| 摘要 |
A method and a device for testing the quality of a sheet-like element (1) comprising a membrane (2) are presented. The quality test is limited to a part area of the sheet-like element (1), in that a useful material (7), provided for the use of the sheet-like element (1), is fed to one side of the sheet-like element (1) via a useful-material outlet orifice (8) of a housing (5, 5a, 5b), the area bounded by the useful-material outlet orifice corresponding to the part area to be tested. This method is appropriate, in particular, in the production of large-area membranes or membrane/electrode units provided for use in fuel cells. The quality test can take place in a simple way even during the production of these sheetlike elements (1). In this way, faults during production can be detected at an early stage and the production parameters changed accordingly. In the case of the testing of an MEU for a fuel cell, fuel gas can be applied to one side of the MEU in a punctiform manner via the housing (5, 5a, 5b). The oxygen of the ambient atmosphere located on the other side may serve as oxidation gas (11). While fuel gas (7) is being applied, the voltage generated between the electrodes (3, 4) of the MEU or the current flowing between them can be measured in order to check the quality of the MEU. |
