Electrolytic bath, hydrogen production system and hydrogen production station

Abstract

The utility model discloses an electrolytic bath, a hydrogen production system and a hydrogen production station, and belongs to the technical field of electrolytic hydrogen production. The electrolytic bath comprises a plurality of electrode plates which are arranged in a stacked mode in the first direction; the electrode plate comprises a plurality of electrode frames and at least one sealing gasket, the sealing gasket is arranged between the electrode frames of two adjacent electrode plates, the at least one sealing gasket and the plurality of electrode frames form an alkali liquor flow channel, the alkali liquor flow channel comprises a plurality of sections, and at least two sections of the alkali liquor flow channel are bent. According to the electrolytic bath provided by the invention, the at least two sections in the alkali liquor flow channel are set to be bent, so that the current path length of current in the alkali liquor flow channel can be increased, the bypass current is reduced, and the current efficiency loss caused by the electrode plates in the electrolysis process is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of electrolytic hydrogen production, and in particular, relates to an electrolyzer, a hydrogen production system and a hydrogen production station. Background Art

[0002] In electrolytic cell technology, after the electrolytic cell pole frame and insulating gasket are assembled, a through alkali solution flow channel is formed to ensure that the alkali solution is evenly distributed during the electrolysis process. In this structure, the flow channel holes on the pole frame are precisely aligned with the flow channel holes on the insulating gasket to achieve smooth circulation of the alkali solution. However, the alkali solution flow channel not only allows the alkali solution to pass through, but also provides a conduction path for the current. This unexpected current path, namely "bypass current", leads to a significant loss of effective current inside the electrolytic cell, thereby reducing the overall energy efficiency of the electrolytic cell. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an electrolyzer, a hydrogen production system and a hydrogen production station, which can increase the current path length of the current in the alkali solution flow channel by setting at least two sections in the alkali solution flow channel to be bent, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0004] In a first aspect, the present application provides an electrolytic cell, comprising:

[0005] A plurality of electrode plates, wherein the plurality of electrode plates are stacked along a first direction;

[0006] At least one sealing gasket is installed between the pole frames of two adjacent electrode plates, and the at least one sealing gasket and the plurality of pole frames form an alkali liquid flow channel, the alkali liquid flow channel includes multiple sections, and at least two sections of the alkali liquid flow channel are bent.

[0007] According to the electrolytic cell provided in the embodiment of the present application, by setting at least two sections in the alkali solution flow channel to be bent, the current path length of the current in the alkali solution flow channel can be increased, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0008] According to one embodiment of the present application, the pole frame is provided with a first flow channel hole extending along the first direction, the sealing gasket is provided with a second flow channel hole extending along the first direction, the axis of the first flow channel hole is aligned with the axis of the second flow channel hole, the first flow channel hole and the second flow channel hole form the alkali liquid flow channel, and at least part of the aperture of the second flow channel hole is smaller than the aperture of the first flow channel hole.

[0009] According to one embodiment of the present application, the aperture of the second flow channel hole is smaller than the aperture of the first flow channel hole.

[0010] According to an embodiment of the present application, the inner wall surface of the second flow channel hole is an arc-shaped surface, and the center of curvature of the arc-shaped surface is located at the outer periphery of the second flow channel hole.

[0011] According to one embodiment of the present application, there are multiple sealing gaskets, each of which is provided with a third flow channel hole extending along the first direction, and the third flow channel holes of two adjacent sealing gaskets are staggered in the circumferential direction, and the pole frame is provided with a fourth flow channel hole, and the third flow channel holes of the sealing gaskets located at both ends of the pole frame are connected to the corresponding fourth flow channel holes.

[0012] According to an embodiment of the present application, a groove is provided on the end surface of the pole frame, and two ends of the groove are respectively connected to the fourth flow channel hole and the electrolysis chamber of the electrode plate.

[0013] According to an embodiment of the present application, the groove is located at a position where the fourth flow channel hole is close to the third flow channel hole located upstream along the flow direction of the alkali solution.

[0014] According to one embodiment of the present application, there are a plurality of alkali solution flow channels, and the plurality of alkali solution flow channels are distributed at intervals along the circumference of the pole frame.

