The invention discloses a wireless charging foreign matter detection method which comprises the following steps: a prefabrication step: before wireless charging work, connecting each capacitor in a sensor group arranged at the ground end of a wireless charging system to a working circuit in sequence, and measuring and recording electrical parameters of the working circuit in sequence as prefabricated electrical parameters; a detection step, when or after wireless charging work is started, connecting capacitors in a sensor group arranged at the ground end of the wireless charging system to a working circuit in sequence, and measuring and recording electrical parameters of the working circuit as measured electrical parameters; and a comparison step: after the detection step, sequentially comparing the measured electrical parameters with the prefabricated electrical parameters, judging whether the comparison result exceeds the range or not, if so, adjusting the working frequency of wireless charging, and marking the capacitance corresponding to the comparison result exceeding the range, otherwise, returning to the detection step. Foreign matters can be directly and efficiently found by directly using the influence of the temperature on the capacitance value, the detection precision is relatively high, and the environmental interference is small.

    本发明公开了种无线充电异物检测方法包括:预制步骤在无线充电工作之前,依次将设置在无线充电系统地面端的传感器组中的每个电容接入工作电路,依次测量并记录工作电路的电参数,作为预制电参数;检测步骤在无线充电工作开始时或开始后,依次将设置在无线充电系统地面端的传感器组中的每个电容接入工作电路,依次测量并记录工作电路的电参数,作为测量电参数;比较步骤在检测步骤后,依次将测量电参数与预制电参数比较,判断比较结果是否超出范围,是则调整无线充电的工作频率,并标记比较结果超出范围的对应的电容,否则返回检测步骤。可以直接运用温度对电容值的影响,直接高效的发现异物,具有较高的检测精度,受到环境干扰小。


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    Titel :

    Wireless charging foreign matter detection method


    Weitere Titelangaben:

    无线充电异物检测方法


    Beteiligte:
    WANG ZHE (Autor:in) / LU JUN (Autor:in) / HE FANBO (Autor:in) / GE JUNJIE (Autor:in) / MA JUNCHAO (Autor:in)

    Erscheinungsdatum :

    2021-12-31


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    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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