openinverter forum

Does anyone know anything about hacking the BMW I3 BMS system?

I've had a look around and can't find much regarding to amateur systems that can read the information from of them.

The SimpBMS will work with the slaves from the BMW I3.

https://github.com/tomdebree/BMWI3BMS

Currently working on getting the balancing working, quite close now.

Thanks for that.
Your Simp BMS looks like an interesting module. Is it fully a open source project?

Not sure if I can help but I'm often in Bristol if you want an hand or even just encouragement with the balancing.

Not fully, hardware only V1 is opensource if you want to run it on just a teensy and can transceiver you can easily.

Thanks, that's interesting to know especially as I've got things like Teensys knocking about in the workshop.

I've also just spotted the Simp BMS thread so I'll read that before asking any more RTFM questions.

Sorry to jump in but it is related, can you use Simp BMS to increase the range?
BMW set a buffer of 80% I presume for longevity but as my project will only be used sparingly I am less worried about getting 150,000 miles out of a pack.
Would this just involve charging to a higher voltage?
Thanks

With SimpBMS, you control the contactors, charging voltage and minimum voltage. You can set it to run the battery down to 0V if you really wanted to... (There's probably not all that much energy available at the low end, but charging higher might get you a bit of additional range)

mjc506 wrote: ↑Tue May 10, 2022 1:30 pm With SimpBMS, you control the contactors, charging voltage and minimum voltage. You can set it to run the battery down to 0V if you really wanted to... (There's probably not all that much energy available at the low end, but charging higher might get you a bit of additional range)

Thank you