POWER SUPPLY SYSTEM, AND CONTROL METHOD AND CONTROL PROGRAM FOR THE SAME

• Main Author: FUKUDA HIDEO
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To implement an operation for equalizing degrees of deterioration of a plurality of storage batteries, without performing centralized control.SOLUTION: A power supply system 1 includes a power supply 10, a load 20, and three power storage devices 30a to 30c. Each of the power storage devices 30a to 30c includes a storage battery 31, a CPU 32, and a memory 33; and individually performs discharge control. Specifically, The CPU 32 in each of the power storage devices 30a to 30c acquires a SOH (State of health) of the storage battery 31; determines delay time on the basis of the acquired SOH and information (information showing correspondence between the storage battery 31's degree of deterioration and delay time) stored in the memory 33; and discharges electricity when the delay time has passed after detection of the load 20's consumption of power supplied from the power supply 10. Thereby, storage batteries 31 of the power storage devices 30a to 30c discharge electricity in order so that a storage battery 31 having low degree of deterioration preferentially discharges electricity.SELECTED DRAWING: Figure 1 【課題】集中制御を行うことなく、複数の蓄電池の劣化度が均等化するような運転を実現する。【解決手段】電源システム１は、電源１０、負荷２０、および、３つの蓄電装置３０ａ〜３０ｃを有する。各蓄電装置３０ａ〜３０ｃは、蓄電池３１、ＣＰＵ３２およびメモリ３３を有し、個別に放電制御を行う。具体的には、各蓄電装置３０ａ〜３０ｃにおいて、ＣＰＵ３２は、蓄電池３１のＳＯＨ（State of health）を取得し、取得したＳＯＨとメモリ３３に記憶された情報（蓄電池３１の劣化度と遅延時間との対応関係を示す情報）とに基づいて、遅延時間を決定し、電源１０から供給される電力の負荷２０による消費の検出が行われてから遅延時間が経過したときに、放電を行う。これにより、蓄電装置３０ａ〜３０ｃの蓄電池３１が順番に（劣化度が低い蓄電池３１が優先して）放電を行うことになる。【選択図】図１