Cylindrical battery
US12424688B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 19, 2019 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Mar 15, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cylindrical battery wherein a central part of a sealing plate, fixed by swaging to an opening of an external packaging can, is configured to be warped toward the inner part of the battery. One embodiment is provided with: an electrode body in which a positive electrode plate and a negative electrode plate are rolled with a separator being disposed therebetween; an electrolytic solution; an external packaging can which has a bottomed cylindrical shape and which houses the electrode body and the electrolytic solution; and a sealing plate which is fixed by swaging to an opening of the external packaging can with a gasket therebetween. In the sealing plate, prior to the swage fixing, an outer peripheral edge to be fixed by swaging to the external packaging can is formed inclined so as to be directed to the inner part of the battery, toward radially outward.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.