insulation properties. A flow channel 230 is constructed through an insulating sleeve 210. This flow channel 230 communicates with the flow channel groove 120 on the electrode frame assembly. Without changing the original flow path, it can ensure the stable realization of gas-liquid discharge and electrolyte delivery functions to a certain extent, and can prevent electrolyte, gas-liquid mixture, etc. from directly contacting the flow channel opening 110 of the electrode frame assembly or the part near the flow channel opening 110, thus preventing corrosion of the electrode frame assembly. In this way, it can also reduce the risk of leakage of electrolytes such as alkali and gas-liquid mixtures. The flow channel 230 can be used for, but is not limited to: conveying electrolytes such as alkali to the main electrode plate 500 as a liquid inlet, discharging electrolytes such as alkali as a liquid outlet, and collecting and discharging gases generated during the electrolysis process (such as oxygen at the anode and hydrogen at the cathode) as a gas outlet. The liquid inlet and liquid outlet can be combined or set independently. If a leak occurs, electrolytes, gas-liquid mixtures, and other media can easily seep into the gap 300 between the insulating sleeve 210 and the flow channel 110. By adding a sealing element 220 around the outer periphery of the insulating sleeve 210, the insulating sleeve 210 is further fixed and the gap 300 between the insulating sleeve 210 and the flow channel 110 is sealed, which improves the ease of installation and the reliability of the overall structure, further optimizes the leak prevention effect, and reduces the probability of corrosion of the electrode frame assembly flow channel groove 120 or the position near the flow channel groove 120 and the flow channel 110 due to leakage of electrolytes such as alkaline solutions and gas-liquid mixtures. This solves the technical problem of effectively protecting the flow channel of the electrode frame assembly, and thus ensures the long-term stable operation of the electrolytic cell to a certain extent.

[0029] For example, to avoid deformation of the flow channel, the insulating sleeve 210 is generally made of a material with sufficient strength and good stability. However, the insulating sleeve 210 may age over long-term use. Therefore, a material with certain elasticity, corrosion resistance, high temperature resistance, and insulation properties is selected to make the sealing element 220, such as FKM (fluororubber) or other corrosion-resistant insulating elastic materials. This sealing element 220 forms a sealing boundary on the outside of the insulating sleeve 210. The sealing element 220 is high temperature resistant, compressible, and has a high resilience rate, which can effectively compensate for the gaps left after the insulating sleeve 210 is assembled, achieving the purpose of isolating the gaps, thereby avoiding the occurrence of gap corrosion and solving the problem of the pole frame assembly being difficult to effectively protect.

[0030] The embodiments of this application, after testing, show that compared with the original electrode frame assembly without insulation component 200, the scouring and electrochemical corrosion of the flow channel by the alkaline solution is significantly reduced, the body of the flow channel and the nickel plating layer are well protected, and the life of the electrolytic cell is greatly improved when the electrode frame assembly is used in the electrolytic cell.

[0031] In the embodiments of this application, a flow channel 230 is constructed by an insulating sleeve 210. The constructed flow channel 230 may include one, two or more other flow channels. When multiple flow channels are provided, the multiple flow channels may be set relatively independently or connected to each other; the specific configuration can be based on actual conditions and is not limited here.

[0032] like Figure 2 As shown, in one embodiment, the flow channel 230 includes a flow groove 231 and a flow confluence cavity 232. One end of the flow groove 231 is connected to the flow confluence cavity 232, and the other end is connected to the flow channel groove 120.

