Title:
FOREIGN MATTER DETECTION APPARATUS AND METHOD, AND WIRELESS CHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/045717
Kind Code:
A1
Abstract:
Provided in the embodiments of the present application are a foreign matter detection apparatus and method, and a wireless charging system. The foreign matter detection apparatus comprises a coil layer and a foreign matter detection circuit. The coil layer comprises a plurality of coil groups, which are arranged on the same layer, wherein each coil group comprises two detection coils which are symmetrically arranged, ends, which have the same polarity, of the two detection coils are connected to each other, and the other ends, which have the same polarity, are respectively connected to the foreign matter detection circuit. The foreign matter detection circuit is used for detecting an induction signal, which is generated by each coil group in a detection magnetic field, and then detecting, according to the induction signal, whether there is a foreign matter between a transmitting coil and a receiving coil, which are coupled to each other, wherein the detection magnetic field is a magnetic field that is formed between the transmitting coil and the receiving coil. By means of the present application, the mixing of a metal foreign matter during wireless charging can be accurately detected, thereby improving the charging efficiency and the charging safety; moreover, the cost is relatively low.
Inventors:
CHEN DESONG (CN)
LIN HANDONG (CN)
YU CHANGHONG (CN)
LI WEI (CN)
JIANG TAO (CN)
SONG JIANGZHU (CN)
JIANG LEI (CN)
ZHANG XINGSHUO (CN)
LIN HANDONG (CN)
YU CHANGHONG (CN)
LI WEI (CN)
JIANG TAO (CN)
SONG JIANGZHU (CN)
JIANG LEI (CN)
ZHANG XINGSHUO (CN)
Application Number:
PCT/CN2023/096900
Publication Date:
March 07, 2024
Filing Date:
May 29, 2023
Export Citation:
Assignee:
CHINA FAW CO LTD (CN)
International Classes:
H02J50/60; H02J50/12; H02J50/40; H02J50/70; H02J50/90
Foreign References:
| CN115347689A | 2022-11-15 | |||
| CN109787376A | 2019-05-21 | |||
| CN106560730A | 2017-04-12 | |||
| US20190058349A1 | 2019-02-21 |
Attorney, Agent or Firm:
KSK IP AGENCY (CN)
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