Electrolytic bath pole plate, electrolytic unit and electrolytic bath

Abstract

The utility model discloses an electrolytic bath pole plate, an electrolytic unit and an electrolytic bath, and relates to the technical field of hydrogen production, the electrolytic bath pole plate comprises a main pole plate and a pole frame, the pole frame is provided with a liquid inlet cavity, a gas outlet cavity, a liquid inlet groove and a gas outlet groove, and the liquid inlet groove is communicated with the liquid inlet cavity and the surface of the main pole plate; the air outlet groove is communicated with the surface of the main polar plate and the air outlet cavity; at least one of the liquid inlet groove and the air outlet groove is provided with a curve section. Through the design of the curve section, the fluid flowing path can be prolonged, the bypass resistance is increased, the bypass current is reduced, the leakage amount of the bypass current is reduced, and the internal electrolytic current is increased, so that the current efficiency is improved, and the internal electrolytic current can more effectively utilize electric energy to perform electrolytic reaction in the electrolytic process; the problem that the quality of hydrogen production products is affected by current leakage is effectively solved, and the hydrogen production effect is optimized.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology, and in particular to an electrolyzer electrode plate, an electrolysis unit, and an electrolyzer. Background Technology

[0002] In the electrolysis cell for hydrogen production by water electrolysis, the electrode plate is the main site where electrolysis occurs, and its flow channel design is related to the performance of the product. Reasonable planning of the electrode plate flow channel design is crucial for hydrogen production.

[0003] However, the electrode plates in the relevant design have a current leakage problem. A large amount of current flows away from the bypass branch pipe and does not participate in the main electrolysis reaction, which affects the quality of the hydrogen produced. Utility Model Content

[0004] The main purpose of this application is to provide an electrolyzer electrode plate, an electrolysis unit, and an electrolyzer, which aims to solve the problem of current leakage affecting the quality of hydrogen products.

[0005] On one hand, an electrolytic cell electrode plate is provided, including a main electrode plate and an electrode frame. The electrode frame is provided with a liquid inlet chamber, a gas outlet chamber, a liquid inlet groove, and a gas outlet groove. The liquid inlet groove connects the liquid inlet chamber and the surface of the main electrode plate, and the gas outlet groove connects the surface of the main electrode plate and the gas outlet chamber.

[0006] At least one of the liquid inlet groove and the gas outlet groove has a curved segment.

[0007] In one embodiment, the liquid inlet groove includes a first section and a second section, the first section being connected to the liquid inlet chamber and the second section being connected to the surface of the main electrode plate;

[0008] The first segment and the second segment are connected by the curve segment.

[0009] In one embodiment, the air outlet groove includes a third section and a fourth section, wherein the third section is connected to the surface of the main electrode plate and the fourth section is connected to the air outlet chamber;

[0010] The third segment and the fourth segment are connected by the curve segment.

[0011] In one embodiment, a portion of the liquid inlet groove extends circumferentially along the pole frame;

[0012] And / or, a portion of the vent groove extends circumferentially along the pole frame.

[0013] In one embodiment, the curve segment is arc-shaped.

[0014] In one embodiment, at least one of the liquid inlet groove and the gas outlet groove is multiple.

[0015] In one embodiment, at least one of the liquid inlet chamber and the air outlet chamber is any one or a combination of multiple shapes such as waist-shaped, straight, curved, and circular.

[0016] On the other hand, an electrolysis unit is provided, the electrolysis unit comprising an anode plate, a positive electrode, a diaphragm, a negative electrode, and a cathode plate arranged sequentially along a first direction;

[0017] At least one of the anode plate and the cathode plate adopts the electrolytic cell electrode plate as described in the above embodiment.

[0018] On the other hand, an electrolytic cell is provided, including an electrolytic unit as described in the above embodiment, wherein there are multiple electrolytic units, and the multiple electrolytic units are stacked along a first direction.

[0019] In one embodiment, the electrolytic cell electrode plate has a first surface and a second surface disposed opposite to each other, the first surface being configured as an anode plate of one of two adjacent electrolytic units, and the second surface being configured as a cathode plate of the other of two adjacent electrolytic units.

[0020] The above-described one or more technical solutions in the embodiments of this application have at least one of the following technical effects:

[0021] The electrolytic cell electrode plate includes a main electrode plate and an electrode frame. The electrode frame is provided with a liquid inlet chamber, a gas outlet chamber, a liquid inlet groove, and a gas outlet groove. The liquid inlet groove connects the liquid inlet chamber and the surface of the main electrode plate, and the gas outlet groove connects the surface of the main electrode plate and the gas outlet chamber. The electrolyte enters the electrolysis unit through the liquid inlet chamber, the liquid inlet groove, and the surface of the main electrode plate, and generates gas through the electrolysis reaction. The generated gas is discharged through the gas outlet groove and the gas outlet chamber.

[0022] At least one of the liquid inlet groove and the gas outlet groove has a curved section. The curved section design can extend the fluid flow path and increase the bypass resistance, thereby reducing the bypass current and the leakage of bypass current, and increasing the internal electrolysis current, thus improving the current efficiency. This allows the internal electrolysis current to more effectively utilize electrical energy for the electrolysis reaction during the electrolysis process, effectively solving the problem of current leakage affecting the quality of hydrogen products, thereby improving the purity and quality of hydrogen products and optimizing the hydrogen production effect. Attached Figure Description

[0023] 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.