[0015] In a second aspect, the present application provides a hydrogen production system, the hydrogen production system comprising:

[0016] An electrolytic cell as described in any one of the above.

[0017] According to the hydrogen production system provided in the embodiment of the present application, by adopting any of the above-mentioned electrolytic cells, the current path length of the current in the alkaline solution flow channel can be increased, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0018] In a third aspect, the present application provides a hydrogen production station, which includes:

[0019] Renewable energy generation systems;

[0020] In any of the above hydrogen production systems, the output end of the renewable energy power generation system is electrically connected to the input end of the hydrogen production system.

[0021] According to the hydrogen production station provided in the embodiment of the present application, by adopting any of the above-mentioned hydrogen production systems, the current path length of the current in the alkaline solution flow channel can be increased, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is one of the structural schematic diagrams of the electrolytic cell provided in the embodiment of the present application;

[0025] Figure 2 It is one of the exploded views of the electrolytic cell provided in the embodiment of the present application;

[0026] Figure 3 It is one of the partial structural schematic diagrams of the electrolytic cell provided in the embodiment of the present application;

[0027] Figure 4 is a cross-sectional view of an electrolytic cell provided in an embodiment of the present application;

[0028] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0029] Figure 6 is a schematic diagram of the current path of the electrolytic cell provided in an embodiment of the present application;

[0030] Figure 7 This is one of the structural schematic diagrams of the sealing gasket of the electrolytic cell provided in the embodiment of the present application;

[0031] Figure 8 It is a schematic diagram of the alkali solution flow channel of the electrolytic cell provided in an embodiment of the present application;

[0032] Fig. 9 This is the second exploded view of the electrolytic cell provided in the embodiment of the present application;

[0033] Fig.10 It is a schematic structural diagram of an electrode frame of an electrolytic cell provided in an embodiment of the present application;

[0034] Fig.11 This is the second structural schematic diagram of the sealing gasket of the electrolytic cell provided in the embodiment of the present application.

[0035] Reference numerals:

[0036] The pole frame 100, the first hydrogen outlet 110, the first oxygen outlet 120, the groove 130, the first flow channel hole 140, and the fourth flow channel hole 150;

[0037] Sealing gasket 200, second hydrogen outlet 210, second oxygen outlet 220, second flow channel hole 230, third flow channel hole 240;

[0038] Alkaline solution flow channel 300 and electrode plate 400. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] Reference below Figure 1-Figure 11 An electrolyzer, an electrolyzer, and a hydrogen production system according to embodiments of the present application are described.

[0041] An electrolytic cell provided in an embodiment of the present application is as follows: Figure 1-Figure 11 As shown, the electrolytic cell includes a plurality of electrode plates and at least one sealing gasket 200 .

[0042] Among them, Figure 1-Figure 11 As shown, the electrode plate includes an electrode frame 100 and an electrode plate 400. The electrode frame 100 may be a rectangular structure, a trapezoidal structure or other shapes. For example, the electrode frame 100 is a circular ring structure.

[0043] like Figure 1-Figure 11 As shown, the pole frame 100 is installed on the outer periphery of the pole plate 400, and the pole plate 400 defines an electrolysis chamber for electrolysis reaction.

[0044] like Figure 1-Figure 11 As shown, a plurality of electrode plates are stacked along a first direction, and the first direction may be an axial direction of the electrode plates, that is, a plurality of electrode plates are stacked along their own axial direction.

[0045] like Figure 1-Figure 11 As shown, the pole frame 100 may be provided with a first oxygen outlet 120 and a first hydrogen outlet 110 , and both the first oxygen outlet 120 and the first hydrogen outlet 110 are connected to the electrolysis chamber.

[0046] like Figure 1-Figure 11 As shown, a sealing gasket 200 is installed between the pole frames 100 of two adjacent electrode plates. When there are two pole frames 100, one sealing gasket 200 can be provided, and one sealing gasket 200 is located between the two pole frames 100; when there are three pole frames 100, two sealing gaskets 200 can be provided, and two sealing gaskets 200 are alternately provided with three pole frames 100, and the sealing gasket 200 is located between two adjacent pole frames 100, and so on.

