Moisture barrier for battery with electrochemical tester
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United States of America Patent
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Oct 11, 1994
Grant Date -
N/A
app pub date -
Jul 22, 1992
filing date -
Jul 22, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The combination of a main electrochemical cell (or battery cell) and a battery tester connected to the cell is disclosed. The battery tester is moisture sensitive, typically of the electrochemical type having a film-like construction comprising an anode layer, a cathode layer and electrolyte layer therebetween. The tester may be applied against the cell's outer surface. A moisture vapor barrier film is applied over the tester and adhesively secured to the cell's surface. The moisture barrier film is flexible, optically clear or at least translucent, and has a very low moisture vapor transmission rate. The moisture vapor barrier is preferably composed of mica film, but may desirably also be a film of polyparaxylylene or glass coated polymer. A hydrophobic hot melt, solvent-based or reactive thermosetting adhesive may be employed to bond the moisture vapor barrier film to the cell's surface. The moisture barrier film prevents ambient moisture from passing to the tester and interfering with its operation.
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