Electrolyzer assembly and water electrolysis hydrogen generation system

Abstract

The application discloses an electrolytic cell assembly and a water electrolysis hydrogen production system, and relates to the technical field of electrolysis, wherein the electrolytic cell assembly comprises an electrolytic cell and a flow guide structure, the electrolytic cell comprises a plurality of polar plates arranged along a first direction, the plurality of polar plates are formed with a plurality of flow guide channels and a plurality of flow guide openings, the plurality of flow guide channels are arranged at intervals along the first direction, one flow guide opening is in communication with one flow guide channel in a corresponding manner, the flow guide structure is arranged outside the electrolytic cell, the flow guide structure is formed with an extension channel, the extension channel is in communication with at least two flow guide openings, so that the corresponding flow guide channels are in communication, the plurality of polar plates comprise at least two connecting polar plates, two adjacent connecting polar plates are connected to a positive electrode and a negative electrode of a power supply respectively, and at least two adjacent connecting polar plates have at least two flow guide channels in communication through the extension channel. The technical scheme provided by the application aims to reduce the bypass current of the flow guide channel and the loss thereof, so as to improve the efficiency of the electrolytic cell.

Description

Technical Field

[0001] This application relates to the field of electrolysis technology, and in particular to an electrolyzer assembly and a water electrolysis hydrogen production system. Background Technology

[0002] In an electrolytic cell, the electrolyte is distributed to each electrolysis chamber through a flow channel. As the electrolyte flows through the flow channel, current flows through it, which is equivalent to adding a bypass outside the normal electrolysis area, thus sharing the normal electrolysis current and reducing the efficiency of the electrolytic cell. Utility Model Content

[0003] The main objective of this application is to propose an electrolyzer assembly and a water electrolysis hydrogen production system, which aims to reduce the bypass current and its losses in the flow channel in order to improve the efficiency of the electrolyzer.

[0004] To achieve the above objectives, the electrolytic cell assembly proposed in this application includes:

[0005] An electrolytic cell includes multiple electrode plates arranged along a first direction, the multiple electrode plates forming multiple flow channels and multiple flow ports, the multiple flow channels being arranged at intervals along the first direction, and a flow port correspondingly communicating with a flow channel;

[0006] A flow guiding structure is provided outside the electrolytic cell, and the flow guiding structure forms an extended channel. The extended channel is connected to at least two of the flow guiding ports so that the corresponding flow guiding channels are connected.

[0007] The plurality of electrode plates include at least two connecting electrode plates, two adjacent connecting electrode plates are respectively connected to the positive and negative terminals of the power supply, and at least two adjacent connecting electrode plates have at least two flow channels connected by the extension channel.

[0008] In one embodiment, the flow guiding structure further forms a main flow channel that is connected to the extended channel.

[0009] In one embodiment, the flow guiding structure includes a main conveying pipe and multiple branch conveying pipes connected to the main conveying pipe, the extension channel is formed in the branch conveying pipes, and the main flow channel is formed in the main conveying pipe.

[0010] In one embodiment, the extension directions of each of the delivery branches are parallel.

[0011] In one embodiment, the diameter of the delivery branch pipe is smaller than the diameter of the delivery main pipe.

[0012] In one embodiment, the flow channel is an electrolyte inlet channel, an anodic electrolysis product outlet channel, or a cathode electrolysis product outlet channel.

[0013] In one embodiment, the number of connecting plates is two, and the two connecting plates are respectively located on opposite sides in the first direction among the plurality of plates. The number of flow guiding channels and flow guiding ports is correspondingly set to two, and the two flow guiding ports are respectively arranged on the adjacent sides of the two flow guiding channels.

[0014] In one embodiment, when all the flow channels are electrolyte inlet channels, each flow channel includes a first flow section and a second flow section. The flow port, the first flow section and the second flow section of the same flow channel are arranged sequentially from upstream to downstream. The two first flow sections extend away from the corresponding flow ports, and the two second flow sections extend towards each other. An electrolysis chamber is formed between every two adjacent electrode plates, and the second flow section is connected to the electrolysis chamber.

