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Parallel Charging the batteries safely?


#1

Hey guys
I’m building my first eboard and I came across a problem, I’m going to use 8 Multistar High Capacity 4S 5200mAh (http://www.hobbyking.com/hobbyking/store/_65268__Multistar_High_Capacity_4S_5200mAh_Multi_Rotor_Lipo_Pack_EU_Warehouse.html) and I want to charge them in parallel.
My question is, since I’m charging them in parallel the batteries would have combined 615,680W and the charger that a want to use as a limit off 100W (http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=80422), would it be save to charge the batteries in parallel with this charger? Or would I nedd to use another charger with a higher Watts capacity?


#2

The watt hours of the battery doesn’t matter. You could charge them in parallel. You will just be charging slowly at 100 watts


#3

That’s great :smile:
Thanks for the information!


#4

Perfectly safe to charge in parallel. I prefer it. You need a higher quality charger. I’d recommend the iCharger 208B + 350W HK Power Supply. Otherwise, charging in parallel will take way too long.


#5

That’s a good tip but it’s a bit pricey for me in the moment since I’m already spending a lot of money in the batteries and other components, but will consider getting a better AC charger since they are cheaper and don’t need a power supply, but in the future I will buy one of those with dual charging capability since I wan’t to upgrade my board to an 10S and that way I can charge all the batteries at the same time


#6

IMO Don’t get dual charging it’s pointless if your only trying to charge in parallel. Purchase the iCharger 208B $120 and a 350W HK Power Supply $40. We’ll worth it.


#7

What if i got one with the capability to charge 4 at once and charge 4 4S batteries in two of then and 4 6S in the other, so I would be charging 16 batteries in total, would that be worth the money spend?


#8

If you want to charge about 16 batteries you will need a high amperage power supply + charger otherwise you will need days to charge!


#9

Will 1000 plus W be enough to charge it quickly?


#10

W = U * I
W / U = I

W = 1000
U = (6S batteries) 22,2V
I = X

1000 / 22,2 = 45A

If you are charging 10 6S batteries in parallel you get (45A / 10 = ) 4,5A per battery and will charge a 5Ah pack in about 1 hour.

So yes, charger with 1000W would be good for so many batteries. But i dont think you will find a good AD/DC charger with so much wattage. I think you have to buy a power supply and a dc charger.

Maybe i can offer you my 1080W power supply for a cheap price. My one is with EU PLUG!


#11

Typically, a parallel charging board only allows for 6 batteries at a time.

To charge 16 batteries at a time, you’ll need to make a custom connector.


#12

What is when You plug a parallel board in a parallel board? Should work?!


#13

I’may working on building my batteries in a modular case, so the conectores use to connect the batteries in parallel can be use to charge them also rigth?


#14

It sounds right but it would be better if you can draw a schematic or wiring. Then the people can approve or not approve your idea :wink: