Wireless energy transfer for rechargeable batteries

摘要

A wireless energy transfer enabled battery includes a resonator that is positioned asymmetrically in a battery sized enclosure such that when two wirelessly enabled batteries are placed in close proximity the resonators of the two batteries have low coupling.

主权项

1. An assembly configured to receive power wirelessly through an oscillating magnetic field generated by a wireless power source, the assembly comprising:
a first resonator coil having a first characteristic size and configured to couple to a first electrical load; and a second resonator coil having a second characteristic size and positioned so that a minimum distance between the first resonator coil and the second resonator coil is less than half as large as a larger of the first and second characteristic sizes, wherein the second resonator coil is oriented with respect to the first resonator coil so that a value of a coupling parameter k between the first and second resonator coils is smaller by a factor of at least two than a maximum value of k for any orientation of the second resonator coil for the same minimum distance between the first and second resonator coils.