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Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2006338993
Kind Code:
A
Abstract:

To prevent deformation of a negative electrode current collector due to expansion and shrinkage in volume of a negative electrode active material accompanying charge/discharge, or dimensional change of a battery due to expansion of a negative electrode active material in the thickness direction.

In this nonaqueous electrolyte second battery, a fine negative electrode current collector exposed portion, on which lines are provided having a width of not more than 100 μm, or lines having a width of not more than 100 μm and intersected each other is formed on a negative electrode active material layer coated on a negative electrode current collector. The fine negative electrode current collector exposed portion is formed in such a way that a negative-electrode mixture layer containing a negative electrode active material is coated on the exposed portion from above a mesh made of nylon fiber etc., then the mesh is removed, or a negative-electrode mixture layer is coated on the surface of a transfer roll preliminarily having grooves, and then transferred on the negative electrode collector.


Inventors:
SHIBUYA MASHIO
Application Number:
JP2005161176A
Publication Date:
December 14, 2006
Filing Date:
June 01, 2005
Export Citation:
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Assignee:
SONY CORP
International Classes:
H01M4/02; H01M4/133; H01M4/134; H01M4/1393; H01M4/1395; H01M4/36; H01M4/38; H01M10/05; H01M10/052; H01M10/0525; H01M10/0565; H01M10/0587
Attorney, Agent or Firm:
Masatomo Sugiura