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Qnbbm balancer question
#1
Hey guys,
I got 7 qnbbm balancers today and they work, but they make a really loud high frequency sound.

Is that normall?Send them back?

Any suggestion what other system to take? Maybe a complete BMS with balance funxtion?
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#2
Its normal. Check My video about it.

I use batrium.
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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#3
Can you recommend the batrium system?
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#4
I have 5 of Them... Smile
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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#5
The high pitch noise is normal, after several weeks you don't even notice it anymore. 

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#6
(04-13-2019, 04:31 PM)jonyjoe505 Wrote: The high pitch noise is normal, after several weeks you don't even notice it anymore. 


Thats the same with all loud noises..... Big Grin Big Grin  just wait long enough.... (chuckle).

I have followed this
https://secondlifestorage.com/t-Good-Chinese-BMS-review

It is a complete BMS with balancer, cheap ( 30 $), seems to work quite well, as far as i have tested it, works from App and PC, is extremely flexible because you can change nearly just every parameter you want.

But, the App is just terrible in terms of operational surface.....
and the balancing current is quite low. But, for appropriate batteries i guess its enough.
0,8kWp in Test
4 kWh battery target
Ultra low cost
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#7
Maybe its possible to open the balancers and put some insulation inside. Someone tried this?
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#8
(04-15-2019, 06:54 AM)drbacke Wrote: Maybe its possible to open the balancers and put some insulation inside. Someone tried this?

I think they are potted in epoxy.... (if not, then maybe do that?)
Running off solar, DIY & electronics fan :-)
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#9
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.
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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#10
Maybe look at how much balancing is happening & why - maybe balance the packs capacities & look for any self discharging?
Running off solar, DIY & electronics fan :-)
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