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Polyimide protected battery feedthrough

  • US 20040191621A1
  • Filed: 03/24/2003
  • Published: 09/30/2004
  • Est. Priority Date: 03/24/2003
  • Status: Abandoned Application
First Claim
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1. A method of protecting vulnerable surfaces of a feedthrough within a housing of an electrochemical cell enclosing a reactive chemical compound, the feedthrough comprising an electrically conductive ferrule, an elongated electrically conductive feedthrough pin, and annular glass insulator supporting the electrically conductive feedthrough pin spaced from the feedthrough ferrule, comprising:

  • attaching the feedthrough ferrule of the feedthrough to a side wall of the housing to dispose the feedthrough pin extending through the side wall; and

    coating the interior surface of the feedthrough insulator vulnerable to degradation upon contact with the reactive chemical compound with polyimide that forms a polyimide coating that tenaciously adheres to the vulnerable surfaces and is resistant to degradation by the reactive chemical compound.

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