ENERGY MANAGEMENT UNIT FOR A MOTOR VEHICLE ELECTRICAL NETWORK INCORPORATING MULTIPLE ENERGY STORAGE UNITS, AND ELECTRICAL NETWORK INCORPORATING SUCH AN ENERGY MANAGEMENT UNIT

摘要

The energy management unit controls connection between an alternator, a high power circuit and a low power circuit, to allow energy delivery from the appropriate source, and emergency connection to the other source. The energy management unit (6) is connected to a network (II) of high power electrical loads (7) operating during starting of the vehicle, a network (I) combining the high power battery (1) and loads (4) that draw high current for a short time, and a network (III) with a second low power battery (2) and low current loads (5). The alternator (3) is connected into the low power network (III), and the starter motor (D) is connected into the high power network (I). The controller switches power between the three networks so full power is available for starting, or to exchange power between the three networks.