A PEM electrolyzer plate structure and single cell

Abstract

The present invention discloses a PEM electrolyzer plate structure and a single cell, relating to the field of electrolyzer technology. The PEM electrolyzer plate structure includes a bare plate, a cathode flow channel network, a cathode titanium felt, an anode flow channel network, and an anode titanium felt. The bare plate has two opposing side surfaces. On one side surface of the bare plate, the cathode flow channel network and the cathode titanium felt are sequentially provided from the inside to the outside. On the other side surface of the bare plate, the anode flow channel network and the anode titanium felt are sequentially provided from the inside to the outside. The cathode titanium felt, the cathode flow channel network, the bare plate, the anode flow channel network, and the anode titanium felt form an integrated structure. The present invention simplifies the stacking and assembly process, reduces processing costs, and improves processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic cells, and in particular to a PEM electrolytic cell plate structure and a single cell. Background Art

[0002] As one of the important components of the PEM electrolyzer, the plate plays the following roles: supporting the membrane electrode and gas diffusion layer, dividing and sealing the gas and liquid, uniformly transmitting and distributing the reactants and products, collecting current and conducting electrons, conducting heat and uniformly controlling the temperature of the reaction zone, etc.

[0003] Currently, the flow field structure on the electrode plate of a traditional electrolytic cell is processed using an etching process. However, this process is costly and has a long processing cycle, resulting in low production efficiency. At the same time, the flow field structure and the gas diffusion component contact each other during assembly, which not only easily leads to assembly misalignment between the two, but also has a large contact resistance, reducing overall performance. Therefore, this processing method is only suitable for early proofing and is not conducive to later mass production. Summary of the Invention

[0004] The problem to be solved by the present invention is how to improve processing efficiency, reduce processing costs, reduce contact resistance, and improve performance, thereby facilitating subsequent mass production.

[0005] In the first aspect, the present invention application provides a PEM electrolytic cell plate structure, comprising a bare plate, a cathode flow channel network, a cathode titanium felt, an anode flow channel network, and an anode titanium felt, wherein the bare plate has two oppositely arranged side surfaces, and the cathode flow channel network and the cathode titanium felt are sequentially arranged on one side surface of the bare plate from the inside to the outside, and the anode flow channel network and the anode titanium felt are sequentially arranged on the other side surface of the bare plate from the inside to the outside, and the cathode titanium felt, the cathode flow channel network, the bare plate, the anode flow network, and the anode titanium felt constitute an integrated structure.

[0006] Optionally, a cathode titanium mesh is further provided between the cathode flow channel mesh and the cathode titanium felt, and / or an anode titanium mesh is further provided between the anode flow channel mesh and the anode titanium felt. The cathode titanium felt, the cathode titanium mesh, the cathode flow channel mesh, the light plate, the anode flow channel mesh, the anode titanium mesh, and the anode titanium felt are arranged in sequence to form an integrated structure.

[0007] Optionally, the flow paths of the anode flow channel network and the cathode flow channel network are perpendicular to each other.

[0008] Optionally, the anode flow channel network and the cathode flow channel network are both made by stamping.

[0009] Optionally, the anode titanium felt, the anode titanium mesh and the anode flow channel mesh have the same outer dimensions, the cathode titanium felt, the cathode titanium mesh and the cathode flow channel mesh have the same outer dimensions, and the outer dimensions of the anode titanium felt are larger than those of the cathode titanium felt.

[0010] In a second aspect, the present invention provides a single cell comprising a PEM electrolyzer plate structure as described in any one of the first aspects above.

[0011] Optionally, the single cell further includes a membrane electrode and a frame, and the electrode structure includes two, the front side of the frame is sealed with the membrane electrode and the anode side of one of the electrode plates in sequence, wherein one side of the membrane electrode is sealed with the front side of the frame through a seal, the other side of the membrane electrode is pressed and sealed by the electrode plate structure in contact with it, and the back side of the frame is sealed with the cathode side of the other electrode plate structure through the seal.

[0012] Optionally, the frame is a plastic frame structure.

