Electrolysis structure applied to electrolytic bath

Abstract

The embodiment of the invention discloses an electrolytic structure applied to an electrolytic bath, the electrolytic structure comprises at least two electrolytic reaction assemblies and at least one metal plate, and each electrolytic reaction assembly comprises a frame, a cathode electrolytic end, an anode electrolytic end and an exchange membrane; the frame comprises an inner-layer annular structure and an outer-layer annular structure, and the width of the inner-layer annular structure is matched with that of a non-catalytic area of the exchange membrane; a metal plate is connected between every two adjacent electrolytic reaction assemblies, and the electrolytic reaction assembly at the head end and the electrolytic reaction assembly at the tail end in the electrolytic structure are both provided with sealing lines; the front face of the inner-layer annular structure and the front face of the outer-layer annular structure form a step-shaped structure. According to the embodiment, creep deformation of the exchange membrane can be reduced, falling and failure of the catalyst layer can be reduced, assembly links of the electrolysis structure can be reduced, and time and manpower resources consumed in the assembly process are reduced.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the field of water electrolysis, in particular to an electrolysis structure applied to an electrolytic cell. BACKGROUND

[0002] Hydrogen energy is regarded as the most ideal energy carrier due to its clean and pollution-free, high efficiency, storability and transportability, etc. Electrolysis of water to produce hydrogen is currently the simplest method to obtain pure hydrogen. The electrolysis structure of the traditional electrolytic cell works in a high-pressure environment of direct charging of a high-pressure storage tank in a hydrogen station. The high-pressure environment causes the sealing interface between the traditional series of units to bear greater non-uniform stress, which may cause hydrogen leakage. When the hydrogen-oxygen mixed concentration reaches a threshold value, the explosion risk increases dramatically, and pressure equalization regulation is extremely difficult, which easily causes uneven flow to cause local overload of the electrolysis structure, greatly shortening the service life of the electrolysis structure. Therefore, a more efficient electrolysis structure is needed. At present, the existing electrolysis structure generally adopts a single stack unit structure, which cannot simultaneously accommodate the reaction carriers of the anode electrolysis end and the cathode electrolysis end in one frame, and multiple independent unit structures need to be vertically connected in series in the electrolytic cell.

[0003] However, in practice, it is found that when using the traditional electrolysis structure applied to the electrolytic cell, the following technical problems often exist:

[0004] Due to the lack of rigid support in the non-catalytic area at the edge of the traditional exchange membrane, the material of the exchange membrane is prone to creep deformation under high pressure, which causes the hydrogen permeation rate to exceed the standard, and causes the catalyst layer of the exchange membrane to fall off and fail, thereby resulting in less hydrogen produced by the electrolysis structure; due to the square circumscribed circle form of the insulating seal arranged between the traditional single stack units, the effective reaction area of the catalyst layer of the exchange membrane is lost to a certain extent, resulting in a low volume power density of the equipment, and thereby resulting in less hydrogen produced by the electrolysis structure; since each electrolysis reaction assembly in the electrolysis structure needs to be sealed for a pair of frames, the assembly process of the electrolysis structure is more complicated, which results in a longer time and more human resources consumed in the assembly process.

[0005] The above information disclosed in the background section is only intended to enhance the understanding of the background of the present disclosure concept, and therefore, it can include information that does not form the prior art known to those of ordinary skill in the art in the country. SUMMARY

[0006] The summary section is provided to introduce briefly in a simplified form the concepts that will be described in detail in the specific embodiments section. The summary section is not intended to identify key or essential features of the claimed technology nor is it intended to be used to limit the scope of the claimed technology.

[0007] Some embodiments of the present disclosure propose an electrolysis structure applied to an electrolytic cell to solve one or more of the technical problems mentioned in the background section.

[0008] In a first aspect, some embodiments of the present disclosure provide an electrolysis structure applied to an electrolytic cell, characterized in that the electrolysis structure comprises at least two electrolysis reaction assemblies and at least one metal plate, wherein each of the at least two electrolysis reaction assemblies comprises a frame, a cathode electrolysis end, an anode electrolysis end and an exchange film; the frame comprises an inner annular structure and an outer annular structure, the inner side of the inner annular structure is connected with the cathode electrolysis end, the front side of the inner annular structure is connected with the exchange film, the anode electrolysis end is connected with the exchange film, the width of the inner annular structure matches the width of the non-catalytic region of the exchange film; each adjacent two of the at least two electrolysis reaction assemblies are connected with a metal plate, one side of the metal plate is connected with the anode electrolysis end of the electrolysis reaction assembly, the other side of the metal plate is connected with the cathode electrolysis end of the electrolysis reaction assembly; the electrolysis reaction assembly at the head end and the electrolysis reaction assembly at the tail end of the at least two electrolysis reaction assemblies are both provided with a sealing line; the back side of the inner annular structure and the back side of the outer annular structure are located at the same horizontal plane, and the front side of the inner annular structure and the front side of the outer annular structure form a stepped structure.

[0009] Optionally, the anode electrolysis end is provided with a metal mesh.

[0010] Optionally, the inner annular structure and the outer annular structure are prepared by integral injection molding, and the difference between the front side of the inner annular structure and the front side of the outer annular structure is in the range of 0.4-0.6 mm.

[0011] Optionally, the metal plate is provided with a first set of communication holes, the outer annular structure is provided with a second set of communication holes, the first set of communication holes and the second set of communication holes form a vertical fluid passage, the second communication holes in the second set of communication holes are water injection holes or gas outlet holes, and the water injection holes and the gas outlet holes are distributed radially along the frame.

[0012] Optionally, the front side of the outer annular structure and both ends of the water injection hole are both provided with a round corner.

