This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit may obtain an induction signal generated by each detection coil; determine an abnormal-value threshold of each coil group based on induction signals that are of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, determine a signal threshold of each coil group based on the induction signals of each coil group; and detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object. The technical solutions provided in this application may improve wireless charging safety.


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    Title :

    FOREIGN OBJECT DETECTION METHOD AND APPARATUS, AND WIRELESS CHARGING SYSTEM


    Additional title:

    VERFAHREN UND VORRICHTUNG ZUR FREMDKÖRPERERKENNUNG UND DRAHTLOSES LADESYSTEM
    PROCÉDÉ ET APPAREIL DE DÉTECTION DES OBJETS ÉTRANGERS, ET SYSTÈME DE CHARGE SANS FIL


    Contributors:
    TANG CHUNSEN (author) / WANG ZHIHUI (author) / WANG YAOYI (author) / BAI PENGFEI (author) / WANG ZHENZHEN (author) / CAO JIAKAI (author) / KUANG WEI (author) / WU ZHIXIAN (author)

    Publication date :

    2025-01-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01V Geophysik , GEOPHYSICS / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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