Before the year ended I wet my system, and one of the BMS’s seemed to stop working.
Over the holidays I took it to my parents home, and wired it just because I was bored. I did a few runs, and everything seemed on check.
I’ve gotten back home, and tried the build again to notice that it doesn’t work anymore. It is strange because I get voltage from the battery, but when I turn on the E-Switch sometimes (most of the time) it doesn’t turn on.
I know this because I get 40.5V when its off and get like 41.2 or something like that when it turns on.
I think the E-Switch might be the problem. Is there anyway to find out exactly what it is, and how to fix it?
The thing is if I connect the focbox, sometimes it turns on and most times it does not, and when it turns on if I apply throttle the focbox goes off again.
Yeah so replace the eswitch to try to fix that particular issue, replace the wires too they’ve been known to be faulty, the first thing is not an issue
Sometimes I don’t even understand what I’m trying to say
Anyway, on board switch seems to be fine, I used a voltimeter between the fuse and the switch and that field is working properly.
I also unscrewed the board to check for burn marks or anything out of place, but I can’t find anything.
If you guys don’t have other suggestions, I might just hang this on my workshop as “First cooked BMS” maybe show it to my kids and grankids one day… Who knows…
Hmm… I’m loosing my mind over this. I just spend quite a while soldering cables back together to fit in my new enclosure, and also the new 10s BMS, everything was going great when I decided I was going to solder in the charge port and charge it and continue tomorrow… When all of the sudden, out of no where the damn FOCBOX turns on… By itself.
Thinking I had turned on the switch myself, I look for it, but no its off.
So I unplug the focbox from the power source (battery with bms) . Next I unsolder EVERYTHING again, and leave the battery leads going into the BMS, the negative wire from my battery pack to the -P (port whatever its called) and -B as output for the focbox.
So now without the switch even connected, I connect the power source to the focbox and still turns on by itself.
So I don’t know what the fuck is going on, and its quite annoying.
One bms does not turn on, and the other is on at all times.
The only weird thing I’ve done is attatch a velcro piece to the back of the BMS so it will stick to my board… I don’t know if stickers mess with the circuit which I doubt, and also there is a sticker there already. But I just don’t know what else to think.
Been talking to Lucy, and I’m going to write to her again.
You fried the switch probably i did the a simmilar thing few days ago connected charger minus to 10th balance lead and now its stuck on on state
Donna said its probably some pulse regulator thing