[0015] In one embodiment, the plurality of electrode plates include a first electrode plate, both of the two flow guide ports are disposed on the first electrode plate, and the two flow guide channels are respectively located on opposite sides of the first electrode plate in the first direction.

[0016] In one embodiment, the first electrode plate is located in the middle among the plurality of electrode plates, and the width of the first electrode plate in the first direction is greater than the width of the other electrode plates in the first direction.

[0017] In one embodiment, the plurality of electrode plates include two adjacent second electrode plates, an electrolytic chamber is formed between each pair of adjacent electrode plates, two flow guides are respectively disposed on the two second electrode plates, two flow guides are respectively connected to the electrolytic chambers on opposite sides of the two second electrode plates, and at least one flow guide is connected to the electrolytic chamber between the two second electrode plates.

[0018] In one embodiment, the number of connecting plates is three or more, wherein two of the connecting plates are located on opposite sides of each other in the first direction among the plurality of plates.

[0019] This application also proposes a water electrolysis hydrogen production system, including the aforementioned electrolyzer assembly.

[0020] In the technical solution of this application, the two adjacent current guiding channels are separated and insulated from each other at the position of the electrode plate. When the two current guiding channels are connected by an extension channel, on the adjacent side of the two current guiding channels, the current will not be directly transmitted from one current guiding channel to the other through the electrode plate, but will be bypassed through the extension channel. This extends the path of the current, increases the bypass resistance, and thus reduces the bypass current, thereby reducing the loss of current efficiency caused by the electrolytic cell during the electrolysis process, thereby improving the efficiency of the electrolytic cell. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the electrolytic cell assembly provided in this application;

[0023] Figure 2 This is a schematic diagram of the structure of the second embodiment of the electrolytic cell assembly provided in this application;

[0024] Figure 3 This is a schematic diagram of the structure of the third embodiment of the electrolytic cell assembly provided in this application;

[0025] Figure 4 This is a schematic diagram of the structure of the fourth embodiment of the electrolytic cell assembly provided in this application;

[0026] Figure 5 This is a schematic diagram of the structure of the fifth embodiment of the electrolytic cell assembly provided in this application;

[0027] Figure 6 This is a schematic diagram of the structure of the sixth embodiment of the electrolytic cell assembly provided in this application;

[0028] Figure 7 This is a schematic diagram of the structure of the seventh embodiment of the electrolytic cell assembly provided in this application;

[0029] Figure 8 This is a schematic diagram of the structure of the eighth embodiment of the electrolytic cell assembly provided in this application.

[0030] Explanation of icon numbers:

[0031] 10. Electrolytic cell; 20. Flow guiding structure;

[0032] 100. Electrode plate; 101. Plate body; 102. Electrode frame;

[0033] 110. Flow guiding channel; 111. First flow guiding section; 112. Second flow guiding section; 113. Connecting channel;

[0034] 120. Flow guide port; 130. Flow guide channel; 140. Electrolysis chamber;

[0035] 150. First electrode plate; 160. Second electrode plate; 170. Connecting electrode plate;

[0036] 210. Main conveying pipe; 211. Main flow channel; 220. Branch conveying pipe; 221. Extension channel.

[0037] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0041] This application provides an electrolytic cell assembly.

[0042] Please see Figure 1 In one embodiment of this application, the electrolytic cell assembly includes an electrolytic cell 10 and a flow guiding structure 20. The electrolytic cell 10 includes two end plates and a plurality of electrode plates 100 distributed between the two end plates. The two end plates are connected by a plurality of tie rods. The plurality of electrode plates 100 are arranged along a first direction. The plurality of electrode plates 100 form a plurality of flow guiding channels 110 and a plurality of flow guiding ports 120. The plurality of flow guiding channels 110 are arranged at intervals along the first direction. A flow guiding port 120 is correspondingly connected to a flow guiding channel 110. The flow guiding structure 20 is disposed outside the electrolytic cell 10. The flow guiding structure 20 forms an extension channel 221. The extension channel 221 is connected to at least two flow guiding ports 120 so that the corresponding flow guiding channels 110 are connected.