[0024] Figure 1This is one of the schematic diagrams of the flow path in related technologies;

[0025] Figure 2 This is the second schematic diagram of the flow path in the related technology;

[0026] Figure 3 An equivalent circuit diagram of an embodiment of the electrolytic cell electrode plate provided in this application;

[0027] Figure 4 A partial enlarged view of an embodiment of the flow channel provided in this application;

[0028] Figure 5 A partial enlarged view of another embodiment of the flow channel provided in this application;

[0029] Figure 6 A partial enlarged view of another embodiment of the flow channel provided in this application;

[0030] Figure 7 A schematic diagram of the structure of the first surface of an embodiment of the electrolytic cell electrode plate provided in this application;

[0031] Figure 8 A schematic diagram of the structure of the second surface of an embodiment of the electrolytic cell electrode plate provided in this application;

[0032] Figure 9 This is a schematic diagram of an embodiment of the electrolysis unit provided in this application.

[0033] Explanation of icon numbers:

[0034] 10. Electrolytic cell electrode plates;

[0035] 100. Main electrode plate;

[0036] 200, Pole frame; 211, Liquid inlet chamber; 212, Liquid inlet groove; 2121, First section; 2122, Second section; 221, Gas outlet chamber; 222, Gas outlet groove; 2221, Third section; 2222, Fourth section; 230, Curved section;

[0037] 301, First surface; 302, Second surface;

[0038] 410. Anode plate; 420. Positive electrode; 430. Diaphragm; 440. Negative electrode; 450. Cathode plate;

[0039] 21. Fluid inlet; 22. Flow channel.

[0040] 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

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In the electrolysis cell for hydrogen production by water electrolysis, the electrode plate is the main site where electrolysis occurs. The design of its flow channel structure, such as its shape, size, and quantity, is related to the performance of the product. Reasonable planning of the electrode plate flow channel design is crucial for hydrogen production.

[0045] However, as Figure 1 , Figure 2 The electrode plates in the illustrated design have flow channel structures for liquid inlet and gas outlet, but these flow channel structures have design flaws. Taking the flow channel structure for liquid inlet as an example, it includes a fluid inlet 21 and a flow channel 22 connected to the fluid inlet 21. The flow channel structure has problems such as an excessively large area of ​​flow channel 22 and an excessive number of flow channels 22. These flaws can lead to current leakage, with a large amount of current flowing away from the bypass branch pipe and not participating in the main electrolysis reaction, thus affecting the quality of the hydrogen produced.

[0046] In order to reduce current leakage and solve the problem of current leakage affecting the quality of hydrogen production products, some embodiments of this application propose an electrolyzer electrode plate 10, an electrolysis unit and an electrolyzer.

[0047] like Figure 3 , Figure 4 , Figure 5 As shown, the electrolytic cell electrode plate 10 includes a main electrode plate 100 and an electrode frame 200. The electrode frame 200 is provided with a liquid inlet chamber 211, a gas outlet chamber 221, a liquid inlet groove 212, and a gas outlet groove 222. The liquid inlet groove 212 connects the liquid inlet chamber 211 and the surface of the main electrode plate 100, and the gas outlet groove 222 connects the surface of the main electrode plate 100 and the gas outlet chamber 221.

[0048] The main electrode plate 100 directly participates in the electrochemical reaction. The uniform conductivity of the main electrode plate 100 surface ensures a stable current density distribution. An electrode frame 200 surrounds the main electrode plate 100 and includes flow channels such as an inlet chamber 211, an inlet groove 212, an outlet chamber 221, and an outlet groove 222 to control the flow path of the electrolyte and the discharge of gas. The inlet chamber 211 uniformly distributes the electrolyte, and the inlet groove 212 further transfers the electrolyte to various reaction areas on the surface of the main electrode plate 100. The inlet chamber 211 and inlet groove 212 provide sufficient electrolyte for the electrolysis reaction and achieve uniform electrolyte distribution. The outlet groove 222 collects gases generated during electrolysis (such as oxygen at the anode and hydrogen at the cathode), allowing the gases to converge in the outlet chamber 221 and discharge smoothly, reducing gas retention and, to some extent, controlling the pressure of the electrolysis unit.

[0049] In some embodiments, a filter screen or the like may be provided in the liquid inlet chamber 211 to perform preliminary filtration of the electrolyte; this is not limited here.

[0050] like Figure 1 , Figure 2 As shown, in related technologies, the flow channel structure is mostly set as a straight line, with a large number of flow channels and a large flow channel area, which leads to current leakage. A large amount of current flows away from the bypass branch pipe and does not participate in the main electrolysis reaction. This situation will reduce the actual current efficiency, and the reduced current efficiency will affect the quality of hydrogen production products.

[0051] like Figure 3 , Figure 4 , Figure 5 As shown, in order to increase the internal electrolysis current and improve the current efficiency, in the embodiments of this application, at least one of the liquid inlet groove 212 and the gas outlet groove 222 has a curved segment 230. That is, the liquid inlet groove 212 has a curved segment 230; or, the gas outlet groove 222 has a curved segment 230; or both the liquid inlet groove 212 and the gas outlet groove 222 have curved segments 230.

