Vehicle, power transmitting device and contactless power supply system
First Claim
1. A vehicle comprising:
- a power receiving unit configured to contactlessly receive electric power from a power transmitting device;
an electrical storage device configured to store electric power received by the power receiving unit; and
an impedance adjustment unit electrically connected between the power receiving unit and the electrical storage device, the impedance adjustment unit being configured to adjust an impedance between the power receiving unit and the electrical storage device, the impedance adjustment unit being configured to switch an adjusted state of the impedance between a first adjusted state and a second adjusted state on the basis of a power transfer state from the power transmitting device to the power receiving unit, and electric power received by the power receiving unit in the first adjusted state being supplied to the electrical storage device in a state where the impedance is not adjusted, whereinthe power transmitting device includes a power transmitting unit configured to contactlessly supply electric power, anda coupling coefficient between the power transmitting unit and the power receiving unit is smaller than or equal to 0.1.
1 Assignment
0 Petitions
Accused Products
Abstract
A contactless power supply system contactlessly transmits electric power from a power transmitting device to a vehicle. The vehicle includes: a power receiving unit that contactlessly receives electric power from the power transmitting device; an electrical storage device that stores electric power received by the power receiving unit; and an impedance adjustment unit that includes a DC/DC converter and a relay and that is used to adjust an impedance between the power receiving unit and the electrical storage device. A vehicle ECU switches between a power supply path of which the impedance is adjusted by the DC/DC converter and a power supply path that does not use the DC/DC converter on the basis of a state of charge of the electrical storage device.
16 Citations
20 Claims
-
1. A vehicle comprising:
-
a power receiving unit configured to contactlessly receive electric power from a power transmitting device; an electrical storage device configured to store electric power received by the power receiving unit; and an impedance adjustment unit electrically connected between the power receiving unit and the electrical storage device, the impedance adjustment unit being configured to adjust an impedance between the power receiving unit and the electrical storage device, the impedance adjustment unit being configured to switch an adjusted state of the impedance between a first adjusted state and a second adjusted state on the basis of a power transfer state from the power transmitting device to the power receiving unit, and electric power received by the power receiving unit in the first adjusted state being supplied to the electrical storage device in a state where the impedance is not adjusted, wherein the power transmitting device includes a power transmitting unit configured to contactlessly supply electric power, and a coupling coefficient between the power transmitting unit and the power receiving unit is smaller than or equal to 0.1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A contactless power supply system that contactlessly supplies electric power, comprising:
-
a vehicle; and a power transmitting device that includes;
a power supply unit, a power transmitting unit and a first impedance adjustment unit, the power transmitting unit being configured to contactlessly supply electric power to the vehicle, the electric power being supplied from the power supply unit;
the first impedance adjustment unit being electrically connected between the power supply unit and the power transmitting unit, and the first impedance adjustment unit being configured to adjust an impedance between the power supply unit and the power transmitting unit,the first impedance adjustment unit being configured to switch an adjusted state of the impedance between a first adjusted state and a second adjusted state on the basis of a power transfer state from the power transmitting device to the vehicle, electric power from the power supply unit in the first adjusted state being supplied to the power transmitting unit in a state where the impedance is not adjusted, the vehicle including;
a power receiving unit, an electrical storage device and a second impedance adjustment unit, the power receiving unit being configured to contactlessly receive electric power from the power transmitting unit, the electrical storage device being configured to store electric power received by the power receiving unit, the second impedance adjustment unit being electrically connected between the power receiving unit and the electrical storage device, the second impedance adjustment unit being configured to adjust an impedance between the power receiving unit and the electrical storage device,the second impedance adjustment unit being configured to switch an adjusted state of the impedance between a third adjusted state and a fourth adjusted state on the basis of the power transfer state from the power transmitting device to the vehicle, electric power received by the power receiving unit in the third adjusted state being supplied to the electrical storage device in a state where the impedance is not adjusted, wherein a coupling coefficient between the power transmitting unit and the power receiving unit is smaller than or equal to 0.1. - View Dependent Claims (13)
-
-
14. A vehicle comprising:
-
a power receiving unit configured to contactlessly receive electric power from a power transmitting device; an electrical storage device configured to store electric power received by the power receiving unit; an impedance adjustment unit electrically connected between the power receiving unit and the electrical storage device, the impedance adjustment unit being configured to adjust an impedance between the power receiving unit and the electrical storage device, the impedance adjustment unit being configured to switch an adjusted state of the impedance between a first adjusted state and a second adjusted state on the basis of a power transfer state from the power transmitting device to the power receiving unit, and electric power received by the power receiving unit in the first adjusted state being supplied to the electrical storage device in a state where the impedance is not adjusted; and a control unit configured to control the impedance adjustment unit, the control unit being configured to switch between the first adjusted state and the second adjusted state on the basis of a power transfer efficiency between the power transmitting device and the power receiving unit. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A contactless power supply system that contactlessly supplies electric power, comprising:
-
a vehicle; and a power transmitting device that includes;
a power supply unit, a power transmitting unit and a first impedance adjustment unit, the power transmitting unit being configured to contactlessly supply electric power to the vehicle, the electric power being supplied from the power supply unit;
the first impedance adjustment unit being electrically connected between the power supply unit and the power transmitting unit, and the first impedance adjustment unit being configured to adjust an impedance between the power supply unit and the power transmitting unit,the first impedance adjustment unit being configured to switch an adjusted state of the impedance between a first adjusted state and a second adjusted state on the basis of a power transfer state from the power transmitting device to the vehicle, electric power from the power supply unit in the first adjusted state being supplied to the power transmitting unit in a state where the impedance is not adjusted, the vehicle including;
a power receiving unit, an electrical storage device, a second impedance adjustment unit, and a control unit, the power receiving unit being configured to contactlessly receive electric power from the power transmitting unit, the electrical storage device being configured to store electric power received by the power receiving unit, the second impedance adjustment unit being electrically connected between the power receiving unit and the electrical storage device, the second impedance adjustment unit being configured to adjust an impedance between the power receiving unit and the electrical storage device,the second impedance adjustment unit being configured to switch an adjusted state of the impedance between a third adjusted state and a fourth adjusted state on the basis of the power transfer state from the power transmitting device to the vehicle, electric power received by the power receiving unit in the third adjusted state being supplied to the electrical storage device in a state where the impedance is not adjusted, and the control unit being configured to control the second impedance adjustment unit, and the control unit being configured to switch between the third adjusted state and the fourth adjusted state on the basis of a power transfer efficiency between the power transmitting device and the power receiving unit. - View Dependent Claims (20)
-
Specification