Battery powered electric vehicle and electrical supply system
First Claim
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1. In a battery powered electric vehicle, a system for controlling power transfer with a power distribution network for charging and discharging the battery when connected thereto comprising:
- power transfer means for passing electric power bi-directionally between the battery and the power distribution network;
communication means operatively coupled between the power distribution network and the power transfer means for providing control signals indicative of at least one of a selected power factor, power level and harmonics content to the power transfer means in accordance with the supply and demand on said power distribution network; and
control means responsive to the control signals and operatively coupled to the power transfer means for controlling the power passing between the battery and the power distribution network.
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Abstract
A charging system for a battery powered electric vehicle operates bidirectionally for charging the battery or for supplying power back to the utility grid at any selected power factor so that load leveling may be effected. A communications link between the utility and the charging system carries control signals and a control system associated with the charging system is responsive to the signals for controlling the charging rate and direction.
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Citations
26 Claims
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1. In a battery powered electric vehicle, a system for controlling power transfer with a power distribution network for charging and discharging the battery when connected thereto comprising:
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power transfer means for passing electric power bi-directionally between the battery and the power distribution network; communication means operatively coupled between the power distribution network and the power transfer means for providing control signals indicative of at least one of a selected power factor, power level and harmonics content to the power transfer means in accordance with the supply and demand on said power distribution network; and control means responsive to the control signals and operatively coupled to the power transfer means for controlling the power passing between the battery and the power distribution network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 23, 24)
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19. A system for controlling power transfer between a battery powered electric vehicle and a power distribution network comprising:
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power transfer means for passing electric power bi-directionally between the battery and the power distribution network for charging and discharging the battery; communication means operatively coupled between the power distribution network and the power transfer means for providing control signals of a selected vectorial relationship to the power transfer means in accordance with supply and demand on said power distribution network said vectorial relationship including at least one of a power level, power factor and harmonic content; and control means responsive to the control signals operatively coupled to the power transfer means for controlling the power passing between the battery and the power distribution network in accordance with said vectorial relationship. - View Dependent Claims (22)
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25. A charging system for controlling power transfer between a battery powered electric vehicle and a utility power grid subject to supply and demand comprising:
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circuit means on the vehicle for passing electric power between the battery and the power distribution network; communication means operatively associated with the power grid for providing control signals to the circuit means in accordance with the supply and demand on said power distribution network; and control means responsive to the control signals and operatively coupled to the power transfer means for controlling at least one of a power factor, power level and harmonics content of the power passing between the battery and the power distribution network.
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26. A system for charging a battery representing a sensible load from energy supplied by a power grid and for discharging the battery to supply energy back to the grid comprising:
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circuit means for bi-directionally passing power between the battery and the grid in accordance with supply and demand on said grid; control means operatively coupled to the circuit means for controlling charging and discharging of the battery in accordance with control signals selectively representing real and reactive components of the power to be transferred; and communication means between the power grid and the control means for carrying said control signals to said control means.
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Specification