this is probably a problem with a cell or cells in the battery not being equal to the others, in capacity, resistance, etc., so they run low before the others do.Chewy said:The problem is I only get half range out of my battery as the motor turns off at 35.5v.
you can often fix them temporarily by leaving them on the charger for a few hours, days, or weeks, depending on how bad teh imbalance between cells is, while the bms does it's job of rebalancing cells, draining high ones while low ones charge up to match.
but if a pack has a balance problem, then it does mean the cells no longer match each other, and some will always run out before others, reducing pack total capacity and system range. the only permanent fix is to replace teh problem cells with ones that match or exceed the better cells in the pack. or replace the entire pack with one that has matched good quality cells that won't become imbalanced until they age enough to begin drifting apart in resistance / capacity.
but you don't want to lower the overall bms lvc; it should already be set to match the cells' lowest safe voltage.
lowering the bms lvc will simply invite permanent damage to your cells that increases risk of fire that can happen at any moment, charging, discharging, or just sitting there.