Flush-Mount Wireless Charging Power-Transfer System

A wireless charging apparatus comprising:

• a coil defining a coil plane and configured to generate a magnetic field, the coil comprising two coplanar coil portions parallel to the coil plane and including a first coil portion wound to define a first coil window and a second coil portion wound to define a second coil window;
• a plurality of rows of ferrite structures, wherein each row of the plurality of rows of ferrite structures comprises:
• a first ferrite structure that extends between the first coil window and the second coil window and that includes first and second protrusions on each side of the first ferrite structure that extend up into the first coil window and the second coil window, respectively, to at least partially intersect the coil plane;
• a second ferrite structure that extends between the first coil window and a first outer boundary of the first coil portion and that includes a third protrusion and a fourth protrusion, the third protrusion connected to an inner side of the second ferrite structure and extending up into the first coil window to at least partially intersect the coil plane, the fourth protrusion connected to an outer side of the second ferrite structure outside a boundary of the coil and extending above the a surface of the coil;
• and
• a third ferrite structure that extends between the second coil window and a second outer boundary of the second coil portion and that includes a fifth protrusion and a sixth protrusion, the fifth protrusion connected to an inner side of the third ferrite structure and extending up into the second coil window to at least partially intersect the coil plane, the sixth protrusion connected to an outer side of the third ferrite structure outside the boundary of the coil and extending above the surface of the coil.

A base wireless charging device comprising:

• a coil defining a coil plane and configured to generate a magnetic field, the coil having opposing top and bottom surfaces;
• a plurality of ferrite structures located proximate to the bottom surface of the coil and configured to provide a path for magnetic flux of the magnetic field, the magnetic field having main flux and side flux;
• steering means for steering a portion of the main flux in a direction normal to the coil plane to induce power in a vehicle wireless charging system;
• and
• capturing means for capturing additional portions of the side flux to reduce side-flux leakage.

A wireless charging apparatus comprising:

• a coil defining a coil plane and configured to generate a magnetic field, the coil comprising two coplanar coil portions parallel to the coil plane and including a first coil portion wound to define a first coil window and a second coil portion wound to define a second coil window;
• a plurality of rows of ferrite structures, wherein each row of the plurality of rows of ferrite structures comprises:
• a first ferrite structure portion that extends between the first coil window and the second coil window and that includes first and second protrusions on each side of the first ferrite structure portion that extend up into the first coil window and the second coil window, respectively, to at least partially intersect the coil plane;
• a second ferrite structure portion separated from the first ferrite structure portion by a first gap, the second ferrite structure portion including a third protrusion extending up into the first coil window to at least partially intersect the coil plane;
• and
• a third ferrite structure portion separated from the first ferrite structure portion by a second gap, the third ferrite structure portion including a fourth protrusion extending up into the second coil window to at least partially intersect the coil plane.