US 12,283,838 B2
Reverse wireless charging power management
Ross C. Morgan, Bathgate (GB)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Aug. 5, 2021, as Appl. No. 17/394,782.
Claims priority of provisional application 63/221,724, filed on Jul. 14, 2021.
Claims priority of provisional application 63/065,809, filed on Aug. 14, 2020.
Prior Publication US 2022/0052544 A1, Feb. 17, 2022
Int. Cl. H02J 50/80 (2016.01); B60L 53/53 (2019.01); H02J 7/00 (2006.01); H02J 50/10 (2016.01); H04B 5/79 (2024.01); H02J 7/34 (2006.01)
CPC H02J 7/00712 (2020.01) [H02J 7/00036 (2020.01); H02J 50/10 (2016.02); H02J 50/80 (2016.02); B60L 53/53 (2019.02); H02J 7/342 (2020.01); H04B 5/79 (2024.01); Y02B 70/3225 (2013.01); Y04S 20/222 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system, comprising:
a wireless transmission module configured to transmit electrical energy to a wireless receiver module via reverse wireless charging;
one or more electronic components other than the wireless transmission module;
a battery configured to provide electrical energy to the wireless transmission module and the one or more electronic components; and
a battery management module coupled to the battery and the wireless transmission module and configured to:
determine an amount of power demanded by the wireless transmission module and the one or more electronic components from the battery;
dynamically vary power transfer from the wireless transmission module to the wireless receiver module as a function of the amount of power demanded by the one or more electronic components;
reduce power transfer from the wireless transmission module to the wireless receiver module when the amount of power demanded by the one or more electronic components increases above a configurable power limit; and
cause the wireless transmission module to communicate a message to the wireless receiver module indicating that power transfer from the wireless transmission module to the wireless receiver module is reduced;
wherein responsive to the message, the wireless receiver module prevents disconnection of the wireless power transfer link between the wireless transmission module and the wireless receiver module by disabling a state of the system relating to sudden change in power.