Electrolytic cell device

Abstract

The present application relates to an electrolytic cell device, which includes electrode plates and membrane electrodes. Gaskets are respectively laid on both side surfaces of the membrane electrodes. Each gasket, the membrane electrode and the electrode plate enclose an electrolytic chamber. A sealing ring is located between every two adjacent electrode plates. The first sealing portion of the sealing ring is clamped between the electrode plate and the gasket to seal the electrolytic chamber. The second sealing portion of the sealing ring extends from the first sealing portion to the end of the gasket to abut against the gasket, which can not only re-seal the first sealing portion, but also seal the gap between the gasket and the membrane electrode, improving the sealing effect of the electrolytic cell under high-pressure environment. The second sealing portion also realizes the support of the gasket, and can effectively support the gasket and the membrane electrode from the side, effectively preventing the electrolytic cell from deforming due to internal high pressure and deforming under gravity when arranged horizontally, further improving the internal structural strength and sealing performance of the electrolytic cell, and enhancing the adaptability of the electrolytic cell under internal and external high-pressure environments.

Description

Technical Field

[0001] The present application relates to the field of water electrolysis and relates to an electrolytic cell device. Background Art

[0002] In the field of water electrolysis, an electrolytic cell is usually used to electrolyze water to produce hydrogen and oxygen. The electrolytic cell consists of a cell body, an anode, a cathode, and a diaphragm. The diaphragm is arranged between the anode and the cathode to separate the anode chamber and the cathode chamber. An electrolytic solution is added to the electrolytic cell. When direct current passes through the electrolytic cell, an oxidation reaction occurs at the interface between the anode and the solution, and a reduction reaction occurs at the interface between the cathode and the solution to produce the required gas.

[0003] In the prior art, the anode chamber and the cathode chamber in the electrolytic cell are usually sealed only by a single rubber ring. On the one hand, due to the simple structure and soft material of the traditional rubber ring, it is difficult to adapt to a high-pressure environment. It is easy to deform under long-term high-pressure use, resulting in seal failure and affecting the service life of the electrolytic cell. On the other hand, the chemical reaction inside the electrolytic cell will generate internal force to form a high-pressure environment inside the electrolytic cell, causing the internal structure of the electrolytic cell to be easily loosened under the influence of high pressure, affecting the sealing effect and the stability of the structure. On the other hand, the electrolytic cell is usually composed of multiple electrode plates and membrane electrodes arranged horizontally in a stacked manner. The electrode plates are easily deformed under the action of their own gravity for a long time, especially the electrode plate wings in the middle position sag, causing the electrolytic cell to have a downward curved arc deformation, which not only affects the sealing effect but also easily leads to the damage of the electrolytic cell. Therefore, the traditional sealing groove structure is difficult to meet the sealing and strength requirements under high-pressure environments. Summary of the Invention

[0004] In order to solve or at least partially solve the above technical problems, the present application provides an electrolytic cell device, including:

[0005] At least two oppositely arranged electrode plates;

[0006] A membrane electrode located between every two adjacent electrode plates;

[0007] Gaskets respectively laid on both side surfaces of the membrane electrode, and each gasket, the membrane electrode, and the electrode plate enclose an electrolytic chamber;

[0008] A sealing ring located between every two adjacent electrode plates. The sealing ring includes a first sealing portion and a second sealing portion. Among them, the first sealing portion is clamped between the electrode plate and the gasket to seal the electrolytic chamber, and the second sealing portion extends from the first sealing portion to the end of the gasket to abut against the gasket.

[0009] Optionally, the second sealing portion is seamlessly connected to the two first sealing portions on both sides of the gasket and is wound around the outer side of the end of the gasket to surround the gasket and the membrane electrode. The second sealing portion is used to seal the gaps between the first sealing portion and the gasket, and between the gasket and the membrane electrode.

[0010] Optionally, a fitting structure is formed between each side of the second sealing portion and the electrode plate, and the fitting structures on both sides of the second sealing portion are arranged in pairs.

[0011] Optionally, the fitting structure includes a groove formed on the surface of the electrode plate and an elastic protrusion formed on the surface of the second sealing portion. The elastic protrusion is fitted into the groove to seal the gap between the second sealing portion and the electrode plate and can limit the position of the second sealing portion.

