Can someone tell me if this diagram I made is correct ?

This is a battery pack I want to buildi just want to make sure I'm doing it right. It's 40 packs of lithium cells. Each pack is made of two cells at 2200mah 3.7v in parallel. The "yellow" wires in series is one of the issues. I'm not sure if I can just solder these wires together in series or if I should use short copper pieces to connect them. The four positive and the four negative ends at the beginning and end of each series I will connect with long pieces of copper to make my discharge/charge terminals. Oh I should mention that each cell has its own bms.

That will work.

However, it will be better for balancing your cells if you wire them up parallel first, then wire in series. Right now, you have 4 10s2p packs wired in parallel. the optimum way would be 1 pack of 10s8p. Unless you have a balancer for each of the 10s2p packs, then balancing them all together will be much less hassle, and less likely to have a problem.

Best reply on three platforms! Thx so much !! Would that also change the AH rating from 16 to 8? I'm not too technical when it comes to that

Connecting in parallel keeps voltage constant, accumulates pack Ah capacity. Ah only decreases by removing units.

Series keeps Ah constant, increases voltage.

Fantastic!!!! Thanks alot!! I placed my order for 80 of these pack!

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