US 12,142,773 B2
Gasket and cylindrical battery
Ryota Okimoto, Osaka (JP); Oose Okutani, Hyogo (JP); and Shin Haraguchi, Hyogo (JP)
Assigned to PANASONIC ENERGY CO., LTD., Osaka (JP)
Appl. No. 17/417,255
Filed by SANYO Electric Co., Ltd., Daito (JP)
PCT Filed Dec. 11, 2019, PCT No. PCT/JP2019/048469
§ 371(c)(1), (2) Date Jun. 22, 2021,
PCT Pub. No. WO2020/137547, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-247177 (JP), filed on Dec. 28, 2018.
Prior Publication US 2022/0069392 A1, Mar. 3, 2022
Int. Cl. H01M 50/107 (2021.01); H01M 10/0587 (2010.01); H01M 50/152 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01)
CPC H01M 50/107 (2021.01) [H01M 10/0587 (2013.01); H01M 50/152 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A gasket of a cylindrical battery comprising:
a cylindrical portion; and
an annular portion that extends inward in a radial direction from one end of the cylindrical portion in the axial direction, wherein
a surface of the annular portion on a side opposite to the cylindrical portion in the axial direction is a substantially flat surface,
a projection that is disposed at an interval in the radial direction from each of the cylindrical portion and an inner end of the annular portion in the radial direction, and projects in the axial direction is provided on the annular portion on a side of the cylindrical portion in the axial direction, and
a thickness of an outward portion of the annular portion in the axial direction, the outward portion being located on an outward side in the radial direction with respect to the projection, is larger than a thickness of an inward portion of the annular portion in the axial direction, the inward portion being located on an inward side in the radial direction with respect to the projection.