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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 07-03-2011, 09:00 PM   #1
xmech2k
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Default Thunder Power TP-610C discharging questions

So I've been using this charger for quite some time. I recently read how you should store your lipos at 50%. I'm about anal about stuff sometimes, and in situations like today, where I fully charged a battery then the wind got way too strong for my taste, so now I'm home started discharging this battery. I tried this like a year ago, and the unit (Not the battery) gets pretty hot, so I quit doing it. That is, until I read the 50% storage thing. So now I do it with a fan blowing on it to keep it cool.

OK, so finally the questions part!

1) I just re-read the discharging section of the instructions, and it said 'we recommend Lipo and A123 discharge mode only for checking the capacity of the packs'. So should I even be using it to do this?

2) It says it is limited to 7W discharge capacity, and 50mA-1A discharge rate. Ummm, what does that mean? I just leave it at .25A discharge rate.

Thanks in advance from an electronic ignoramous!
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Old 07-04-2011, 01:04 AM   #2
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Default

First, the heat shouldnt matter but a fan will be fine if you want. The discharge function will always generate heat. Thats how it works. Units with higher discharge values have internal fans.

Second - be sure your charger will automatically stop at 50%-60% or storage level.

From your comments on the instructions - to use it only to check capacity - Id worry that it will discharge them fully - which I dont recommend.

So, id re-read the instructions to be sure it has an auto-storage discharge function that stops the discharge when the packs get to roughly 3.8-3.85 per cell.

I think I need a signature.
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Old 07-04-2011, 03:14 AM   #3
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Thanks Larry. I do have an option at what voltage to stop at, I set it to 3.85v. I thought the heat was the release of the energy, but the reassurrance is helpful!

As far as the 7W limit, is that as simple as the equation? Battery voltage x discharge amps? So 12.4v x .25A= 3.1W ?
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