Electrolytic tank locking mechanism, electrolytic tank and assembling method of electrolytic tank

Abstract

The invention relates to the technical field of electrolytic cells, and provides an electrolytic cell locking mechanism, an electrolytic cell and an assembling method of the electrolytic cell. A second end plate; the locking device is arranged between the first end plate and the second end plate, and the locking device can apply locking force towards the second end plate to the first end plate so as to counteract force causing the first end plate to protrude outwards; by means of the locking device, locking force towards the second end plate can be applied to the first end plate during working, the upward arching tendency of the end plates can be resisted in real time, the end plates are kept in a stable plane state when facing various pressures, it is ensured that electrodes in an electrolytic cell are tightly attached to a proton exchange membrane, resistance is reduced, and the service life of the proton exchange membrane is prolonged. The ion conduction environment is optimized, so that the electrolytic reaction can be carried out more smoothly, and the electrolytic efficiency is remarkably improved; and moreover, the integrity of the sealing structure of the electrolytic bath is further maintained, so that the sealing structure always keeps good sealing performance in long-time electrolysis operation.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic cells, and in particular to an electrolytic cell locking mechanism, an electrolytic cell and an electrolytic cell assembly method. Background Art

[0002] In the current electrolyzer system, the end plates are mostly flat-plate shaped, and the materials are generally metal (such as stainless steel) or composite materials. Their main function is to seal the internal space of the electrolyzer and provide necessary support for key components such as the internal electrodes and proton exchange membranes. In terms of connection methods, screw holes are generally set at the four corners of the end plate, and the end plate is fastened to the other components of the electrolyzer with the help of bolts. During assembly, the internal electrodes, proton exchange membranes and other components are first installed in place according to the conventional process, and then the end plate is placed in the preset position. The bolts are passed through the screw holes at the corners of the end plate in sequence and tightened to complete the installation process of the end plate. This structural design is relatively simple and can meet the basic assembly requirements of the electrolyzer to a certain extent.

[0003] However, the existing technology has the following shortcomings: in the assembly process, it only relies on the bolts at the four corners of the end plate for tightening. When faced with assembly stress and internal pressure generated during the electrolysis process, the middle area of the end plate lacks an effective constraint mechanism, and the middle part of the end plate is very easy to arch upward. Once the end plate arches up, the central area of the electrolytic cell will become uneven, making it impossible for the internal electrode and the proton exchange membrane to fit tightly. The degree of fit between the electrode and the proton exchange membrane plays a decisive role in the smooth progress of the electrolysis reaction. Poor fit will increase resistance, reduce ion conduction efficiency, and thus lead to a significant drop in electrolysis efficiency. If the end plate is seriously arched, it will destroy the sealing structure of the electrolytic cell, causing hydrogen or oxygen to leak. Under certain conditions, it is very likely to cause serious safety accidents such as explosions, posing a great threat to personnel safety and normal operation of equipment. Summary of the Invention

[0004] The present invention provides an electrolytic cell locking mechanism, an electrolytic cell and an electrolytic cell assembly method, which can effectively prevent the end plate from arching when the electrolytic cell is assembled, ensure that the central area of the electrolytic cell is flat, and improve the overall performance and stability of the electrolytic cell.

[0005] The present invention provides an electrolytic cell locking mechanism, comprising: a first end plate; a second end plate; and A locking device is provided between the first end plate and the second end plate, and the locking device can apply a locking force to the first end plate toward the second end plate to offset the force causing the first end plate to bulge outward.

[0006] According to the electrolytic cell locking mechanism provided by the present invention, the locking device comprises: a locking screw, axially passing through the second end plate and the first end plate in sequence, wherein a first end of the locking screw is connected to an outer side of the second end plate, and a second end of the locking screw is located on an outer side of the first end plate; A locking nut is connected to the second end of the locking screw, and the locking nut can contact the outer side of the first end plate to apply a locking force from the outer side of the first end plate toward the second end plate.

[0007] The electrolytic cell locking mechanism provided by the present invention further includes: The elastic gasket is sleeved on the locking screw and is located between the locking nut and the outer side of the first end plate.

[0008] According to the electrolytic cell locking mechanism provided by the present invention, a pressure-bearing member is further provided between the elastic gasket and the outer side of the first end plate.

[0009] According to the electrolytic cell locking mechanism provided by the present invention, a first connecting hole is provided in the middle of each of the first end plate and the second end plate for matching with the locking screw.

