Patent · US Active

Method for determining the internal resistance of a battery

US7902793B2 · kind B2 · utility

1Cited by

11References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Bernd Frey · Tauberbischofsheim, DE
Burkhard Iske · Weil der Stadt, DE

Key dates

Filing date	Nov 16, 2005
Grant date	Mar 8, 2011
Priority date	—
Expiry date	Sep 4, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/389
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for determining the internal resistance of a battery, in particular a lead-acid vehicle battery, and an associated device for performing the method are described, in which differential values are calculated from the measured values for the voltage and the current, and these differential values are processed with the aid of a regulator, such as an integrator or a PID regulator. A signal results at the output of the regulator, which corresponds to the reciprocal value of the internal resistance of the battery. This signal is taken into consideration again in each following computing step. The functional capability may be inferred from its internal resistance.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.