Method and system for determining the capacity of a battery
US6515454B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Feb 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for estimating the capacity of a battery, including the following steps: estimation of a steady-state voltage UR, an internal resistance R1 and an internal voltage drop UK of the battery, caused by a density difference in the battery acid; initialization of a model describing the battery in order to estimate the capacity, using estimated values UR, R1 and UK; stimulation of the initialized model with predefined load current characteristic IBatt,stim, in particular a simulated load current characteristic of a consumer in operative connection with the battery, in order to obtain a voltage response UBatt,pred of the model, representing the battery voltage given the predefined load current characteristic; comparison of the voltage response UBatt,pred of the model with a predefinable, minimal battery voltage UBatt,limit, and estimation of the capacity of the battery by comparing UBatt,pred and Ubatt,limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.