[0052] The total power supplied to the electrolytic cell is the electrolytic power, which is usually a constant. During electrolysis, the current is divided into two parts: one part is the internal electrolytic current, which is used to generate the desired electrolytic products through chemical reactions at the electrodes; the other part is the bypass current, which does not participate in the electrolytic reaction but flows through certain non-reactive areas of the electrolytic cell. The bypass circuit results in energy waste. In a closed circuit, the total current flowing into a node is equal to the total current flowing out of that node. In the electrolytic cell, the total current supplied by the power source (i.e., the current corresponding to the electrolytic power) is fixed. Therefore, when the bypass current decreases, the internal electrolytic current increases accordingly to maintain current conservation.

[0053] The resistance formula is R = ρL / S, where R represents the bypass resistance; resistivity ρ is the resistivity of the bypass resistor material; length L represents the path length of the current through the conductor, i.e., the path length the current travels through the bypass resistor; and cross-sectional area S represents the area of ​​the conductor's cross-section, i.e., the size of the cross-section occupied by the current when passing through the bypass resistor. (The rest of the text appears to be a continuation of the previous sentence and can be left as is.) Figure 3 The equivalent circuit model shown (R) 旁 R represents the bypass resistor. 内 Using the formula R = ρL / S (representing internal resistance), it can be seen that the inlet groove 212 and the outlet groove 222 can be designed as recesses. With the cross-sectional area of ​​the inlet groove 212 and the outlet groove 222 remaining constant, extending the path length of the inlet groove 212 and the outlet groove 222 can increase the bypass resistance R, reduce bypass leakage current, and decrease the internal resistance. With a constant electrolysis power, reducing the bypass current increases the internal electrolysis current, thereby improving current efficiency.

[0054] like Figure 4 , Figure 5 , Figure 6 As shown, the electrolyte enters the electrolysis unit through the inlet chamber 211, the inlet groove 212, and the surface of the main electrode plate 100. Gas is generated through the electrolysis reaction, and the generated gas is discharged through the outlet groove 222 and the outlet chamber 221. The design of the curved segment 230 can extend the fluid flow path and increase the bypass resistance, thereby reducing the bypass current and leakage, and increasing the internal electrolysis current, thus improving current efficiency. This allows the internal electrolysis current to more effectively utilize electrical energy for the electrolysis reaction, effectively solving the problem of current leakage affecting the quality of hydrogen products, thereby improving the purity and quality of hydrogen products and optimizing the hydrogen production effect.

[0055] When the inlet channel 212 has a curved section 230, the flow path of the electrolyte can be extended, making the electrolyte distribution more uniform and thus improving electrolysis efficiency. When the outlet channel 222 has a curved section 230, the flow path of the gas can be extended, ensuring stable gas flow to a certain extent, optimizing heat dissipation, preventing gas backflow to a certain extent, allowing the gas to be discharged smoothly, and improving gas collection efficiency. When both the inlet channel 212 and the outlet channel 222 have curved sections 230, the advantages of the former two are combined, further extending the flow paths of the electrolyte and gas, improving electrolysis efficiency, and making the flow channel structure of the electrolytic cell electrode plate 10 more compact and efficient; it not only improves the stability of fluid flow but also optimizes heat dissipation and significantly improves gas collection efficiency, thereby promoting the stability and durability of the electrolysis process.

[0056] In addition to providing curved sections 230 for the liquid inlet groove 212 and the gas outlet groove 222, the cross-sectional area of ​​at least one of the liquid inlet groove 212 and the gas outlet groove 222 can be further reduced; alternatively, the main electrode plate 100 can be made of a material with a higher resistivity ρ, such as graphite, metal, or composite materials. Generally, the main electrode plate 100 made of composite materials has a higher resistivity ρ. By reducing the cross-sectional area S of the liquid inlet groove 212 and the gas outlet groove 222 and increasing the resistivity ρ, the bypass resistance can be increased, thereby reducing the bypass current and the leakage of bypass current. This also increases the internal electrolysis current, improves current efficiency, and optimizes the hydrogen production effect. In addition, the number of inlet chambers 211 and outlet chambers 221 can be reduced by setting multiple inlet channels 212 and outlet channels 222; the electrolysis efficiency can also be improved by reducing the cross-sectional area of ​​the flow channels, etc., and under the premise of meeting the quota hydrogen production, combined with the influence of fluid dynamics, the design of the flow channel structure such as inlet chamber 211, inlet channel 212, outlet chamber 221, and outlet channel 222 can be optimized to calculate the flow channel structure area, number of flow channel structures, and inlet and outlet areas and numbers of flow channel structures, so that the electrolytic cell plates applied to the electrolyzer can meet the actual working conditions and ensure that the electrolyte can pass smoothly through the inlet chamber 211 and inlet channel 212, and the gas can pass smoothly through the outlet channel 222 and outlet chamber 221, reducing excessive pressure loss; the specific settings can be based on actual conditions and are not limited here.