[0013] Optionally, the back side of the inner annular structure is provided with a flow guide structure adjacent to the gas outlet hole, the flow guide structure comprises a predetermined number of flow guide columns, there is a flow guide groove between each adjacent two of the predetermined number of flow guide columns, and both ends of the flow guide structure are arc-shaped.

[0014] Optionally, the sealing line of the electrolysis reaction component at the head end is located on the front surface of the outer annular structure, and the sealing line of the electrolysis reaction component at the tail end is located on the back surface of the inner annular structure.

[0015] Optionally, the sealing line of the electrolysis reaction component at the head end includes a first inner ring sealing line located at the inner ring of the outer annular structure and a first outer ring sealing line located at the outer ring of the outer annular structure, and the sealing line of the electrolysis reaction component at the tail end includes a second outer ring sealing line located at the outer ring of the outer annular structure and a second inner ring sealing line located at the inner ring of the inner annular structure, the gas outlet of the electrolysis reaction component at the head end is located between the first inner ring sealing line and the first outer ring sealing line, the water inlet of the electrolysis reaction component at the head end is located inside the first inner ring sealing line, the gas outlet of the electrolysis reaction component at the tail end is located inside the second inner ring sealing line, and the water inlet of the electrolysis reaction component at the tail end is located between the second inner ring sealing line and the second outer ring sealing line.

[0016] Optionally, a microporous diffusion layer is arranged between the cathode electrolysis end and the exchange film, wherein the thickness of the microporous diffusion layer ranges from 0.1 to 0.3 mm, the material of the microporous diffusion layer is carbon paper or titanium sintered layer, the pore size of the microporous diffusion layer ranges from 10 to 50 μm, a film-shaped heat-conducting layer is arranged at the contact position of the cathode electrolysis end or the anode electrolysis end and the metal plate, and the material of the film-shaped heat-conducting layer is silicon carbide or graphene.

[0017] Optionally, the sealing line and the frame are integrally injection molded, the material of the sealing line includes a base material, a filler, a vulcanizing agent, an active additive, a promoter, a lubricant, and an antioxidant, the base material includes FKM (65 phr) and TPU (35 phr), the coupling agent includes MAH (3-5 phr), the filler includes SiO2 (15 phr), the vulcanizing agent includes DCP (1-2 phr), the active additive includes TAIC (2-4 phr), the promoter includes TMPTMA (1-2 phr), the lubricant includes zinc stearate (1 phr), and the antioxidant includes antioxidant 1010 (1 phr).

[0018] The various embodiments of the present disclosure have the following beneficial effects: through the electrolytic structure applied to the electrolytic cell of some embodiments of the present disclosure, the non-catalytic area at the edge of the exchange membrane can be provided with rigid support, and the catalyst layer of the exchange membrane can be prevented from falling off and failing, thereby simplifying the assembly process of the electrolytic structure, shortening the time consumed in the assembly process, and reducing the human resources consumed. Specifically, the reason why the existing electrolytic structure has many technical problems is that the non-catalytic area at the edge of the traditional exchange membrane lacks rigid support, causing the material of the exchange membrane to easily creep and deform under high pressure, resulting in excessive hydrogen permeability and causing the catalyst layer of the exchange membrane to fall off and fail, thereby resulting in less hydrogen produced by the electrolytic structure; because the insulating sealers arranged between the traditional single stack units are in the form of a square circumscribed circle, the effective reaction area of the catalyst layer of the exchange membrane is lost to a certain extent, resulting in a low volume power density of the equipment, thereby resulting in less hydrogen produced by the electrolytic structure; because each electrolytic reaction assembly in the electrolytic structure needs to be sealed for a pair of frames, the assembly process of the electrolytic structure is complicated, resulting in a long time consumed in the assembly process and a large amount of human resources consumed. Based on this, the electrolytic structure applied to the electrolytic cell of some embodiments of the present disclosure is characterized in that the electrolytic structure includes at least two electrolytic reaction assemblies and at least one metal plate, wherein each electrolytic reaction assembly of the at least two electrolytic reaction assemblies includes a frame, a cathode electrolysis end, an anode electrolysis end, and an exchange membrane; the frame includes an inner annular structure and an outer annular structure, the inner side of the inner annular structure is connected with the cathode electrolysis end, the front surface of the inner annular structure is connected with the exchange membrane, the anode electrolysis end is connected with the exchange membrane, and the width of the inner annular structure matches the width of the non-catalytic area of the exchange membrane; the metal plate is connected between each adjacent two electrolytic reaction assemblies of the at least one electrolytic reaction assembly, one side of the metal plate is connected with the anode electrolysis end of the electrolytic reaction assembly, and the other side of the metal plate is connected with the cathode electrolysis end of the electrolytic reaction assembly; the electrolytic reaction assembly at the head end and the electrolytic reaction assembly at the tail end of the at least two electrolytic reaction assemblies are both provided with a sealing line; the back surface of the inner annular structure and the back surface of the outer annular structure are located on the same horizontal plane, and the front surface of the inner annular structure and the front surface of the outer annular structure form a stepped structure; because the stepped structure composed of the inner annular structure and the outer annular structure, and the front surface of the inner annular structure is connected with the exchange membrane, the front surface of the inner annular structure can rigidly support the exchange membrane in the electrolytic structure, thereby reducing the creep and deformation of the exchange membrane under high pressure.Because one frame can accommodate the reaction carriers of the anode electrolysis end and the cathode electrolysis end at the same time, and the sealing line design replaces the traditional insulation seal, the catalytic area of the exchange membrane is maximized by the design of the inner ring structure, thereby maximizing the space utilization of the electrolysis structure and reducing the falling and failure of the catalyst layer of the exchange membrane. Because of the design of the sealing line of the electrolysis structure, the water injection hole and the gas outlet hole do not interfere with each other, and one frame can accommodate the reaction carriers of the anode electrolysis end and the cathode electrolysis end at the same time, the metal plate is clamped between the two electrolysis reaction assemblies as a shared intermediate conductive separator, thereby simplifying the assembly process of the electrolysis structure, shortening the time consumed in the assembly process and reducing the human resources consumed. Therefore, the electrolysis structure applied to the electrolysis tank can provide rigid support for the non-catalytic area at the edge of the exchange membrane, reduce the falling and failure of the catalyst layer of the exchange membrane. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by describing in detail some embodiments thereof with reference to the attached drawings. The same or similar components have the same or similar reference numbers throughout the drawings. It should be understood that the drawings are schematic and elements and features are not necessarily to scale.

