Patent ID: 8497660

Claim:
A charging system of an electric vehicle, comprising: a smart card having a user identification (UID) for identifying a user of the electric vehicle; a first rechargeable battery having first battery information and stored with the UID while installed in the electric vehicle, for providing electric power to the electric vehicle; a second rechargeable battery having second battery information and stored with the UID while the first rechargeable battery in low battery is replaced with the second rechargeable battery; and a charging station, comprising: a controlling module for confirming that the first rechargeable battery is stored with the UID and then allowing replacement of the first rechargeable battery with the second rechargeable battery; an updating unit for writing the UID to the second rechargeable battery while the first rechargeable battery is replaced with the second rechargeable battery; and a charging set for charging the first and second rechargeable batteries.