Alkaline electrolytic cell metal bipolar plate supporting structure

Abstract

The utility model discloses a metal bipolar plate supporting structure of an alkaline electrolytic bath. The metal bipolar plate supporting structure comprises a first polar plate, a second polar plate, a positive electrode, a negative electrode and a diaphragm, the first polar plate comprises a first polar frame, a first main polar plate fixedly connected with the first polar frame and a plurality of first mastoids arranged on one side of the first main polar plate; the second pole plate comprises a second pole frame, a second main pole plate fixedly connected with the second pole frame and a plurality of second mastoids arranged on one side of the second main pole plate, and the first pole frame is provided with a first step used for placing a diaphragm, a second step used for placing a positive electrode and a third step used for placing an elastic supporting net; the positive electrode and the negative electrode abut against the two sides of the diaphragm respectively, the side, away from the diaphragm, of the negative electrode abuts against the second mastoid process, and the side, away from the diaphragm, of the positive electrode is supported by the elastic supporting net. The utility model has the advantages of higher current density and lower energy consumption. The damage probability of the diaphragm, the positive electrode and the negative electrode is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolysis, in particular to a metal bipolar plate support structure for an alkaline electrolytic cell. Background Art

[0002] During the electrolysis process, the electrolyte will generate gas to form a gas-liquid mixture. So far, the existing metal-structured electrolytic cells on the market usually adopt two forms: a bipolar plate with a bidirectional papilla support structure and a bipolar plate with a flat structure plus a rigid metal stretching mesh support structure. Both mechanical structures are hard support structures. The ideal state of each component inside the working electrolytic cell is zero contact to ensure that the conductivity of the cell body is high enough and the resistivity is low enough to increase the current density of the electrolytic cell and reduce energy consumption. However, due to the limitation of the processing technology level, it is difficult to control the tolerance of large-sized bipolar plates within a reasonable range, resulting in overpressure and damage to components such as the diaphragm electrode in some places during the assembly process, and non-contact in some places, resulting in excessive resistance and increased energy consumption under working conditions.

[0003] In view of this, it is necessary to provide a metal bipolar plate support structure for an alkaline electrolytic cell. Summary of the Invention

[0004] The metal bipolar plate support structure for an alkaline electrolytic cell provided by the utility model effectively solves the problems that the existing electrolytic cell support structure is prone to damage the diaphragm and electrodes and has excessive resistance and increased energy consumption during actual use.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A metal bipolar plate support structure for an alkaline electrolytic cell includes a first bipolar plate, a second bipolar plate, a positive electrode, a negative electrode, and a diaphragm. It also includes an elastic support mesh. The first bipolar plate includes a first bipolar frame, a first main bipolar plate fixedly connected to the first bipolar frame, and a plurality of first papillae arranged on one side of the first main bipolar plate. The second bipolar plate includes a second bipolar frame, a second main bipolar plate fixedly connected to the second bipolar frame, and a plurality of second papillae arranged on one side of the second main bipolar plate. A first step for placing the diaphragm, a second step for placing the positive electrode, and a third step for placing the elastic support mesh are provided on the first bipolar frame. The positive electrode and the negative electrode respectively abut against both sides of the diaphragm. The side of the negative electrode away from the diaphragm abuts against the second papillae, and the side of the positive electrode away from the diaphragm is supported by the elastic support mesh.

[0007] Furthermore: The first papillae and the second papillae have the same structure, and the end of the first papilla is a plane.

[0008] Furthermore: A backing plate is also provided between the first bipolar frame and the second bipolar frame, and the backing plate is concentric with the first bipolar frame and the second bipolar frame.

[0009] Furthermore, the first mastoid and the second mastoid correspond to each other one by one.

[0010] Furthermore, all the first mastoids can be projected onto the elastic support net.

[0011] Advantages of the utility model: Both the first main plate and the second main plate are provided with mastoids on one side. Compared with the double-sided mastoid structure under the same specifications and parameters, the number of mastoids per unit area in this application is doubled, resulting in a higher current density and lower energy consumption. The use of an elastic support net for support can effectively meet the requirement of zero contact between components and reduce the probability of damage to the diaphragm, positive electrode, and negative electrode. Description of the drawings

[0012] Figure 1 It is an exploded schematic view of the metal bipolar plate support structure of the alkaline electrolytic cell provided by the embodiment of the present application.

[0013] Figure 2 It is an overall schematic view of the metal bipolar plate support structure of the alkaline electrolytic cell provided by the embodiment of the present application.

[0014] Figure 3 It is a cross-sectional view of the metal bipolar plate support structure of the alkaline electrolytic cell provided by the embodiment of the present application.

[0015] Figure 4 It is a schematic view of one perspective of the first plate of the metal bipolar plate support structure of the alkaline electrolytic cell provided by the embodiment of the present application.

[0016] Figure 5 It is a schematic view of another perspective of the first plate of the metal bipolar plate support structure of the alkaline electrolytic cell provided by the embodiment of the present application.

[0017] The labels in the figure are: 1, first plate; 2, second plate; 3, positive electrode; 4, negative electrode; 5, diaphragm; 6, elastic support net; 11, first pole frame; 12, first main plate; 13, first mastoid; 21, second pole frame; 22, second main plate; 23, second mastoid; 101, first step; 102, second step; 103, third step; 7, backing plate. Detailed implementation manners

[0018] To make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given in conjunction with the accompanying drawings.

