Patent ID: 9470666
Filing Date: 2016-10-18
CPC Classification: G01N

Claim Text:
1. A pinhole inspection apparatus for a membrane electrode assembly of a fuel cell, the apparatus comprising: a lower fixture configured to support the membrane electrode assembly; deionized water uniformly distributed on an upper surface of the membrane electrode assembly; a pH test paper inserted between the membrane electrode assembly and the lower fixture, an upper fixture which presses against a top surface of the membrane electrode assembly; and a slip sheet which is placed over the top surface of the membrane electrode assembly to prevent debris from being transferred to the membrane electrode assembly, wherein when there is a pin hole in the membrane electrode assembly, the pH test paper is discolored upon coming in contact with the deionized water at a pH 7 that passes through the pinhole to detect the presence and position of the pinhole in the membrane electrode assembly, wherein the deionized water is distributed on an electrode surface of the membrane electrode assembly by being supplied to an electrode surface of the membrane electrode assembly using a pipette.