Alkaline water electrolytic bath
By using the design of pole frame, bipolar plate, anode rib, elastic assembly and cathode net in alkali and water electrolytic cell, the problems of high manufacturing and assembly accuracy and low electrolytic efficiency of traditional electrolytic cells are solved, and higher electrolytic efficiency is achieved and lower power consumption, suitable for high-performance composite diaphragms and electrodes.
Patent Information
- Application Number
- CN202420680840.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-03
AI Technical Summary
Traditional alkali and water electrolytic cells have high requirements for manufacturing and assembly accuracy and low electrolytic efficiency, resulting in low electrolytic efficiency, high energy consumption, poor airtightness of the diaphragm, and inability to use high performance composite diaphragms and electrodes, resulting in large area and high cost of equipment.
An alkaline water electrolytic cell was designed, using pole frames, bipolar plates, anode ribs, elastic components and cathode mesh, fixed by welding and riveting, and multiple elastic components of "several" structures were used to absorb system pressure fluctuations and Assembly tolerance, suitable for high-performance composite diaphragms and electrodes, improving electrolytic efficiency.
It reduces manufacturing and assembly accuracy requirements, protects the diaphragm, improves operating current density, and reduces power consumption. It is suitable for high-performance composite diaphragms and electrodes, and improves the performance and efficiency of the electrolytic cell.
Smart Images
Figure CN222294215U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electrolytic cell, in particular to an alkaline water electrolytic cell. Background Art
[0002] Water electrolysis uses water as raw material and electricity as energy supply to produce hydrogen. The hydrogen produced by using renewable electricity sources such as wind and solar power is called green hydrogen. Water electrolysis has a high conversion efficiency and is an ideal source of green hydrogen. Alkaline water electrolyzer is one of the most important methods for producing hydrogen.
[0003] However, the electrolytic cells that are currently adapted to fluctuating energy supply have low electrolysis efficiency, high requirements for manufacturing precision and assembly precision, and poor product consistency, as follows: 1. The traditional electrolytic cell plate adopts a mastoid structure, and the internal matching gap is controlled by manufacturing tolerances, which requires high manufacturing precision and assembly precision; if the assembly gap is too large, it is difficult to achieve close fit between the cathode electrode and the anode electrode, that is, the membrane pole distance, the electrolysis voltage increases, the electrolysis efficiency decreases, and the energy consumption is high; if the assembly gap is too small, the pressure of the electrode on the diaphragm is too large, which can easily cause the diaphragm to fail. This is also the main reason why traditional electrolytic cells generally cannot use high-performance composite diaphragms and can only use PPS fabrics; 2. Traditional electrolytic cells use PPS fabrics as diaphragms, which have poor air tightness and cannot withstand rapid load fluctuations, and cannot withstand low-load operation. The risk of hydrogen and oxygen cross-talk and even explosion is high; high-performance electrodes cannot be used, the operating electric density is low, and the production capacity of a single set of equipment is low. That is, under the same production capacity, the equipment occupies a large area and has a high cost.
[0004] Therefore, how to design an alkaline water electrolyzer with low requirements on manufacturing and assembly precision and high electrolysis efficiency is a technical problem that needs to be solved. Utility Model Content
[0005] The purpose of the utility model is to provide an alkaline water electrolytic cell in order to overcome the defects of the prior art in that the manufacturing and assembly precision are high and the electrolysis efficiency is low.
[0006] The purpose of the utility model can be achieved through the following technical solutions:
[0007] According to one aspect of the utility model, an alkaline water electrolyzer is provided, comprising a pole frame, a bipolar plate, an anode rib, an elastic component, an anode mesh and a cathode mesh, wherein the bipolar plate is welded to the pole frame, the anode rib is mounted on one side of the bipolar plate, the elastic component comprises a plurality of elastic components of a "J"-shaped structure, the opening side of the elastic component is mounted on the other side of the bipolar plate, the cathode mesh is mounted on the side opposite to the opening, and the anode mesh is fixed on the anode rib.
[0008] As a preferred technical solution, the side of the elastic component on which the cathode mesh is mounted is an elastic surface, on which a plurality of U-shaped cuts are arranged, and the U-shaped slices formed by the U-shaped cuts are bent into elastic sheets; and flow channel holes are provided on the two surfaces adjacent to the elastic surface.