[0013] Optionally, the seal includes an inner rubber seal and an outer rubber seal. One side of the membrane electrode is sealed to the front side of the frame through the inner rubber seal. The front side of the frame is also sealed to one of the plate structures through the outer rubber seal. The back side of the frame is sealed to the cathode side of another plate structure through the outer rubber seal.

[0014] The beneficial effect of the PEM electrolytic cell plate structure applied for in the present invention is that the bare plate and the cathode titanium felt, cathode flow channel network, anode titanium felt, and anode flow channel network that constitute the plate are arranged through an integrated structure. Compared with the split structure of the prior art, it simplifies the stacking assembly process, reduces processing costs, improves processing efficiency, and at the same time reduces the contact resistance between the components, which is conducive to improving the overall performance.

[0015] The beneficial effect of the single cell applied for by the present invention is that the membrane electrode is arranged between the anode side of a plate structure and the frame, one side of which is sealed to the frame through a seal, and the other side is compressed and sealed by the plate structure, so that the size of the proton membrane can be reduced to close to the area of ​​the reaction zone, thereby greatly improving the area utilization of the proton membrane and reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the exploded structure of the plate structure applied for in the present invention;

[0017] Figure 2 Application for this invention Figure 1 A schematic diagram of the structure at center A;

[0018] Figure 3This is a schematic diagram of the overall structure of a single cell in the present invention;

[0019] Figure 4 Application for this invention Figure 3 AA section view;

[0020] Figure 5 Application for this invention Figure 4 A magnified schematic diagram of the structure at C;

[0021] Figure 6 This is a schematic diagram of the explosion structure of a single cell in the present invention;

[0022] Figure 7 Application for this invention Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0023] Figure 8 This is a schematic diagram of the front structure of the frame of the present invention;

[0024] Figure 9 This is a schematic diagram of the back structure of the frame of the present invention;

[0025] Description of Reference Numerals

[0026] 1. Bare plate; 11. Flow channel opening; 2. Anode flow channel mesh; 3. Cathode flow channel mesh; 4. Anode titanium mesh; 5. Cathode titanium mesh; 6. Anode titanium felt; 7. Cathode titanium felt; 8. Membrane electrode; 81. Positioning hole; 9. Frame; 91. Anode flow channel opening; 911. Anode bridge flow channel; 92. Cathode flow channel opening; 921. Cathode bridge flow channel; 93. Inner sink; 931. Positioning protrusion; 94. Inner rubber sealing groove; 95. Cathode side outer rubber sealing groove; 96. Anode side outer rubber sealing groove; 97. Assembly positioning hole; 10. Seal; 101. Inner rubber seal; 102. Outer rubber seal. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present application specification, and the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from specific parts, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application specification, the meaning of "multiple" is two or more.

[0029] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1: This embodiment provides a PEM electrolyzer plate structure, such as Figure 1 As shown, it includes a light plate 1, a cathode flow channel network 3, a cathode titanium felt 7, an anode flow channel network 2, and an anode titanium felt 6, wherein the light plate 1 has two side surfaces arranged opposite to each other, and the cathode flow channel network 3 and the cathode titanium felt 7 are arranged in sequence from the inside to the outside on the corresponding positions of the side surface of one side of the light plate 1, and the anode flow channel network 2 and the anode titanium felt 6 are arranged in sequence from the inside to the outside on the corresponding positions of the side surface of the other side of the light plate 1, and the cathode titanium felt 7, the cathode flow channel network 3, the light plate 1, the anode flow channel network 2, and the anode titanium felt 6 are constructed into an integrated structure.

[0031] From the above, it can be seen that compared with the prior art, the present invention applies an integrated design of the cathode side of the light plate 1 with the cathode flow channel network 3 and the cathode titanium felt 7, and its anode side with the anode flow channel network 2 and the anode titanium felt 6, and finally forms an integrated structure. By integrating the various components into one design, the difficulty of assembly is reduced, and the workload of subsequent stacking is greatly simplified, avoiding the problems of assembly dislocation or unreliable connection, and improving assembly efficiency and assembly accuracy; secondly, due to the adoption of the integrated design of the one-piece electrode structure, the traditional method of using the etching process to process the flow channel on the light plate 1 is abandoned, which not only reduces the material thickness of the light plate 1 and saves the material usage cost, but also reduces the complexity of processing and manufacturing; finally, the design of the one-piece electrode structure can also reduce the contact resistance between the components and improve the overall performance.