[0020] Figure 1 is an exploded structural schematic diagram of some embodiments of the electrolysis structure applied to the electrolysis tank according to the present disclosure;

[0021] Figure 2 is a frame front view of the head-end electrolysis reaction assembly according to some embodiments of the electrolysis structure applied to the electrolysis tank according to the present disclosure;

[0022] Figure 3 is a frame back view of the tail-end electrolysis reaction assembly according to some embodiments of the electrolysis structure applied to the electrolysis tank according to the present disclosure. DETAILED DESCRIPTION

[0023] Embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While the present disclosure is susceptible to various modifications and alternative forms, the present disclosure is shown by way of example in the drawings and will be described in detail hereinafter with reference to the drawings. It should be understood that the present disclosure can be implemented by various means, and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, the embodiments are provided so that this disclosure will be more thoroughly and completely understood. It should be understood that the drawings and embodiments of the present disclosure are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure.

[0024] It should also be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings. The embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0025] It should be noted that the terms "first", "second", and the like in the present disclosure are only used to distinguish different devices, modules or units, and do not limit the order or interdependence of the functions performed by these devices, modules or units.

[0026] It should be noted that the terms "one", "multiple" in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that "one or more" should be understood unless the context clearly indicates otherwise.

[0027] The names of the messages or information exchanged between the devices in the embodiments of the present disclosure are only for illustrative purposes, and are not used to limit the scope of the messages or information.

[0028] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] Figure 1 is an exploded structural schematic diagram of some embodiments of the electrolysis structure applied to the electrolytic cell according to the present disclosure. Figure 1 It can include an anode electrolysis end 130, an exchange film 140, a cathode electrolysis end 120, a frame 110, a communication hole 210 and a metal plate 200.

[0030] Figure 2 is a structural schematic diagram of some embodiments of the front frame view of the head-end electrolysis reaction assembly of the electrolysis structure applied to the electrolytic cell according to the present disclosure. Among them, Figure 2 It can include an inner ring structure 111, an outer ring structure 112, a water injection hole 150, a rounded corner 151, an air outlet hole 160 and a sealing line 300.

[0031] Figure 3 is a structural schematic diagram of some embodiments of the back frame view of the tail-end electrolysis reaction assembly of the electrolysis structure applied to the electrolytic cell according to the present disclosure. Among them, Figure 3 It can include a water injection hole 150, an air outlet hole 160, a flow guide groove 161, a flow guide column 162, an arc 163 and a sealing line 300.

[0032] In some embodiments, as Figure 1 shown, the above-mentioned electrolysis structure can include at least two electrolysis reaction assemblies and at least one metal plate 200. Among them, the number of the above-mentioned at least two electrolysis reaction assemblies can be 2, and the number of the above-mentioned at least one metal plate 200 can be one less than the number of the above-mentioned electrolysis reaction assemblies. Here, the specific number of the above-mentioned at least two electrolysis reaction assemblies and the specific number of the above-mentioned at least one metal plate 200 are not specifically limited. In use, the above-mentioned electrolysis reaction assembly can be used to produce hydrogen, and the above-mentioned metal plate 200 can be used for electrical conduction to connect adjacent electrolysis reaction assemblies.

[0033] In some embodiments, as shown in Figure 1 Each of the at least two electrolysis reaction assemblies can include a frame 110, a cathode electrolysis end 120, an anode electrolysis end 130, and an exchange film 140. The frame 110 can be made of PPSU. The cathode electrolysis end 120 and the anode electrolysis end 130 can be made of titanium. The cathode electrolysis end 120 and the anode electrolysis end 130 can be circular. The frame 110 can match the shape of the cathode electrolysis end 120 and the anode electrolysis end 130. The exchange film 140 can be a proton exchange film 140.

[0034] In some embodiments, as shown in Figure 2 The frame 110 can include an inner annular structure 111 and an outer annular structure 112. The inner side of the inner annular structure 111 can be connected to the cathode electrolysis end 120. The front of the inner annular structure 111 can be connected to the exchange film 140. The anode electrolysis end 130 can be connected to the exchange film 140. The width of the inner annular structure 111 can match the width of the non-catalytic area of the exchange film 140. The connection between the inner side of the inner annular structure 111 and the cathode electrolysis end 120, the connection between the front of the inner annular structure 111 and the exchange film 140, and the connection between the anode electrolysis end 130 and the exchange film 140 can be adhesive connection. The connection between the inner side of the inner annular structure 111 and the cathode electrolysis end 120, the connection between the front of the inner annular structure 111 and the exchange film 140, and the connection between the anode electrolysis end 130 and the exchange film 140 can be adjusted according to actual needs. It should be noted that the width of the inner annular structure 111 can be less than or equal to the width of the non-catalytic area of the exchange film 140. The adhesive connection between the anode electrolysis end and the exchange film is the non-catalytic area of the exchange film.

