reverse-engineered BMS, Teensy3.2 based, working with Tesla module oem slaveboard

Darkwing

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Feb 10, 2021
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8
I misunderstood anti islanding. Totally agreed that the system cannot be allowed to push power to a grid that is shutdown.
Will read Jens's example.

Thanks for your time and effort it is highly appreciated. One question you didnt answer, will one SIMPbms work for 8 bmw battery packs alternatively 6 Tesla, or is it one pr pack ?
 

CarelHassink

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Oct 21, 2017
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128
Really I want you to read the manual,
it's either or, but never mixed.
 

yasko

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Nov 10, 2017
Messages
58
Hi Darkwing,
If you have some time for reading, check my project here. It was inspired by Carel's idea of using EV batteries with HV hybrid inverters.
The system is working well, but it's still WIP, more like a proof concept.
And I have some concerns about using an HV system in DIY projects because HV DC is not a joke.
 

Darkwing

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Feb 10, 2021
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8
Thread read. I like the hv for the same reason as you. Closed package minimum involvement in cabling.
However i have taken Carel's advice very serious, and will try and see if i can make it work as a 48volt system i think.
I will loose the enclosure, dont think it will allow for a rewiring. With 6 tesla batteries i can use a hv inverter but stay well below the 500volt mark.
But still think that the 48 may be the right road for someone not educated in electricity.
I'm required by law to have an actual electrician perform final install, but i will be honest, i will need to prove to myself it works before i pay for an electrician. I will spend some time reading up based on Carel's information. Will return with final results and decisions.
 

Lykke

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Oct 6, 2019
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6
Darkwing, do you live in the Copenhagen area? I'll be happy to show you my setup and how I rewired the i3 batteries.
IMG_20210214_160330.jpg
IMG_20210214_160419.jpg
 

Darkwing

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Feb 10, 2021
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8
Hi Lykke
I would love to see your setup, and essentially run in your footsteps.
I can be reached at 20878138
Feel free to reach out anytime.
 

Aadithya2410

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Mar 17, 2021
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2
Hi. I have a doubt regarding a part in the SIMP BMS code. I am not sure if this is the right place to ask but could someone please explain why there are only 5 Module ID requests when there are in total if I am not wrong, 8 Modules for the BMW i3 Pack. I was assuming this part of the code is to detect the module ID to establish communication. Any help is appreciated, thanks...

1615995359625.png
 

Aadithya2410

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Mar 17, 2021
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2
Lykke,
small team working on it, Even in Norway, Tom in UK, Daniel and me in Holland,
actually 2 separate projects
1) getting the SIMP to talk to SMA SBS series
2) getting the SIMP to talk to the BMW cmu's

2) We have slow progress, thanks to Kai we now have the full can database of the BMW i3, but that was just 2 weeks ago
1) we bought a BYD 6.4 HV battery and a SMA SBS6 to hook up a can sniffer, Even from Norway would log into my home network to crack code etc.
that didn't work to well, so now we have moved all kit on pallet to Norway, and have it at Even's place.
Hopefully that will speed up process.

All code will be on Github when ready,
latest scores are GS YUASA LEV50N cmu (iMIEV etc), VOLT/Ampera cmu:
https://github.com/tomdebree

best Carel
Hi. I am also planning take up similar projects and am really interested to know about possibilities of getting the BMWi3 can database, dbc files of Modules, and Module IDs. Any help would be highly appreciated. Thanks
 

CarelHassink

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Oct 21, 2017
Messages
128
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Aadithya

I can tell you SIMPbms does work with BMW13 +i8 CSC modules but to a max of 8modules ( max 8 ID's)

Code on Github is what is shared.

Unfortunately I had to ditch efforts to try developing code to make the SMA SBS HV-inverters work

Just a friendly word: where did you purchase your SIMPbms??,

Carel

 
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