Reducing DC Resistance In Electrochemical Cells By Increasing Cathode Basis Weight
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United States of America Patent
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Issued Date -
Aug 5, 2010
app pub date -
Oct 26, 2005
filing date -
Oct 26, 2004
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Abandoned
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Abstract
The use of an increased cathode weight and thickness or basis weight in a primary electrochemical cell for the purpose of reducing DC resistance (Rdc) is described. This is particularly important when the cell is subjected to high rate discharge conditions of the type typically required for medical device applications, such as activating a cardiac defibrillator. A preferred couple is of a lithium/silver vanadium oxide (Li/SVO) cell or a lithium/copper silver vanadium oxide (Li/CSVO) cell. Reducing cell Rdc by increasing basis weight has the added benefit of increasing the cell's energy density through comparatively greater amounts of active cathode material in a give casing volume.
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