[0035] In some embodiments, as shown in Figure 1 and Figure 2As shown, in the at least one electrolytic reaction assembly described above, a metal plate 200 can be connected between each pair of adjacent electrolytic reaction assemblies. One side of the metal plate 200 can be connected to the anode electrolytic terminal 130 of the electrolytic reaction assembly, and the other side of the metal plate 200 can be connected to the cathode electrolytic terminal 120 of the electrolytic reaction assembly. The connection method between one side of the metal plate 200 and the anode electrolytic terminal 130 of the electrolytic reaction assembly, and between the other side of the metal plate 200 and the cathode electrolytic terminal 120 of the electrolytic reaction assembly, can be adhesive bonding. Here, the connection method between one side of the metal plate 200 and the anode electrolytic terminal 130 of the electrolytic reaction assembly, and between the other side of the metal plate 200 and the cathode electrolytic terminal 120 of the electrolytic reaction assembly, is not specifically limited and can be adjusted according to actual needs.

[0036] In some embodiments, such as Figure 2 and Figure 3 As shown, both the first and last electrolytic reaction components of the above-mentioned at least two electrolytic reaction components can be equipped with a sealing line 300.

[0037] In some embodiments, such as Figure 2 and Figure 3 As shown, the reverse side of the inner annular structure 111 can be on the same horizontal plane as the reverse side of the outer annular structure 112, and the front side of the inner annular structure 111 and the front side of the outer annular structure 112 can form a stepped structure. The stepped structure formed by the front side of the inner annular structure 111 and the front side of the outer annular structure 112 supports the non-catalytic region of the exchange membrane 140. The shape of the non-catalytic region of the exchange membrane 140 is not limited; for example, the non-catalytic region of the exchange membrane 140 can be annular.

[0038] Optionally, a metal mesh may be provided on the aforementioned anode electrolysis end 130. In use, the metal mesh supports the anode electrolysis end 130 and, through its mesh structure, reduces oxygen bubble blockage, thereby improving oxygen removal efficiency. The connection between the metal mesh and the anode electrolysis end 130 can be laser welding. The specific connection method between the metal mesh and the anode electrolysis end 130 is not specifically limited and can be adjusted according to actual needs.

[0039] Optionally, the inner annular structure 111 and the outer annular structure 112 can be integrally injection molded. The difference between the front surface of the inner annular structure 111 and the front surface of the outer annular structure 112 can be in the range of 0.4–0.6 mm. This difference in width provides good support. However, the difference in width between the front surface of the inner annular structure 111 and the outer annular structure 112 is not limited and can be adjusted according to actual needs.

[0040] Optionally, the metal plate 200 may be provided with a first group of connecting holes 210. The outer annular structure 112 may be provided with a second group of connecting holes 210. The first group of connecting holes 210 and the second group of connecting holes 210 may form a vertical fluid channel. The second connecting holes 210 within the second group of connecting holes 210 may be water injection holes 150 or air outlet holes 160. Both the air outlet holes 160 and the water injection holes 150 may be radially distributed along the frame 110. The first group of connecting holes in the metal plate 200 may be formed by boring. The second group of connecting holes in the outer annular structure 112 may be formed by integral injection molding. Here, the formation of the first group of connecting holes and the formation of the second group of connecting holes are not specifically limited and may be adjusted according to actual needs. In use, the water injection holes 150 may be symmetrically divided along any central axis of the electrolytic reaction structure, with one side of the central axis being a water injection hole 150 and the other side being a water outlet.

[0041] Optionally, a rounded corner 151 may be provided between the front side of the outer annular structure 112 and both ends of the water injection hole 150. In use, the rounded corner 151 allows the water injected into the water injection hole 150 to enter the anode electrolysis end 130 through the rounded corner 151, so that the water reacts with the catalyst layer electroplated on the exchange membrane 140.

[0042] Optionally, a flow guiding structure may be provided on the reverse side of the inner annular structure 111 adjacent to the air outlet 160. The flow guiding structure includes a predetermined number of flow guiding columns 162. A flow guiding groove 161 may be provided between each pair of adjacent flow guiding columns 162. Both ends of the flow guiding structure may be arc-shaped 163. The predetermined number of flow guiding columns 162 may be six. Here, the predetermined number of flow guiding columns 162 is not specifically limited and can be adjusted according to actual needs.

[0043] Optionally, the sealing line 300 of the electrolysis reaction component at the head end can be located on the front side of the outer annular structure 112. The sealing line 300 of the electrolysis reaction component at the tail end can be located on the back side of the inner annular structure 111.

[0044] Optionally, the electrolysis structure is an integrated packaging structure, the sealing line 300 of the electrolysis reaction component at the head end can include a first inner circle sealing line 300 located at the inner circle of the outer annular structure 112 and a first outer circle sealing line 300 located at the outer circle of the outer annular structure 112. The sealing line 300 of the electrolysis reaction component at the tail end can include a second outer circle sealing line 300 located at the outer circle of the outer annular structure 112 and a second inner circle sealing line 300 located at the inner circle of the inner annular structure 111. The gas outlet hole 160 of the electrolysis reaction component at the head end can be located between the first inner circle sealing line 300 and the first outer circle sealing line 300. The water inlet hole 150 of the electrolysis reaction component at the head end can be located inside the first inner circle sealing line 300. The gas outlet hole 160 of the electrolysis reaction component at the tail end can be located inside the second inner circle sealing line 300. The water inlet hole 150 of the electrolysis reaction component at the tail end can be located between the second inner circle sealing line 300 and the second outer circle sealing line 300. In the electrolysis reaction component at the head end, the gas outlet hole 160 is located between the first inner circle sealing line 300 and the first outer circle sealing line 300, and the water inlet hole 150 is located inside the first inner circle sealing line 300, so that the hydrogen gas discharged from the gas outlet hole 160 of the electrolysis reaction component at the head end can be isolated by the first inner circle sealing line 300 and the first outer circle sealing line 300, and the hydrogen gas discharged from the gas outlet hole 160 can be isolated from the liquid and oxygen discharged from the water inlet hole 150. In the electrolysis reaction component at the tail end, the gas outlet hole 160 is located inside the second inner circle sealing line 300, and the water inlet hole 150 is located between the second inner circle sealing line 300 and the second outer circle sealing line 300, so that the hydrogen gas discharged from the gas outlet hole 160 of the electrolysis reaction component at the tail end can be isolated by the second inner circle sealing line 300, and the hydrogen gas discharged from the gas outlet hole 160 can be isolated from the liquid and oxygen discharged from the water inlet hole 150. The electrolysis structure can package at least two electrolysis reaction devices at one time, thereby increasing the effective area of the electrolysis structure.