[0057] In some embodiments, the liquid inlet groove 212 can be in the form of a reciprocating serpentine, arc, zigzag, or any other shape suitable for practical use; the same applies to the venting groove 222. Taking the liquid inlet groove 212 as an example, the venting groove 222 can be described accordingly without further explanation: one end of the liquid inlet groove 212 is disposed near the periphery of the electrode frame 200 and communicates with the liquid inlet cavity 211, and the other end is disposed near the main electrode plate 100 and communicates with the main electrode plate 100. The liquid inlet groove 212 has a curved segment 230, which can be the entire liquid inlet groove 212 constructed as a curve; or, as... Figure 4 As shown, the inlet groove 212 is constructed as an arc, making the curved segment 230 arc-shaped; alternatively, it can be as follows: Figure 5 As shown, a portion of the inlet channel 212 is constructed as a curve or arc, with the curved segment 230 formed at any position, such as the middle section of the inlet channel 212. Constructing the entire inlet channel 212 as a curve or arc means that the entire flow path from liquid inlet to gas outlet is curved or arc-shaped. This design allows for better control of fluid flow velocity and direction, reduces space waste, and helps increase bypass resistance and reduce bypass current, thereby increasing the proportion of internal electrolysis current and ultimately improving electrolysis efficiency. Constructing a portion of the inlet channel 212 as a curve or arc allows for the curvature of a specific part of the inlet channel 212 according to actual design needs, optimizing the structure of the inlet channel 212. By designing a portion of the inlet channel 212 as a curve or arc, targeted optimization can be performed for different operating conditions, such as fluid mixing and pressure loss, thus meeting the needs of different application scenarios. The design of the curved section 230 not only extends the length of the inlet groove 212, but also optimizes the flow channel structure layout, improves the utilization efficiency of electrolyte and gas, and ultimately achieves the goal of improving electrolysis efficiency.

[0058] like Figure 4 , Figure 5 As shown, in one embodiment, when the liquid inlet groove 212 has a curved segment 230, the liquid inlet groove 212 includes a first segment 2121 and a second segment 2122. The first segment 2121 is connected to the liquid inlet chamber 211, and the second segment 2122 is connected to the surface of the main electrode plate 100. The first segment 2121 and the second segment 2122 are connected by the curved segment 230.

[0059] Compared to a straight flow channel, the design of the curved segment 230 can change the direction of electrolyte flow in the inlet channel 212 and extend the length of the inlet channel 212, thereby increasing the residence time of the electrolyte in the inlet channel 212, making the electrolyte distribution more uniform, and thus improving the electrolysis efficiency.

[0060] In addition to the first segment 2121 and the second segment 2122, the liquid inlet groove 212 may also include one or more other connecting segments to further extend the length of the liquid inlet groove 212. The other one or more connecting segments may be set between the first segment 2121 and the second segment 2122 and connected to the first segment 2121 and the second segment 2122 through the curved segment 230; the specific settings can be made according to actual conditions and are not limited here.

[0061] like Figure 6 As shown, in another embodiment, when the exhaust groove 222 has a curved segment 230, the exhaust groove 222 includes a third segment 2221 and a fourth segment 2222. The third segment 2221 is connected to the surface of the main electrode plate 100, and the fourth segment 2222 is connected to the exhaust chamber 221. The third segment 2221 and the fourth segment 2222 are connected by the curved segment 230.

[0062] Compared to a straight flow channel, the design of the curved section 230 can change the gas flow direction of the outlet groove 222 and extend the length of the outlet groove 222, increasing the actual flow distance of the gas in the outlet groove 222. The curved section 230 also acts as a buffer, allowing the gas to be discharged evenly and smoothly through the outlet groove 222.

[0063] In addition to the third segment 2221 and the fourth segment 2222, the exhaust groove 222 may also include one or more other connecting segments to further extend the length of the exhaust groove 222. The other one or more connecting segments are set between the third segment 2221 and the fourth segment 2222, and can be connected to the third segment 2221 and the fourth segment 2222 through the curved segment 230; the specific settings can be made according to actual conditions and are not limited here.

[0064] like Figure 5 , Figure 6 As shown, in some embodiments, in order to improve the utilization of space and reduce space waste, a portion of the liquid inlet groove 212 may be provided to extend circumferentially along the pole frame 200; a portion of the gas outlet groove 222 may also be provided to extend circumferentially along the pole frame 200; or a portion of the liquid inlet groove 212 may extend circumferentially along the pole frame 200, and a portion of the gas outlet groove 222 may also extend circumferentially along the pole frame 200.

[0065] like Figure 5 As shown, exemplarily, a portion of the liquid inlet groove 212 extends circumferentially along the pole frame 200.

[0066] Taking the inlet groove 212, which includes a first section 2121, a second section 2122, or other connecting sections, as an example, the first section 2121 of the inlet groove 212 connects to the inlet cavity 211, and the second section 2122 connects to the surface of the main electrode plate 100. At least one of the first section 2121 and the second section 2122 extends circumferentially along the main electrode plate 100. That is, the first section 2121 can be configured to extend circumferentially along the main electrode plate 100, and the second section 2122 can also be configured to extend circumferentially along the main electrode plate 100. In this way, the flow path of the electrolyte is significantly extended, the contact time and contact area between the electrolyte and the electrolysis unit are increased, the electrolysis efficiency is improved, and the electrolyte is evenly distributed, enhancing the stability and uniformity of the electrolysis process. Meanwhile, the first segment 2121 and the second segment 2122 are connected by a curved segment 230. The path design of the curved segment 230 can flexibly adapt to the complex layout of the electrolytic cell electrode plate 10 and the inside of the electrolytic cell, reducing space waste and thus reducing the overall size of the electrolytic cell electrode plate and the electrolytic cell. The miniaturization not only reduces manufacturing costs but also improves the compactness and integration of the overall structure, making the electrolytic cell electrode plate 10 more adaptable to various application scenarios and space requirements.

