Electrical cell charge energy measuring method and apparatus
US4181885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1978 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | May 10, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for measuring the charge energy available from electrochemical cells (batteries) of the type that exhibits a substantially constant discharge voltage characteristic over its charge life, such as zinc-silver oxide cells. Within several seconds following a brief period of shorting out for reactivation, two to four seconds in the case of zinc-silver oxide cells, short circuit current from the test cell flowing for a period of time just sufficient for complete charging of the internal capacitance of such test cell is sensed, integrated over such period, and used to control display of information as to the charge level of the cell under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.