Tesla Model 3 Rear Drive Unit Hacking

[royhen99]

WSB BSS138BK, WVS BSS84AK

[Jack Bauer]

That's great thanks so much:)

[Jack Bauer]

Working through the BOM ....

[Jack Bauer]

Latest schematic and PCB layout now on the githyb repo:
https://github.com/damienmaguire/Tesla- ... ter/Design

[Jack Bauer]

Needless to say if anyone has any info on the circuit or feedback etc would be much appreciated:)

[nkiernan]

Seriously impressive work, move your Salvador D, I'd hang this one the wall

[Jack Bauer]

[davefiddes]

Couple of comments on the video:

Seems like the STGAP1BS could be pre-supplied to JLCPCB like the QCA7000 on the Foccci for production runs of your board. Sure it adds cost but reflect that in what you charge for the board. No such thing as a free lunch.

I can recommend the "Fabrication Toolkit" from the KiCAD plugin repository. This creates the gerbers, BOM and position files in a form that JLC are happy with (and they recommend it). More details: https://github.com/bennymeg/Fabrication-Toolkit

If you want to make measurements on the Tesla gate driver behaviour with or without HV enabled this is entirely possible provided you are happy with fixed phase PWM values. I don't have a functioning inverter but the gate driver and PWM generation works fine. Shoot me an email if you want assistance.

[jrbe]

I second the JLC fabrication toolkit.
Check out the interactive html bom plugin as well, it's fantastic.

[Jack Bauer]

Appreciate that guys thanks. I have had some good feedback on the general pcb layout which I intend to address and had a few kind donations so was able to order from Mouser the bits JLC dont have as of now including the 1BS version of the driver chip.

On a related topic I got a tip on this and was very excited until I saw the price tag :
https://leandesign.com/pdf/Munro-Invert ... -Sales.pdf

If I hate one thing in this game its the duplication of effort.

Gonna guess no one will share any details on the design or schematic. Sigh....

[Jack Bauer]

Thanks to a good friend in Germany with a Prusa XL, we have a 3d printed prototype board for fit tests. Good news is it is a VERY good fit. Bad news is genius here totally forgot about the hole and pads for the HV connection hvil Would have been quite an expensive mistake even with bare boards.

[AMP3R]

A few days ago I had an idea to take another close look what the inverter sends to the vehicle CAN. And after poking around found something interesting. It turns out that there are many more ids with alerts and errors than I thought. By simple calculations edited the dbc file and when turned on the drive unit I was stunned.

Of course, nothing will work, because the DI_a174_notOkToStartDrive alert is active. The logic lacks 12 volts, which I supply from a regular ATX power supply. If this turns out to be the cause, it will be very funny. But it is too early to rejoice.