[0043] The plurality of electrode plates 100 include at least two connecting electrode plates 170, two adjacent connecting electrode plates 170 being connected to the positive and negative terminals of the power supply, respectively, and at least two adjacent connecting electrode plates 170 having at least two guiding channels 110 connected by an extension channel 221.

[0044] The first direction is the direction that is perpendicular or approximately perpendicular to the electrode plate 100.

[0045] Please see Figure 1 and Figure 8 Among two adjacent connecting plates 170, there is a first connecting plate 171 connected to the positive terminal of the power supply and a second connecting plate 172 connected to the negative terminal of the power supply. A plurality of other plates 100 are also sandwiched between the first connecting plate 171 and the second connecting plate 172. The direction of the current is from the first connecting plate 171 to the second connecting plate 172.

[0046] In this application, at least two adjacent connecting plates 170 have at least two flow channels 110 connected by an extension channel 221, meaning that at least one set of first connecting plates 171 and second connecting plates 172 has two flow channels 110 connected by an extension channel 221.

[0047] It should be noted that when the two flow channels 110 pass through the extension channel 221, the adjacent sides of the two flow channels 110 should be insulated from each other to avoid the wall structure between the two flow channels 110 from electrically connecting the two flow channels 110.

[0048] Therefore, in the technical solution of this application, the two adjacent current guiding channels 110 are separated and insulated from each other at the position of the electrode plate 100. When the two current guiding channels 110 are connected through the extension channel 221, on the adjacent side of the two current guiding channels 110, the current will not be directly transmitted from one current guiding channel 110 to the other current guiding channel 110 through the electrode plate 100, but will be detoured through the extension channel 221, thereby extending the path of the current.

[0049] Please refer to the following resistance calculation formula:

[0050] R = ρL / A;

[0051] Where R is the bypass resistance corresponding to the current channel 110, ρ is the resistivity of the electrolyte, L is the path length of the bypass current, and A is the cross-sectional area of ​​the bypass current passing through the electrolyte.

[0052] According to the resistance calculation formula, as the path length L increases, the bypass resistance R will also increase, thereby reducing the bypass current and reducing the loss of current efficiency caused by the electrolyzer during the electrolysis process, thus improving the efficiency of the electrolyzer.

[0053] Specifically, please refer to Figures 1 to 7 The number of connecting plates 170 can be set to two. The two connecting plates 170 are located on opposite sides in the first direction among the multiple plates 100, that is, each end of the electrolytic cell 10 is provided with a connecting plate 170.

[0054] Of course, please see Figure 8 Alternatively, the number of connecting plates 170 can be set to three or more (including three), with two connecting plates 170 located on opposite sides of each other in the first direction among the multiple plates 100. That is, each end of the electrolytic cell 10 has a connecting plate 170, and other connecting plates 170 are provided between these two connecting plates 170. In this way, an electrolytic cell including multiple electrolytic chambers 140 will be formed between every two adjacent connecting plates 170. If one electrolytic chamber 140 has a problem, it will only affect the electrolytic cell to which it belongs, and the other electrolytic cells can continue to operate. That is, the connecting plate 170 in the middle position will serve as a common electrode, and an electrolytic cell will be formed on each side of it. Furthermore, a main delivery pipe 210 and a branch delivery pipe 220 can be connected to one of the connecting plates 170 in the middle position to centrally supply electrolyte to the entire electrolytic cell. The electrolyte enters the two branch delivery pipes 220 through the main delivery pipe 210 and then forms two branches to flow to both sides of the connecting plate 170, which helps to improve the uniformity of electrolyte flow in the electrolytic cell and the electrolyte delivery efficiency.

