Good morning All,
BMW I3 battery pack is superbly engineered.
I have had now 3 packs so far for re-sale
Pack contains 8 modules of 12S prismatic Samsung SDI cells, now 96Ah.
The bush bar connecting these cells is made of aluminium, and high frequency spot-welded onto the terminals.
The module is made of an aluminium encasing in which the prismatic cells have been "glued".
I have found no way to dismantle the modules into single cells.
I have drilled out the spotwelded bush bars, tried with force to dismantle the module etc, and gave up.
actually destroying a perfect module.
Have a look at this link from 1:18minutes to see how I copied what Munro did.
https://www.youtube.com/watch?v=YZ9UpLkVJlo&t=14s
nV of prismatic cell = 3.76V x12S =44.04V @96Ah 4.2Kwh. per "new" module
but all cabling is made of aluminium strands too, sure this should work, but me I was used to copper.
So the module/unit could be converted to solar storage, but one does need to find a way.
Next thing is the bms, I suggest people should have a look at batrium.com
https://www.batrium.com/products/watchmon 1x per storage pack = master controller
https://www.batrium.com/collec…6s-8w?variant=30862985864 2x per BMW I3 module = cell monitor
Battery pack can be expanded by adding more BMW I3 modules in parallel, using only 2x RC6S-8W extra connected to the Batrium Watchmon
Batrium works with SMA SI series, + it can control a nice 48V emergency charger, Eltek Flatpack2
https://www.batrium.com/blogs/…k-flatpack2-with-watchmon
best regards
Carel Hassink