Cylindrical electric cell
US4237199A · kind A · utility
6Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Dec 31, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M4/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a cylindrical electric cell in which the negative electrode (8) is a sheet of lithium wound round a current collector (1) which is elastically deformable and is in the form of a cylinder whose directrix is a substantially circular curve with two distinct ends. In accordance with the invention, the two portions of cylinder close to said ends are cut into matching shapes so that they fit into each other, the protruding parts (2) of one portion being accomodated in the recessed parts (3) of the other portion. Application to electric cells whose positive active material is liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.