Integrated circuit monitor for storage battery voltage and temperature
US5339018A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Nov 17, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for monitoring voltage as a function of temperature of a storage battery and an apparatus for controlling the charging voltage of the battery based on battery temperature, voltage, and charging system loads. The battery monitoring apparatus includes a comparator for comparing, at any temperature in the working temperature range of the battery, the actual battery voltage with a reference battery voltage. The reference battery voltage is the voltage gassing curve for the storage battery. The comparator is given a temperature coefficient provided by a temperature-sensitive band-gap voltage reference. A plurality of the temperature-sensitive band-gap reference cells may be connected together in order to accurately track any differently sloped battery gassing voltage curve. An apparatus for controlling charging voltage of the storage battery is also provided, which includes a comparator for comparing, at any temperature in a predetermined range, the actual charging voltage with a reference charging voltage. The reference charging voltage curve is a function of charging system component temperatures and electrical system loads. A plurality of comparators may be connected tog…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.