Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2013/175916
Kind Code:
A1
Abstract:
The purpose of the present invention is to improve the reliability of a gas discharge valve of a nonaqueous electrolyte secondary battery. A nonaqueous electrolyte secondary battery which is provided with: an electrode coil body; a battery can in which the electrode coil body is contained; a battery top cover which seals the battery can; and a gas discharge part that is provided onto the battery top cover. This nonaqueous electrolyte secondary battery is characterized in that: the battery top cover is provided with a gas discharge port; the gas discharge part is provided so as to protrude from the battery top cover toward the electrode coil body; the gas discharge part has a reinforcing material and a gas discharge valve; the battery top cover and the gas discharge part are integrally formed by means of the reinforcing material; the gas discharge valve is provided with a groove; the gas discharge valve is formed within the battery can; and the cross-sectional area of the gas discharge valve is larger than the opening area of the gas discharge port.
Inventors:
KUBOTA OSAMU (JP)
YONEMOTO MASAHIRO (JP)
SASAKI HIRONORI (JP)
YONEMOTO MASAHIRO (JP)
SASAKI HIRONORI (JP)
Application Number:
PCT/JP2013/061707
Publication Date:
November 28, 2013
Filing Date:
April 22, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01M50/15
Foreign References:
| JP2005332700A | 2005-12-02 | |||
| JP2002367582A | 2002-12-20 | |||
| JPH07296790A | 1995-11-10 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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