battery charger temps

[akphill]

I bought a thunder power tp 610C 80watt charger plus a 10 amp power supply last summer and I think that there is something wrong with it ;D
today is the 3rd time I have used it because it seems to me that it gets to hot charging my 6s 5000 mah battery 2.0 charge rate

Let me put it this way you don't want to pick it up and hang onto it very long it's like picking up your cast iron skillet off the stove as a reference ;D

It has no cooling fan in it to help cooling either.

Does any one think that this is a normal for this charger ;D
or do you guys think I need to take it back to the lhs from which it came ? asap

[McKrackin]

80W charger is a bit small to charge 5000mAh packs at 10 amps(2C)

[Solitaire]

Yep, you're trying to do too much with that charger, Phil. You might get a 3A charge, depending on the efficiency of the charger. Likely closer to 2.5-2.8A actual.

Watts/Voltage=Amps

[akphill]

See now this is where you guys are confusing me a little bit ;D

I always thought that 1.0 x 1000 WATS = 1 amp and 2.0 x1000 WATS= 2 amps or am i all wrong on this ;D

Which I feel should be in this chargers capability's ;D

Which should make this charger capable to charge at 5.0 or 5 amps charge but I wouldn't dare to do this as is the temp thing going on ;D

[Solitaire]

Not sure what your equations mean, Phil. Can't figger what 1.0 and 2.0 refers to, unless that's a "C" value, but that's battery specific and has nothing to do with your charger output capabilities.

From the equation I posted above...80watts/25.2volts=3.17amps

80watts is the absolute maximum your charger will put out. 25.2volts is the desired full charge for a 6S LiPo. Now, if you were charging a 3S LiPo, you could theoretically get 6.34amps charging. (80/12.6)

No charger is 100% efficient (most don't have the quality components to maintain 90%), so these charging rates will be proportionally less.

[akphill]

I don't think I am explaining myself clear enough on my explanations
Looking in the window of any charger that has a display it asks you how many cells what voltage lets you choose how many amps you want to charge the battery at ( for example esky bat 3s 1800 mah battery you can charge that at 1.8 amps charge rate )
or a 3s 2200 at 2.2 charge rate ) all day long

Now when I charge my 6s 3000 or 6s 5000 at 2.0 the charger gets really hot
Now keep in mind that that charge rate is 0.02 more than the esky battery charge rate and .2 less than the other battery does this help describe my dilemma

[Solitaire]

Sorry, Phil, I'm following now. I missed the part where you were charging at 2amps in your first post.

I think it's how well the charger can transform the input voltage (usually 12v on mainstream power supplies) to the required LiPo voltage. Obviously a charger has to work a lot harder transforming 12v to 25.2v (6S) than it would to 12.6v (3S) I'm presuming it's in the varying quality and construction of the charger components, but that's only an educated guess.

I know Kent had heat issues with his first charger when he went to 6S LiPo's. The solution, I suppose, would be a more capable charger and a higher output power supply.

[McKrackin]

My charger is a 200W and 2 amps on big 6S packs is a bit of a strain.
That's with a 270W power supply.

On a 500W supply,I was getting 5.2 amps but it kicked out on anything above that.

[akphill]

I sent a question to thunder power about the temperature and this is the reply
seems a bigger power supply is all I should need ??
for it to run the same temps ;D


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RE: thunder power charger
Monday, December 20, 2010 2:24 PM
From:
"Jim Skinner Jr" <[e-mail]>
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Hello Phil,



Yes the 610C will get hot when charging 6S, especially with only a 10A power supply. It is normal for the charger to reach 140* F. Going to a bigger power supply will help a little and so will charging at lower amp rates will help. Because there is no fan we use the case as a heat sink to dissipate heat.



Regards,



Jim Skinner

Product Service/Development Mngr

Thunder Power RC

4720 W University Ave

Las Vegas, NV 89103 USA

P/ 702.228.8883

F/ 702.228.8885

[e-mail]