Title:
LITHIUM ION SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME AND APPARATUS FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2015/156213
Kind Code:
A1
Abstract:
Conventional lithium ion secondary batteries have a problem such that in cases where an insulating material, which forms a separator, is applied onto a coated electrode of a lithium ion secondary battery, the coverage by the insulating material decreases in the edge portion of the electrode layer, thereby increasing the risk of defects due to short circuit.
In order to solve the above-described problem, an electrode material and a first insulating material are applied onto an electrode substrate that is fed at a predetermined speed, said first insulating material being applied to portions adjacent to both sides of the electrode material in a direction perpendicular to the feeding direction of the electrode substrate; a second insulating material is applied onto the surfaces of the applied electrode material and first insulating material; and the applied electrode material and first and second insulating materials are dried and affixed according to the present invention. Consequently, the coverage of the edge portion of the electrode layer, which is formed of the electrode material, by the insulating layer is increased, so that short circuit defects can be reduced even in cases where the electrode layer is thick.
Inventors:
TAKAHARA YOICHI (JP)
NISHIKI MASASHI (JP)
KUBOTA CHIEMI (JP)
NINOMIYA EISAKU (JP)
MATSUOKA MASAOKI (JP)
MORI KYOICHI (JP)
FUJII TAKESHI (JP)
NISHIKI MASASHI (JP)
KUBOTA CHIEMI (JP)
NINOMIYA EISAKU (JP)
MATSUOKA MASAOKI (JP)
MORI KYOICHI (JP)
FUJII TAKESHI (JP)
Application Number:
PCT/JP2015/060524
Publication Date:
October 15, 2015
Filing Date:
April 02, 2015
Export Citation:
Assignee:
HITACHI HIGH TECH CORP (JP)
International Classes:
H01M10/058; H01M2/18; H01M4/139; H01M4/62; H01M10/0587
Foreign References:
| JP2013069495A | 2013-04-18 | |||
| JP2011243351A | 2011-12-01 | |||
| JP2012099385A | 2012-05-24 | |||
| JP2007227136A | 2007-09-06 | |||
| JP2007242575A | 2007-09-20 | |||
| JP2008021644A | 2008-01-31 |
Attorney, Agent or Firm:
SEIRYO I. P. C. (JP)
青稜 patent business corporation (JP)
青稜 patent business corporation (JP)
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