Title:
SECONDARY BATTERY, MANUFACTURING METHOD FOR SECONDARY BATTERY, ELECTRONIC DEVICE, AND ELECTRIC TOOL
Document Type and Number:
WIPO Patent Application WO/2021/124828
Kind Code:
A1
Abstract:
In this secondary battery, an electrode winding body and an electrolyte fluid are stored in a battery can, the electrode winding body having a structure in which a strip-like positive electrode and a strip-like negative electrode are stacked and wound with a separator therebetween, the secondary battery including a battery lid that closes an open end of the battery can and a safety valve mechanism provided between the battery lid and the electrode winding body, wherein: the safety valve mechanism is provided with at least a safety cover; an outer periphery of the battery lid and an outer periphery of the safety cover are joined; and the area of the region where the outer periphery of the battery lid and the outer periphery of the safety cover are joined is 18.1-25.0% of the area of a radial cross-section of the battery. FIG 2:
Inventors:
SODEYAMA KUNIO (JP)
NOMURA YU (JP)
YANAGIDA KOSUKE (JP)
KOKUBU NORIAKI (JP)
WAKUI HIDEHIKO (JP)
NOMURA YU (JP)
YANAGIDA KOSUKE (JP)
KOKUBU NORIAKI (JP)
WAKUI HIDEHIKO (JP)
Application Number:
PCT/JP2020/044024
Publication Date:
June 24, 2021
Filing Date:
November 26, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M50/342; H01M10/04; H01M50/147; H01M50/572
Foreign References:
| JP2007194167A | 2007-08-02 | |||
| JP2009266782A | 2009-11-12 | |||
| JP2011192550A | 2011-09-29 | |||
| JP2007194167A | 2007-08-02 |
Attorney, Agent or Firm:
SUGIURA, Takuma et al. (JP)
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