Bipolar plate sealing structure, electrolytic bath and hydrogen production system

Abstract

The utility model belongs to the technical field of electrolytic hydrogen production, and particularly discloses a bipolar plate sealing structure, an electrolytic bath and a hydrogen production system. The bipolar plate sealing structure comprises bipolar plates, sealing washers, sealing protruding blocks and sealing grooves, the sealing washers, the sealing protruding blocks and the sealing grooves are arranged between the bipolar plates, the sealing protruding blocks are connected with the sealing washers, the sealing grooves are connected with the bipolar plates, and each sealing protruding block comprises a sealing protruding block top and a sealing protruding block body. The sealing convex block top and the sealing convex block body part are integrally formed, the sealing groove comprises a sealing groove inner cavity and a sealing lug part, and the sealing lug part is located at an opening of the sealing groove inner cavity and integrally formed with the sealing groove. According to the bipolar plate sealing structure disclosed by the utility model, a good sealing effect is realized through the sealing contact surface at the top of the sealing lug, the sealing contact surface at the waist part of the sealing lug and the sealing contact surface at the body part of the sealing lug.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrolytic hydrogen production, and in particular relates to a bipolar plate sealing structure, an electrolytic cell and a hydrogen production system. Background Art

[0002] Pressure-type alkaline electrolyzers typically operate under a certain pressure. The fluid flow inside the cell consists of a circulating electrolyte and generated hydrogen and oxygen. The purpose of the seal is to prevent leakage of the electrolyte solution, hydrogen, and oxygen from the cell under certain operating conditions, including a 30% KOH solution and a certain temperature and pressure. Typically, this is achieved by creating a sealing line around the edge of the plate frame and modifying the gasket material to ensure the integrity of the entire cell. Existing sealing methods for pressure-type alkaline electrolyzers result in small gaps between contact surfaces, which can easily lead to gas and liquid leakage, resulting in poor sealing effectiveness. Utility Model Content

[0003] In view of the deficiencies of the prior art, the main purpose of the present invention is to provide a bipolar plate sealing structure, which achieves a good sealing effect by increasing the sealing contact surface and increasing the pre-tightening force of the stack.

[0004] In order to achieve the above sealing purpose, the present invention provides the following technical solutions: a bipolar plate sealing structure, comprising: bipolar plates and sealing gaskets arranged between the bipolar plates,

[0005] The bipolar plate sealing structure further includes: a sealing protrusion and a sealing groove, wherein the sealing protrusion is connected to the sealing gasket, and the sealing groove is connected to the bipolar plate.

[0006] The sealing bump includes: a sealing bump top and a sealing bump body, wherein the sealing bump top and the sealing bump body are integrally formed.

[0007] The sealing groove includes: a sealing groove inner cavity, and the bipolar plate sealing structure also includes a sealing ear portion, which is arranged on the sealing protrusion or the sealing groove.

[0008] Furthermore, the sealing bump further comprises: a sealing bump waist portion, which is a concave structure and is located between the sealing bump top portion and the sealing bump body portion.

[0009] Furthermore, the sealing ear is an arc-shaped protrusion or a pointed-angled protrusion.

[0010] Furthermore, the sealing ear is located at the inner opening of the sealing groove and is integrally formed with the sealing groove.

[0011] Furthermore, the bipolar plate is provided with a plate groove, and the sealing groove is tightly bonded and embedded in the plate groove of the bipolar plate by gluing, thereby forming a whole with the bipolar plate.

[0012] Furthermore, the sealing protrusion can be integrally formed with the sealing gasket.

[0013] Furthermore, a sealing positioning structure is provided between the bipolar plate and the sealing gasket.

[0014] An electrolytic cell comprises the bipolar plate sealing structure according to the utility model.

[0015] A hydrogen production system is characterized by comprising the bipolar plate sealing structure described in the utility model or the electrolyzer described in the utility model.

[0016] Compared with the prior art, the present invention provides a bipolar plate sealing structure with the following beneficial effects:

[0017] The bipolar plate sealing structure of the utility model achieves a good sealing effect through the sealing contact surface on the top of the sealing protrusion, the sealing contact surface on the waist of the sealing protrusion and the sealing contact surface on the body of the sealing protrusion.

[0018] The bipolar plate sealing structure of the present invention can increase the pre-tightening force of the stacking of the sealing protrusion waist during sealing through the special design of the sealing ear and the sealing protrusion waist, thereby achieving a good sealing effect.

