Title:
FLAT-WINDING TYPE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2014/207883
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a flat-winding type secondary battery, the manufacturing step of which can be simplified with a simple structure.
The flat-winding type secondary battery (100) of the present invention has a flat winding group (3) in which a positive electrode (34) and a negative electrode (32) are wound with a separator (33, 35) interposed therebetween. The winding group (3) has a shaft core (80) configured such that the end portions (81c1, 81c2) of a sheet member (81) on both sides in a winding direction are each folded back in such a direction that the end portions (81c1, 81c2) approach each other and are disposed at positions apart from each other, said sheet member (81) having a bending rigidity higher than that of any one of the positive electrode (34), the negative electrode (32), and the separator (33, 35).
Inventors:
IIZUKA YOSHINORI (JP)
WATANABE SATOSHI (JP)
ARIGA TOSHIYUKI (JP)
WATANABE SATOSHI (JP)
ARIGA TOSHIYUKI (JP)
Application Number:
PCT/JP2013/067768
Publication Date:
December 31, 2014
Filing Date:
June 28, 2013
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H01M10/0587; H01M10/04
Domestic Patent References:
| WO2011148866A1 | 2011-12-01 | |||
| WO2010087384A1 | 2010-08-05 |
Foreign References:
| JP2005116186A | 2005-04-28 | |||
| JPH06187959A | 1994-07-08 | |||
| JP2000138076A | 2000-05-16 | |||
| JP2000040501A | 2000-02-08 |
Attorney, Agent or Firm:
HIRAKI Yusuke et al. (JP)
Yusuke Hiraki (JP)
Yusuke Hiraki (JP)
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