Title:
電池
Document Type and Number:
Japanese Patent JP5626170
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electrode group in which there is no influence of jumping of an electrode even if the curvature of the electrode group is large.SOLUTION: A positive electrode 4 formed by coating a strip positive electrode collector with a positive electrode mixture, a negative electrode 2 formed by coating a strip negative electrode collector with a negative electrode mixture, and a separator 6 existing between the positive electrode 4 and the negative electrode 2 are laminated and wound to form an electrode group which is then housed in a metal case 8, and thus obtaining a battery. In such a battery, the outermost periphery of the electrode group has a radius of curvature of 2.0 mm or less, and the end-of-winding of the positive electrode 4 has an uncoated part where the positive electrode collector is not coated with the positive electrode mixture.
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Inventors:
米田 慧介
柿沼 彰
柿沼 彰
Application Number:
JP2011212108A
Publication Date:
November 19, 2014
Filing Date:
September 28, 2011
Export Citation:
Assignee:
パナソニック株式会社
International Classes:
H01M10/0587; H01M4/13
Attorney, Agent or Firm:
Yoshiaki Tokuda
Fujii Kentaro
Fujii Kentaro