[0033] The flow channel section 230 includes a flow groove section 231 and a flow collection cavity 232. One end of the flow groove section 231 is connected to the flow collection cavity 232, and the other end is connected to the flow channel groove 120. The flow groove section 231 includes at least one flow channel, which serves to guide the flow and reduce the accumulation of gas-liquid mixture or alkaline solution in the flow channel groove 120. The flow collection cavity 232 serves to collect the flow and buffer the flow rate of the medium, reducing wear and corrosion of the pole frame assembly caused by scouring. The flow channel 120 includes at least a gas outlet and a liquid outlet. There are multiple flow channel sections 230. When the flow channel section 230 is used as a gas outlet, the flow channel section 231 is configured as at least one gas flow channel, and the manifold 232 is configured as a gas outlet chamber. The gas flow channel is connected to the gas outlet. The gas flow channel is used to collect the gas generated during the electrolysis process (such as oxygen at the anode and hydrogen at the cathode), so that the gas can be gathered into the gas outlet chamber and discharged smoothly, thereby reducing gas retention and achieving pressure control of the electrolysis unit to a certain extent. When the flow channel section 230 is used as a liquid inlet, the flow channel section 231 is configured as at least one liquid inlet flow channel, and the liquid inlet flow channel is connected to the liquid inlet. The manifold 232 is configured as a liquid inlet chamber. The liquid inlet chamber is used to uniformly distribute the electrolyte. The liquid inlet flow channel further transmits the electrolyte to each reaction area on the surface of the main electrode plate 500. The liquid inlet chamber and the liquid inlet flow channel provide sufficient electrolyte for the electrolysis reaction and achieve uniform distribution of the electrolyte.

[0034] It should be noted that the insulating sleeve 210 can be configured as a circle, a long waist hole, a circle, a long waist groove circle, or a large arc waist groove semicircle, etc., which are regular and irregular shapes, and are not limited here.

[0035] like Figure 1As shown, in one embodiment, there are multiple flow channels 120 and multiple flow ports 110. Each flow channel 120 includes a liquid inlet and a gas outlet, which are arranged opposite to each other. A portion of the multiple flow ports 110 is connected to the liquid inlet, and the other portions of the multiple flow ports 110 are connected to the gas outlet.

[0036] For example, the electrode plate 10 can be any one of a circle, rectangle, or ellipse. When the electrode plate 10 is circular, the positions of the liquid inlet and the gas outlet are symmetrical about the circle; when the electrode plate 10 is rectangular, the positions of the liquid inlet and the gas outlet are located on the same diagonal line; the specific configuration can be determined according to actual conditions and is not limited here.

[0037] The relative placement of the inlet and outlet allows for more uniform electrolyte flow, reducing the problem of excessively fast or slow local electrolyte flow and improving the efficiency of the electrolysis reaction and current efficiency. It also promotes the rapid discharge of gases (hydrogen, oxygen, etc.) generated during the reaction, reducing potential safety hazards caused by excessively high local gas concentrations.

[0038] In the embodiments of this application, the number of flow channels 230 in the pole frame assembly is multiple, with some of the multiple flow channels 230 configured as air outlets and others as liquid inlets. The number of air outlets is one or more, and the number of air outlets can also be one or more. When multiple air outlets are provided, at least one air outlet channel of each air outlet is connected to a corresponding air outlet, and multiple insulating components 200 are correspondingly provided. The multiple insulating components 200 are arranged one-to-one with the multiple air outlets to improve gas collection efficiency. By reasonably arranging the positions of multiple air outlets and multiple air outlets according to actual needs, exhaust efficiency can be improved, and corrosion caused by poor exhaust can be further resolved.

[0039] The number of liquid inlets can be one or more, and the number of liquid inlet sections can also be one or more. When multiple liquid inlet sections are provided, at least one liquid inlet channel of each liquid inlet section is connected to the corresponding liquid inlet, and multiple insulating components 200 are correspondingly provided. The multiple insulating components 200 are arranged one-to-one with the multiple liquid inlet sections to improve the conveying efficiency of the electrolytic cell, thereby improving the electrolytic reaction efficiency. According to actual needs, by reasonably arranging the positions of multiple liquid inlets and multiple liquid inlet sections, uniform liquid feeding can be further achieved, and the uneven flow field distribution can be improved.

[0040] like Figure 4 , Figure 5 As shown, in one embodiment, the outer peripheral surface of the insulating sleeve 210 forms a draft surface 2101, and a gap 300 is formed between the draft surface 2101 and the flow channel 110, and the seal 220 fills the gap 300.