[0067] It should be noted that the curved segment 230 is set on the electrode frame 200 and outside the main electrode plate 100. In addition to at least one of the first segment 2121 and the second segment 2122 extending along the circumference of the main electrode plate 100, at least one of the first segment 2121 and the second segment 2122 can also extend along the radial direction of the main electrode plate 100. This is to improve the compactness and integration of the structure, reduce manufacturing costs, and enable the electrolytic cell electrode plate 10 to adapt to various application scenarios and space requirements.

[0068] The specific implementation of the gas outlet groove 222 extending circumferentially along the pole frame 200 can be referred to the embodiment in which the liquid inlet groove 212 extends circumferentially along the pole frame 200, and will not be described in detail here.

[0069] like Figure 6 , Figure 7 , Figure 8 As shown, in one embodiment, there are multiple of at least one of the liquid inlet chamber 211 and the gas outlet chamber 221. The liquid inlet chamber 211 and the gas outlet chamber 221 mainly serve a collecting function; the liquid inlet chamber 211 is used to collect electrolyte, and the gas outlet chamber 221 is used to collect gas.

[0070] For example, the number of inlet chambers 211 can be one or more. The inlet chamber 211 serves as the initial channel for the electrolyte to enter the electrolytic cell, collecting the electrolyte and uniformly introducing it into the electrolysis unit of the electrolytic cell through the inlet grooves 212 connected to it, allowing the electrolyte to flow more stably into the electrolysis unit. When multiple inlet grooves 212 are provided, the number of inlet grooves 212 can increase the amount of electrolyte conveyed, thereby improving the overall electrolysis efficiency. The multiple inlet grooves 212 and the inlet grooves 212 connected to them together constitute the electrolyte flow path, which can further improve the current efficiency, allowing the electrolyte to participate more fully in the electrolysis reaction and improving the electrolysis efficiency.

[0071] For example, when there is one or more gas outlet chambers 221, the gas outlet groove 222 connected to the gas outlet chamber 221 serves as the initial channel for the reaction gas to exit the electrolysis unit. It is used to receive the gas transmitted by the electrolysis unit and to collect the received gas into the gas outlet chamber 221 to achieve gas collection, thereby reducing gas flow resistance and allowing the collected gas to be smoothly discharged through the gas outlet chamber 221, thus improving gas collection efficiency. When multiple gas outlet chambers 221 are provided, the gas collection efficiency can be further improved.

[0072] It should be noted that, in addition to setting the liquid inlet groove 212 and the gas outlet groove 222 to have a curved section 230, at least one of the liquid inlet chamber 211 and the gas outlet chamber 221 can also be set to have a curved section, in order to extend the flow path of the electrolyte or gas and optimize the uniformity of fluid delivery.

[0073] like Figure 6 , Figure 7 , Figure 8 As shown, in one embodiment, at least one of the liquid inlet groove 212 and the air outlet groove 222 is multiple.

[0074] For example, the number of liquid inlet grooves 212 communicating with each liquid inlet chamber 211 is one or more; the number of air outlet grooves 222 communicating with each air outlet chamber 221 is one or more.

[0075] At least some of the multiple liquid inlet grooves 212 and gas outlet grooves 222 have curved sections. The design of the curved sections 230 can extend the fluid flow path, increase the bypass resistance, and thus reduce the bypass current and the leakage of bypass current.

[0076] In some examples, taking one liquid inlet groove 212 connected to each liquid inlet chamber 211 as an example, when there is one liquid inlet groove 212, the structure can be simplified while improving current efficiency and optimizing hydrogen production effect, so that the electrolyte can flow smoothly.

[0077] In other examples, taking the number of inlet channels 212 communicating with each inlet chamber 211 as an example, when multiple inlet channels 212 are provided, the inlet channels 212 can be flexibly arranged on the same side of the inlet chamber 211 or distributed on different sides of the inlet chamber 211. By increasing the number of inlet channels 212, the current efficiency can be further improved and the hydrogen production effect optimized.

[0078] In embodiments where one or more outlet grooves 222 are connected to each outlet chamber 221, the aforementioned embodiments where one or more inlet grooves 212 are connected to each inlet chamber 211 can be referred to. This simplifies the structure and stabilizes the gas flow rate when one outlet groove 222 is provided for each outlet chamber 221, and allows for smooth discharge. In embodiments where multiple outlet grooves 222 are provided for each outlet chamber 221, the gas collection efficiency is further improved. These will not be elaborated upon here.

[0079] like Figure 5 , Figure 6 As shown, in one embodiment, at least one of the liquid inlet chamber 211 and the air outlet chamber 221 is any one or a combination of multiple shapes such as waist-shaped, straight, curved, and circular.

