1) Handshake Initiation
The first phase of communication is started once the charger and vehicle are connected with the charging cable. The charging process has not yet begun at this point, i.e. current is not flowing. The connection is checked, and the vehicle informs the charger of the maximum permissible charging voltage.
2) Handshake Recognition
In the handshake recognition phase, the charger connection check is completed and general information such as the protocol version and vehicle information (battery type, vehicle identification number etc.) is exchanged.
3) Parameter Configuration
In the parameter configuration phase, the parameters of the charging process are negotiated. The vehicle informs the charger of the permissible amperage and voltage. The charger informs the vehicle of the available amperage and charging voltage.
If the requirements of the vehicle can be met by the charger, the charging process is started in the charging phase and the battery is charged. During the charging process, the vehicle informs the charger of the current charge status of the battery at regular intervals.
5) Suspension of Charging
In the suspension of charging phase, either side can terminate the charging process. Reasons for this can include the battery being fully charged or a fault occurring during the charging process.
6) End of Charging
In the end of charging phase, the charging process is terminated and the charger stops outputting power.
In each phase of charging communication, the charging process can be terminated in case of a fault. The charger then has the option of restarting the charging process.