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Title:
CYLINDRICAL SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2002203589
Kind Code:
A
Abstract:

To provide a cylindrical secondary battery having good performance by reducing a short circuit depending on softening and swelling of an active material in a winding central part accompanying the progress of a recharging/ discharging cycle.

In the cylindrical secondary battery having a spiral electrode plate group that a positive electrode which makes a positive-electrode active material hold on a positive-electrode base substance, and a negative electrode which makes a negative-electrode active material hold on a negative-electrode base substance are wound through a separator, the cylindrical secondary battery is constituted so that at least one of the two of the above positive/negative electrode may be formed with an active-material non-holding part 12 in the start end of the winding on the face of the base substance. Then, the cylindrical secondary battery having good performance is provided by reducing the short circuit depending on softening and swelling of the active material in the winding central part accompanying the progress of the recharging discharging cycle.


Inventors:
NAKAMURA TOSHIMICHI
Application Number:
JP2000398870A
Publication Date:
July 19, 2002
Filing Date:
December 27, 2000
Export Citation:
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Assignee:
JAPAN STORAGE BATTERY CO LTD
International Classes:
H01M4/64; H01M4/14; H01M4/68; H01M4/72; H01M4/78; H01M10/04; (IPC1-7): H01M10/04; H01M4/14; H01M4/64; H01M4/68; H01M4/72; H01M4/78



 
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