Patent ID: 8796991

Claim:
As electric charging system that connects an electric charger and an electric vehicle via a charging cable and charges an electric storage device mounted on the electric vehicle, the electric charging system comprising: a supply-side processing unit for calculating supply-side processed data by applying a predetermined filtering process to a supply voltage, a supply current or a supply power in the electric charger; a receiving-side processing unit for calculating receiving-side processed data by applying a predetermined filtering process to a receiving voltage, a receiving current or a receiving power in the electric vehicle; a feature point assigning unit for assigning a feature point to the supply-side processed data and the receiving-side processed data by altering at least any one of the supply voltage, the supply current, the receiving voltage and the receiving current; a data synchronizing unit for synchronizing the supply-side processed data and the receiving-side processed data based on the feature point of the supply side processed data and the receiving-side processed data; and a determination unit for determining whether or not a conduction state between the electric charger and the electric vehicle is normal.