[0032] Optionally, the above-mentioned light plate 1 adopts a titanium substrate. Titanium has excellent corrosion resistance, low initial resistivity, good mechanical strength and light weight. In the present application, the titanium substrate is processed into corresponding sizes by laser cutting. According to the traditional way of using the plate, it is also necessary to plate the titanium surface with precious metals or platinum group metals. This not only makes the processing technology more complicated, but also increases the material cost. In the present application, the light plate 1 adopts a titanium substrate, which omits the coating process, simplifies the processing technology, and reduces the processing cost. At the same time, compared with the traditional method of using an etching process to process the flow channel on the surface of the plate, the present application directly adopts a light plate structure, which can reduce the material thickness and greatly reduce the cost of material use.

[0033] Optionally, the anode titanium felt 6 and the cathode titanium felt 7 are both made of porous titanium fiber felt to increase the surface area and improve the reaction efficiency.

[0034] Optionally, the anode flow channel net 2 and the cathode flow channel net 3 adopt a titanium mesh structure, which adopts a plate mesh stamping method to process the flow channel, which has a simple processing technology and low cost. The flow channels of the anode flow channel net 2 and the cathode flow channel net 3 can adopt point-shaped flow channels, parallel flow channels, serpentine flow channels, needle-shaped flow channels and interdigitated flow channels, etc. In the present application, the anode flow channel net 2 and the cathode flow channel net 3 both adopt parallel flow channels. Specifically, Figure 2 , is an enlarged view of a portion of the anode flow network structure. As can be seen from the figure, the anode flow network includes multiple horizontally arranged first grooves 21, each extending from one end of the anode flow network 2 to the other. Multiple first grooves 21 are spaced apart and arranged in parallel from top to bottom, forming parallel flow channels. Parallel flow channels can improve fluid velocity and concentration distribution uniformity. The cathode flow network 3 includes multiple vertically arranged second grooves, each extending from one end of the cathode flow network 3 to the other. Multiple second grooves are spaced apart and arranged in parallel from left to right, forming parallel flow channels.

[0035] Optionally, the flow directions of the anode flow channel network 2 and the cathode flow channel network 3 are perpendicular to each other, that is, when arranged, if the flow direction on the anode flow channel network 2 is horizontal as described in the application of the present invention, then the corresponding flow direction of the cathode flow channel network 3 should be arranged in a vertical direction. Conversely, if the flow direction on the anode flow channel network 2 is vertical, then the corresponding flow direction of the cathode flow channel network 3 should be horizontal, so as to achieve uniform transmission and distribution of reactants and products.

[0036] Optionally, a cathode titanium mesh 5 is further provided between the cathode flow channel mesh 3 and the cathode titanium felt 7, and / or an anode titanium mesh 4 is further provided between the anode flow channel mesh 2 and the anode titanium felt 6. The cathode titanium felt 7, cathode titanium mesh 5, cathode flow channel mesh 3, light plate 1, anode flow channel mesh 2, anode titanium mesh 4, and anode titanium felt 6 are arranged in sequence, first welded as a whole through a hot pressing sintering process to form an integrated structure, and then the outer surface of the integrated structure is PVD-coated.