[0009] As a preferred technical solution, the multiple U-shaped incisions include a first incision and a second incision, the incision directions of the first incision and the second incision differ by 180° and are arranged alternately in sequence; and punching holes are provided at the roots of the first incision and the second incision.
[0010] As a preferred technical solution, the elastic sheets bent by the first incision and the second incision are arranged in a cross shape.
[0011] As a preferred technical solution, the width of the elastic sheet at one end close to the elastic surface is greater than that at the end away from the elastic surface; the end of the elastic sheet away from the elastic surface is provided with a rounded bend, and one side of the elastic sheet is provided with a reinforcing rib.
[0012] As a preferred technical solution, a welded nickel sheet is fixed on the anode rib, and the anode mesh is welded to the anode rib by fixing the nickel sheet.
[0013] As a preferred technical solution, the bipolar plates, anode ribs and elastic components are provided with connection holes.
[0014] As a preferred technical solution, the electrolytic cell also includes a folding component, which is pressed on the side of the elastic component close to the pole frame and the distance between the elastic component and the pole frame is 3-7 mm. The cathode mesh is bent all around and buckled on the folding component.
[0015] As a preferred technical solution, the pole frame is made of carbon steel or 310s stainless steel or 304 stainless steel; the bipolar plate is made of pure nickel or nickel-plated carbon steel or 310s stainless steel or 304 stainless steel; the anode ribs are made of nickel-plated carbon steel or 310s stainless steel.
[0016] As a preferred technical solution, both sides of the bipolar plate are provided with a feed port and a discharge port, and one side of the discharge port is a slope; and an anti-corrosion electrode is provided in the discharge port of the anode of the bipolar plate.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] 1) The utility model uses elastic components on the cathode side of the bipolar plate to absorb system pressure fluctuations and assembly tolerances, reduce the requirements for manufacturing and assembly accuracy, and better protect the diaphragm from damage. It is suitable for high-performance composite diaphragms, and then matched with high-performance electrodes, improves operating current density, and reduces power consumption;
[0019] 2) The elastic sheets of the utility model are arranged in a cross shape, the width of the end of the elastic sheet close to the elastic surface is greater than the width of the end away from the elastic surface, and a reinforcing rib is provided on one side of the elastic sheet to ensure a good rebound effect;
[0020] 3) The first and second incisions of the utility model are provided with punching holes at their roots, which can increase the bending points of the elastic sheet, facilitate the adjustment of the length of the elastic sheet, and further adjust the elasticity of the elastic component and the distance between the elastic component and the cathode grid, thereby improving the performance of the electrolytic cell;
[0021] 4) The elastic component of the utility model has a strong rebound ability, creates a membrane pole distance structure, and reduces electrolysis energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a cross-sectional view of an alkaline water electrolysis cell of the utility model;
[0023] Figure 2 This is a schematic diagram of the cathode structure of an alkaline water electrolysis cell of the utility model;
[0024] Figure 3 This is a schematic diagram of the overall structure of the elastic component of the utility model;
[0025] Figure 4 This is the front view of the elastic component of the utility model;
[0026] Figure 5 This is a side view of the elastic component of the utility model;
[0027] Figure 6 This is a schematic diagram of the structure of the anode ribs with welded nickel sheets fixed thereto according to the utility model;
[0028] The numbers in the figure show:
[0029] 1. Pole frame, 2. Bipolar plate, 20. Feed inlet, 21. Discharge outlet, 3. Anode rib, 30. Welded nickel sheet, 4. Elastic component, 40. Elastic component, 400. Elastic surface, 401. Elastic sheet, 4010. Rounded corner bend, 4011. Reinforcing rib, 402. First incision, 403. Second incision, 404. Stamping hole, 410. Flow channel hole, 5. Anode mesh, 6. Cathode mesh, 7. Connection hole, 8. Folding component. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0031] Example 1
[0032] This embodiment provides an alkaline water electrolysis cell, including a pole frame 1, a bipolar plate 2, an anode rib 3, an elastic component 4, an anode mesh 5, a cathode mesh 6 and a folding component 8.
