Automobile onboard electrical network system has power diode and series switch element across DC/DC converter between electrical supply network and partial network containing safety relevant loads

摘要

The electrical network system has an electrical supply network and at least one partial network containing safety relevant electrical loads, both networks operated at the same voltage level with a DC/DC converter (23) between them. The DC/DC converter is bridged by a power diode (21) in series with a switch element (22), with at least one further switch element (24,25) in series with the parallel circuit. An Independent claim for a monitoring method for an onboard electrical network system is also included.