Title:
SECONDARY BATTERY, BATTERY PACK, ELECTRIC VEHICLE, ELECTRIC POWER STORAGE SYSTEM, ELECTRIC TOOL, AND ELECTRONIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/225394
Kind Code:
A1
Abstract:
A secondary battery is provided with: a storage member including a folding portion defining an open-end portion; a battery element which includes a positive electrode, a negative electrode, and an electrolyte, and which is stored in the storage member; a lid member which extends in an intersecting direction intersecting a storage direction of the battery element with respect to the storage member and thereby closes the open-end portion of the storage member, and which includes a lower surface opposing the battery element, an upper surface on the opposite side from the lower surface, and a side surface connected to both the lower surface and the upper surface; and a seal member interposed between the folding portion and the lid member. The folding portion is bent so as to be disposed along each of the lower surface, side surface, and upper surface of the lid member, and includes a specific folding part which is bent to be disposed along each of the side surface and upper surface of the lid member. A folding rate R1 (=(L1/D1)×100) which is calculated on the basis of an outer diameter D1 (mm) of the storage member defined by the folding portion in the intersecting direction, and a folding length L1 (mm) at the specific folding part in the intersecting direction is not less than 10% and not more than 13%.
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Inventors:
SODEYAMA KUNIO (JP)
Application Number:
PCT/JP2018/016086
Publication Date:
December 13, 2018
Filing Date:
April 19, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/04; H01M10/052; H01M10/0587; H01M50/107; H01M50/147; H01M50/184; H01M50/186; H01M50/193; H01M50/202; H01M50/213; H01M50/227; H01M50/271
Foreign References:
| JP2010282824A | 2010-12-16 | |||
| JP2006221909A | 2006-08-24 | |||
| JP2012243635A | 2012-12-10 | |||
| JP5160559B2 | 2013-03-13 | |||
| JP5269793B2 | 2013-08-21 | |||
| US8999564B2 | 2015-04-07 |
Other References:
See also references of EP 3637491A4
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (JP)
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