Monitoring device and method for determining at least one characteristic variable for the state of a battery

US7423408B2 · kind B2 · utility

Assignee

• VB Autobatterie GmbH · DE

Inventors

• Ingo Koch · Hameln, DE
• Helmut Laig-Hoerstebrock · Frankfurt, DE
• Eberhard Meissner · Hofheim, DE
• Ursula Teutsch · Bad Soden, DE

Key dates

• Filing date: Feb 17, 2005
• Grant date: Sep 9, 2008
• Expiry date: Oct 10, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/367
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining at least one characteristic variable for the state of a battery includes: (a) determining the charge throughput of the battery per time step; having, (b) determining a first characteristic figure in order to describe the stratification of the electrolyte concentration in the battery on the basis of a defined initial state for an as-new battery, and of a second characteristic figure in order to describe the stratification of the state of charge in the battery on the basis of a defined initial value for an as-new battery during operation of the battery, in which (c) in each time step, the first characteristic figure and the second characteristic figure are adapted as a function of the charge throughput from the instantaneous state of the battery, and at least one characteristic variable is determined from the first and the second characteristic figure.