This morning I did a little inspection for my bike at the same time as I installed a new tiny 12V lithium battery to replace the heavier lead-gel battery I had in the bike. Since this 12V battery is only used for “ignition” and the DC-DC (with 400W out) will handle the actual load in use, this battery can be really tiny. So I installed a 1.7Ah LiFePo4-battery (with it’s own integrated balancing). So far so good.
While stripping down the bike, I inspected the traction pack voltage again. And it would seem to be in pretty good balance, about 3.35V per cell (total 83.9V) with minimal deviation, when charged full and it has waited for a couple days. Looking good.
Early morning temperatures have been below zero and there has been some ice on roads so I haven’t yet started using the bike for commuting. Next week looks promising, as morning temperatures should be well above freezing.