[0033] The pole frame 1 is made of 310s stainless steel, which is fully welded with the bipolar plate 2 to form the basic structure of the electrolytic cell bipolar plate 2. The anode rib 3 is welded on one side of the bipolar plate 2, and the elastic component 4 is welded on the other side; the anode mesh 5 is welded on the anode rib 3, and the folding component 8 is a two-fold three-section structure as a whole. The two sections on both sides are parallel to each other but bent in opposite directions. The middle section is perpendicular to the two sections on both sides, and the height is the same as the elastic component 4. It is pressed on the side of the elastic component 4 close to the pole frame 1 and the distance between the pole frame 1 is 3 to 7 mm. The cathode mesh 6 is laid on the elastic component 4, bent around, and buckled on the folding component 8 for fixing the cathode mesh 6. The bipolar plate 2 is made of 310s stainless steel. The anode rib 3 is made of 310s stainless steel.
[0034] The elastic component 4 includes multiple elastic components 40 of "J"-shaped structure. The elastic component 40 uses a nickel substrate of 0.05-0.2 mm, and is processed by cutting, stamping, acupuncture and other processes to form a U-shaped incision and a punching hole 404, and is bent into a "J"-shaped structure, an elastic sheet 401 and a rounded bend 4010.
[0035] The elastic component 40 can be connected to the bipolar plate 2 by welding methods such as argon arc welding and laser welding. The opening side of the elastic component 40 is installed on the bipolar plate 2, and the side opposite to the opening is an elastic surface 400, and the cathode mesh 6 is laid on the elastic surface 400. A plurality of U-shaped cutouts are provided on the elastic surface 400, and the U-shaped slices cut out by the U-shaped cutouts are bent into elastic sheets 401, the U-shaped cutouts include a first cutout 402 and a second cutout 403, the cutout directions of the first cutout 402 and the second cutout 403 differ by 180°, and are arranged in turn parallel to the extension direction of the elastic component 40, the elastic sheet 401 formed by the first cutout 402 and the second cutout 403 is in a cross shape, the width of the end of the elastic sheet 401 close to the elastic surface 400 is greater than the width of the end away from the elastic surface 400, so as to ensure a good rebound effect, a rounded bend 4010 is provided at the end of the elastic sheet 401 away from the elastic surface 400, and the rounded bend 4010 is slightly higher than the pole frame 1, and a reinforcing rib 4011 is provided on one side of the elastic sheet 401; a punching hole 404 is provided at the root of the first cutout 402 and the second cutout 403, and the punching hole 404 is elongated to increase the bending point of the elastic sheet 401. Flow channel holes 410 are formed on two surfaces adjacent to the elastic surface 400 .
[0036] A feed inlet 20 and a discharge outlet 21 are provided on both sides of the bipolar plate 2 , and one side of the discharge outlet 21 is a slope.
[0037] Example 2
[0038] This embodiment provides an alkaline water electrolysis cell, including a pole frame 1, a bipolar plate 2, an anode rib 3, an elastic component 4, an anode mesh 5, a cathode mesh 6 and a folding component 8.
[0039] The pole frame 1 is made of carbon steel and is fully welded with the bipolar plate 2 to form the basic structure of the bipolar plate 2 of the electrolytic cell. The anode rib 3 is installed on one side of the bipolar plate 2, and the elastic component 4 is installed on the other side. The bipolar plate 2, the anode rib 3 and the elastic component 4 are provided with connection holes 7, and the above three components are riveted and fixed through the connection holes 7. The anode mesh 5 is welded on the anode rib 3, and the folding component 8 is a two-fold three-section structure as a whole. The two sections on both sides are parallel to each other but bent in opposite directions. The middle section is perpendicular to the two sections on both sides, and the height is the same as the elastic component 4. It is pressed on the side of the elastic component 4 close to the pole frame 1 and the distance between the pole frame 1 is 3 to 7 mm. The cathode mesh 6 is laid on the elastic component 4, bent around, and buckled on the folding component 8 for fixing the cathode mesh 6. The bipolar plate 2 is made of nickel-plated carbon steel with a coating thickness of 40 to 100 μm. The anode rib 3 is made of carbon steel nickel-plated material with a coating thickness of 40 to 100 μm.
[0040] The elastic component 4 includes multiple elastic components 40 of "J"-shaped structure. The elastic component 40 uses a nickel substrate of 0.05-0.2 mm, and is processed by cutting, stamping, acupuncture and other processes to form a U-shaped incision and a punching hole 404, and is bent into a "J"-shaped structure, an elastic sheet 401 and a rounded bend 4010.
[0041] The elastic component 40 can be connected to the bipolar plate 2 by fasteners or the like. The opening side of the elastic component 40 is mounted on the bipolar plate 2, and the side opposite to the opening is an elastic surface 400, on which the cathode mesh 6 is laid. A plurality of U-shaped cutouts are provided on the elastic surface 400, and the U-shaped slices cut out by the U-shaped cutouts are bent into elastic sheets 401, the U-shaped cutouts include a first cutout 402 and a second cutout 403, the cutout directions of the first cutout 402 and the second cutout 403 differ by 180°, and are arranged in turn parallel to the extension direction of the elastic component 40, the elastic sheet 401 formed by the first cutout 402 and the second cutout 403 is in a cross shape, the width of the end of the elastic sheet 401 close to the elastic surface 400 is greater than the width of the end away from the elastic surface 400, so as to ensure a good rebound effect, a rounded bend 4010 is provided at the end of the elastic sheet 401 away from the elastic surface 400, and the rounded bend 4010 is slightly higher than the pole frame 1, and a reinforcing rib 4011 is provided on one side of the elastic sheet 401; a punching hole 404 is provided at the root of the first cutout 402 and the second cutout 403, and the punching hole 404 is elongated to increase the bending point of the elastic sheet 401. Flow channel holes 410 are formed on two surfaces adjacent to the elastic surface 400 .
[0042] A feed inlet 20 and a discharge outlet 21 are provided on both sides of the bipolar plate 2 , and one side of the discharge outlet 21 is a slope.
[0043] Example 3
[0044] This embodiment provides an alkaline water electrolysis cell, including a pole frame 1, a bipolar plate 2, an anode rib 3, an elastic component 4, an anode mesh 5, a cathode mesh 6 and a folding component 8.
[0045] The pole frame 1 is made of carbon steel and is fully welded with the bipolar plate 2 to form the basic structure of the electrolytic cell bipolar plate 2. The anode rib 3 is welded on one side of the bipolar plate 2, and the elastic component 4 is welded on the other side; the nickel sheet is fixed on the anode rib 3 by riveting, and the anode mesh 5 is welded on the nickel sheet of the anode rib 3. The folding component 8 is a two-fold three-section structure as a whole. The two sections on both sides are parallel to each other but bent in opposite directions. The middle section is perpendicular to the two sections on both sides, and the height is the same as the elastic component 4. It is pressed on the side of the elastic component 4 close to the pole frame 1 and the distance between the pole frame 1 is 3 to 7 mm. The cathode mesh 6 is laid on the elastic component 4, bent around, and buckled on the folding component 8 for fixing the cathode mesh 6. The bipolar plate 2 is made of nickel-plated carbon steel with a coating thickness of 40 to 100 μm. The anode rib 3 is made of carbon steel nickel-plated material with a coating thickness of 40 to 100 μm.
[0046] The elastic component 4 includes multiple elastic components 40 of "J"-shaped structure. The elastic component 40 uses a nickel substrate of 0.05-0.2 mm, and is processed by cutting, stamping, acupuncture and other processes to form a U-shaped incision and a punching hole 404, and is bent into a "J"-shaped structure, an elastic sheet 401 and a rounded bend 4010.
[0047] The elastic component 40 can be connected to the bipolar plate 2 by welding methods such as argon arc welding and laser welding. The opening side of the elastic component 40 is installed on the bipolar plate 2, and the side opposite to the opening is an elastic surface 400, and the cathode mesh 6 is laid on the elastic surface 400. A plurality of U-shaped cutouts are provided on the elastic surface 400, and the U-shaped slices cut out by the U-shaped cutouts are bent into elastic sheets 401, the U-shaped cutouts include a first cutout 402 and a second cutout 403, the cutout directions of the first cutout 402 and the second cutout 403 differ by 180°, and are arranged in turn parallel to the extension direction of the elastic component 40, the elastic sheet 401 formed by the first cutout 402 and the second cutout 403 is in a cross shape, the width of the end of the elastic sheet 401 close to the elastic surface 400 is greater than the width of the end away from the elastic surface 400, so as to ensure a good rebound effect, a rounded bend 4010 is provided at the end of the elastic sheet 401 away from the elastic surface 400, and the rounded bend 4010 is slightly higher than the pole frame 1, and a reinforcing rib 4011 is provided on one side of the elastic sheet 401; a punching hole 404 is provided at the root of the first cutout 402 and the second cutout 403, and the punching hole 404 is elongated to increase the bending point of the elastic sheet 401. Flow channel holes 410 are formed on two surfaces adjacent to the elastic surface 400 .
