DEVICE FOR CHARGING SECONDARY CELL AND METHOD FOR CHARGING SECONDARY CELL

摘要

A charging device includes charging power detection means for detecting power to be charged to a secondary battery by a charging power supply and full charge determination means for making a full charge determination when chargeable power calculated based on a detection value of the charging power detection means becomes equal to or less than predetermined power set in advance. The charging device further includes charging control means for repeatedly executing a charging control of supplying power to the secondary battery from the charging power supply until the full charge determination is made, stopping the supply of power to the secondary battery from the charging power supply when the full charge determination is made, resuming the supply of power after the elapse of a predetermined time after the supply of power is stopped and continuing the supply of power until the full charge determination is made again until the number of times of the full charge determination reaches a predetermined full charge determination count. The charging device further includes means for detecting the temperature of the secondary battery, and full charge determination count setting means for setting a larger full charge determination count as the temperature decreases at least based on the temperature of the secondary battery when the full charge determination is made.