Battery problems and LiFePO4

Author	Message
Revlac Guru Joined: 31/12/2016 Location: Australia Posts: 1282	Posted: 02:39am 18 Dec 2023       Good Bit of reading, I got all lost in it a few times, but will have ago.   Quote   I started testing the worst battery when it suddenly failed. The Terminal voltage was  correct, but it would not take a load nor a charge.  I decided to take that one back to the supplier and see what they thought, with a view to possible get a pro rata warranty as it had been connected to a faulty Active balancer port supplied with the batteries.   I will post some findings and photos in my own thread because I had the very same thing happen with some cells bought from Ali...will not do that again.   Quote   if LiFePO4 is held at anything much above 50% for an extend time. I wondered if that might have been the cause. I wouldn't look to deep into that.   Quote   I grabbed a 16S 200A BMS and an Active equalizer, I took 16 cells from one bank (4) batteries and managed to get all cell sense and balance leads correct first go for 54V out. I have not top balanced each cell yet. I decided to charge the 54v battery at 25A and slow the rate of charge if the Delta was more than 300mv, and just let the active balancer do its thing for now. Yes that should be fine, I did mine that way, they were a little out of balance and with the Daly 16S 200A 30Ma ballancer it tooks weeks, then I pushed the bulk charge to 56v and its been good ever since. I don't think there is a lot of difference between the Daly and the DELGREEN last time I looked, lately I have been looking at getting A JK with 2amp active balancer.