US 12,603,524 B2 · Power transmitter protection for receiver fault in a wireless power system

Abstract

This disclosure provides systems, methods and apparatuses for a wireless power transmission apparatus to detect a fault of the wireless power reception apparatus. Various implementations relate generally to fault detection and mitigation in a wireless power system. In some aspects, a transmission (TX) controller of the wireless power transmission apparatus can detect a fault in the wireless power reception apparatus based on power transfer measurements or calculations in the wireless power transmission apparatus. The techniques may enable the wireless power transmission apparatus to detect faults such as an open circuit in the wireless power reception apparatus or a thermostat failure, among other examples. During the transmission of wireless power, the wireless power transmission apparatus may detect the fault and cease the transmission of wireless power.

Claims26

Dependent claims

A method performed by a Power Transmitter, comprising:

generating power for transmission from the Power Transmitter to a Power Receiver;
obtaining transmitter power measurements at an output of an inverter of the Power Transmitter during a power transfer period;
calculating a transmitter power based on an average of the transmitter power measurements;
calculating a power transfer amount for the power transfer period based, at least in part, on a difference between the transmitter power and an expected power transmission loss associated with the Power Transmitter;
and
protecting, by the Power Transmitter, against a fault of the Power Receiver when the power transfer amount is below a threshold during a power transfer phase.

3 more elements

A Power Transmitter, comprising:

a power transmitter circuit including an inverter and a primary coil to generate power for transmission from the Power Transmitter to a Power Receiver;
and
a transmission controller configured to:
obtain transmitter power measurements at an output of the inverter during a power transfer period,
calculate a transmitter power based on an average of the transmitter power measurements,
calculate a power transfer amount for the power transfer period based, at least in part, on a difference between the transmitter power and an expected power transmission loss associated with the Power Transmitter, and
protect against a fault of the Power Receiver when the power transfer amount is below a threshold during a power transfer phase.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/292,648Filed 8 Sep 2022 · us provisional application

Priority

9 Sep 2021

Published

US 2024/0348099 A117 Oct 2024

Granted

14 Apr 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H02J 50/12
Using inductive coupling: of the resonant type
H02J 7/60
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: including safety or protection arrangements
H02J 7/80
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: including monitoring or indicating arrangements
H02J 50/80
Circuit arrangements or systems for wireless supply or distribution of electric power: involving the exchange of data, concerning supply or…

Power transmitter protection for receiver fault in a wireless power system

Life of this patent

Power transmitter protection for receiver fault in a wireless power system

Life of this patent

Abstract

Claims26