Small electrolysis chamber and electrolytic bath

Abstract

The invention provides an electrolytic cell and an electrolytic bath, the electrolytic cell comprises at least one electrolytic cell, the electrolytic cell comprises a polar plate assembly, and a circulation port, a diversion structure and a cavity arranged on the polar plate assembly, the circulation port and the cavity are communicated through the diversion structure, and the polar plate assembly comprises a polar plate and a frame which are connected with each other; one part of the diversion structure is arranged on the frame, and the other part of the diversion structure is arranged on the polar plate, so that the space of a flow field between the circulation opening and the cavity is enlarged. The flow field design between the circulation opening and the cavity is improved, the flow channel type polar plate and the flow channel type frame are combined to form the small electrolysis chamber structure of the flow guide structure, the water inlet and outlet amount of the electrolytic bath can be increased, the water inlet and outlet pressure can be reduced, and therefore mass transfer is enhanced, oxygen generated in the water electrolysis process is discharged in time, mass transfer resistance is reduced, and the service life of the electrolytic bath is prolonged. And meanwhile, the flow guide structure is arranged, so that heat transfer can be enhanced, heat is taken away, and the operation stability and the overall performance of the electrolytic cell are improved.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production by electrolysis, and in particular to an electrolysis chamber and an electrolysis cell. Background Art

[0002] New energy has received extensive attention as a key research and development area. Hydrogen energy, as a pollution-free and renewable energy, has become one of the future energy sources. Compared with the material pollution caused by the storage of electric energy, hydrogen energy can store its chemical energy in the form of hydrogen, which has the advantages of being pollution-free and green. An electrolyzer is a device that converts electrical energy into chemical energy. When the electrolyzer is powered on, water can be electrolyzed into hydrogen and oxygen, and electrical energy can be converted into chemical energy. Therefore, the electrolyzer can use the surplus and difficult-to-store part of the electrical energy to prepare hydrogen for storage, thus avoiding energy waste. As a highly promising and sustainable clean energy technology, proton exchange membrane electrolyzer technology has made great progress in technology maturity and commercialization in the past few decades. Further exploration and optimization are needed for the real application of proton exchange membrane electrolyzers, improving the performance of electrolyzers, reducing the cost of electrolyzers, and maintaining long-term stable operation of electrolyzers.

[0003] During the working process of the electrolyzer, pure water needs to be continuously input as the "raw material" for electrolysis in the electrolyzer, and the electrolyzer needs to be powered on. Therefore, the electrolyzer is a complex workbench that integrates "electricity, water, gas, and heat". In order to improve the energy conversion efficiency and performance optimization of the electrolyzer, the design of the electrolyzer is an extremely important link. Under high current density, a large amount of water is electrolyzed in the catalyst layer on the anode side to produce oxygen, hydrogen ions and electrons. The hydrogen ions move to the cathode through the proton exchange membrane, and the electrons reach the cathode through the external circuit. On the cathode side, hydrogen ions and electrons combine to generate hydrogen. A large amount of oxygen will gradually accumulate in the diffusion layer on the anode side of the electrolyzer, and the pores of the diffusion layer will be blocked by oxygen bubbles. The unreacted water cannot pass through the diffusion layer to reach the catalyst layer for continuous reaction, which increases the mass transfer resistance inside the electrolyzer, thereby reducing the electrolysis efficiency. Due to the increase in mass transfer resistance, the flow rate of the water flow field decreases, and the thermal conductivity of oxygen is much smaller than that of water. If the generated oxygen is not discharged in time, it will affect the heat dissipation of the electrolyzer, causing local overheating of the electrolyzer. In severe cases, it will cause the proton exchange membrane to rupture, posing a safety hazard. Summary of the invention

[0004] In view of this, the present application provides an electrolysis chamber and an electrolysis cell that can effectively solve the above-mentioned problems.

[0005] The present application provides an electrolysis chamber, comprising a plate assembly and a flow port, a flow guide structure, and a cavity arranged on the plate assembly, wherein the flow port and the cavity are connected through the flow guide structure, the plate assembly comprises a connected plate and a frame, a portion of the flow guide structure is arranged on the frame, and another portion is arranged on the plate.

[0006] In one embodiment, the flow guide structure includes a first slot provided on the electrode plate and a second slot provided on the frame, the first slot is connected to the second slot, and the flow port and the cavity are connected through the first slot and the second slot.

