Patent ID: 11923714
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC H

Claim 2:
3. A device for controlling a storage battery system, the storage battery system having a plurality of storage battery modules connected in series and each of the storage battery modules including a battery and a DC/DC converter connected to the battery, the device comprising:
a processor including processing circuitry configured to calculate state information on each of the batteries of the storage battery modules;
the processor further configured to calculate a power conversion efficiency of each of the DC/DC converters of the storage battery modules; and
the processor further selects one or a plurality of storage battery modules to be used while the storage battery system is charged or discharged and to determine a charge power or a discharge power of each of the selected one or plurality of storage battery modules, based on the state information of the batteries and the power conversion efficiencies of the DC/DC converters,
wherein the processor calculates a power conversion efficiency of the storage battery system while all of the storage battery modules are charged/discharged as a pre-selection charge/discharge efficiency, calculates a power conversion efficiency of the storage battery system while the selected one or plurality of storage battery modules are charged/discharged as a post-selection charge/discharge efficiency, and charges/discharges the selected one or plurality of storage battery modules if the post-selection charge/discharge efficiency is higher than the pre-selection charge/discharge efficiency.