[0041] To facilitate the smooth removal of the insulating sleeve 210 from the mold and prevent damage to its integrity during demolding, a draft surface 2101 is designed on the outer periphery of the insulating sleeve 210. However, the draft surface 2101 causes a gap 300 to form between the outer periphery of the insulating sleeve 210 and the groove wall of the flow channel 110 when the insulating sleeve 210 mates with the frame 100. During long-term operation of the water electrolysis hydrogen production equipment, the gap will cause crevice corrosion due to the accumulation of concentrated alkali. By wrapping a layer of soft rubber or similar material around the outer surface of the insulating sleeve 210 as a sealing element 220, the gap can be effectively filled when the insulating sleeve 210 is assembled with the frame 100 plate, compensating for the crevice corrosion problem caused by the draft angle of the single mold, thus balancing the convenience of demolding and the sealing and corrosion resistance under subsequent operating conditions.

[0042] like Figure 1 , Figure 5 As shown, the flow channel portion 230 of the insulating sleeve 210 communicates with the flow channel groove 120. The sealing member 220 can be provided to completely cover the outer peripheral surface of the insulating sleeve 210 to fully fill the gap 300; or, the sealing member 220 can be provided to cover a portion of the outer periphery of the insulating sleeve 210, and a clearance area is formed at the position where the flow channel portion 230 of the insulating sleeve 210 communicates with the flow channel groove 120. In addition, when the side of the insulating sleeve 210 that contacts the bottom of the groove of the flow channel opening 110 is defined as the bottom surface of the insulating sleeve 210, the insulating sleeve 210 can have one sealing member 220 or multiple sealing members 220 spaced apart in the first direction D1 from the bottom surface to the top surface. Specifically, a sealing element 220 can be set according to the actual draft surface 2101 formed by the insulating sleeve 210, so that when assembling the insulating assembly 200, the sealing element 220 can fill the gap 300 between the draft surface 2101 of the insulating sleeve 210 and the flow channel 110, thereby achieving effective protection of the pole frame assembly. The specific setting can be based on actual conditions and is not limited here.

[0043] like Figure 4 As shown, in one embodiment, the bottom surface of the insulating sleeve 210 contacts the bottom of the channel opening 110, and the outline of the insulating sleeve 210 from the bottom surface to the top surface is gradually expanding to form a draft surface 2101.

[0044] The unidirectional, gradually expanding draft surface 2101 can reduce the adhesion between the insulating sleeve 210 and the mold during demolding by adjusting the draft angle, thereby reducing the risk of demolding cracking and optimizing production and processing convenience. However, the unidirectional, gradually expanding structure can easily lead to a relatively large bottom gap 300, allowing media to easily seep in from the gap 300 between the bottom surface and the flow channel 110, affecting the sealing components (…). Figure 4 (Not shown) can be placed on the outer periphery of the insulating sleeve 210 near the bottom surface to effectively block leakage from the bottom gap 300 and, to a certain extent, prevent the medium from contacting the frame 100 and causing corrosion and leakage problems.

[0045] like Figure 3As shown, in another embodiment, the draft surface 2101 includes a first draft surface 2102a and a second draft surface 2102b. The bottom surface of the insulating sleeve 210 contacts the bottom of the channel opening 110. The outline of the insulating sleeve 210 gradually expands from the bottom surface to the middle to form the first draft surface 2102a. The outline of the insulating sleeve 210 gradually narrows from the middle to the top surface to form the second draft surface 2102b. The first draft surface 2102a and the second draft surface 2102b are connected at the maximum outer periphery of the insulating sleeve 210.

[0046] The first draft surface 2102a and the second draft surface 2102b are connected at the maximum outer periphery of the insulating sleeve 210, forming a structure with a large outer periphery in the middle and small outer peripheries at both ends. Because the middle outer periphery is the largest, the gap 300 between it and the groove wall of the flow channel 110 is relatively small, while the gap 300 between the two ends and the groove wall of the flow channel 110 is relatively large. The sealing element 220 can fully cover the first draft surface 2102a and the second draft surface 2102b along the first direction from the bottom surface to the top surface, and seal the gap 300 at both ends simultaneously by elastic compression; or, two sealing elements 220 can be provided, one of which surrounds the first draft surface 2102a and the other surrounds the second draft surface 2102b, to specifically seal the gap 300 at both ends.

