Car batteries are designed to handle sudden current surges such as the self starter kicking on. They are not designed for deep cycling like inverter batteries. Deep cycling a car battery 5-6 times would kill it. That having been said, car batteries may/might be suitable for welding provided arc is run only for few seconds at a time. Also, the “electrode” that is mentioned in the clip may not be the regular welding electrode. It could be carbon/graphite electrode. The heat is enough for small @ home welding.
73
Rajesh VU3RGK
From: HamBrewers@yahoogroups.com [mailto:HamBrewers@yahoogroups.com] On Behalf Of Prasad Agrahar
Sent: Tuesday, March 13, 2012 4:38 AM
To: HamBrewers@yahoogroups.com
Subject: Re: [HamBrewers] Welding with Batteries
That could be very risky. Batteries are often known to explode when subjected to short-circuit-like situations. They generate so much of gases (oxygen + hydrogen) that they explode due to pressure. In early eighties I worked as a R&D engineer in an automotive electrical machines factory and I have seen these accidents happening a few times. The result was never very pleasing.
Possible that the battery technology has evolved into safer batteries, who knows. I may be wrong.
-Prasad
From: Aravind Balasubramanian (VU2ABS) <vu2abs@gmail.com>
To: HamBrewers@yahoogroups.com
Sent: Monday, March 12, 2012 4:12 PM
Subject: [HamBrewers] Welding with Batteries
http://www.4x4ham.com/content.php?213-Trail-Welding-with-Batteries&s=d8999bc7f6b6c4937685592a9e5f7ae7
<http://www.4x4ham.com/content.php?213-Trail-Welding-with-Batteries&s=d8999bc7f6b6c4937685592a9e5f7ae7>
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