[0080] Taking the liquid inlet chamber 211 as any one or a combination of waist-shaped, straight, curved, and circular shapes as an example, the waist-shaped liquid inlet chamber 211 has arc-shaped ends, which is conducive to fluid collection, mixing and uniform transmission, and its layout is relatively compact; the straight liquid inlet chamber 211 has small flow resistance due to its straight design and simple overall structure; the curved liquid inlet chamber 211 can be in the form of a reciprocating snake shape, arc shape, broken line shape or any other shape suitable for practical use, and the flow channel layout is relatively compact. The curved design can increase the liquid inlet path length, and by increasing the liquid inlet path length, the bypass resistance can be increased and the leakage of the bypass circuit can be reduced, thereby improving the electrolysis current efficiency; the circular liquid inlet chamber 211 can reduce flow resistance and evenly distribute the electrode liquid and other fluids in all directions.

[0081] In addition, the liquid inlet chamber 211 can be waist-shaped, straight, curved, circular, or other combinations; different parts of the liquid inlet chamber 211 can also be set to different types of shapes, which can be set according to the actual situation and are not limited here.

[0082] The specific implementation of the air outlet chamber 221, which can be any one or a combination of waist-shaped, straight, curved, or circular shapes, can be referred to the embodiment of the liquid inlet chamber 211, and will not be described in detail hereafter.

[0083] In some embodiments, the electrolytic cell electrode plate 10 is any one of circular, rectangular, elliptical, or a combination thereof. The specific shape can be determined according to actual conditions and is not limited herein. When the electrolytic cell electrode plate 10 is circular, the electrolyte and reactant gases are distributed more evenly, improving electrolysis efficiency. The round structure without sharp edges also optimizes impact resistance and extends service life. When the electrolytic cell electrode plate 10 is rectangular, it facilitates processing and assembly, is suitable for large-scale production, and allows for easy planning of the flow channel structure, while also improving space utilization. When the electrolytic cell electrode plate 10 is elliptical, it combines the advantages of both circular and rectangular electrode plates 10, resulting in a uniform flow channel distribution and ease of electrode plate processing.

[0084] like Figure 7 , Figure 8 As shown, in one embodiment, the liquid inlet chamber 211 and the gas outlet chamber 221 are arranged opposite to each other. For example, the line connecting the liquid inlet chamber 211 and the center line of the main electrode plate 100, and the line connecting the gas outlet chamber 221 and the center line of the main electrode plate 100 are at 180°, the liquid inlet chamber 211 and the gas outlet chamber 221 are arranged opposite to each other, and are symmetrically distributed about the center point of the main electrode plate 100.

[0085] For example, the electrolytic cell electrode 10 can be any one of a circle, rectangle, or ellipse. When the electrolytic cell electrode 10 is circular, the positions of the liquid inlet chamber 211 and the gas outlet chamber 221 are symmetrical about the circle; when the electrolytic cell electrode 10 is rectangular, the positions of the liquid inlet chamber 211 and the gas outlet chamber 221 are located on the same diagonal line; the specific configuration can be determined according to actual conditions and is not limited here.

[0086] The liquid inlet chamber 211 and the gas outlet chamber 221 are arranged opposite to each other, which can make the flow of electrolyte more uniform, reduce the problem of excessively fast or slow local flow of electrolyte, and improve the efficiency of electrolysis reaction and current efficiency; it can also promote the rapid discharge of gases (hydrogen, oxygen) produced by the reaction, and reduce the safety hazards that may occur due to excessively high local gas concentration.

[0087] Some embodiments of this application also propose an electrolysis unit.

[0088] like Figure 9 As shown, the electrolysis unit includes an anode plate 410, a positive electrode 420, a diaphragm 430, a negative electrode 440, and a cathode plate 450 arranged sequentially along the first direction D1.

[0089] The anode plate 410 serves as a current collector, providing structural support and uniformly distributing current from the external power source to the surface of the anode 420, ensuring a uniform current density distribution. During electrolysis, an oxidation reaction occurs on the surface of the anode 420, producing oxygen, chlorine, and other gases. A reduction reaction occurs on the surface of the cathode 440, which receives electrons from the cathode plate 450, producing hydrogen and other gases. The cathode plate 450 also serves as a current collector, collecting electrons from the external circuit and uniformly conducting them to the surface of the cathode 440. The diaphragm 430 selectively allows ion migration to complete the current loop while simultaneously preventing the mixing of anode and cathode products.

[0090] At least one of the anode plate 410 and the cathode plate 450 adopts the electrolytic cell electrode plate 10 as described in the above embodiment.

[0091] Taking the aforementioned electrolytic cell electrode plate 10 as an example, the anode plate 410 uses the aforementioned electrode plate 10. The anode 420 includes a main electrode plate 100 and an electrode frame 200. The electrode frame 200 is provided with an inlet chamber 211, an outlet chamber 221, an inlet groove 212, and an outlet groove 222. The inlet groove 212 connects the inlet chamber 211 and the surface of the main electrode plate 100. The outlet groove 222 connects the surface of the main electrode plate 100 and the outlet chamber 221. The electrolyte enters the electrolysis unit through the inlet chamber 211, the inlet groove 212, and the surface of the anode plate 410. Through the electrolysis reaction, gases such as oxygen and chlorine are generated in the anode 420. The generated gases are discharged through the outlet groove 222 and the outlet chamber 221.

