HIGH POWER WIRELESS CHARGING

• Main Author: Gruber, Bernhard
• Format: Patent
• Language: English; French; German
• Published: 31.05.2023
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

A system (17) of a power device (18) and a portable device (19) for wireless charging of a battery (3) of the portable device (19), which power device (18) comprises a first transmitter stage (20) with an antenna (21) to receive power adjustment information (16) from a first receiver stage (22) of the portable device (19) to increase or to decrease the power transmitted by a first magnetic field emitted with the antenna (21) of the first transmitter stage (20) and which first receiver stage (22) comprises an antenna (23) exposed to the first magnetic field and connected via a matching stage (15) to a rectifier stage (6) to rectify an antenna signal and to provide an input voltage (UI) at an input pin of a charge stage (7) that provides a first charge current (IC1) at a first output pin (24) connected to the battery (3) to charge the battery (3) in charging cycles (25), wherein the power device (18) comprises at least a second transmitter stage (26) with an antenna (27) to emit a second magnetic field and that the portable device (19) comprises at least a second receiver stage (30) with an antenna (31) exposed to the second magnetic field and with a second charge stage that provides a second charge current (IC2) at a second output pin (32) connected to the battery (3) to charge the battery (3) in the charging cycles (25).