On-board electrical supply system has charging and discharging device that periodically discharges second energy storage device and determines its voltage-current characteristic

摘要

The system has a first energy storage device (10) charged by a generator (12) and connected to a first load (16) normally used if an ignition switch (30) is on, a second storage device (20) and an arrangement (4) for controlling charging and discharging of the second storage device based on the states of the first storage device and generator. The charging and discharging device periodically discharges second storage device and determines its voltage-current characteristic.