Title:
CYLINDRICAL BATTERY
Document Type and Number:
WIPO Patent Application WO/2017/090219
Kind Code:
A1
Abstract:
This cylindrical battery is provided with: an electrode group obtained by rolling up a positive electrode, a negative electrode, and a first separator interposed therebetween, which all have a belt-like shape; an electrolyte; a bottomed cylindrical battery case; and an opening sealing plate. The negative electrode is provided with a negative electrode collector and negative electrode active material layers formed on both surfaces of the negative electrode collector. The negative electrode has a thin part provided at an area within a length L3 from the outer end of the negative electrode; a tapered part adjacent to the thin part; and a body part other than these parts. The thickness of the negative electrode active material layer on the outer peripheral side of the tapered part is gradually reduced from the body part side toward the thin part side. The electrode group is formed such that the outer end of the positive electrode overlaps the tapered part via the first separator, and further includes a second separator interposed between the tapered part and the outer end of the positive electrode.
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Inventors:
OOTSUKA MASAO
NAKAMURA YASUSHI
OKABE AKIKO
NAKAMURA YASUSHI
OKABE AKIKO
Application Number:
PCT/JP2016/004301
Publication Date:
June 01, 2017
Filing Date:
September 21, 2016
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M10/28; H01M4/02; H01M4/06; H01M4/24; H01M6/10; H01M10/04; H01M10/30; H01M50/107
Foreign References:
| JP2005056681A | 2005-03-03 | |||
| JP2014216261A | 2014-11-17 | |||
| JP2014157674A | 2014-08-28 | |||
| JP2004031217A | 2004-01-29 | |||
| JPH08203556A | 1996-08-09 | |||
| JPH09213361A | 1997-08-15 |
Attorney, Agent or Firm:
KAMATA, Kenji et al. (JP)
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