I'm building a 1200W portable stereo system powered by repurposed laptop Li-Ion cells. In order to get a minimum 8 hour play time at maximum volume, as well as provide some external power via an inverter, I've designed a 14S4p battery with appropriate BMS, with the idea to put 3 in parallel to meet my 25A discharge requirements and provide even more capacity. I know this is going to be heavy but I'm not trying to build a toss-in-the-backpack kind of bluetooth speaker here.
A 14s pack charging at 0.5c is going to take well over a day to charge, no good if I want to use the system again tomorrow. I find my self wondering if it is possible/feasible/advisable to do the following:
Build 3s1p packs, each with their own BMS, and place 5 packs in series for a 55.5-63V output (to feed the amp through a 48V converter), and then parallel 12 of these for a 24Ah capacity. At 0.5c each 3s1p pack would charge in ~6 hours, as massive win over the 14s' 28 hours.