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[gt13013]

You can get the cell balance from the battery logs.
My bike has two 3.6 kWh packs, and there is a log for each pack. Here are the indications from these logs:
At the end of the experiment (with SOC 0% on the dash), and after some minutes of rest:
On the 1st pack:  SOC=1%, min=3137mV, max=3257mV, unbalance=120mV, PV=89437mV
On the 2nd pack: SOC=5%, min=3117mV, max=3287mV, unbalance=170mV, PV=89456mV

And just at the end of the experiment (before the minutes of rest), the two packs where at 89245 mV and 89268 mV respectively.

[herculeesjr]

Out of boredom and a little bit of miscalculating remaining range on a ride today I did a pretty good test of voltage cutoff. I was able to do 75mph on the interstate down to about 93v (under load) and it started cutting back speed right before my exit to about 70-72mph and it had nothing left to go faster. About ten seconds of regen to a complete stop and from there I was able to do 55-60mph till around 92v (again under load) where it started severely cutting back once I hit 91.5v, at that point I was able to slowly accelerate from another red light to 40mph, then it cut me to 35mph, then 30mph. Another red light and I'm sitting around 92v waiting for it to turn green, I gently accelerate and the throttle gives out and the bike dies. I pull over and key cycle the bike then very gentle acceleration it maxes at about 15mph and around 91v I finally make it home about a mile later.
I'll pull logs after I get a full charge, I got my Kill-A-Watt meter hooked up to the charger, but I'd say right now 92v is about where the bike is now rather iffy to ride. And I know to do a bit better planning and research further if a charge station is no longer in service and to have backup stations in mind, which was my case today of not planning for a bad charge station.

[victor6.7y]

@Herculeesjr

Lots of useful info in your test. Thank you for sharing!
Do you have an estimate of distance you have traveled after hitting 92v?

[herculeesjr]

I checked the Kill-A-Watt this morning and it showed 11.55kWh after a full charge. With the 2017 ZF13.0 battery nominal capacity being 11.4kWh I'd say my battery is pretty darn healthy.
As far as range I didn't record start and end mileage unfortunately since it was a few small trips throughout the week and then one big ride yesterday. I should be able to find out range ridden when I pull the logs though.

[herculeesjr]

@Herculeesjr

Lots of useful info in your test. Thank you for sharing!
Do you have an estimate of distance you have traveled after hitting 92v?

So from 0% on the dash, which equals about 5% on the BMS, I rode 10.5miles to a low of 90.911v. About 8 miles was 75mph on the interstate, about 2miles around 50-60mph, and half a mile at 30mph. It's difficult to say how far I went from 92v since voltage fluctuates, so figures based off percentage and me measuring routes on Google Maps are much more guaranteed.

[MVetter]

I checked the Kill-A-Watt this morning and it showed 11.55kWh after a full charge. With the 2017 ZF13.0 battery nominal capacity being 11.4kWh I'd say my battery is pretty darn healthy.
As far as range I didn't record start and end mileage unfortunately since it was a few small trips throughout the week and then one big ride yesterday. I should be able to find out range ridden when I pull the logs though.

The ZF13's nominal is actually 10.6kWh. 104Ah x 102v = 10608Wh = 10.6kWh

So either you were super deep into that pack or there were significant heat losses in the charger.

[Doctorbass]

A 2017 would use 29Ah cells. So if that 92Ah used is correct then I would assume 4x 28 cells in series for a total of 116Ah,

These are in reality marked at 28Ah directly on the brick   and not 29Ah.   Also 4x 28 cells is not in serie but in PARALLEL for a total of 116Ah,

Doc

[Doctorbass]

for those who are interested the kill-a-watt meter, the famous P4300 or p4400 can measure DC at the input! I have discovere that when they released the firsts unit couple years afo. and guess what? they display "DC" instead of the Hz frequency when Dc is applied.. so if some of you dont have any electronic load to measure the battery you can use that little kill a watt and a big hair dryer....

On all my Zero i have always  installed  a "cycle analyst", that great multi function EV display that i know well  since about 14 years. And i love it it give me max current, min voltage Wh, Ah, Wh/km, speed, can also datalog with GPS etc...

On my SR 2017 with PT i will have to rebalance the cells as the lasts recharge only reach 115.6V even though at slow charging .. probably that the pack balance is not great.

Usually i measure about 13.3 to 13.4kWh from 100% to 0.0000000% on the very well calibrated cycle analyst.

Doc

[TheRan]

A 2017 would use 29Ah cells. So if that 92Ah used is correct then I would assume 4x 28 cells in series for a total of 116Ah,

These are in reality marked at 28Ah directly on the brick   and not 29Ah.   Also 4x 28 cells is not in serie but in PARALLEL for a total of 116Ah,

Doc

I was just going by what the unofficial manual says, labelled as 28Ah but actually 29Ah. Also it's 28 in series to get the voltage, 4 of those series strings in parallel for the capacity.