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Unread 15-08-2013, 11:42
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,798
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Re: BatteryBeak: Utility of making internal resistance and state of charge measuremen

[quote=evanperryg;1287356...We figured it was a fluke and threw it on the charger. about 5 minutes later, I go and check this battery to see if it is ok. The thing is hot(as in burn-your-hands hot) and still at 8v. Long story short, nothing is a fluke with a battery.[/quote]
This is not unusual, the battery shorted two cells internally and the heat produced was coming from the energy conversion in those two cells. The battery was likely producing steam and vapor as well. Often a close examination of the battery case would reveal evidence a drop or severe shock.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.