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Lipo getting warm... cause for concern?

Lipo getting warm... cause for concern?

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Old 05-27-2013, 10:55 AM
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Default Lipo getting warm... cause for concern?

I'm running an IP4400 shorty in my car to save weight. Although it never seems stressed in 17.5 Blinky, in 13.5 Boosted it gets warm to the touch. None of my full-size Lipos have done this.

So my question is - are others experiencing warm Lipos, and is it slowing me down?
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Old 05-27-2013, 11:05 AM
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Originally Posted by sosidge View Post
I'm running an IP4400 shorty in my car to save weight. Although it never seems stressed in 17.5 Blinky, in 13.5 Boosted it gets warm to the touch. None of my full-size Lipos have done this.

So my question is - are others experiencing warm Lipos, and is it slowing me down?
I have a CRC 1s shorty that would get warm even on 17.5 blinky, right from when it was new. None of my normal-sized cells did.

Yes, it is slowing you down. Is it slowing you down enough to make a difference? Perhaps. Answering that would require some measurements under load.
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Old 05-27-2013, 11:30 AM
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Last edited by djiewie; 05-27-2013 at 11:32 AM. Reason: wrong answer
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Old 05-27-2013, 11:46 AM
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How warm are we talking?
Whats the ambient temperature?

Mine get warm to the touch in 13.5 boosted, I can easily tell which one I used, but it's still only reaching around room temp, 25degC or so
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Old 05-27-2013, 11:49 AM
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I don't let my lipos get past the 80ish degrees, like if I hit it with the temp gun!!
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Old 05-27-2013, 11:52 AM
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Warm to the touch, not hot. Certainly warmer than ambient, really just warm enough that you can tell it's been working, normal in the nimh era but not something i have experienced in the lipo era until now.
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Old 05-27-2013, 03:07 PM
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I don't know how it works but I've heard of people warming their batteries while at races and also heard some races checking battery temps in tech
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Old 05-27-2013, 03:39 PM
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Originally Posted by sosidge View Post
Warm to the touch, not hot. Certainly warmer than ambient, really just warm enough that you can tell it's been working, normal in the nimh era but not something i have experienced in the lipo era until now.
Sounds like they're fine. Just being worked a bit harder
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Old 05-27-2013, 04:50 PM
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I have an IP that just did that when it reached around 6.4v.IR went up too.
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Old 05-27-2013, 07:01 PM
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My 1s and 2s packs got warm under heavy load like mod touring car, mod 1/12 scale, batteries were warm to the touch, none ever complained.

For extra performance some racers warm their packs, not hot but to 90-100 degrees for the extra energy that gives the internal reaction. I could explain but that's a long hard college course.
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Old 05-28-2013, 12:38 AM
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I get about 110f average. 13.5 blinky. never have any problems.
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