Active ballancer IC for Li-ion

Thread Starter


Joined Aug 13, 2022
Currently, I'm using the BQ76940 for my BMS 30S but it isn't enough efficiency so now I'm looking for an active balancing solution.
What I want:
  1. Digital interface
  2. Cheap))
In the worst case, I will use BQ76940 + active balancer IC for every cell.

Could you recommend me some IC?


Joined Jan 23, 2014
I bookmarked this a while back; cost was about $3 per bank.
No smarts, though.

There's this DIY BMS, but doesn't have active balancing as far as I can tell:
Maybe it's not too hard to adapt to active balancing?

My hands-on experience with active balancing is limited to buying (but not yet using) a board marked "Active Battery Cell Balancing" JW-5C1.2A. (5C for up to 5 cells (banks), 1.2A for 1.2 amps balancing current.) Like this one:
which reveals that the chip is an ETA3000
Data sheet here:
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