Vb Autobatterie Gmbh

Helmut Laig-H&ouml;rstebrock

Eberhard Meissner

Gerolf Richter

Detief Brunn

Dieter &Uuml;bermeier

Karl-Heinz Leiblein

Method for determining the state of charge of lead-acid rechargeable batteries

The invention relates to a method for determining the state of charge and loading capacity of an electrical storage battery by measuring current, voltage and temperature and comparing the measured values with the corresponding values for the response of an equivalent circuit diagram of the storage battery, the parameters of the components in the equivalent circuit diagram and the state variables being varied such that the measured values are matched and that the state of charge and loading capacity are determined from the adjusted parameters and state variables determined.

Method for determining the state of charge and loading capacity of an electrical storage battery

A method for determining the starting ability of the starter battery in a motor vehicle. The current and voltage of the storage battery are measured before starting is begun, shortly after starting is begun and at short intervals of time during the starting procedure. The current/voltage value pairs for each instant are used to calculate a resistance value and the quantity of charge drawn from the storage battery, and the rate of rise in the resistance values as a function of the quantity of charge drawn is used to derive a measure of the availability of the storage battery during the starting procedure. In particular, the gradient &Dgr;RQ of the internal resistance as a function of the quantity of charge drawn and the turn-on internal resistance R,are stored in an arithmetical memory as a field as a function of the charge state or of the equivalent no-load voltage (U,) and the battery temperature and are compared with already recorded values or typical normal values.

Method for determining the starting ability of a starter battery in a motor vehicle

Growing community of inventors

Frankfurt-am-Main, Germany

Helmut Laig-Hörstebrock

Growing community of inventors

Frankfurt-am-Main, Germany

Helmut Laig-H&ouml;rstebrock

Helmut Laig-Hörstebrock