CN217606857U - Composite sealing rubber wire structure of fuel cell - Google Patents

Abstract

The utility model provides a fuel cell composite sealing glue line structure, comprising a first sealing member and a second sealing member, wherein the hardness of the first sealing member is smaller than that of the second sealing member; the first sealing member is provided with a concave a groove, the second sealing member is fixed in the groove, the vertex of the second sealing member is flush with the vertex of the groove; the gas permeability of the material used for the first sealing member is lower than that of the Gas permeability of the material used for the second sealing member; a sealed space is formed between two sides of the second sealing member and the inner wall of the groove respectively. The technical scheme of the utility model has stronger anti-aging ability than the silicone sealing line, lower gas passing rate and better sealing performance.

Description

A fuel cell composite sealant line structure

technical field

The utility model relates to the field of fuel cell manufacturing, in particular, to a fuel cell composite sealant wire structure.

Background technique

Existing fuel cell sealant lines usually use silica gel line sealant lines with a larger amount of gas permeation among the sealing materials. Therefore, simply using silicone sealant lines when assembling fuel cells has a large gas permeation amount. Although composite seals have some applications in the field of fuel cell sealant lines, such as circular interface seals, such structures are relatively simple and have poor interface sealability. Therefore, a low permeability, good air tightness and durability Long composite sealant line construction.

Utility model content

According to the above technical problems of existing fuel cell sealant lines, a fuel cell composite sealant line structure is provided, which has stronger aging resistance than silicone sealant lines, lower gas passage rate, and better sealing performance.

The technical means adopted by the utility model are as follows:

A fuel cell composite sealing glue line structure includes a first sealing member and a second sealing member, the hardness of the first sealing member is smaller than the hardness of the second sealing member; the first sealing member is provided with a groove, the The second sealing member is fixed in the groove, and the vertex of the second sealing member is flush with the vertex of the groove; the gas permeability of the material used for the first sealing member is lower than that of the second sealing member The gas permeability of the material used; a sealed space is formed between the two sides of the second sealing member and the inner wall of the groove.

Further, the first sealing member is processed by a compression molding process.

Further, the second sealing member is formed by using a glue dispensing process to dispense glue into the groove and then form it naturally, and the surface of the second sealing member is arc-shaped.

Further, the hardness of the first sealing member is greater than or equal to 40 Shore, and less than or equal to 60 Shore, and the hardness of the second sealing member is greater than or equal to 50 Shore, and less than or equal to 70 Shore.

Further, the first sealing member is made of silicone rubber, and the second sealing member is made of fluororubber, EPDM or butyl rubber.

Further, the first sealing member is made of fluorine rubber, and the second sealing member is made of EPDM or butyl rubber.

Further, the first sealing member is made of butyl rubber, and the second sealing member is made of EPDM rubber.

Compared with the prior art, the utility model has the following advantages:

In the fuel cell composite sealing glue line structure provided by the utility model, the first sealing member is made of rubber material with lower hardness and poor gas barrier property, the second sealing member is made of rubber material with higher hardness and better gas barrier property, and the compression The permanent deformation is smaller and the aging resistance is better; the composite sealant line uses the first seal and the second seal to form two sealed cavities together, which has good sealing performance. One fuel cell composite sealant line has two The common advantages of materials and materials include lower gas permeability, better air tightness and aging resistance.

Based on the above reasons, the present invention can be widely promoted in the field of fuel cell manufacturing.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 is a schematic structural diagram of the sealing glue line according to the present invention.

In the figure: 1. MEA frame; 2. First sealing member; 3. Second sealing member; 4. Sealing space.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application or use in any way. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that the terminology used herein is for describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only and not limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. The orientation or positional relationship is usually based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and these orientations do not indicate and imply the indicated device unless otherwise stated. Or elements must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the present invention: the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under its device or structure". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood To limit the scope of protection of the present invention.

