Title:
CYLINDRICAL BATTERY AND METHOD OF MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2019/187776
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to improve, in a cylindrical battery, the weld strength between an exterior can and a lead with respect to a force applied to a welded portion between the exterior can and the lead in a rotating direction of an electrode body. A cylindrical battery (20) comprises a bottomed cylindrical exterior can (50) containing an electrode body (22). A lead connected to one of a positive electrode and a negative electrode of the electrode body is led out from the electrode body (22) and welded to a bottom portion (51) of the exterior can. When the bottom portion (51) is viewed from the outside of the exterior can, at least a part of the welded portion, formed by a welding mark, of the lead and the bottom portion (51) is formed outside a concentric circle of the bottom portion (51) that has a diameter corresponding to the width of the lead.
Inventors:
YOKOO RYUNOSUKE
SHIMIZU KAZUMICHI
SHIMIZU KAZUMICHI
Application Number:
PCT/JP2019/005859
Publication Date:
October 03, 2019
Filing Date:
February 18, 2019
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
B23K26/02; H01M50/534; H01M50/536
Domestic Patent References:
| WO2010150458A1 | 2010-12-29 |
Foreign References:
| JPH09330697A | 1997-12-22 | |||
| JP2017107647A | 2017-06-15 | |||
| JP2012004074A | 2012-01-05 |
Attorney, Agent or Firm:
TOKUDA Yoshiaki et al. (JP)
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