Setting Low voltage cutoff for 52v system on BBS02

Tmiller

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Dec 25, 2021
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Just finished my build with a BBS02 with a 52v battery. I have been programming and tweaking the settings. I purchased from a vendor who set up some programming before I got it. Was asked for Agressive/moderate riding and chose moderate. I assume the voltage for the cutoff was matched to the 52 volt battery. As I was using the programming tool and did a read of the stock settings to save to my PC, I noticed that the low voltage cutoff was set to 43. I changed it to 46 for a 52 volt system. When I went to write the settings, I got an error stating that the field was out of range. It would not accept anything larger than 43, This is where I have the setting now.

Thoughts?
 

HumanPerson

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set it to 41 or 40
i havent checked but i believe mine is set to 38, i ride it down to 40v before i even think about charging it.
 

Tmiller

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I have a chart that shows a 52 volt battery dead at 45 volts. How can a setting of 38 work without causing a massive under voltage of the 52 volt battery?
 

HumanPerson

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i guess i may be confused
are you asking what the low voltage cut off is? there are a few variables there but for the most part
a 52v ebike battery low voltage shut off is anywhere from 41v down to 35v, depending on the
battery composition and the bms ..etc..etc..etc..
 

HumanPerson

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It really all depends upon the battery cell chemestry, like the chemical composition, along with the BMS, if that makes sense.
It's weird really
 

HumanPerson

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and the brand i'd think....seems like the cheap ones are hit and miss but some of the samsung and panasonic are good...or so others say.
very strange these batteries
 
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