[0007] In one embodiment, the guide structure includes a plurality of guide parts and a plurality of guide channels formed by the plurality of guide parts, one end of the guide part is connected to the first slot and the other end is connected to the second slot, and the guide channel connects the flow port and the cavity.

[0008] In one embodiment, the guide portion includes a first part and a second part, the first part is detachable or integrally connected to the bottom wall of the first groove, the second part is detachable or integrally connected to the bottom wall of the second groove, and the first part abuts against the second part.

[0009] In one embodiment, one end of the guide portion is detachable or integrally connected to the bottom wall of the first groove, and the other end abuts against the bottom wall of the second groove; or, one end of the guide portion is detachable or integrally connected to the bottom wall of the second groove, and the other end abuts against the bottom wall of the first groove.

[0010] In one embodiment, the circulation port includes a water inlet and a water outlet, and the water inlet and the water outlet are respectively arranged on opposite sides of the electrode plate assembly, the water inlet includes a first water inlet portion arranged on the electrode plate and a second water inlet portion correspondingly arranged on the frame, and the water outlet includes a first water outlet portion arranged on the electrode plate and a second water outlet portion correspondingly arranged on the frame.

[0011] In one embodiment, the cavity includes a first cavity portion and a second cavity portion that correspond to and are connected, the first cavity portion is arranged on a side of the electrode plate close to the frame, and the second cavity portion is a hollow cavity of the frame; at least one guide field is provided in the first cavity portion, and the guide field includes a first guide array formed by a plurality of guide ribs arranged and / or a second guide array formed by a plurality of bosses arranged.

[0012] In one embodiment, the electrolysis chamber includes an anode diffusion layer and an anode frame sealing layer, wherein the anode frame sealing layer is disposed between the electrode plate and the frame, the anode diffusion layer is disposed in the second cavity, and the thickness of the anode diffusion layer is the sum of the thickness of the frame and the anode frame sealing layer.

[0013] In one embodiment, the electrode plate is an anode plate, and the flow guiding structure is arranged on the anode surface of the anode plate; or, the electrode plate is a bipolar plate, and the flow guiding structure is arranged on one or both polar surfaces of the bipolar plate.

[0014] The present application also provides an electrolytic cell, comprising the electrolytic chamber as described above.

[0015] In summary, the present application provides an electrolysis chamber and an electrolytic cell, the electrolytic cell comprising at least one electrolysis chamber, the electrolysis chamber comprising a plate assembly and a flow port, a flow guide structure, and a cavity provided on the plate assembly, the flow port and the cavity being connected through the flow guide structure, the plate assembly comprising a connected plate and a frame, a portion of the flow guide structure being provided on the frame, and another portion being provided on the plate, thereby increasing the space of the flow field between the flow port and the cavity. The present application improves the flow field design between the flow port and the cavity, and adopts an electrolysis chamber structure with a flow guide structure formed by combining a flow channel plate with a flow channel frame, which can increase the water inlet and outlet of the electrolytic cell, reduce the water inlet and outlet pressure, thereby strengthening mass transfer, timely discharging the oxygen generated in the process of electrolysis of water, reducing mass transfer resistance, thereby reducing voltage loss, and at the same time, providing a flow guide structure can also strengthen heat transfer, take away heat, improve electrolysis reaction and conversion efficiency, and improve the operation stability of the electrolytic cell and the overall performance of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an electrolysis chamber in one embodiment of the present application.

[0017] Figure 2 for Figure 1 Schematic diagram of the exploded view of the electrolysis chamber.

[0018] Figure 3 It is a three-dimensional schematic diagram of a plate assembly of an electrolysis chamber in another embodiment of the present application.

[0019] Figure 4 for Figure 3 A three-dimensional schematic diagram of the electrode plates of the middle electrode plate assembly in one embodiment.

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of part A.

[0021] Figure 6 for Figure 4 Front view of the plates of the middle plate assembly.

[0022] Figure 7 for Figure 3 A front view of a plate of a center plate assembly in another embodiment.

[0023] Figure 8 for Figure 3 A front view of a frame of a center plate assembly in another embodiment.

[0024] Fig. 9 for Figure 8 Schematic diagram of the enlarged portion B.

[0025] Fig.10 for Figure 3 A perspective cross-sectional view of a center plate assembly in one embodiment.

[0026] Fig.11 for Fig.10 Enlarged schematic diagram of part C.