[0037] During actual use, if the anode titanium felt 6 and the cathode titanium felt 7 are directly in contact with the anode flow channel net 2 and the cathode flow channel net 3 respectively to form an integrated structure, due to the uneven flow channel structure on the anode flow channel net 2 and the cathode flow channel net 3, not only will the anode titanium mesh 4 and the cathode titanium mesh 5 in contact with them be easily compressed and deformed, affecting their performance, but the welding area between the flow channel net and the corresponding titanium mesh is also small, which can easily lead to the risk of sealing failure. The cathode titanium mesh 5 arranged between the cathode flow channel mesh 3 and the cathode titanium felt 7, and / or the anode titanium mesh 4 arranged between the anode flow channel mesh 2 and the anode titanium felt 6, the anode titanium mesh 4 and the cathode titanium mesh 5 are made of titanium metal and have a mesh structure. They are formed by weaving, stamping or welding processes, and have excellent properties such as high mechanical strength and corrosion resistance. Therefore, in the application of the present invention, the anode titanium mesh 4 and the cathode titanium mesh 5 can not only play a supporting role to prevent the anode flow channel mesh 2 and the cathode flow channel mesh 3 in contact with them from being compressed and deformed, but also increase the effective welding area of ​​the flow channel mesh and the titanium felt in contact with them, ensure the sealing of the welding, effectively prevent the risk of sealing failure, and at the same time effectively increase the contact area between the various components, reduce the contact resistance between the various components, and ensure the performance of the plate structure.

[0038] Optionally, the anode titanium felt 6, the anode titanium mesh 4 and the anode flow channel network 2 have the same external dimensions, that is, the length and width dimensions are the same, the cathode titanium felt 7, the cathode titanium mesh 5 and the cathode flow channel network 3 have the same external dimensions, and the external dimensions of the anode titanium felt 6 are larger than the external dimensions of the cathode titanium felt 7. Since the anode titanium felt 6, the anode titanium mesh 4 and the anode flow channel network 2 on the anode side of the light plate 1 have the same external dimensions, and the cathode titanium felt 7, the cathode titanium mesh 5 and the cathode flow channel network 3 on the cathode side of the light plate 1 have the same external dimensions, the external dimensions of each component on the anode side of the light plate 1 are larger than the external dimensions of each component on the cathode side of the light plate 1. This setting is designed to ensure the sealing of the integration of the electrode plate and other components, and its specific function will be introduced in the following single cell structure.

[0039] The integrated structure processing method of the PEM electrolyzer plate includes the following steps:

[0040] Step 1: The light plate uses a titanium plate as a base material and is processed into corresponding sizes by laser cutting;

[0041] Step 2: Processing the cathode flow channel network and the anode flow channel network into corresponding shapes by stamping;

[0042] Step 3: On one side of the bare plate, a cathode flow channel network, a cathode titanium mesh, and a cathode titanium felt are sequentially arranged from the inside to the outside. On the other side of the bare plate, an anode flow channel network, an anode titanium mesh, and an anode titanium felt are sequentially arranged from the inside to the outside. After assembling them in this order, they are integrated and welded together using a hot pressing sintering process to form an integrated plate structure.

[0043] Step 4: Perform PVD coating on the outer surface of the integrated plate structure to complete the processing.

[0044] Example 2, Example 2 of the present invention application provides a single cell, including the electrode plate structure as described above.

[0045] The beneficial effects of the single cell of this embodiment compared to the prior art are the same as those of the above-mentioned electrode plate structure, and will not be repeated here.

[0046] Alternatively, as Figures 3 to 6 As shown, the single cell also includes a membrane electrode 8 and a frame 9, wherein the plate structure includes two, the front side of the frame 9 is sealed with the membrane electrode 8 and the anode side of one plate structure in sequence, the membrane electrode 8 is close to the front side of the frame 9 and is sealed with the front side of the frame 9 through a seal 10, the other side of the membrane electrode 8 is pressed and sealed by the anode side of the plate structure in contact with it, and the back side of the frame 9 is sealed with the cathode side of the other plate structure through a seal 10.

[0047] Specifically, the membrane electrode 8 is the core component of the PEM electrolyzer, which is composed of a proton conducting membrane. Both the anode and cathode sides of the proton conducting membrane are coated with a porous electrocatalyst layer, which plays the following roles: conducting protons (H +), blocking the passage of electrons and gases, ensuring the separation of hydrogen and oxygen during electrolysis; catalyzing the reaction, lowering the energy threshold for water decomposition, and accelerating the reaction process. At the same time, in traditional membrane electrode designs, the size of the membrane electrode is generally consistent with the size of the electrode plate. However, during operation, only the intermediate reaction zone (i.e., the catalyst coating area) is truly functional, while the large area at the edge of the proton membrane is designed to be the same size as the electrode plate only for sealing and size matching considerations. This results in considerable material waste, and the cost of the membrane electrode is high, which also increases the cost of use. In the present application, one side of the membrane electrode 8 is sealed to the front of the frame 9 by a seal, and the other side of the membrane electrode 8 is compressed and sealed by the anode side of the electrode plate structure. As described in the above-mentioned electrode plate structure, the external dimensions of the various components on the anode side of the electrode plate structure (including the anode titanium felt 6, the anode titanium mesh 4, and the anode flow channel network 2) are larger than the external dimensions of the various components on the cathode side of the electrode plate structure (including the cathode titanium felt 7, the cathode titanium mesh 5, and the cathode flow channel network 3). Therefore, since the various components on the anode side are set with larger external dimensions, which are slightly smaller than the external dimensions of the membrane electrode 8, the membrane electrode 8 can be pressed and sealed to ensure the sealing effect. In the application of the present invention, the membrane electrode 8 can be set with a smaller area, which not only still ensures the sealing effect, but also improves the effective utilization rate of the membrane electrode 8 area and reduces the material usage cost.

[0048] Optionally, the frame 9 is a plastic frame structure, and the middle portion of the frame 9 is hollow, which is used to reserve space for the diffusion layer of the electrode plate. In actual use, the electrolytic cell adopts the single cell of the present invention, which includes dozens to hundreds of single cells, and each single cell is connected in series. Since the present invention adopts a plastic frame, it can not only reduce the weight of the entire electrolytic cell, but also help improve the insulation performance between the single cells.

[0049] Specifically, such as Figure 8 The front structure of the frame 9 is shown. Two anode flow openings 91 are respectively provided near the upper and lower edges of the front of the frame 9 (in the Y direction in the figure). Either of the two anode flow openings 91 is the anode flow inlet, and the other is the anode flow outlet. This can be selected and applied according to actual needs. In the present application, both anode flow openings 91 adopt a rectangular through-hole structure. Two cathode flow openings 92 are respectively provided near the left and right edges of the front of the frame 9 (in the X direction in the figure). Either of the two cathode flow openings 93 is the cathode flow inlet, and the other is the cathode flow outlet. This can be selected and applied according to actual needs. Both cathode flow openings 92 adopt a rectangular through-hole structure.

[0050] Specifically, on the light plate 1 in the plate structure, flow channels 11 are provided near the edges thereof. The four flow channels 11 are respectively provided corresponding to the two anode flow channels 91 and the two cathode flow channels 92 on the frame 9 .

[0051] Optionally, an anode bridge flow channel 911 is further provided on the front of the frame 9, and the two anode bridge flow channels 911 are respectively located between the two anode flow channel openings 91 and the hollow area in the middle of the frame 9. The anode bridge flow channel 911 includes a guide groove that runs through in the vertical direction (Y direction in the figure), and a plurality of guide grooves are arranged in parallel and spaced apart. By setting the anode bridge flow channel 911, the fluid on the anode side of the plate structure can be evenly distributed under the action of the guide groove. The design of the bridge flow channel is not limited to the above structure, and a wavy guide groove structure or a plurality of staggered protrusions and other structures can also be used to achieve similar effects.

[0052] Alternatively, as Figure 9 The back structure of the frame 9 is shown. Cathode bridge channels 921 are also provided at the left and right ends of the back of the frame 9. The two cathode bridge channels 921 are respectively located between the two cathode channel openings 92 and the hollow area in the middle of the frame 9. The cathode bridge channels 921 include guide grooves that run through the horizontal direction (X direction in the figure), and multiple guide grooves are arranged in parallel and spaced apart. The provision of the cathode bridge channels 921 allows the fluid on the cathode side of the plate structure to be evenly distributed under the action of the guide grooves. The design of the bridge channel is not limited to the above structure. A wavy guide groove structure or a plurality of staggered protrusions can also be used to achieve a similar effect.

