DISCHARGING OF A PLURALITY OF SECONDARY CELLS AND BATTERY

摘要

PROBLEM TO BE SOLVED: To increase total output by preventing generation of overdischarge in any of secondary cells without using auxiliary cells. SOLUTION: This discharging method performs discharging by connecting a plurality of secondary cells 1 in series. By detecting the remaining capacity of respective discharged secondary cells 1, a plurality of secondary cells 1 connected in series are discharged, while the cell voltage obtained by stepping down the voltage outputted a plurality of secondary cells 1 connected in series is being supplied to the small-capacity secondary cell 1.