4 ms·

I was thinking similar thoughts the other day. I believe both J1772 & CHAdeMO essentially invite the external equipment onto your vehicle's CAN bus, based on my

I was thinking similar thoughts the other day. I believe both J1772 & CHAdeMO essentially invite the external equipment onto your vehicle's CAN bus, based on my (fallible) memory that my car's VIN, SoC, etc., have shown up on various external equipment's displays during past charging sessions. Interestingly, while stopped at a CHAdeMO charger operated by a network I hadn't used before I was allowed to charge for free based on it being my first time. (Presumably because my VIN had never been observed there.) It made me wonder that it ought to be fairly trivial to spoof one's VIN through the use of some kind of CAN bus proxy. -- edit: looks like I might be wrong about the CAN bus bit, but I do recall seeing my VIN & SoC show up on some EVSE displays. Perhaps it's a trick with the Control Pilot Signal?

danans 4y ago
> but I do recall seeing my VIN & SoC show up on some EVSE displays. Perhaps it's a trick with the Control Pilot Signal? You were probably using a CCS charger. Level 3 CCS chargers have a communication capability for stuff like vehicle id and state of charge, which enables plug-and-charge functionality. Level 2 chargers do not.
- nhecker 4y ago
  It was definitely not a CCS charger; my car will only play with CHAdeMO & J-1772. Aren't the only differences of CCS over J-1772 the addition of DC power pins at pack voltage, and the lack of populated AC line voltage pins? Or is there an alternate signaling protocol in use as well? I'll have to pay closer attention to the display the next time I'm at a public charger.