[0010] According to the electrolytic cell locking mechanism provided by the present invention, the pressure-bearing member is a circular pressure-bearing block, and the diameter of the pressure-bearing block is larger than the diameter of the locking nut.

[0011] According to the electrolytic cell locking mechanism provided by the present invention, a first insulating plate, a first current collecting plate, a bipolar plate, a cathode gas diffusion layer, an MEA membrane electrode, an anode gas diffusion layer, a second current collecting plate and a second insulating plate are sequentially provided between the first end plate and the second end plate, and a through hole for a locking screw to pass through is provided in the middle of the first insulating plate, the first current collecting plate, the bipolar plate, the cathode gas diffusion layer, the MEA membrane electrode, the anode gas diffusion layer, the second current collecting plate and the second insulating plate.

[0012] In a second aspect, the present invention provides an electrolytic cell comprising the electrolytic cell locking mechanism as described in the first aspect.

[0013] The electrolytic cell provided by the present invention further comprises: A plurality of second connection holes are provided, and the plurality of second connection holes are evenly arranged around the first end plate and the second end plate; The number of the fastening bolts is the same as that of the second connection holes and the positions thereof correspond one to one. The fastening bolts pass through the second connection holes of the first end plate and the second end plate to connect the first end plate and the second end plate.

[0014] In a third aspect, the present invention further provides an electrolytic cell assembly method, which is applied to the electrolytic cell described in the second aspect and comprises the following steps: Connecting the first end plate, the second end plate, and the components between the two end plates in sequence; Pass the locking screw through the first connecting hole and the through hole in the middle; Installing a pressure-bearing member, an elastic washer, and a locking nut in sequence on the locking screw on the outer side of the first end plate; Rotating the lock nut applies pressure from the outside of the first end plate toward the second end plate.

[0015] The present invention provides an electrolytic cell locking mechanism, comprising a first end plate, a second end plate, and a locking device arranged between the first end plate and the second end plate, wherein the locking device can apply a locking force to the first end plate toward the second end plate to offset the force that causes the first end plate to bulge outward; the present invention is provided with a locking device between the first end plate and the second end plate, and when working, the first end plate can apply a locking force to the second end plate, which can resist the upward arch trend of the end plate in real time, solving the problem that the end plate in the traditional electrolytic cell is only fastened by bolts at four corners, and the middle area lacks constraints and appears to be arched under the action of assembly stress and internal pressure during the electrolysis process, so that the end plate maintains a stable planar state when facing various pressures, ensuring the close fit between the electrode and the proton exchange membrane inside the electrolytic cell, reducing resistance, optimizing the ion conduction environment, and making the electrolysis reaction more smooth, thereby significantly improving the electrolysis efficiency. In addition, the present invention prevents the end plate from arching by the locking mechanism, further maintaining the integrity of the electrolytic cell sealing structure, so that it can always maintain good sealing performance during long-term electrolysis operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural exploded diagram of the locking device provided by an embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of an electrolytic cell provided in an embodiment of the present invention.

[0019] Figure 3 1 is an exploded view of an electrolytic cell provided in an embodiment of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the first end plate provided in an embodiment of the present invention.

[0021] Reference numerals: 1. First end plate; 2. Second end plate; 3. Locking screw; 4. Locking nut; 5. Elastic gasket; 6. Pressure-bearing part; 7. Fastening bolt; 8. First connecting hole; 9. Second connecting hole; 10. First insulating plate; 11. First current collecting plate; 12. Bipolar plate; 13. Cathode gas diffusion layer; 14. MEA membrane electrode; 15. Anode gas diffusion layer; 16. Second current collecting plate; 17. Second insulating plate. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] The following combination Figure 1-Figure 4 The invention describes an electrolytic cell locking mechanism, an electrolytic cell and an electrolytic cell assembly method.

[0024] An embodiment of the present invention provides an electrolytic cell locking mechanism, comprising: a first end plate 1; a second end plate 2; and a locking device arranged between the first end plate 1 and the second end plate 2, wherein the locking device can apply a locking force to the first end plate 1 toward the second end plate 2 to offset the force causing the first end plate 1 to bulge outward.

