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mV Delta Peak Settings On Chargers?

mV Delta Peak Settings On Chargers?

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Old 10-03-2006, 05:33 AM
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mV Delta Peak Settings On Chargers?

I understand that the delta peak setting varies the point at which cells can peak, but what is the diference between the mV setting's and their effects.

I currently use 3.5mV @ 6-7A with temps of 43 deg C.

I mainly lowered the delta from my chargers default as the cells semed to be peaking hotter than on my previous charger.

How hot can I go, if I raise the delta peak what will it's effects be, i.e. hotter, more punch, lower internal resistance etc?

Thanks
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Old 10-03-2006, 05:48 AM
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right delta peak = not over charge the cell
From PROTRAK web site ,they said,peak at 1.52V per cell is reasonable for charging.Full charge with no over charge. = 9.12V per pack[6cell] .So you can adjust your mV for that the pack peak nearest 9.12V.
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Old 10-03-2006, 05:53 AM
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Originally Posted by khunballz
right delta peak = not over charge the cell
From PROTRAK web site ,they said,peak at 1.52V per cell is reasonable for charging.Full charge with no over charge. = 9.12V per pack[6cell] .So you can adjust your mV for that the pack peak nearest 9.12V.
Interesting, I didn't check the voltage per cell etc when charging (this is the first charger where I can adjust the delta peak).

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Old 10-03-2006, 06:07 AM
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You can try .From my test data[orion advantage charger] if the pack peak over 9.30V,the pack had more V and more IR.but if the pack does not peak over 9.20V ,the pack has the same V but lower IR.
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Old 10-03-2006, 07:26 AM
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With the latest 4200WC cells, I charge at 6-6.5A with 15mv detect on my Pulsar2. Peak voltage is just over 9v and 4500mah.
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Old 10-03-2006, 08:16 AM
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According to our tests, overcharging cells will have higher initial punch (due to high peak volt and more active inside the cells). However, the power curve will drop more steep during the 5 mins race. Actually, in average, the overall power will not be better.

At air temperature of 27-28C, the finish charging temperature on SHV cells are around 52C while World Champion cells are around 50-52C. (The temperature readings are from temperature gun and not from the detector of chargers).

Therefore we use it as a base to setup our chargers. We mostly use GFX and MuchMore CTX.

GFX - Peak Detect - 0.01v
MuchMore CTX - 03mv

Due to different sensitivity of the chargers, you should use this finished charging temperature to setup your charger. If the lowest peak detect has been set but finished temperature is still too high, it's time to budget for a newer and better charger.

The setting should based on new built packs. Old packs will have high internal resistance that will have high finished temperature in return.
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Old 10-03-2006, 09:03 AM
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On the Orion Advantage Charger, I use 5mv peak detection at 6 amps and and usually get peak voltage of 9.11 volts and tempreture ideally at 50c. The final temp though really depends on outside temp at the time. On cooler days my battery temp at peak detection is anywhere form 43c to 48c. I am charging 3800 IB's
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Old 10-03-2006, 11:10 AM
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Originally Posted by Team-Powers
According to our tests, overcharging cells will have higher initial punch (due to high peak volt and more active inside the cells). However, the power curve will drop more steep during the 5 mins race. Actually, in average, the overall power will not be better.

At air temperature of 27-28C, the finish charging temperature on SHV cells are around 52C while World Champion cells are around 50-52C. (The temperature readings are from temperature gun and not from the detector of chargers).

Therefore we use it as a base to setup our chargers. We mostly use GFX and MuchMore CTX.

GFX - Peak Detect - 0.01v
MuchMore CTX - 03mv

Due to different sensitivity of the chargers, you should use this finished charging temperature to setup your charger. If the lowest peak detect has been set but finished temperature is still too high, it's time to budget for a newer and better charger.

The setting should based on new built packs. Old packs will have high internal resistance that will have high finished temperature in return.
So I should really aim for my packs to peak at around 50C and around 9.1V?

Is that 50C as soon as they peak? as the cells temp continue to rise for a while after peaking?

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Old 10-03-2006, 05:24 PM
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What about the Reedy Quasar pro for 4 cell packs? It has a very confusing setup.
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Old 10-03-2006, 06:32 PM
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Originally Posted by KarpetRacer93
What about the Reedy Quasar pro for 4 cell packs? It has a very confusing setup.
On the Quasar Pro you set the peak per cell, and it multiplies that times the number of cells selected. Start low (5mv) and see where that gets you. Too low it will either undercharge or false peak and really undercharge. Too high and you will excessively heat the pack. Can't be good if taken too far. Check the temperature of the pack after you have finished charging and adjust from there. The manual's suggested setting is 5mv/cell for NIMH. Temperature of the pack, at least on my IB3800's really depends on the discharge method. I discharge the pack at 20 amps (that's the most the Quasar Pro allows) then equalize to 0.9v/cell with a Novak smarttray. If I don't equalize, I don't get the same charge or as high a temperature. So it looks from my limited experience, like how you prepare your cells for charging will affect how warm they get.
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Old 10-03-2006, 08:12 PM
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Originally Posted by Skiddins
So I should really aim for my packs to peak at around 50C and around 9.1V?

Is that 50C as soon as they peak? as the cells temp continue to rise for a while after peaking?

Skiddins
The temperature should be taken as soon as they peak. You are right, the cells temp will rise for a while after finished charging.
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Old 10-03-2006, 09:46 PM
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Set the delta peak on your charger at 30-32 mv.
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Old 10-04-2006, 02:52 PM
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Originally Posted by Iceracer
On the Quasar Pro you set the peak per cell, and it multiplies that times the number of cells selected. Start low (5mv) and see where that gets you. Too low it will either undercharge or false peak and really undercharge. Too high and you will excessively heat the pack. Can't be good if taken too far. Check the temperature of the pack after you have finished charging and adjust from there. The manual's suggested setting is 5mv/cell for NIMH. Temperature of the pack, at least on my IB3800's really depends on the discharge method. I discharge the pack at 20 amps (that's the most the Quasar Pro allows) then equalize to 0.9v/cell with a Novak smarttray. If I don't equalize, I don't get the same charge or as high a temperature. So it looks from my limited experience, like how you prepare your cells for charging will affect how warm they get.
Thank you!
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