Sealed batteries with zinc electrode
US5143799A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1992 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Jan 21, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sealed rechargeable nickel-zinc or silver-zinc electrochemical cell including two compartments, one having a zinc electrode and a first hydrogen electrode and the other having a nickel or silver electrode and a second hydrogen electrode electrically connected to the first hydrogen electrode. The two compartments share a common gas space. During discharge the cell acts as a conventional nickel-zinc or silver-zinc electrochemical cell. During charging the gases evolved are immediately internally consumed, allowing the entire cell to be sealed. Furthermore, when the cell is fully charged there is a noticeable voltage jump which serves as a clear indication that the cell is fully charged and helps prevent overcharging and its detrimental effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.