[0055] It is understood that the electrode 100 includes a plate body 101 and an electrode frame 102 surrounding the plate body 101. An electrolytic chamber 140 is formed between the plate bodies 101 of each two adjacent electrode plates 100. Each electrode frame 102 of the electrode plate 100 has a guide hole that extends through in a first direction. The guide holes of multiple electrode plates 100 are arranged opposite to each other in the first direction. A guide channel 110 includes at least one guide hole of the electrode plate 100. The electrode frame 102 is also provided with a guide groove. 130, the flow guide groove 130 is located on the side of the flow guide hole near the plate 101. Each flow guide hole is connected to an electrolysis chamber 140 through a flow guide groove 130. The flow guide port 120 is also provided on the pole frame 102. The flow guide port 120 and the flow guide groove 130 are located on opposite sides of the flow guide channel 110. The flow guide port 120 is connected to one of the flow guide holes in the flow guide channel 110. The extension channel 221 is connected to the flow guide port 120, so that the corresponding flow guide channel 110 can be connected.

[0056] In this embodiment, each flow channel 110 is configured as an electrolyte inlet channel to reduce the bypass heat generation of the electrolyte inlet channel. It can be understood that after the electrolyte enters the flow channel 110, it can enter each electrolysis chamber 140 through each flow groove 130 and undergo an electrolysis reaction in the electrolysis chamber 140.

[0057] Specifically, please refer to Figure 2 and Figure 3 The inlet of the electrolyte introduction channel can be located on one of the electrode plates 100. In this case, every two adjacent flow channels 110 are connected by an extension channel 221 on the adjacent side. The electrolyte enters the flow channel 110 located on the side from the inlet on one of the ends. During the flow of the electrolyte in the flow channel 110, after passing through each electrode plate 100, a portion of the electrolyte will enter the electrolysis chamber 140 through the flow channel 130. The remaining electrolyte will continue to flow along the flow channel 110. When it flows to the end of the flow channel 110, it will enter the next flow channel 110 through the extension channel 221 until it has traversed all the electrode plates 100.

[0058] Of course, it can also be, such as Figure 1 , Figures 4 to 7 As shown, by using the flow port 120 of each flow channel 110 as an inlet, that is, supplying electrolyte to each flow channel 110 separately, the flow path of the electrolyte can be shortened, avoiding insufficient downstream electrolyte flow and uneven distribution of electrolyte among the electrolysis chambers 140. In this case, the extended channel 221 is connected to each flow port 120, thereby enabling concentrated and efficient supply of electrolyte to each flow channel 110. Specifically, please refer to... Figure 6 When there are more than three flow channels 110, the bypass current of the flow channels 110 will flow from one of the flow channels 110 located on the side to another flow channel 110 located on the side via the extension channel 221. That is, the flow channels 110 in the middle region will be short-circuited. However, in this case, the path length of the bypass current will also increase significantly, which means that the energy loss of the electrolytic cell 10 can still be reduced and the electrolysis efficiency can be improved.

[0059] In other embodiments, each flow channel 110 can also be configured as an anodic electrolysis product outlet channel or a cathode electrolysis product outlet channel to reduce the bypass heat generation of the electrolysis product outlet channel. Specifically, the electrolysis products generated in the anodic electrolysis chamber 140 will enter the anodic electrolysis product outlet channel through the corresponding flow channel 130 and exit the electrolysis cell 10 through it. The electrolysis products generated in the cathode electrolysis chamber 140 will enter the cathode electrolysis product outlet channel through the corresponding flow channel 130 and exit the electrolysis cell 10 through it. Other specific settings can refer to the electrolyte inlet channel described above. The difference is that the electrolyte inlet channel needs to introduce electrolyte, while these two electrolysis product outlet channels need to export the corresponding electrolysis products. The flow paths of the flow channels 110 are opposite. Subsequent embodiments will be described using the electrolyte inlet channel as an example. The anodic electrolysis product outlet channel or the cathode electrolysis product outlet channel can be referred to accordingly with the opposite flow paths.