[0027] Fig.12 for Figure 3 A perspective cross-sectional view of a center plate assembly in another embodiment.

[0028] Fig.13 for Fig.12 Enlarged schematic diagram of part D in the figure.

[0029] Figures: 10-electrolysis chamber; 12-anode plate; 14-anode frame sealing layer; 16-anode frame; 18-anode sealing layer; 20-anode diffusion layer; 22-proton exchange membrane; 24-cathode sealing layer; 26-cathode frame; 28-cathode frame sealing layer; 30-cathode diffusion layer; 38-cathode plate; 40-anode connection terminal; 42-cathode connection terminal; 44-plate assembly; 441-plate; 442-frame; 46-flow guide structure; 47-cavity; 48-water inlet; 481-first Water inlet; 482-second water inlet; 50-water outlet; 501-first water outlet; 502-second water outlet; 52-first cavity; 54-second cavity; 56-first slot; 58-second slot; 60-flow guide; 601-first part; 602-second part; 62-flow guide channel; 621-first flow guide channel; 622-second flow guide channel; 64-flow guide rib; 66-first flow guide array; 68-boss; 70-second flow guide array; 72-first flow channel; 74-second flow channel. DETAILED DESCRIPTION

[0030] Before describing the embodiments in detail, it should be understood that the present application is not limited to the detailed structure or component arrangement described below or in the drawings in the present application. The present application may be an embodiment implemented in other ways. Moreover, it should be understood that the words and terms used herein are only used for descriptive purposes and should not be interpreted restrictively. The words "including", "comprising", "having" and the like used herein are meant to include the items listed thereafter, their equivalents and other additional items. In particular, when describing "a certain element", the present application does not limit the number of the element to one, but may also include multiple elements.

[0031] Please also refer to Figure 1 and Figure 2As shown, the present application provides an electrolysis chamber 10, which is used to electrolyze the water to be electrolyzed to produce hydrogen and oxygen. Specifically, the overall design of the electrolysis chamber 10 is square, and in other embodiments, the electrolysis chamber 10 can also be designed as other shapes. The electrolysis chamber 10 has a relative anode side and a cathode side. In the direction from the anode side to the cathode side, the electrolysis chamber 10 includes an anode plate 12, an anode frame sealing layer 14, an anode frame 16, an anode sealing layer 18, an anode diffusion layer 20, a proton exchange membrane 22, a cathode sealing layer 24, a cathode frame 26, a cathode frame sealing layer 28, a cathode diffusion layer 30, and a cathode plate 38, and the proton exchange membrane 22 is coated with an anode catalyst layer on one side of the anode sealing layer 18, and the proton exchange membrane 22 is coated with a cathode catalyst layer on one side of the cathode sealing layer 24. Of course, in other embodiments, when the electrode plate is a bipolar plate, both sides of the electrode plate may also have flow-conducting structures respectively. The structure of the electrolysis chamber 10 is not limited to the above-mentioned example, and the electrolysis chamber 10 may also have other structural designs.

[0032] The functional layers of the electrolysis chamber 10 are fixedly connected to each other. For example, the peripheral areas of the anode plate 12, the anode frame sealing layer 14, the anode frame 16, the anode sealing layer 18, the proton exchange membrane 22, the cathode sealing layer 24, the cathode frame 26, the cathode frame sealing layer 28 and the cathode plate 38 are respectively provided with fixing holes corresponding to each other, and can be fastened by fixing members such as bolts. The anode frame 16 and the cathode frame 26 are respectively provided with a hollow cavity, and the anode diffusion layer 20 is located in the hollow cavity of the anode frame 16, and the anode diffusion layer 20 is clamped and fixed between the anode sealing layer 18 and the proton exchange membrane 22; the cathode diffusion layer 30 is located in the hollow cavity of the cathode frame 26, and the cathode diffusion layer 30 is clamped and fixed between the cathode frame sealing layer 28 and the cathode plate 38.

[0033] Preferably, on the anode side, the anode diffusion layer 20 is titanium felt, and when installed, the titanium felt is bonded to the anode catalyst layer. The use of titanium felt in the anode diffusion layer 20 can improve the flow and transmission of gas and liquid, while increasing the specific surface area in contact with gas and liquid, thereby improving the electrolysis reaction efficiency and conversion efficiency. In addition, the structure of the titanium felt can reduce the generation of gas bubbles and improve the release of gas. On the cathode side, the cathode diffusion layer 30 can be selected as any one or more of carbon cloth, stainless steel felt, titanium felt or titanium mesh, and when installed, the cathode diffusion layer 30 is bonded to the cathode catalyst layer.

