US 12,469,924 B2
Secondary battery, electronic device, and power tool
Kunio Sodeyama, Kyoto (JP); and Masafumi Umekawa, Kyoto (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed by MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed on Dec. 28, 2022, as Appl. No. 18/090,006.
Application 18/090,006 is a continuation of application No. PCT/JP2021/033151, filed on Sep. 9, 2021.
Claims priority of application No. 2020-163163 (JP), filed on Sep. 29, 2020.
Prior Publication US 2023/0140258 A1, May 4, 2023
Int. Cl. H01M 50/342 (2021.01); H01M 10/0525 (2010.01); H01M 10/0587 (2010.01); H01M 50/159 (2021.01)
CPC H01M 50/342 (2021.01) [H01M 10/0525 (2013.01); H01M 10/0587 (2013.01); H01M 50/159 (2021.01); H01M 2220/30 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
an electrode winding body in which a strip-shaped positive electrode and a strip-shaped negative electrode are stacked with a separator interposed between the strip-shaped positive electrode and the strip-shaped negative electrode and wound;
an electrolytic solution; and
a battery can that houses the electrode winding body and the electrolytic solution, the battery can having an opening hermetically sealed by a safety valve mechanism and a battery lid with a gasket interposed therebetween,
wherein
the battery lid includes a terminal portion and a flange portion, and
a metal layer is included between an outer main surface of among main surfaces of the flange portion and the gasket,
wherein the metal layer is a disk-shaped metal member having a through hole.