[0019] Such as Figure 1 、 Figure 2 And Figure 3As shown in the figure, an embodiment of the present application is a metal bipolar plate support structure for an alkaline electrolytic cell, and its structure includes a first bipolar plate 1, a second bipolar plate 2, a positive electrode 3, a negative electrode 4, and a diaphragm 5. It further includes an elastic support mesh 6. The first bipolar plate 1 includes a first bipolar frame 11, a first main bipolar plate 12 fixedly connected to the first bipolar frame 11, and a plurality of first papillae 13 provided on one side of the first main bipolar plate 12. The second bipolar plate 2 includes a second bipolar frame 21, a second main bipolar plate 22 fixedly connected to the second bipolar frame 21, and a plurality of second papillae 23 provided on one side of the second main bipolar plate 22. As Figure 4 and Figure 5 shown, a first step 101 for placing the diaphragm 5, a second step 102 for placing the positive electrode 3, and a third step 103 for placing the elastic support mesh 6 are provided on the first bipolar frame 11. The positive electrode 3 and the negative electrode 4 are respectively abutted against both sides of the diaphragm 5. The side of the negative electrode 4 away from the diaphragm 5 is abutted against the second papillae 23, and the side of the positive electrode 3 away from the diaphragm 5 is supported by the elastic support mesh 6.

[0020] It should be noted that the papillae are formed by stamping. One side of the papillae is convex and the other side is concave (as Figure 4 ), so the papillae on both sides of the existing bipolar plates are arranged staggeredly.

[0021] During actual use, the positive electrode 3 is supported by the elastic support mesh 6, and the negative electrode 4 is supported by the second papillae 23.

[0022] In the above design, both the first main bipolar plate 12 and the second main bipolar plate 22 are provided with papillae on one side. Compared with the double-sided papillae structure under the same specifications and parameters, the number of papillae per unit area of the present application is twice as much, resulting in a higher current density and lower energy consumption. Using the elastic support mesh 6 for support can effectively meet the requirement of zero contact between components and reduce the probability of damage to the diaphragm 5, the positive electrode 3, and the negative electrode 4.

[0023] Specifically: As Figure 3 and Figure 5 shown, the first papillae 13 and the second papillae 23 have the same structure, and the end of the first papillae 13 is a plane.

[0024] In the above design, setting the end faces of the first papillae 13 and the second papillae 23 as planes has a larger contact area compared with the traditional papillae with an overall arc surface, and it is easier to control the height tolerance of the papillae.

[0025] Specifically: As Figure 1 and Figure 3 shown, a backing plate 7 is further provided between the first bipolar frame 11 and the second bipolar frame 21, and the backing plate 7 is concentric with the first bipolar frame 11 and the second bipolar frame 21.

[0026] In actual use, the first pole frame 11 and the second pole frame 21 are isolated by the backing plate 7, which can ensure the stability between the first pole frame 11 and the second pole frame 21.

[0027] Specifically: as Figure 3 shown, the first papilla 13 and the second papilla 23 correspond to each other one by one.

[0028] In actual use, by corresponding the first papilla 13 and the second papilla 23, it can ensure that the positive electrode 3, the negative electrode 4 and the separator 5 located between the first electrode plate 1 and the second electrode plate 2 receive the same force from the directions of the first papilla 13 and the second papilla 23, and the directions of the forces correspond to each other.

[0029] In the above design, the design of the first papilla 13 and the second papilla 23 helps to ensure the stable force among the positive electrode 3, the negative electrode 4 and the separator 5.

[0030] Specifically: as Figure 1 and Figure 3 shown, all the first papillae 13 can be projected onto the elastic support net 6.

[0031] In actual use, the elastic support net 6 supports the positive electrode 3, and the positive electrode 3 corresponds to the negative electrode 4. While the elastic support net 6 supports the positive electrode 3, it can transmit an elastic force to the separator 5 through the positive electrode 3 and support the negative electrode 4 synchronously.

[0032] In the above design, the structural design and the specific implementation manner of the elastic support net 6 can effectively achieve the elastic support for the negative electrode 4 and the positive electrode 3.

[0033] For further detailed description, it should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A metal bipolar plate support structure for an alkaline electrolytic cell, comprising a first plate (1), a second plate (2), a positive electrode (3), a negative electrode (4) and a diaphragm (5), characterized in that: It further includes an elastic support net (6). The first electrode plate (1) includes a first electrode frame (11), a first main electrode plate (12) fixedly connected to the first electrode frame (11), and a plurality of first papillae (13) arranged on one side of the first main electrode plate (12). The second electrode plate (2) includes a second electrode frame (21), a second main electrode plate (22) fixedly connected to the second electrode frame (21), and a plurality of second papillae (23) arranged on one side of the second main electrode plate (22). A first step (101) for placing a separator (5), a second step (102) for placing a positive electrode (3), and a third step (103) for placing the elastic support net (6) are provided on the first electrode frame (11). The positive electrode (3) and the negative electrode (4) are respectively abutted against both sides of the separator (5). The side of the negative electrode (4) away from the separator (5) is abutted against the second papilla (23), and the side of the positive electrode (3) away from the separator (5) is supported by the elastic support net (6).

2. The metal bipolar plate support structure of the alkaline electrolyzer according to claim 1, wherein: The first papilla (13) and the second papilla (23) have the same structure, and the end of the first papilla (13) is a plane.

3. The metal bipolar plate support structure of the alkaline electrolyzer according to claim 1, wherein: A backing plate (7) is further provided between the first electrode frame (11) and the second electrode frame (21), and the backing plate (7) is concentric with the first electrode frame (11) and the second electrode frame (21).

4. The metal bipolar plate support structure of the alkaline electrolytic cell according to claim 1, wherein: The first papillae (13) and the second papillae (23) are in one-to-one correspondence.

5. The metal bipolar plate support structure of the alkaline electrolyzer according to claim 1, characterized in that: All the first papillae (13) can be projected onto the elastic support net (6).

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