[0053] Alternatively, as Figure 7 The figure shows an enlarged schematic diagram of the local structure on the front side of the frame. The front side of the frame 9 is also provided with a contoured inner groove 93 corresponding to the membrane electrode 8. Through the setting of the inner groove 93, the membrane electrode 93 is embedded in the interior of the frame 9 for installation, avoiding problems such as misalignment and displacement of the membrane electrode 8 during assembly. At the same time, notch areas are also provided at both ends of the membrane electrode 8 and on the side in contact with the inner groove 93. The notch area facilitates the assembly of the membrane electrode 8 and further ensures that the membrane electrode 8 can be accurately positioned during assembly.

[0054] Optionally, in order to further ensure the accuracy of the assembly of the membrane electrode 8 and the frame 9, positioning protrusions 931 are provided at the four corners of the inner groove 93. The positioning protrusions 931 can be cylindrical, truncated cone, conical, etc., and a positioning hole 81 that matches the positioning protrusion 931 is provided on the membrane electrode 8. Through the cooperation between the positioning protrusion 931 and the positioning hole 81, the membrane electrode 8 can ensure the firmness of the assembly.

[0055] Alternatively, as Figure 6As shown, the seal 10 includes an inner rubber seal 101 and an outer rubber seal 102. The front of the frame 9 is sealed to the membrane electrode 8 through the inner rubber seal 101. The front of the frame 9 is also sealed to the anode side of one plate structure through the outer rubber seal 102. The back of the frame 9 is sealed to the cathode side of another plate structure through the outer rubber seal 102. The adhesive material selected for the inner rubber seal 101 and the outer rubber seal 102 is a non-conductive material with good electrical insulation performance. For example, a sealing adhesive material such as EPDM or fluororubber is used to achieve the connection. By setting the inner rubber seal 101 and the outer rubber seal 102, the membrane electrode 8 and the frame 9, and the frame 9 and the plate structure are connected by bonding, thereby ensuring the sealing effect of the single cell and preventing the risk of sealing failure.

[0056] Specifically, such as Figure 7 As shown in the enlarged schematic diagram of the local structure of the front side of the frame, an inner glue sealing groove 94 is provided on the front side of the frame 9, corresponding to the bottom peripheral position of the inner sinking groove 93. The inner glue sealing groove 94 corresponds to the inner glue seal 101. The inner glue seal 101 is formed by injecting the sealing adhesive material into the inner glue sealing groove 94, thereby realizing bidirectional bonding between the front side of the frame 9 and the membrane electrode 8, so that the front side of the frame 9 is bonded to one side of the membrane electrode 8.

[0057] Specifically, such as Figure 8 The front structure of the frame 9 shown is as follows: the front of the frame 9 is provided with an anode-side outer rubber sealing groove 96. An outer rubber seal 102 is formed by injecting a sealing adhesive material into the anode-side outer rubber sealing groove 96. The outer rubber seal 102 is located at the outer edge of the front of the frame 9 and seals the corresponding anode reaction area to prevent liquid leakage in the anode reaction area. The back of the frame 9 is provided with a cathode-side outer rubber sealing groove 95. An outer rubber seal 102 is formed by injecting a sealing adhesive material into the cathode-side outer rubber sealing groove 95. The outer rubber seal 102 is located at the outer edge of the back of the frame 9 and seals the corresponding cathode reaction area to prevent liquid leakage in the cathode reaction area.

[0058] Specifically, such as Figure 4 、 5As shown in the cross-sectional view of a single cell, the cathode reaction zone corresponding to the back of the frame 9 is used as an example for detailed description. The fluid enters from the cathode flow channel opening 92, is evenly distributed through the cathode bridge flow channel 921 of the frame 9 connected thereto, and then enters the cathode titanium felt 7 for reaction. The product after the reaction is collected through the cathode bridge flow channel 921 on the other side and then flows out from another cathode flow channel opening 93. The working principle of the anode reaction zone on the front of the frame 9 is similar to that of the above-mentioned cathode reaction zone, and will not be repeated here. Since the membrane electrode 8 is sealed to the front of the frame 9 through the internal seal 101, and the front and back of the frame 9 are respectively sealed to the two plate structures through the external rubber seal 102, the cathode reaction zone on the front of the frame 9 and the anode reaction zone on the back of the frame 9 constitute two independent reaction chambers.

