ELECTRODE GROUP FOR USE IN A LITHIUM ION BATTERY
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United States of America Patent
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Issued Date -
Jul 8, 2010
app pub date -
Dec 17, 2009
filing date -
Jan 8, 2009
priority date (Note) -
Abandoned
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Abstract
An electrode group is configured for use in a lithium ion battery. The electrode group includes an anode plate and a cathode plate wound with a separator interposed therebetween. At least one metal oxide layer is disposed between the anode plate and the cathode plate. The metal oxide layer is provided at two length edges of the anode plate and/or the cathode plate, corresponding to the cutting edge of the cathode current collector where the cut burr formed in cutting process. Even though the cut burrs can pierce through the separator, the cut burrs still cannot contact the anode film. Any internal circuit short, caused by contact between the aluminum foil and the anode film, may therefore be avoided and, therefore, the performance of the lithium ion battery is remarkably improved.
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