[0012] Optionally, the fitting structure further includes a protrusion formed on one side of the groove. The protrusion protrudes from the surface of the electrode plate facing the second sealing portion to limit the position of the elastic protrusion.

[0013] Optionally, a plurality of the grooves and the protrusions are respectively provided, and each of the grooves and each of the protrusions are wound around the surface of the electrode plate for one week to form a closed loop;

[0014] A plurality of the elastic protrusions are provided corresponding to the grooves, and each of the elastic protrusions is wound around the surface of the second sealing portion for one week to form a closed loop.

[0015] Optionally, the electrolytic cell device includes at least three of the electrode plates and at least two of the sealing rings. The grooves on both sides of the same electrode plate are arranged staggeredly, the protrusion is formed on the back side of each groove, and the elastic protrusions of the sealing rings on both sides of the same electrode plate are arranged staggeredly.

[0016] Optionally, the sealing ring further includes a third sealing portion. The third sealing portion is seamlessly connected to the end of the second sealing portion and surrounds the second sealing portion. The third sealing portion is located between every two adjacent electrode plates, and a support member is provided inside the third sealing portion. The hardness of the support member is greater than the hardness of the third sealing portion.

[0017] Optionally, a receiving groove is formed on the surface of the third sealing portion away from the second sealing portion. The receiving groove is wound around the third sealing portion for one week to form a closed loop, and the support member is arranged in the receiving groove and surrounds the second sealing portion.

[0018] Optionally, corresponding card holes are respectively formed on the gasket and the membrane electrode;

[0019] The electrolytic cell device further includes a clamping block, which can be correspondingly clamped into the clamping holes of the gasket and the membrane electrode to limit the membrane electrode and the gasket.

[0020] Optionally, a channel penetrating the electrolytic cell device is provided in the area of the first sealing portion, and a through hole communicating the channel with the electrolytic chamber is provided on the gasket; wherein, the channel includes a water channel and a gas channel, and the through hole includes a water through hole and a gas through hole;

[0021] The electrolytic chamber is respectively communicated with the water channel through the water through hole and with the gas channel through the gas through hole.

[0022] Optionally, the membrane electrode includes a diaphragm and a diffusion layer on the surface of the diaphragm, the diffusion layer is located in the electrolytic chamber, and the diffusion layer includes titanium felt and / or carbon paper.

[0023] The electrolytic cell device provided by the present application forms a laminated structure through the electrode plate, the gasket and the membrane electrode. The gasket, the membrane electrode and the electrode plate enclose an electrolytic chamber. A sealing ring is arranged between two electrode plates. Among them, the first sealing portion of the sealing ring is clamped between the electrode plate and the gasket to seal the electrolytic chamber. The second sealing portion of the sealing ring extends from the first sealing portion to the end of the gasket to abut against the gasket, which can not only re-seal the first sealing portion, but also seal the gap between the gasket and the membrane electrode, improving the sealing effect of the electrolytic cell under high-pressure environment. The second sealing portion also realizes the support of the gasket, can effectively support the gasket and the membrane electrode from the side, effectively prevent the electrolytic cell from deforming due to internal high pressure and deforming due to gravity when arranged horizontally, further improving the internal structural strength and sealing performance of the electrolytic cell, and enhancing the adaptability of the electrolytic cell under internal and external high-pressure environments. Description of the Drawings

[0024] In order to more clearly illustrate the implementation manners of the present application, the relevant drawings will be briefly introduced below. It can be understood that the drawings described below are only used to illustrate some implementation manners of the present application, and those of ordinary skill in the art can also obtain many other technical features and connection relationships not mentioned in this text based on these drawings.

