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Cheap Chinese Active Balancers
#1
I have noticed that AliExpress have recently started offering "Active Balancers".

Knowing that these JUST balance and are not a complete BMS, has anyone had any experience with these?

https://www.aliexpress.com/item/33002903687.html

http://s.click.aliexpress.com/e/liImWxvQ

There are apparently 2 types being offered. The second type appears to use capacitors to transfer charge from cell to cell, but not sure about the first type.

Dave
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#2
The first one has been reviewed by Julian Ilett:

https://www.youtube.com/watch?v=IX5wqOs9dXU
https://www.youtube.com/watch?v=Fb52fVaMeY8

There's someone else who's done it too, but I can't remember who did.
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#3
There's a few threads on active balancers. Haven't really wanted to tinker with those cheap under $20 units. But have looked at some more capable units.

QNBBM, expensive when scaled up since they're 20 each. So for a 14S it would be $280.
http://s.click.aliexpress.com/e/qE1RISfO

No name 1A balancer. Not configurable, but balances to 40mV. I use these currently on my 7S300P build. Since they have a serial output that I use to log the data in my build. Under $100 for a 14S setup. If you look at my build I did some small test on it. I'm actually more interested in the one below that I'm waiting to arrive any day.
https://www.aliexpress.com/item/4000061285529.html

Another 1A active balancer. This is highly configurable, and bluetooth output. Just bought one of these to test. Under $100 for a 14S setup.
https://www.aliexpress.com/item/32985346022.html
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