Lithium secondary cell
US6521374B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1999 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Sep 1, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For use in lithium secondary cells, a positive electrode terminal 51 and a negative electrode terminal 81 are given an enhanced mechanical strength to improve the reliability of electrical connection between the cell and an external circuit, while the formation of oxide film on these terminals is inhibited to suppress the discharge voltage drop of the cell. To give these advantages to the lithium secondary cell embodying the invention, the positive electrode terminal 51 is formed from an aluminum alloy containing magnesium and silicon in a combined amount of at least 1.0 wt. % as additive elements, and the negative electrode terminal 81 is formed by plating a substrate of oxygen-free copper with nickel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.