Temperature compensation in recharging of batteries
US7589491B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2006 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Jan 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/007194
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Temperature compensation methods and equipment for charging electric storage batteries are described. Control over battery charging includes measurement of battery temperature at the commencement of a charging event, and use of inflection analysis of a charger voltage-time curve to detect the attainment of a distinctive signal point in the event. To compensate for the variations with initial battery temperature on the relation of the signal point to a different battery condition of interest, control of a charging event includes use of the measured battery temperature to obtain from a controller memory information about the applicable values of process parameters pertinent to those temperature-variable process factors. The temperature of a battery charger which includes such controls preferably is used as a workable approximation to battery temperature, so that batteries of conventional construction can benefit from use of the disclosed methods and equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.