[0047] The design of different draft surfaces 2101 can meet the requirements of actual demolding convenience and structural stability. In the embodiments of this application, the sealing element 220 can be flexibly set for different draft surfaces 2101. The sealing element 220 fills the gap 300 formed between the outer periphery of the insulating sleeve 210 and the groove wall of the flow channel 110 to block the leakage of the medium and the corrosion path, thereby achieving effective protection of the pole frame assembly.

[0048] like Figure 2 As shown, in one embodiment, the insulating sleeve 210 includes an integrally formed base plate 211 and a skirt 212. The skirt 212 is disposed around at least a portion of the base plate 211 to form a flow channel 230 on the upper surface of the base plate 211.

[0049] The bottom surface of the insulating sleeve 210 is formed on the lower surface of the base plate 211 and contacts the bottom of the groove of the flow channel 110. The base plate 211 provides stable support, which can prevent the insulating sleeve 210 from shifting position to a certain extent. The draft surface 2101 is formed on the outer periphery of the skirt 212. The skirt 212 can be completely or partially surrounded by the base plate 211, forming a continuous integral with the base plate 211, which is used to improve the leakage resistance of the insulating sleeve 210. The base plate 211 and the skirt 212 can be formed in one step by injection molding, compression molding or other processes, without the need for assembly processing, which can reduce processing steps. In addition, the flow channel 110 of the frame 100 can also be provided with a matching groove corresponding to the skirt 212. The skirt 212 and the groove of the frame 100 cooperate to achieve the purpose of preventing the entry of alkaline solution.

[0050] A flow channel section 230 is constructed on the upper surface of the base plate 211. The required structural parameters of the flow channel section 230 can be flexibly set, such as the number of flow channels, whether the flow channel is divided into multiple flow channel segments, and the cross-sectional area of ​​the flow channel segment (the cross-sectional area of ​​the flow channel segment is used to represent the cross-sectional area of ​​the flow channel segment in the direction perpendicular to the flow channel segment), so as to suit different requirements of actual applications such as flow distribution and flow rate control of the electrolytic cell.

[0051] In other embodiments of this application, the skirt 212 may be configured to include a skirt body 2121 and a rolled edge 2122. One side of the skirt body 2121 is connected to the base plate 211, and the other side is connected to the rolled edge 2122. The rolled edge 2122 extends outward in a direction away from the base plate 211 to further improve the stability of the overall structure and facilitate the assembly of the insulating component 200 to the flow channel 110 of the frame 100. In addition, besides constructing a flow channel portion 230 on the upper surface of the base plate 211, a relatively thick base plate 211 may be used, with a groove cut in the middle of the base plate 211 to form the flow channel portion 230. This is to enhance the stability of the overall structure of the insulating sleeve 210 through the thicker base plate 211 and further optimize the anti-leakage performance.

[0052] like Figure 5 As shown, in one embodiment, a first positioning part 410 is provided on the outside of the insulating sleeve 210, and a second positioning part 420 is provided on the groove wall of the flow channel 110. The first positioning part 410 and the second positioning part 420 are engaged and adapted to each other.

