Patent ID: 11951871
Assignee: BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 0:
1. A multi-voltage storage system for an at least partially electrically driven vehicle, the multi-voltage storage system comprising:
a first storage module and a second storage module having an identical rated voltage for storing electrical energy, wherein on-board power system consumers are connected to the second storage module during a charging process,
a heating device for heating the storage modules,
a switching unit that is configured to connect the first storage module and the second storage module in series for the charging process and to connect them in parallel for driving the vehicle, and
a control unit that is firstly configured to actuate the switching unit at least one of before or during the charging process such that a parallel circuit of the first storage module and of the second storage module is broken, and that is secondly configured to activate the heating device at least one of before or during the charging process after the parallel circuit has been broken, wherein an electrical energy demand for the heating device is drawn from the first storage module.