Power reception device and power reception method for non-contact power transmission
First Claim
1. A power reception device includable in a non-contact power transmission system that performs non-contact power transmission from a power transmission device to the power reception device through a primary coil and a secondary coil, the power reception device supplying power to a first load of a load device that is connectable to the power reception device, the power reception device comprising:
- a power reception circuit that is adapted to be connected to the first load and that converts an induced voltage in the secondary coil into a direct-current voltage;
a load modulation circuit that modulates a second load; and
a power supply control circuit that controls the power supplied to the first load,the load modulation circuit being configured to transmit information from the power reception device to the power transmission device through the secondary coil and the primary coil utilizing load modulation of the second load while the power transmission device transmits information to the power reception device through the primary coil and the secondary coil utilizing frequency modulation.
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Accused Products
Abstract
A power reception control device provided in a power reception device of a non-contact power transmission system includes a power-reception-side control circuit that controls an operation of the power reception device, and a power supply control signal output terminal that supplies a power supply control signal to a charge control device, the power supply control signal controlling power supply to a battery. The power-reception-side control circuit controls a timing at which the power supply control signal (ICUTX) is output from the power supply control signal output terminal. The operation of the charge control device is compulsorily controlled using the power supply control signal (ICUTX).
22 Citations
9 Claims
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1. A power reception device includable in a non-contact power transmission system that performs non-contact power transmission from a power transmission device to the power reception device through a primary coil and a secondary coil, the power reception device supplying power to a first load of a load device that is connectable to the power reception device, the power reception device comprising:
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a power reception circuit that is adapted to be connected to the first load and that converts an induced voltage in the secondary coil into a direct-current voltage; a load modulation circuit that modulates a second load; and a power supply control circuit that controls the power supplied to the first load, the load modulation circuit being configured to transmit information from the power reception device to the power transmission device through the secondary coil and the primary coil utilizing load modulation of the second load while the power transmission device transmits information to the power reception device through the primary coil and the secondary coil utilizing frequency modulation. - View Dependent Claims (2, 5, 6, 7, 8, 9)
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3. A power reception method for a non-contact power transmission system that performs non-contact power transmission from a power transmission device to a power reception device through a primary coil and a secondary coil, the power reception device supplying power to a first load, the power reception method comprising:
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operating a power reception circuit and converting an induced voltage in the secondary coil into a direct-current voltage; supplying power to the first load; modulating a second load of the power reception circuit; and transmitting information from the power reception device to the power transmission device through the secondary coil to the primary coil utilizing a load modulation of the second load while transmitting information from the power transmission device to the power reception device through the primary coil and the secondary coil utilizing frequency modulation. - View Dependent Claims (4)
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Specification