[frodus]

It will balance, but its going to take a while because you installed unbalanced cells in a pack.

ALWAYS equalize before you install.

What I would do?
Get a single cell charger and individually charge them.


oh, and BTW, thats normal. The boards heat up, they reach HLim and the BMS cuts the charger off, rests, then when the cell settles below its HLim, it will start charging again.

 

[frodus]

just disconnect the pack from the main charger (the series charger) and you can individually charge each cell without taking anything apart. If you're using two chargers, just make sure they're isolated (switching) chargers (both of those apear to be).

Get the 6A version, it'l speed things up a bit if you ever have to use them again.

 

[frodus]

It should be fine unless the chargers aren't isolated. Most are, so you should be fine. Better to ask now.

 

[frodus]

Why not just parallell them for a while? Voltage should be equal on all cells then. Notice that you MUST disconnect the series connection first!

Well for one its a PITA since he's already installed the pack.....

its much easier to put a single cell charger on each one for a little while and do it that way.



As far as isolated chargers, you really only need one if you're using multiple chargers at the same time.

 

[frodus]

because switching chargers are isolated by their design.

There is no connection between AC and DC, its all isolated by transformers. The problem with non-isolated supplies, is when you connect two to the AC side, and then try to connect them to two different batteries in a series string, it causes a short because they share a negative connection.

If you're only using one charger its just fine.