Best way?Charging 20s2p with Hyperion EOS 1420i Net3 Charger

[doc007]

Anyone have any experience using this charger Hyperion EOS 1420i NET3 Charger - 1S-14S, 20A max, 550W

(Link to charger: http://www.hyperion-world.com/products/product/hp-eos1420inet3/)

If so, what would you suggest is the best way to set-up my wiring harness to charge my 20s2p pack composed of 10x 4s 5000mAh

(Link to packs: http://www.hobbyking.com/hobbyking/store/__15521__turnigy_5000mah_4s1p_14_8v_20c_hardcase_pack.html)

 

[wesnewell]

Assuming you have the 4s packs paralleled using 2x balance cables, make an adapter balance cable to turn 3 of the 4s plugs into 2 6s plugs like this. Just 2 pics doing the same thing.

You can now charge this 12s section as 12s2p by breaking the ser4ial connection bewteen bricks 3 and 4 of the pack. You can then charge the rest of the pack as 8s2p.
I run 4s packs as 24s2p and split in middle and charge the whole pack as 12s4p using the 4s to 6s balance cables.

 

[999zip999]

Even thu I love my 1420 for it's power and ease of spiltting my 24s pack lifepo4 as two 12s for charging. It is very touchy for getting a reading on the cell voltage and any movement of wires will get a output error. I'm told to update the firmware. But the idea of these is over my head and it works now. Still thinking of buying a second so as to charge the whole pack at once. I use two HP power suppies for 24v 1000watt and was told I could hook both 1420 to the HP power supplies. They like 24v much better than at 12v. But only have so much ebike money.
Wesnell has drawn a great setup for you and has many answers for lipo prolems from experance.
This thread might be better served in the battery section. Maybe a Mod. could move it for you.

 

[dnmun]

or you could use a 20S lipo BMS and bulk charge with a 900W charger to get the 10A charging rate. that would help prevent the inevitable mistakes and damage from unplugging and replugging. plus you would have short circuit protection and over discharge protection from when you leave the controller or DC converter turned on. it will balance the pack also so you can get the maximum capacity from the pack.

the D107 is about $25 and the D166 is about $60.

http://www.bestekpower.com/74v20spcmbmspcbforli-ionli-polymerbatterypack/

 

[doc007]

Assuming you have the 4s packs paralleled using 2x balance cables, make an adapter balance cable to turn 3 of the 4s plugs into 2 6s plugs like this. Just 2 pics doing the same thing.
View attachment 1
You can now charge this 12s section as 12s2p by breaking the ser4ial connection bewteen bricks 3 and 4 of the pack. You can then charge the rest of the pack as 8s2p.
I run 4s packs as 24s2p and split in middle and charge the whole pack as 12s4p using the 4s to 6s balance cables.

Thank you for the diagram!

Anyone know where I can buy converter cables to do this without having to hack stuff up?

 

[wesnewell]

I had to make my own. Since running 2p, I bought 6 2x 4s parallel cables and a lot of 10 6s pigtails for $4 shipped. Cut all the plugs of the 2x 4s cables and wired up 2 sets the same way. Color coded the 4s connectors black, blue, and red so not to screw it up when plugging the batteries in and color coded the 6s plugs black and red. Should probably indicate that on the drawings.

 

[doc007]

ok sounds like I'm going to have to make them too. where did you buy your materials?

 

[wesnewell]

http://www.aliexpress.com/item/F00902-10-6S-26AWG-Lipo-Li-po-battery-balance-charger-plug-cable-Rc-Helicopter-Free-shipping/331167649.html
http://www.hobbyking.com/hobbyking/store/__27078__JST_XH_Parallel_Balance_Lead_4S_250mm_2xJST_XH_.html
http://www.hobbyking.com/hobbyking/store/__27080__JST_XH_Parallel_Balance_Lead_6S_250mm_2xJST_XH_.html

 

[doc007]

Still waiting on the balance leads to make the mods.

In the meantime I got the charger in the server PSU's running https://endless-sphere.com/forums/viewtopic.php?f=6&t=41331&p=766521#p766521

Now the question is:
what I should do when charging my battery pack for the first time? I'm thinking cycle once and charge to 95%. What do you think? Should I cycle it more or dont even bother. I'm not sure how long it would take to cycle on the charger but I figure this would be the safest bet. The packs are brand new but they were bought last year.

Feel free to leave your recommendation in my thread:
https://endless-sphere.com/forums/viewtopic.php?f=6&t=41331&p=766521#p766521

I will update this thread about the balance lead mod once they come in. Thanks again for the idea to charge at 12s2p and 8s2p. Would have never thought to get that fancy. lol

 

[doc007]

You can now charge this 12s section as 12s2p by breaking the ser4ial connection bewteen bricks 3 and 4 of the pack. You can then charge the rest of the pack as 8s2p.
I run 4s packs as 24s2p and split in middle and charge the whole pack as 12s4p using the 4s to 6s balance cables.

I think I'm missing something. How can I charge the rest of the pack at 8s2p?

From what I understand the hyperion 1420i has two 7s balance leads to allow you to do 14s. BUT if each of the two balance ports are limited to 7s, how does one balance 8s? :?

Quote from Hyperion website:

2 x 7S super precise 12bit balancers built in: The latest 12bit balancer circuits are built into the EOS 1420i NET3 and deeply integrated into the operation modes of the charger. These balancers are a vital safety measure that monitors the entire charging process from the time you connect the pack until your order is carried out.

 

[wesnewell]

2 4s packs in series is 8s which will have a low and high 4s balance plug to fit each port of the charger.

 

[doc007]

Still got a lot of learning to do about Lipo charging Not sure how I over looked it. I think you spoiled me with those diagrams. :lol: Its much easier to understand that way.

Thanks for the assistance!!

I guess this is how the 8s2p should be hooked up:

 

[wesnewell]

Well you don't show the 2 adapter balance boards, yes, that looks right.

 

[doc007]

great, thanks! Glad i got it right, somewhat. Fingers crossed for the charging. Looking for a nice steel toolbox to charge these up in. All the lipo fire threads and videos have gotten me nervous.

Im wondering, is there a charging protocol for new packs? Cycle once or twice then charge to 95%? Or just go ahead and charge them up to 95% and go ride?

 

[wesnewell]

I just charge and ride. Never had a problem. Just make sure you test the balance of the new packs before you charge them.