[0025] Figure 1 It is a structural schematic diagram of the electrolytic cell device of the present application;

[0026] Figure 2 It is an exploded schematic diagram of the electrolytic cell device of the present application;

[0027] Figure 3 It is an exploded schematic diagram of the internal structure of the sealing ring of the electrolytic cell device of the present application;

[0028] Figure 4 is Figure 1Schematic cross-sectional view at A-A;

[0029] Figure 5 is Figure 4 the enlarged view of part B in ;

[0030] Figure 6 is Figure 4 the enlarged view of part C in ;

[0031] Figure 7 is the schematic diagram of the partial sectional structure of the electrolytic cell device of the present application;

[0032] Figure 8 is the schematic diagram of the electrode plate of the electrolytic cell device of the present application;

[0033] Figure 9 is the schematic diagram of the sealing ring of the electrolytic cell device of the present application;

[0034] Figure 10 is Figure 9 the schematic cross-sectional view at D-D in ;

[0035] Figure 11 is the schematic diagram of the support member of the electrolytic cell device of the present application;

[0036] Figure 12 is the schematic diagram of the washer of the electrolytic cell device of the present application;

[0037] Figure 13 is the schematic diagram of the diaphragm of the electrolytic cell device of the present application.

[0038] Explanation of reference numerals:

[0039] 10. Electrode plate; 101. Groove; 102. Protrusion;

[0040] 20. Membrane electrode; 21. Diaphragm; 22. Carbon paper; 23. Titanium felt;

[0041] 30. Washer; 31. Comb tooth part; 311. Through hole; 32. Card hole; 33. Card block;

[0042] 40. Sealing ring; 41. First sealing part; 42. Second sealing part; 421. Elastic protrusion; 43. Third sealing part; 431. Accommodating groove; 432. Support member;

[0043] 50. Electrolytic chamber;

[0044] 60. Channel;

[0045] 70. Positioning hole. Detailed implementation manner

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0049] The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings in the embodiments of the present application.

[0050] As Figure 1 shown, this embodiment provides an electrolytic cell device, which includes electrode plates 10 and a membrane electrode 20. The membrane electrode 20 is located between the two electrode plates 10. A gasket 30 is also provided between the membrane electrode 20 and the electrode plates 10. The gasket 30 has a certain thickness. After the gasket 30 contacts the membrane electrode 20 and the electrode plates 10, the internal spaces of the electrode plates 10, the membrane electrode 20, and the gasket 30 enclose an electrolytic chamber 50.

[0051] In this embodiment, the gaskets 30 are respectively laid on the two side surfaces of the membrane electrode 20 to form electrolytic chambers 50 on both sides of the membrane electrode 20. Among them, the electrode plates 10 on both sides of the membrane electrode 20 are respectively an anode plate and a cathode plate, so that the electrolytic chamber 50 is divided into an anode chamber and a cathode chamber. An electrolyte is introduced into the anode chamber and the cathode chamber. After the anode plate and the cathode plate are energized, oxidation reactions and reduction reactions occur in the electrolytic chamber 50 respectively to produce the required gas.

[0052] As Figure 2 and Figure 3 shown, in this embodiment, the gasket 30 has substantially the same outer frame shape as the membrane electrode 20, so that the gasket 30 and the membrane electrode 20 can be closely overlapped to form a laminated structure. The inside of the gasket 30 is hollowed out, and the hollowed-out part corresponds to the middle working part of the membrane electrode 20 for forming the electrolytic chamber 50.

[0053] This embodiment is also provided with a sealing ring 40. The sealing ring 40 can surround the outer frame of the gasket 30 and the membrane electrode 20, and can effectively fix and limit the gasket 30 and the membrane electrode 20. At the same time, the sealing ring 40 is sandwiched between the two electrode plates 10 and can effectively seal the electrolytic chamber 50.

[0054] As Figures 4 to 6 shown, in the embodiment of the present application, the structure of the sealing ring 40 is particularly designed. The sealing ring 40 has a first sealing portion 41 and a second sealing portion 42. The first sealing portion 41 is located at the inner ring part of the sealing ring 40. The first sealing portion 41 is sandwiched between the electrode plate 10 and the gasket 30 and is laid around the surface of the gasket 30, which can seal the periphery of the electrolytic chamber 50 and achieve the effect of the first layer of sealing of the sealing ring 40.

[0055] The second sealing portion 42 of this embodiment is sandwiched between two adjacent electrode plates 10, and the second sealing portion 42 extends from the first sealing portion 41 to the end of the gasket 30. The second sealing portion 42 can abut against the gasket 30 from the side of the gasket 30. Thus, the first sealing portion 41 and the second sealing portion 42 contact the gasket 30 from two different directions. Under the action of the first sealing portion 41 to seal the electrolytic chamber 50, the second sealing portion 42 can re-seal the first sealing portion 41 and can also seal the gap between the gasket 30 and the membrane electrode 20, further improving the sealing effect.

