Turn 48v battery into 36v after removing bad cells

[pilotg2]

Hi, I have a 48v 13s5p battery pack. It had 3 bad banks which I've removed. I'm left with what is shown in the pics with all banks around 3.6v.

I'd like to make 3 12v batteries which I'll run in series.

To charge them I have 2 iMax B6 hobby chargers so I'm thinking of wiring up balance leads to each of the 3 packs and charging them separately depending on if I need 24 or 36v. I would like to be able to charge then at the same time too if needed.

The problem is I've never done any of this before.

I'm currently watching videos on how to do this but I've yet to find a similar/exact setup explained in detail.

I guess my biggest hurdles are how to wire in the balance leads for each pack.
Also I understand 10s makes 42v for what is called a 36v battery pack. I currently have 3 separate packs and 1 row of cells. How could I link and balance charge them?

Any help greatly appreciated.

 

[docw009]

You could make a 10S5P 36V pack which will be 42V at full charge. Use a 10S BMS wired conventionally, and charge it with an inexpensive 2-3A charger. I know nothing of hobby chargers.

Three 12,6V packs in series is only 37.8V full charge, same as a half depleted 10S pack. I think that will feel weak on your ebike. If you're using them for something else with no BMS, the application better have an LVC circuit like an ebike, which will shut off before it runs the battery too low,