Example 1

As shown in FIG. 1 , the present invention provides a fuel cell composite sealant wire structure, comprising a first sealing member 2 and a second sealing member 3 , the hardness of the first sealing member 2 is smaller than that of the second sealing member 3 hardness; the first sealing member 2 is provided with a groove, the second sealing member 3 is fixed in the groove, and the vertex of the second sealing member 3 is flush with the vertex of the groove; The gas permeability of the material used for the first sealing member 2 is lower than the gas permeability of the material used for the second sealing member 3. Therefore, the composite sealing structure formed by the first sealing member 2 and the second sealing member 3 is more efficient than the first sealing member. 2. The composite sealing structure composed of the material used has a lower gas passage rate, so that the composite sealing glue line structure has better sealing performance; the first sealing member adopts a rubber material with low hardness and poor gas barrier property; The second sealing member is made of a rubber material with higher hardness and better gas barrier property, with smaller compression set and better aging resistance; the two sides of the second sealing member 3 are respectively connected to the inner wall of the groove. A sealed space 4 is formed. When the sealant line is installed on the MEA frame 1, the two sealed spaces 4 have a fluid-solid coupling sealing effect. The gas passes through the two sealed spaces 4, and the pressure difference loss is significant, which improves the sealing effect. reliability.

Further, the first sealing member 2 is processed by a compression molding process.

Further, the second sealing member 3 is formed by using a glue dispensing process to dispense glue into the groove and then form it naturally, and the surface of the second sealing member 3 is arc-shaped.

Further, the hardness of the first sealing member 2 is greater than or equal to 40 Shore and less than or equal to 60 Shore, and the hardness of the second sealing member is greater than or equal to 50 Shore and less than or equal to 70 Shore.

Further, the first sealing member 2 is made of silicone rubber, and the second sealing member 3 is made of fluororubber, EPDM or butyl rubber.

Further, the first sealing member 2 is made of fluorine rubber, and the second sealing member 3 is made of EPDM or butyl rubber.

Further, the first sealing member 2 is made of butyl rubber, and the second sealing member 3 is made of EPDM rubber.

Further, during processing, after the first sealing member 2 is demolded, a special clamp can be used to fix it on the working platform of the glue dispenser, and then the liquid silica gel can be dispensed onto the first sealing member 2 by the glue dispenser. The second sealing member 3 is obtained by natural molding in the groove.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention .

Claims (7)

1. A fuel cell composite sealant line structure, characterized by comprising a first sealing member and a second sealing member, wherein the hardness of the first sealing member is lower than the hardness of the second sealing member; the first sealing member is provided with There is a groove, the second sealing member is fixed in the groove, and the vertex of the second sealing member is flush with the vertex of the groove; the gas permeability of the material used for the first sealing member is lower than Gas permeability of the material used for the second sealing member; a sealed space is formed between two sides of the second sealing member and the inner wall of the groove. 2 . The fuel cell composite sealant wire structure according to claim 1 , wherein the first sealing member is processed by a compression molding process. 3 . 3 . The fuel cell composite sealing glue line structure according to claim 1 , wherein the second sealing member is formed by using a glue dispensing process to dispense glue into the groove and then form it naturally, and the second sealing member is formed. 4 . The surface of the sealing member is arc-shaped. 4 . The fuel cell composite sealant wire structure according to claim 1 , wherein the hardness of the first sealing member is greater than or equal to 40 Shore and less than or equal to 60 Shore, and the hardness of the second sealing member is greater than or equal to 60 Shore. 5 . Equal to 50 Shore, less than or equal to 70 Shore. 5 . The fuel cell composite sealant line structure according to claim 1 , wherein the first sealing member is made of silicone rubber, and the second sealing member is made of fluororubber, EPDM or butyl. 6 . Made of rubber. 6 . The fuel cell composite sealant line structure according to claim 1 , wherein the first sealing member is made of fluorine rubber, and the second sealing member is made of EPDM or butyl rubber. 7 . 7 . The fuel cell composite sealant line structure according to claim 1 , wherein the first sealing member is made of butyl rubber, and the second sealing member is made of EPDM rubber. 8 .

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