[0056] The second sealing portion 42 of this embodiment can abut against the first sealing portion 41 and the gasket 30 under the clamping of the two electrode plates 10, and can effectively support the first sealing portion 41, the gasket 30 and the membrane electrode 20 from the side, preventing the lateral movement of the first sealing portion 41 and the gasket 30, effectively preventing the influence of the high-pressure environment generated by the internal chemical reaction of the electrolytic cell device on the internal structure, and also preventing the electrolytic cell from deforming due to its own gravity when arranged horizontally, improving the internal structural strength and sealing performance of the electrolytic cell, and enhancing the adaptability of the electrolytic cell to the internal and external high-pressure environments.

[0057] As Figure 9 and Figure 10 shown, the sealing ring 40 of this embodiment is used for sealing the anode chamber and the cathode chamber at the same time. Therefore, the inner ring part of a sealing ring 40 has two oppositely arranged first sealing portions 41, and the two first sealing portions 41 respectively correspond to the anode chamber and the cathode chamber. The second sealing portion 42 of this embodiment is integrally formed with the first sealing portion 41, the second sealing portion 42 is seamlessly connected to the two first sealing portions 41 on both sides of the gasket 30, and the second sealing portion 42 is wound around the outside of the end of the gasket 30 to surround the gasket 30 and the membrane electrode 20.

[0058] Please refer to Figure 5 、 Figure 9 and Figure 10 , the two first sealing portions 41 and the second sealing portion 42 enclose a groove with an opening facing the center of the sealing ring 40. The two gaskets 30 clamp the membrane electrode 20, and their ends are exactly in this groove. That is, the two first sealing portions 41 and the second sealing portion 42 surround the peripheries of the two gaskets 30. The second sealing portion 42 can seal the gap between the first sealing portion 41 and the gasket 30, as well as the gap between the gasket 30 and the membrane electrode 20, further improving the sealing effect; and the second sealing portion 42 surrounds the gasket 30 and the membrane electrode 20 circumferentially under the clamping of the electrode plate 10, making the structures of the gasket 30 and the membrane electrode 20 more stable, capable of well resisting the pressure changes occurring in the electrolytic chamber 50, and preventing the electrolytic cell from deforming.

[0059] In one embodiment, fitting structures are respectively formed between the two sides of the second sealing portion 42 and the electrode plate 10, and the fitting structures on both sides of the second sealing portion 42 are arranged in pairs. The paired fitting structures can clamp the second sealing portion 42 under the clamping of the two electrode plates 10, ensuring the relative position of the second sealing portion 42 and the electrode plate 10. In this way, the second sealing portion 42 is not easily deformed or moved, and can stably support the first sealing portion 41 and the gasket 30, providing a guarantee for the beneficial effects mentioned above.

[0060] Specifically, as Figure 5As shown, the fitting structure includes a groove 101 formed on the surface of the electrode plate 10 and an elastic protrusion 421 formed on the surface of the second sealing portion 42. By clamping the second sealing portion 42 with two electrode plates 10, the elastic protrusion 421 is fitted into the groove 101. This can increase the pressure between the second sealing portion 42 and the electrode plate 10, not only sealing the gap between the second sealing portion 42 and the electrode plate 10, but also effectively limiting the second sealing portion 42 to prevent the second sealing portion 42 from moving relative to the electrode plate 10 under external pressure or internal pressure, further enhancing the connection strength of the sealing ring 40.

[0061] Furthermore, in one embodiment, the fitting structure further includes a protrusion 102 formed on one side of the groove 101. The protrusion 102 protrudes towards the second sealing portion 42 and protrudes from the surface of the electrode plate 10 facing the second sealing portion 42. That is to say, the protrusion 102 is higher than the surface of the electrode plate 10. In this way, when the electrode plate 10 clamps the sealing ring 40, the protrusions 102 arranged oppositely on the two electrode plates 10 can further squeeze the second sealing portion 42, increasing the pressure between the second sealing portion 42 and the electrode plate 10, improving the limiting effect on the second sealing portion 42. At the same time, the protrusion 102 squeezes the elastic second sealing portion 42, causing at least part of the end of the protrusion 102 to extend between two adjacent elastic protrusions 421. In this way, an interleaved layout is formed between the protrusion 102 and the elastic protrusion 421, and the protrusion 102 can play a role in resisting the elastic protrusion 421, effectively preventing the sealing ring 40 from displacing relative to the electrode plate 10 along the plane where it is located.

