Alignment method for preparing membrane electrode sealing border of fuel cell

A fuel cell membrane and sealing edge technology, which is applied to fuel cell components, fuel cells, circuits, etc., can solve problems such as explosion, fuel cell failure, and influence on membrane electrode processing, and achieve the effect of being easy to distinguish from each other

Inactive Publication Date: 2012-07-11
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

[0012] (1) Affecting the processing of membrane electrodes
The gas diffusion layer needs to be laminated on the basis of the position of the sealing frame. The alignment accuracy of the sealing frame is not high, which will affect the laminating position of the gas diffusion layer. damage or even breakage;
[0013] (2) Reduce the power density and reliability of the fuel cell stack
In order to improve the adaptability to poor precision membrane electrodes and align the components, the size of each component of the stack needs to be made larger accordingly, which reduces the power density of the stack; at the same time, the deviation of the assembly size will bring Many problems, such as flow channel blockage, polymer ion exchange membrane damage, gas leakage at the inlet and outlet, and gas leakage, can easily lead to the mixing of hydrogen and oxygen, and there is even a risk of explosion in the presence of catalysts, which greatly reduces the reliability of the fuel cell stack. sex;
[0014] (3) Reduce the durability of the fuel cell
Poor precision results in incorrect positional relationship of the various parts of the membrane electrode, which causes the polymer ion exchange membrane to be damaged after a short period of operation of the membrane electrode, which leads to the failure of the fuel cell and reduces the life of the fuel cell;
[0015] (4)

Method used

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  • Alignment method for preparing membrane electrode sealing border of fuel cell
  • Alignment method for preparing membrane electrode sealing border of fuel cell
  • Alignment method for preparing membrane electrode sealing border of fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0072] In this embodiment, the alignment target accuracy is: the alignment deviation of the cathode and anode active areas is not greater than 0.20 mm.

[0073] 1) Laminate the frames with a width of 170mm, and cut the active area A of the cathode sealing frame according to the position shown in Figure 2(a) 1 B 1 C 1 D. 1 , A 1 B 1 C 1 D. 1 is a rectangle, A 1 D. 1 Parallel to the length of the border overlay. A 1 B 1 =C 1 D. 1 =120mm, A 1 D. 1 =B 1 C 1 =200mm.

[0074] 2) While punching the active area of ​​the cathode sealing frame, punch and apply the cathode alignment mark E on the support film of the cathode frame laminate in the direction of the frame film at the position shown in Figure 2(a) 1 o 1 f 1 , where E 1 o 1 ⊥F 1 o 1 ,E 1 o 1 / / A 1 D. 1 ,E 1 o 1 =F 1 o 1 = 4mm, O 1 to A 1 D. 1 The distance is 20.00mm, O 1 to A 1 B 1 The distance is 60.00mm. E. 1 o 1 , F 1 o 1 The punching depth does not exceed the thickness of the supp...

Embodiment 2

[0083] In this embodiment, the alignment target accuracy is: the alignment deviation of the cathode and anode active areas is not greater than 0.20 mm.

[0084] 1) if Figure 6 As shown, the frame with a width of 170mm is laminated M, and the active area of ​​the cathode sealing frame is punched out a 1 , b 1 、c 1 … g 1 、h 1 i 1 , a 1 , b 1 、c 1 … g 1 、h 1 i 1 They are all rectangles of 200mm×120mm, where the length direction is 200mm and the width direction is 120mm. Each rectangular active area is 20mm away from the positive edge of the frame laminate material in the width direction, and 30mm from each rectangular active area to the negative edge of the frame laminate material in the width direction, and the distance between each rectangular active area is equal. While punching the active area, the cathode alignment marks are simultaneously punched on the edge of the frame laminated support film, and the positions of each cathode alignment mark are fixed and the ...

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Abstract

The invention relates to an alignment method for preparing a membrane electrode sealing border of a fuel cell. The membrane electrode sealing border is prepared by the following steps of: applying a negative electrode alignment mark to a negative electrode sealing border, and applying a positive electrode alignment mark to a positive electrode sealing border; judging the alignment deviation between the active area of the negative electrode sealing border and the active area of the positive electrode sealing border through human eyes identification or optical identification or CCD (charge coupled device) identification according to a pattern formed by the negative electrode alignment mark and the positive electrode alignment mark in the plane direction vertical to the sealing border; adjusting the relative positions of the negative electrode sealing border and the positive electrode sealing border according to the alignment deviation, and performing alignment coverage of the negative electrode sealing border, a polymer ion exchange membrane and the positive electrode sealing border in a certain precision range so that the active area of the prepared membrane electrode sealing border has relatively high alignment precision and the active area of the membrane electrode can be accurately controlled. The method is suitable for the alignment precision control in the batch production of the membrane electrode sealing border.

Description

field of invention [0001] The invention relates to a membrane electrode preparation technology of a polymer ion exchange membrane fuel cell, in particular to an alignment method for sealing frame active regions in the membrane electrode preparation process. Background of the invention [0002] Polymer ion-exchange membrane fuel cell (PEMFC) has the advantages of high power density, high energy conversion efficiency, low-temperature start-up, and environmental friendliness. Today's deterioration has become one of the hot spots of international high-tech competition. Membrane electrode (MEA) is the most critical component of polymer ion exchange membrane fuel cells, and the polymer ion exchange membrane plays a role in conducting protons, blocking electrons from directly forming a loop inside the battery, and blocking direct contact between hydrogen and oxygen / air ( That is, the role of sealing). However, due to the very thin thickness of the polymer ion exchange membrane, i...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M8/0273
CPCY02E60/50Y02P70/50
Inventor 潘牧艾勇诚李笑晖宛朝辉廖鑫陈磊胡阿勇
Owner 武汉理工新能源有限公司
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