BMW i3 60ah specifications

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Darkwing

New member
Joined
Feb 10, 2021
Messages
29
Hi

I need help locating the specifications for the Samsung SDI batteries that is in the BMW i3 60ah battery pack.

I need to settings for my Victron Multiplus 48/5000.

All searches i do seem to point to the 94ah edition, and it is not the same.

What i need as a minimum, is lowest safe volt (ie 20% capacity) and highest safe volt (ie 90%).

If i can get the theoretical values i should be able to calculate the two values.

I have taken screenshots of the Victron Ve-Configure, to show what im hunting for. Values shown are BROKEN. DO NOT USE.



charger_zoomed.png
Inverter_zoomed.png


Assist_SustainVoltage_zoomed.png
Assistant_VoltageBeforeResume_zoomed.png

Assist_CutOffVoltages_Zoomed.png


Sorry for quality, i really should have taken screenshots... not cellphone pictures...

I have found this https://endless-sphere.com/forums/viewtopic.php?t=95222
Showing:
bmw_i3_60ah_specs.JPG


But these values are coming form a "random" ebay seller and is not 100% trustworthy.

I can see that the entire pack is defined as 355-360 volts, 8 strings of 12 cells. 96 in total.

360/8 = 45, but i measure 47,8x on them.

So can i assume that the 45 = 12 * 3.7 (Average volt) and that it is in theory 50% battery capacity

So theoretical max voltage for 12 cells/1 string is 49,2. And a safe would be around 48.6 to 48.8v.
And theoretical min voltage is 32.4 and safe minimum voltage would be around maybe 34 to 36 volt.

Hope someone can help me out here. Maybe Samsungs specifications, or the actual values to use for the I3 60ah battery in the victron equipment.
 

Darkwing

New member
Joined
Feb 10, 2021
Messages
29
Ok a lot of digging and i got a bit closer to target:
These guys seems to mention the same min/max voltage, and it lines up with what i have got. (2,7 and 4.1) i will add a buffer of 0.5 volt minimum to both top and bottom
 
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