Power storage device and semiconductor device provided with the power storage device
First Claim
1. A method for charging a power storage device through electromagnetic wave, comprising steps of:
- supplying electromagnetic wave from a power feeder to an antenna of a power storage device;
in a period in which the power storage device is charged, transmitting a signal for informing the power feeder side from the power storage device whether the power feeder and the power storage device are in a charging state;
stopping the signal from the power storage device when a determination circuit of the power storage device determines that charging is completed; and
stopping electromagnetic wave supplied by the power feeder when the signal from the power storage device is stopped.
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Abstract
An object is to provide a power storage device provided with a battery that is a power storage means, for safe and accurate supply of electric power in a short period of time for drive power supply voltage without checking remaining capacity of the battery or changing batteries with deterioration over time of the battery for drive power supply voltage. The power storage device is provided with a battery that is a power storage means as a power supply for supplying electric power and a counter circuit for counting charging time of the power storage means. An electromagnetic wave with electric field intensity, magnetic field intensity, and power flux density per unit time which are transmitted from a power feeder are controlled, and the power storage means is efficiently charged using the electromagnetic wave in a short period of time.
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Citations
15 Claims
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1. A method for charging a power storage device through electromagnetic wave, comprising steps of:
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supplying electromagnetic wave from a power feeder to an antenna of a power storage device; in a period in which the power storage device is charged, transmitting a signal for informing the power feeder side from the power storage device whether the power feeder and the power storage device are in a charging state; stopping the signal from the power storage device when a determination circuit of the power storage device determines that charging is completed; and stopping electromagnetic wave supplied by the power feeder when the signal from the power storage device is stopped. - View Dependent Claims (2, 3, 4, 5)
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6. A method for charging a power storage device through electromagnetic wave, comprising steps of:
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supplying electromagnetic wave from a power feeder to an antenna of a power storage device; in a period in which the power storage device is charged, regularly transmitting a signal for informing the power feeder side from the power storage device whether the power feeder and the power storage device are in a charging state; stopping the signal from the power storage device when a determination circuit of the power storage device determines that charging is completed; and stopping electromagnetic wave supplied by the power feeder when the signal from the power storage device is stopped. - View Dependent Claims (7, 8, 9, 10)
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11. A method for charging a power storage device through electromagnetic wave, comprising steps of:
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supplying electromagnetic wave from a power feeder to an antenna of a power storage device; in a period in which the power storage device is charged, transmitting a signal for informing the power feeder side from the power storage device whether the power feeder and the power storage device are in a wireless charging state; stopping the signal from the power storage device when a determination circuit of the power storage device determines that charging is completed; and stopping electromagnetic wave supplied by the power feeder when the signal from the power storage device is stopped. - View Dependent Claims (12, 13, 14, 15)
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Specification