Vehicle wireless power transfer using metal member with high permeability to improve charging efficiency
First Claim
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1. A vehicle comprising:
- a power reception apparatus including a power reception coil configured to wirelessly receive electric power from a power transmission coil, the power reception apparatus being provided at a bottom surface of the vehicle; and
at least one metal member provided at a position horizontally adjacent to the power reception apparatus in plan view as seen from below the bottom surface of the vehicle,the at least one metal member being formed of a metal having a higher magnetic permeability than a magnetic permeability of aluminum,the power reception coil includinga low-turn-count portion with a smaller number of turns, anda high-turn-count portion with a larger number of turns than the low-turn-count portion, andthe low-turn-count portion being located in at least a part of a facing portion of the power reception coil, the facing portion facing the at least one metal member in plan view as seen from below the at least one metal member and the power reception coil.
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Abstract
A bottom portion of a vehicle includes a metal member formed of a metal having a higher magnetic permeability than aluminum, and a power reception coil including a low-turn-count portion with a smaller number of turns and a high-turn-count portion with a larger number of turns than the low-turn-count portion. In plan view as seen from below the metal member and the power reception coil, the low-turn-count-portion is located in at least a part of a facing portion of the power reception coil, the facing portion facing the metal member.
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Citations
7 Claims
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1. A vehicle comprising:
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a power reception apparatus including a power reception coil configured to wirelessly receive electric power from a power transmission coil, the power reception apparatus being provided at a bottom surface of the vehicle; and at least one metal member provided at a position horizontally adjacent to the power reception apparatus in plan view as seen from below the bottom surface of the vehicle, the at least one metal member being formed of a metal having a higher magnetic permeability than a magnetic permeability of aluminum, the power reception coil including a low-turn-count portion with a smaller number of turns, and a high-turn-count portion with a larger number of turns than the low-turn-count portion, and the low-turn-count portion being located in at least a part of a facing portion of the power reception coil, the facing portion facing the at least one metal member in plan view as seen from below the at least one metal member and the power reception coil. - View Dependent Claims (2, 6, 7)
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3. A vehicle comprising:
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a power reception apparatus including a power reception coil configured to wirelessly receive electric power from a power transmission coil, the power reception apparatus being provided at a bottom surface of the vehicle; and at least one metal member provided at a position horizontally adjacent to the power reception apparatus in plan view as seen from below the bottom surface, the at least one metal member having a magnetic permeability equal to or less than a magnetic permeability of aluminum, the power reception coil including a low-turn-count portion with a smaller number of turns, and a high-turn-count portion with a larger number of turns than the low-turn-count portion, and the high-turn-count portion being located in at least a part of a facing portion of the power reception coil, the facing portion facing the at least one metal member in plan view as seen from below the at least one metal member and the power reception coil. - View Dependent Claims (4, 5)
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Specification