Method of operating an electrochemical cell stack
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United States of America Patent
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Apr 25, 1989
Issued Date -
N/A
app pub date -
Nov 2, 1987
filing date -
Dec 29, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A seal structure 60 for a porous plate of an electrochemical cell, such as plates 18, 20, includes a sealing material disposed in a seal region 66 of the plate to form a hydrophilic barrier to gas with an electrolyte and a hydrophobic layer 62 to block the loss of electrolyte from the hydrophilic layer is disclosed. Various construction details including a method for making the plate are disclosed which increase the cross pressure the sealing region of the plate can withstand. In one embodiment, the seal region 66 is impregnated with powder having a low structure and predetermined particle size using a pressurized liquid carrier. A FEP Teflon film bonds adjacent electrolyte reservoir plates together.
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