End assembly and electrolytic cell

Abstract

The application relates to an end assembly and an electrolytic cell, and belongs to the technical field of electrolytic cells. The end assembly comprises an end plate, a first flow passage component and a second flow passage component. The first flow passage component comprises a first channel part provided with a first flow passage hole and a first sealing part abutting against one side of the end plate close to the electrolytic assembly in the installation direction. The second flow passage component comprises a second channel part provided with a second flow passage hole and a second sealing part abutting against one side of the end plate away from the electrolytic assembly in the installation direction. The first flow passage hole and the second flow passage hole constitute at least part of a flow passage connecting both sides of the end plate. The first sealing part and the second sealing part abut against the end plate in the installation direction, so that the first sealing part and the second sealing part can form contact sealing with the end plate, respectively. Thus, the stability of the flow passage can be ensured by preventing the first channel part and the second channel part from being deformed under pressure, thereby improving the sealing effect.

Description

Technical Field

[0001] This application relates to the field of electrolytic cell technology, and in particular to an end component and an electrolytic cell. Background Technology

[0002] Currently, the electrolyzer is the core equipment for hydrogen production by electrolyzing water. It includes electrolysis components and end plates. The end plates are located on the outside of the electrolysis components and have integrated fluid interfaces to guide the reaction liquid into the electrolysis components.

[0003] To prevent the reaction liquid from directly contacting the metal end plate during transportation, the relevant technology uses an isolation sleeve for isolation and achieves sealing through pressure. However, the current isolation sleeve is in a state of overall deformation under pressure, which disrupts the stable contact between the isolation sleeve and the end plate, resulting in poor sealing performance. Utility Model Content

[0004] This application provides an end component to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, an end component is provided, comprising: End plates are configured to be mounted on the outside of the electrolysis components of the electrolytic cell; The first flow-through component is installed along the installation direction on the side of the end plate near the electrolysis assembly; The second flow element is installed along the installation direction on the side of the end plate away from the electrolysis assembly; The first current-passing element includes: The first channel section has a first flow passage; The first sealing part abuts against the side of the end plate near the electrolysis assembly along the installation direction; The second current-passing element includes: The second channel section has a second flow passage; The second sealing part abuts against the side of the end plate away from the electrolysis assembly along the installation direction; The first and second flow holes constitute at least a portion of the flow channel connecting both sides of the end plate.

[0006] In some embodiments, the first sealing portion has: A first sealing surface is disposed in contact with the end plate, and at least a portion of the first sealing surface intersects with the installation direction; And / or, The second sealing part has: The second sealing surface is disposed in contact with the end plate, and at least a portion of the second sealing surface intersects the installation direction.

[0007] In some embodiments, the first sealing portion is disposed at one end of the first channel portion away from the second sealing portion, and the first sealing portion is disposed around the first channel portion; And / or, The second sealing part is located at the end of the second channel portion away from the first sealing part, and the second sealing part is arranged around the second channel portion.

[0008] In some embodiments, the end plate has: Mounting holes extend through the end plate along the mounting direction; The first channel portion and the second channel portion are respectively disposed in the mounting hole.

[0009] In some embodiments, the end plate has the following features on the side near the electrolysis assembly: The first mounting groove is connected to the mounting hole; At least a portion of the first sealing portion is disposed in the first mounting groove; And / or, The side of the end plate away from the electrolysis assembly has: The second mounting slot is connected to the mounting hole; At least a portion of the second sealing portion is disposed in the first mounting groove.

[0010] In some embodiments, the end plate has the following features on the side near the electrolysis assembly: The first mounting groove is connected to the mounting hole; At least a portion of the first sealing portion is disposed in the first mounting groove; in the mounting direction, the thickness of the first sealing portion is greater than or equal to the groove depth of the first mounting groove; And / or, The side of the end plate away from the electrolysis assembly has: The second mounting slot is connected to the mounting hole; At least a portion of the second sealing portion is disposed in the first mounting groove; in the mounting direction, the thickness of the second sealing portion is greater than or equal to the groove depth of the second mounting groove.

[0011] In some embodiments, the first channel portion and the second channel portion are nested together, and at least a portion of the contact interface between the first channel portion and the second channel portion is parallel to the mounting direction.

[0012] In some embodiments, in the mounting direction, the length of the first channel portion is greater than or equal to the length of the second channel portion; In a direction perpendicular to the installation direction, the thickness of the first channel portion is less than or equal to the thickness of the second channel portion.

[0013] In some embodiments, at least a portion of the first channel portion is sleeved on the second channel portion; Alternatively, at least a portion of the second channel portion may be fitted onto the first channel portion.

[0014] In some embodiments, when at least a portion of the first channel portion is fitted onto the second channel portion, a first gap exists between the first channel portion and the second sealing portion along the installation direction.

[0015] In some embodiments, when at least a portion of the second channel portion is fitted onto the first channel portion, the mounting hole has a first wall surface, a second wall surface, and a connecting wall surface, wherein the connecting wall surface connects between the first wall surface and the second wall surface; The first wall surface is in contact with a portion of the first channel portion, and the second wall surface is in contact with at least a portion of the second channel portion; Along the installation direction, there is a second gap between the second channel portion and the connecting wall surface.

[0016] In some embodiments, the end component further includes: A first sealing element is disposed between the first channel portion and the second channel portion; The first flow element has a first sealing groove that accommodates at least a portion of the first seal; and / or, the second flow element has a second sealing groove that accommodates at least a portion of the first seal.

