Cylindrical batteries
US11251458B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2018 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Feb 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2200/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.