Shouldn’t be much of a problem in a pack this small. But, here we are… lol. I am not sure if that was even the issue. I’ll never know, but i suspect it.
I didn’t find any burn marks, or any signs of damage. Just 5 cells with 0volts(an entire P pack).
Luckily, due to the way i wired my pack(by luck not design), the P pack acted as a fuse almost, and rendered the pack unuseable(so this didnt spread) after this happened.
Did you ever bulk-charge consecutively? Or did you always alternate with a balanced charge? Because alternating shouldn’t really be harmful at all – but trusting end-users or self to do that every other time is a recipe for a dead battery
I hadn’t balance charged in over 100 cycles. I had just checked all the cells about two weeks ago, all within 0.1v
Built a fresh new 10s5p for this beauty this last weekend. Much cleaner battery build this time around, more insulation and a better fit. Now complete with bluetooth bms, and no more box on top.
Nice upgrade, can I ask what your vesc settings are ? I’m Running same setup.
I setup my focboxs awhile go and haven’t changed them since. I am running 40 battery amps per foc box. I think I have motor max turned up to 80A. BLDC MODE. Sensorless. Vescs connected over CAN.
When I take a ride later today I’ll upload a pic from the BT app of my settings.
I’ve got a similar setup , trying to figure out how you got 34mph. I’m topping out at 25mph on 8” AT I’ve got dual Focboxes, 5065 200kv , 15T / 66T, 10s4p 30Q. Maybe my vesc settings aren’t up to snuff.
Full charge, air up tires to max. I got 34 when I was set to 50A per foc box (100 Battery Amp total). But Im on 10s5p i wouldnt go 100A on 4p
I may have to build a larger battery. I’m at 40a batt amp with 10s4p
I keep mine at 40A, I felt like it was too much strain on everything to go 20A per cell.
Almost two months since the new pack has been in. Still nice and balanced 
What BMS are you using?
This is the BMS i ordered: https://www.aliexpress.com/item/10S-36V-Lithium-Battery-PCB-and-smart-BMS-with-Bluetooth-Function-APP-software-42V-electric-bike/32879447246.html?spm=a2g0s.9042311.0.0.10a14c4drSrOgP
Surprisingly not many people here use it. I also found a huge thread related to this bms(and a few others like it) on endless-sphere: https://endless-sphere.com/forums/viewtopic.php?t=88676
EDIT: I bought the lowest amp one they had, as i am running it bypassed(charge/balance only).
next level stuff you got going on
Can you also limit how many volts the battery charges to?
Yea you can set it to whatever you want. Almost everything is adjustable.
Thnx for the link. I see it is the same I have ordered 5 days ago I have ordered the 12s 60A BMS. I hope it will work
This right here is badass.
Only if you have it setup for discharge too though.