METHOD FOR WIRELESS CHARGING POWER CONTROL
First Claim
1. A method for wireless charging power control comprising:
- determining an effective charging power in a direct-current (DC) charging signal that charges a battery, wherein the DC charging signal is generated by a radio frequency (RF) power harvesting circuit based on a wireless RF charging signal received from a wireless charging station;
generating a battery charging signal indication (BCSI) based on the determined effective charging power in the DC charging signal; and
sending the BCSI to the wireless charging station to control a total RF power associated with the RF wireless charging signal.
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Accused Products
Abstract
A method for wireless charging power control is disclosed. In a wireless charging system, a wireless radio frequency (RF) charging signal transmitted by a wireless charging station is harvested and converted to a direct-current (DC) charging signal to charge a battery. To prevent overcharging damage to the battery, an effective charging power in the DC charging signal is measured and compared to a target charging power required by the battery. A battery charging signal indication (BCSI) is provided to the wireless charging station to decrease the effective charging power if the effective charging power is greater than the target charging power, or to increase the effective charging power if the effective charging power is less than the target charging power. By dynamically adjusting the effective charging power, it is possible to provide fast charging to the battery while protecting the battery from overcharging damage.
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Citations
20 Claims
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1. A method for wireless charging power control comprising:
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determining an effective charging power in a direct-current (DC) charging signal that charges a battery, wherein the DC charging signal is generated by a radio frequency (RF) power harvesting circuit based on a wireless RF charging signal received from a wireless charging station; generating a battery charging signal indication (BCSI) based on the determined effective charging power in the DC charging signal; and sending the BCSI to the wireless charging station to control a total RF power associated with the RF wireless charging signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for wireless charging power control comprising:
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comparing an effective charging power in a direct-current (DC) charging signal, which is generated by a radio frequency (RF) power harvesting circuit to charge a battery based on a wireless RF charging signal received from a wireless charging station, against a target charging power required by the battery; reducing the effective charging in the DC charging signal generated by the RF power harvesting circuit if the effective charging power is greater than the target charging power; and increasing the effective charging in the DC charging signal generated by the RF power harvesting circuit if the effective charging power is less than the target charging power. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification