Storage battery characteristic measuring device, DC power supply system, and storage battery characteristic measuring method

摘要

PPROBLEM TO BE SOLVED: To provide a high-reliability characteristic measuring device for a storage battery, a DC power supply system and a characteristic measuring device for a storage battery, which can stably perform deterioration determination regardless of the fluctuations in negative current, in deterioration decision test of a storage battery carried out, without having to separate the storage battery from the DC power supply system. PSOLUTION: The characteristic of a storage battery, the information of the storage battery voltage, in particular, can be used as a material for deterioration decision, by maintaining the discharge current of the storage battery at a constant value or optionally controlling the discharge current, without making the storage battery separate. For achieving this goal, the deterioration decision of the storage battery is carried out by controlling the discharge current of the storage battery constant or optionally. PCOPYRIGHT: (C)2009,JPO&INPIT