[0060] Alternatively, each of the electrolyte inlet channel, the anode electrolysis product outlet channel, and the cathode electrolysis product outlet channel in the electrolytic cell assembly of this application may be configured in this manner to further reduce the bypass heat generation of the electrolytic cell 10.

[0061] In addition, such as Figures 1 to 6 As shown, the flow guiding structure 20 can be configured as a pipe, and the internal space of the pipe serves as the extension channel 221. Of course, the flow guiding structure 20 can also be configured as follows: Figure 7 As shown, it is a block body configured to form an extended channel 221.

[0062] Further, in this embodiment, please refer to Figure 1 , Figures 4 to 7 The flow guiding structure 20 also forms a main flow channel 211, which is connected to the extension channel 221. It can be understood that, for the electrolyte inlet channel, one end of the main flow channel 211 is connected to the electrolyte supply source, and the other end can be connected to any position in the extension channel 221. Thus, after the electrolyte enters the main flow channel 211, it can be distributed to each flow guiding channel 110 through the extension channel 221, efficiently supplying the electrolyte required for the electrolysis reaction to each electrolysis chamber 140. For the electrolysis product outlet channel, the end of the main flow channel 211 furthest from the extension channel 221 is connected to the relevant electrolysis product processing equipment. Thus, after the electrolysis products from each flow guiding channel 110 converge in the main flow channel 211, they can enter the corresponding processing equipment for processing according to the relevant procedures.

[0063] Further, in this embodiment, please refer to Figure 1 , Figures 4 to 6The flow guiding structure 20 includes a main conveying pipe 210 and multiple branch conveying pipes 220 connected to the main conveying pipe 210. An extension channel 221 is formed within the branch conveying pipes 220, and a main flow channel 211 is formed within the main conveying pipe 210. That is, the flow guiding structure 20 is configured as a pipe fitting, which makes assembly easier and enables reliable and efficient fluid transport.

[0064] Furthermore, according to the resistance calculation formula: R = ρL / A, the bypass resistance R is directly proportional to the path length L of the bypass current and inversely proportional to the cross-sectional area A of the electrolyte through which the bypass current passes. L is directly proportional to the length of the extension channel 221, and A is directly proportional to the current-carrying area of ​​the extension channel 221. If it is necessary to increase the bypass resistance, the length of the extension channel 221 can be increased while its current-carrying area can be decreased. However, increasing the length of the extension channel 221 will increase the electrolyte's friction loss, while decreasing its current-carrying area will reduce the electrolyte's flow rate; both will affect the electrolyte's transport efficiency. Therefore, the length and current-carrying area of ​​the extension channel 221 must be designed to balance reducing the bypass resistance with improving the electrolyte's transport efficiency.

[0065] In this embodiment, the flow guiding structure 20 is set as a pipe fitting, the length of the extended channel 221 is also the pipe length of the delivery branch pipe 220, and the flow area of ​​the extended channel 221 is also the cross-section of the delivery branch pipe 220. The pipe fitting has a variety of specifications and a wide range of options. It is convenient to select a suitable pipe fitting as the delivery branch pipe 220 from different specifications to ensure the electrolyte delivery efficiency when the bypass resistance is increased.

[0066] Furthermore, it should be noted that the various delivery branch pipes 220 are mutually insulated to avoid short circuits. This can be achieved by: sufficient distance between each pair of delivery branch pipes 220; insulation between adjacent delivery branch pipes 220; or an insulating sleeve over each delivery branch pipe 220. This ensures that the current circulates more thoroughly in the extended channel 221, effectively extending the current flow path and reliably reducing bypass heat generation, thus minimizing energy loss in the electrolytic cell 10 and improving its electrolysis efficiency.

[0067] In one embodiment, the extension directions of each conveying branch pipe 220 are parallel. It can be understood that "parallel" means parallel or approximately parallel. The parallel extension of each conveying branch pipe 220 facilitates the spatial arrangement of the pipes. Furthermore, the distribution of each conveying branch pipe 220 outside the electrolytic cell 10 is more intuitive, making later maintenance and replacement easier. Of course, in other embodiments, different conveying branch pipes 220 can have different extension directions according to spatial layout requirements.

