US 11,699,834 B2
Sealed battery
Masayoshi Yoshida, Osaka (JP); Oose Okutani, Hyogo (JP); Takahiro Nogami, Osaka (JP); and Akira Takano, Osaka (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/418,956
Filed by SANYO Electric Co., Ltd., Daito (JP)
PCT Filed Jan. 16, 2020, PCT No. PCT/JP2020/001197
§ 371(c)(1), (2) Date Jun. 28, 2021,
PCT Pub. No. WO2020/149350, PCT Pub. Date Jul. 23, 2020.
Claims priority of application No. 2019-006677 (JP), filed on Jan. 18, 2019.
Prior Publication US 2022/0115756 A1, Apr. 14, 2022
Int. Cl. H01M 50/578 (2021.01); H01M 50/342 (2021.01); H01M 50/197 (2021.01); H01M 50/164 (2021.01); H01M 50/152 (2021.01); H01M 50/147 (2021.01); H01M 50/574 (2021.01); H01M 50/186 (2021.01); H01M 50/184 (2021.01)
CPC H01M 50/578 (2021.01) [H01M 50/147 (2021.01); H01M 50/152 (2021.01); H01M 50/164 (2021.01); H01M 50/184 (2021.01); H01M 50/186 (2021.01); H01M 50/197 (2021.01); H01M 50/342 (2021.01); H01M 50/574 (2021.01)] 5 Claims
OG exemplary drawing
 
1. A sealed battery, comprising:
a battery case including a bottomed tubular exterior can, and a sealing assembly sealing an opening of the exterior can;
a gasket arranged between the exterior can and the sealing assembly; and
an electrode assembly including an electrode lead and housed in the battery case, wherein
the sealing assembly includes a metal plate,
the metal plate includes:
a thin part formed into an annular shape;
a vent part that has a shape convex toward an inside of the battery case and is to invert so as to be convex toward an outside of the case when an internal pressure of the battery case reaches a predetermined inversion pressure R, the vent part enclosed by the thin part; and
an annular part that is positioned on an outside of the thin part and that the electrode lead is connected to, and
an elastic deformation part that comes into contact with an inner surface of the vent part and urges the vent part toward the outside of the battery case is provided in the gasket.