Amazing job Got here from the YT homepage, hooray the algorithm is working I've been working for almost 3 years in EV charging, always from the perspective of an EMS provider, but even so many times had to go to lower level (SAE J1772/IEC 61851) and it is always nice to see all of these independent DIY projects. AC EV chargers are so simple in concept that it's hard to understand what some companies charge for such products
Hi, good question. You have mostly two requirements: - That one period of voltage is read with sufficient samples (so, sample during more than 1 ms). - Test with sufficient samples so that your function is fast enough to detect change in less than the time defined by standards to react to change. The value that I used is anecdotal, and I tuned it by experimenting. I haven't tested to the detail that it meets standards. I tested enough to know that it charges multiple cars every time with a simple happy path. If you like to make it work exactly like it should from international standards, I recommend reviewing each of the regulations, test for it and complete the code.
Thank you for such an easy to understand video. I'm thinking of swapping out the arduino with an esp32 so i can connect via wifi for remote operation and stats. I wonder if ESPhome would be sufficient for this.
You are welcome. I'm glad you liked it;) ESP Home does sound like a nice way to achieve your objective of controlling and monitoring the charging status.
Thank you! This is an AC Charging Station, meaning that it connects AC to the vehicle and then the vehicle is responsible for converting to DC via its onboard charger. In the case of external DC chargers, they can also be designed to charge at low currents.
Great question! That's exactly how charging balancing works. The charging station can change its duty cycle and the vehicle has 5s to comply with the new maximum allowed charging current.
I suppose you can make a 3 phase version of this. Just replace the RCB and contractor with 3 phase versions.
Exactly right!
Amazing job
Got here from the YT homepage, hooray the algorithm is working
I've been working for almost 3 years in EV charging, always from the perspective of an EMS provider, but even so many times had to go to lower level (SAE J1772/IEC 61851) and it is always nice to see all of these independent DIY projects. AC EV chargers are so simple in concept that it's hard to understand what some companies charge for such products
Thank you! Indeed, I try to demystify the complexity of EV Charging with this tutorial;)
Cheers!
Very well explained, popped on my YT algorithm - every now and then, you get a gem. :)
Very kind words, thank you!
Thanks for following up on this! Much appreciated!
My pleasure! Let me know if you have any questions about it, any time.
Great project ! I already ordered the components. How did you decide that in function findPeakVoltage you use while (i
Hi, good question. You have mostly two requirements:
- That one period of voltage is read with sufficient samples (so, sample during more than 1 ms).
- Test with sufficient samples so that your function is fast enough to detect change in less than the time defined by standards to react to change.
The value that I used is anecdotal, and I tuned it by experimenting. I haven't tested to the detail that it meets standards. I tested enough to know that it charges multiple cars every time with a simple happy path. If you like to make it work exactly like it should from international standards, I recommend reviewing each of the regulations, test for it and complete the code.
Thank you for such an easy to understand video. I'm thinking of swapping out the arduino with an esp32 so i can connect via wifi for remote operation and stats. I wonder if ESPhome would be sufficient for this.
You are welcome. I'm glad you liked it;)
ESP Home does sound like a nice way to achieve your objective of controlling and monitoring the charging status.
Nice vid! Cleared some old doubts of mine, and explained a lot more!
Do you know if it would be possible to do DC charge at low currents?
Thank you!
This is an AC Charging Station, meaning that it connects AC to the vehicle and then the vehicle is responsible for converting to DC via its onboard charger.
In the case of external DC chargers, they can also be designed to charge at low currents.
What will happen if you change the duty cycle during charging? Will the car adjust the charging current? Is that how charging balancing works?
Great question! That's exactly how charging balancing works. The charging station can change its duty cycle and the vehicle has 5s to comply with the new maximum allowed charging current.
Every off the shelf one dose this too on the inside with modules be careful as the lack of conformity testing can void the car warranty
Hi, indeed this is a way to start a charging station project. This is not a finished and certified product.
@@powercircuits I still like the project but this needs to be known.