Method for determining capacity of lead-acid batteries of various specific gravities
US7471090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2005 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Mar 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/367
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In accordance with various embodiments, there is a method for determining the capacity of a battery. Various embodiments include applying a predetermined current ramp to a fully charged lead-acid battery while measuring a battery terminal voltage. An Iup can be determined, where the Iup is a transition from charging to overcharging. A specific gravity of the lead-acid battery can also be determined. The capacity of the lead-acid battery can then be determined from the Iup using a correlation function that describes the relationship of the Iup to the capacity, where the correlation function depends on the specific gravity of the lead-acid battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.