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Sealing structure preparing method and membrane electrode and bipolar plate sealing and connection method

A sealing structure and membrane electrode technology, which is applied in the direction of sealing/supporting devices, circuits, fuel cells, etc., can solve the problems of uneven thickness and poor flatness of the sealing ring, and achieve favorable sealing connection, good flatness, and improved size The effect of precision

Active Publication Date: 2020-10-02
武汉理工新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing ring formed by this method has uneven thickness and poor flatness

Method used

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  • Sealing structure preparing method and membrane electrode and bipolar plate sealing and connection method
  • Sealing structure preparing method and membrane electrode and bipolar plate sealing and connection method
  • Sealing structure preparing method and membrane electrode and bipolar plate sealing and connection method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The preparation method cooperates with the mold for preparation. Figure 5 For the exploded view of the mold 200 and the membrane electrode 100 provided for the embodiment of the present application, please refer to Figure 5 , the mold 200 has a mold cavity and a liquid inlet 230 communicating with the mold cavity. Further, the mold 200 includes an upper mold 210 and a lower mold 220 , the upper mold 210 has an upper mold cavity, the lower mold 220 has a lower mold cavity 221 , and the liquid inlet 230 communicates with both the upper mold cavity and the lower mold cavity 221 .

[0041] As shown in the figure, an upper mold cavity is formed on the lower surface of the upper mold 210, and the upper mold cavity has a certain depth (the depth is not limited, mainly related to the compression performance (elasticity) of the sealing ring and the sealing groove of the bipolar plate. depth), the shape of the upper mold cavity is consistent with the shape of the upper glue zo...

Embodiment 2

[0059] Figure 7 The second flow chart of the method for preparing the sealing structure on the membrane electrode 100 provided in the embodiment of the present application, Figure 8 A cross-sectional view of the sealing structure on the membrane electrode 100 provided in the embodiment of the present application. see Figure 7 with Figure 8 , this embodiment also provides a method for preparing a sealing structure on the membrane electrode 100, this embodiment is an improvement on the basis of the technical solution in Example 1, and the technical solution described in Example 1 is also applicable to this embodiment The technical solution disclosed in Embodiment 1 will not be described again. The difference between this embodiment and Embodiment 1 is: before placing the membrane electrode 100 with a frame in the mold 200, a coating is applied to the glue area of ​​the frame. A layer of adhesive is then cured to form an adhesive layer 170 for limiting slippage of the seal...

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Abstract

The invention provides a sealing structure preparing method and a membrane electrode and a bipolar plate sealing and connection method. The sealing structure is prepared in cooperation with a mold, wherein the mold has a mold cavity and a liquid inlet in communication with the mold cavity. The membrane electrode comprises a frame providing with a glue placing area. The preparation method comprisesthe following steps that a membrane electrode with the frame is placed in a mold, so that the mold cavity of the mold and the glue placing region define a communication glue cavity. A flowable sealing ring raw material fills the glue cavity from a liquid inlet, so that the sealing ring raw material flows in the glue cavity and fills the glue cavity. The sealing ring raw material is cured to forma sealing ring is formed on the glue placing area, and the membrane electrode with the sealing ring is taken out. According to the preparation method, a thickness and a width of the sealing ring are more uniform, flatness of the sealing ring is better, and the sealing connection between the membrane electrode and the bipolar plate is facilitated.

Description

technical field [0001] The present application relates to the technical field of preparation of fuel cells, in particular, to a preparation method of a sealing structure and a sealing connection method of a membrane electrode and a bipolar plate. Background technique [0002] A fuel cell is a battery stack with a certain output voltage and power formed by a plurality of stacked single cells connected in series. The single cell includes a bipolar plate and a membrane electrode (MEA, Membrane Electrode Assemblies) sandwiched between the bipolar plates. There are flow channels on the bipolar plate, which can separate fuel gas (for example: hydrogen) and oxidant (for example: oxygen or air ), prevent gas from passing through, collect and conduct electric current. [0003] In order to avoid the occurrence of gas seepage, or the cross leakage of different types of gases, a seal is required between the membrane electrode and the bipolar plate. In the prior art, glue is usually di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C45/26H01M8/0286H01M8/0273H01M8/0276H01M8/0297H01M8/1004B29L31/34B29L31/26
CPCB29C45/14B29C45/2602H01M8/0286H01M8/0273H01M8/0276H01M8/0297H01M8/1004B29L2031/3468B29L2031/265Y02E60/50
Inventor 梅坚潘牧戈琛范卫东宛朝辉刘素芬
Owner 武汉理工新能源有限公司