Motor vehicle battery diagnosis method, involves characterizing motor vehicle battery as defective, if amplitude of battery power e.g. charging power or discharging power, falls below given power threshold value

摘要

The method involves increasing or decreasing a reference voltage (UG) of a generator (2) during dropping of a power threshold value. Battery power (IB) is measured again as a charging power or a discharging power of a motor vehicle battery (3). The motor vehicle battery is characterized as defective if the amplitude of the battery power e.g. charging power or the discharging power, falls below a given power threshold value.