If you have the equipment, try to determine capacities of the cells and use repackr.com to shuffle them for least divergence in the p groups. I did this for the Blutstern battery and it works great, battery is in almost perfect balance. Of course you have to monitor this battery more than one made of new cells.
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Ok Iâm at a loss. How damn close do I need to get the cell voltages in order for the BMS to engage balancing? It isnât in the spec sheet but they are all at 4.01 to 4.07v.
Do I need to go closer?
Bestech 12S 80A bms D223V1 I believe.
it has just been shutting off and the light goes green instead of balancing.
I left it going with the green light to see if something happens.
Obviously nothing tho, just the pack voltage coming from the BMS.
My D140 could barely balance cells that were all within 0.02v of each other, good luck man.
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I would conside that to be balanced
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Whatâs wrong with the pack? If its not broken, Iâd leave it alone, sell it complete and put the cash toward some new cells.
This is the deal breaker for me.
For the effort, risk and potential payoff, I just get new cells.
the NESE changes things, I wonder if you can shove the cells in there with the nickel trimmed but still on there.
Good luck
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Testing nickel
Got 10*2 nickel shipped overnight.
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Thanks, I emailed bestech to ask about that spec for balancing but I will get them all to ~4.05v.
|Balance/Equilibrium|Balance voltage for single cell|4.20V±0.025V| <- huh maybe itâs this spec .025v
The bms that I have come across all seem to start balancing at 4.15.
Usually you can also ask the manufacturer for a custom setting for balancing.
The smart bms from AliExpress can be customized and so can the diebiems. I recall the default balance setting on the diebiems to be 3.80 and I have my smart bms set to start at 3.5.
On the smart bms you can also decide whether you wish it to balance while charging or to balance statically only.
I like the static balance. So far it doesnât seem to drain the battery much either.
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Not sure if this has been discussed before, but one thing I always keep in mind when it comes to the BMS and balancing, is itâs balance current, for the most effective balancing and to not burn out your BMS, make sure the current your charging at by the time it starts balancing is equal or close to the balance current. if itâs too high the resistors canât mitigate more than theyâre rated for, they heat and burn, and cells get over charged
Update regarding my meepo 10s4p battery upgrade, its successful!
Went on a ride yesturday, feel like a normal meepo, only difference is normally after 4 miles I have just under 60 percent battery lifeâŠwith my upgrade I had 86 percent after the same 4 mile ride
I used 3200mah 10A cells. Next step is probbaly upgrading the esc to a vesc, something small like make maker x dual. The battery can only do 40 amps continues. That should be plenty tho!
Also I am thinthinking I can probbaly get like 10-15 full charges for my phone out of this battery lol.
Charger stopped charging battery at 99% indicated capacity
Meepo website says their indicator is +/- 3% accurate. I dont have a voltage meter on me. But this looks good! Original meepo battery stopped charging at the same battery level indication
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Go the other way. Power the board with 10-15 phones.
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This! yes! iphones!
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Coming soon: the most expensive eskate ever existed
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Oh boy. Canât wait to see where that goes lol
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Puhhh, a lot of welds!
What do you guys use to protect the battery against vibration? Im gonna use fishpaper between the p-groups, but what for the whole pack? Neoprene? Or some kind of non flameable foam?
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OK idk what the fuck is going on. Got them all at 4.02 to 4.04 and no dice still. Instant green light when I plug in the charger and switch it on.
Then I was like whatever Iâll just charge them all to 4.2 and run a cycle like that, but the moment I started using my Imaxb6 to charge the first cell it instantly said full⊠So maybe this is part of the issue my BMS is having.
Really confuzzed pls help
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hobbyking sells cheap double sided adhesive foam in different thicknesses.
Wonder what their shipping times are like right now.
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lets see some pics pal and show us voltage levels of your p groups
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Thanks man! I need cables too, so hobbyking is a really nice option!!! 
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