[0068] In one embodiment, the diameter of the delivery branch pipe 220 is smaller than the diameter of the delivery main pipe 210. The electrolyte is split at the connection between the delivery main pipe 210 and the delivery branch pipe 220. At this point, the smaller diameter of the delivery branch pipe 220 still meets the electrolyte delivery requirements, while also increasing the bypass resistance, thereby further reducing energy loss in the electrolytic cell 10 and improving electrolysis efficiency. Of course, in other embodiments, the diameter of the delivery branch pipe 220 can be equal to or approximately equal to the diameter of the delivery main pipe 210.

[0069] In one implementation, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 The number of flow guiding channels 110 and flow guiding ports 120 is set to two, with the two flow guiding ports 120 respectively located on adjacent sides of the two flow guiding channels 110 in the first direction. This embodiment achieves the effect of guiding bypass current around the current by setting two sets of flow guiding channels 110 and flow guiding ports 120, utilizing the fewest possible structural units. This simplifies the structure of the electrolytic cell 10 and the flow guiding structure 20. Furthermore, the relatively concentrated arrangement of the two flow guiding ports 120 facilitates the connection of the flow guiding structure 20. In other embodiments, such as... Figure 6 As shown, the guide port 120 can be respectively set to the middle section of its respective guide channel 110, or the number of guide channels 110, guide ports 120 and extension channels 221 can be set to other numbers, for example... Figure 3 and Figure 7 The number of three or more shown.

[0070] In one implementation, please refer to Figure 1 When all the flow channels 110 are electrolyte inlet channels, each flow channel 110 includes a first flow section 111 and a second flow section 112. The flow port 120, the first flow section 111 and the second flow section 112 of the same flow channel 110 are arranged sequentially from upstream to downstream. The two first flow sections 111 extend from the corresponding flow ports 120 in opposite directions, and the two second flow sections 112 extend towards each other. The second flow section 112 is connected to the electrolysis chamber 140.

[0071] Specifically, the first guide section 111 and the second guide section 112 of the same guide channel 110 extend side by side along the first direction. The first guide section 111 and the second guide section 112 each have a first end and a second end that are arranged opposite to each other in the first direction. The first ends of the first guide section 111 and the second guide section 112 are connected on the electrode plate 100 located on the side by a connecting channel 113. The second ends of the first guide section 111 and the second guide section 112 are separated from each other. The electrolysis chamber 140 is located on the side of the second guide section 112 away from the first guide section 111. The guide port 120 is located on the side of the first guide section 111 away from the second guide section 112 and is arranged corresponding to the second end of the first guide section 111. The electrolyte in the extended channel 221 will flow from the guide port 120 into the second end of the first guide section 111, and then flow along the first guide section 111 toward its first end. The electrolyte flowing to the first end of the first guide section 111 will enter the first end of the second guide section 112 through the connecting channel 113, and then flow along the second guide section 112 toward its second end. In this process, each time the electrolyte flows through an electrode plate 100, a portion of the electrolyte will enter the corresponding electrolytic chamber 140 through the electrolytic cell 10 on the electrode plate 100, until the electrolyte flows to the second end of the second guide section 112, that is, it can traverse the electrode plate 100 corresponding to the guide channel 110.

[0072] In this embodiment, after the electrolyte enters the flow channel 110, it first flows in the first flow section 111. After entering the second flow section 112, the electrolyte flows back in the opposite direction along the second flow section 112, and only after entering the second flow section 112 does the electrolyte flow to the corresponding electrolysis chamber 140. In this way, the first flow section 111 can buffer the electrolyte, appropriately reducing the electrolyte flow rate and preventing it from being too fast. It is understood that if the electrolyte passes through the flow channel 130 at a relatively high speed, the flow rate of electrolyte into the electrolysis chamber 140 through the flow channel 130 will be relatively small, which may not be enough to supply sufficient electrolyte to the electrolysis chamber 140. The electrolyte flow rate entering the second flow section 112 is quite gentle, which is conducive to supplying sufficient and uniform electrolyte to each electrolysis chamber 140, and helps to ensure the efficient conduct of the electrolysis reaction in each electrolysis chamber 140.

