DEVICES AND/OR METHODS FOR DETERMINING THE AVAILABILITY OF ELECTRIC ENERGY, PARTICULARLY IN VEHICLE ELECTRIC SYSTEMS COMPRISING SEVERAL ENERGY ACCUMULATORS

摘要

The invention relates to devices and/or methods for determining the availability of electric energy in two-energy accumulator vehicle electric systems, in which both energy accumulators, particularly batteries, can be connected to one another via a D.C. converter. The required electric energy is generated by means of a generator that is driven by a vehicle engine. The customary consumers are connected to a first consumer battery circuit (10, 24). Additional consumers, for example, high-current consumers, particularly the starter, are connected to the second battery circuit (11, 29). A control device, for example, a controller that is equipped with a microprocessor determines the availability of the electric energy and occurring faults while evaluating different algorithms and takes over the necessary controls and signalings. The algorithms include threshold value statements for providing the electric energy (SOCS) and threshold value statements for identifying the system faults (SOHS).