so i'm back on the idrive this week, since the dh comp is in repair. such a different ride. so high up now! tighter suspension..
anyway, i had a long errand after work yesterday and had to ride 21 miles! and without a CA!
i was late for an appointment at the end, so i got a good workout, going on speed 1 (15mph max) most of the way. considering normal driving uses about 1 to 1.5Ah per mile and the old pack had maybe 8Ah tops, i was asking a lot, pedaling hard, knowing i could hit the cliff anytime...
thankfully towards the end, i remembered that i had my lipo buzzers
which hooks up to the pack db25 and it alerted me in the last 1/2 mile that one cell was hitting 3.2V under load.
that pack always had a runt cell, so i wasn't terribly surprised, and my balance charge cable hasn't been working, so it hasn't been balanced since 2011.
here are the no load voltages at the end:
and here's the video, fwiw, from which i got the numbers:
i think cell in the top left pack is the runt, and it'll be interesting to check the IR of cell 4 from the other packs.
why are they low? do they coincidentally happen to be runts in their cell groups?
or have they been working extra hard to balance up the runt from the topleft pack, and are consequently overworked? what's the explanation? i sort of figured that when cells were paralleled, they'd balance themselves out?
i kinda expected the runt would be in the top right pack, which looks likes it's been getting poked by the locknut!
i think this dent is somewhat recent, the pack may have gotten mishapen recently. anyway, they may be tougher than we thought..
after 3.25hrs on the balance charger (set to charge up to 4.2v/cell):
after 4.5hrs on the balance charger: