Re: Kaboom--battery questions--Kaboom

Posted by Stan in AL on July 02, 2001 at 07:19:09 from (65.162.104.6):

In Reply to: Kaboom--battery questions--Kaboom posted by Brad Wies (DC-4 DUDE) on July 02, 2001 at 06:06:44:

When batteries are charging they produce Hydrogen gas. It has no odor of it's own, so you're not likely to smell it. If a battery is charging normally, the amount of gas produced isn't very large, and it vents through the caps and escapes into the air. The normal air circulation takes care of it. Hydrogen is lighter than air, so it goes up, out of the way. If the battery charges excessively fast, it can produce lots more hydrogen than normal, and if some of it gets trapped in an enclosed space, and it reaches an ignition source (which can be heat or spark I believe) then it can explode. I've seen 2 batteries explode, luckily no one was hurt either time. If a battery is run down, and you crank the vehicle to recharge it, let it run for a while, then shut it off, then attempt to jump-start it again, you can provide a spark if you make the last connection of the cables at the battery post. That's what I think caused one of the battery explosions I had. It was on a dune-buggy which had the battery mounted in the open. That's why the safe way to connect cables for jump-starting is to make the last connection at a grounding location away from the battery. By the way, hydrogen is the gas that was used in the Hindenburg dirigible, anyone seen the film-clip of the fire that destroyed it? Not a pretty picture. Hope this makes sense to you, and good luck.

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