[0034] A first flow port for fluid circulation is provided on the frame of the anode frame 16 and the peripheral area corresponding to the anode plate 12, and a second flow port for fluid circulation is provided on the frame of the cathode frame 26 and the peripheral area corresponding to the cathode plate 38, wherein the first flow port may include a water inlet and a water outlet, and the second flow port may include a hydrogen outlet. An anode connection terminal 40 is formed on one side of the anode plate 12, and a cathode connection terminal 42 is formed on one side of the cathode plate 38, and the anode connection terminal 40 and the cathode connection terminal 42 are electrically connected through an external circuit. In other embodiments, when the plate is used as a bipolar plate, the above-mentioned connection terminal does not need to be provided. When the electrolysis chamber 10 is in operation, the water to be electrolyzed enters from the water inlet and reaches the anode catalyst layer through the anode diffusion layer 20 for oxidation reaction, generating oxygen, hydrogen ions and electrons, and the hydrogen ions reach the cathode catalyst layer through the proton exchange membrane 22, and the electrons are transmitted from the external circuit to the cathode plate 38 and then reach the cathode catalyst layer through the cathode diffusion layer 30, and the hydrogen ions combine with the electrons to generate hydrogen.

[0035] Please also refer to Figure 3 , Fig.10 and Fig.12 As shown, the electrolysis chamber 10 provided in the present application includes a plate assembly 44 and a flow port, a guide structure 46, and a cavity 47 arranged on the plate assembly 44. The flow port and the cavity 47 are connected through the guide structure 46. The flow port is arranged, for example, through the thickness direction of the plate assembly 44. The plate assembly 44 includes a connected plate 441 and a frame 442. In the embodiment shown, the guide structure 46 is arranged on the anode side of the electrolysis chamber 10. Therefore, the plate 441 of the plate assembly 44 is the anode plate 12, and the frame 442 of the plate assembly 44 is the anode frame 16. A part of the guide structure 46 is arranged on the frame 442, and the other part is arranged on the plate 441, thereby increasing the flow field space between the flow port and the cavity 47. The present application improves the flow field design between the flow port and the cavity 47, and adopts an electrolysis chamber structure with a flow guide structure 46 formed by combining a flow channel plate 441 and a flow channel frame 442. This can increase the water inlet and outlet of the electrolytic cell and reduce the water inlet and outlet pressure, thereby enhancing mass transfer, timely discharging the oxygen generated in the process of water electrolysis, reducing mass transfer resistance, and thus reducing voltage loss. At the same time, the provision of the flow guide structure 46 can also enhance heat transfer, take away heat, and improve the operating stability of the electrolytic cell and the overall performance of the electrolytic cell.

[0036] In the illustrated embodiment, please also refer to Fig.11 and Fig.13As shown, the flow port includes a water inlet 48 and a water outlet 50, and the water inlet 48 and the water outlet 50 are respectively arranged on opposite sides of the plate assembly 44, for example, two water inlets 48 are arranged at intervals on the side of the plate assembly 44, and two water outlets 50 are arranged correspondingly, and the two water outlets 50 are arranged at intervals on the side of the plate assembly 44, and the two water inlets 48 and the two water outlets 50 are arranged symmetrically about at least one center line of the plate assembly 44, such as the two water inlets 48 and the two water outlets 50 are symmetrical about the central vertical line of any opposite two sides of the plate assembly 44, so that the two water inlets 48 and the two water outlets 50 correspond one to one, which can increase the smoothness of the fluid flow. A flow guide structure 46 is arranged between the two water inlets 48 and the two water outlets 50 and the cavity 47. In the embodiment shown, the flow guide structures 46 at the water inlets 48 and the water outlets 50 are the same. In other embodiments, the water inlet 48 and the water outlet 50 may be set to other numbers or other positions, and the present application does not limit their numbers and positions.

[0037] The water inlet 48 includes a first water inlet portion 481 provided on the electrode plate 441 and a second water inlet portion 482 correspondingly provided on the frame 442, and the water outlet 50 includes a first water outlet portion 501 provided on the electrode plate 441 and a second water outlet portion 502 correspondingly provided on the frame 442. Preferably, the first water inlet portion 481 and the second water inlet portion 482 have the same size and are aligned vertically, and the first water outlet portion 501 and the second water outlet portion 502 have the same size and are aligned vertically.

