I am planning to build a small powerwall / battery pack out of LiFePo4 cells in size 32700.
I really like the idea of using PCBs like used for the powerwall from Jehu and others - but they are for size 18650.
Does anyone of you has an idea for pcb cell holders that could be used instead...
your project looks very intersting to me and I have seen on your first picture that you have PCBs for Jehu's powerwall project?
Did you already test this system or are you even planning to use this for your whole setup?
Furthermore may I ask you for the source of your 18650 batteries...
I just want to post a short introduction of myself and some project ideas.
My name is Daniel and I am living in Germany (Lower Saxony).
I have been working on a few smaller projects like a 4s1p 160Ah LiFePO4 battery pack (planned as 12V replacement) for the camper of my parents, a 4s9p...
I did not do any discharge until now as I stopped the charging for security reasons.
I am a bit afraid that a cell might catch fire, so that I wanted to be on the safe side and ask someone here before.
Thank you for your reply.
My idea was that jumping from 3.7V to 4.1V is just because of the starting charge phase with 1.0A and a pre-charged cell.
I was more worried about the voltage drops afterwards.
The contacts are just fine and cell resistance was approx. 300mOhms.
Hi @ all,
I started to harvest some cells out of old laptop batteries to be able to build up a small powerwall.
I will post some more information about that on a separate thread.
But right after the start, I got a cell with a very strange charging curve so that I stopped using this one and...