Apparatus for controlling a charging start time and charging period for a storage battery in an electric vehicle to complete charging at a scheduled boarding time

摘要

An apparatus controls a charger for starting and stopping the charging of a storage battery of an electric vehicle at advantageous times based on relevant parameters. A necessary charging period is calculated on the basis of the amount of electric energy that is discharged from the storage battery at the time the charging of the storage battery is commanded by a charging start command key switch, and also on the basis of a predetermined charging current. A charging start time to finish the charging of the storage battery at a scheduled boarding time is calculated by a charging start time calculating circuit based on the calculated necessary charging period and the scheduled boarding time which is set by the driver by a scheduled boarding time setting key switch. The storage battery starts being charged with the predetermined charging current from the calculated charging start time. Therefore, the storage battery is prevented from being self-discharged when left to stand for a long period of time after it has been charged until the driver enters the electric vehicle, and any reduction in the temperature of the storage battery is minimized.