[0062] As Figure 8 and Figure 9 shown, in one embodiment, a plurality of grooves 101 and protrusions 102 are respectively provided, and each groove 101 and each protrusion 102 respectively surround the surface of the electrode plate 10 to form a closed loop. Correspondingly, a plurality of elastic protrusions 421 are also provided, and each elastic protrusion 421 surrounds the surface of the second sealing portion 42 to form a closed loop. In this way, the fitting structure is arranged along the outer periphery of the electrolytic chamber 50 for one week, which can strengthen the sealing of the four sides of the electrolytic chamber 50, and at the same time limit the sealing ring 40 in the circumferential direction, making the sealing ring 40 and the electrode plate 10 tightly connected together, improving the structural strength of the electrolytic cell device and meeting the performance requirements of the electrolytic cell device under high-pressure environments.

[0063] As Figure 12 and Figure 13As shown, the membrane electrode 20 of this embodiment can be a rectangular structure, the gasket 30 is a rectangular frame structure of corresponding size, and the sealing ring 40 is also correspondingly set as a rectangular frame structure to surround the gasket 30. The electrode plate 10 is set as a rectangle of the same size as the sealing ring 40, so as to clamp the sealing ring 40 and be flush with the edge of the sealing ring 40 at the same time, ensuring the flatness of the electrolytic cell device and facilitating installation.

[0064] Of course, in some embodiments, the shapes of the membrane electrode 20, the gasket 30, the sealing ring 40, and the electrode plate 10 are not limited to rectangles, and can also be set as circles or other shapes, which are not uniquely defined here.

[0065] It is worth mentioning that since the surface of the electrode plate 10 of this embodiment is provided with grooves 101 and protrusions 102, and the grooves 101 and protrusions 102 are arranged adjacent to each other, therefore, in one embodiment, as Figure 8 shown, the electrode plate 10 is preferably manufactured by a stamping process. By stamping one side surface of the electrode plate 10, the grooves 101 are made, and then the protrusions 102 are made by reverse stamping, which can greatly improve the manufacturing efficiency of the electrode plate 10, and the electrode plate 10 formed by stamping can have a thinner thickness, which can reduce costs and reduce the weight of the electrolytic cell device.

[0066] In some embodiments, the electrode plate 10 can also be an etched plate, and the grooves 101 and protrusions 102 are made by etching technology. Compared with the electrode plate 10 formed by stamping, the etched plate has a certain thickness. Although the strength is increased, the advantage of cost reduction may be insufficient.

[0067] As Figure 3 and Figure 12 and Figure 13 shown, in one embodiment, the gasket 30 and the membrane electrode 20 are respectively provided with corresponding card holes 32. When the gasket 30 is laid on both sides of the membrane electrode 20, the card holes 32 of the two gaskets 30 and the membrane electrode 20 are completely aligned. The electrolytic cell device is also provided with a card block 33, and the shape of the card block 33 corresponds to the shape of the card hole 32. The card block 33 can be correspondingly inserted into the card holes 32 of the gasket 30 and the membrane electrode 20. The card block 33 is inserted into the card holes 32 of the gasket 30 and the membrane electrode 20 at the same time to limit the membrane electrode 20 and the gasket 30.

[0068] Preferably, the card holes 32 and the card blocks 33 are rectangular in shape, and the card holes 32 are arranged at the edge positions of the gasket 30 and the membrane electrode 20 to ensure that they can be completely covered by the sealing ring 40.

[0069] It should be noted that in the direction of the clamping block 33 along the lamination of the gasket 30 and the membrane electrode 20, the thickness of the clamping block 33 should be at least greater than the thickness of the membrane electrode 20. Preferably, the thickness of the clamping block 33 is the sum of the thicknesses of two gaskets 30 and the membrane electrode 20, so that when the clamping block 33 is inserted into the clamping hole 32 of the gasket 30 and the membrane electrode 20, it is flush with the surface of the gasket 30, ensuring smooth contact between the sealing ring 40 and the gasket 30 and not affecting the sealing effect of the sealing ring 40.