[0047] like Figure 1-Figure 11 As shown, at least one sealing gasket 200 and multiple pole frames 100 form an alkali solution flow channel 300, and the alkali solution flow channel 300 can axially penetrate multiple pole frames 100 and at least one sealing gasket 200, and the alkali solution flow channel 300 is connected to the electrolysis chamber defined by the pole plate 400.

[0048] like Figure 1-Figure 11 As shown, the sealing gasket 200 is also provided with a second oxygen outlet 220 and a second hydrogen outlet 210 corresponding to the first oxygen outlet 120 and the first hydrogen outlet 110 respectively.

[0049] like Figure 1-Figure 11 As shown, the alkali liquid flow channel 300 includes multiple sections, and at least two sections of the alkali liquid flow channel 300 are bent. The two bent sections of the alkali liquid flow channel 300 can be at an acute angle, an obtuse angle or a right angle. The two bent sections of the alkali liquid flow channel 300 can also be rounded or have other shapes.

[0050] In the actual implementation process, Figure 1-Figure 11 As shown, when it is necessary to produce hydrogen by electrolysis, alkali solution is injected into the alkali solution flow channel 300, and flows into the electrolysis chamber from the alkali solution flow channel 300, and the alkali solution undergoes an electrolysis reaction in the electrolysis chamber to produce hydrogen and oxygen, and the hydrogen is discharged from the first hydrogen outlet 110, and the oxygen is discharged from the second oxygen outlet 220. In the process of the alkali solution flowing through the alkali solution flow channel 300, since at least two sections of the alkali solution flow channel 300 are bent, the flow path of the alkali solution in the alkali solution flow channel 300 is also bent. Similarly, the flow path of the electric current in the alkali solution flow channel 300 is also bent.

[0051] When the starting point and the end point are the same, the meandering flow path is longer than the straight flow path. According to the resistance calculation formula R=ρL / S, where ρ is the resistivity, L is the current path length, and S is the current path cross-sectional area, increasing the current path length L can increase the resistance in the flow channel to reduce the bypass current.

[0052] According to the electrolytic cell provided in the embodiment of the present application, by setting at least two sections in the alkali solution flow channel 300 to be bent, the current path length of the current in the alkali solution flow channel 300 can be increased, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0053] In some embodiments, Figure 1-Figure 7 As shown, the pole frame 100 is provided with a first flow channel hole 140 extending along a first direction, and the sealing gasket 200 is provided with a second flow channel hole 230 extending along the first direction. The axes of the first flow channel hole 140 and the second flow channel hole 230 are aligned, and the first flow channel hole 140 and the second flow channel hole 230 form an alkaline liquid flow channel 300, and at least part of the aperture of the second flow channel hole 230 is smaller than the aperture of the first flow channel hole 140.

[0054] Among them, Figure 1-Figure 7As shown, the pole frame 100 and the sealing gasket 200 are respectively provided with a first flow channel hole 140 and a second flow channel hole 230 extending along a first direction, and the positions of the first flow channel hole 140 and the second flow channel hole 230 correspond. When the pole frame 100 and the sealing gasket 200 are stacked, the first flow channel hole 140 and the second flow channel hole 230 are connected to form an alkaline solution flow channel 300.

[0055] like Figure 1-Figure 7 As shown, since the sealing gasket 200 is arranged between two adjacent pole frames 100, and at least part of the aperture of the second flow channel hole 230 is smaller than the aperture of the first flow channel hole 140, the inner circumferential wall of the second flow channel hole 230 protrudes inward relative to the inner circumferential wall of the first flow channel hole 140, that is, a step surface is formed between the second flow channel hole 230 and the first flow channel hole 140, or the second flow channel hole 230 itself forms a step surface, and the alkali solution flow channel 300 is bent at the step.

