METHOD FOR MAKING COMPLEX BIPOLAR PLATES FOR FUEL CELLS USING EXTRUSION
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United States of America Patent
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Issued Date -
Apr 14, 2016
app pub date -
Sep 30, 2015
filing date -
Oct 11, 2014
priority date (Note) -
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Abstract
Improved bipolar plates comprising complex features can be manufactured for fuel cells in a simple, low cost manner by starting with an appropriate extruded piece. The complex features include one or more fluid ports which connect to channels internal to the bipolar plate. The method includes extruding a continuous sheet with appropriate linear channels on each surface of the sheet as well as within the sheet, transversely cutting the sheet, machining a fluid port or ports through the sheet to intersect with appropriate internal linear channels, machining at least two sealing ports through the sheet to intersect with the internal linear channels on opposite sides of the fluid ports, and applying sealant into the sealing ports in order to make appropriate seals to the internal linear channels.
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