Passive Flux Bridge for Charging Electric Vehicles

A method for increasing a power coupling between a vehicle power-transfer system of an electric vehicle and a base power-transfer system, the method comprising:

• positioning a mobile apparatus directly between a base coil of the base power-transfer system and a vehicle coil of the vehicle power-transfer system, the mobile apparatus including ferrite configured to passively channel magnetic flux between the base power-transfer system and the vehicle power-transfer system to wirelessly charge a battery of the electric vehicle;
• and
• orienting the ferrite to directionally position the ferrite between the vehicle coil and the base coil and steer the magnetic flux from the base power-transfer system toward the vehicle power-transfer system.

A mobile base power-transfer apparatus comprising:

• ferrite configured to channel magnetic flux induced by a magnetic field;
• and
• a first coil configured to generate the magnetic field based on an electric current running through the first coil, the first coil configured to be removably positioned proximate to a second coil of another base power-transfer apparatus to provide a combined magnetic field that is greater than the magnetic field generated by the first coil, the electric current running through the first coil being synchronized with a current running through the second coil, the electric current running through the first coil in a first direction that is opposite a second direction of the current running through the second coil.