METHOD AND DEVICE FOR DETERMINING A CHARGE STATUS OF A BATTERY USING A FLUXGATE SENSOR

摘要

The invention relates to a device and method for determining the charge status of a battery in a motor vehicle. The method according to the invention comprises the steps of charging a coil with a measurement voltage, cyclically reversing the polarity of the measurement voltage when the value of the secondary current flowing through the coil exceeds a predetermined threshold, scanning the secondary current, reconstructing the course of the secondary current based on the scanned secondary current values and determining the charge status on the basis of the course of the secondary current values.