View Single Post
  #11   Spotlight this post!  
Unread 31-01-2011, 14:42
wilsonmw04's Avatar
wilsonmw04 wilsonmw04 is offline
Coach
FRC #1086 (Blue Cheese)
Team Role: Teacher
 
Join Date: Dec 2006
Rookie Year: 2007
Location: Midlothian, VA
Posts: 1,884
wilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond reputewilsonmw04 has a reputation beyond repute
Re: Tetrix Battery Holder vs. NiMH

Quote:
Originally Posted by PhilBot View Post
I went back to my notes and found that the problem with the batteries wasn't melting, but leaking on the higher charge rate (they did get pretty hot).

The red insulating paper at the end of some batteries were darkenning up due to internal leakage. I reported this and they were replaced, with the recomendation to use the lower charging rate.

The original battery packs had clear heat-shrink, so you could see this problem.

The newer ones now have black heat-shrink....
Unfortunately this masks any potential problem indicator

Phil.
I can second the problem with the older batteries. We had the same problem with leakage. The new batteries are harder to tell if this has been fixed. I'm not sure which was shipped from FIRST choice.
__________________
Currently: Coach FRC 1086/FTC 93
2006-2011 Coach FRC 2106/FTC 35
If you come to a FRC event to see a robot competition, you are missing the point.