[0056] During the actual implementation process, when the current flows in the alkali liquid flow channel 300, the current flowing along the periphery of the alkali liquid flow channel 300 passes through the first flow channel hole 140 located at the first end of the sealing gasket 200 along the first direction, and then flows inward along the step surface between the first flow channel hole 140 and the second flow channel hole 230 located at the first end of the sealing gasket 200, so that the current can flow through the portion of the second flow channel hole 230 whose aperture is smaller than the first flow channel hole 140. After passing through the second flow channel hole 230, the current flows outward along the step surface between the first flow channel hole 140 and the second flow channel hole 230 located at the second end of the sealing gasket 200, and so on, the current flows through the alkali liquid flow channel 300.

[0057] By setting the first flow channel hole 140 and the second flow channel hole 230, the bending part of the alkali solution flow channel 300 can be realized by utilizing the different aperture sizes of the first flow channel hole 140 and the second flow channel hole 230. The structure is simple and the production cost can be reduced to a certain extent.

[0058] In some embodiments, Figure 5 and Figure 6 As shown, the aperture D2 of the second flow channel hole 230 is smaller than the aperture D1 of the first flow channel hole 140 .

[0059] Among them, Figure 5 and Figure 6 As shown, the aperture D2 of each position of the second flow channel hole 230 is smaller than the aperture D1 of the first flow channel hole 140 , and a step surface is formed between the second flow channel hole 230 and the first flow channel hole 140 .

[0060] By setting the aperture D2 at each position of the second flow channel hole 230 to be smaller than the aperture D1 of the first flow channel hole 140, the portion of the second flow channel hole 230 protruding inward relative to the first flow channel hole 140 can be increased, further extending the path length of the current flowing in the alkali solution flow channel 300, thereby further reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0061] In some embodiments, the inner wall surface of the second flow channel hole 230 is an arc-shaped surface, and the center of curvature of the arc-shaped surface is located at the outer circumference of the second flow channel hole 230 .

[0062] The inner wall of the second flow channel hole 230 is convex inwardly and has an arc-shaped structure.

[0063] In actual implementation, after the alkali solution passes through the first flow channel hole 140 , it can continue to flow in the alkali solution flow channel 300 along the arc path of the second flow channel hole 230 .

[0064] By setting the inner wall surface of the second flow channel hole 230 as an arc surface, and the center of curvature of the arc surface is located at the outer periphery of the second flow channel hole 230, the bypass current can be reduced while reducing the angle of the alkali solution flow channel 300, thereby improving the smoothness of the flow of alkali solution in the alkali solution flow channel 300, reducing the probability of alkali solution accumulation between the first flow channel hole 140 and the second flow channel hole 230, reducing the obstruction of the second flow channel hole 230 to the alkali solution during the flow process, and improving the utilization rate of the alkali solution.

[0065] In some embodiments, Figure 8-Figure 11 As shown, there are multiple sealing gaskets 200, and the sealing gaskets 200 are provided with third flow channel holes 240 that pass through along the first direction, and the third flow channel holes 240 of two adjacent sealing gaskets 200 are staggered in the circumferential direction, and the pole frame 100 is provided with fourth flow channel holes 150, and the third flow channel holes 240 of the sealing gaskets 200 located at both ends of the pole frame 100 are connected to the corresponding fourth flow channel holes 150.

[0066] The third flow channel hole 240 may be a circular structure, a trapezoidal structure or other shapes, for example Figure 8-Figure 11 As shown, the third flow channel hole 240 is a waist-shaped structure.

[0067] The fourth flow channel hole 150 can be a circular structure, a rectangular structure, a trapezoidal structure or other shapes, for example Figure 8-Figure 11 As shown, the fourth flow channel hole 150 is a waist-shaped structure as a whole.

[0068] like Figure 8-Figure 11As shown, the circumferential length of the fourth flow channel hole 150 is greater than that of the third flow channel hole 240 , and the two third flow channel holes 240 located at both ends of the pole frame 100 can be connected to the two ends of the fourth flow channel hole 150 along the circumferential direction respectively, and can also be connected to other positions of the fourth flow channel hole 150 .

[0069] like Figure 8-Figure 11 As shown, the fourth flow channel hole 150 may entirely penetrate the pole frame 100 along the first direction, or may partially penetrate the pole frame 100 along the first direction. For example, the fourth flow channel hole 150 entirely penetrates the pole frame 100 along the first direction.

