Method and apparatus for predicting the available energy of a battery
US6618681B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | May 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/379
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of predicting by non-invasive testing the available energy of a battery at any state of charge by acquiring data of the parameters of internal resistance (IR), open circuit voltage (OCV) and temperature (T), the points of voltage and current of the slope on a positive current ramp of Vup and Iup at the transition from charge to overcharge and on a negative current ramp of Vdn and Idn at the transition from overcharge to charge for a plurality of batteries. Next an algorithm in the form of a linear equation is developed using this data. The available energy of a battery under test is predicted by acquiring from it the numerical data values of these parameters and applying them to the algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.