[0092] Taking the cathode plate 450 using the aforementioned electrolytic cell electrode plate 10 as an example, the cathode plate 450 includes a main electrode plate 100 and an electrode frame 200. The electrode frame 200 is provided with a liquid inlet chamber 211, a gas outlet chamber 221, a liquid inlet groove 212, and a gas outlet groove 222. The liquid inlet groove 212 connects the liquid inlet chamber 211 and the surface of the main electrode plate 100, and the gas outlet groove 222 connects the surface of the main electrode plate 100 and the gas outlet chamber 221. The electrolyte enters the electrolysis unit through the liquid inlet chamber 211, the liquid inlet groove 212, and the surface of the cathode plate 450. Hydrogen gas is generated at the cathode electrode 440 through the electrolysis reaction, and the generated hydrogen gas is discharged through the gas outlet groove 222 and the gas outlet chamber 221.

[0093] The anode plate 410, the liquid inlet groove 212 of the anode plate 410, and the gas outlet groove 222 can have curved sections 230. The design of the curved sections can extend the fluid flow path and increase the bypass resistance, thereby reducing the bypass current and the leakage of the bypass current, and increasing the internal electrolysis current, thereby improving the current efficiency. This allows the internal electrolysis current to more effectively utilize electrical energy for electrolysis reactions during the electrolysis process, thereby improving the purity and quality of the hydrogen production products and optimizing the hydrogen production effect.

[0094] The specific structure of the electrolytic cell electrode plate 10 is as described in the above embodiments. Since the anode plate 410 and cathode plate 450 adopt all the technical solutions of all the above embodiments, they have at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0095] Some embodiments of this application also propose an electrolytic cell. The electrolytic cell includes the electrolysis unit of the above embodiments. The specific structure of the electrolysis unit is the same as that of the above embodiments. Since this electrolytic cell 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, and will not be described in detail here.

[0096] For example, there are multiple electrolysis units, which are stacked along the first direction D1.

[0097] An electrolysis unit can be an electrolysis chamber, and multiple electrolysis units can be connected in series or in parallel. In series connection, adjacent electrolysis units are connected via bipolar plates; that is, the cathode plate of the preceding unit shares the same bipolar plate with the anode plate of the following unit. The anode plate of the first electrolysis unit is connected to the positive terminal of the power supply, the anode plate is connected to the anode plate of the second electrolysis unit, and so on, with the cathode plate of the last electrolysis unit connected to the negative terminal of the power supply, forming a series circuit of "anode → bipolar plate cathode / anode → cathode". In parallel connection, the anode plates of all electrolysis units are connected to the positive terminal of the power supply, and the cathode plates are connected to the negative terminal of the power supply, forming a parallel circuit.

[0098] like Figure 7 , Figure 8 , Figure 9 As shown, in one embodiment, the electrolytic cell electrode 10 can be used as a bipolar plate. The electrolytic cell electrode 10 has a first surface 301 and a second surface 302 disposed opposite to each other. The first surface 301 is configured as the anode plate 410 of one of two adjacent electrolytic units, and the second surface 302 is configured as the cathode plate 450 of the other of the two adjacent electrolytic units.

[0099] When the electrolysis units are connected in series, taking one of two adjacent electrolysis units as the first electrolysis unit and the other as the second electrolysis unit as an example, when the electrolysis cell plate 10 is used as a bipolar plate, the first surface 301 is configured as the anode plate of the first electrolysis unit and the second surface 302 is configured as the cathode plate of the second electrolysis unit.

[0100] The electrolyte (such as water, alkaline solution, etc.) enters the inlet groove 212 through the inlet cavity 211 of the first surface 301, and then enters the first electrolysis unit from the surface of the anode plate. In the first electrolysis unit, it is electrolyzed to generate gases such as oxygen. The generated oxygen and other gases enter the outlet cavity 221 through the outlet groove 222 and are discharged through the outlet cavity 221 to obtain the oxygen to be treated (oxygen, or a mixture of oxygen and electrolyte).

[0101] The electrolyte (such as water, alkaline solution, etc.) enters the inlet groove 212 through the inlet cavity 211 of the second surface 302, and then enters the second electrolysis unit from the surface of the cathode plate, where it is electrolyzed to generate hydrogen gas. The generated hydrogen gas enters the outlet cavity 221 through the outlet groove 222 and is discharged through the outlet cavity 221 to obtain the hydrogen gas to be treated (hydrogen gas, or a mixture of hydrogen gas and electrolyte).

[0102] Among them, at least one of the liquid inlet groove 212 and the gas outlet groove 222 has a curved section 230. The design of the curved section can extend the length of the liquid inlet groove 212 and the gas outlet groove 222, increase the bypass resistance, thereby reducing the bypass current and the leakage of bypass current, and increasing the internal electrolysis current, thereby improving the current efficiency. This allows the internal electrolysis current to more effectively utilize electrical energy for electrolysis reactions during the electrolysis process, effectively solving the problem of current leakage affecting the quality of hydrogen production products, thereby improving the purity and quality of hydrogen production products and optimizing the hydrogen production effect.