[0053] The insulating sleeve 210 is fixed to the flow channel opening 110 by a snap-fit ​​connection, which can reduce the possibility of misalignment during installation, improve assembly efficiency, facilitate disassembly and assembly, and effectively reduce assembly time. One of the first positioning part 410 and the second positioning part 420 includes a positioning protrusion, and the other includes a positioning groove that snaps into the positioning protrusion. The first positioning part 410 and the second positioning part 420 form a quick-assembly snap-fit ​​design. During snap-fit ​​engagement, the insulating sleeve 210 and the frame 100 quickly engage and automatically lock, connecting the insulating sleeve 210 and the frame 100 into a whole. This prevents the insulating sleeve 210 from vertically shifting relative to the frame 100 to a certain extent. The circumferential constraint provided by the engagement of the first positioning part 410 and the second positioning part 420 suppresses circumferential rotation, improves the overall structural stability of the pole frame assembly, and better fits and protects the plane and sides of the flow channel groove 120. The first positioning part 410 and the second positioning part 420 will form an interference fit or elastic compression effect through the sealing member 220, so that the insulating sleeve 210 and the surface of the frame 100 are tightly attached, eliminating the gap between them. This is used to prevent corrosive gas-liquid mixtures or electrolytes generated by electrolysis from seeping through the gap 300 between the bushing and the frame 100 to a certain extent, reducing the risk of leakage, effectively optimizing the protection effect on the electrode frame, and improving safety when the electrode frame assembly is applied to the electrode plate 10.

[0054] It should be noted that the insulating sleeve 210 can be a split bushing. In addition to being connected to the frame 100 by snap-fit, it can also be connected to the frame 100 by welding, gluing and other connection methods to achieve the purpose of isolating alkaline solution.

[0055] like Figure 5 As shown, as an example, the first positioning part is a continuous annular shape arranged along the skirt edge. This optimizes the positioning strength and, to some extent, prevents circumferential displacement of the insulating sleeve 210 relative to the frame 100, thus optimizing the stability of the overall structure. It also uniformly compresses the sealing element 220, achieving a stable sealing effect.

[0056] As another example, the first positioning part 410 includes multiple connecting segments (not shown) discontinuously distributed along the skirt edge 212. The multiple connecting segments can be formed on the same annular path or on different annular paths (such as upper and lower annular paths) to optimize positioning strength and to a certain extent avoid circumferential displacement of the insulating sleeve 210 relative to the frame 100. It can also reduce processing materials and processing costs and achieve flexible configuration.

[0057] like Figure 5 As shown, in one embodiment, the insulating sleeve 210 is provided with at least one first positioning portion 410 from the bottom surface to the top surface.

[0058] The first positioning part 410 is annular, and the bottom surface of the insulating sleeve 210 contacts the bottom of the channel opening 110. At least one first positioning part 410 is provided on the insulating sleeve 210 in the first direction D1 from the bottom surface to the top surface. When there is one first positioning part 410, it can be configured as a continuous annular shape along the skirt edge 212, or as multiple connecting segments discontinuously distributed along the skirt edge 212. When there are two, three or more first positioning parts 410, the multiple first positioning parts 410 can be configured to be spaced apart along the first direction. Each first positioning part 410 can be configured as a continuous annular shape along the skirt edge 212, or as multiple connecting segments discontinuously distributed along the skirt edge 212. Specifically, the number of the first positioning part 410 can be set according to actual conditions, and the number of the second positioning part 420 can be adjusted accordingly. By increasing the number of the first positioning part 410, the connection stability between the insulating sleeve 210 and the frame 100 can be improved. The number and position of the sealing part 220 can be adjusted according to the positions of the first positioning part 410 and the second positioning part 420, so as to further optimize the sealing and positioning effect, reduce the occurrence of leakage problems, and optimize the protection effect on the pole frame assembly.

[0059] It should be noted that when the insulating sleeve 210 includes an integrally formed base plate 211 and skirt 212, and the skirt 212 is configured to include a skirt body 2121 and a rolled edge 2122, the sealing element 220 can be provided at any position between the first positioning part 410 and the rolled edge 2122, or between adjacent first positioning parts 410, etc., without limitation.

[0060] like Figure 1 As shown, embodiments of this application also provide an electrode plate 10, which includes a main electrode plate 500 and an electrode frame assembly as described in the above embodiments. The electrode frame assembly is disposed around the main electrode plate 500, and the flow channel groove 120 communicates with the surface of the main electrode plate 500.

[0061] The main electrode 500 is used to directly participate in the electrochemical reaction. The uniform conductivity of the main electrode 500 surface ensures a stable current density distribution. The electrode frame assembly is fitted around the main electrode 500 and surrounds it.

[0062] The specific structure of the electrode plate 10 is as described in the above embodiments. Since the electrode plate 10 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0063] like Figure 6 As shown in the embodiments of this application, when the electrode plate is applied to the electrolysis unit, the electrolysis unit includes an anode plate 21, a positive electrode 22, a diaphragm 23, a negative electrode 24, and a cathode plate 25 arranged sequentially along a first direction. At least one of the anode plate 21 and the cathode plate 25 adopts the electrode plate 10 as described in the above embodiment.

[0064] The anode plate 21 acts as a current collector, providing structural support and uniformly distributing the current from the external power source to the surface of the anode electrode 22, ensuring a uniform current density distribution. During electrolysis, an oxidation reaction occurs on the surface of the anode electrode 22, producing oxygen, chlorine, and other gases. A reduction reaction occurs on the surface of the cathode electrode 24, which receives electrons from the cathode plate 25, producing hydrogen and other gases. The cathode plate 25 acts as a current collector, collecting electrons from the external circuit and uniformly conducting them to the surface of the cathode electrode 24. The diaphragm 23 selectively allows ion migration to complete the current loop while simultaneously preventing the mixing of anode and cathode products.

[0065] The electrode plate 10 in the foregoing embodiments of this application can be used as an anode plate 21, a cathode plate 25, or a bipolar plate. At least one of the anode plate 21 and cathode plate 25 adopts the electrode plate 10 as described in the above embodiments. When both adopt the electrode plate 10 of the foregoing embodiments, two electrodes need to be provided in the same electrolysis unit. Through the optimized design of the electrode plate 10 in the foregoing embodiments, the probability of corrosion of the electrode frame assembly flow channel groove 120 or the area near the flow channel groove 120 and the flow channel opening 110 due to leakage of electrolytes such as alkali or gas-liquid mixtures is effectively reduced. This solves the technical problem of difficulty in effectively protecting the flow channel of the electrode frame assembly, thereby ensuring the long-term stable operation of the electrolytic cell to a certain extent.

[0066] The specific structure of the electrode plate 10 is as described in the above embodiments. Since the anode plate 21 and cathode plate 25 adopt all the technical solutions of all the above embodiments, they have at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0067] like Figure 6 As shown in the embodiments of this application, when applied to an electrolytic cell, the electrolytic cell includes an electrolytic unit as described in the above embodiment. Multiple electrolytic units are stacked along a first direction. The electrode plate 10 has a first surface and a second surface disposed opposite to each other. The first surface is configured as the anode plate 21 of one of two adjacent electrolytic units, and the second surface is configured as the cathode plate 25 of the other of the two adjacent electrolytic units.

[0068] For example, the electrode plate 10 is applied to an electrolysis unit. The first direction D1 can be used to indicate the direction in which the electrode plate 10 is arranged relative to the electrolysis unit (such as an anode chamber, a cathode chamber, etc.). This first direction does not actually conflict with the direction of the insulating sleeve 210 from the bottom surface to the top surface in the aforementioned embodiment. There are multiple electrolysis units, and the multiple electrolysis units are stacked along the first direction D1.

[0069] An electrolysis unit can be an electrolysis chamber, and multiple electrolysis units can be connected in series or in parallel. In series connection, adjacent electrolysis units are connected via bipolar plates; that is, the cathode plate 25 of the preceding unit shares the same bipolar plate with the anode plate 21 of the following unit. The anode plate 21 of the first electrolysis unit is connected to the positive terminal of the power supply, the anode plate 21 of the first electrolysis unit is connected to the anode plate 21 of the second electrolysis unit, and so on, with the cathode plate 25 of the last electrolysis unit connected to the negative terminal of the power supply, forming a series circuit of "anode → bipolar plate cathode / anode → cathode". In parallel connection, the anode plates 21 of all electrolysis units are connected to the positive terminal of the power supply, and the cathode plates 25 are connected to the negative terminal of the power supply, forming a parallel circuit.

