When you plug in your car, a quiet digital conversation begins. In this Part 1, we'll cover who’s talking, and why seamless charging is harder than it looks.
Hi Santhosh, if there is no Plug & Charge implemented, then the EV and the charging station can still use the digital communication protocol ISO 15118 (for AC and DC) or DIN SPEC 70121 (for DC), if that is implemented on both the EV and the charger. If no digital communication protocols is implemented on either side, then the EV and charger use analog signalling based on the IEC 61851 standard, using pulse-width modulation (PWM) signals (although that only works for AC charging).
The communication between the charger and the backend (the Charge Point Management System) still runs over OCPP (the Open Charge Point Protocol).
How does the existing system without plug and charge. Can you explain who talks to whom in that case? How does it work without certificates?
Hi Santhosh, if there is no Plug & Charge implemented, then the EV and the charging station can still use the digital communication protocol ISO 15118 (for AC and DC) or DIN SPEC 70121 (for DC), if that is implemented on both the EV and the charger. If no digital communication protocols is implemented on either side, then the EV and charger use analog signalling based on the IEC 61851 standard, using pulse-width modulation (PWM) signals (although that only works for AC charging).
The communication between the charger and the backend (the Charge Point Management System) still runs over OCPP (the Open Charge Point Protocol).
Hope that clarifies your question.
Best
Marc