Patent ID: 6232674
Filing Date: 2001-05-15
Classification: B60R,H02J,H02M,Y02T

Abstract:
A control device for a vehicle on-board electrical system having a power supply device including a generator (15) and at least two batteries (16, 18) chargeable by said generator and supplying power to at least a first consumer and a second consumer, the control device comprising a microcomputer (12), two end stages respectively including two field effect transistors (14a, 14b or 35, 37) which are connected to each other and each being connectable to a respective one of said two batteries, said two field effect transistors being switchable so as to establish connection between said batteries only under predetermined conditions; at least one further field effect transistor (23) coupled to said microcomputer; and two diodes (32, 33) each being coupled at one side thereof to a respective end stage and at another side thereof to said further field effect transistor, wherein said further field effect transistor switches the control device into operation by a control signal supplied thereto and a connection between said microcomputer and at least one of said batteries is established and wherein said control signal is dependent upon information obtained at a start of a vehicle.