US 12,149,096 B2
Active electromagnetic shielding for high power dynamic wireless charging and related systems, methods, and devices
Bo Zhang, Salt Lake City, UT (US)
Assigned to Battelle Energy Alliance, LLC, Idaho Falls, ID (US)
Appl. No. 17/753,533
Filed by Battelle Energy Alliance, LLC, Idaho Falls, ID (US)
PCT Filed Sep. 10, 2020, PCT No. PCT/US2020/050067
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2021/050642, PCT Pub. Date Mar. 18, 2021.
Claims priority of provisional application 62/970,862, filed on Feb. 6, 2020.
Claims priority of provisional application 62/898,784, filed on Sep. 11, 2019.
Prior Publication US 2022/0393510 A1, Dec. 8, 2022
Int. Cl. H02J 50/12 (2016.01); B60L 53/12 (2019.01); H02J 50/05 (2016.01); H02J 50/40 (2016.01); H02J 50/70 (2016.01)
CPC H02J 50/12 (2016.02) [B60L 53/12 (2019.02); H02J 50/05 (2016.02); H02J 50/40 (2016.02); H02J 50/70 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless power transmitter, comprising:
a first canceling coil laterally offset from a power transmission coil on a first side thereof;
a second canceling coil laterally offset from the power transmission coil on a second side thereof, the second side opposite the first side, centers of the first canceling coil and the second canceling coil positioned a gap distance from a center of the power transmission coil to decouple the first canceling coil and the second canceling coil from the power transmission coil; and
circuitry electrically connected to the power transmission coil, the first canceling coil, and the second canceling coil, the first canceling coil and the second canceling coil electrically connected in series with the power transmission coil and in parallel with each other, the circuitry configured to provide a transmit current to the power transmission coil to generate electromagnetic fields for wireless charging, the transmit current to excite canceling currents in the first canceling coil and the second canceling coil in an opposite direction to that of the transmit current to generate canceling electromagnetic fields to destructively interfere with portions of the electromagnetic fields generated by the power transmission coil.