[0038] Further, please also refer to Figure 4 and Figure 8 As shown, the cavity 47 includes a first cavity 52 and a second cavity 54 that are corresponding and connected. The first cavity 52 is arranged on the side of the electrode plate 441 close to the frame 442. The first cavity 52 is, for example, a groove structure, and the second cavity 54 is a hollow cavity of the frame 442. The first cavity 52 and the second cavity 54 have substantially the same size and correspond to each other up and down. The portion of the flow-guiding structure 46 arranged on the electrode plate 441 has its outer end connected to the first water inlet 481 or the first water outlet 501, and its inner end connected to the first cavity 52. ​​The portion of the flow-guiding structure 46 arranged on the frame 442 has its outer end connected to the second water inlet 482 or the second water outlet 502, and its inner end connected to the second cavity 54.

[0039] In this application, the plate 441 and the frame 442 are both designed as a flow channel structure. For details, please also refer to Figure 7 and Figure 8As shown, the flow guide structure 46 includes a first slot 56 provided on the electrode plate 441 and a second slot 58 provided on the frame 442, the first slot 56 and the second slot 58 are connected, and the flow port and the cavity 47 are connected through the first slot 56 and the second slot 58. In the embodiment shown, the first slot 56 is provided on the side of the electrode plate 441 opposite to the frame 442, and the second slot 58 is provided on the side of the frame 442 opposite to the electrode plate 441. Preferably, the first slot 56 and the second slot 58 have the same size and correspond to each other from top to bottom, the outer end of the first slot 56 is connected to the first water inlet 481 or the first water outlet 501, and the inner end is connected to the first cavity 52, and the outer end of the second slot 58 is connected to the second water inlet 482 or the second water outlet 502, and the inner end is connected to the second cavity 54.

[0040] Further, please also refer to Figure 5 , Fig. 9 , Fig.11 and Fig.13 As shown, the guide structure 46 includes a plurality of guide portions 60 and a plurality of guide channels 62 formed by the plurality of guide portions 60, one end of the guide portion 60 is connected to the first slot 56, and the other end is connected to the second slot 58. For example, the upper end of the guide portion 60 is connected to the first slot 56, and the lower end of the guide portion 60 is connected to the second slot 58, that is, the first slot 56 and the second slot 58 are separated by the plurality of guide portions 60 to form a guide channel 62, and the outer end of the guide channel 62 is connected to the flow port, and the inner end is connected to the cavity 47.

[0041] Preferably, the plurality of guide portions 60 are evenly spaced apart along the width direction of the first slot 56 and the second slot 58 , so that the structural design of the plurality of guide channels 62 is consistent, thereby ensuring the uniformity and stability of the fluid flow.

[0042] In such Figure 4-6In the illustrated embodiment, five guide portions 60 are provided, and the five guide portions 60 are provided perpendicular to the side of the electrode assembly 44. The opposite side walls of the first slot 56 in the width direction are curved in an arc shape in a direction away from each other near the first cavity 52, that is, the size of the first slot 56 near the first cavity 52 gradually increases, so that the guide channel 62 at the corresponding side wall can guide water to the side area of ​​the first cavity 52, thereby enhancing the uniformity of water flow distribution in the first cavity 52. ​​This part of the water flow can take away the oxygen distributed in the side area of ​​the first cavity 52, thereby avoiding problems such as oxygen accumulation affecting flow smoothness and local overheating. Similarly, the two opposite side walls of the second slot 58 in the width direction are curved in an arc shape in directions away from each other near the second cavity 54, that is, the size of the second slot 58 near the second cavity 54 gradually increases, so that the guide channel 62 at the corresponding side wall can guide water to the side area of ​​the second cavity 54, thereby enhancing the uniformity of water flow distribution in the second cavity 54. This part of the water flow can take away the oxygen distributed in the side area of ​​the second cavity 54, thereby avoiding oxygen accumulation affecting the flow smoothness and local overheating.