[0025] From the above scheme, it can be seen that the present invention can apply a locking force to the first end plate 1 toward the second end plate 2 when working by setting the locking device between the first end plate 1 and the second end plate 2. Figure 1 The downward locking force in the middle can counteract the upward arching tendency of the end plate in real time, solving the problem that in traditional electrolyzers, the end plate is fastened only by bolts at the four corners. Under the action of assembly stress and internal pressure during the electrolysis process, the middle area lacks constraints and arches upward. The end plate maintains a stable planar state when facing various pressures, ensuring the close fit between the electrodes and the proton exchange membrane inside the electrolyzer, reducing resistance, optimizing the ion conduction environment, and allowing the electrolysis reaction to proceed more smoothly, thereby significantly improving the electrolysis efficiency.

[0026] Furthermore, the present invention prevents the end plate from arching up through the locking mechanism, thereby further maintaining the integrity of the sealing structure of the electrolytic cell, so that the electrolytic cell can always maintain good sealing performance during long-term electrolysis operation.

[0027] like Figure 1As shown, in some specific embodiments, the locking device includes: a locking screw 3 and a locking nut 4. The locking screw 3 passes through the second end plate 2 and the first end plate 1 in sequence along the axial direction. The first end of the locking screw 3 is connected to the outer side of the second end plate 2, and the second end of the locking screw 3 is located on the outer side of the first end plate 1. The outer side of the second end plate 2 is the side away from the first end plate 1, and the outer side of the first end plate 1 is the side away from the second end plate 2. The locking nut 4 is connected to the second end of the locking screw 3, and the locking nut 4 can contact the outer side of the first end plate 1 to apply a locking force to the first end plate 1 from the outer side toward the second end plate 2. Specifically, a first connecting hole 8 is provided in the middle of each of the first end plate 1 and the second end plate 2 for adapting to the locking screw 3.

[0028] With such arrangement, when assembling the electrolytic cell, the locking screw 3 is passed axially through the second end plate 2 and the first end plate 1 at both ends of the electrolytic cell in sequence, so that the first end of the locking screw 3 is firmly connected to the outer side of the second end plate 2, ensuring that it serves as a support base point in the entire structure. Subsequently, the locking nut 4 is screwed on the second end of the locking screw 3 located on the outer side of the first end plate 1, and the locking nut 4 is rotated by using a tool to gradually approach and contact the outer side of the first end plate 1, applying a locking force to the first end plate 1 toward the second end plate 2, effectively offsetting the force that causes the first end plate 1 to arch upward, thereby greatly improving the stability of the end plate during operation; when the locking nut After tightening the first end plate 1 and applying a locking force toward the second end plate 2, the first and second end plates 1 and 2 are tightly drawn together, which evenly compresses the sealing structure of the electrolytic cell. During the electrolysis process, even if high pressure is generated internally, the sealing structure always maintains a good compression state because the end plates are firmly locked, and no gaps or loosening will occur due to displacement or deformation of the end plates. This design can accurately control the locking force applied to the first end plate 1. The operator can flexibly adjust the locking force according to actual needs by controlling the tightening degree of the locking nut 4 to cope with the pressure changes generated inside the electrolytic cell under different operating conditions. Moreover, because the locking screw 3 and the locking nut 4 act directly on the end plates, they can provide a stable and continuous locking force for the end plates.

[0029] In some optional embodiments, when the electrolytic cell is placed vertically on a work surface for use, an end cap is provided at the first end of the locking screw 3, and a recessed groove is provided around the first connecting hole 8 on the outside of the second end plate 2. The end cap is adapted to the recessed groove, and the area of the end cap is larger than the cross-sectional area of the first connecting hole 8, and can abut against the outside of the second end plate 2, so that when the locking nut 4 is tightened, the first end of the locking screw 3 can apply a force to it on the outside of the second end plate 2.

[0030] In other optional embodiments, the first end of the locking screw 3 also cooperates with the locking nut 4, that is, both ends of the locking screw 3 are provided with threads, and both are located on the outside of the end plate. The first end of the locking screw 3 applies a force to it from the outside of the second end plate 2 through the locking nut 4, which can also achieve the effect of providing a locking force. This method is suitable for placing the electrolytic cell vertically on the bracket, and space is reserved between the bracket and the ground to accommodate the first end of the locking screw 3 and the locking nut 4.

[0031] A recessed groove is provided around the first connecting hole 8 on the outside of the second end plate 2, and the end cap is adapted to the recessed groove. The area of the end cap is larger than the cross-sectional area of the first connecting hole 8, and it can abut against the outside of the second end plate 2, so that when the locking nut 4 is tightened, the first end of the locking screw 3 can apply a force to it on the outside of the second end plate 2.

