The only way of knowing if a cell group hits HVC before any others is to charge as far as poss then open the battery to get all 10 cell group voltages to see if a problem does lay there.
Joycube JCEB360-11 battery
- Thread starter Tazmantic
- Start date
It looks then that the BMS has a 4.15v balance set for each cell group, so all looks/appears to be fine then. The manufacturer possibly looking at slightly longer cell longevity by not taking the charge to the max, the mah capacity lost is small and will be less then 100 mah one would expect.
Thanks so not to worry about the 5th led on the test button then though I’m sure it used to light, will have to see what happens after I’ve started using it again.
but one thing I’ve noticed as it’s 36v should it not have 10 cell groups (10s) and thus should there not be 11 wires on the balance plug mine only has 9 wires??
cheers
but one thing I’ve noticed as it’s 36v should it not have 10 cell groups (10s) and thus should there not be 11 wires on the balance plug mine only has 9 wires??
cheers
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You should always measure the cell voltages from the common ground. That will tell you where your missing voltage is.
Thick black joined to the cell-pack. Not the black joined to the battery terminal because it's switched by the BMS.
Measured cells again and each group is 4.15v and from the ground to each group the voltage rises by 4.15v (8.3v, 12.45v, 16.6v etc) till I get to the last set and 41.5v so its looking like the charger will only charge to 41.5v.