[0043] In such Figure 7-9 In the illustrated embodiment, three guide portions 60 are provided, and the three guide portions 60 are provided in a divergent shape toward one side of the cavity 47. The two opposite side walls in the width direction of the first slot 56 are curved in an arc shape in a direction away from each other, that is, the size of the first slot 56 gradually increases in the direction toward the first cavity 52; similarly, the two opposite side walls in the width direction of the second slot 58 are curved in an arc shape in a direction away from each other, that is, the size of the second slot 58 gradually increases in the direction toward the second cavity 54. With such a design, the guide channel 62 at the corresponding side wall can guide water to the side area of ​​the first cavity 52 or the second cavity 54, and enhance the uniformity of the distribution of the water flow in the first cavity 52 or the second cavity 54. This part of the water flow can take away the oxygen distributed in the side area of ​​the first cavity 52 or the second cavity 54, and avoid problems such as oxygen accumulation affecting the smoothness of the flow and local overheating. The guide channel 62 formed between the three guide portions 60 gradually increases in size in the direction toward the cavity 47, which can further reduce the inlet / outlet pressure.

[0044] In the illustrated embodiment, the guide portion 60 is designed as a strip-shaped guide rib. In other embodiments, the guide portion 60 may be designed as other shapes and structures according to actual design requirements, such as a point-shaped guide column.

[0045] In some embodiments, Figures 3 to 11As shown, the guide part 60 is divided into two parts, one part is connected to the electrode plate 441, and the other part is connected to the frame 442. Specifically, the guide part 60 includes a first part 601 and a second part 602. The first part 601 is detachably or integrally connected to the bottom wall of the first slot 56, and the second part 602 is detachably or integrally connected to the bottom wall of the second slot 58, and the opposite ends of the first part 601 and the second part 602 are in contact. Figure 3-8 In the illustrated embodiment, the flow guide channel 62 includes a first flow guide channel 621 and a second flow guide channel 622 that are connected to each other, the first part 601 is integrally connected to the first slot 56, that is, the first part 601 and the electrode plate 441 are an integrally formed structure, the first part 601 separates the first slot 56 to form the first flow guide channel 621, the second part 602 is integrally connected to the second slot 58, that is, the second part 602 and the frame 442 are an integrally formed structure, and the second part 602 separates the second slot 58 to form the second flow guide channel 622. In other embodiments, when the flow guide portion 60 is designed as a detachable structure, a suitable flow guide structure can be selected for replacement and assembly according to flow requirements, further improving the operating stability and overall performance of the electrolytic chamber 10, enhancing the flexibility of use, and expanding the scope of application of the product.

[0046] In other embodiments, Fig.12 and Fig.13 As shown, the guide part 60 is designed as a whole, and the guide part 60 can be connected to the electrode plate 441 or to the frame 442. Specifically, one end of the guide part 60 is detachable or integrally connected to the bottom wall of the first slot 56, and the other end is abutted against the bottom wall of the second slot 58; or, one end of the guide part 60 is detachable or integrally connected to the bottom wall of the second slot 58, and the other end is abutted against the bottom wall of the first slot 56. Figure 9-10 In the illustrated embodiment, the guide portion 60 is integrally connected to the bottom wall of the second slot 58 , that is, the guide portion 60 and the frame 442 are an integrally formed structure. During installation, the other end of the guide portion 60 abuts against the bottom wall of the first slot 56 .

[0047] In the illustrated embodiment, a flow guide field connected between the water inlet 48 and the water outlet 50 is provided in the first cavity 52, which can further enhance the smoothness of the fluid flow, increase the water inlet and outlet, and reduce the water inlet and outlet pressures. The increase in the water inlet can increase the reaction rate of the electrolysis chamber 10, thereby improving the electrolysis efficiency, and reducing the water inlet pressure can reduce the energy consumption of the electrolysis chamber 10, thereby reducing the operating cost. Specifically, at least one flow guide field is provided in the first cavity 52, and the flow guide field includes a first flow guide array 66 formed by arranging a plurality of flow guide ribs 64 and / or a second flow guide array 70 formed by arranging a plurality of bosses 68, the flow guide ribs 64 are, for example, straight strips, and the bosses 68 are, for example, circular, and the plurality of flow guide ribs 64 are spaced to form a first flow channel 72 for fluid flow, and the plurality of bosses 68 are spaced to form a second flow channel 74 for fluid flow, and the first flow channel 72 is connected to the second flow channel 74.

