The invention relates to a protection circuit capable of automatically disconnecting a mains supply and a load after an electric vehicle charger is fully charged, the current electric vehicle charger technology has a defect that the connection with the mains supply and the load cannot be automatically disconnected after charging, and the circuit disclosed by the invention can make up the defect that the circuit consists of a starting switch S1, a relay j1, a triode Q1 and resistors R1 and R2, a commercial power input line is disconnected from a circuit board, a two-way starting switch is connected in parallel with two-way normally open contacts in a four-way relay and then connected in series to a breakpoint, a load output line is disconnected from the circuit board, and the other two-way normally open contacts in the relay are connected in series to the breakpoint, so that the commercial power and the load are disconnected from the circuit board by the relay. The triode is a control element of the relay, the base electrode of the triode is connected with the positive electrode of the red light, the starting switch is pressed down to connect the mains supply during charging, the relay connects the mains supply and the load when the red light is on, the starting switch is released to continue charging, and when the red light is off after charging, the relay is disconnected, namely the charger is disconnected from the mains supply and the load.

    电动车充电器充满电后能自动断开市电和负载的保护电路,当前电动车充电器技术有一个缺陷,就是充完电后不能自动断开与市电和负载的连接,本发明的电路能弥补这一缺陷,以图1说明:电路由启动开关S1、继电器j1、三极管Q1和电阻R1、R2组成,先把市电输入线从电路板上断开,将二路启动开关与四路继电器中的二路常开点并接后串接到断点中,再把负载输出线与电路板断开,将继电器中另二路常开点串接到断点中,这样继电器就把市电和负载与电路板断开了,三极管是继电器的控制元件,基极接到红灯的正极,充电时按下启动开关接通市电,红灯亮时继电器接通市电和负载,这时松开启动开关充电继续,当充完电红灯灭时,继电器断开即是充电器断开了与市电和负载的连接。


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    Title :

    Protection circuit capable of automatically disconnecting mains supply and load after fully charged electric vehicle charger


    Additional title:

    电动车充电器充满电后能自动断开市电和负载的保护电路


    Contributors:

    Publication date :

    2024-09-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / 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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