Batterey discharge characteristics calculation method and remaining battery capacity measuring device
US5592094A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1995 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Nov 24, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a device for determining the battery discharge characteristics and estimating the remaining battery capacity easily by a simple mechanism even if time elapses. A discharge characteristics calculation section reads voltage, current, and temperature from a voltage sensor, a current sensor, and a temperature sensor, respectively, and determines the approximated discharge characteristics at a given time based on a position relationship of the discharge characteristics curved surface function V=a.multidot.log(H.sub.0 -H)+b.multidot.H+c to voltage-temperature-duration of discharge axes. A duration of discharge characteristics calculation section determines the duration of discharge from a fully charged state to the present based on the approximated discharge characteristics. A remaining capacity calculation section determines the remaining capacity based on the approximated discharge characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.