Wireless charging mats for portable electronic devices

• Main Authors: Graham, Christopher S, Kowalski, Stefan A, Larsson, Karl Ruben F, Haug, Grant S, Jol, Eric S, Kasar, Darshan R, Thompson, Paul J, Karanikos, Demetrios B
• Format: Patent
• Language: English
• Published: 28.03.2019
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

Embodiments describe a wireless charging device that includes: a housing having an outer perimeter and one or more walls defining an interior cavity; a charging surface within the outer perimeter of the housing; a transmitter coil arrangement disposed within the interior cavity below the planar charging surface, the transmitter coil arrangement comprising a plurality of transmitter coils arranged in different layers, each transmitter coil having a pair of termination ends; wherein the plurality of transmitter coils comprises a plurality of inner transmitter coils and a plurality of outer transmitter coils positioned around the inner transmitter coils; and wherein the pair of termination ends of the plurality of outer transmitter coils are arranged differently than the pair of termination ends of the plurality of inner transmitter coils.