Energy supply arrangement for supplying an electrical consumer of a low-voltage electrical system of a motor vehicle, electrical system and method for operating an energy supply arrangement

摘要

The invention relates to an energy supply arrangement (13) with an output (40) for coupling to an electrical consumer (36), and a first and at least a second energy storage unit (B1, B2, B3, BN), which are connected in parallel to one another in a first operating state and provide a predetermined first supply voltage (U1) at the output (40). The energy supply arrangement (13) further comprises an input (38) for coupling to an energy source (32), a first switch unit (44) which, in a closed state, the first and the at least one second energy storage unit (B1, B2, B3, BN) couples in the first operating state to the input (38) and decouples in an open state from the input (38) in the second operating state, and a second switch unit (46) which, in the second operating state, the first and the at least one second energy storage unit (B1, B2, B3, BN) connects in series in order to provide a predetermined second larger supply voltage (U2) at the output (40) for supplying the electrical consumer (36).