[0048] In this embodiment, Figure 4 , Figure 6 and Figure 7 As shown, three guide fields are provided, namely the first guide field, the second guide field and the third guide field, which are arranged along the spacing direction x from the water inlet 48 to the water outlet 50, wherein the first guide field and the third guide field are both second guide arrays 70, the second guide field is the first guide array 66, and the two second guide arrays 70 are arranged on both sides of the first guide array 66, wherein one second guide array 70 is arranged between the guide structure 46 on the water inlet 48 side and the first guide array 66, and the other second guide array 70 is arranged between the guide structure 46 on the water outlet 50 side and the first guide array 66.

[0049] Preferably, if Figure 6 and Figure 7 As shown, the guide ribs 64 extend along the spacing direction x, and a plurality of guide ribs 64 are evenly spaced and arranged perpendicular to the spacing direction x; a plurality of bosses 68 are arranged in multiple layers in the spacing direction x, and the multi-layer bosses 68 are evenly spaced and arranged, and a plurality of bosses 68 in each layer are evenly spaced and arranged perpendicular to the spacing direction x, and the two adjacent layers of bosses 68 are staggered with each other. The height of the guide field, that is, the height of the guide ribs 64 and the bosses 68 is not higher than the depth of the first cavity 52, that is, the upper surface of the guide ribs 64 and the bosses 68 is not higher than the upper surface of the electrode plate 441 (that is, the surface on the side opposite to the electrode plate 441 and the frame 442). The multi-flow field setting can distribute and drain the fluid in the cavity multiple times, making the flow field distribution more uniform. At the same time, the guide ribs 64 and the bosses 68 also support the anode diffusion layer 20.

[0050] In some embodiments, the electrolysis chamber 10 includes an anode diffusion layer 20 and an anode frame sealing layer 14, the anode frame sealing layer 14 is sandwiched between the electrode plate 441 and the frame 442 to enhance the airtightness between the electrode plate 441 and the frame 442, and the anode frame sealing layer 14 is provided with an avoidance structure corresponding to the flow guide structure 46 to avoid interference with the flow guide structure 46. The anode diffusion layer 20 is disposed in the second cavity 54, and the thickness of the anode diffusion layer 20 is the sum of the thickness of the frame 442 and the anode frame sealing layer 14.

[0051] In the present application, reasonable flow channel design and plate structure can solve the fatal defects of proton exchange membrane 22 such as water shortage and overheating, thereby extending the service life of proton exchange membrane 22. By setting the guide structure 46 on the plate 441 and the frame 442 at the same time, compared with the prior art, the thickness of the frame 442 can be reduced while increasing the space at the flow port. The frame 442 is thinned, and the thickness of the corresponding hollow cavity is thinned, so the thickness of the anode diffusion layer 20 can also be thinned, which can reduce the cost of the anode diffusion layer 20 to a certain extent. The anode diffusion layer 20 is one of the important components of the electrolysis chamber 10, and its cost accounts for a considerable part of the total cost. By thinning the thickness of the frame 442, the manufacturing cost can be reduced, thereby reducing the cost of the entire electrolysis chamber 10. In this embodiment, the plate 441 is the anode plate 12 of the electrolysis chamber 10, and the guide structure 46 is arranged on the anode surface of the anode plate 12. In other embodiments, the plate 441 can also be set as a bipolar plate, and the guide structure 46 can be set on one or both polar surfaces of the bipolar plate.

[0052] The present application also provides an electrolytic cell, which can be a proton exchange membrane electrolytic cell, comprising a first end plate, a second end plate and at least one electrolytic chamber as described above, wherein the at least one electrolytic chamber is stacked, and the first end plate and the second end plate are respectively arranged at the two ends of the stacking direction of the at least one electrolytic chamber, and the first end plate and the second end plate are relatively fixed, for example, fixed by bolts, so that the at least one electrolytic chamber is clamped and fixed between the first end plate and the second end plate, or the first end plate, the second end plate and the at least one electrolytic chamber are fixed together by bolts.

[0053] In summary, the present application provides an electrolysis chamber and an electrolytic cell, the electrolytic cell comprising at least one electrolysis chamber, the electrolysis chamber comprising a plate assembly and a flow port, a flow guide structure, and a cavity provided on the plate assembly, the flow port and the cavity being connected through the flow guide structure, the plate assembly comprising a connected plate and a frame, a portion of the flow guide structure being provided on the frame, and another portion being provided on the plate, thereby increasing the space of the flow field between the flow port and the cavity. The present application improves the flow field design between the flow port and the cavity, and adopts an electrolysis chamber structure with a flow guide structure formed by combining a flow channel plate with a flow channel frame, which can increase the water inlet and outlet of the electrolytic cell, reduce the water inlet and outlet pressure, thereby strengthening mass transfer, timely discharging the oxygen generated in the process of electrolysis of water, reducing the mass transfer resistance, thereby reducing the voltage loss, and at the same time providing a flow guide structure can increase the water inlet and outlet, which can improve the electrolysis reaction and conversion efficiency, and improve the operation stability of the electrolytic cell and the overall performance of the electrolytic cell.

