Method and apparatus for measuring battery capacity using voltage response signal based on pulse current
US6118275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring battery capacity using a voltage response signal based on a pulse current, where the method includes the steps of: measuring a voltage response signal based on a pulse current signal applied to a primary or secondary battery; performing an approximation of the measured voltage response signal to an equivalent circuit model composed of resistors, capacitors and transmission lines to determine the model parameters; and determining the unknown battery capacity from the voltage response characteristics based on a correlation between the measured capacity and the model parameters, which correlation is previously determined by a real-time discharge method, thereby takes a shorter time than a real-time discharge method and delivering efficiency and reliability in determining model parameters of an equivalent circuit which are in close correlation with the charge/discharge condition of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.