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Top Balancing LiFePo4 Cells using a low cost benchtop power supply.

Top Balancing LiFePo4 Cells using a low cost benchtop power supply. 2023-09-03

Its wonderful! I decided to translate this guide into Polish and make it available with the permission of the author
Well done, very thorough, this has helped me tremendously, many thanks
Thanks for the tips ;)
Wow thanks for all the information in one place !
i found these errors in page 2:
"then you are more likely to get BMS High Voltage cut-offs with a 150V delta. However, if the charge voltage is going to run at a conservitve~3.5V/cell"
must be 150mV not 150V
and conservative not conservitve
Please place greater emphasis on the actual need for fabricating improved leads, how crappy the factory ones are, and that they may cause an already long process to be 2-3X as long. Include wording to indicate the following: 1) "Cells may ship as low as 30% charged. If you have 4X 280Ah cells, that's 0.7 * 4 * 280Ah / 10A = 78.4 hours of charging at 10A."; 2) at these low charge currents, cell voltages may barely budge for days at a time. Don't be surprised if you don't see voltage increase for very long periods of time. If you're still showing current on the power supply, and there is no heat or swelling, it's still charging."
Nice, good job
Thank you for compiling sir!
Great tutorial, thank you. This is exactly the way I do it and advise people to do. I wrote a similar tutorial in french and was asked to translate it in English - no need anymore, I just point to yours.
Excellent, this is very -very helpful! I love Will's videos, they're what got me here. In addition, I need this kind of methodical step by step tutorial to really help it sink in. Also, this gives me something that I can easily follow when I get my cells and assemble my battery. Many thanks.
Excellent how to for beginners. You can't go wrong if you follow the directions to the letter.
HOLY CRAP!!! This is AWESOME! I could not have found this at a better time as I am looking for help on doing exactly what you describe here. I am now going to order my variable DC power supply right now. I'll look at the power supply you recommend and compare it to what I am considering.

By the way, I like the Alfred E. Neuman avatar.
... THANKS .... :)
Great information! I will be using this tutorial when top balancing my batteries.
Thank you for taking the time to teach us yet again! This makes sense to me!
Very nice! Only one appreciation, maybe is my fault, but when precharging the cells (wired in series) the first cell with the positive connected to the source is getting 3,65 pretty before the others (the others are at 3,40), when the power source is of, all the cells are at 3,40. I'm doing something wrong?!
No..... You are not doing anything wrong. We know the cells are not ballance and one will hit 'full' first. It just means that cell is further out of balance than the others. It also means that once you put them in parallel, it will take longer for them to get up to 3.65 because the other cells are not as well pre-charged.

Some folks will say that .25 volt difference is too great to put them in parallel.
Personally, I would not worry about it. However, if you are concerned, start top balancing the other cells till they get up to 3.5 or so and then add the last cell in.
very help dude, thanks for going to all that effort for all of us. budding lipo builders
Definitely helpful
Thank you, very well explained.

diy solar

diy solar