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XIAOXIANG BMS discharge cut

Druide

New Member
Joined
Jan 14, 2021
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4
Hi everybody!

I bought the XIAOXIANG BMS from Battery hookup and use it on a 12v 100 amp configuration. Everything seems to work fine, but occasionally, the discharge goes off on the BMS. No hi or low temp. No alarm. I can't see any reason. This happen once a week maybe. I've tried the load sense switch but don't seem to make a difference.

Any idea??
 
I think there is a area called functions? In there you should find a setting for switch. Try that one.
 
when you log into the device there are no events such as low cell voltage?
If the output mosfets just shut off with no event, hmm, sound like a suspect bms.
If it logged a transient low cell voltage that could be a loose balance lead but just shutting down, can you leave a pc connected to the bms and log everything going on that way?
 
when you log into the device there are no events such as low cell voltage?
If the output mosfets just shut off with no event, hmm, sound like a suspect bms.
If it logged a transient low cell voltage that could be a loose balance lead but just shutting down, can you leave a pc connected to the bms and log everything going on that way?
I dont see anything wrong with the log. I suspect the BMS.
 
A cell that is a lot lower than the others could cause that.
If not that then a bad connection could also cause it.
If you are absolutely sure it's neither of those then I do think it's possible to get a bad BMS.

That said....at what discharge load, in amps? Light load or heavy load?
And...can you charge the battery at that rate without it disconnecting?
 
A cell that is a lot lower than the others could cause that.
If not that then a bad connection could also cause it.
If you are absolutely sure it's neither of those then I do think it's possible to get a bad BMS.

That said....at what discharge load, in amps? Light load or heavy load?
And...can you charge the battery at that rate without it disconnecting?
what difference would be enough for that cell being lower to cause that?
 
A cell that is a lot lower than the others could cause that.
If not that then a bad connection could also cause it.
If you are absolutely sure it's neither of those then I do think it's possible to get a bad BMS.

That said....at what discharge load, in amps? Light load or heavy load?
And...can you charge the battery at that rate without it disconnecting?
My bms sometimes disconnects on heavy load. Any reason why?
 
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