US 12,224,445 B2
Cylindrical battery
Shin Haraguchi, Hyogo (JP); and Oose Okutani, Hyogo (JP)
Assigned to PANASONIC ENERGY CO., LTD., Osaka (JP)
Appl. No. 17/414,530
Filed by SANYO Electric Co., Ltd., Daito (JP)
PCT Filed Dec. 2, 2019, PCT No. PCT/JP2019/047085
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/137373, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-244990 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0052406 A1, Feb. 17, 2022
Int. Cl. H01M 50/184 (2021.01); H01M 10/0525 (2010.01); H01M 10/0587 (2010.01); H01M 50/107 (2021.01); H01M 50/147 (2021.01); H01M 50/186 (2021.01)
CPC H01M 50/107 (2021.01) [H01M 10/0525 (2013.01); H01M 10/0587 (2013.01); H01M 50/147 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A cylindrical battery comprising:
an electrode assembly in which a positive electrode and a negative electrode are wound via a separator;
an electrolyte;
an exterior can having an opening at one end thereof in an axial direction, the exterior can including:
a bottomed cylindrical portion that houses the electrode assembly and the electrolyte, and
an annular shoulder portion that is bent directly from an end of the bottomed cylindrical portion on an opening side, such that the annular shoulder portion extends from the end of the bottomed cylindrical portion to a tip of the annular shoulder portion facing the opening of the exterior can in a radial direction; and
a sealing assembly caulked and fixed to the annular shoulder portion via a gasket, wherein
the gasket includes an extending portion that extends from between the tip of the shoulder portion and the sealing assembly, and
the gasket intersects with all straight lines connecting a first surface and a second surface,
the first surface represents an entire surface of the annular shoulder portion which faces away from the electrode assembly in the axial direction, and is defined between the end of the bottomed cylindrical portion and the tip of the annular shoulder portion in the radial direction, and
the second surface represents an entire surface of the sealing assembly which faces away from the electrode assembly in the axial direction, and is defined by an outermost circumference of the sealing assembly in the radial direction.