CHARGING DEVICE FOR SECONDARY BATTERY AND CHARGING METHOD FOR SECONDARY BATTERY

摘要

A charging device includes charging power detection unit and full charge determination unit. The charging device further includes charging control unit adapted to repeatedly execute a additional charging control until the number of times of the full charge determination reaches a predetermined full charge determination count. The charging device further includes unit adapted to detect the temperature of the secondary battery, and full charge determination count setting unit adapted to set 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.

主权项

1. A charging device for secondary battery, comprising:
a charging power supply capable of outputting power for charging a secondary battery: a charging power detection unit adapted to detect power to be charged to the secondary battery by the charging power supply; a full charge determination unit adapted to make a full charge determination if chargeable power calculated based on a detection value of the charging power detection unit becomes equal to or less than predetermined power set in advance; a charging control unit adapted to execute 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 upon 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 full charge determination count which is a predetermined count; a temperature detection unit adapted to detect the temperature of the secondary battery; and a full charge determination count setting unit adapted to set the full charge determination count at least based on the temperature detected by the temperature detection unit when the full charge determination is made, wherein the full charge determination count setting unit setting a larger full charge determination count as the temperature detected by the temperature detection unit decreases.