POWER SYSTEM AND ITS MANAGEMENT METHOD

摘要

A power system comprising an electrochemical element, a load section, a generating section, and a charging/discharging section for the electrochemical element. The electrochemical element has a positive plate, a negative plate, and an electrolytic solution or a solid electrolyte. The charging/discharging curve of the electrochemical element has at least one step. A threshold of the voltage corresponding to the flection point or its neighborhood point at any one of the steps is set. The charging/discharging control section controls the charging/discharging of the electrochemical element so that the voltage of the electrochemical element may approach the threshold.