[0070] In the actual implementation process, Figure 8 As shown, when the current flows through the alkali solution flow channel 300, it first passes through the third flow channel hole 240 of the sealing gasket 200 located at the first end of the pole frame 100, and then flows into the fourth flow channel hole 150 through the third flow channel hole 240. Since the third flow channel holes 240 of two adjacent sealing gaskets 200 are staggered in the circumferential direction, that is, the third flow channel holes 240 located at both ends of the pole frame 100 are staggered in the circumferential direction, the two third flow channel holes 240 connected to the same fourth flow channel hole 150 are spaced apart in the circumferential direction. At the same time, when the pole frame 100 and the sealing gasket 200 are stacked, the end surface of the pole frame 100 and the sealing gasket 200 are staggered in the circumferential direction. The end faces are fitted, so the portion of the fourth flow channel hole 150 located between the two third flow channel holes 240 cooperates with the end face of the sealing gasket 200 to form a groove body. In this portion, it is difficult for the alkali solution to continue to flow along the first direction, that is, the alkali solution flows circumferentially from the first third flow channel hole 240 to the second third flow channel hole 240 under the guidance of the groove body, and after flowing through the second third flow channel hole 240, it continues to flow along the first direction to the fourth flow channel hole 150 of the next pole frame 100, and then flows circumferentially in the fourth flow channel hole 150 of the next pole frame 100 to a position connected with the third third flow channel hole 240, and so on, flows through the alkali solution flow channel 300.

[0071] By setting the third flow channel hole 240 and the fourth flow channel hole 150, all currents in the alkali solution flow channel 300 can flow along the bent alkali solution flow channel 300, thereby further reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0072] In some embodiments, a groove 130 is provided on the end surface of the electrode frame 100 , and two ends of the groove 130 are respectively connected to the fourth flow channel hole 150 and the electrolysis chamber of the electrode plate.

[0073] Among them, Figure 8-Figure 11 As shown, the groove 130 may be a trapezoidal structure, a waist-shaped structure or other shapes. For example, the groove 130 is a rectangular structure.

[0074] like Figure 8-Figure 11As shown, the alkali solution flow channel 300 is connected to the electrolysis chamber formed by the electrode plate 400 through the groove 130 , so that the alkali solution can flow from the alkali solution flow channel 300 through the groove 130 into the electrolysis chamber.

[0075] The arrangement of the groove 130 can facilitate the alkali solution to flow from the alkali solution flow channel 300 into the electrolysis chamber, thereby providing a guide for the flow of the alkali solution in the alkali solution flow channel 300 .

[0076] In some embodiments, Figure 8-Figure 11 As shown, the groove 130 is located at a position where the fourth flow channel hole 150 is close to the third flow channel hole 240 located upstream along the flow direction of the alkali solution.

[0077] The groove 130 is located at a position of the fourth flow channel hole 150 in the circumferential direction close to the third flow channel hole 240 located upstream along the flow direction of the alkali solution, for example. Figure 8-Figure 11 As shown, the third flow channel hole 240 located upstream along the flow direction of the alkali solution is connected to the right end of the fourth flow channel hole 150 , and the groove 130 can also be connected to the right end of the fourth flow channel hole 150 .

[0078] During the actual implementation process, when the alkali solution flows into the alkali solution flow channel 300, the alkali solution flows from the third flow channel hole 240 of the sealing gasket 200 located upstream into the fourth flow channel hole 150. Since the groove 130 is located at the fourth flow channel hole 150 close to the third flow channel hole 240 located upstream along the alkali solution flow direction, when the alkali solution flows into the fourth flow channel hole 150, part of the alkali solution can continue to flow directly along the groove 130 into the electrolysis chamber, and the rest of the alkali solution flows along the fourth flow channel hole 150 to the third flow channel hole 240 of the sealing gasket 200 located downstream.

[0079] By arranging the groove 130 to be located near the third flow channel hole 240 located upstream along the flow direction of the alkali solution, the speed of the alkali solution entering the electrolysis chamber can be increased, the time for electrolytic hydrogen production can be shortened, and the electrolysis efficiency can be improved.

