Battery explosion [RE-wrenches]

[Ray Walters]

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Hey Randy;

That's a scary story. How big was the battery? Was it sealed or unsealed?
The only battery I ever had blow, was a golf cart battery on a golf cart. 
Those carts often are unfused and a combination of a dead short and a loose 
battery terminal connection caused the lead terminal to melt into a blob 
then into the plastic case where it ignited the hydrogen. After a few 
exciting hydrogen fired seconds it was over.  A friend siliconed up the 
hole and kept using the battery.
Your account sounds much more dangerous. I can't believe 300 milliamps 
could blow anything up, are you sure it was due to overcharging and not an 
extremely high rate of discharge? I've heard of internal battery shorts 
that create so much heat in so little time that the case blows.

Ray




>After having a battery explode in a solar gate opener control box when the 
>gate was left unused for several weeks with a 5 watt uncontrolled PV 
>module, I now always install a small charge controller.  The SunGuard is 
>cheap insurance and peace of mind.
>
>Happy Holidays,
>
>Randy Brooks

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