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Post by rmc on Nov 4, 2012 19:29:48 GMT
Posted by jakeprentice123 on July 30, 2012, from DCI (Discovery Channel International) Mythbusters forums:
can you test the myth that welding on a car with the battery still connected will make the battery explode. Also if attempting to jump a car with the jump leads on the wrong terminals will result in the same thing.
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Post by trakmec on Nov 4, 2012 21:54:39 GMT
rmc: By welding on do you mean actually welding something to the car battery, or using the battery as a power source to weld something else together?
There is no need to weld anything to a battery that I’m aware of. Using a battery to weld something else together is possible, I have seen it done. I don’t think it makes the battery any more likely to explode than any other normal use would.
That said: sparks near a battery that is venting hydrogen gas can and will cause an explosion, this may be the genesis of what you’re talking about
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Post by alabastersandman on Nov 19, 2012 8:48:35 GMT
I used the shop welder years ago to patch my exhaust pipe. The shop foreman told me to dis-connect the battery before I welded to prevent just such an explosion. Though I have no idea if it would actually cause an explosion.
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Post by watcher56 on Nov 20, 2012 0:58:54 GMT
ASM, in that case disconnecting the battery is more of a safety precaution to prevent ground currents from damaging the vehicle's electronic devices.
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Post by silverdragon on Nov 20, 2012 7:35:35 GMT
I have seen this discussed many times on a few boards.
Some points raised worth considering...
Positive or Neutral earth.
Delicate electronics.
"Just in case".
I think all three are good reasons to disconnect the battery.... it only takes a few mins to reset the clock afterwards, so why not?...
As to if it would or would not fry the battery or electronics, that may just be a car by car case?....
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