Coulometer
US4323849A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Jan 11, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/423
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved coulometer is disclosed wherein a precision amplifier and integrator section provide to a logic section and a detector section a signal representative of charge provided to or from one or more storage batteries. When the integrator output reaches a predetermined threshold, the detector section causes a threshold signal to be generated which in turn generates a signal to reset the integrator and increment or decrement a counter. The output of the counter corresponds to ampere-hours of available charge and may be displayed as well as used to determine whether to continue charging or other control functions. Errors are minimized through the use of temperature compensation and fine adjustment circuits. In addition, alternate cycles of the input to the integrator logic are inverted to prevent errors due to offset voltages, drift and imbalance in detection circuits from being cumulative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.