Recent content by benja.min47

Hi, I want to build a 24v battery bank for my trolling motor. I can't seem to make the right decision. I would need your advice! I have already ordered 8 lifepo4 161ah cells (on the way). As I have already made lifepo4 packs, I have at my disposal: - 2 BMS Daly 4s 80A - 1 charger 12v - 2...

I will move on to ability tests soon but first I balance up. There is another thing that worries me, a poorly done weld. there is a risk of leakage?

Hello, you are absolutely right, this makes a lot of sense. So these batteries have a very good 0.40m ohm IR on average.

Hello, I received my lifepo4 liitokala 105Ah yesterday and I am doing the 1st tests. For the occasion, I bought a YAOREA YR1035 +. On the other hand when I take the measurements there is a big difference when I take at the top of the thread or at the base of the stud (see photo). I get 0.82m at...

hello, what did you provide as evidence?

Hi, I don't know which tool the seller used to measure but here is the datasheet. How many Ah do you think the cell can provide?

Okay. thank you. the fact that they have remained 3 years without load does not pose a problem then?

I am sorry i am french and i use a translator. You are right, the exact term is not used. The seller says the voltage is at 3.23v and the internal resistance at 86 miliOhm.

The cells are new (they have never been fitted). On the other hand, they remained stored for 3 years without charge. Is this a problem for this technology?

Hello, I found a person in my country who sells CALB 40Ah (lifepo4) cells, following the abandonment of his project. The cells are new but they are 3 years old and have never been recharged. Do you think there is a risk in buying these cells? thank you, Ben

Okay. Even if there's nothing plugged into it? In this case it becomes very difficult to balance them !! ?? When I think that when I received them they had 0.01v difference ... I should have connected in series !!! At what voltage can we estimate that it is normal 3.55v? Thank you all for the...

Hi, I do not know what to do. When the charge is finished the cells are at 3.65v and a few hours later the voltage drops back to 3.56v !!! I do not understand. Is the problem with the cells or the charger?

Only the first 2, I move slowly!

this is what my Buck cc displays.

I will try to load the cells one by one. I haven't tried this method yet ...