[0017] In some embodiments, the first flow-through element further includes: A transition section connects the first channel section and the first sealing section; The transition portion has a third flow hole communicating with the first flow hole, and the flow area of ​​the third flow hole is greater than that of the first flow hole; there is a gap between the transition portion and the wall of the mounting hole.

[0018] In some embodiments, the end component further includes: An insulating plate is disposed on the side of the end plate near the electrolysis assembly; The second sealing element is located between the insulating plate and the first sealing part; The insulating plate has a first adapter groove that accommodates at least a portion of the second seal; and / or, the first sealing portion has a second adapter groove that accommodates at least a portion of the second seal.

[0019] In some embodiments, the end component further includes: An insulating plate is disposed on the side of the end plate near the electrolysis assembly; The first current-passing component is fixedly connected to the insulating plate.

[0020] According to a second aspect of this application, an electrolytic cell is provided, including the end assembly as described above.

[0021] In the end assembly of this application embodiment, a first flow-through component and a second flow-through component are respectively installed on different sides of the end plate. The first flow-through component includes a first channel portion and a first sealing portion, and the second flow-through component includes a second channel portion and a second sealing portion. The first flow-through hole of the first channel portion and the second flow-through hole of the second channel portion together constitute at least a part of the flow channel, so that the reaction liquid can pass smoothly through the end plate. In this process, the first sealing portion and the second sealing portion abut against the end plate along the installation direction, so that the first sealing portion and the second sealing portion can respectively form a contact seal with the end plate, thereby avoiding the first channel portion and the second channel portion from being deformed by pressure and affecting the stability of the flow channel, thereby improving the sealing effect.

[0022] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] Figure 1 This is an exploded view of the end component provided in an exemplary embodiment of this application; Figure 2 This is a partial cross-sectional view of the end component provided in an exemplary embodiment of this application; Figure 3 This is a cross-sectional schematic diagram of the end component provided in an exemplary embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of the first flow element in the end assembly provided in an exemplary embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of the second flow element in the end assembly provided in an exemplary embodiment of this application; Figure 6 This is a cross-sectional schematic diagram of the end plate in the end assembly provided in an exemplary embodiment of this application; Figure 7This is a cross-sectional schematic diagram of a portion of the end component provided in an exemplary embodiment of this application; Figure 8 yes Figure 7 An enlarged schematic diagram of part A in the middle; Figure 9 This is a cross-sectional schematic diagram of another end component provided in an exemplary embodiment of this application; Figure 10 yes Figure 9 Enlarged schematic diagram of part B; Figure 11 This is a cross-sectional schematic diagram of an end plate in another end component provided in an exemplary embodiment of this application; Figure 12 yes Figure 9 An enlarged schematic diagram of section E in the middle; Figure 13 This is an exploded view of another end component provided in an exemplary embodiment of this application.

[0025] Explanation of reference numerals in the attached figures: 100. End components; 110. End plate; 111. First end face; 112. Second end face; 110a. Mounting hole; 113. First wall surface; 114. Second wall surface; 115. Connecting wall surface; 110b. First mounting groove; 110c. Second mounting groove; 120. First flow-through component; 121. First channel portion; 121a. First flow-through hole; 122. First sealing portion; 122a. First sealing surface; 122b. Third sealing surface; 123. Transition portion; 123a. Third flow-through hole; 130. Second flow-through component; 131. Second channel portion; 131a. Second flow-through hole; 132. Second sealing portion; 132a. Second sealing surface; 132b. Fourth sealing surface; 132c. Second sealing groove; 100a, Overcurrent Channel; 140. First sealing element; 150, Insulating plate; 150a, Cavity opening; 150b, First adapter groove; 160, Second seal; S, Installation direction; C, Central axis; M, Contact interface. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0027] According to the first aspect of this application, referring to Figure 1 and Figure 2 This application provides an end assembly 100 including: an end plate 110, a first flow element 120 and a second flow element 130.

[0028] The end plate 110 is configured to be installed on the outside of the electrolysis assembly of the electrolytic cell; the first flow element 120 is installed on the side of the end plate 110 close to the electrolysis assembly along the installation direction S; the second flow element 130 is installed on the side of the end plate 110 away from the electrolysis assembly along the installation direction S.

[0029] It is understandable that the electrolysis assembly is configured to realize the main reaction of electrolysis, while the end plate 110 provides functions such as clamping and protection on the outside of the electrolysis assembly.

[0030] The installation direction S can be parallel to the stacking direction of the end plate 110 and the electrolysis assembly; more specifically, the installation direction S of this application can be either inward or outward along the entire end assembly 100. For example, the first flow member 120 is installed in the outward direction on the side of the end plate 110 close to the electrolysis assembly, and the second flow member 130 is installed in the inward direction on the side of the end plate 110 away from the electrolysis assembly.

[0031] Reference Figure 2 and Figure 3 The first flow element 120 includes a first channel portion 121 and a first sealing portion 122. The first channel portion 121 has a first flow hole 121a; the first sealing portion 122 abuts against the side of the end plate 110 near the electrolysis assembly along the installation direction S.

[0032] The second flow element 130 includes a second channel portion 131 and a second sealing portion 132. The second channel portion 131 has a second flow hole 131a; the second sealing portion 132 abuts against the side of the end plate 110 away from the electrolysis assembly along the installation direction S.

[0033] The first flow passage 121a and the second flow passage 131a constitute at least a portion of the flow passage 100a connecting both sides of the end plate 110; the shape and size of the first flow passage 121a and the second flow passage 131a are designed according to the actual flow requirements and structural adaptation requirements.

[0034] During the assembly of the electrolytic cell, under the pressure of adjacent assembly parts (such as insulating plate 150, bipolar plate, etc.) of the end assembly 100, the first sealing part 122 and the second sealing part 132 will tightly fit against the end plate 110, effectively preventing leakage of the reaction liquid from the contact points between the end plate 110 and the first flow-through part 120, and between the end plate 110 and the second flow-through part 130, thereby forming a reliable seal. The first channel part 121 and the second channel part 131 cooperate to form a flow-through channel 100a, allowing the reaction liquid to flow along a predetermined path. It is understood that the first channel part 121 and the second channel part 131 are not subjected to pressure from adjacent assembly parts, allowing them to maintain a stable fit, ensuring the stability of the flow-through channel 100a and preventing leakage of the reaction liquid between the first channel part 121 and the second channel part 131.

[0035] Through the above technical solution, by setting a first flow passage 120 and a second flow passage 130, which are respectively installed on different sides of the end plate 110, the first flow passage 120 includes a first channel portion 121 and a first sealing portion 122, and the second flow passage 130 includes a second channel portion 131 and a second sealing portion 132. The first flow passage hole 121a of the first channel portion 121 and the second flow passage hole 131a of the second channel portion 131 together constitute at least a part of the flow passage 100a, so that the reaction liquid can pass smoothly through the end plate 110. In this process, the first sealing portion 122 and the second sealing portion 132 abut against the end plate 110 along the installation direction S, so that the first sealing portion 122 and the second sealing portion 132 can respectively form a contact seal with the end plate 110, thereby avoiding the first channel portion 121 and the second channel portion 131 from being deformed by pressure and affecting the stability of the flow passage 100a, improving the sealing effect, and thus improving the insulation performance of the electrolytic cell.

[0036] Meanwhile, the flow channel 100a is formed by the cooperation of the first flow element 120 and the second flow element 130, which ensures the sealing effect and facilitates the overall assembly of the end assembly 100. In addition, during the assembly of the electrolytic cell, by pre-assembling the first flow element 120 and the second flow element 130 with the end plate 110, the stacking steps can be simplified, which is more conducive to automated stacking.

[0037] In one example of this application, the end component 100 in this embodiment can be applied to a proton exchange membrane (PEM) electrolyzer. Accordingly, the electrolysis component includes membrane electrodes, bipolar plates, gas diffusion layers, etc.

[0038] In some specific embodiments, the first channel portion 121 and the first sealing portion 122 are integrally formed, which can enhance the overall strength and stability of the first flow-through component 120 and reduce the risk of leakage. Similarly, the second channel portion 131 and the second sealing portion 132 also adopt an integrally formed structure.

[0039] In some specific embodiments, the first flow element 120 and the second flow element 130 need to have good insulation and corrosion resistance to resist the erosion of media such as reaction liquids and extend the service life of the components. More specifically, the first flow element 120 and the second flow element 130 can be made of materials such as polyetherimide, polyetheretherketone, polyoxymethylene, and polyphenylene sulfone. The first flow element 120 and the second flow element 130 made of these materials have good elasticity, insulation, and sealing performance, which can effectively prevent fluid leakage from the contact points between the end plate 110 and the first flow element 120 and the second flow element 130.

[0040] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The first sealing part 122 has a first sealing surface 122a. The first sealing surface 122a is disposed in contact with the end plate 110, and at least a portion of the first sealing surface 122a intersects the installation direction S.

[0041] It is understood that at least a portion of the first sealing surface 122a intersects the installation direction S, that is, at least a portion of the first sealing surface 122a intersects the pressure direction of the adjacent assembled parts, thereby ensuring that at least a portion of the first sealing surface 122a can be tightly fitted to the end plate 110 under pressure. The first sealing surface 122a may only partially intersect the installation direction S, or it may intersect the installation direction S entirely. The shape of the first sealing surface 122a can be selected according to sealing and structural design requirements, and is not limited here.

[0042] By adopting the above solution, and limiting the contact method between the first sealing surface 122a and the end plate 110, a reliable sealing fit is formed between the first sealing surface 122a and the end plate 110. At the same time, this intersecting design can disperse the pressure generated during assembly, avoiding seal failure caused by pressure concentration.

[0043] In one example of this application, reference is made to Figure 3 and Figure 4 The entire first sealing surface 122a is perpendicular to the installation direction S.

[0044] In some embodiments of this application, reference is made to Figure 3 and Figure 5The second sealing part 132 has a second sealing surface 132a. The second sealing surface 132a is disposed in contact with the end plate 110, and at least a portion of the second sealing surface 132a intersects the mounting direction S.

[0045] It is understood that at least a portion of the second sealing surface 132a intersects the installation direction S, that is, at least a portion of the second sealing surface 132a intersects the pressure direction of the adjacent assembled parts, thereby ensuring that at least a portion of the second sealing surface 132a can tightly fit against the end plate 110 under pressure. The second sealing surface 132a may only partially intersect the installation direction S, or it may intersect the installation direction S entirely. The shape of the second sealing surface 132a can be selected according to sealing and structural design requirements, and is not limited here.

[0046] By employing the above solution, and by limiting the contact method between the second sealing surface 132a and the end plate 110, a reliable sealing fit is formed between the second sealing surface 132a and the end plate 110. Simultaneously, this intersecting design can disperse the pressure generated during assembly, preventing seal failure caused by pressure concentration.

[0047] In one example of this application, reference is made to Figure 3 and Figure 5 The second sealing surface 132a is perpendicular to the installation direction S.

[0048] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The first sealing portion 122 has a third sealing surface 122b. The third sealing surface 122b is located on the side of the first sealing portion 122 away from the first sealing surface 122a, and the third sealing surface 122b is configured to form a sealing fit with adjacent external assembly parts. The third sealing surface 122b intersects the mounting direction S; more specifically, the entire third sealing surface 122b is perpendicular to the mounting direction S.

[0049] In some embodiments of this application, reference is made to Figure 3 and Figure 5 The second sealing portion 132 has a fourth sealing surface 132b. The fourth sealing surface 132b is located on the side of the second sealing portion 132 away from the second sealing surface 132a, and the fourth sealing surface 132b is configured to form a sealing fit with adjacent external assembly parts. The fourth sealing surface 132b intersects the mounting direction S; more specifically, the entire fourth sealing surface 132b is perpendicular to the mounting direction S.

[0050] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The first sealing part 122 is located at the end of the first channel part 121 away from the second sealing part 132, and the first sealing part 122 is arranged around the first channel part 121.

[0051] By adopting the above solution, and by placing the first sealing part 122 at the end of the first channel portion 121 away from the second sealing part 132, the influence of the deformation of the first sealing part 122 under pressure on the shape of the first channel portion 121 can be reduced. Furthermore, the first sealing part 122 is arranged around the first channel portion 121, forming an annular sealing interface between the first sealing part 122 and the end plate 110, effectively preventing the reaction liquid from entering between the first flow member 120 and the end plate 110, further improving the sealing performance of the end assembly 100. Simultaneously, this surrounding structure also enhances the overall stability of the first flow member 120. When the first flow member 120 is subjected to pressure from adjacent assembled parts, the first sealing part 122 can evenly distribute the pressure, thereby ensuring the stability of the shape and size of the first flow hole 121a.

[0052] In one example of this application, reference is made to Figure 4 The first sealing portion 122 and the first channel portion 121 are arranged around the central axis C. It can be understood that the installation direction S in the embodiments of this application is parallel to the central axis C.

[0053] In some embodiments of this application, reference is made to Figure 3 and Figure 5 The second sealing part 132 is located at the end of the second channel part 131 away from the first sealing part 122, and the second sealing part 132 is arranged around the second channel part 131.

[0054] By adopting the above solution, and by placing the second sealing part 132 at the end of the second channel portion 131 away from the first sealing part 122, the influence of the deformation of the second sealing part 132 under pressure on the shape of the second channel portion 131 can be reduced. Furthermore, the second sealing part 132 is arranged around the second channel portion 131, forming an annular sealing interface between the second sealing part 132 and the end plate 110, effectively preventing the reaction liquid from entering between the second flow member 130 and the end plate 110, further improving the sealing performance of the end assembly 100. Simultaneously, this surrounding structure also enhances the overall stability of the second flow member 130. When the second flow member 130 is subjected to pressure from adjacent assembled parts, the second sealing part 132 can evenly distribute the pressure, thereby ensuring the stability of the shape and size of the second flow hole 131a.

[0055] In one example of this application, reference is made to Figure 5 The second sealing part 132 and the second channel part 131 are arranged around the central axis C.

[0056] In some embodiments of this application, reference is made to Figure 2 and Figure 3The end plate 110 has a mounting hole 110a. The mounting hole 110a extends through the end plate 110 along the mounting direction S; a first channel portion 121 and a second channel portion 131 are respectively disposed in the mounting hole 110a.

[0057] By adopting the above scheme, the first channel portion 121 and the second channel portion 131 are positioned and installed through the setting of the mounting hole 110a, which can ensure the installation accuracy of the first flow-through component 120 and the second flow-through component 130 on the end plate 110.

[0058] In some specific embodiments, the size (diameter and depth, etc.) and shape of the mounting hole 110a are adapted to the first channel portion 121 and the second channel portion 131, so that the first channel portion 121 and the second channel portion 131 can be tightly disposed in the mounting hole 110a, preventing offset or shaking during assembly, thereby ensuring that the first flow hole 121a and the second flow hole 131a can be accurately aligned to form a stable flow channel 100a.

[0059] In one example of this application, reference is made to Figure 1 The end plate 110 is provided with at least two mounting holes 110a, so that multiple sets of first flow elements 120 and second flow elements 130 can be installed.

[0060] In some embodiments of this application, reference is made to Figure 3 and Figure 6 The end plate 110 has a first mounting groove 110b on the side near the electrolysis assembly. The first mounting groove 110b is connected to the mounting hole 110a; at least a portion of the first sealing part 122 is disposed in the first mounting groove 110b.

[0061] By adopting the above solution, the first mounting groove 110b provides a precise installation position for the first sealing part 122, allowing the first sealing part 122 to be securely mounted on the end plate 110. Furthermore, since the first mounting groove 110b is connected to the mounting hole 110a, this facilitates guidance of the first channel part 121 during assembly, ensuring the accurate installation of the first flow-through component 120.

[0062] In one example of this application, reference is made to Figure 6 The first mounting groove 110b is arranged around the mounting hole 110a. In the direction perpendicular to the central axis C, the size of the first mounting groove 110b is larger than the size of the mounting hole 110a.

[0063] In some embodiments of this application, reference is made to Figure 3 and Figure 6The end plate 110 has a second mounting groove 110c on the side away from the electrolysis assembly. The second mounting groove 110c communicates with the mounting hole 110a; at least a portion of the second sealing part 132 is disposed in the first mounting groove 110b.

[0064] By adopting the above solution, the second mounting groove 110c provides a precise installation position for the second sealing part 132, allowing the second sealing part 132 to be securely mounted on the end plate 110. Furthermore, since the second mounting groove 110c is connected to the mounting hole 110a, it helps guide the second channel part 131 during assembly, ensuring the accurate installation of the second flow-through component 130.

[0065] In one example of this application, reference is made to Figure 6 The second mounting groove 110c is arranged around the mounting hole 110a. In the direction perpendicular to the central axis C, the size of the second mounting groove 110c is larger than the size of the mounting hole 110a.

[0066] In some embodiments of this application, in the installation direction S, the thickness of the first sealing portion 122 is greater than or equal to the groove depth of the first mounting groove 110b.

[0067] The above dimensional design ensures that the first sealing part 122 has a good sealing effect after installation. When the thickness of the first sealing part 122 is equal to the depth of the first mounting groove 110b, the first sealing part 122 can just fill the first mounting groove 110b, effectively preventing the reaction liquid from leaking from the first mounting groove 110b. When the thickness of the first sealing part 122 is greater than the depth of the first mounting groove 110b, the first sealing part 122 will be subjected to a certain degree of compression during installation. This compression will cause the first sealing part 122 to deform, thereby making the first sealing part 122 fit more tightly against the first mounting groove 110b and adjacent assembled parts, further enhancing the sealing performance and effectively avoiding leakage problems caused by poor sealing.

[0068] In one example of this application, the thickness of the first sealing part 122 in the unpressurized state is greater than the groove depth of the first mounting groove 110b, while the thickness of the first sealing part 122 in the pressurized state is equal to the groove depth of the first mounting groove 110b.

[0069] In some embodiments of this application, in the installation direction S, the thickness of the second sealing portion 132 is greater than or equal to the groove depth of the second mounting groove 110c.

[0070] The above dimensional design ensures that the second sealing part 132 has a good sealing effect after installation. When the thickness of the second sealing part 132 is equal to the depth of the second mounting groove 110c, the second sealing part 132 can just fill the second mounting groove 110c, effectively preventing the reaction liquid from leaking from the second mounting groove 110c. When the thickness of the second sealing part 132 is greater than the depth of the second mounting groove 110c, the second sealing part 132 will be subjected to a certain degree of compression during installation. This compression will cause the second sealing part 132 to deform, thereby making the second sealing part 132 fit more tightly against the second mounting groove 110c and adjacent assembled parts, further enhancing the sealing performance and effectively avoiding leakage problems caused by poor sealing.

[0071] In one example of this application, the thickness of the second sealing portion 132 in the unpressurized state is greater than the groove depth of the second mounting groove 110c, while the thickness of the second sealing portion 132 in the pressurized state is equal to the groove depth of the second mounting groove 110c.

[0072] In one example of this application, the end plate 110 has a first end face 111 and a second end face 112 disposed opposite to each other along the mounting direction S, and the entire end plate 110 is located between the first end face 111 and the second end face 112. The side of the first sealing portion 122 away from the second sealing portion 132 is flush with the first end face 111, and the side of the second sealing portion 132 away from the first sealing portion 122 is flush with the second end face 112.

[0073] In some embodiments of this application, reference is made to Figure 7 and Figure 8 The first channel portion 121 and the second channel portion 131 are nested together, and at least a portion of the contact interface M of the first channel portion 121 and the second channel portion 131 is parallel to the installation direction S.

[0074] It is understood that at least a portion of the first channel portion 121 and at least a portion of the second channel portion 131 are in contact to form a contact interface M. That is, there may be an interaction force or no interaction force between the first channel portion 121 and the second channel portion 131 at the contact interface M. The contact interface M can be understood as the physical boundary or transition area between the first channel portion 121 and the second channel portion 131. The first channel portion 121 and the second channel portion 131 form a seal at the contact interface M.

[0075] By adopting the above scheme, the nested cooperation of the first channel portion 121 and the second channel portion 131 facilitates the mutual positioning of the first channel portion 121 and the second channel portion 131, makes the assembly of the first flow-through component 120 and the second flow-through component 130 easier, and ensures accurate alignment of the first flow-through hole 121a and the second flow-through hole 131a, forming a smooth flow-through channel 100a. Simultaneously, by ensuring that the contact interface M of the first channel portion 121 and the second channel portion 131 is parallel to the installation direction S, the sealing effect of the contact interface M is guaranteed, while improving the structural compactness of the first channel portion 121 and the second channel portion 131.

[0076] In some specific embodiments, the contact interface M between the first channel portion 121 and the second channel portion 131 can be set to one of the following: circle, polygon, etc., without specific limitation. It is necessary to ensure the stability of the first channel portion 121 and the second channel portion 131 when nested and the smooth flow of the flow channel 100a.

[0077] In some embodiments of this application, reference is made to Figure 4 and Figure 5 In the installation direction S, the length L1 of the first channel portion 121 is greater than or equal to the length L2 of the second channel portion 131. In the direction perpendicular to the installation direction S, the thickness T1 of the first channel portion 121 is less than or equal to the thickness T2 of the second channel portion 131.

[0078] It is understandable that, compared to the first channel portion 121, the second channel portion 131 is shorter and thicker, which gives the second channel portion 131 greater structural strength and stability, while the first channel portion 121 has better adaptability. Thus, through the difference in design between the first channel portion 121 and the second channel portion 131, it can be ensured that the second channel portion 131 and the first channel portion 121 can smoothly form a nested fit, which is beneficial to improving assembly efficiency.

[0079] In some embodiments of this application, reference is made to Figure 7 and Figure 8 At least a portion of the first channel section 121 is fitted onto the second channel section 131.

[0080] Specifically, along the installation direction S, there is a first gap D1 between the first channel portion 121 and the second sealing portion 132. This ensures that the second sealing portion 132 and the first channel portion 121 can be fitted together while the first channel portion 121 is fitted onto the second channel portion 131. This prevents interaction forces between the second sealing portion 132 and the first channel portion 121, ensuring that the structure and performance of the second sealing portion 132 and the first channel portion 121 are not affected, thereby guaranteeing the stability and reliability of the flow channel 100a.

