New Products Flash Sale
Thread Tools
Old Jul 26, 2015, 11:41 PM
Huerta Jose is offline
Find More Posts by Huerta Jose
H&H SERVICES
Joined Nov 2014
2 Posts
Question
battery gets super hot

i have a naza lite set up on a 550 hex with a 4000 -11.1 3s lipo , after about 8.mins of filght or any batt , thay get hot ass ---t WHY
Huerta Jose is offline Find More Posts by Huerta Jose
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 27, 2015, 12:17 AM
vollrathd is online now
Find More Posts by vollrathd
Registered User
vollrathd's Avatar
Joined Jan 2007
1,620 Posts
Quote:
Originally Posted by Huerta Jose View Post
i have a naza lite set up on a 550 hex with a 4000 -11.1 3s lipo , after about 8.mins of filght or any batt , thay get hot ass ---t WHY
I assume you're indicating the battery is getting hot? Or is it the motor?

Generally if you can hold your fingers on the motor for 15 seconds after a flight without branding your self, the motor is OK. That would be around 130F or so.
vollrathd is online now Find More Posts by vollrathd
Reply With Quote
Old Jul 27, 2015, 02:57 AM
slipstick is offline
Find More Posts by slipstick
Registered User
Staffs, UK
Joined Nov 2003
11,564 Posts
Why is nearly always too much current. So first you need to measure how many amps it is using at full power. If you don't have a wattmeter to do that then it's worth getting one (or at least borrowing one).

If the battery is getting hot it's too much current usually because the battery is too small for the current the motors are trying to draw.

If the motors are getting hot it's too much current usually because the prop is too big for the battery you're using e.g. you have the prop recommended for 3S but you're using a 4S battery.

Steve
slipstick is offline Find More Posts by slipstick
Reply With Quote
Old Jul 27, 2015, 06:16 AM
tacx is offline
Find More Posts by tacx
Registered User
tacx's Avatar
United States, MI, Romeo
Joined Apr 2009
3,045 Posts
A watt meter is your friend.
tacx is offline Find More Posts by tacx
Reply With Quote
Old Jul 27, 2015, 09:18 AM
hoppy is offline
Find More Posts by hoppy
Space Coast USA
hoppy's Avatar
Space Coast
Joined Oct 2000
21,914 Posts
An 8 min flight is only a 7.5C draw on the pack...shouldn't be a problem.

Is it the motors or batteries getting hot?
Can you hold them in your hand for 15 sec?
What motors are you using?
What size/brand prop?
Are these new or bought used batteries?
hoppy is offline Find More Posts by hoppy
Reply With Quote
Old Jul 27, 2015, 02:24 PM
rampman is offline
Find More Posts by rampman
Frankenstein recycled packs
rampman's Avatar
USA, AZ, Gilbert
Joined Jan 2006
9,077 Posts
Not mentioned yet, what is the voltage on each cell when you land?
If you are discharging them too low they will heat up; often in the summer to the point of too hot to hold.

Rick
rampman is offline Find More Posts by rampman
Reply With Quote
Old Jul 27, 2015, 04:36 PM
ggcrandall1 is online now
Find More Posts by ggcrandall1
Registered User
ggcrandall1's Avatar
USA, GA, Marietta
Joined Aug 2005
7,068 Posts
As mentioned above batteries get too hot because you are drawing too much current.
They also get too hot if there is insufficient airflow around the battery.

But what do you consider too hot? Have you measured the temperature? Normal operating limit for a LiPo is about 145 degrees F.

To get the best help you need to provide all the operating parameters.

Glen
ggcrandall1 is online now Find More Posts by ggcrandall1
Reply With Quote
Old Jul 28, 2015, 11:12 AM
kamcoman is online now
Find More Posts by kamcoman
Registered User
Douglasville, GA
Joined Sep 2004
66 Posts
Huerta Jose I noticed you started another thread about this same issue 18 minutes after this one. None of us can help you if you don't answer some of our questions. Keith
kamcoman is online now Find More Posts by kamcoman
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion 2200mah 25C battery getting very hot with low amps draw Harasi Batteries and Chargers 14 Jul 05, 2015 08:24 PM
Discussion Blade 200 QX Batteries Getting Hot goofeyfoot Multirotor Power Systems 3 Apr 11, 2015 06:59 PM
Question SkyZone 5.8GHz 200mW Tx gets super hot WhitePhoenix92 FPV Equipment 2 Oct 13, 2014 11:02 AM
Help! Motor and battery get hot quickly mcostella Off-road Cars 11 Jun 08, 2014 12:17 AM
Discussion HK Multistar ESC's Get Hot Hot Hot! AdMan Multirotor Talk 9 Jun 01, 2014 02:28 PM