So I think I shorted my Daly BMS. Just got everything all finished, charge port and loop key and everything and went to plug in the BMS at the very end and got a spark near the end leads. I’m not readying any voltage through the XT connectors either. This is a 13s DALY BMS and I followed this diagram to wire it for 12s:
When checking the voltages through the balance plug, the voltages all check out for each group as they should, and the last two groups through the plug both read the pack voltage, which is 41.32V. Which makes sense because both my last 2 balance leads are soldered to the - of the last pack. Here’s my mess of a battery
what are you guys referring to here? I think all the wire colors are coordinated coorectly with polarity I was just reading the voltage with the probes swapped around
yeah I think I did wire it backwards. WTF it’s cause I usually solder my leads to the negative terminals but this time I did it to the positive and so I got everything all goofed up.
so just switching around the wires should fix it? Also, regardless of the BMS being wired backwards, would the XT connectors read voltage even without the BMS plugged in if the rest of the stuff was all soldered properly with good connections? Because I’m not getting the pack voltage through those either
I think I need to switch my neg and pos leads around too since I wired the charger and loopkey and all looking at the terminals wrong too. Good lord I really botched this one up. Good thing I’m not a surgeon
Yeah I have an extra one. So depin and repin the connector and then swap the main neg and positive leads around. Does that sound right?
Here’s before the maddness and after for reference and analysis.
