Go Back  R/C Tech Forums > General Forums > Radio and Electronics
Starter box Lipo gets hot quick! >

Starter box Lipo gets hot quick!

Starter box Lipo gets hot quick!

Old 07-11-2012, 06:05 PM
  #1  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default Starter box Lipo gets hot quick!

I have a Losi 2200mah 14.8v starter box lipo. The battery voltage reading when checking with my voltage checker its 15.1v, the lipo gets hot when running the starter box for a very short amount of time. This is at 15.1v, checking after it gets hot.

Starter box is an Ofna blue truggy starter.

Is this normal?
chopper82p is offline  
Old 07-11-2012, 07:07 PM
  #2  
Tech Lord
iTrader: (8)
 
Integra's Avatar
 
Join Date: Dec 2006
Posts: 12,486
Trader Rating: 8 (100%+)
Default

Originally Posted by chopper82p View Post
I have a Losi 2200mah 14.8v starter box lipo. The battery voltage reading when checking with my voltage checker its 15.1v, the lipo gets hot when running the starter box for a very short amount of time. This is at 15.1v, checking after it gets hot.

Starter box is an Ofna blue truggy starter.

Is this normal?


Is the pack fully charged ?
Integra is offline  
Old 07-11-2012, 08:06 PM
  #3  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default

Originally Posted by Integra View Post
Is the pack fully charged ?
Yes, as stated, voltage was 15.1v, the lipo is a 4s 14.8v.
chopper82p is offline  
Old 07-11-2012, 08:51 PM
  #4  
Tech Master
iTrader: (3)
 
Join Date: May 2010
Location: Chi-Town West Burbs
Posts: 1,727
Trader Rating: 3 (100%+)
Default

What is the C rating on the battery. A starter box pulls a ton of amps, and you need a battery, with a high rating, that can handle it.
mooby64 is offline  
Old 07-11-2012, 09:07 PM
  #5  
Tech Fanatic
iTrader: (10)
 
TX_Punisher's Avatar
 
Join Date: Feb 2011
Location: Republic of Texas
Posts: 810
Trader Rating: 10 (100%+)
Default

If it's a 4s, full charge voltage should be closer to 16.8v.
TX_Punisher is offline  
Old 07-11-2012, 09:17 PM
  #6  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default

Originally Posted by mooby64 View Post
What is the C rating on the battery. A starter box pulls a ton of amps, and you need a battery, with a high rating, that can handle it.
20c I believe, it is the Losi starter box battery, made for starter boxes.
chopper82p is offline  
Old 07-11-2012, 09:21 PM
  #7  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default

Originally Posted by TX_Punisher View Post
If it's a 4s, full charge voltage should be closer to 16.8v.
Yes it was at 16.7v at first, but after a few starts on the box, it was down to 15.1v, this is checking it right after I felt how how it was.

Being that the actual battery is 14.8v, I figured 15.1v would be characterized as fully charged, still I don't see why it should be heating up during use at that voltage.
chopper82p is offline  
Old 07-12-2012, 02:46 AM
  #8  
dtr
Tech Master
 
dtr's Avatar
 
Join Date: May 2011
Location: budapest, hungary
Posts: 1,664
Default

If it drains so quickly and gets hot it is possibly dying. Can your charger measure internal resistance? Also does the motor in the starter get really hot as well?
dtr is offline  
Old 07-12-2012, 05:11 AM
  #9  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default

Originally Posted by dtr View Post
If it drains so quickly and gets hot it is possibly dying. Can your charger measure internal resistance? Also does the motor in the starter get really hot as well?
Yes, the motors do get hot quickly and I noticed that it drained quite quick as well. Also, feeling the battery now, it was a little bit puffed, just a little, when it was hot, not anymore though.

No, my charger can't measure internal resistance.
chopper82p is offline  
Old 07-12-2012, 08:01 AM
  #10  
Tech Lord
iTrader: (8)
 
Integra's Avatar
 
Join Date: Dec 2006
Posts: 12,486
Trader Rating: 8 (100%+)
Default

Originally Posted by chopper82p View Post
Yes it was at 16.7v at first, but after a few starts on the box, it was down to 15.1v, this is checking it right after I felt how how it was.

Being that the actual battery is 14.8v, I figured 15.1v would be characterized as fully charged, still I don't see why it should be heating up during use at that voltage.


If your Pack is Dumping down to 15.1 after only a few starts and not recouping itself withing a few seconds, I would venture to say either the battery is shot or there's some Serious resistance going on in the box.

Ill assume you still have the Stock Tamiya Connector's in the box ? If so Cut those out in favor of Hard wiring. Those Tamiya connector's are like the Hoover dam for resistance.
Integra is offline  
Old 07-12-2012, 09:26 AM
  #11  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default

Originally Posted by Integra View Post
If your Pack is Dumping down to 15.1 after only a few starts and not recouping itself withing a few seconds, I would venture to say either the battery is shot or there's some Serious resistance going on in the box.

Ill assume you still have the Stock Tamiya Connector's in the box ? If so Cut those out in favor of Hard wiring. Those Tamiya connector's are like the Hoover dam for resistance.
Can't believe I forgot another thing, I think it drained quick because it was rubbing against the chassis at times, this is while I was trying to adjust the starter box, so not just a few starts and I assume this is why its been getting hot and draining quick?

And no, I'm using deans connectors. How would I charge it if its hard wired?
chopper82p is offline  
Old 07-12-2012, 08:43 PM
  #12  
Tech Fanatic
iTrader: (10)
 
TX_Punisher's Avatar
 
Join Date: Feb 2011
Location: Republic of Texas
Posts: 810
Trader Rating: 10 (100%+)
Default

It shouldn't be dropping down to 15.1v only after "a few starts" from ~16.8v.
TX_Punisher is offline  
Old 07-13-2012, 09:12 AM
  #13  
Tech Elite
iTrader: (89)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 3,028
Trader Rating: 89 (100%+)
Default

I beleive you have a defective motor in the starter box. Your drawing so much current thru the motor you are exceeding the discharge c rating of the battery. You said the battery voltage drops only after a couple cycles of the starterbox. Is this with no load? and not rubbing on the chassis. With no load on the motor you should not draw enough current to cause your battery voltage to drop that fast and heat up that quick.


Pass you soon...
lil-bump is offline  
Old 07-13-2012, 01:38 PM
  #14  
Suspended
Thread Starter
iTrader: (7)
 
Join Date: Nov 2011
Location: Westchester, NY
Posts: 1,012
Trader Rating: 7 (73%+)
Default

Originally Posted by lil-bump View Post
I beleive you have a defective motor in the starter box. Your drawing so much current thru the motor you are exceeding the discharge c rating of the battery. You said the battery voltage drops only after a couple cycles of the starterbox. Is this with no load? and not rubbing on the chassis. With no load on the motor you should not draw enough current to cause your battery voltage to drop that fast and heat up that quick.


Pass you soon...
Like I said, it was rubbing on the chassis, so thats why, it was under a lot of load.

The motors were working fine with NIMH batteries, but since then the setup of my car on the box has been messed up, fixed now though.
chopper82p is offline  
Old 07-14-2012, 06:42 AM
  #15  
Tech Elite
iTrader: (89)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 3,028
Trader Rating: 89 (100%+)
Default

I'm glad you got it fixed.


Pass you soon...
lil-bump is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.