Non-contact power supply system and power reception device
A non-contact power supply system supplies electric power in a non-contact manner from a plurality of power transmission coils disposed on a road to a power receiving coil mounted on a vehicle traveling on the road. The non-contact power supply system includes a first estimation unit configured to estimate a future position of the vehicle, based on a speed of the vehicle, and a specifying unit configured to specify a power transmission coil that has to be in an activated state that is a state of being able to supply electric power to the power receiving coil, among the power transmission coils, based on the estimated future position.
1. A non-contact power supply system that supplies electric power in a non-contact manner from a plurality of power transmission coils disposed on a road to a power receiving coil mounted on a vehicle traveling on the road, the non-contact power supply system comprising:
the plurality of power transmission coils;
a first estimation unit configured to estimate a future position of the vehicle, based on a speed of the vehicle;
a specifying unit configured to specify a power transmission coil that has to be in an activated state that is a state of being able to supply electric power to the power receiving coil, among the power transmission coils, based on the estimated future position; and
a decision unit configured to decide whether or not to make the specified power transmission coil actually be in the activated state, based on a signal indicating an operation intention of a driver of the vehicle.
2. The non-contact power supply system according to claim 1 , wherein:
the first estimation unit is configured to estimate a predicted course that is a set of the future positions, based on a movement state of the vehicle including the speed; and
the specifying unit is configured to specify a power transmission coil that has to be in the activated state, based on the estimated predicted course.
3. The non-contact power supply system according to claim 1 , further comprising:
a second estimation unit configured to estimate a position of the vehicle on the road, based on a position in a direction in which the road extends, of one power transmission coil that has supplied electric power to the power receiving coil, among the power transmission coils, and an amount of electric power supplied from the one power transmission coil to the power receiving coil,
wherein the first estimation unit estimates the future position, based on the position estimated by the second estimation unit, in addition to the speed.
4. A non-contact power supply system that supplies electric power in a non-contact manner from a plurality of power transmission coils disposed on a road to a power receiving coil mounted on a vehicle traveling on the road, the non- contact power supply system comprising:
a first estimation unit configured to estimate a future position of the vehicle, based on a speed of the vehicle;
a specifying unit configured to specify a power transmission coil that has to be in an activated state that is a state of being able to supply electric power to the power receiving coil, among the power transmission coils, based on the estimated future position; and
a coil controller configured to control each of the power transmission coils such that each of the power transmission coils enters the activated state and control each of the power transmission coils such that each of the power transmission coils enters a standby state that is a state where each of the power transmission coils does not supply electric power to the power receiving coil, after each of the power transmission coils enters the activated state,
wherein in a case where there is another vehicle that is different from the vehicle and that travels behind the vehicle on the road, the coil controller decides whether or not to extend a period in which the power transmission coil that has entered the activated state due to the vehicle maintains the activated state, based on a position of the other vehicle.
5. The non-contact power supply system according to claim 4 , wherein:
the first estimation unit is configured to estimate a predicted course that is a set of the future positions, based on a movement state of the vehicle including the speed; and
the specifying unit is configured to specify a power transmission coil that has to be in the activated state, based on the estimated predicted course.
6. The non-contact power supply system according to claim 4 , further comprising:
a second estimation unit configured to estimate a position of the vehicle on the road, based on a position in a direction in which the road extends, of one power transmission coil that has supplied electric power to the power receiving coil, among the power transmission coils, and an amount of electric power supplied from the one power transmission coil to the power receiving coil,
wherein the first estimation unit estimates the future position, based on the position estimated by the second estimation unit, in addition to the speed.
7. A power reception device that is mounted on a vehicle in a non-contact power supply system that supplies electric power in a non-contact manner from a plurality of power transmission coils disposed on a road to a power receiving coil mounted on the vehicle traveling on the road, the power reception device comprising:
a first estimation unit configured to estimate a future position of the vehicle, based on a speed of the vehicle;
a specifying unit configured to specify a power transmission coil that has to be in an activated state that is a state of being able to supply electric power to the power receiving coil, among the power transmission coils, based on the estimated future position; and
a decision unit configured to decide whether or not to make the specified power transmission coil actually be in the activated state, based on a signal indicating an operation intention of a driver of the vehicle.
8. The power reception device according to claim 7 , wherein:
the first estimation unit is configured to estimate a predicted course that is a set of the future positions, based on a movement state of the vehicle including the speed; and
the specifying unit is configured to specify a power transmission coil that has to be in the activated state, based on the estimated predicted course.
9. The power reception device according to claim 7 , further comprising:
a second estimation unit configured to estimate a position of the vehicle on the road, based on a position in a direction in which the road extends, of one power transmission coil that has supplied electric power to the power receiving coil, among the power transmission coils, and an amount of electric power supplied from the one power transmission coil to the power receiving coil,
wherein the first estimation unit estimates the future position, based on the position estimated by the second estimation unit, in addition to the speed.