Questions and Answers If you have general RC questions or answers discuss it here.

Lipo swelling?

Reply

Old 11-16-2017, 04:12 PM
  #1  
tazzzz
Thread Starter
 
Join Date: Mar 2007
Location: wilmington, NC
Posts: 684
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Lipo swelling?

i have 4 heli-max lipo batteries. 1s 3.7v 30c 1200 mah. The outside cases seem to have an air pocket or something. The batteries don't seem to be swollen at all. Squeezing the main body has a little give ...not warm or hot. Just wondering if this is normal or not....tower has discontinued this particular battery,,was just wondering if they're having problems with this particular one... I'm just starting to use lipos. Just want to be safe. Any direction would be appreciated,as I here horror stories about them. Using these batteries in a helimax 230 drone.
Thanks a million. TAZZZZ
tazzzz is offline  
Reply With Quote
Old 11-16-2017, 09:17 PM
  #2  
kdunlap
My Feedback: (12)
 
Join Date: Sep 2004
Location: McLean, VA
Posts: 233
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Can you post a picture? Generally speaking, lipos are very firm and don't have a jello or air pocket type feeling. These batteries are great, but you need to respect them. Charge with a high quality charger, store around 70 degrees, keep at storage charge when not using. and... if they become puffy or squishy or feel like they have an air pocket, discharge them and toss them out. You seem to be describing a cell that has a problem. But, a picture is worth a thousand words.
kdunlap is offline  
Reply With Quote
Old 11-17-2017, 08:55 AM
  #3  
rgburrill
 
rgburrill's Avatar
 
Join Date: Dec 2010
Location: Trumbull, CT
Posts: 2,135
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

If you really "just want to be safe" take them to a battery disposal center.
rgburrill is offline  
Reply With Quote
Old 11-17-2017, 09:41 AM
  #4  
raptureboy
 
raptureboy's Avatar
 
Join Date: Dec 2005
Location: Kempton PA
Posts: 2,620
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

You need to test the individual cells and find out if there is any drastic difference in voltage between them. if more than a few tenths per cell then they are not worth messing with. Some where along the line they were severely discharged, this is the most common cause. I try never to fly mine below 50%
raptureboy is offline  
Reply With Quote
Old 11-18-2017, 07:45 PM
  #5  
jester_s1
Moderator
 
Join Date: Dec 2006
Location: Fort Worth, TX
Posts: 6,668
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Some sources say that lipo swelling, especially when they are fairly new, is just the result of water vapor trapped inside the wrapping due to being manufactured in a humid environment. If the helicopter still runs well with them and they don't get hot, there probably is no reason to worry.
jester_s1 is offline  
Reply With Quote
Old 11-18-2017, 08:45 PM
  #6  
GREG DOE
 
Join Date: Jul 2005
Location: , TN
Posts: 679
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

The Chinese have built their battery factories in the driest humidity climate areas in China. Some peoples heads will explode at this thought, but if you do an internet search of how to salvage puffing lipo's there's a guy who just punches a hole in the individual cells, squeezes out the "gas" and coats the puncture with some adhesive that looks like Goop. My limited experience is that batteries that are stored for long periods fully charged are most likely to puff. If you don't plan on flying for a couple of weeks use your smart charger to bring the battery voltage to the storage level.
GREG DOE is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service