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Qnbbm balancer question
#11
They Will have the high pitch without any higher current being transferera.
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#12
(04-15-2019, 09:37 AM)daromer Wrote: They are in epoxy yes. Dont insulate them more because they get hot when used.

if you dont like the sound just get better balancers directly or a proper bms.

In your video you recommended the qnbbm balancers (thx for the nice video, it was very helpfull Smile ), so which active balancers are in your opinion better?
I don't want to buy a bms, because I developed one myself on the basis of a Raspberry. It's quite simple, it's checking the pack voltages and the temperatures of each individual pack. If something is wrong with the temperatures or voltages, it will disconnects the whole battery from the rest of the system. 
I can also watch the data live on my smartphone and webbrowser. The cost was about 100€, mainly for the raspi and the power relay. 



(04-15-2019, 11:07 AM)Redpacket Wrote: Maybe look at how much balancing is happening & why - maybe balance the packs capacities & look for any self discharging?

There is no balancing at all. The balancer makes this awfull sound in its normal state.
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#13
There arent that many other balancers out there that only do balancing like above do. Above is one of the better stand alone units.
Most active balancers are complete with BMS functionality in my world.

There are a few others around on Ebay and such but I havent tested them myself.
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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