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Super Brain 960 Help Please!!! Somebody!

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Super Brain 960 Help Please!!! Somebody!

Old 03-28-2012, 07:21 AM
  #1  
BigPapa1
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Default Super Brain 960 Help Please!!! Somebody!



Okay Here goes - I am getting back into flying myinexspensive HobbyZone planes along with my Duratrax evader stadium truck. They both

use different size cell batteries. The truck uses a long 6 - 7 cell pack (3300mah) and the plane use 6 - 7 cell pack (much smaller) 1000mah.

They are all NiMh.

I plane on buying other batteries, but that is all I have right now. I also have a Super Brain 960 charger. I am not sure what to set it at for each.

Other then telling me to read the directions which I have a million times, does anybody know of a comprehensive chart that could help me?

I know that a 3300mah battery divided by 1000 = 1c @ 3.3 amps. I have read where it says to set my peak detectat 5mv per cell. So I adjust

it to 35mv for a 7 cell battery? Correct? Does it matter how big the battery is? Would I use the same peak detectsetting for a 7 cell plane and a
7 cell rc truck battery? Sometimes my voltage while charging reads up to10.5 vbut my battery is only a 8.4 or 7.2 volt battery

Any help would be great.

Thanks!

Old 03-28-2012, 09:34 AM
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cubaneight
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Default RE: Super Brain 960 Help Please!!! Somebody!

A can of worms you have well and truly opened! NiMh batteries are very intollerant of incorrect charging and are easily damaged even when using expensive chargers. Thankfully, NiMh is being replaced by newer technology just as they themselves replaced Nicads (a far better battery IMHO). A few things that should be of help to you......are the batteries designed for rapid charging or just slow charging? Follow the figures given on the packs. Good packs that can be rapid charged (vented for safety) can be set to a 1C rate as you've stated. The cut off voltage figure is less easy to determin as this will vary if the pack is new/old/cold/hot. 5mV/cell sounds like a good starting point but change the figure if you get false peaks or overheating. Expect the end voltage to be somewhat higher than the nominal figure i.e 6 cell 7.2V may peak at around 9-10V on a fast charge.
The best way to charge NiMh is with a combination of delta cut-off, temperature and an overall safety timer that will terminate the charge after a set time. Even my £15 Lipro multicharger from Ebay will manage that.
As an example then, take the 5 cell 4000mA RX battery in my YT Spitfire..... Fast charge 4A @ 5mV/cell with the cut off timer set to 1.5Hrs. I don't have a temp probe for the charger at the moment but a cut off temp of 50C would be OK. These figures assume a discharged pack at 5V. Don't forget to monitor the total charge capacity that the pack has/is taking up.
For slow charging, 1/10C is the usual figure but on no account allow the battery to cook itself as we could with Nicads- no more than 15Hrs at 1/10C
Old 03-28-2012, 01:23 PM
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Default RE: Super Brain 960 Help Please!!! Somebody!

Your car pack can be set at the max charge rate and 35 mv. Your plane pack can use 1 amp and 30 mv.

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