[0081] In other embodiments of this application, reference is made to Figure 9 and Figure 10 At least a portion of the second channel section 131 is fitted onto the first channel section 121.

[0082] Specifically, refer to Figures 9 to 11 The mounting hole 110a has a first wall surface 113, a second wall surface 114, and a connecting wall surface 115. The connecting wall surface 115 connects between the first wall surface 113 and the second wall surface 114, such that the hole wall of the mounting hole 110a forms a stepped structure. The first wall surface 113 is in partial contact with the first channel portion 121, and the second wall surface 114 is in at least partial contact with the second channel portion 131. Along the mounting direction S, there is a second distance D2 between the second channel portion 131 and the connecting wall surface 115.

[0083] By adopting the above solution, while ensuring that the second channel section 131 is fitted with the first channel section 121, the interaction force between the connecting wall 115 and the second channel section 131 can be avoided, ensuring that the structure and performance of the second channel section 131 are not affected. At the same time, this stepped mounting hole 110a design can better position and support the first channel section 121 and the second channel section 131, thereby ensuring the stability and reliability of the flow channel 100a.

[0084] In some embodiments of this application, reference is made to Figure 7 and Figure 8 The end assembly 100 further includes a first seal 140. The first seal 140 is disposed between the first channel portion 121 and the second channel portion 131.

[0085] By adopting the above solution, the first sealing element 140 is provided to further prevent the reaction liquid from leaking between the first channel portion 121 and the second channel portion 131, thereby enhancing the sealing performance between the first channel portion 121 and the second channel portion 131; at the same time, the processing requirements of the first channel portion 121 and the second channel portion 131 can also be reduced.

[0086] It should be noted that the first channel portion 121 and the second channel portion 131 can be sealed by the first sealing member 140 alone, or the first channel portion 121 and the second channel portion 131 can form a first seal by the first sealing member 140 while there is also an interaction force between the first channel portion 121 and the second channel portion 131 to form a second seal; more specifically, the direction of the interaction force between the first channel portion 121 and the second channel portion 131 is set in a direction perpendicular to the central axis C.

[0087] In one example of this application, reference is made to Figure 7 and Figure 8The contact interface M between the first channel portion 121 and the second channel portion 131 is circular, and the first sealing element 140 is disposed at the contact interface M to facilitate the assembly of the first channel portion 121, the O-ring, and the second channel portion 131. More specifically, the first sealing element 140 may be an O-ring.

[0088] In some embodiments of this application, the first flow element 120 has a first sealing groove that accommodates at least a portion of the first seal element 140.

[0089] It is understood that the depth and width of the first sealing groove are adapted to the dimensions of the first seal 140 to ensure that the first seal 140 can be stably installed in the first sealing groove.

[0090] By adopting the above solution, the installation position of the first sealing member 140 can be effectively limited by the setting of the first sealing groove, preventing it from shifting or falling off, thereby better ensuring the sealing effect between the first channel portion 121 and the second channel portion 131.

[0091] In one example of this application, the first sealing groove is disposed on the side wall of the first channel portion 121 near the second channel portion 131, and the first sealing groove is disposed around the first channel portion 121.

[0092] In some embodiments of this application, reference is made to Figure 5 and Figure 8 The second flow element 130 has a second sealing groove 132c that accommodates at least a portion of the first seal 140.

[0093] By adopting the above solution, the installation position of the second sealing member 160 can be effectively limited by the setting of the second sealing groove 132c, preventing it from shifting or falling off, thereby better ensuring the sealing effect between the first channel portion 121 and the second channel portion 131.

[0094] In one example of this application, reference is made to Figure 5 and Figure 8 The second sealing groove 132c is disposed on the side wall of the second channel portion 131 near the first channel portion 121, and the second sealing groove 132c is disposed around the second channel portion 131.

[0095] It should be noted that the first sealing groove can be provided only in the first flow passage 120 to cooperate with the first seal 140; or the second sealing groove 132c can be provided only in the second flow passage 130 to cooperate with the first seal 140; or, the first sealing groove can be provided in the first flow passage 120 and the second sealing groove 132c can be provided in the second flow passage 130, with a part of the first seal 140 located in the first sealing groove and the other part located in the second sealing groove 132c.

[0096] In some embodiments of this application, reference is made to Figure 3 and Figure 4 The first flow element 120 also includes a transition section 123.

[0097] The transition portion 123 is connected between the first channel portion 121 and the first sealing portion 122; the transition portion 123 has a third flow hole 123a communicating with the first flow hole 121a, and the flow area of ​​the third flow hole 123a is greater than the flow area of ​​the first flow hole 121a; there is a gap Q between the transition portion 123 and the wall of the mounting hole 110a.

[0098] By adopting the above scheme, the transition section 123 defines the third flow hole 123a, and the flow area of ​​the third flow hole 123a is larger than that of the first flow hole 121a, which can buffer and regulate the flow rate of the reaction liquid. At the same time, the gap Q between the transition section 123 and the wall of the mounting hole 110a provides a buffer space for the displacement and deformation of the transition section 123, reducing the impact of the transition section 123 on the first channel section 121; furthermore, the gap Q can also release the deformation transmitted by the first sealing section 122 under pressure, further ensuring the stability and reliability of the first channel section 121.

[0099] It should be noted that in actual design, the shape and size of the transition portion 123 can be optimized according to specific scenarios and design requirements. For example, the transition portion 123 can be consistent with the contour of the cavity 150a on the adjacent insulating plate 150.