[0070] As a further improvement, in one embodiment, the sealing ring 40 further has a third sealing portion 43. The third sealing portion 43 is disposed outside the second sealing portion 42. On the basis of the two-layer sealing design achieved by the first sealing portion 41 and the second sealing portion 42, the third sealing portion 43 realizes the third-layer sealing and strengthening design.

[0071] As Figure 9 and Figure 10 shown, the third sealing portion 43 is seamlessly connected to the end of the second sealing portion 42 and surrounds the second sealing portion 42. The third sealing portion 43 is located between every two adjacent electrode plates 10. A support member 432 is provided inside the third sealing portion 43, and the hardness of the support member 432 is greater than the hardness of the third sealing portion 43. The support member 432 can increase the overall hardness of the third sealing portion 43 and is not easily deformed. When a chemical reaction occurs inside the electrolysis chamber 50, the high-pressure environment inside presses the gasket 30 and the first sealing portion 41, causing the second sealing portion 42 to deform outward. The support member 432 located outside the second sealing portion 42 can support the second sealing portion 42 and prevent the second sealing portion 42 from deforming outward.

[0072] Specifically, as Figure 10 and Figure 11 shown, a receiving groove 431 is formed on the surface of the third sealing portion 43 away from the second sealing portion 42. The receiving groove 431 winds around the third sealing portion 43 to form a closed loop, and the support member 432 is disposed in the receiving groove 431 and surrounds the second sealing portion 42.

[0073] The support member 432 is an annular member, sleeved on the outer periphery of the third sealing portion 43 and flush with the surface of the third sealing portion 43. The annular closed structure of the support member 432 can firmly sleeve the third sealing portion 43 and can play an inward resisting role on the second sealing portion 42, effectively preventing the second sealing portion 42 from deforming outward.

[0074] Preferably, the support member 432 can be a metal member or a hard plastic material.

[0075] In this embodiment, the sealing ring 40 is relatively soft compared to the support member 432 and can be made of fluororubber. The first sealing portion 41, the second sealing portion 42, and the third sealing portion 43 are integrally formed of fluororubber.

[0076] The relatively rigid support member 432 is located between two adjacent electrode plates 10. When the two electrode plates 10 are assembled, a clamping force is generated between the support member 432 and the electrode plates 10. This clamping force acts on the third sealing portion 43 between them, increasing the pressure of the third sealing portion 43, and can provide more powerful support for the second sealing portion 42 to prevent the second sealing portion 42 from deforming outward.

[0077] In this embodiment, the number of the electrode plates 10 and the sealing rings 40 in the electrolytic cell device is not uniquely limited. There can be two electrode plates 10, or more than two. When the electrolytic cell device uses two electrode plates 10, the two electrode plates 10 are respectively an anode plate and a cathode plate, and there is one sealing ring 40 mentioned in the above embodiment between the two electrode plates 10. One sealing ring 40 surrounds two gaskets 30 and a membrane electrode 20. Thus, the assembly formed by using two electrode plates 10 can be used as a functional unit of the electrolytic cell device.

[0078] In some embodiments, in order to improve the efficiency of water electrolysis, the electrolytic cell device is formed by stacking multiple such functional units. Such an electrolytic cell device has multiple electrode plates 10, and sealing rings 40 are arranged between adjacent electrode plates 10. It is worth mentioning that the electrode plates 10 at both ends of the electrolytic cell device are an anode plate and a cathode plate, and the electrode plates 10 in the middle position adopt bipolar plates. One side of the bipolar plate is an anode, forming an anode chamber with the membrane electrode 20, and the other side is a cathode, forming a cathode chamber with another membrane electrode 20.

[0079] As Figure 2 shown, in one embodiment, the electrolytic cell device has four electrode plates 10, and one sealing ring 40 is clamped between every two adjacent electrode plates 10, which is equivalent to three stacked functional units mentioned above. Grooves 101 are provided on both side surfaces of each electrode plate 10.

