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Old 08-26-2007, 08:49 PM   #1
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Default Trinity DPD discharger

I was wondering if anyone has used the trinity DPD discharger? I just bought one, but seems to take a very long time to discharge my packs. I start each cell with about 1.25v in them and have a cut off at .9v. But it will take about 45 min to complete. Is this normal?????
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Old 08-26-2007, 09:11 PM   #2
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Yep, it's normal. DPD stands for Dyna Pulse discharge. In other words it doesn't discharge at a constant 30amps. It discharges in 30A blocks followed by a cooling down period.

There is a full explanation an the last page of the manual.

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Old 08-26-2007, 09:32 PM   #3
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Great product. I have seen my IR go down, my runtime improve. In my opinion it is an expensive bit of kit but well worth the money.
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Old 08-26-2007, 10:22 PM   #4
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thanks guys for your help, but I understand the "pulse" discharge. But I am using the 5a linear discharge, and it takes 45-60 mins. Thanks,
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Old 08-26-2007, 10:29 PM   #5
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That's about right.
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Old 08-26-2007, 10:39 PM   #6
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Really, at 5amps, going from 1.30v to .9v 50+ min. Anybody want to buy this thing from me
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Old 08-26-2007, 10:53 PM   #7
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once *A* single cell hits the cut-off that you designate, the whole pack will be discharged at a trickle rate.

but at 50 mins, that's usual. i guess it's a 4200 pack? fully charged?
how fast were u expecting it to discharge?
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Old 08-26-2007, 10:53 PM   #8
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Discharge at a higher rate and then put your pack on the DPD. It's not meant to discharge a full pack.

And it takes 1amp 1 hour to charge/discharge 1 amp. So trying to discharge a charged 4200 at a 5 amp rate will take just under an hour. Anything you get will be the same. If you want it to discharge quicker, use the 30 amp. But that will only do 30amp until the first cell hit's the cut off voltage and then it goes to 5amp.

Up to you but this is one of the better tray's out on the market. And I don't typically like Trininty.
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Old 08-26-2007, 11:19 PM   #9
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this is what I do; before I race I will put the pack on my indi 30, which discharge my pack to about 7.4v for the pack. Then I would put on my Novak tray (which discharges at 2.7a) until all the lights would go out, then charge the pack for my race. I want to use the DPD, so I can see what each cell is doing or the condition of each cell. So I use my indi 30, then I tried the DPD (at 5a linear), which takes 50+ min.

My novak tray only takes about 10 min for all the lights go out. My brother uses a Much More tray, which discharges a 5a linear, but only takes about 5-7 min.

This is why I don't understand why it is taking so long the DPD to discharge.
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