US 12,155,228 B2
Wireless power transmission device
Jungkeun Park, Seoul (KR); Gu Ho Jung, Sejong-si (KR); Chung Hee Lee, Sejong-si (KR); Ju Yong Lee, Daejeon (KR); Dong Ho Cho, Seoul (KR); and Dang-Oh Kim, Sejong-si (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
Appl. No. 18/020,591
Filed by LG ELECTRONICS INC., Seoul (KR); and KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, Daejeon (KR)
PCT Filed Aug. 10, 2020, PCT No. PCT/KR2020/010574
§ 371(c)(1), (2) Date Feb. 9, 2023,
PCT Pub. No. WO2022/034936, PCT Pub. Date Feb. 17, 2022.
Prior Publication US 2023/0299616 A1, Sep. 21, 2023
Int. Cl. H02J 50/12 (2016.01); H02J 50/40 (2016.01); H02J 50/90 (2016.01)
CPC H02J 50/12 (2016.02) [H02J 50/402 (2020.01); H02J 50/90 (2016.02)] 16 Claims
OG exemplary drawing
 
1. A wireless power transmission device comprising:
a plurality of transmission coil units,
wherein each of the plurality of transmission coil units includes a plurality of antenna coils arranged on different three-dimensional planes;
a plurality of power supplies respectively connected to the plurality of antenna coils within each transmission coil unit; and
a controller connected to the plurality of power supplies within a same transmission coil unit,
wherein the plurality of antenna coils are configured to generate a magnetic field passing through at least one or more of the different three-dimensional planes to transfer transmission power to a wireless power reception device,
wherein the controller is configured to:
obtain a mutual inductance of each of the plurality of antenna coils within the same transmission coil unit for the wireless power reception device when the wireless power reception device is disposed on the wireless power transmission device;
obtain a weight for each of the plurality of antenna coils within the same transmission coil unit based on the corresponding mutual inductance; and
adjust a supply voltage of one or more of the plurality of power supplies based on the corresponding weight, and
wherein the weight is a beamforming vector corresponding to the mutual inductance, the beamforming vector having a magnitude and a direction.