Sanyo Electric Co., Ltd.

Panasonic Energy Co., Ltd.

Shin Haraguchi

Kyosuke Miyata

Tomohiko Yokoyama

Oose Okutani

Hajime Nishino

Shinji Mino

Takayuki Shirane

Tomokazu Sada

Koji Funami

Tomoki Tsuji

Ryota Okimoto

The purpose of the present disclosure is to provide a cylindrical battery in which a short circuit between an outer can and a sealing body can be suppressed. In a cylindrical battery () according to an embodiment of the present disclosure, a gasket () includes an extension part () extending from between a sealing body () and a tip () on a radially inward side of a shoulder () of an outer can (). The extension part () is arranged so that the gasket () intersects any straight lines connecting an upper surface () of the shoulder () opposite to the electrode body side in the axial direction and an upper surface () of an inner portion () opposite to the electrode body side in the axial direction, the inner portion () being located radially inward of the shoulder () in the sealing body ().

Cylindrical battery

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.

Gasket and cylindrical battery

A cylindrical battery with an electrode assembly, an electrolytic solution, a bottomed cylindrical exterior case accommodating the electrode assembly and the electrolytic solution, and a sealing unit fixed by crimping of an open end portion of the exterior case via a gasket. The sealing unit includes a valve member which has a protrudent portion that is annular in plan view, an insulating plate which is fitted within the inner periphery of the protrudent portion and which has an outer peripheral skirt portion, and a metal plate which is fixed within the inner periphery of the skirt portion of the insulating plate and which is connected to a central portion of the valve member. The tip of the protrudent portion is located at a level which does not reach the level of a second surface portion of the metal plate in the direction of thickness of the sealing unit.

Cylindrical batteries

A cylindrical battery according to an embodiment of the present invention includes an electrode body, an electrolyte solution, a tubular exterior can that accommodates the electrode body and the electrolyte solution, and a sealing body that is crimped on an opening portion of the exterior can. The sealing body includes a current interrupt mechanism in which a valve member and a metal plate are joined to each other with an insulating plate that includes a circular hollow portion interposed therebetween. The metal plate includes a thin portion that has a circular shape or a C-shape. The hollow portion and the thin portion are concentric with each other when viewed from a direction perpendicular to the metal plate. D/Dis no less than 0.56 and no more than 1 where Dis the diameter of the thin portion, and Dis the diameter of the hollow portion.

A cylindrical battery according to an embodiment of the present invention includes an electrode body, an electrolyte solution, a tubular exterior can that has a bottom and that accommodates the electrode body and the electrolyte solution, and a sealing body that seals the exterior can. The sealing body includes a valve member, an insulating plate that includes a hollow portion, and a metal plate that has a first through-hole. The insulating plate is disposed between the valve member and the metal plate. At least one of the valve member and the metal plate includes a projection that projects toward an inside of the hollow portion. The valve member and the metal plate are joined to each other at the projection. The insulating plate has a second through-hole that is formed around the hollow portion.

A battery includes a power generation component including a positive electrode, a negative electrode, and an electrolyte, and a battery case accommodating the power generation component. The negative electrode includes a first lead () having a single layer structure whose main component is nickel, and a second lead () having a layered structure including a Ni layer () whose main component is nickel and a Cu layer () whose main component is copper. The battery includes a layered portion () formed of the leads that are superposed such that the Ni layer () of the second lead () faces the first lead (). Part of the layered portion () is welded to an inner surface of the battery case with the first lead () at the layered portion () being disposed on a battery case side.

Battery and method of manufacturing battery

A battery case includes a case main body (), a sealing body that seals an opening of the main body, and an insulating body () that is disposed at a part where the case body () and the sealing body are in contact with each other. In the battery case, an open end () of the case body () is crimped to the sealing body, and a dent () is formed in the sealing body by pressing the open end () against the sealing body.

Battery case and battery

A laminated battery provided with an electricity-producing element and an outer case. The electricity-producing element contains a positive electrode, a negative electrode, and an electrolyte. The outer case comprises two sheets of laminating film and includes the following: a containing section that contains the electricity-producing element; and a sealing section that is formed around the edge of the containing section by bonding the sheets of laminating film to each other. Corners are formed along the boundary between the containing section and the sealing section, and an adhesive resin layer in the sealing section is thicker in corner regions near the aforementioned corners than in other regions.

Growing community of inventors

Hyogo, Japan

Shin Haraguchi