Secondary lithium ion cell or battery, and protecting circuit, electronic device, and charging device of the same
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United States of America Patent
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Jul 6, 2010
Grant Date -
Oct 21, 2004
app pub date -
Sep 28, 2002
filing date -
Sep 28, 2001
priority date (Note) -
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Abstract
The present invention provides a new method for improving capacity, average operating voltage and specific energy of a secondary lithium ion cell or battery. This method is achieved by means of properly adjusting the ratio between a positive material and negative material, which is calculated by theoretical specific energy, and properly increasing charge cut-off voltage. The present method can greatly increasing specific energy and average operating voltage of a secondary lithium ion cell without influence on recycle property of the cell. The present invention also provides a secondary lithium ion cell or battery practicing the method, a protecting circuit adapted for the secondary lithium ion cell or battery, a electronic device using said protecting circuit and said secondary lithium ion cell or battery, and a charging device for the secondary lithium ion cell or battery.
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