I have a board that has a 10s1p LG setup. I am wanting to add a 10s1p battery pack in Parallel to basically create a (10s2p 4.4Ah setup).
(Note both batteries have separate BMS connection.)
My question is:
If I put these batteries in parallel will I be able to charge them as a single unit? Or do i have to disconnect the series connection and charge them individually?
…Think of a meepo board that has a 10s1p… then purchasing another 10s1p battery setup from them in enclosure. How do i connect them together, and how do i make it so i can charge them together?
you can charge them without bms (without to say i recommend it)
but this way it would work if the packs have close the same voltage like @thisguyhere already said.
If each pack has it’s own BMS and I charge with a Laptop (42v - 2Amp) charger, if they are connected in parallel If i just plug into the charge port of one setup, i assume the other will not charge properly as the BMS is connected to it’s own charge port? Or once in parallel it will charge properly? thx
Sorry if I wasnt clear, still trying to wrap my brain around things. The board originally only has a single (10s1p) with charge port. I would add a secondary 10s in parallel giving me 10s2p. Once the second battery pack is in parallel, could i charge both through the original charge port, or would i need to charge them separately? thx
I second the request for photos, but you should be able to connect the charge port wires and battery output wires in parallel. HOWEVER, you MUST make sure both packs are at the exact same (within 0.1V, or within 0.05V if in the 35-39 range) voltage when you connect them together. This is important. Easiest way is to charge both of them until green light with the same charger, one after the other. Another way is to connect the positives together first, then put an old-style incandescent automotive light bulb between the negative (B-) connections until the voltages are the same.
Sorry, I have no picks for everyone… .but interesting. I could tie the charge port wires together, and then just charge with my 42v/2amp charger. That seems like it could work.
I also totally understand making sure both are same voltage before putting in parallel.
It will, it will just take longer. Many people do this. Even if you search for ebike batteries and power walls they do it. I was watching a video just yesterday of a guy that connected the same batteries as meepo use together in parallel to make a mini power wall to power an inverter. It’s the same concept