[0045] In the process of adopting technical solutions to solve the above technical problems, the following technical problem two is often accompanied: in the case of high-power hydrogen production of multi-layer stacked structure, due to the increase of hydrogen production of multi-layer stacked structure cathode, part of the hydrogen accumulation in the catalytic area, resulting in the decrease of effective reaction area utilization, and the hydrogen production potential of multi-layer stacking cannot be fully utilized, thereby resulting in less hydrogen produced by electrolytic structure; In the case of long-time running of electrolytic structure, since the electrolytic reaction assembly is directly in contact with the metal plate, the equipment is prone to local overheating, resulting in low working efficiency of electrolytic structure, and the hydrogen production potential of multi-layer stacking cannot be fully utilized, thereby resulting in less hydrogen produced by electrolytic structure. In view of the above technical problem two, the conventional solution is generally: the metal plate is internally designed with independent cooling cavity, cooling liquid is introduced, and the number of flow guide slots is increased. However, the inventors consider that the design of independent cooling cavity in the metal plate, the introduction of cooling liquid and the increase of the number of flow guide slots will cause the formation of cavity in the plate, thereby reducing the strength. Combined with the advantages of the electrolytic structure of the electrolytic cell owned by the company where the inventors are located, the following solution is adopted:

[0046] Optionally, a microporous diffusion layer is arranged between the cathode electrolysis end 120 and the exchange membrane 140. The thickness of the microporous diffusion layer can be 0.1-0.3 mm. The material of the microporous diffusion layer can be carbon paper or sintered titanium plate. The pore size of the microporous diffusion layer can be 10-50 μm. The contact between the cathode electrolysis end 120 or the anode electrolysis end 130 and the metal plate 200 can be provided with a film-shaped heat-conducting layer. The material of the film-shaped heat-conducting layer can be silicon carbide or graphene. The connection between the microporous diffusion layer and the cathode electrolysis end 120 can be laser welding. The connection between the film-shaped heat-conducting layer and the cathode electrolysis end 120 or the anode electrolysis end 130, and the connection between the film-shaped heat-conducting layer and the metal plate 200 can be glue bonding. The shape of the microporous diffusion layer can be a net structure. In this regard, the shape of the microporous diffusion layer is not limited, and can be adjusted according to actual needs. In this regard, the specific connection between the microporous diffusion layer and the cathode electrolysis end 120, the film-shaped heat-conducting layer and the cathode electrolysis end 120 or the anode electrolysis end 130, and the film-shaped heat-conducting layer and the metal plate 200 is not limited, and can be adjusted according to actual needs. In use, the microporous diffusion layer can homogenize the current density and accelerate the escape of hydrogen, and the film-shaped heat-conducting layer can uniformly cool the metal plate 200 to prevent local overheating caused by local overload. The thickness of the microporous diffusion layer can be 0.1-0.3 mm, which can not affect the electrolytic reaction assembly. The pore size of the microporous diffusion layer can be 10-50 μm, which can have good diffusion and support effect. In this regard, the thickness of the microporous diffusion layer and the pore size of the microporous diffusion layer are not limited, and can be adjusted according to actual needs.

[0047] The optional embodiment above solves the second technical problem of causing hydrogen accumulation in part of the catalytic area, resulting in a decrease in the utilization rate of the effective reaction area, and the device is prone to local overheating, resulting in low working efficiency of the electrolysis structure. The specific factors that cause the electrolysis structure device applied to the electrolytic cell to be prone to hydrogen accumulation in part of the catalytic area, resulting in a decrease in the utilization rate of the effective reaction area, and the device is prone to local overheating, resulting in low working efficiency of the electrolysis structure are as follows: In the case of high-power hydrogen production of a multi-layer stacked structure, due to the increase in hydrogen production of the cathode of the multi-layer stacked structure, hydrogen accumulates in part of the catalytic area, resulting in a decrease in the utilization rate of the effective reaction area, which cannot fully utilize the hydrogen production potential of the multi-layer stacking, thereby resulting in less hydrogen produced by the electrolysis structure; In the case of long-time operation of the electrolysis structure, since the electrolysis reaction assembly is directly in contact with the metal plate, the device is prone to local overheating, resulting in low working efficiency of the electrolysis structure, which cannot fully utilize the hydrogen production potential of the multi-layer stacking, thereby resulting in less hydrogen produced by the electrolysis structure. If the above factors are solved, the hydrogen accumulation in the electrolysis structure device applied to the electrolytic cell can be reduced, the effective reaction area can be efficiently utilized, and the local overheating of the device can be reduced. In order to achieve this effect, the micro-control diffusion layer of the embodiment of the present disclosure uses carbon paper or sintered titanium plate as the stable conductive material, and the thickness range can be 0.1-0.3mm to not affect the original electrolysis structure, and the pore size range can be 10-50μm to effectively avoid hydrogen accumulation, thereby reducing the hydrogen accumulation in part of the catalytic area and enhancing the utilization rate of the effective reaction area. The material of the film-shaped heat-conducting layer is silicon carbide or graphene, which can effectively reduce the local overheating.

