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

Claim 2:
3. A method for operating a multi-voltage storage system for an at least partially electrically driven vehicle, the method comprising:
providing a first storage module and a second storage module having an identical rated voltage for storing electrical energy,
connecting on-board power system consumers to the second storage module during a charging process,
heating the storage modules by way of a heating device,
providing a switching unit by way of which the first storage module and the second storage module are connected in series for the charging process and are connected in parallel for driving the vehicle,
providing a control unit by way of which firstly the switching unit is actuated 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 by way of which secondly the heating device is activated at least one before or during the charging process after the parallel circuit has been broken, and
drawing an electrical energy demand for the heating device from the first storage module.