[0080] As Figure 5 shown, among them, the grooves 101 on both sides of the same electrode plate 10 are arranged staggeredly, and the protruding portion 102 on each side surface of the electrode plate 10 is the back of the groove 101 on the other side. Similarly, the elastic protrusions 421 of the two sealing rings 40 on both sides of the same electrode plate 10 are arranged staggeredly. In this way, when multiple electrode plates 10 and multiple sealing rings 40 are stacked in sequence, the elastic protrusions 421 of adjacent sealing rings 40 are staggered, which can ensure that the sealing rings 40 are fully squeezed by the electrode plates 10, improving the sealing effect of the sealing rings 40. At the same time, the staggered arrangement of the elastic protrusions 421 of adjacent sealing rings 40 is beneficial to reducing the thickness of the sealing rings 40, enabling a closer distance to be set between the electrode plates 10, further improving the thinness of the functional unit of the electrolytic cell and increasing the electrolysis efficiency.

[0081] Please refer to Figure 1 andFigure 7 In this embodiment, a plurality of channels 60 are formed on the surface of the electrode plate 10 to serve as water channels and gas channels for communicating with the electrolytic chamber 50. Specifically, the channels 60 are arranged in the area where the first sealing portion 41 is located, and the channels 60 penetrate through the entire electrolytic cell device.

[0082] As Figure 7 and Figure 12 shown, a plurality of comb teeth portions 31 are provided on the inner peripheral edge of the gasket 30. The comb teeth portions 31 are at least partially located in the channels 60, and one end of the comb teeth portions 31 extends into the electrolytic chamber 50. The gaps in the comb teeth portions 31 form through holes 311 for communicating the channels 60 with the electrolytic chamber 50.

[0083] In this embodiment, the channels 60 are arranged at both ends of the electrolytic chamber 50. The channels 60 at one end of the electrolytic chamber 50 are used as water channels, and the channels 60 at the other end of the electrolytic chamber 50 are used as gas channels. Preferably, the through holes 311 connecting the water channels with the electrolytic chamber 50 are water through holes, and the through holes 311 connecting the gas channels with the electrolytic chamber 50 are gas through holes. The water through holes are used to guide the flow of electrolyte between the water channels and the electrolytic chamber 50. For example, the electrolyte in the water channels is introduced into the anode chamber; the gas through holes are used to guide the flow of air between the gas channels and the electrolytic chamber 50. For example, the hydrogen in the cathode chamber is introduced into the gas through holes and then discharged from this electrolytic cell device to produce hydrogen.

[0084] The membrane electrode 20 of this embodiment includes a diaphragm 21 and a diffusion layer located on the surface of the diaphragm 21. The diffusion layer is correspondingly arranged in the electrolytic chamber 50. In one embodiment, the diffusion layer can be titanium felt 23 and / or carbon paper 22, or the titanium felt 23 and the carbon paper 22 are respectively arranged in the anode chamber or the cathode chamber. In one embodiment, the diffusion layer can also be titanium foam. This embodiment does not make a unique limitation on the structure and material of the diffusion layer.

[0085] In this embodiment, in order to ensure that the electrolytic chamber 50 is not easily deformed and to ensure the sealing effect of the sealing ring 40, the gasket 30 is made of a material harder than the sealing ring 40. Preferably, the gasket 30 can be made of PTFE plates. In some embodiments, the material of the gasket 30 can be other hard plastics or rubbers with a certain hardness. This embodiment does not make a unique limitation on the material of the gasket 30.

[0086] As Figure 1 and Figure 2 shown, positioning holes 70 are further provided on the four peripheral edges of the electrode plate 10 of this embodiment. The positioning holes 70 penetrate through the electrode plate 10, the sealing ring 40, the gasket 30, and the diaphragm 21 in sequence. The positioning holes 70 are used for positioning when the electrode plate 10, the sealing ring 40, the gasket 30, and the diaphragm 21 are stacked and installed in sequence, so as to improve the assembly efficiency.

