BMS Issues Please HELP

MartyGras said:

I have a 24 V battery and a Daly bms

When I check the voltage from one end of the battery to the other I get 27.1 V

when I short out the negative cables off the BMS and then plug in the balance leads it starts out at 27.1 V and then the voltage continues to drop until it reaches the 14 v range, if I check the voltage is the battery it’s still 27.1 V

I double check the continuity of every BMS lead and everything seems to be connected properly...... shut out the negative leads against each other and again it goes back to 27.1 V and then gradually drops

what am I missing here?
Thanks Gary

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pierre said:

M

Maybe you have done this already : Unplug the balance lead plug and with a DMM check the voltage with the Neg probe on the black wire and Pos probe on the 1st red wire after the black you should read about 3.2v . Each red wire in sequence after that will increase the voltage reading by +3.2v .

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BigVT said:

Had a similar problem, I just pulled out the balance cord connector and plugged it back in (while my main positive was not connected to loads, ln case it matters). I didn't at any point short any negative leads though, but have a 200a 48v Daly so maybe it's different?

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