[0100] In one example of this application, reference is made to Figure 3 and Figure 4 The flow area of ​​the first flow passage 121a can be the cross-sectional area of ​​the first flow passage 121a, and the flow area of ​​the second flow passage 131a can be the cross-sectional area of ​​the second flow passage 131a.

[0101] In some embodiments of this application, reference is made to Figure 9 and Figure 12 The end assembly 100 further includes an insulating plate 150 and a second seal 160. The insulating plate 150 is disposed on the side of the end plate 110 near the electrolysis assembly, thereby isolating the first end face 111 of the end plate 110 from the electrolysis assembly. The second seal 160 is located between the insulating plate 150 and the first sealing portion 122.

[0102] By adopting the above solution and by setting the second sealing element 160, the sealing performance between the insulating plate 150 and the first sealing part 122 can be further enhanced, preventing leakage of the reaction liquid and ensuring the safety and stability of the entire end assembly 100.

[0103] It should be noted that in this embodiment, the first flow-through component 120 and the insulating plate 150 are independent of each other, but they are in contact and cooperate with each other in the assembled state.

[0104] The shape and size of the second seal 160 also need to be designed reasonably according to the actual situation. For example, the second seal 160 can be annular, matching the contact area of ​​the insulating plate 150 and the first sealing part 122 to ensure complete sealing.

[0105] In some embodiments of this application, reference is made to Figure 9 and Figure 12 The insulating plate 150 has a first adapter groove 150b that accommodates at least a portion of the second seal 160. The first adapter groove 150b defines the installation position of the second seal 160, preventing misalignment and ensuring sealing performance.

[0106] In some embodiments of this application, reference is made to Figures 1 to 3 The first sealing portion 122 has a second adapter groove that accommodates at least a portion of the second sealing member 160. The second adapter groove defines the installation position of the second sealing member 160, preventing misalignment and ensuring sealing performance.

[0107] It should be noted that the first adapter groove 150b can be provided only on the insulating plate 150 to cooperate with the second seal 160; or the second adapter groove can be provided only on the first sealing part 122 to cooperate with the second seal 160; or, the first adapter groove 150b can be provided on the insulating plate 150, and the second adapter groove can be provided on the first sealing part 122, with a part of the second seal 160 located in the first adapter groove 150b and the other part located in the second adapter groove.

[0108] In some embodiments of this application, reference is made to Figure 13 The end assembly 100 also includes an insulating plate 150. The insulating plate 150 is disposed on the side of the end plate 110 near the electrolysis assembly; the first current-passing element 120 is fixedly connected to the insulating plate 150.

[0109] By adopting the above scheme, the first flow-through component 120 is fixedly connected to the insulating plate 150, making the structure of the end component 100 more compact and reasonable, and also facilitating the assembly and maintenance of the end component 100.

[0110] In some specific embodiments, at least two first current-passing elements 120 are fixedly connected to the insulating plate 150.

[0111] In one example of this application, reference is made to Figure 13The first flow-through component 120 can be integrally formed with the insulating plate 150, and at least a portion of the insulating plate 150 serves as the first sealing portion 122 of the first flow-through component 120. In this example, the number of parts in the end assembly 100 can be reduced, thereby simplifying the assembly process and improving assembly efficiency.

[0112] In another example of this application, the first sealing part 122 may also be bonded or welded to the insulating plate 150.

[0113] The following describes, exemplarily, at least a portion of the assembly process of the end component 100 in an embodiment of this application: First, align and insert the first channel portion 121 of the first current-flow component 120 into the mounting hole 110a from the side of the end plate 110 near the electrolysis assembly, and embed the first sealing portion 122 into the first mounting groove 110b until the first sealing portion 122 is tightly fitted to the bottom wall of the first mounting groove 110b. Then, insert the second channel portion 131 of the second current-flow component 130 into the mounting hole 110a from the side of the end plate 110 away from the electrolysis assembly, so that the second channel portion 131 and the first channel portion 121 form a nested fit, and embed the second sealing portion 132 into the second mounting groove 110c until the second sealing portion 132 is tightly fitted to the bottom wall of the second mounting groove 110c. After completing the assembly of the first current-flow component 120 and the second current-flow component 130 with the end plate 110, install the insulating plate 150 on the side of the end plate 110 near the electrolysis assembly.

[0114] According to a second aspect of this application, an electrolytic cell is provided, which includes the aforementioned end assembly 100. This electrolytic cell possesses all the beneficial effects of the aforementioned end assembly 100, which will not be elaborated further herein.

[0115] In this embodiment of the application, the electrolyzer can be a proton exchange membrane (PEM) electrolyzer.

[0116] It should be noted that the above-mentioned end component 100 can also be applied to other types of electrolyzers, such as alkaline (ALK) electrolyzers and anion exchange membrane (AEM) electrolyzers.

[0117] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0118] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0119] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0120] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An end assembly (100), characterized in that, include: End plate (110) is configured to be mounted on the outside of the electrolysis assembly of the electrolytic cell; The first flow element (120) is installed along the installation direction (S) on the side of the end plate (110) near the electrolysis assembly; The second flow element (130) is mounted along the mounting direction (S) on the side of the end plate (110) away from the electrolysis assembly; The first flow element (120) includes: The first channel portion (121) has a first flow hole (121a); The first sealing part (122) abuts against the side of the end plate (110) near the electrolysis assembly along the installation direction (S); The second flow element (130) includes: The second channel section (131) has a second flow hole (131a). The second sealing part (132) abuts against the side of the end plate (110) away from the electrolysis assembly along the installation direction (S); The first flow passage (121a) and the second flow passage (131a) constitute at least a portion of the flow passage (100a) connecting both sides of the end plate (110).

