Search results

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 ...

Thanks. 1- this is the method I used. big cable + rings. but I gave up the parallel for the load in series and there I still have problems !!! I do not know what to do...

Hello, I get back to you again because I still have issues with my Lifepo4 100ah 4s battery pack. I tried balancing from the top with a laptop power supply coupled to a DC buck all connected in parallel. When my power came to 3.65v my cells were actually only 3.50v. So I stopped and connected...

Like you said I changed the cables and everything is OK now! thank you,

OK, I'm installing bigger wires and keeping you posted.

I didn't quote the right sentence, sorry. No alligator clip, I screwed the lugs directly onto the aluminum strip. For info I set 3.3A with 0.75mm² cables.

I read the answer directly on the forum thread and the author says that ultimately it doesn't matter. I also read that there could be a difference of between the DC power supply and the actual value but in this case what should I do? Take the next step towards the 3.65v target? Thank you for...

I do not understand. Yes unfortunately the cables are thin! But why does my DC power supply mark me 3.50v if in reality the cell pack is at 3.33v ??

Hello, I'm still calling on you! My power has reached its target of 3.50v yet when I test the cells individually they are at 3.33v ... is this normal? thank you,

hello, after several days of rest, connected in parallel, I connected my cells with my home-made power supply. Currently I apply 3.50v to 3.3a (max of my power supply). Thanks for your help. I will come back to give you the result ...

- OK - But is there no risk? It will "float" without ever exceeding the target voltage (sorry, I have no knowledge in this area!) - I speak french

Thank you for the link. I had consulted the method. On the other hand for the video of will, as I do not speak English I did not understand everything !!! So let's imagine that I have more than 66 hours to lose, like will, I connect my power supply to the batteries connected in parallel, I set...

Yes I have a BMS and a 12v charger. As recommended, I wanted to balance before final assembly. Then I will charge with the 12v charger under the control of the BMS!

Hi, I just got 4 lifepo4 100ah cells. The 4 tested at 2.99v. For the moment they are connected in parallel, at rest. I would like to do the first parallel charge at 3.65v as will in his video. But I only have that as material: Can I do it? Thanks

Thank you. I have reviewed the 2 methods from the beginner's guide. I will therefore charge in parallel with rest phases. To do this I have this device at home. Is this okay or do I have to buy a lab DC power supply like Will?

thank you for the answer. so I plug in in parallel and I let it rest, is that it? can I use a small diameter cable to connect?

Hi, That's it! After the third time I received the batteries !!! This time I ordered from Alibaba. These are 100ahs. I will be able to start construction !!! But already a problem ... I think I'm going to run out of space in my ammo box, right ??

Hi,I just got 4 Lifepo4 100ah cells. With the voltmeter I have 2.99v on the 4 cells. Only the thousandth varies on a cell. Can I directly plug in my BMS and charge without going through the balancing phase? thank you, (i'm french and i use google translate, sorry for the language).

Thank you for your answer. In a hurry (after seeing this post) I launched an order. According to the seller the batteries are in stock and will be dispatched on Monday. It should be good...

Hi ghostwriter66, i need to order batteries now and your post worries me! If I understood correctly, by ordering now I risk receiving a poor quality battery? Do sellers on Alibaba not have stock? thank you