Gasket and cylindrical battery
AssigneeSanyo Electric Co., Ltd.
InventorsRyota Okimoto, Oose Okutani, Shin Haraguchi
Life of this patent
Estimating the term…
Abstract
A gasket of a cylindrical battery according to an embodiment of the present disclosure comprises a cylindrical part, and a ring part which extends from one end part of the cylindrical part in the axial direction toward an inner side thereof in the radial direction. A surface of the ring part which is opposite the cylindrical part side in the axial direction has, an approximately flat surface, A protrusion is provided on the side of the ring part which is toward the cylindrical part in the axial direction. Said protrusion: is positioned with gaps in the radial direction in relation to both the cylindrical part and an inner end of the ring part in the radial direction; and protrudes in the axial direction.
Claims5
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, and
- 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.
A cylindrical battery comprising:
- an electrode assembly in which a positive electrode and a negative electrode are wound via a separator;
- an electrolyte;
- a bottomed cylindrical exterior can that houses the electrode assembly and the electrolyte;
- a sealing assembly;
- and
- an annular gasket interposed between the exterior can and the sealing assembly, wherein
- the exterior can has an annular groove that extends in a circumferential direction on an outer circumferential surface, and projects to the inward side in the radial direction, and a projecting portion that projects to the inward side in the radial direction of the annular groove,
- the gasket includes a covering portion that covers at least a part of an inner side portion of the projecting portion in the radial direction, and a support portion that supports a surface of the sealing assembly on a side of a bottom of the exterior can in an axial direction,
- the covering portion inclines so as to go inward in the radial direction toward the bottom in the axial direction, and
- the support portion includes a projection having a tip in contact with the sealing assembly.
Dependencies are inferred from the claim text.