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Help figuring out what my power source should be for my TEC

post #1 of 7
7/10/12 at 6:21pm
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I just bought a DC 5.9V 6.71W 4A Thermoelectric Cooler Cooling Peltier Module TES104904 to make a can drink cooler. I am trying to make it battery powered and was wondering what the optimal amount and size of rechargeable batteries would be able to power it. I was also wondering about what size heat sink would be best? I have a 15mm x 15mm heat sink currently I was going to use. Lastly, is it ok for the heat sink to be touching the surface or should I have something between the heat sink and the desk.

Appreciate any help!

Thanks.
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post #2 of 7
7/11/12 at 7:18am
If you were looking to do AA Battery power, something like these would only do the job for about a little less than an hour, at about 4.5V.

My problem is that I have no idea how much heat in terms of wattage needs to be pulled from an aluminum can. At 4.5V, the the current draw on the battery will be around 2.5A or so (couldn't find an exact charge for this TEC to use). This would give a delta of about 20°C at 6.7W.

I think you'll have to test to see how hot ~18W will be with the heatsink on. I'd say, just attach it with some thermal paste and see how it fairs. If it's too hot, maybe think of putting a fan blowing on it. It won't get hot instantly. Maybe put yer finger on the cold side to give it a small load.

I have no idea if 6.7W is enough to pull heat from the can. If you can find that out, I'd like to know.
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post #3 of 7
9/7/12 at 12:26am
usb powered a option? would save changing batterys every like 20min depending battery and how much power the tec will pull..

just my thoughts, if not not sure how many batterys/what ones you would need smile.gif
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post #4 of 7
9/7/12 at 3:02pm
Quote:
Originally Posted by Liighthead View Post

usb powered a option? would save changing batterys every like 20min depending battery and how much power the tec will pull..
just my thoughts, if not not sure how many batterys/what ones you would need smile.gif
Don`t think usb port could handle the current draw, possibly a fast charging port such as the one on my Max V gene ROG. I`ll look a little later and see if the manual has any specs on output. thumb.gif
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post #5 of 7
9/7/12 at 4:21pm
Should be 1A max off of 1xUSB3.0 port. To manage that, you would need 3 of them in series to bring the voltage across them down to 1.66V which would draw 1A all together. This would result in 6W of Qmax at 20°C difference for the entire TEC System. For this to even remotely work (you have the can that is > 10W load), you would have to insulate. Would also probably take a long time for it to cool down.
Edited by Krow - 9/7/12 at 4:29pm
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post #6 of 7
9/7/12 at 4:25pm
Quote:
Originally Posted by gdesmo View Post

Don`t think usb port could handle the current draw, possibly a fast charging port such as the one on my Max V gene ROG. I`ll look a little later and see if the manual has any specs on output. thumb.gif

mmm true, maybe a molex connecter at the back of your comp?
a normal AA battery is like 500ma? still half asleep so not sure how many you would need to power that TEC for a hour. 6? or more illd say
also with using a power supply, could put a voltage regulator type thing on it... and warm it up or turn it down a bit if needed...

maybe a old laptop power supply? or something like that, if you wanted a separate unit..

orr if you wanted battery probably wrong but wouldn't you need like 6000ma/hour ?
maybe a rechargeable rc car battery?
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post #7 of 7
9/7/12 at 4:37pm
This would let you squeeze out 2A if it was needed. If you got 2 of those TEC in series, you could run them for about 3.5 - 4Hrs using both USB Ports before it died.
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