This is one of a series of articles, describing my journey of assembling and installing Lithium battery cells, as part of my van conversion. I will likely make mistakes and may not even reach my goal of a cheap, yet large Lithium battery bank.
This is the continuation of Part Two of my journey.
I used a small 12V Lab power supply to top balance the battery cells. I connected all the positives with bus bars and separately, all the negative ones. My LiFePo cells accept a max. of 3.65V and that’s how I set the power supply. Then set the amperage to maximum (<1C) and I let them charge until the charging amps showed <0.1A. Actually I disconnected the power supply a bit early, when the cell terminal voltages rose above 3.65V
Two simple battery boxes will hold four cells each, making a 12V configuration, each with their own 120A charge/discharge BMS. Together they can handle 240A max (240A * 12.8V = 3072W max. output). Charging will probably be limited to 60-80A.Continue reading DIY Lithium Battery – 2b