[0059] Optionally, an assembly positioning hole 97 is provided at the edge near the corner of the frame 9, and a positioning through hole matching the assembly positioning hole 97 is provided on the light plate 1 of the plate structure. The frame 9 is assembled after the assembly positioning hole 97 corresponds to the positioning through hole of the plate structure. This ensures accurate positioning, improves the installation accuracy during the integrated assembly of the single cell, and improves the installation efficiency.

[0060] The single cell provided in the embodiment of the present invention has the following advantages:

[0061] 1. The integrated plate structure can reduce the thickness of the substrate, saving material costs. At the same time, the plate side is no longer equipped with a flow channel, eliminating the etching process and reducing the complexity of processing and manufacturing.

[0062] 2. At the same time, the integrated plate structure eliminates the electroplating process and uses PVD coating on the surface, which reduces the number of coating layers and greatly increases the cost reduction space;

[0063] 3. The one-piece plate structure integrates seven important components into one, simplifying the subsequent assembly process. At the same time, it is thinner and lighter, has higher mechanical strength, and is more suitable for the current development trend of electrolytic cells towards larger plate sizes and higher currents. At the same time, it reduces the contact resistance between components, which is conducive to improving overall performance.

[0064] 4. The membrane electrode 8 is sealed and connected to the anode side of the plate structure through the frame 9, which not only ensures the effectiveness of the sealing connection, but also improves the effective utilization rate of the area of ​​the membrane electrode 8 and reduces the material cost;

[0065] 5. The introduction of the plastic frame structure is conducive to improving the insulation performance between each cell, while also ensuring assembly precision and accuracy.

[0066] The above description is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

[0067] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to the form and details without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A single pool, characterized in that It includes a PEM electrolyzer plate structure; The PEM electrolyzer plate structure includes a bare plate, a cathode flow network, a cathode titanium felt, an anode flow network, and an anode titanium felt. The bare plate has two opposite side surfaces. The cathode flow network and the cathode titanium felt are sequentially arranged on one side surface of the bare plate from the inside to the outside. The anode flow network and the anode titanium felt are sequentially arranged on the other side surface of the bare plate from the inside to the outside. The cathode titanium felt, the cathode flow network, the bare plate, the anode flow network, and the anode titanium felt form an integrated structure. A cathode titanium mesh is further provided between the cathode flow channel network and the cathode titanium felt, and / or an anode titanium mesh is further provided between the anode flow channel network and the anode titanium felt. The cathode titanium felt, the cathode titanium mesh, the cathode flow channel network, the light plate, the anode flow channel network, the anode titanium mesh, and the anode titanium felt are sequentially provided to form an integrated structure. The flow paths of the anode flow channel network and the cathode flow channel network are perpendicular to each other; The single cell also includes a membrane electrode and a frame. The electrode plate structure includes two. The front side of the frame is sealed with the membrane electrode and the anode side of one of the electrode plate structures in sequence. One side of the membrane electrode is sealed with the front side of the frame through a seal, and the other side of the membrane electrode is pressed and sealed by the electrode plate structure in contact with it. The back side of the frame is sealed with the cathode side of the other electrode plate structure through the seal.

2. The single pool according to claim 1, characterized in that The anode flow channel network and the cathode flow channel network are both made by stamping.

3. The single pool according to claim 2, characterized in that The anode titanium felt, the anode titanium mesh and the anode flow channel mesh have the same outer dimensions, the cathode titanium felt, the cathode titanium mesh and the cathode flow channel mesh have the same outer dimensions, and the outer dimensions of the anode titanium felt are larger than those of the cathode titanium felt.

4. The single pool according to claim 1, characterized in that The frame is a plastic frame structure.

5. The single pool according to claim 1, characterized in that The seal includes an inner rubber seal and an outer rubber seal. One side of the membrane electrode is sealed to the front side of the frame through the inner rubber seal. The front side of the frame is also sealed to one of the plate structures through the outer rubber seal. The back side of the frame is sealed to the cathode side of another plate structure through the outer rubber seal.

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