[0087] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0088] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrolytic cell device, characterized in that, Comprising: At least two oppositely arranged electrode plates (10); A membrane electrode (20) located between every two adjacent ones of the electrode plates (10); Gaskets (30) respectively laid on both side surfaces of the membrane electrode (20), each gasket (30) and the membrane electrode (20) and the electrode plate (10) enclosing an electrolysis chamber (50); A sealing ring (40) located between every two adjacent ones of the electrode plates (10), the sealing ring (40) including a first sealing portion (41) and a second sealing portion (42), wherein the first sealing portion (41) is clamped between the electrode plate (10) and the gasket (30) to seal the electrolysis chamber (50), and the second sealing portion (42) extends from the first sealing portion (41) to the end of the gasket (30) to abut against the gasket (30); The second sealing portion (42) is seamlessly connected to the two first sealing portions (41) on both sides of the gasket (30) and is wound around the outside of the end of the gasket (30) to surround the gasket (30) and the membrane electrode (20), and the second sealing portion (42) is used to seal the gap between the first sealing portion (41) and the gasket (30), and the gap between the gasket (30) and the membrane electrode (20); The sealing ring (40) further includes a third sealing portion (43), the third sealing portion (43) is seamlessly connected to the end of the second sealing portion (42) and surrounds the second sealing portion (42), the third sealing portion (43) is located between every two adjacent ones of the electrode plates (10), and a support member (432) is provided inside the third sealing portion (43), and the hardness of the support member (432) is greater than the hardness of the third sealing portion (43); A receiving groove (431) is formed on the surface of the third sealing portion (43) away from the second sealing portion (42), the receiving groove (431) winds around the third sealing portion (43) for one week to form a closed loop, and the support member (432) is arranged in the receiving groove (431) and surrounds the second sealing portion (42).

2. The electrolytic cell device according to claim 1, characterized in that, Fitting structures are respectively formed between both sides of the second sealing portion (42) and the electrode plate (10), and the fitting structures on both sides of the second sealing portion (42) are arranged in pairs.

3. The electrolytic cell device according to claim 2, characterized in that, The fitting structure includes a groove (101) formed on the surface of the electrode plate (10), and an elastic protrusion (421) formed on the surface of the second sealing portion (42), and the elastic protrusion (421) is fitted in the groove (101) to seal the gap between the second sealing portion (42) and the electrode plate (10) and can limit the position of the second sealing portion (42).

4. The electrolytic cell device according to claim 3, characterized in that, The fitting structure further includes a protruding portion (102) formed on one side of the groove (101), and the protruding portion (102) protrudes from the surface of the electrode plate (10) facing the second sealing portion (42) to limit the position of the elastic protrusion (421).

5. The electrolytic cell device according to claim 4, characterized in that, A plurality of the grooves (101) and the protrusions (102) are respectively provided, and each of the grooves (101) and each of the protrusions (102) respectively wind around the surface of the electrode plate (10) for one week to form a closed loop; A plurality of the elastic protrusions (421) are provided corresponding to the grooves (101), and each of the elastic protrusions (421) winds around the surface of the second sealing portion (42) for one week to form a closed loop.

6. The electrolytic cell device according to claim 5, characterized in that, The electrolytic cell device includes at least three of the electrode plates (10) and at least two of the sealing rings (40). The grooves (101) on both sides of the same electrode plate (10) are arranged staggeredly, and the protrusions (102) are formed on the back side of each of the grooves (101). The elastic protrusions (421) of the sealing rings (40) on both sides of the same electrode plate (10) are arranged staggeredly.

7. The electrolytic cell device according to any one of claims 1-6, characterized in that, Corresponding card holes (32) are respectively formed in the gasket (30) and the membrane electrode (20); The electrolytic cell device further includes a card block (33), and the card block (33) can be correspondingly inserted into the card holes (32) of the gasket (30) and the membrane electrode (20) to limit the membrane electrode (20) and the gasket (30).

8. The electrolytic cell device according to any one of claims 1-6, characterized in that, A channel (60) penetrating the electrolytic cell device is formed in the area of the first sealing portion (41), and a through hole (311) communicating the channel (60) with the electrolytic chamber (50) is provided on the gasket (30); wherein, the channel (60) includes a water channel and a gas channel, and the through hole (311) includes a water through hole and a gas through hole; The electrolytic chamber (50) is respectively communicated with the water channel through the water through hole and communicated with the gas channel through the gas through hole.

9. The electrolytic cell device according to any one of claims 1-6, characterized in that, The membrane electrode (20) includes a diaphragm (21) and a diffusion layer on the surface of the diaphragm (21). The diffusion layer is located in the electrolytic chamber (50), and the diffusion layer includes titanium felt (23) and / or carbon paper (22).

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