Stand-off charging for batteries
First Claim
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1. A method for providing power to a remote device, comprising:
- providing a pulsed laser having an off-state at a location remote from the remote device;
providing a storage battery in electrical communication with the device;
providing a photovoltaic receiver;
intermittently illuminating said photovoltaic receiver with said pulsed laser;
providing an intermediate charge receiving circuit in direct electrical communication with the photovoltaic receiver;
charging said intermediate charge receiving circuit with energy obtained from said photovoltaic receiver as a result of said intermittent illuminating;
measuring a voltage drop across said intermediate charge receiving circuit and said storage battery with a feedback circuit; and
,synchronizing said measuring step with said intermittent illuminating step so that say measuring step occurs during said off-state of said laser.
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Abstract
Power is provided to a remote device by receiving external energy from a laser source and storing the energy in a storage battery. A photovoltaic receiver capable of alignment in a preferred reception direction for receiving energy is used to receive energy from a source of excitement energy, and is configured to receive energy from a laser which is directed to the photovoltaic receiver. A charging circuit receives power from the photovoltaic receiver and is used to charge the storage battery.
13 Citations
1 Claim
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1. A method for providing power to a remote device, comprising:
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providing a pulsed laser having an off-state at a location remote from the remote device; providing a storage battery in electrical communication with the device; providing a photovoltaic receiver; intermittently illuminating said photovoltaic receiver with said pulsed laser; providing an intermediate charge receiving circuit in direct electrical communication with the photovoltaic receiver; charging said intermediate charge receiving circuit with energy obtained from said photovoltaic receiver as a result of said intermittent illuminating; measuring a voltage drop across said intermediate charge receiving circuit and said storage battery with a feedback circuit; and
,synchronizing said measuring step with said intermittent illuminating step so that say measuring step occurs during said off-state of said laser.
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Specification
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Current Assigneethe united states of america as represented by the secretary of the navy
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Original Assigneethe united states of america as represented by the secretary of the navy
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InventorsRamirez, Ayax D., Kasa, Shannon D., Russell, Stephen D.
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Primary Examiner(s)Grant, Robert
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Application NumberUS12/859,156Time in Patent Office2,344 DaysField of Search320/101US Class Current1/1CPC Class CodesH02J 7/35 with light sensitive cellsY02E 10/56 Power conversion systems, e...
