Patent ID: 11862978
Assignee: PANASONIC ENERGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A control system for a power supply system in which a plurality of power supply units are parallel connected and in which charging and discharging of each of the power supply units is controlled, the control system comprising:
a power conditioner that is parallel connected to the plurality of power supply units and is connected to an external power system, and receives electric power from the power system and charges the plurality of power supply units with the received electric power, and receives electric power from the plurality of power supply units and discharges the received electric power to the power system;
a master controller that collects battery information having been output from each of the power supply units; and
a system controller that communicates to the power conditioner electric power required to the power supply system as a power command,
wherein the power conditioner causes charging and discharging of each of the power supply units within working individual power POB, based on possible total power SOPall at which all the power supply units are chargeable and dischargeable, the possible total power SOPall being determined from a possible individual power SOP, of each of the power supply units, determined based on the battery information detected on each of the power supply units, and
the working individual power POB being determined based on a power deviation indicating a difference of charging and discharging power between the power supply units,
wherein
a switch is provided in each of the power supply units and configured to switch connection and disconnection between the power supply unit and the control system,
each of the power supply units connected in parallel is connected via the corresponding switch to the control system including the power conditioner, such that the power supply units are directly connected in parallel without the control system therebetween where each switch establishes connection between the corresponding power supply unit and the control system,
the possible total power SOPall at which all the power supply units are chargeable and dischargeable is determined based on the possible individual power SOP of each of the power supply units and the power deviation, and
the working individual power POB for charging and discharging of each of the power supply units is determined so as not to exceed the possible individual power SOP of each of the power supply units.