Hi! Not particularly Esk8 based but this seems like the best place to ask. I’m working on a portable single board computer with the intention of being buildable at home by most hobbyists and I’m wondering what would be the best way to replicate the laptop battery format. I figured I’d ask here first to make sure I don’t ruin a couple cells.
If you were to connect 4 cells in series, end to end, could it be charged evenly through a cheap battery charging board such as this provided they’re all the same cell and inserted with the same charge?
if youre trying to replicate how batteries are charged in computers you’d need a bms to control the voltages of all cells in series. youd need four of those things assuming they charge to 4v about. even then im not sure you could run 4 of them at once to a connected battery being fed from your one power source without a short. don’t read Russian though.
Hmm, wouldn’t 4S1P with a single group BMS like I linked be the same as how those generic portable batteries packs work though? I thought you only needed a BMS when it came to keeping multiple parallel groups at the same charge.
The biggest reason you need a BMS is because all cells in series will fluctuate in voltage, because the internal resistance differs and thus the charge/discharge rate differs ever-so-slightly. Even with cells from the same batch.
BMS is for batteries in series. Parallel batteries keep the same charge by themselves just because they are connected. Current will flow between the cells to equalize.