Tuesday, March 13, 2012

Re: [HamBrewers] Welding with Batteries

 

Rajesh
 
I was quoting from my experience while working in auto-electrical equipment field and we were using automotive batteries larger than car batteries capacities like 85 Ah and bigger. I have personally experienced exploding batteries. Trues they are designed to deliver large current bursts but they can explode under when short circuited.
 
As I said it was long ago. Technology may have eveolved but Internet still has stories of exploding vehicular batteries. Extreme caution is suggested.
 
-Prasad VU2AEA
Olney MD

From: Rajesh K <kc2kby@airtelmail.in>
To: HamBrewers@yahoogroups.com
Sent: Tuesday, March 13, 2012 2:41 AM
Subject: RE: [HamBrewers] Welding with Batteries



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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