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Old 06-10-2018, 04:35 PM   #1
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Exploding battery

What a weekend. Friday afternoon the main power poll fell down knocking power out of the rv park. I went to start the dolphins engine and got nothing more click click click. Well one more try and got and explosion that brought out neighbors 3 doors away. The engine battery blew up. I mean the freaking thing exploded in the battery box. 4 hours later I had the mess cleaned up and everything back to normal. I don't know I could of prevented this.
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Old 06-10-2018, 05:14 PM   #2
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"I don't know I could of prevented this."


Loosen and clean battery cables and terminals.


Sounds like there may have been a battery terminal that was not making good contact with the battery cable to it. The last click of the key may have broke down the the poor connection with a small spark or arc and ignited hydrogen in the battery.



If the battery is quite old, corrosion INSIDE the battery may have advanced enough to fuse open a connection between cells and internally arced with same results.
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Old 06-10-2018, 05:29 PM   #3
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Quote:
Originally Posted by M&EM View Post
"I don't know I could of prevented this."


Loosen and clean battery cables and terminals.


Sounds like there may have been a battery terminal that was not making good contact with the battery cable to it. The last click of the key may have broke down the the poor connection with a small spark or arc and ignited hydrogen in the battery.



If the battery is quite old, corrosion INSIDE the battery may have advanced enough to fuse open a connection between cells and internally arced with same results.
I agree, a corroded terminal created a resistance. When you tried to start the engine, the battery began to off gas. The resistance of the corroded connection caused the terminal to heat up and ignite the hydrogen gas being driven off the battery during cranking.

Fully Preventable.
Remove the cables, soak in baking soda/warm water solution then brush the connection to clean. Assemble using a dielectric Grease to seal the connection.

Careful you don't allow any of the backing soda solution to get into the cells. Soda will kill your battery....
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Old 06-10-2018, 05:40 PM   #4
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Terminals get cleaned twice a year. There was no indication of corrosion. The battery was 6 years old. We were lucky no one got injured. The battery box did it's job.
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Old 06-10-2018, 05:51 PM   #5
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I have had a few explode , and none were because of bad connections , although it is a possibility. In all cases , the battery had been on a charger and fully charged. They were all older batteries. The hydrogen and oxygen gasses build up inside the battery , and in the compartment if it is no properly vented. When a large load , such as a starter is applied , all you need is a small spark from a bad connection or internal battery problem. If your connections were good , there is no way to prevent them from exploding.
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Old 06-11-2018, 07:35 AM   #6
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The clicking when you tried to start it indicated a bad or corroded battery cable connection.
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Old 06-11-2018, 07:49 AM   #7
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Quote:
Originally Posted by speed racer View Post
The clicking when you tried to start it indicated a bad or corroded battery cable connection.
Thanks for that! I'm 63, I've heard the sound of a dead battery before.
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