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This valve (similarly to valves used e.g. in Tesla battery packs) incorporates a Gore film which allows the air to flow through, but not water to enter the pack.

You don't need any special laboratory controlled environment. Normal air conditioning is just fine. The battery breathes anyway; there's a breather valve right next to that CAN connector. If you end up splitting the pack just be careful not to push any sharp objects inside the pack while...

Found more bad cells from my pack. After "replacing" them I got my setup to power on and motor spinning! So it seems after all there's no latching alerts on BMS as @fsfs suggested. This is a big step for my project, now I can really start focusing on mounting the motor to my bike. I can't...

Today I had a chance to try my motor and VCU with a fully functional battery pack. It started straight away and heard the contractors in the pack to close. When I started yellow LED started flashing and when I put the gear on it started flashing blue and I was able to spin the motor by turning...

Unfortunately I could not find a way to edit my earlier message. You're correct, I should have highlighted that opening the pack can be lethal if you don't know what you're doing. You're also correct. If the cells get a lot below 3 volts they are permanently damaged and should not be recharged...

I've actually been in touch with them. They're using all original non-modified motors and batteries from a functional bike(s) so they've not faced similar issues to me. They advised to talk to Stark support. Tried that with no success...

I guess that's possible, if balancing is not working properly. I'll check if it keeps discharging the cells I connected. Anyway I think my next plan is to try to connect everything to a fully functional pack to see if it starts with that. This way I'd know if the issue is with battery or...

What do you mean with "whole P group"? You mean the four parallel cells? I have isolated those by cutting the cell wires and temporarily replaced with good working cells which are charged and balanced to the same voltage as others. Right now they are external to the battery and wired to the PCB...

Just saw the old post from 2019 regarding the Alta pack teardown - a lot of similarities on the pack design! https://electricdirtriders.com/threads/complete-battery-pack-teardown.988/post-13438

My first post here, and not even sure if it should be on Builds -section or here :) Just got a hint to come the this forum to check if anyone can help. So I have a build where I'm installing Stark motor to a small Suzuki moped from the 80's. Initially with a 1,5hp 50cc engine :) I bought a...