[0048] In the process of using the technical solution to solve the above technical problem, the following technical problem three often accompanies: in the case of high pressure of gas accumulation in the electrolysis process, due to the external pressure, gaps appear in the soft sealing element, resulting in hydrogen leakage. In view of the above technical problem three, the conventional solution is generally: the use of soft sealing element stacking. The inventor considers the shortcomings of only using soft sealing element stacking. Combined with the advantages of the company where the inventor is located in the field of electrolysis structure applied to electrolytic cell, we decide to use the following solution:

[0049] Optionally, the sealing line 300 and the frame 110 can be integrally injection molded, and the sealing line 300 can include a base material, a filler, a vulcanizing agent, an active auxiliary agent, an accelerator, a lubricant, and an antioxidant. The base material can include fluoroelastomer FKM (65 phr) and thermoplastic polyurethane TPU (35 phr). The coupling agent can include maleic anhydride MAH (3-5 phr). The filler can include silicon dioxide SiO2 (15 phr). The vulcanizing agent can include dicumyl peroxide DCP (1-2 phr). The active auxiliary agent can include triallyl isocyanurate TAIC (2-4 phr). The accelerator can include trimethylolpropane trimethacrylate TMPTMA (1-2 phr). The lubricant can include zinc stearate (1 phr). The antioxidant can include antioxidant 1010 (1 phr). As shown in Table 1, Table 1 can include each sealing line prepared by proportioning and combining the fluoroelastomer FKM (65 phr), the thermoplastic polyurethane TPU (35 phr), the maleic anhydride MAH (3-5 phr), the silicon dioxide SiO2 (15 phr), the dicumyl peroxide DCP (1-2 phr), the triallyl isocyanurate TAIC (2-4 phr), the trimethylolpropane trimethacrylate TMPTMA (1-2 phr), the zinc stearate (1 phr), and the antioxidant 1010 (1 phr). Among them, the fluoroelastomer FKM accounts for 65 parts per 100 parts of the base material, the thermoplastic polyurethane TPU accounts for 35 parts per 100 parts of the base material, and the fluoroelastomer FKM and the thermoplastic polyurethane TPU are combined to form the base material. The proportioning of the maleic anhydride MAH is that 3-5 parts of the maleic anhydride MAH are added per 100 parts of the base material combined by the fluoroelastomer FKM and the thermoplastic polyurethane TPU, and the maleic anhydride MAH is a coupling agent. The proportioning of the silicon dioxide SiO2 is that 15 parts of the silicon dioxide SiO2 are added per 100 parts of the base material combined by the fluoroelastomer FKM and the thermoplastic polyurethane TPU, and the silicon dioxide SiO2 is a filler. The proportioning of the dicumyl peroxide DCP is that 1-2 parts of the dicumyl peroxide DCP are added per 100 parts of the base material combined by the fluoroelastomer FKM and the thermoplastic polyurethane TPU, and the dicumyl peroxide DCP is a vulcanizing agent. The proportioning of the triallyl isocyanurate TAIC is that 2-4 parts of the triallyl isocyanurate TAIC are added per 100 parts of the base material combined by the fluoroelastomer FKM and the thermoplastic polyurethane TPU, and the triallyl isocyanurate TAIC is an active auxiliary agent.The ratio of the trimethylolpropane trimethacrylate TMPTMA is 1-2 parts of the trimethylolpropane trimethacrylate TMPTMA in 100 parts of the base material composed of the fluororubber FKM and the thermoplastic polyurethane TPU, and the trimethylolpropane trimethacrylate TMPTMA is a promoter. The ratio of the zinc stearate is 1 part of the zinc stearate in 100 parts of the base material composed of the fluororubber FKM and the thermoplastic polyurethane TPU, and the zinc stearate is a lubricant. The ratio of the antioxidant 1010 is 1 part of the antioxidant 1010 in 100 parts of the base material composed of the fluororubber FKM and the thermoplastic polyurethane TPU, and the antioxidant 1010 is an antioxidant. It should be noted that the specific proportion of each material used in the preparation of the sealing line 300 can improve the performance of the prepared sealing line 300 in terms of high temperature resistance, high pressure resistance, chemical corrosion resistance and strength.

[0050] Optionally, the material preparation process of the sealing line 300 is as follows:

[0051] First step (material preparation): fluororubber FKM (65 phr), thermoplastic polyurethane TPU (35 phr), maleic anhydride MAH (3-5 phr), silicon dioxide SiO2 (15 phr), dicumyl peroxide DCP (1-2 phr), triallyl isocyanurate TAIC (2-4 phr), trimethylolpropane trimethacrylate TMPTMA (1-2 phr), zinc stearate (1 phr), antioxidant 1010 (1 phr) are prepared in advance.

[0052] Second step (Banbury processing): the fluororubber FKM can be added to the Banbury mixer to process the fluororubber FKM. The temperature of the Banbury mixer is controlled below 95°C, which can reduce the pre-crosslinking, and the total time of the Banbury processing is about 3 minutes.

