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Old 03-29-2010, 07:50 PM   #381 (permalink)
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Quote:
Originally Posted by vpoppv View Post
Ok, I can now confirm that lead/acid batteries can/do explode.....
Wash your hands/face/body, get the baking soda, THEN grab your camera so we all can see!

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Old 03-30-2010, 06:40 PM   #382 (permalink)
The $500 Electric Car
 
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Ok, so I had one battery that was showing pretty low voltage after commute, like in the 9 volts range, so I knew it was having some trouble. So Yesterday I am on my way to work, and I get most of the way there when I heard a VERY loud "pop". I immediately knew what it was:





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Old 03-30-2010, 10:58 PM   #383 (permalink)
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Um.....OUCH.
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Old 03-30-2010, 11:46 PM   #384 (permalink)
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Are those cells bone dry!?!?!? Wow, that is what heck of a boom. Did you have to tow it home, or did you just bypass the battery and continue?
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Old 04-01-2010, 01:00 PM   #385 (permalink)
The $500 Electric Car
 
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Are those cells bone dry!?!?!? Wow, that is what heck of a boom. Did you have to tow it home, or did you just bypass the battery and continue?
Yes, big boom. Tow Geo and tow rope to get it home. I think I'll put the alum battery back in to replace the exploded one....
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Old 04-01-2010, 11:19 PM   #386 (permalink)
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Wow. What do you think happened?

Cell reversal & overheating?
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Old 04-02-2010, 01:49 AM   #387 (permalink)
The $500 Electric Car
 
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Wow. What do you think happened?

Cell reversal & overheating?
Yeah, I'll go with that.....
I was really pushing my luck with that battery as it was and am not at all surprised it happened. I am actually pretty lucky that the one I converted to alum didn't do that before the conversion: it was showing way too low a voltage after commute as well. This gives me even more incentive to relocate the 2 batteries in the trunk outside passenger compartment.
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Old 04-02-2010, 09:59 AM   #388 (permalink)
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My car uses gel cells that are inside the passenger compartment, but sunk below the back seat. (Where the gas tank was.)

That is then covered with 3/4" plywood with carpet over that.

The one time I accidentaly shorted 144V, I was glad that there was that chunk of plywood between me and the battery terminal.
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Old 04-03-2010, 11:42 AM   #389 (permalink)
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Wow. Well, before I got the battery pack monitor, I reversed cells in a couple of batteries (2 or maybe 3).

When reversal happens, I believe you're effectively charging that cell at whatever amperage you're drawing from the pack at the moment. (For me, that could be anywhere from typically 75-200+ amps!) Which means that battery is going to get awfully warm, awfully quick plus it'll likely be gassing like crazy and building pressure in the case. POW! :O
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Old 04-03-2010, 10:11 PM   #390 (permalink)
The $500 Electric Car
 
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Interview with the battery that popped: up close and personal....


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