The battery builders club

[deucesdown]

The ones I’m talking about:

10.62US $ 31% OFF|Free Balance|smart Battery Equalizer 1a-10a Bluetooth For...

Options for 1A, 2A, 5A, 10A ($$$$), and a breakout board.

This youtuber has made pretty good videos showing how these work

Bobby's Solar Homestead

There are more basic on-board pcbs others have tried:

Active balancing boards

I just found this https://s.click.aliexpress.com/e/UWolwyK According to the specs this board start to balance the cells as soon as they get out of balance. So even if your board is not on the charger it will always be balancing. What’s your thoughts about it? Calling the bms master @b264 as well, your opinion is highly appreciated

Testing active balancer - results

Ordered one of these through ebay, got it in a couple weeks ago: [image] It’s an active balancer, started talking about them here: Put it through some cycles and wanted to share my findings. A bunch of numbers: [Untitled] Tested on a 12s pack that was being fixed. Manually drained cells 5, 6, and 11 down to a voltage where bms balanding would NOT work (bms won’t go into balance charge if delta is ±0.075v or so). Starting voltages, out of balance cells in RED Drained pack down, varia…