[0053] Third step (mixing process) : first, the fluororubber FKM material after the above mixing process is taken out, and the above thermoplastic polyurethane TPU and the fluororubber FKM material after the mixing process are added to the open mill for about 2 minutes of plasticizing to form a mixed base material. Then, the above silica SiO2 and the above zinc stearate are evenly divided into two parts, and the two parts of the obtained material are added to the above open mill according to a preset time interval, which can be 2 minutes, so that the base material in the above open mill is fully wetted. Then, the above maleic anhydride MAH is added to the above open mill in a small amount and multiple times to achieve uniform dispersion of the maleic anhydride MAH during the mixing process. The temperature of the above open mill can be controlled at about 60℃, and the plasticizing time is about 3 minutes. Then, the above dicumyl peroxide DCP, the above triallyl isocyanurate TAIC, the above trimethylolpropane trimethacrylate TMPTMA and the above antioxidant 1010 are added in turn. Then, the open mill starts to process, and the temperature range of the open mill during the mixing process can be controlled at 50-70℃ to reduce filler agglomeration, keep the surface of the rubber uniform and not sticky. Here, the time for the open mill process is not specifically limited, and can be adjusted according to actual needs, as long as the surface of the rubber is uniform and not sticky. Finally, the rubber is immediately discharged to avoid presulfurization.

[0054] Fourth step (vulcanization stage) : the vulcanization process can be divided into mold main vulcanization and two-stage post-vulcanization. The material is placed in a mold for mold main vulcanization operation, and the temperature of the mold is raised to 160℃ for tabletting, and the pressure used for tabletting can be in the range of 10-15 MPa, and the tablet thickness can be in the range of 4-6 mm. The specific shape of the mold used is not limited, and can be adjusted according to actual needs. The time can be controlled at 10-15 minutes (which can be appropriately adjusted according to the tablet thickness). The material after mold main vulcanization is taken out for two-stage post-vulcanization, which can use a gradual temperature rise air blowing vulcanization operation to obtain the material after air blowing vulcanization operation. (It should be noted that during the air blowing vulcanization operation, first, the temperature is controlled at 200℃ for 2h, and then the temperature is raised to 220℃ for 2-4h. The total time is about 4-8 hours), which can eliminate residues, strengthen the crosslinking network and improve the compression recovery performance.

[0055] Fifth step (post-processing stage) : the obtained material can be trimmed and deburred to obtain a sealing line material.

[0056] Step 6 (performance test stage): performance test is conducted on the obtained sealing line material, and the sealing line that passes the performance test is determined as the prepared sealing line. Table 2 can include the performance test results of each sealing line in Table 1. The performance test results can include the Shore A hardness of the sealing ring, the hardness after aging (h), the compression permanent set (%), the elongation at break (%), and the elongation at break after aging (%).

[0057]

[0058] Table 1

[0059]

[0060] Table 2

[0061] The optional embodiment described above is one of the inventive points of the embodiments of the present disclosure, and solves the technical problem three of causing the gap in the soft sealing member, resulting in hydrogen leakage. The specific factors that cause the electrolytic structure device applied to the electrolytic cell to be prone to the situation of causing the gap in the soft sealing member, resulting in hydrogen leakage, are as follows: under the condition of high pressure of gas accumulation in the electrolysis process, due to the external pressure, the gap in the soft sealing member is caused, resulting in the situation of hydrogen leakage. If the above factors are solved, the situation of hydrogen leakage of the electrolytic structure device applied to the electrolytic cell under high pressure environment can be reduced. In order to achieve this effect, the embodiments of the present disclosure use a new type of soft sealing material to prepare the sealing line. Because the vulcanizing agent (dicumyl peroxide DCP) is used, the sealing line can maintain elasticity and sealing property under high pressure and high temperature environment. Because the active auxiliary agent (triallyl isocyanurate TAIC) is used, the durability and stability of the material can be significantly improved. Because the accelerator (trimethylolpropane trimethylacrylate TMPTMA) is used, the corrosion resistance, aging resistance, hardness and heat resistance of the product can be enhanced. Because the antioxidant 1010 is used, the aging resistance of the high molecular parts such as plastics and rubbers can be ensured. The comprehensive use of the above materials can significantly improve the comprehensive performance of the composite material, especially in terms of high temperature resistance, high pressure resistance, chemical corrosion resistance and strength, and has a wide application prospect.