[0048] A feed inlet 20 and a discharge outlet 21 are provided on both sides of the bipolar plate 2 , and one side of the discharge outlet 21 is a slope.
[0049] The electrolysis voltage and energy consumption corresponding to Example 1, Example 2 and Example 3 are shown in Table 1:
[0050] Example 1 Example 2 Example 3 Average voltage(V) 1.941 1.919 1.923 <![CDATA[Power consumption (KWh / Nm 3 )]]> 4.638 4.586 4.596
[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An alkaline water electrolyzer, characterized in that: The invention comprises a pole frame (1), a bipolar plate (2), an anode rib (3), an elastic component (4), an anode mesh (5) and a cathode mesh (6); the bipolar plate (2) is welded to the pole frame (1); the anode rib (3) is mounted on one side of the bipolar plate (2); the elastic component (4) comprises a plurality of elastic components (40) with a "J"-shaped structure; the elastic component (40) has an opening on one side mounted on the other side of the bipolar plate (2); the cathode mesh (6) is mounted on the side opposite to the opening; and the anode mesh (5) is fixed on the anode rib (3).
2. An alkaline water electrolyzer according to claim 1, characterized in that: The side of the elastic component (40) on which the cathode mesh (6) is mounted is an elastic surface (400), and a plurality of U-shaped cutouts are provided on the elastic surface (400). The U-shaped slices formed by the U-shaped cutouts are bent into elastic slices (401); and flow channel holes (410) are provided on the two surfaces adjacent to the elastic surface (400).
3. An alkaline water electrolyzer according to claim 2, characterized in that: The multiple U-shaped cuts include a first cut (402) and a second cut (403); the cut directions of the first cut (402) and the second cut (403) differ by 180° and are arranged alternately in sequence; and punching holes (404) are provided at the roots of the first cut (402) and the second cut (403).
4. An alkaline water electrolyzer according to claim 3, characterized in that: The elastic sheets (401) bent by the first incision (402) and the second incision (403) are arranged in a cross shape.
5. An alkaline water electrolysis cell according to claim 2, characterized in that: The width of the end of the elastic sheet (401) close to the elastic surface (400) is greater than that of the end away from the elastic surface (400); the end of the elastic sheet (401) away from the elastic surface (400) is provided with a rounded bend (4010), and one side of the elastic sheet (401) is provided with a reinforcing rib (4011).
6. An alkaline water electrolysis cell according to claim 1, characterized in that: A welding nickel sheet (30) is fixed on the anode rib (3), and the anode mesh (5) is welded to the anode rib (3) by fixing the nickel sheet.
7. An alkaline water electrolysis cell according to claim 1, characterized in that: The bipolar plate (2), the anode rib (3) and the elastic component (4) are provided with connection holes (7).
8. An alkaline water electrolysis cell according to claim 1, characterized in that: The electrolytic cell further comprises a folding component (8), wherein the folding component (8) is pressed on a side of the elastic component (4) close to the pole frame (1) and the distance between the folding component and the pole frame (1) is 3 to 7 mm, and the cathode mesh (6) is folded around and buckled on the folding component (8).
9. The alkaline water electrolysis cell according to claim 1, characterized in that: The pole frame (1) is a pole frame (1) made of carbon steel or 310s stainless steel or 304 stainless steel; the bipolar plate (2) is a bipolar plate (2) made of pure nickel or nickel-plated carbon steel or 310s stainless steel or 304 stainless steel; the anode rib (3) is anode rib (3) made of nickel-plated carbon steel or 310s stainless steel.
10. The alkaline water electrolysis cell according to claim 1, characterized in that: Both sides of the bipolar plate (2) are provided with a feed port (20) and a discharge port (21), and one side of the discharge port (21) is a slope; an anti-corrosion electrode is provided inside the discharge port (21) of the anode of the bipolar plate (2).