[0103] In this embodiment, the first surface 301 and the second surface 302 can be interchanged. For example, the first surface 301 can be configured as the cathode plate 450 of the first electrolysis unit, and the second surface 302 can be configured as the anode plate 410 of the second electrolysis unit. The flow channel structures of the first surface 301 and the second surface 302 can be the same or different. For example, the number of outlet grooves 222 on the cathode plate can be no less than the number of outlet grooves 222 on the anode plate; the specific configuration can be based on actual conditions and is not limited here.

[0104] like Figure 7 , Figure 8 As shown, in one embodiment, the position of the flow channel structure of the anode plate 410 and the position of the flow channel structure of the cathode plate 450 may be the same or staggered.

[0105] Taking the example that the position of the flow channel structure of the anode plate 410 is the same as the position of the flow channel structure of the cathode plate 450, the structure can be simplified and manufacturing can be facilitated.

[0106] Taking the position of the flow channel structure of the anode plate 410 and the position of the flow channel structure of the cathode plate 450 as an example, the positions of the liquid inlet chamber 211 and the gas outlet chamber 221 of the anode plate 410 and the liquid inlet chamber 211 and the gas outlet chamber 221 of the cathode plate 450 can be staggered; or the positions of the liquid inlet groove 212 and the gas outlet groove 222 of the anode plate 410 and the liquid inlet groove 212 and the gas outlet groove 222 of the cathode plate 450 can be staggered; the specific configuration can be determined according to actual conditions and is not limited here.

[0107] During electrolysis, the cathode 440 generates hydrogen and the anode 420 generates oxygen. The staggered arrangement of the flow channels (inlet chamber 211, inlet groove 212, outlet chamber 221, outlet groove 222) on different surfaces of the bipolar plates reduces gas sealing defects and gas permeation caused by identical flow channel positions, thus minimizing cross-contamination and ensuring gas purity. This arrangement also ensures more uniform electrolyte flow, reducing localized excessively fast or slow flow and improving electrolysis efficiency and current efficiency. Furthermore, it reduces the risk of plate deformation or cracking due to stress concentration during long-term operation, extending the equipment's lifespan.

[0108] The above description is merely an exemplary embodiment of this application and does not limit the patent scope 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 patent protection scope of this application.

Claims

1. An electrolytic cell electrode plate (10), characterized in that, It includes a main electrode plate (100) and an electrode frame (200). The electrode frame (200) is provided with a liquid inlet chamber (211), an air outlet chamber (221), a liquid inlet groove (212), and an air outlet groove (222). The liquid inlet groove (212) connects the liquid inlet chamber (211) and the surface of the main electrode plate (100). The air outlet groove (222) connects the surface of the main electrode plate (100) and the air outlet chamber (221). At least one of the liquid inlet groove (212) and the gas outlet groove (222) has a curved segment (230).

2. The electrolytic cell electrode plate (10) as described in claim 1, characterized in that, The liquid inlet groove (212) includes a first section (2121) and a second section (2122). The first section (2121) is connected to the liquid inlet chamber (211), and the second section (2122) is connected to the surface of the main electrode plate (100). The first segment (2121) and the second segment (2122) are connected by the curve segment (230).

3. The electrolytic cell electrode plate (10) as described in claim 1, characterized in that, The exhaust groove (222) includes a third section (2221) and a fourth section (2222). The third section (2221) is connected to the surface of the main electrode plate (100), and the fourth section (2222) is connected to the exhaust chamber (221). The third segment (2221) and the fourth segment (2222) are connected by the curve segment (230).

4. The electrolytic cell electrode plate (10) as described in claim 1, characterized in that, A portion of the liquid inlet groove (212) extends circumferentially along the pole frame (200); And / or, a portion of the vent groove (222) is provided to extend circumferentially along the pole frame (200).

5. The electrolytic cell electrode plate (10) as described in claim 1, characterized in that, The curved segment (230) is arc-shaped.

6. The electrolytic cell electrode plate (10) as described in any one of claims 1 to 5, characterized in that, The number of at least one of the liquid inlet groove (212) and the air outlet groove (222) is multiple.

7. The electrolytic cell electrode plate according to any one of claims 1 to 5, characterized in that, At least one of the liquid inlet chamber (211) and the air outlet chamber (221) is any one or a combination of waist-shaped, straight, curved, and circular shapes.

8. An electrolysis unit, characterized in that, The electrolysis unit includes an anode plate (410), a positive electrode (420), a diaphragm (430), a negative electrode (440), and a cathode plate (450) arranged sequentially along a first direction; At least one of the anode plate (410) and the cathode plate (450) is an electrolytic cell electrode plate (10) as described in any one of claims 1 to 7.

9. An electrolytic cell, characterized in that, It includes the electrolysis unit as described in claim 8, wherein there are multiple electrolysis units, and the multiple electrolysis units are stacked along a first direction.

10. The electrolytic cell as described in claim 9, characterized in that, The electrolytic cell electrode plate (10) has a first surface (301) and a second surface (302) arranged opposite to each other. The first surface (301) is configured as the anode plate (410) of one of two adjacent electrolytic units, and the second surface (302) is configured as the cathode plate (450) of the other of two adjacent electrolytic units.

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