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
First Claim
1. An apparatus for controlling a charger for charging a storage battery for use on an electric vehicle, comprising, scheduled boarding time indicating means for indicating a scheduled boarding time, charging commanding means for commanding charging of the storage battery, charging period calculating means for calculating a necessary charging period based on an amount of electric energy discharged from the storage battery when charging of the storage battery is commanded and a predetermined charging current, charging start time calculating means for calculating a charging start time to finish the charging of the storage battery at the indicated scheduled boarding time based on said indicated scheduled boarding time and the calculated necessary charging period, and charging starting means for starting the charging of the storage battery with said predetermined charging current the calculated charging start time.
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Abstract
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.
94 Citations
15 Claims
- 1. An apparatus for controlling a charger for charging a storage battery for use on an electric vehicle, comprising, scheduled boarding time indicating means for indicating a scheduled boarding time, charging commanding means for commanding charging of the storage battery, charging period calculating means for calculating a necessary charging period based on an amount of electric energy discharged from the storage battery when charging of the storage battery is commanded and a predetermined charging current, charging start time calculating means for calculating a charging start time to finish the charging of the storage battery at the indicated scheduled boarding time based on said indicated scheduled boarding time and the calculated necessary charging period, and charging starting means for starting the charging of the storage battery with said predetermined charging current the calculated charging start time.
- 9. An apparatus for controlling a charger for charging a storage battery for use on an electric vehicle, comprising scheduled boarding time indicating means for indicating a scheduled boarding time, charging commanding means for commanding charging of the storage battery, memory means for storing a charging period based on an amount of electric energy discharged from the storage battery and a voltage of a power supply supplied to the charger, charging period calculating means for calculating a necessary charging period based on a charging period read from said memory means by referring to the amount of electric energy discharged from the storage battery and the voltage of the power supply supplied to the charger, charging start time calculating means for calculating a charging start time to finish the charging of the storage battery at the indicated scheduled boarding time based on said indicated scheduled boarding time and the calculated necessary charging period, and charging starting means for starting the charging of the storage battery with a predetermined charging current based on the voltage of the power supply at the calculated charging start time.
- 12. An apparatus for controlling a charger for charging a storage battery on an electric vehicle, comprising, scheduled boarding time indicating means for a vehicle user to indicate a scheduled boarding time, charging commanding means for commanding charging of the storage battery, means for measuring an amount of electric energy discharged from the storage battery, charging period calculating means for calculating a necessary charging period based on said amount of electric energy discharged from the storage battery when charging of the storage battery is commanded by said charging commanding means, charging start time calculating means for calculating a charging start time for finishing the charging of the storage battery at the indicated scheduled boarding time, and means for starting the charging of the storage battery at the calculated charging start time.
Specification