Title:
SEALED SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2014/045569
Kind Code:
A1
Abstract:
The main purpose of the present invention is to improve the safety of a sealed secondary battery. The present invention relates to a sealed secondary battery which is provided with: a battery case which has a bottomed cylindrical shape, and an opening; a sealing body for sealing the opening of the battery case; and a wound electrode group in which a positive electrode plate and a negative electrode plate are wound with a separator therebetween. An annular thinned portion is formed in the bottom of the battery case. The surface area of a region surrounded by the annular thinned portion is at least 10% of the surface area of the bottom of the battery case. The volume energy density of the sealed secondary battery is at least 500Wh/L.
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| JPS5979973 | [Title of the device] Storage battery |
| JP2006236775 | SECONDARY BATTERY |
| WO/1985/000469 | LOW PROFILE SEAL |
Inventors:
MIYATA KYOSUKE
INOUE KOKI
INOUE KOKI
Application Number:
PCT/JP2013/005505
Publication Date:
March 27, 2014
Filing Date:
September 18, 2013
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
H01M2/12; H01M2/02; H01M2/04; H01M2/26; H01M4/505; H01M4/525; H01M10/04; H01M10/0587
Domestic Patent References:
| WO2011145263A1 | 2011-11-24 |
Foreign References:
| JP2000285892A | 2000-10-13 | |||
| JPS60200456A | 1985-10-09 |
Attorney, Agent or Firm:
NAITO, Hiroki et al. (JP)
Hiroki Naito (JP)
Hiroki Naito (JP)
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