how to test faulty bms

batteryGOLD

100 W
Joined
Dec 14, 2019
Messages
293
Location
PT Portugal
Hi people, check tha faulty new bms (I took one randomly from new lot, and got faulty. what is tha probability of any other bms,from same lot, same problem? or tha probabilty of find at least one workin from that lot? )

does not have high limit voltage cut protection, voltage at this debalanced S battery element is going more and more volts on charge, and it keeps chargin..
alth, those bms's, have a low cut protection tested at 2,0V.. is this crazy? :unsure:

working bms's will cut at max 4,23-4,25V
and low cut at min 2,5-2,7V


what brand are those? d*ly or copy? anyone knows about this??

ALLWAYS TEST ANY BMS'S

faulty bms.jpg
 
Last edited:
Even if you test a crappy BMS and it tests good today, it can easily fail tomorrow, because testing it doesn't stop it from being a crappy BMS. :ROFLMAO:
 
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