Nickel-metal hydride battery
US8119284B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2007 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Dec 20, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nickel-metal hydride battery that reduces the amount of cobalt and improves battery durability. The battery includes a negative electrode formed from an AB5 hydrogen-absorbing alloy. The alloy includes an A element composed of Misch metal and a B element mainly composed of nickel. The nickel in the B element is partially replaced by at least one further element including cobalt. The alloy is formed to satisfy at least the conditions of a mol ratio of the B element relative to the A element being 5.25 or greater, the amount of cobalt for 1 mol of the A element being 0.15 mol to 0.25 mol, and the alloy having a half-width ratio, which indicates the ratio of a peak half-width of a (002) plane relative to a peak half-width of a (200) plane, of 1.3 to 1.7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.