Electric car chargers aren't chargers at all – EVSE Explained
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Watson 打开家用交流充电设备,划出供电装置与车载充电器的分工。插头内的电阻等信号让车辆知道连接状态,供电和给电池充电分属不同部件。
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The car itself contains the battery charger.the proximity pilot and ground pin are connected via a resistor