[0062] The various embodiments of the present disclosure have the following beneficial effects: through the electrolytic structure applied to the electrolytic cell of some embodiments of the present disclosure, the non-catalytic area at the edge of the exchange membrane can be provided with rigid support, and the catalyst layer of the exchange membrane can be prevented from falling off and failing, thereby simplifying the assembly process of the electrolytic structure, shortening the time consumed in the assembly process, and reducing the human resources consumed. Specifically, the reason why the existing electrolytic structure has many technical problems is that the non-catalytic area at the edge of the traditional exchange membrane lacks rigid support, causing the material of the exchange membrane to easily creep and deform under high pressure, resulting in excessive hydrogen permeability and causing the catalyst layer of the exchange membrane to fall off and fail, thereby resulting in less hydrogen produced by the electrolytic structure; because the insulating sealers arranged between the traditional single stack units are in the form of a square circumscribed circle, the effective reaction area of the catalyst layer of the exchange membrane is lost to a certain extent, resulting in a low volume power density of the equipment, thereby resulting in less hydrogen produced by the electrolytic structure; because each electrolytic reaction assembly in the electrolytic structure needs to be sealed for a pair of frames, the assembly process of the electrolytic structure is complicated, resulting in a long time consumed in the assembly process and a large amount of human resources consumed. Based on this, the electrolytic structure applied to the electrolytic cell of some embodiments of the present disclosure is characterized in that the electrolytic structure includes at least two electrolytic reaction assemblies and at least one metal plate, wherein each electrolytic reaction assembly of the at least two electrolytic reaction assemblies includes a frame, a cathode electrolysis end, an anode electrolysis end, and an exchange membrane; the frame includes an inner annular structure and an outer annular structure, the inner side of the inner annular structure is connected with the cathode electrolysis end, the front surface of the inner annular structure is connected with the exchange membrane, the anode electrolysis end is connected with the exchange membrane, and the width of the inner annular structure matches the width of the non-catalytic area of the exchange membrane; the metal plate is connected between each adjacent two electrolytic reaction assemblies of the at least one electrolytic reaction assembly, one side of the metal plate is connected with the anode electrolysis end of the electrolytic reaction assembly, and the other side of the metal plate is connected with the cathode electrolysis end of the electrolytic reaction assembly; the electrolytic reaction assembly at the head end and the electrolytic reaction assembly at the tail end of the at least two electrolytic reaction assemblies are both provided with a sealing line; the back surface of the inner annular structure and the back surface of the outer annular structure are located on the same horizontal plane, and the front surface of the inner annular structure and the front surface of the outer annular structure form a stepped structure; because the stepped structure composed of the inner annular structure and the outer annular structure, and the front surface of the inner annular structure is connected with the exchange membrane, the front surface of the inner annular structure can rigidly support the exchange membrane in the electrolytic structure, thereby reducing the creep and deformation of the exchange membrane under high pressure.Also because one frame can simultaneously accommodate the reaction carriers of the anode electrolysis end and the cathode electrolysis end, and the sealing line design replaces the traditional insulation seal, the catalytic area of the above-mentioned exchange film is maximized by the design of the above-mentioned inner ring structure, thereby maximizing the space utilization of the above-mentioned electrolysis structure and reducing the shedding and failure of the actual exchange film catalyst layer. Also because of the sealing line design of the above-mentioned electrolysis structure, the water injection hole and the gas outlet hole are realized to be non-interfering, and one frame can simultaneously accommodate the reaction carriers of the anode electrolysis end and the cathode electrolysis end, the metal plate is clamped between the two electrolysis reaction assemblies as a shared intermediate conductive separator, thereby simplifying the assembly process of the electrolysis structure, shortening the time consumed in the assembly process and reducing the human resources consumed. Therefore, the electrolysis structure applied to the electrolysis tank can provide rigid support for the non-catalytic area at the edge of the above-mentioned exchange film, reduce the shedding and failure of the catalyst layer of the above-mentioned exchange film. The above description is only some of the preferred embodiments of the present disclosure and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the application involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features disclosed in the embodiments of the present disclosure (but not limited to) having similar functions to form technical solutions.

Claims

1. An electrolytic structure for use in an electrolytic cell, characterized in that, The electrolysis structure includes at least two electrolysis reaction components and at least one metal plate, wherein, Each of the at least two electrolysis reaction components includes a frame, a cathode electrolysis terminal, an anode electrolysis terminal, and an exchange membrane; The frame includes an inner annular structure and an outer annular structure. The inner side of the inner annular structure is connected to the cathode electrolysis terminal, and the front side of the inner annular structure is connected to the exchange membrane. The anode electrolysis terminal is connected to the exchange membrane, and the width of the inner annular structure matches the width of the non-catalytic region of the exchange membrane. A metal plate is connected between each pair of adjacent electrolytic reaction components in the at least one electrolytic reaction component. One side of the metal plate is connected to the anode electrolytic terminal of the electrolytic reaction component, and the other side of the metal plate is connected to the cathode electrolytic terminal of the electrolytic reaction component. Both the first and last electrolytic reaction components of the at least two electrolytic reaction components are equipped with sealing lines. The reverse side of the inner ring structure and the reverse side of the outer ring structure are located on the same horizontal plane, and the front side of the inner ring structure and the front side of the outer ring structure form a stepped structure.

2. The electrolytic structure according to claim 1, characterized in that, A metal mesh is provided on the anode electrolysis end.

3. The electrolytic structure according to claim 1, characterized in that, The inner annular structure and the outer annular structure are manufactured by integral injection molding, and the difference between the front surface of the inner annular structure and the front surface of the outer annular structure is in the range of 0.4 to 0.6 mm.

4. The electrolytic structure according to claim 1, characterized in that, The metal plate is provided with a first group of connecting holes, and the outer annular structure is provided with a second group of connecting holes. The first group of connecting holes and the second group of connecting holes form a vertical fluid channel. The second connecting hole in the second group of connecting holes is a water injection hole or an air outlet hole. The air outlet hole and the water injection hole are both radially distributed along the frame.

5. The electrolytic structure according to claim 4, characterized in that, The outer annular structure has rounded corners between its front side and both ends of the water injection hole.

6. The electrolytic structure according to claim 4, characterized in that, A flow guiding structure is provided on the reverse side of the inner annular structure adjacent to the air outlet. The flow guiding structure includes a preset number of flow guiding columns. There is a flow guiding groove between each pair of adjacent flow guiding columns. Both ends of the flow guiding structure are arc-shaped.

7. The electrolytic structure according to claim 1, characterized in that, The sealing line of the electrolytic reaction component at the first end is located on the front side of the outer annular structure, and the sealing line of the electrolytic reaction component at the tail end is located on the back side of the inner annular structure.

8. The electrolytic structure according to claim 7, characterized in that, The electrolytic structure is an integrally packaged structure. The sealing line of the electrolytic reaction component at the first end includes a first inner ring sealing line located on the inner ring of the outer annular structure and a first outer ring sealing line located on the outer ring of the outer annular structure. The sealing line of the electrolytic reaction component at the tail end includes a second outer ring sealing line located on the outer ring of the outer annular structure and a second inner ring sealing line located on the inner ring of the inner annular structure. The vent of the electrolytic reaction component at the first end is located between the first inner ring sealing line and the first outer ring sealing line. The water injection hole of the electrolytic reaction component at the first end is located inside the first inner ring sealing line. The vent of the electrolytic reaction component at the tail end is located inside the second inner ring sealing line. The water injection hole of the electrolytic reaction component at the tail end is located between the second inner ring sealing line and the second outer ring sealing line.

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