[0019] The bipolar plate sealing structure of the present invention can not only play a positioning function but also a sealing function through the design of the sealing positioning structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the sealing bump and sealing groove of the sealing structure;

[0021] Figure 2 Optimize the structural diagram for the sealing structure;

[0022] Figure 3 This is a diagram showing the integrated molding of the sealing bump and the sealing gasket;

[0023] Figure 4 Structural diagram of the sealing structure when it is sealed;

[0024] Figure 5 This is the installation position diagram of the sealing structure.

[0025] In the figure: 1. Sealing bump; 2. Top of sealing bump; 3. Waist of sealing bump; 4. Body of sealing bump; 5. Sealing gasket; 6. Sealing groove; 7. Inner cavity of sealing groove; 8. Sealing ear; 9. Plate groove; 10. Bipolar plate; 11. Mastoid plate; 12. Electrode; 13. Diaphragm; 14. Electrolysis chamber; 15. Sealing structure; 16. Sealing positioning structure; 17. Positioning groove; 18. Positioning protrusion. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The utility model provides a technical solution:

[0028] Example 1

[0029] See also Figure 1 A bipolar plate sealing structure includes a sealing protrusion 1 and a sealing groove 6, wherein the sealing protrusion 1 is connected to the sealing gasket 5, and the sealing groove 6 is connected to the bipolar plate 10.

[0030] The sealing bump 1 includes: a sealing bump top 2 and a sealing bump body 4, wherein the sealing bump top 2 and the sealing bump body 4 are integrally formed.

[0031] The sealing groove 6 includes: a sealing groove inner cavity 7, and the bipolar plate sealing structure also includes a sealing ear 8, which is located on the sealing protrusion 1 or the sealing groove 6.

[0032] Furthermore, the sealing ear portion 8 is located at the opening of the sealing groove inner cavity 7 and is integrally formed with the sealing groove 6 .

[0033] During sealing, the top 2 of the sealing protrusion enters the sealing groove inner cavity 7 of the sealing groove 6, and the sealing protrusion 1 is squeezed and filled in the sealing groove inner cavity 7. The top 2 of the sealing protrusion fits tightly against the inner wall of the sealing groove inner cavity 7, and the sealing ear 8 is squeezed against the wall of the sealing protrusion 2, thereby achieving a sealing effect.

[0034] As a preferred embodiment, the sealing protrusion 1 is embedded in the sealing gasket 5. Specifically, the sealing gasket 5 is processed into a groove structure. The sealing protrusion body 4 of the sealing protrusion 1 can be tightly bonded to the groove structure of the sealing gasket 5 by gluing, forming a whole with the sealing gasket 5.

[0035] As a preferred embodiment, the sealing protrusion 1 and the sealing gasket 5 can be integrally formed into a whole.

[0036] As a preferred embodiment, the sealing groove 6 can be integral with the bipolar plate 10 .

[0037] As a preferred embodiment, the sealing groove 6 is embedded in the bipolar plate 10. Specifically, a plate groove 9 is opened, and the sealing groove 6 is tightly bonded to the plate groove 9 of the bipolar plate 10 by gluing, forming a whole with the bipolar plate 10.

[0038] Example 2

[0039] See also Figure 2 、 Figure 3 as well as Figure 4 , which is different from Example 1, the sealing bump 1 further includes: a sealing bump waist 3, which is a concave structure and is located between the sealing bump top 2 and the sealing bump body 4,

[0040] During sealing, the top 2 of the sealing protrusion enters the sealing groove inner cavity 7 of the sealing groove 6, and the sealing ear 8 is filled in the concave structure of the sealing protrusion waist 3. The sealing ear 8 is squeezed and fits tightly with the wall surface of the sealing protrusion waist 3. The sealing protrusion 1 is filled in the sealing groove inner cavity 7, and the top 2 of the sealing protrusion is squeezed and fits tightly with the inner wall surface of the sealing groove inner cavity 7, thereby achieving a sealing effect.

[0041] As a preferred embodiment, the sealing ear portion 8 is an arc-shaped protrusion.

[0042] As a preferred embodiment, the sealing ear portion 8 is a protrusion that is narrow at the top and wide at the bottom. Preferably, the sealing ear portion 8 is a pointed protrusion.

[0043] During sealing, the top 2 of the sealing protrusion enters the sealing groove inner cavity 7 of the sealing groove 6, and the sealing ear 8 rolls inward and fills the concave structure of the sealing protrusion waist 3. The restoring force formed by the inward rolling of the sealing ear 8 causes the sealing ear 8 to be squeezed and fit tightly with the wall surface of the sealing protrusion waist 3, thereby achieving a sealing effect.