[0070] The electrode plate 10 in the foregoing embodiments of this application can be used as a bipolar plate. The electrode plate 10 has a first surface and a second surface disposed opposite to each other. The first surface is configured as the anode reaction zone of one of two adjacent electrolysis units, and the second surface is configured as the cathode reaction zone of the other of the two adjacent electrolysis units. The electrode plate 10 has a first gas outlet channel 131 and a first liquid inlet channel 132 disposed corresponding to the first surface, and a second gas outlet channel 133 and a second liquid inlet channel 134 disposed corresponding to the second surface. The specific structure of the first gas outlet channel 131 and the second gas outlet channel 133 can be referred to the relevant description of the channel portion 230 as the gas outlet portion in the foregoing embodiments. The specific structure of the first liquid inlet channel 132 and the second gas outlet channel 133 can be referred to the relevant description of the channel portion 230 as the liquid inlet portion in the foregoing embodiments.

[0071] The specific structure of the electrolytic cell is as described in the above embodiments. Since this electrolytic cell adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0072] 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. A polar frame assembly, characterized in that, include: A frame (100) is provided with a flow channel opening (110), and a flow channel groove (120) is provided in the inner ring of the frame (100), and the flow channel opening (110) is connected to the flow channel groove (120); An insulating assembly (200) includes an insulating sleeve (210) and a sealing element (220). The insulating sleeve (210) is embedded in the flow channel opening (110). The insulating sleeve (210) is provided with a flow channel portion (230), which communicates with the flow channel groove (120). The sealing element (220) is disposed around the outer periphery of the insulating sleeve (210) and between the insulating sleeve (210) and the flow channel (110).

2. The polar frame assembly as described in claim 1, characterized in that, The outer peripheral surface of the insulating sleeve (210) forms a draft surface (2101), and a gap (300) is formed between the draft surface (2101) and the flow channel (110), and the seal (220) fills the gap (300).

3. The polar frame assembly as described in claim 2, characterized in that, The bottom surface of the insulating sleeve (210) contacts the bottom of the groove of the flow channel (110), and the outline of the insulating sleeve (210) gradually expands from the bottom surface to the top surface to form the draft surface (2101).

4. The polar frame assembly as described in claim 2, characterized in that, The draft surface (2101) includes a first draft surface (2102a) and a second draft surface (2102b); The bottom surface of the insulating sleeve (210) contacts the bottom of the groove of the flow channel (110), and the outline of the insulating sleeve (210) gradually expands from the bottom surface to the middle to form the first draft surface (2102a). The insulating sleeve (210) has a tapered profile from the middle to the top surface to form the second draft surface (2102b). The first draft surface (2102a) and the second draft surface (2102b) are in contact at the maximum outer periphery of the insulating sleeve (210).

5. The polar frame assembly as described in any one of claims 1 to 4, characterized in that, The insulating sleeve (210) includes an integrally formed base plate (211) and skirt (212); The skirt (212) is provided around at least a portion of the base plate (211) to form the flow channel (230) on the upper surface of the base plate (211).

6. The polar frame assembly as described in claim 5, characterized in that, The insulating sleeve (210) is provided with a first positioning part (410) on the outside, and the groove wall of the flow channel (110) is provided with a second positioning part (420). The first positioning part (410) and the second positioning part (420) are engaged and adapted to each other.

7. The polar frame assembly as claimed in claim 6, characterized in that, The first positioning part (410) is a continuous ring shape arranged around the skirt edge (212).

8. The polar frame assembly as claimed in claim 6, characterized in that, The first positioning part (410) includes a plurality of connecting segments discontinuously distributed along the skirt edge (212).

9. The polar frame assembly as claimed in claim 6, characterized in that, The insulating sleeve (210) is provided with at least one first positioning part (410) from the bottom surface to the top surface.

10. An electrode plate (10), characterized in that, Includes a main electrode plate (500) and an electrode frame assembly as described in any one of claims 1 to 9; The pole frame assembly is arranged around the main pole plate (500), and the flow channel groove (120) is in communication with the surface of the main pole plate (500).

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