question

sjoste avatar image
sjoste asked

Blue LED active on VE.Bus BMS (low cell)

I got the blue led shining (low cell warning) on a VE.Bus BMS (the old one).

Yesterday I took the battery apart (Victron 200Ah, non-smart with 4 winston cells) and demounted the BMS. All cells were equal at 3.44V. Found some oxidation at the negative pole and thought that was the issue (BMS reading one low cell due to oxidation/bad connection).

Put everything together and connected it to the BMS again, blue led (low cell) is still active. :-(

Also searched for bad connections after this without result.


Any ideas?

Lithium BatteryBMS
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2 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

Blue = good
Red = bad

Blue shows that all cell voltages are 2,8V or more.

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sjoste avatar image
sjoste answered ·

Damn, those comparators fooled me again....

So to the million dollar question, why does the Multiplus fail to charge with more than 120W? I thought the ve.bus bms was restricting the charge because a low cell...

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