[0054] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of this application is determined by the appended claims rather than by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of these claims.

Claims

1. An electrolysis chamber, characterized in that: The invention comprises a plate assembly (44), a flow port, a flow guide structure (46), and a cavity (47) arranged on the plate assembly (44); the flow port and the cavity (47) are connected via the flow guide structure (46); the plate assembly (44) comprises a plate (441) and a frame (442) connected to each other; a part of the flow guide structure (46) is arranged on the frame (442), and another part is arranged on the plate (441).

2. The electrolysis chamber according to claim 1, characterized in that The flow-guiding structure (46) comprises a first slot (56) provided on the electrode plate (441) and a second slot (58) provided on the frame (442); the first slot (56) and the second slot (58) are in communication; and the flow port and the cavity (47) are in communication via the first slot (56) and the second slot (58).

3. The electrolysis chamber according to claim 2, characterized in that The flow guiding structure (46) comprises a plurality of flow guiding portions (60) and a plurality of flow guiding channels (62) formed by spacing the plurality of flow guiding portions (60); one end of the flow guiding portion (60) is connected to the first slot (56) and the other end is connected to the second slot (58); the flow guiding channel (62) connects the flow port and the cavity (47).

4. The electrolysis chamber according to claim 3, characterized in that The guide portion (60) comprises a first part (601) and a second part (602), wherein the first part (601) is detachable or integrally connected to the bottom wall of the first slot (56), and the second part (602) is detachable or integrally connected to the bottom wall of the second slot (58), and the first part (601) and the second part (602) are in abutment with each other.

5. The electrolysis chamber according to claim 3, characterized in that One end of the guide portion (60) is detachable or integrally connected to the bottom wall of the first slot (56), and the other end abuts against the bottom wall of the second slot (58); or, one end of the guide portion (60) is detachable or integrally connected to the bottom wall of the second slot (58), and the other end abuts against the bottom wall of the first slot (56).

6. The electrolysis chamber according to any one of claims 1 to 5, characterized in that The circulation port comprises a water inlet (48) and a water outlet (50), wherein the water inlet (48) and the water outlet (50) are respectively arranged on opposite sides of the electrode assembly (44), wherein the water inlet (48) comprises a first water inlet portion (481) arranged on the electrode plate (441) and a second water inlet portion (482) correspondingly arranged on the frame (442), and wherein the water outlet (50) comprises a first water outlet portion (501) arranged on the electrode plate (441) and a second water outlet portion (502) correspondingly arranged on the frame (442).

7. The electrolysis chamber according to any one of claims 1 to 5, characterized in that The cavity (47) comprises a first cavity (52) and a second cavity (54) which are corresponding and connected, wherein the first cavity (52) is arranged on a side of the electrode plate (441) close to the frame (442), and the second cavity (54) is a hollow cavity of the frame (442); at least one guide field is arranged in the first cavity (52), and the guide field comprises a first guide array (66) formed by arranging a plurality of guide ribs (64) and / or a second guide array (70) formed by arranging a plurality of bosses (68).

8. The electrolysis cell according to claim 7, characterized in that The electrolysis chamber (10) comprises an anode diffusion layer (20) and an anode frame sealing layer (14); the anode frame sealing layer (14) is arranged between the electrode plate (441) and the frame (442); the anode diffusion layer (20) is arranged in the second cavity (54); and the thickness of the anode diffusion layer (20) is the sum of the thicknesses of the frame (442) and the anode frame sealing layer (14).

9. The electrolysis cell according to any one of claims 1 to 5, characterized in that The electrode plate (441) is an anode plate (12), and the flow-guiding structure (46) is arranged on the anode surface of the anode plate (12); or, the electrode plate (441) is a bipolar plate, and the flow-guiding structure (46) is arranged on one or both polar surfaces of the bipolar plate.

10. An electrolytic cell, characterized in that: It comprises an electrolysis chamber (10) as claimed in any one of claims 1 to 9.

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