I am trying to make a battery pack that will power my electronics. I need to make +7V and -7V. The +7V needs to have a decent amount of capacity. I have proposed a 2S6P circuit for the +7V supply with a 1-Ohm STAR resistor network to balance the midpoints. To make the -7V I just tacked a 2S circuit below ground.
To make things complicated each cell has a Battery protection IC BQ2970 to prevent reverse polarity insertion, short circuit protection any many other things. So each cell in the schematic is actually representing Pack+ and Pack- in the second picture
I am designing my PCB to include a charger option. How do I go about charging this? Is there an IC or circuit anyone can recommend?