Alkaline cell
US4144382A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The active cathode material of an alkaline cell is a mixture of monovalent silver oxide and graphite or a compound of which the main ingredient is divalent silver oxide. The active anode material is powdered mercury-indium-zinc alloy mixed with a suitable binder and pressed into formed or gelled state. After almost all of the zinc of the anode material is exhausted during the course of discharge of the cell, a small quantity of indium acts as the anode active material so as to continue to supply current for a period of time but at lower voltage. By detecting the voltage drop, it can be determined that the cell is approaching the end of its useful life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.