[0073] Of course, in other embodiments, it can also be, such as Figure 2 , Figure 4 and Figure 5 As shown, the flow channel 110 is only provided with the first flow section 111 mentioned above. At the same time, a flow regulating valve is provided between the flow port 120 and the extension channel 221 to adjust the flow rate of the electrolyte to the correct position before the electrolyte enters the flow channel 110.

[0074] In one implementation, please refer to Figure 1 , Figure 2 , Figure 4and Figure 7 The multiple electrode plates 100 include a first electrode plate 150, two flow guide ports 120 are both disposed on the first electrode plate 150, and two flow guide channels 110 are respectively located on opposite sides of the first electrode plate 150 in a first direction. Thus, except for the two electrode plates 100 and the first electrode plate 150 respectively disposed on opposite sides in the first direction, the other electrode plates 100 can be configured with the same structure, which facilitates the assembly of the electrolytic cell 10, and the fact that the two flow guide ports 120 are both located on the first electrode plate 150 facilitates the connection of the flow guide structure 20.

[0075] In one embodiment, the first electrode plate 150 is positioned in the middle among the plurality of electrode plates 100, and the width of the first electrode plate 150 in the first direction is greater than the width of the other electrode plates 100 in the first direction. Positioning the first electrode plate 150 in the middle among the plurality of electrode plates 100 means that the number of electrode plates 100 distributed on opposite sides of the first electrode plate 150 in the first direction is equal or approximately equal. This ensures high structural consistency of the flow channels 110 on opposite sides of the first electrode plate 150, which is beneficial for uniform electrolyte distribution. The wider width of the first electrode plate 150 facilitates the fabrication of the two flow ports 120, and also ensures the structural strength of the formed first electrode plate 150.

[0076] In one implementation, please refer to Figure 5 The plurality of electrode plates 100 include two adjacent second electrode plates 160, with an electrolytic chamber 140 formed between each pair of adjacent electrode plates 100. Two flow inlets 120 are respectively disposed on the two second electrode plates 160, and two flow channels 110 are respectively connected to the electrolytic chambers 140 on opposite sides of the two second electrode plates 160. At least one flow channel 110 is connected to the electrolytic chamber 140 between the two second electrode plates 160. Alternatively, only one flow channel 110 may be connected to the electrolytic chamber 140 between the two second electrode plates 160, or both flow channels 110 may be connected to the electrolytic chamber 140 between the two second electrode plates 160. In the latter case, the two second electrode plates 160 can be configured with the same structure to reduce the number of different structural types of the electrode plates 100 and facilitate the production and processing of the electrode plates 100.

[0077] The flow channel 110 can be configured as a single section, or it can be configured as a first flow channel 111 and a second flow channel 112, referring to the above scheme.

[0078] In addition, these two adjacent second electrode plates 160 are also located in the middle among the multiple electrode plates 100, so that the structure of the flow channel 110 on the opposite side of the two second electrode plates 160 is highly consistent, which is conducive to the uniform distribution of electrolyte.

[0079] Of course, in other embodiments, the two guide ports 120 may be respectively disposed on the two electrode plates 100, and at least one electrode plate 100 may be sandwiched between the two electrode plates 100.

[0080] This application also proposes a water electrolysis hydrogen production system, which includes the aforementioned electrolyzer assembly. The specific structure of the electrolyzer assembly is as described in the above embodiments. Since this water electrolysis hydrogen production system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0081] The above are merely exemplary embodiments of this application and do not limit the scope of protection of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. An electrolytic cell assembly, characterized in that, include: An electrolytic cell (10) includes a plurality of electrode plates (100) arranged along a first direction. The plurality of electrode plates (100) form a plurality of flow channels (110) and a plurality of flow ports (120). The plurality of flow channels (110) are arranged at intervals along the first direction. A flow port (120) is correspondingly connected to a flow channel (110). A flow guiding structure (20) is provided outside the electrolytic cell (10). The flow guiding structure (20) forms an extension channel (221). The extension channel (221) is connected to at least two flow guiding ports (120) so that the corresponding flow guiding channels (110) are connected. The plurality of electrode plates (100) include at least two connecting electrode plates (170), two adjacent connecting electrode plates (170) are respectively connected to the positive and negative terminals of the power supply, and at least two adjacent connecting electrode plates (170) have at least two flow channels (110) connected by the extension channel (221).

2. The electrolytic cell assembly as described in claim 1, characterized in that, The flow guiding structure (20) also forms a main flow channel (211), which is connected to the extended channel (221).

3. The electrolytic cell assembly as described in claim 2, characterized in that, The flow guiding structure (20) includes a main conveying pipe (210) and multiple branch conveying pipes (220) connected to the main conveying pipe (210). The extension channel (221) is formed in the branch conveying pipes (220), and the main flow channel (211) is formed in the main conveying pipe (210).

4. The electrolytic cell assembly as described in claim 3, characterized in that, The extension directions of each of the aforementioned delivery branch pipes (220) are parallel; And / or, the diameter of the delivery branch pipe (220) is smaller than the diameter of the delivery main pipe (210).

5. The electrolytic cell assembly as described in claim 1, characterized in that, The flow channel (110) is an electrolyte inlet channel, an anode electrolysis product outlet channel, or a cathode electrolysis product outlet channel.

6. The electrolytic cell assembly according to any one of claims 1 to 5, characterized in that, The number of connecting plates (170) is two, and the two connecting plates (170) are respectively located on opposite sides in the first direction among the plurality of plates (100). The number of flow channels (110) and flow ports (120) is correspondingly set to two, and the two flow ports (120) are respectively set on the adjacent sides of the two flow channels (110).

7. The electrolytic cell assembly as described in claim 6, characterized in that, When all the flow channels (110) are electrolyte inlet channels, each flow channel (110) includes a first flow section (111) and a second flow section (112). The flow port (120), the first flow section (111) and the second flow section (112) of the same flow channel (110) are arranged sequentially from upstream to downstream. The two first flow sections (111) extend away from the corresponding flow port (120), and the two second flow sections (112) extend towards each other. An electrolytic chamber (140) is formed between every two adjacent electrode plates (100), and the second flow section (112) is connected to the electrolytic chamber (140).

8. The electrolytic cell assembly as described in claim 6, characterized in that, The plurality of electrode plates (100) include a first electrode plate (150), two flow guides (120) are disposed on the first electrode plate (150), and two flow guide channels (110) are respectively located on opposite sides of the first electrode plate (150) in the first direction.

9. The electrolytic cell assembly as described in claim 8, characterized in that, The first electrode plate (150) is located in the middle among the plurality of electrode plates (100), and the width of the first electrode plate (150) in the first direction is greater than the width of the other electrode plates (100) in the first direction.

10. The electrolytic cell assembly as described in claim 6, characterized in that, The plurality of electrode plates (100) include two adjacent second electrode plates (160), an electrolytic chamber (140) is formed between each pair of adjacent electrode plates (100), two flow inlets (120) are respectively disposed on the two second electrode plates (160), two flow channels (110) are respectively connected to the electrolytic chambers (140) on opposite sides of the two second electrode plates (160), and at least one flow channel (110) is connected to the electrolytic chamber (140) between the two second electrode plates (160).

11. The electrolytic cell assembly as described in claim 1 or 5, characterized in that, The number of connecting plates (170) is three or more, wherein two of the connecting plates (170) are located on opposite sides of each other in the first direction among the plurality of plates (100).

12. A water electrolysis hydrogen production system, characterized in that, Includes the electrolytic cell assembly as described in any one of claims 1 to 11.

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