METHOD AND APPARATUS FOR DETECTING FOREIGN OBJECT FOR WIRELESS CHARGING SYSTEM, AND PROCESSOR THEREFOR

WIPO Patent Application WO/2023/051006

A1

The present invention relates to a method for detecting a foreign object for a wireless charging system. The method comprises: when there is no offset, collecting working efficiencies and duty cycles under different loads, and after a system starts to work, acquiring a working efficiency of a receiving end, so as to calculate the power of the receiving end; determining a fixed loss of the current system according to a working frequency and a duty cycle of a sending end and the power of the receiving end, so as to calculate a power loss of the current system; by means of a comparison relationship between the power loss and the difference between the power of the sending end and the power of the receiving end under the condition of no foreign object, determining whether there is a foreign object in the system; and the system executing corresponding working processing according to a determination result. The present invention further relates to a corresponding apparatus and a processor therefor. By using the method, the apparatus and the processor therefor in the present invention, the accurate detection of when a wireless charging system works at any position and there is a foreign object can be realized, and when there is a foreign object, the system can also work normally without a false trigger.

WANG ZHENLI (CN)
ZHOU TIANYU (CN)

PCT/CN2022/108968

April 06, 2023

July 29, 2022

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CRM ICBG WUXI CO LTD (CN)

H02J50/60

WO2012132145A1

2012-10-04

CN105334539A	2016-02-17
CN109952503A	2019-06-28
CN107107766A	2017-08-29
CN108092421A	2018-05-29
CN110168860A	2019-08-23

J.Z.M.C. PATENT AND TRADEMARK LAW OFFICE (GENERAL PARTNERSHIP) (CN)

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