Quick charge project

[tinilk]

Sefs, it's been fascinating watching the progress on your project. It's very inspiring and helps dissuade my tendency to think of the FFE's electronics as a bunch of inscrutable black boxes wired together.

I'll bet if you're willing, someone on this forum would happily pay whatever your asking price would be for the charger setup (and perhaps sign a disclaimer promising not to electrocute themselves).

Enjoy your new ride!

[triangles]

Enjoy the new Tesla. What config did you go for?

[sefs]

Enjoy the new Tesla. What config did you go for?

I went with Red, AWD, sport wheels, black interior, EAP, and FSD.

[martii]

Here is what I see on the can bus during charging

https://youtu.be/XNThKLELEGs

[martii]

So my main question is as I use SavvyCAN to do decoding - what IDs I need to look at to make contactron close to make battery available for charging.

[martii]

Just compared 2 CAN sessions, IDLE and plugged in. Turns out that the only new CAN messages were 0x400, 0x405 and 0x40a. Will have to check those closer.

[Dobrinia]

sefs ,
Can you sell your work, or show the scheme / sketch / firmware and controller?
How to add two 6.6kW inverters to the car to be charged from a 3-phase outlet?

[martii]

OK so I have found some time to play with CAN as it gets warmer. My method is kinda brute force. I'm replaying messages previously recorded at different car state (like SOC, weather). I don't see people are willing to share the knowledge so I will do - as there is so little known about FFE CAN and everybody looks to be happy with Forscan so far.

0x178 is outside temperature - there might be some more information encoded there - I don't know what bytes do what but will find out later.

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0x24C is SOC - when I did inject previously recorded can messages I did get this:
https://youtu.be/HW4CvpDTiCM

still don't know the bytes and stuff but will find out soon. This one alone is enough to do safe DC charging IMHO.

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0x352 - tells about time to full charge:
https://youtu.be/cka7UdCSV_g

Sometimes I got wrench with See manual information.

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Replaying 0x416 does this Christmas tree effect:

https://youtu.be/lmF_sN0j_7A

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Still will be looking for individual cell voltages and other stuff like that but so far I'm closer to my solution.

Cheers
Martin

[martii]

sefs ,
Can you sell your work, or show the scheme / sketch / firmware and controller?
How to add two 6.6kW inverters to the car to be charged from a 3-phase outlet?

I think it was mentioned before that you can't charge faster than 11kW via AC as car will get into faulty state.
All you can add is 3.3kW charger like sefs did - otherwise you need to charge it directly when car is on (and car accepts such current as also sefs tested it already and it worked fine).

Martin

[triangles]

Nice work! Glad to see someone working at figuring out how things work on the FFE.