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Title:
WOUND TYPE BATTERY AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2007026939
Kind Code:
A
Abstract:

To provide a wound type battery in which the winding end part can be arranged at a desired position without affecting the battery characteristics even in the wound type battery having an electrode body flatly wound by a flat winding core, and its manufacturing method.

The lithium ion secondary battery 10 has an electrode body 11 in which a positive electrode plate 21 coated with a positive electrode active material 24 and a negative electrode plate 22 coated with a negative electrode active material 26 are wound by being insulated by a separator, and a case 12 which houses the electrode body 11 together with an electrolyte. Non-coated areas L2, L4 on which the active materials 24, 26 are not coated are formed at the area adjoining the winding ends 21e, 22e of at least one of the positive electrode plate 21 and the negative electrode plate 22.


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Inventors:
Arakawa, Hiroshi
Application Number:
JP2005000208494
Publication Date:
February 01, 2007
Filing Date:
July 19, 2005
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
International Classes:
H01M10/04; H01M4/02; H01M4/04; H01M10/0525; H01M10/0587
Domestic Patent References:
JP2005108598A2005-04-21
JP2003086233A2003-03-20
JP2003288941A2003-10-10
Attorney, Agent or Firm:
特許業務法人コスモス特許事務所



 
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