Fuel cell including bipolar plates having welds not superimposed with welds of adjacent bipolar plates
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United States of America Patent
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Jul 4, 2017
Grant Date -
Jul 17, 2014
app pub date -
May 25, 2012
filing date -
May 30, 2011
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Abstract
A fuel cell includes three membrane-electrode assemblies. and first and second bipolar metal plates interposed between the membrane-electrode assemblies. Each of the bipolar plates comprises two metal sheets facing a respective membrane-electrode assembly and fixedly attached by welds. The two metal sheets comprise successive guiding channels for guiding gas extending in a common longitudinal direction. The guiding channels are distributed in a transversal direction The welds are made in bottoms of the guiding channel and include welds of the first bipolar plate and welds of the second bipolar plate. Some of the welds of the first bipolar plate are not superimposed on the welds of the second bipolar plate and are offset longitudinally and transversally relative to the welds of the second bipolar plate.
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