Alignment method for preparing membrane electrode sealing border of fuel cell

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...

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