BATTERY PACK STATUS MEASURING DEVICE, BATTERY PACK DETERIORATION DETERMINING METHOD, AND BATTERY PACK DETERIORATION DETERMINING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To easily determine deterioration of a battery pack while securing determination precision of deterioration of the battery pack used as an emergency power supply facility. PSOLUTION: As for a battery pack status measuring device 7, voltages of respective unit batteries constituting the battery pack 3 are periodically measured at every prescribed time after detecting discharge of the battery pack 3, voltage values of the respective unit batteries in the battery pack 3 in discharging at the same time are classified according to preset partitions, points are imparted to these partitions, and the points are also imparted by means that appearance frequency is divided of deviation of the measurement voltage, and by means that the points decided by the distribution and the appearance frequency of the deviation of the measurement voltage are comprehensively evaluated regarding the all unit batteries constituting the battery pack 3, the deterioration state of the whole battery pack 3 is determined. PCOPYRIGHT: (C)2008,JPO&INPIT