Electricity supply device, electricity reception device, and electricity supply system

An electricity supply apparatus that supplies electricity in a contactless manner to an electricity reception section provided in a vehicle, the apparatus comprising:

• a hollow ring-shaped electricity supply coil that supplies electricity to an electricity reception coil of the electricity reception section;
• and
• a casing that houses the electricity supply coil, wherein
• the casing includes an inclined portion that inclines in such a way as to gradually approach the electricity supply coil toward an outer periphery of the electricity supply coil, wherein:
• the inclined portion is formed in at least a part of a projection region formed when the electricity supply coil is projected to the casing in a center axis direction of the electricity supply coil;
• and
• when a foreign object having a flat surface is on the inclined portion with the flat surface in contact with the inclined portion, the inclined portion causes the flat surface of the foreign object to incline at a predetermined angle with respect to a radial direction of the electricity supply coil.

An electricity reception apparatus that is provided in a vehicle and that receives electricity from an electricity supply section in a contactless manner, the apparatus comprising:

• a hollow ring-shaped electricity reception coil that receives electricity from the electricity supply coil of the electricity supply section;
• and
• a casing that houses the electricity reception coil, wherein
• the casing includes an inclined portion that inclines in such a way as to gradually approach the electricity reception coil toward an outer periphery of the electricity reception coil, wherein
• the inclined portion is formed in at least a part of a projection region formed when the electricity reception coil is projected to the casing in a center axis direction of the electricity reception coil.

An electricity supply system comprising:

• an electricity reception apparatus that is provided in a vehicle;
• and
• an electricity supply apparatus that supplies electricity in a contactless manner to the electricity reception apparatus, wherein
• the electricity reception apparatus includes:
• a hollow ring-shaped electricity reception coil that receives electricity from an electricity supply coil of the electricity supply apparatus;
• and
• an electricity-reception-side casing that houses the electricity reception coil, and
• the electricity supply apparatus includes:
• a hollow ring-shaped electricity supply coil that supplies electricity to the electricity reception coil of the electricity reception apparatus;
• and
• an electricity-supply-side casing that houses the electricity supply coil, wherein:
• the electricity-reception-side casing includes an electricity-reception-side inclined portion that inclines in such a way as to gradually approach the electricity reception coil toward an outer periphery of the electricity reception coil, wherein
• the electricity-reception-side inclined portion is formed in at least a part of a first projection region formed when the electricity reception coil is projected to the electricity-reception-side casing in a center axis direction of the electricity reception coil;
• and
• the electricity-supply-side casing includes an electricity-supply-side inclined portion that inclines in such a way as to gradually approach the electricity supply coil toward an outer periphery of the electricity supply coil, wherein
• the electricity-supply-side inclined portion is formed in at least a part of a second projection region formed when the electricity supply coil is projected to the electricity-supply-side casing in a center axis direction of the electricity supply coil.