Power reception device and vehicle including the same
First Claim
1. A power reception device which is mounted on a vehicle and receives, in a contactless manner, electric power output from a power transmission device provided outside said vehicle, the power reception device comprising:
- a power reception coil configured to receive, in a contactless manner, the electric power output from a power transmission coil of said power transmission device;
a rectifying circuit for rectifying the electric power received by said power reception coil; and
a notifying device configured to notify detection of the rising of said voltage;
said power reception coil is configured such that, when said vehicle moves such that said power reception coil comes closer to said power transmission coil, a voltage characteristic indicating a relation between said distance and said voltage has first rising and second rising at which said distance is smaller than a position where said first rising occurs,said rectifying circuit including;
a rectifier; and
a capacitor provided on an output side of said rectifier,a voltage sensor provided on an output side of said rectifying circuit; and
a control device configured to detect a distance between said power transmission coil and said power reception coil,said control device detecting rising of a voltage detected by said voltage sensor, and detecting said distance based on a movement distance of said vehicle from a reference distance indicative of said distance at which the rising of said voltage occurs, said reference distance being prepared in advance, andwhen the rising of said voltage is detected, said notifying device notifies said reference distance,when said first rising is detected, said notifying device notifies the detection of said first rising, and when said second rising is detected, said notifying device notifies the detection of said second rising.
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Accused Products
Abstract
A power reception coil of a power reception unit is configured to receive, in a contactless manner, the electric power output from a power transmission coil of a power transmission unit. A rectifying circuit includes a rectifier and a capacitor provided on an output side of the rectifier, and rectifies the electric power received by the power reception coil. A voltage sensor is provided on an output side of the rectifying circuit. A vehicle ECU detects rising of a voltage detected by the voltage sensor, and detects a distance between the coils based on a movement distance of a vehicle from a reference distance indicative of the distance between the coils at which the rising of voltage occurs, the reference distance is prepared in advance.
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Citations
9 Claims
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1. A power reception device which is mounted on a vehicle and receives, in a contactless manner, electric power output from a power transmission device provided outside said vehicle, the power reception device comprising:
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a power reception coil configured to receive, in a contactless manner, the electric power output from a power transmission coil of said power transmission device; a rectifying circuit for rectifying the electric power received by said power reception coil; and a notifying device configured to notify detection of the rising of said voltage; said power reception coil is configured such that, when said vehicle moves such that said power reception coil comes closer to said power transmission coil, a voltage characteristic indicating a relation between said distance and said voltage has first rising and second rising at which said distance is smaller than a position where said first rising occurs, said rectifying circuit including; a rectifier; and a capacitor provided on an output side of said rectifier, a voltage sensor provided on an output side of said rectifying circuit; and a control device configured to detect a distance between said power transmission coil and said power reception coil, said control device detecting rising of a voltage detected by said voltage sensor, and detecting said distance based on a movement distance of said vehicle from a reference distance indicative of said distance at which the rising of said voltage occurs, said reference distance being prepared in advance, and when the rising of said voltage is detected, said notifying device notifies said reference distance, when said first rising is detected, said notifying device notifies the detection of said first rising, and when said second rising is detected, said notifying device notifies the detection of said second rising. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power reception device which is mounted on a vehicle and receives, in a contactless manner, electric power output from a power transmission device provided outside said vehicle, the power reception device comprising:
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a power reception coil configured to receive, in a contactless manner, the electric power output from a power transmission coil of said power transmission device; a rectifying circuit for rectifying the electric power received by said power reception coil; said rectifying circuit including; a rectifier; and a capacitor provided on an output side of said rectifier, a voltage sensor provided on an output side of said rectifying circuit; and a control device configured to detect a distance between said power transmission coil and said power reception coil, said control device detecting rising of a voltage detected by said voltage sensor, and detecting said distance based on a movement distance of said vehicle from a reference distance indicative of said distance at which the rising of said voltage occurs, said reference distance being prepared in advance, when said voltage becomes equal to or higher than a predetermined voltage after the start of detection of said distance, said control device determines that said distance is a first prescribed distance, when an increasing rate of said voltage becomes equal to or higher than a predetermined increasing rate after it is determined that said distance is said first prescribed distance, said control device further determines that the rising of said voltage has been detected and determines that said distance is a second prescribed distance, and during a period from when said first prescribed distance is detected to when the rising of said voltage is detected, said control device calculates said distance based on said first prescribed distance and said movement distance, and when the rising of said voltage is detected, said control device calculates said distance based on said second prescribed distance and said movement distance.
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Specification