[0032] In a further embodiment, the locking device further comprises an elastic gasket 5, The elastic gasket 5 is sleeved on the locking screw 3 and is located between the locking nut 4 and the outer side of the first end plate 1 . The elastic gasket 5 can be made of elastic materials such as rubber or spring steel.

[0033] With such arrangement, on the one hand, when tightening the locking nut 4, as the locking nut 4 applies a locking force to the first end plate 1, the elastic gasket 5 is compressed. Since the elastic gasket 5 has elastic deformation ability, it can absorb the large extrusion force generated during the tightening of the locking nut 4, and distribute the force evenly to the surface of the end plate through its own elastic deformation, thereby avoiding damage such as wear, deformation or even rupture of the first end plate 1 due to excessive local force, and can effectively extend the service life of the first end plate 1, ensure the integrity and functionality of the first end plate 1, and reduce the cost of equipment maintenance and replacement.

[0034] On the other hand, during the operation of the electrolytic cell, the first end plate 1 may move slightly in the axial direction due to factors such as temperature changes and internal pressure fluctuations. The elastic gasket 5 can play a compensatory role, maintain the locking force on the first end plate 1, and always keep a close fit on the first end plate 1, ensuring that under various working conditions, the locking force applied by the locking device to the first end plate 1 is always maintained within an appropriate and stable range.

[0035] In addition, since the elastic gasket 5 will undergo adaptive deformation when affected by the pressure of the locking nut 4 and the deformation of the end plate, filling the tiny gap between the end plate and the locking nut 4, this tight filling effect makes the sealing structure of the electrolytic cell more perfect, further preventing the leakage of internal gas, greatly improving the sealing performance of the electrolytic cell, reducing the risk of leakage of dangerous gases such as hydrogen and oxygen, and providing more reliable protection for the safe operation of the electrolytic cell.

[0036] Preferably, in this embodiment, a pressure-bearing member 6 is further provided between the elastic gasket 5 and the outer side of the first end plate 1. The pressure-bearing member 6 can be a circular pressure block, which is sleeved on the locking screw 3. The diameter of the pressure block is larger than the diameter of the locking nut 4, and the surface of the pressure block is polished to reduce the friction between the end plate and ensure that the force can be evenly transmitted to the end plate when the locking force is applied.

[0037] With this arrangement, the force transmission path from the locking nut 4 to the elastic gasket 5, to the pressure block, and finally to the end plate is more reasonable and smooth; on the one hand, when the locking nut 4 is tightened and the force is transmitted to the pressure block through the elastic gasket 5, since the diameter of the pressure block is larger than the diameter of the locking screw 3, the concentrated force from the locking screw 3 can be dispersed to a larger area in contact with the end plate, effectively preventing the first end plate 1 from being deformed or damaged due to excessive local force, greatly protecting the structural integrity of the end plate, and also helping to maintain the stability and sealing of the internal space of the electrolytic cell, ensuring the long-term and efficient operation of the electrolytic cell.

[0038] On the other hand, since the pressure block can transmit force evenly, the entire end plate is subjected to balanced force at all parts when subjected to locking force, and can more effectively resist the upward arch deformation caused by assembly stress and internal pressure during the electrolysis process. The uniform locking force transmitted by the pressure block can comprehensively and evenly resist this deformation trend; it improves the stability of the end plate, and thus improves the stability of the overall structure of the electrolytic cell, has a positive effect on maintaining a good fit between the electrode and the proton exchange membrane, helps to improve electrolysis efficiency, and reduces the problem of electrolysis performance degradation caused by end plate deformation.

[0039] Reference Figure 2 、 Figure 3 In this embodiment, a first insulating plate 10, a first current collecting plate 11, a bipolar plate 12, a cathode gas diffusion layer 13, an MEA membrane electrode 14, an anode gas diffusion layer 15, a second current collecting plate 16, and a second insulating plate 17 are sequentially provided between the first end plate 1 and the second end plate 2. Through holes for the locking screw 3 to pass through are provided in the middle of the first insulating plate 10, the first current collecting plate 11, the bipolar plate 12, the cathode gas diffusion layer 13, the MEA membrane electrode 14, the anode gas diffusion layer 15, the second current collecting plate 16, and the second insulating plate 17.