[0080] In some embodiments, Figure 8-Figure 11 As shown, there are a plurality of alkali solution flow channels 300 , and the plurality of alkali solution flow channels 300 are distributed at intervals along the circumference of the pole frame 100 .

[0081] Among them, Figure 8-Figure 11 As shown, the number of the alkali solution flow channels 300 may be two, three or other numbers, and the plurality of alkali solution flow channels 300 are distributed at intervals along the circumference of the pole frame 100 .

[0082] By providing a plurality of alkali solution flow channels 300 , the efficiency of injecting alkali solution into the electrolytic chamber can be improved, and the uniformity of the alkali solution in the electrolytic chamber can be improved when the alkali solution is injected into the electrolytic chamber.

[0083] An embodiment of the present application also provides a hydrogen production system, which includes any one of the above-mentioned electrolyzers.

[0084] According to the hydrogen production system provided in the embodiment of the present application, by adopting any of the above-mentioned electrolytic cells, the current path length of the current in the alkaline solution flow channel 300 can be increased, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0085] An embodiment of the present application also provides a hydrogen production station, which includes any one of the above-mentioned hydrogen production systems.

[0086] According to the hydrogen production station provided in the embodiment of the present application, by adopting any of the above-mentioned hydrogen production systems, the current path length of the current in the alkali solution flow channel 300 can be increased, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrode plate during the electrolysis process.

[0087] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0088] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0089] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0090] In the description of the present application, “plurality” means two or more.

[0091] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0092] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0094] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electrolytic cell, characterized in that: include: A plurality of electrode plates, wherein the plurality of electrode plates are stacked along a first direction; At least one sealing gasket is installed between the pole frames of two adjacent electrode plates, and the at least one sealing gasket and the plurality of pole frames form an alkali liquid flow channel, the alkali liquid flow channel includes multiple sections, and at least two sections of the alkali liquid flow channel are bent.

2. The electrolytic cell according to claim 1, characterized in that The pole frame is provided with a first flow channel hole extending along the first direction, and the sealing gasket is provided with a second flow channel hole extending along the first direction. The axes of the first flow channel hole and the second flow channel hole are aligned, the first flow channel hole and the second flow channel hole form the alkali liquid flow channel, and at least part of the aperture of the second flow channel hole is smaller than the aperture of the first flow channel hole.

3. The electrolytic cell according to claim 2, characterized in that The aperture of the second flow channel hole is smaller than the aperture of the first flow channel hole.

4. The electrolytic cell according to claim 2, characterized in that The inner wall surface of the second flow channel hole is an arc-shaped surface, and the center of curvature of the arc-shaped surface is located at the outer periphery of the second flow channel hole.

5. The electrolytic cell according to claim 1, characterized in that There are multiple sealing gaskets, each of which is provided with a third flow channel hole extending along the first direction, and the third flow channel holes of two adjacent sealing gaskets are staggered in the circumferential direction, and the pole frame is provided with a fourth flow channel hole, and the third flow channel holes of the sealing gaskets located at both ends of the pole frame are connected to the corresponding fourth flow channel holes.

6. The electrolytic cell according to claim 5, characterized in that The end surface of the pole frame is provided with a groove, and the two ends of the groove are respectively connected with the fourth flow channel hole and the electrolysis chamber of the electrode plate.

7. The electrolytic cell according to claim 6, characterized in that The groove is located at a position where the fourth flow channel hole is close to the third flow channel hole located upstream along the flow direction of the alkali solution.

8. The electrolytic cell according to any one of claims 1 to 7, characterized in that: There are a plurality of alkali solution flow channels, and the plurality of alkali solution flow channels are distributed at intervals along the circumference of the pole frame.

9. A hydrogen production system, characterized in that: include: The electrolytic cell according to any one of claims 1 to 8.

10. A hydrogen production station, characterized in that: include: Renewable energy generation systems; According to the hydrogen production system as claimed in claim 9, the output end of the renewable energy power generation system is electrically connected to the input end of the hydrogen production system.

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