2. The end assembly (100) according to claim 1, characterized in that, The first sealing part (122) has: A first sealing surface (122a) is disposed in contact with the end plate (110), and at least a portion of the first sealing surface (122a) intersects the mounting direction (S); And / or, The second sealing part (132) has: The second sealing surface (132a) is disposed in contact with the end plate (110), and at least a portion of the second sealing surface (132a) intersects the mounting direction (S).

3. The end assembly (100) according to claim 1, characterized in that, The first sealing part (122) is disposed at one end of the first channel part (121) away from the second sealing part (132), and the first sealing part (122) is disposed around the first channel part (121); And / or, The second sealing part (132) is located at one end of the second channel part (131) away from the first sealing part (122), and the second sealing part (132) is arranged around the second channel part (131).

4. The end assembly (100) according to claim 1, characterized in that, The end plate (110) has: Mounting hole (110a) passes through end plate (110) along the mounting direction (S). The first channel portion (121) and the second channel portion (131) are respectively disposed in the mounting hole (110a).

5. The end assembly (100) according to claim 4, characterized in that, The end plate (110) has the following features on the side near the electrolysis assembly: The first mounting groove (110b) is connected to the mounting hole (110a); At least a portion of the first sealing part (122) is disposed in the first mounting groove (110b); And / or, The end plate (110) on the side away from the electrolysis assembly has: The second mounting groove (110c) is connected to the mounting hole (110a); At least a portion of the second sealing part (132) is disposed in the first mounting groove (110b).

6. The end assembly (100) according to claim 4, characterized in that, The end plate (110) has the following features on the side near the electrolysis assembly: The first mounting groove (110b) is connected to the mounting hole (110a); At least a portion of the first sealing part (122) is disposed in the first mounting groove (110b); in the mounting direction (S), the thickness of the first sealing part (122) is greater than or equal to the groove depth of the first mounting groove (110b); And / or, The end plate (110) on the side away from the electrolysis assembly has: The second mounting groove (110c) is connected to the mounting hole (110a); At least a portion of the second sealing part (132) is disposed in the first mounting groove (110b); in the mounting direction (S), the thickness of the second sealing part (132) is greater than or equal to the groove depth of the second mounting groove (110c).

7. The end assembly (100) according to claim 4, characterized in that, The first channel portion (121) and the second channel portion (131) are nested together, and at least a portion of the contact interface (M) of the first channel portion (121) and the second channel portion (131) is parallel to the mounting direction (S).

8. The end assembly (100) according to claim 7, characterized in that, In the mounting direction (S), the length of the first channel portion (121) is greater than or equal to the length of the second channel portion (131); In a direction perpendicular to the mounting direction (S), the thickness of the first channel portion (121) is less than or equal to the thickness of the second channel portion (131).

9. The end assembly (100) according to claim 8, characterized in that, At least a portion of the first channel portion (121) is fitted onto the second channel portion (131). Alternatively, at least a portion of the second channel portion (131) may be fitted onto the first channel portion (121).

10. The end assembly (100) according to claim 9, characterized in that, When at least a portion of the first channel portion (121) is fitted onto the second channel portion (131), a first gap exists between the first channel portion (121) and the second sealing portion (132) along the installation direction (S).

11. The end assembly (100) according to claim 8, characterized in that, When at least a portion of the second channel portion (131) is fitted onto the first channel portion (121), the mounting hole (110a) has a first wall surface (113), a second wall surface (114) and a connecting wall surface (115), the connecting wall surface (115) being connected between the first wall surface (113) and the second wall surface (114); The first wall surface (113) is in contact with a portion of the first channel portion (121), and the second wall surface (114) is in contact with at least a portion of the second channel portion (131); Along the installation direction (S), there is a second gap between the second channel portion (131) and the connecting wall surface (115).

12. The end assembly (100) according to claim 7, characterized in that, The end assembly (100) also includes: A first sealing element (140) is disposed between the first channel portion (121) and the second channel portion (131); The first flow element (120) has a first sealing groove that accommodates at least a portion of the first seal (140); and / or, the second flow element (130) has a second sealing groove (132c) that accommodates at least a portion of the first seal (140).

13. The end assembly (100) according to claim 4, characterized in that, The first flow element (120) further includes: The transition portion (123) is connected between the first channel portion (121) and the first sealing portion (122); The transition portion (123) has a third flow hole (123a) communicating with the first flow hole (121a), and the flow area of ​​the third flow hole (123a) is greater than the flow area of ​​the first flow hole (121a); ​​there is a gap between the transition portion (123) and the wall of the mounting hole (110a).

14. The end assembly (100) according to any one of claims 1 to 13, characterized in that, The end assembly (100) also includes: An insulating plate (150) is disposed on the side of the end plate (110) near the electrolysis assembly; The second sealing element (160) is located between the insulating plate (150) and the first sealing part (122); The insulating plate (150) has a first adapter groove (150b) that accommodates at least a portion of the second seal (160); and / or, the first sealing portion (122) has a second adapter groove that accommodates at least a portion of the second seal (160).

15. The end assembly (100) according to any one of claims 1 to 13, characterized in that, The end assembly (100) also includes: An insulating plate (150) is disposed on the side of the end plate (110) near the electrolysis assembly; The first flow-through component (120) is fixedly connected to the insulating plate (150).

16. An electrolytic cell, characterized in that, Includes the end assembly (100) as described in any one of claims 1 to 15.

Images