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Old 06-18-2006, 01:51 AM   #1
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Default Cooling Batts While Charging

Is it efective/wise to cool your batteries while charging them? What are peoples experiences?
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Old 06-18-2006, 02:01 AM   #2
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charges more
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Old 06-18-2006, 03:20 AM   #3
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don't cool them while charging. They perform better when they are warm around 125F. They actually accept less charge when they are cold
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Old 06-18-2006, 04:07 AM   #4
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When I run fans on my IB3800's they take an extra 700 mah or so and perform better. It may also depend on the air temp to how the batteries will act.
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Old 06-18-2006, 04:33 AM   #5
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If by using a fan, you can keep the batts from overheating, then yes, they will help. But if the ambient temperature is relatively cool and the fan keeps the battery from reaching their optimum temperature, you will be losing performance.

Maybe you can try something like charging at a higher rate since you have some extra cooling, just a thought.
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Old 06-18-2006, 06:18 AM   #6
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12v DC fans used in a CPU will work fine. it prevents overheating during charges in the afternoon
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Old 06-18-2006, 07:34 AM   #7
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Cooling batteries while you charge is a really bad thing. They accept more charge when you do, but the reason you are getting more into your cells is that they are being overcharged. Cooling them while charging delays the voltage drop, which is how we all determine when our packs are full....

Apart from anything, the IB cells perform better when warm anyhow, so ditch the fans while charging.

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Old 06-18-2006, 07:59 AM   #8
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Quote:
Originally Posted by ozoner
Cooling batteries while you charge is a really bad thing. They accept more charge when you do, but the reason you are getting more into your cells is that they are being overcharged. Cooling them while charging delays the voltage drop, which is how we all determine when our packs are full....

Apart from anything, the IB cells perform better when warm anyhow, so ditch the fans while charging.

-Scott
True, but if it is hot out, then a fan will help keep the batteries at the temp they should be peaking at. I'm not saying you are wrong however, check this out: http://nexusracing.net/newsdesk_info.php?newsdesk_id=44
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Old 06-18-2006, 09:12 AM   #9
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If it's too hot out, lower your charge rate or lower you delta peak cutoff. Never force cool your cells. During charge OR after a run.
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Old 06-18-2006, 09:17 AM   #10
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its only good to have small fans going if it is reallllly hot out
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Old 06-18-2006, 10:34 AM   #11
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do not use a fan while charging as the air goes around the cell some side or tops of the cell will be charge unequally if its very hot out just lower the charge rate any questions shoot me a e mail at [email protected]
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Old 06-19-2006, 02:19 PM   #12
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What about battery heat sinks....?? How do they help..? Just dissipates the heat quicker I suppose?
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Old 06-19-2006, 03:27 PM   #13
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Quote:
Originally Posted by tbeardmore
What about battery heat sinks....?? How do they help..? Just dissipates the heat quicker I suppose?
They will dissipate the heat more evenly over the pack.
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Old 06-19-2006, 06:35 PM   #14
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Quote:
Originally Posted by FTNTC3
They will dissipate the heat more evenly over the pack.
they also provide even cooling
i think there useless
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Old 06-19-2006, 09:33 PM   #15
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Why not put the cells under the fan after charging if there is harm blowing a fan at the cells during charging??
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