Metal-air battery with environment control for intermittent high current demand
US4262062A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1980 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Mar 24, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M50/216
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An air/metal cell includes an internal gas-permeable membrane to restrict the transfer of oxygen from ambient atmosphere to the cathode, and incorporates an internal valve actuated by external force on the cell to open the valve and admit substantial quantities of oxygen for intermittent high current drain on the cell. Preferably the external force is provided by the same switching device which closes the electric circuit requiring the high current drain. The cell is specifically shown in the environment of a zinc/air cell powering a digital wristwatch. The high current mode of the cell is actuated by the pushbutton of the watch which turns on a miniature lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.