The invention relates to a charging safety protection circuit and a phase sequence detection method for charging pile, wherein the charging safety protection circuit comprises a zero line input end, alive line input end and a PE input end for accessing zero fire and a PE line, the PE input end is grounded, and the zero line input end and the live line input end are grounded through a resistor. The zero line input end and the live line input end are further connected with a first operational amplifier circuit and a second operational amplifier circuit, the first operational amplifier circuit is connected with the main control module through an L phase sequence detection output end, the second operational amplifier circuit is connected with the main control module through an N phase sequence detection output end, and a live line, a zero line and a PE line are connected into the charging pile. In the method, whether the PE wire is normally connected or not is judged firstly, and under the condition that the PE wire is normally connected, the main control module compares input voltages of the zero wire detection circuit and the live wire detection circuit, so that whether the phase sequence of the zero wire and the live wire is correct or not is judged, charging safety is ensured, and safety accidents during charging are effectively avoided.

    一种充电桩充电安全保护电路及检测方法,包括用于接入零火及PE线的零线输入端、火线输入端以及PE输入端,所述PE输入端接地,所述零线输入端与所述火线输入端经电阻接地,所述零线输入端与所述火线输入端还连接有第一运放电路和第二运放电路,所述第一运放电路通过L相序检测输出端与主控模块连接,所述第二运放电路通过N相序检测输出端与主控模块连接,充电桩接入火线、零线、PE线,先判断出PE线是否有正常接入,在PE线正常接入的情况下,主控模块对比零线、火线检测电路的输入电压,从而判断零火线相序是否正确,确保充电安全,有效避免充电安全事故的发生。


    Access

    Download


    Export, share and cite



    Title :

    Charging safety protection circuit and phase sequence detection method for charging pile


    Additional title:

    一种充电桩充电安全保护电路及相序检测方法


    Contributors:

    Publication date :

    2021-02-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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



    Charging pile charging protection circuit

    WANG MIN / JIN CHAOKUN / WEN ZHU | European Patent Office | 2020

    Free access

    Charging pile safety protection equipment

    HAN SHUXIAN | European Patent Office | 2020

    Free access

    Charging pile circuit and charging pile

    LI XIAOXIANG / DAI KANGWEI / BAI JIAN et al. | European Patent Office | 2021

    Free access

    Safety protection system of charging pile

    WU CHAO | European Patent Office | 2020

    Free access

    Charging pile plug self-adaption and charging safety protection circuit and application method thereof

    HUANG XINGJIAN / HONG DENGYUE | European Patent Office | 2021

    Free access