Cylindrical battery
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United States of America Patent
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-
Jun 10, 1997
Grant Date -
N/A
app pub date -
Mar 19, 1996
filing date -
May 9, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cylindrical battery having a high utilization rate and a high discharge capacity rate is disclosed. It has an electrode group configured by rolling up two sheet electrodes of opposite polarity in spiral fashion interposing a separator therebetween, wherein one of the electrodes is provided with a porous metal substrate having a higher porosity layer and a lower porosity layer which has a considerably smaller thickness than that of the higher porosity layer, and an active material filled substantially in the spaces of the higher porosity layer of the porous metal substrate.
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