Time controlled battery charger
First Claim
1. In an on-board charger for an electric vehicle, the vehicle having a propulsion battery, a propulsion motor, a power converter for controlling power from the battery to the motor and a charger for charging the battery, the improvement comprising, a stable oscillator for producing a clock signal, counter means responsive to said clock signal for producing a time of day output signal, means operative on said counter means for selecting the time of day at which said time of day output signal is produced, means responsive to the time of day signal for initiating a charging cycle at the preselected time of day, and means controlling at least a portion of said charging cycle in response to time signals produced by said clock.
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Accused Products
Abstract
In a charger for the battery of an electric vehicle, a stable time of day clock is provided to initiate charging at a preselected time of day, and to control at least a portion of the charge cycle. The clock can be set in accordance with the schedule established for the vehicle so that charging will be accomplished automatically during the scheduled time of day when the vehicle is not in use. In the case of a fleet of such vehicles, at the termination of use, each driver simply parks the vehicle and connects an AC power line; charging for each vehicle will be initiated as determined by the clock associated therewith. An indicating system is provided to advise the driver that power has been properly connected and charging will commence at the appropriate time.
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Citations
12 Claims
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1. In an on-board charger for an electric vehicle, the vehicle having a propulsion battery, a propulsion motor, a power converter for controlling power from the battery to the motor and a charger for charging the battery, the improvement comprising, a stable oscillator for producing a clock signal, counter means responsive to said clock signal for producing a time of day output signal, means operative on said counter means for selecting the time of day at which said time of day output signal is produced, means responsive to the time of day signal for initiating a charging cycle at the preselected time of day, and means controlling at least a portion of said charging cycle in response to time signals produced by said clock.
- 2. In an on-board charger for an electric vehicle, the vehicle having a propulsion motor, a propulsion battery, a power converter for controlling power from the battery to the motor, and a charger for charging said battery, the improvement comprising, a stable oscillator for producing precise timing pulses, a counter responsive to said oscillator and having a period related to day length, adjusting means for said counter for causing said counter to produce a time of day output signal at a preselected time of day, and means responsive to said time of day signal for initiating a charging cycle.
Specification