Title:
二次電池、電子機器及び電動工具
Document Type and Number:
Japanese Patent JP7380825
Kind Code:
B2
Abstract:
Disclosed is a secondary battery in which a negative electrode has a covered portion covered with a negative electrode active material covering portion and a negative electrode active material non-covered portion on a strip-shaped negative electrode foil, the negative electrode active material non-covered portion is joined to a negative electrode current collector plate at the other end portion of the electrode winding body, the electrode winding body has a flat surface formed by bending any one or both of a positive electrode active material non-covered portion and the negative electrode active material non-covered portion toward a central axis of the wound structure and overlapping the positive electrode active material non-covered portion and the negative electrode active material non-covered portion, and a first groove formed in the flat surface, at least one C-shaped second groove is included in a can bottom of a battery can.
Inventors:
Miyabi Takahashi
Yuken Fukudome
Yuken Fukudome
Application Number:
JP2022501719A
Publication Date:
November 15, 2023
Filing Date:
January 22, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H01M10/04; H01M50/107; H01M50/342; H01M50/533; H01M50/534; H01M50/538
Domestic Patent References:
| JP2001052756A | ||||
| JP2004071266A | ||||
| JP2011134663A | ||||
| JP2007335156A |
Foreign References:
| WO2017094228A1 | ||||
| WO2014045569A1 |
Attorney, Agent or Firm:
Takuma Sugiura
Masatomo Sugiura
Masatomo Sugiura