Large capacity cell charger

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fungus

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Jul 29, 2021
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Hi. Is there any recommendations on a modular scaleable Li ion cell charger? Like it can charge a lot of cells and ideally be able to add to the system to charge more cells?

Or a li cell charger that can handle cells more than 10Ah? Ideally in the 100Ah range.

Thank you.
 

hbpowerwall

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Korishan

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charger that can handle cells more than 10Ah? Ideally in the 100Ah range.
Pretty much all chargers can handle this. The difference is the amount of time it takes to do it. "Ah" is a measure of capacity, not flow. A 50 gallon barrel is capacity. But depending on whether you use a 1 pint cup to fill it, a house water hose, or a fire hose to fill it, will change the time it takes to fill it.
If the barrel has holes in it (in comparison to self-discharging cells), then you'll need a charger that can dump in faster, than what leaks out. Or just fix the holes.

And is this charger for your 1s configuration or for a longer string?? That makes the difference on which chargers are recommended, as well. HBPowerwall suggested a 10s charger. But this won't dump 40A into a single 1s string.
 

B8rez 2g4

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Jun 21, 2021
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36
My 120AH battery pack charges fully overnight.

I did that by breaking them into 4 modular packs for convenience and connect them in parallel when in use.

I use 4 hobby RC chargers that I bought used which costs less than a more expensive single charger new.
 

FarmerJ

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Apr 13, 2021
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So if you have a 10S 40A charger and a 10S 100Ah battery, would it take about 25hrs to charge? My thinking is 40A/10s = 4A per cell per hour is the charge rate? I have been considering different ways to charge my 10S 36V golf cart pack that I am building once it is swapped out. I wasn't sure if the original "float" charger for the lead acid would be ok to use and allow the BMS to control things or if I should go to an adjustable power supply that can provide 42v CVCC. I was also considering using a 12v 50A 600W power supply that I have with a variable buck/boost converter to step the voltage up to 42v which would be around 14A but I haven't tested any of this year to figure out if that would work. I was just going on the V*A=W principal. It seems like going with a 48V power supply/charger and stepping down the voltage to what I need would be better than increasing it from what I have read.
 
Last edited:

floydR

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Aug 23, 2017
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1,330
No, in theory charge it would in 2.5 hours. 100/40= 2.5 you aren't charging individual cells,you are charging the Battery as a whole.
Later floyd
 
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