Airtightness inspection method and airtightness inspection apparatus for sealed battery
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United States of America Patent
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Oct 18, 2016
Grant Date -
Jun 6, 2013
app pub date -
Jun 15, 2011
filing date -
Jun 17, 2010
priority date (Note) -
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Abstract
A soft packaged sealed battery is contained in an airtight container. The airtight container is decompressed and images of the surface shape of the sealed battery in the airtight container before and after decompression are captured by a CCD camera or the like. Whether or not airtightness of the sealed battery is maintained is determined based on a change in the captured images, e.g. a change in the surface shape appearing as luminance differences of pixels. By this determination method, highly accurate airtightness determination is realized by eliminating the influence of invisible fine creases on a sealed battery surface.
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