calarco68
10 W
ok . what should I do...
Thanks
Thanks
Signalab (ping) BMS install
- Thread starter calarco68
- Start date
999zip999
100 TW
I would take a 12v tail light blub and drain the high cell to 3.6v now. This is the job of the sense wire is for to shut off the bms at 3.8v or so. Cells should not go above 4.0v so drain.
calarco68
10 W
4.42 went down. 4.11. Took 3 hrs. So a bms can take voltage from one and distribute the overload to the underload cells? Wow, that is pretty cool.
I'll do the bulb thing now. THANKS
I'll do the bulb thing now. THANKS
dnmun
1 PW
no, the BMS doesn't take the charge and move it to another cell, that cell is just overcharged, by about .6V so it may be dead now.
the leds will not tell you it is overcharged. it shoulda been apparent the cell was not connected when you measured the voltages at the sense wire plug initially. should never have gotten to this point.
you should already have sheet with the voltages of each cell written down so you can track them. the voltage shoulda dropped rapidly if it was connected to the shunt resistor, so not sure why it took so long. you may still have bad wiring.
the leds will not tell you it is overcharged. it shoulda been apparent the cell was not connected when you measured the voltages at the sense wire plug initially. should never have gotten to this point.
you should already have sheet with the voltages of each cell written down so you can track them. the voltage shoulda dropped rapidly if it was connected to the shunt resistor, so not sure why it took so long. you may still have bad wiring.
999zip999
100 TW
I wish there was a better check list of what to do with these installations and whoops your should have done this first. Is the way it seems to be. GOOD LUCK. Write it down. Voltage per cell. It's not for us. It's your guide.
calarco68
10 W
Thank you all very much. My first pack. Learned a lot from you guys. Cant wait to build my first pack from the ground up.
Its all in this wonderful forum.
Its all in this wonderful forum.
999zip999
100 TW
Is you 4.4v cell o.k. 3.6v is fully charged after bms bleed down
999zip999
100 TW
Calarco68, Please keep us informan if you got that to work. That's a V-power pack ?
calarco68
10 W
Not sure what kind of battery it is. It was donated to me. Used once. I recharged it directly over the summer without a BMS. I am going to discharge it with some 12v 75watt bulbs lights.
Chris
Chris
999zip999
100 TW
O.k. You are balancing the pack so to do so the cells should be close. The high cell needs to come down put little 12v tail light bulb on the high cell watch it so to get in line will the other cells first. At that time you can put a load on the complete pack. Given you have some voltage in it check first.
calarco68
10 W
Great advice, thanks. I'll Let you know how the discharge goes when I finish with the 12v light balance on the overcharged cells. I thought of draining the whole pack 48v 20amp and all, to a 82v 410 watt bulb. To much draw? Never good at math.
999zip999
100 TW
Good I have used a 60w blub from the house. Maybe a 40w might be better. For load. Now this a test and you are Boris you are in charge. I don't know how far you should discharge so checked voltage and balance.