[0040] During operation, the first current collecting plate 11 and the second current collecting plate 16 are responsible for collecting and transmitting current, respectively. The bipolar plate 12 is used to separate the cathode and anode reaction areas and conduct current. The cathode gas diffusion layer 13 and the anode gas diffusion layer 15 provide gas diffusion channels for the cathode and anode reactions, respectively. The MEA membrane electrode 14 is the core area where the electrochemical reaction occurs. The through-holes between each layer not only lock the central area of the first end plate 1 and the second end plate 2, but also ensure that the installation of the locking screw 3 does not interfere with the electrical connection and ion conduction path between the various components. For example, current can be smoothly conducted between the current collecting plate and the bipolar plate 12, and ions can be orderly transmitted between the gas diffusion layer and the MEA membrane electrode 14 without being hindered by the locking screw 3.

[0041] Specifically, the first insulating plate 10, the first current collecting plate 11, the bipolar plate 12, the cathode gas diffusion layer 13, the MEA membrane electrode 14, the anode gas diffusion layer 15, the second current collecting plate 16 and the second insulating plate 17 of each layer are arranged in sequence between the first end plate 1 and the second end plate 2, and the locking screw 3 passes through the through hole in the middle of each layer to tightly connect the entire structure in series. When the locking nut 4 is tightened and a locking force is applied to the first end plate 1 toward the second end plate 2 through the locking screw 3, this force is transmitted to each layer of components in turn to make them fit tightly; for example, during the operation of the electrolytic cell, the pressure generated inside will try to separate or dislocate the components of each layer, but the locking force transmitted by the locking screw 3 can effectively maintain the close connection between the layers, ensuring the stability and integrity of the internal structure of the electrolytic cell, ensuring that key components such as the electrodes and proton exchange membrane MEA membrane electrode 14 operate in the best working state, and avoiding the impact of component displacement or loosening on the electrolysis reaction.

[0042] An embodiment of the present invention provides an electrolytic cell, comprising the electrolytic cell locking mechanism described above.

[0043] like Figure 3 and Figure 4 As shown, in this embodiment, it also includes a second connecting hole 9 and a fastening bolt 7. A plurality of second connecting holes 9 are provided, and the plurality of second connecting holes 9 are evenly arranged around the first end plate 1 and the second end plate 2; the fastening bolts 7 are the same in number as the second connecting holes 9 and their positions correspond one to one. The first end plate 1 and the second end plate 2 are connected by the fastening bolts 7 passing through the second connecting holes 9 of the first end plate 1 and the second end plate 2.

[0044] With such arrangement, multiple second connecting holes 9 are evenly distributed around the first end plate 1 and the second end plate 2, and the fastening bolts 7 pass through these holes accordingly. When the fastening bolts 7 are screwed into the second connecting holes 9 of the first end plate 1 and the second end plate 2 in turn and tightened, it is like building a fastening frame surrounding the end plates, tightly connecting the first end plate 1 and the second end plate 2 in all directions, significantly enhancing the stability of the overall structure of the electrolytic cell; specifically, the middle locking device mainly concentrates on applying the locking force in the middle of the end plate, while the surrounding fastening bolts 7 evenly disperse the force around the end plate. When the electrolytic cell is working, the internal pressure and assembly stress will act on the end plate in combination. At this time, the middle locking device assumes the main task of offsetting the arch force on the end plate, while the surrounding fastening bolts 7 evenly disperse the remaining force to the edge area of the end plate; reasonable force distribution can extend the service life of the end plate and the entire electrolytic cell, reduce the failure rate of the equipment due to uneven force, reduce maintenance costs, and improve the reliability and stability of the equipment.

[0045] Moreover, during the assembly stage, the evenly distributed second connecting holes 9 make the installation of the first end plate 1 and the second end plate 2 easier and more accurate. The installer can quickly determine the relative position of the end plates by pre-aligning these holes, and then use the fastening bolts 7 for preliminary fixation, and then use the intermediate locking device to make the final fastening adjustment.

[0046] An embodiment of the present invention further provides an electrolytic cell assembly method, which is applied to the above-mentioned electrolytic cell and includes the following steps: Step S100: Connect the first end plate 1, the second end plate 2 and the components between the two end plates in sequence; specifically, the components include a first insulating plate 10, a first current collecting plate 11, a bipolar plate 12, a cathode gas diffusion layer 13, an MEA membrane electrode 14, an anode gas diffusion layer 15, a second current collecting plate 16 and a second insulating plate 17; wherein, a first connecting hole 8 is set in the center of the first end plate 1 and the second end plate, and a through hole is set in the middle of the first insulating plate 10, the first current collecting plate 11, the bipolar plate 12, the cathode gas diffusion layer 13, the MEA membrane electrode 14, the anode gas diffusion layer 15, the second current collecting plate 16 and the second insulating plate 17.

[0047] Step S200: Pass the locking screw 3 through the first connecting hole 8 and the through hole in the middle.

[0048] Step S300: Install the pressure-bearing member 6 , the elastic gasket 5 and the locking nut 4 in sequence on the locking screw 3 outside the first end plate 1 .

[0049] Step S400 : rotating the locking nut 4 to apply pressure from the outside of the first end plate 1 toward the second end plate 2 .

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electrolytic cell locking mechanism, characterized in that: include: a first end plate (1); A second end plate (2); as well as A locking device is provided between the first end plate (1) and the second end plate (2), and the locking device is capable of applying a locking force to the first end plate (1) toward the second end plate (2) to offset a force causing the first end plate (1) to bulge outward.

2. The electrolytic cell locking mechanism according to claim 1, characterized in that: The locking device comprises: A locking screw (3) passes through the second end plate (2) and the first end plate (1) in sequence along the axial direction, a first end of the locking screw (3) is connected to the outer side of the second end plate (2), and a second end of the locking screw (3) is located on the outer side of the first end plate (1); A locking nut (4) is connected to the second end of the locking screw (3), and the locking nut (4) is capable of contacting the outer side of the first end plate (1) to apply a locking force from the outer side of the first end plate (1) toward the second end plate (2).

3. The electrolytic cell locking mechanism according to claim 2, characterized in that: Also includes: An elastic gasket (5) is sleeved on the locking screw (3) and is located between the locking nut (4) and the outer side of the first end plate (1).

4. The electrolytic cell locking mechanism according to claim 3, characterized in that: A pressure-bearing member (6) is further provided between the elastic gasket (5) and the outer side of the first end plate (1).

5. The electrolytic cell locking mechanism according to claim 2, characterized in that: A first connecting hole (8) is provided in the middle of each of the first end plate (1) and the second end plate (2), for matching with the locking screw (3).

6. The electrolytic cell locking mechanism according to claim 4, characterized in that: The pressure-bearing member (6) is a circular pressure-bearing block, and the diameter of the pressure-bearing block is larger than the diameter of the locking nut (4).

7. The electrolytic cell locking mechanism according to claim 2, characterized in that: A first insulating plate (10), a first current collecting plate (11), a bipolar plate (12), a cathode gas diffusion layer (13), an MEA membrane electrode (14), an anode gas diffusion layer (15), a second current collecting plate (16), and a second insulating plate (17) are sequentially provided between the first end plate (1) and the second end plate (2); and through holes for the locking screw (3) to pass through are provided in the middle of each of the first insulating plate (10), the first current collecting plate (11), the bipolar plate (12), the cathode gas diffusion layer (13), the MEA membrane electrode (14), the anode gas diffusion layer (15), the second current collecting plate (16), and the second insulating plate (17).

8. An electrolytic cell, characterized in that: It comprises the electrolytic cell locking mechanism as described in any one of claims 1-7.

9. An electrolytic cell according to claim 8, characterized in that: Also includes: A plurality of second connection holes (9) are provided, and the plurality of second connection holes (9) are evenly arranged around the first end plate (1) and the second end plate (2); The fastening bolts (7) are the same in number as the second connection holes (9) and are positioned one-to-one with each other. The first end plate (1) and the second end plate (2) are connected by the fastening bolts (7) passing through the second connection holes (9) of the first end plate (1) and the second end plate (2).

10. An assembly method of an electrolytic cell, applied to the electrolytic cell according to any one of claims 8 to 9, characterized in that: The following steps are involved: Connecting the first end plate (1), the second end plate (2), and the components between the two end plates in sequence; Pass the locking screw (3) through the first connecting hole (8) and the through hole in the middle; Installing a pressure-bearing member (6), an elastic washer (5), and a locking nut (4) in sequence on the locking screw (3) outside the first end plate (1); The rotating locking nut (4) applies pressure from the outside of the first end plate (1) toward the second end plate (2).

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