[0044] Example 3

[0045] See also Figure 5 This embodiment is an embodiment of the installation method of the bipolar plate sealing structure 15 and the electrolytic cell. A single electrolytic cell of the electrolytic cell includes: a bipolar plate 10, a mastoid plate 11, an electrode 12, a diaphragm 13, and an electrolysis chamber 14. A sealing gasket 5 is placed between the two bipolar plates 10, the sealing protrusion 1 is connected to the sealing gasket 5, and the sealing groove 6 is connected to the bipolar plate 10.

[0046] As a preferred embodiment, the sealing protrusion 1 is embedded in the sealing gasket 5. Specifically, the sealing gasket 5 is processed into a groove structure. The sealing protrusion body 4 of the sealing protrusion 1 can be tightly bonded to the groove structure of the sealing gasket 5 by gluing, forming a whole with the sealing gasket 5.

[0047] As a preferred embodiment, the sealing protrusion 1 and the sealing gasket 5 can be integrally formed into a whole.

[0048] As a preferred embodiment, the sealing groove 6 can be integral with the bipolar plate 10 .

[0049] As a preferred embodiment, the sealing groove 6 is embedded in the bipolar plate 10. Specifically, a plate groove 9 is opened, and the sealing groove 6 is tightly bonded to the plate groove 9 of the bipolar plate 10 by gluing, forming a whole with the bipolar plate 10.

[0050] During sealing, the two bipolar plates 10 approach each other, and the top 2 of the sealing protrusion enters the sealing groove inner cavity 7 of the sealing groove 6, thereby achieving sealing.

[0051] Furthermore, in order to facilitate the sealing installation, a sealing positioning structure 16 can be established between the bipolar plate 10 and the sealing gasket 5. The sealing positioning structure 16 includes: a positioning groove 17 and a positioning protrusion 18; during positioning, the positioning protrusion 18 is inserted into the positioning groove 17, so that the sealing gasket 5 and the bipolar plate 10 are fixed in position.

[0052] As a preferred embodiment, the positioning protrusion 18 is located on the bipolar plate 10 and is made of the same material as the bipolar plate 10 and is integrally formed therewith. The positioning groove 17 is located on the sealing gasket 5 and is integrally formed therewith. During sealing, the positioning protrusion 18 is made of a hard material and is easily inserted into the positioning groove 17, thereby better achieving the positioning function. The sealing positioning structure 16 can also achieve a certain sealing function.

[0053] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0054] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bipolar plate sealing structure, characterized in that: include: Bipolar plates (10) and sealing gaskets (5) arranged between the bipolar plates (10), the bipolar plate sealing structure further comprising: a sealing protrusion (1) and a sealing groove (6), the sealing protrusion (1) being connected to the sealing gasket (5), the sealing groove (6) being connected to the bipolar plate (10), the sealing protrusion (1) comprising: a sealing protrusion top (2) and a sealing protrusion body (4), the sealing protrusion top (2) and the sealing protrusion body (4) being integrally formed, the sealing groove (6) comprising: a sealing groove inner cavity (7), the bipolar plate sealing structure further comprising a sealing ear (8), the sealing ear (8) being arranged on the sealing protrusion (1) or the sealing groove (6).

2. The bipolar plate sealing structure according to claim 1, characterized in that: The sealing protrusion (1) further comprises: a sealing protrusion waist (3); the sealing protrusion waist (3) is a concave structure and is located between the sealing protrusion top (2) and the sealing protrusion body (4).

3. The bipolar plate sealing structure according to claim 1, wherein: The sealing ear portion (8) is an arc-shaped protrusion or a pointed-angle protrusion.

4. The bipolar plate sealing structure according to claim 1, wherein: The sealing ear portion (8) is located at the opening of the sealing groove inner cavity (7) and is integrally formed with the sealing groove (6).

5. The bipolar plate sealing structure according to claim 1, characterized in that: The bipolar plate (10) is provided with a plate groove (9), and the sealing groove (6) is tightly bonded and embedded in the plate groove (9) of the bipolar plate (10) by gluing, thereby forming a whole with the bipolar plate (10).

6. The bipolar plate sealing structure according to claim 1, characterized in that: The sealing protrusion (1) can be integrally formed with the sealing gasket (5).

7. The bipolar plate sealing structure according to claim 1, characterized in that: A sealing positioning structure (16) is provided between the bipolar plate (10) and the sealing gasket (5).

8. An electrolytic cell, characterized in that: Comprising the bipolar plate sealing structure according to any one of claims 1 to 7.

9. A hydrogen production system, characterized in that: It comprises the bipolar plate sealing structure according to any one of claims 1 to 7, or the electrolytic cell according to claim 8.

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