Vehicle and contactless power supply system for adjusting impedence based on power transfer efficiency
First Claim
1. A vehicle that contactlessly receives electric power from a power transmitting device of which an impedance is adjustable by a first impedance adjustment unit, comprising:
- a power receiving unit configured to contactlessly receive electric power from the power transmitting device;
an electrical storage device configured to store electric power received by the power receiving unit;
an electronic control unit configured to control charging operation of the electrical storage device, the electronic control unit being configured to output a command to adjust the first impedance adjustment unit to the power transmitting device, and the electronic control unit being configured to set an impedance of the first impedance adjustment unit based on a power transfer efficiency between the power transmitting device and the power receiving unit while the electrical storage device is being charged; and
a second impedance adjustment unit configured to adjust an impedance between the power receiving unit and the electrical storage device, whereinthe power transmitting device is configured to use one of a first electric power and a second electric power lower than the first electric power as a transmitted electric power for charging the electrical storage device,the electronic control unit is configured to cause the power transmitting device to output the first electric power when a value indicating a state of charge of the electrical storage device is lower than or equal to a predetermined threshold, andthe electronic control unit is configured to cause the power transmitting device to output the second electric power and set an impedance of the second impedance adjustment unit based on the transmitted electric power from the power transmitting device, when the value indicating the state of charge exceeds the threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A contactless power supply system contactlessly supplies electric power from a power transmitting device to a vehicle. The vehicle includes a power receiving unit contactlessly receiving electric power from the power transmitting device, an electrical storage device storing electric power received by the power receiving unit, and a vehicle ECU. The power transmitting device includes a power supply unit, a power transmitting unit contactlessly supplying electric power, supplied from the power supply unit, to the power receiving unit and a matching transformer used to adjust an impedance between the power supply unit and the power transmitting unit. The vehicle ECU is able to output, to the power transmitting device, a command to adjust the matching transformer, and sets an impedance of the matching transformer on the basis of a power transfer efficiency between the power transmitting unit and the power receiving unit while the electrical storage device is being charged.
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Citations
9 Claims
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1. A vehicle that contactlessly receives electric power from a power transmitting device of which an impedance is adjustable by a first impedance adjustment unit, comprising:
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a power receiving unit configured to contactlessly receive electric power from the power transmitting device; an electrical storage device configured to store electric power received by the power receiving unit; an electronic control unit configured to control charging operation of the electrical storage device, the electronic control unit being configured to output a command to adjust the first impedance adjustment unit to the power transmitting device, and the electronic control unit being configured to set an impedance of the first impedance adjustment unit based on a power transfer efficiency between the power transmitting device and the power receiving unit while the electrical storage device is being charged; and a second impedance adjustment unit configured to adjust an impedance between the power receiving unit and the electrical storage device, wherein the power transmitting device is configured to use one of a first electric power and a second electric power lower than the first electric power as a transmitted electric power for charging the electrical storage device, the electronic control unit is configured to cause the power transmitting device to output the first electric power when a value indicating a state of charge of the electrical storage device is lower than or equal to a predetermined threshold, and the electronic control unit is configured to cause the power transmitting device to output the second electric power and set an impedance of the second impedance adjustment unit based on the transmitted electric power from the power transmitting device, when the value indicating the state of charge exceeds the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A contactless power supply system that contactlessly supplies electric power, comprising:
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a power transmitting device including a power supply unit, a power transmitting unit and an impedance adjustment unit, the power transmitting unit being configured to contactlessly supply electric power, the electric power being supplied from the power supply unit to a power receiving unit, the impedance adjustment unit being electrically connected between the power supply unit and the power transmitting unit, and the impedance adjustment unit being configured to adjust an impedance between the power supply unit and the power transmitting unit; and a vehicle including the power receiving unit, an electrical storage device and an electronic control unit, the power receiving unit being configured to contactlessly receive electric power from the power transmitting device, the electrical storage device being configured to store electric power received by the power receiving unit, the electronic control unit being configured to control charging operation of the electrical storage device, the electronic control unit being configured to output a command to adjust the impedance adjustment unit to the power transmitting device, and the electronic control unit being configured to set an impedance of the impedance adjustment unit based on a power transfer efficiency between the power transmitting unit and the power receiving unit while the electrical storage device is being charged; and a second impedance adjustment unit configured to adjust an impedance between the power receiving unit and the electrical storage device, wherein the power transmitting device is configured to use one of a first electric power and a second electric power lower than the first electric power as a transmitted electric power for charging the electrical storage device, the electronic control unit is configured to cause the power transmitting device to output the first electric power when a value indicating a state of charge of the electrical storage device is lower than or equal to a predetermined threshold, and the electronic control unit is configured to cause the power transmitting device to output the second electric power and set an impedance of the second impedance adjustment unit based on the transmitted electric power from the power transmitting device, when the value indicating the state of charge exceeds the threshold.
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Specification