Waynemarlow
10 kW
I have two packs, a 14S2P and a 13S2P ( EBike ) that have been damaged with a similar outcome, but albeit with different causes. Both batteries have been fully discharged and then left with a very low current attached over a period of time. Both packs the group of cells nearest the negative terminal have been discharged totally to around zero damaging the cells. The next group up the chain is discharged to about 0.45V and so on up the pack until the BMS cutoff of 2.75Volts is reached at about the 5 /6 pack.
One pack was in an EBike and the other attached to a down voltage convertor ( 12 volts in a camper van ).
My question is that I would have thought that the BMS low voltage circuit would have kicked in and cut the low current draw off from the pack. Have I just been unlucky and had faulty BMS's not doing their job or is there another reason that I'm not aware of allowing small currents to be drawn from the pack ?
Thanks.
One pack was in an EBike and the other attached to a down voltage convertor ( 12 volts in a camper van ).
My question is that I would have thought that the BMS low voltage circuit would have kicked in and cut the low current draw off from the pack. Have I just been unlucky and had faulty BMS's not doing their job or is there another reason that I'm not aware of allowing small currents to be drawn from the pack ?
Thanks.