Patent · US Expired

Batterey discharge characteristics calculation method and remaining battery capacity measuring device

US5592094A · kind A · utility

141Cited by
6References
7Claims
0Family size

Assignee

Inventor

Key dates

Filing dateNov 24, 1995
Grant dateJan 7, 1997
Priority date
Expiry dateNov 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.