Battery charge indicator such as for an implantable medical device
US6940255B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2003 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Jan 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This document discusses, among other things, a system providing a battery charge indicator for an implantable medical device, such as using a lithium/carbon monofluoride (CFx) or other battery. Capacity vs. voltage data from a separate characterizing battery into a characterizing load impedance is stored in memory, such as in a lookup table or as a regression equation fitted to the data. For the actual battery of interest, then, a battery terminal voltage and a corresponding load current are measured, and a load impedance is calculated. A translation is performed to make the measured battery voltage and the characterizing capacity vs. voltage data comparable, so that a capacity reading can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.