Connecting lipos both in parallel and series

[Dunkirk]

I have four 3s 3300mah lipo batteries. I want to make them as a one pack with power of 6s and capacity of 6600mah.

Would this work?

1. Connecting two batteries in parallel making battery pack of 3s 6600mah. x2
2. Connecting these two packs together with series connector making a 6s pack

Is it possible that one battery is drying faster than other?

Thanks!

 

[mark5]

You can connect them as either:
1. parallel first, then in series like top picture, or
2. series first, then in parallel like bottom picture.

 

[Gregory]

Is it possible that one battery is drying faster than other?

Thanks!

Sure, one cell (or battery) will by definition have the lowest capacity.
But cells in parallel will balance out differences, their voltages will try to equalise. The more cells in parallel the more they tend toward the mean. Paralleling the best cell and the worst cell gives you an average cell. Which is one reason why I prefer diagram #1 (it is also easier to check voltages) paralleled at cell level, but both work.

 

[dogman dan]

Yes, but the title makes it sound like a dangerous connection. Two packs parallel and in series is a short circuit.


But 4 packs, you can connect two parallel, making two larger 3s packs. Then the larger packs can connect in series.

Or, you can make two 6s packs, then connect them parallel. Either one will work fine.

Only if one pack is no good will there be any problems.