How does AC (smart) charging actually work? PWM explained!

[Gregski]

very detailed explanation if you want to test your inner Geek

[Gregski]

Video Takeaways With Direct Links Back To The Video


Two Different Types of Charging Plugs

[Gregski]

The EVSE Can Show One Of Six Different States / or Statuseses


EVSE Status: A, B, C, D, E, F

[Gregski]

Status A

[Gregski]

Status B

[Gregski]

Status C/D

C = Charging
D = in the old days of lead acid batteries meant Charging with Ventilation

[tom91]

https://en.wikipedia.org/wiki/SAE_J1772 This has all the bits you are covering listed per topic.

[xvyDFatih]

How can we detect that an ac or dc charger is plugged?

very detailed explanation if you want to test your inner Geek

[tom91]

DC chargers go into 5% duty cycle, thus requesting digital communications instead of PWM.

[uhi22]

Yes, and AC chargers have two possibilities: Either use a higher PWM ratio, which defines the allowed current, or apply 5% and announce in the high level communication (IP, TCP, V2GTP, EXI) during the negotiation of the charge parameters that they support AC.