Pressing mold device for hot pressure prepared fuel cell membrane electrode

A fuel cell membrane and pressing mold technology, which is applied to fuel cell parts, battery electrodes, circuits, etc., can solve the problems of not ensuring the reliability of the membrane-electrode bonding, and failing to solve the problem of accurate positioning of each component of the membrane and electrode. Good membrane electrode interface structure, small cooling range and strong interchangeability

Active Publication Date: 2008-05-21
雄川氢能科技(广州)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is convenient and quick to prepare the membrane electrode, but it still fails to solve the problem of accurate positioning of the various parts of the membrane electrode. Due to the rolling and pressing, the membrane electrode will soon leave the pressing surface at high temperature, and the pressing temperature is generally controlled at The glass transition temperature of the ion-exchange membrane. At this time, the combination of the diffusion layer, the catalytic layer and the ion-exchange membrane is unstable, so this method cannot guarantee the reliability of the membrane-electrode combination, because generally the membrane-electrode must be placed in a pressed state. Cool down to a lower temperature before demoulding to ensure the reliability of membrane-electrode bonding

Method used

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  • Pressing mold device for hot pressure prepared fuel cell membrane electrode
  • Pressing mold device for hot pressure prepared fuel cell membrane electrode
  • Pressing mold device for hot pressure prepared fuel cell membrane electrode

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Embodiment 1

[0027]As shown in Figure 3, the pressing die device for hot pressing of the present invention to prepare fuel cell membrane electrodes includes: an upper pressing plate 31, an upper pressing plate and an upper die module release spring 32, an upper die holder 33, and an upper die head 34 , upper and lower die module disengagement spring 35, positioning frame 36, lower die head 37, lower die base 38, lower pressing plate and lower die module disengaging spring 39, lower pressing plate 40, positioning guide post 41, upper and lower die head and upper , Lower mold base sealing gaskets 42,44. Among the figures 31, 33, 38, 40 are all provided with positioning through-holes that are slidingly fitted with the positioning guide post 41. Grooves are provided at the centers of both sides of the upper and lower die heads 34 and 37, and arrayed small holes 34a and 37a are respectively provided with the two grooves, and the diameter of the holes is between 0.3-0.8mm. The groove between th...

Embodiment 2

[0031] Second embodiment of the present invention Referring to Fig. 7, this set of press-fitting die device for hot-pressing the preparation of fuel cell membrane electrodes and the die device in Embodiment 1 only change the shape of the upper and lower die grooves and the number of divisions. Used to prepare 4 pieces of active area of ​​20cm on the same ion exchange membrane 2 the membrane electrode. The positioning groove of the die head is evenly divided into 4 areas with an area of ​​20cm 2 region, the dimensions of each region are consistent with the diffusion layer.

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Abstract

The invention discloses a compound die device used in a hot pressing fuel battery film electrode, comprising a top pressing board, a top die, a positioning frame, a bottom die, a bottom pressing board, a plurality of positioning guide pillars and catapult springs; wherein the top die comprises a top die head and a top die base. A positioning groove for diffusion layers is arranged at the center ofthe contact surface between the top die head and the film electrode, so as to position the first diffusion layer of the film electrode. The bottom die comprises a bottom die head and a bottom die base, which has the same structure as the top die; wherein the bottom die head is used to position the second diffusion layer of the film electrode. The positioning frame is arranged between the top dieand the bottom die, a center bore in the positioning frame is used to position an ion exchange membrane. At least two positioning guide pillars are arranged on the bottom pressing board, aligning andpositioning the top pressing board, the top die, the positioning frame, the bottom die and the bottom pressing board in order. The catapult springs are respectively arranged between the pressing boards and the top, the bottom die, as well as between the top and the bottom die. The invention has the advantages of easy positioning and alignment, convenient, fast and energy-saving hot pressed film electrode.

Description

technical field [0001] The invention relates to a method for preparing fuel cell electrodes. Background technique [0002] A fuel cell is an electrochemical device that converts the chemical energy of fuel directly into electrical energy. It is not limited by the Carnot heat engine cycle, has high energy conversion efficiency, no pollution, no noise, and long service life, so it has broad application prospects in aerospace, transportation, mobile power and other fields. [0003] The core component of a fuel cell is the membrane electrode (MEA), which is where the electrochemical reaction of fuel and oxidant occurs to generate electricity. A single membrane electrode is shown in Figure 1. It has an ion-exchange membrane 1. The two sides of the ion-exchange membrane 1 are the cathode catalyst layer 2 and the anode catalyst layer 2' respectively. The outside of the cathode and anode catalyst layers are respectively the cathode diffusion layer 3 and the anode catalyst layer. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/02
CPCY02E60/50
Inventor 朱长满陈利康刘建国
Owner 雄川氢能科技(广州)有限责任公司
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