Welding with Two AGM Batteries

Submitted: Tuesday, Jun 05, 2012 at 16:29
ThreadID: 96048 Views:2643 Replies:7 FollowUps:1
This Thread has been Archived
Gday all,

after researching 12 volt welding It appears that most situations have been with acid batteries.

My question is can you use 2 x AGM batteries that have the bolt in the top instead of the posts?

Any Info appreciated
Back Expand Un-Read 0 Moderator

Reply By: Cravenhaven - Tuesday, Jun 05, 2012 at 18:18

Tuesday, Jun 05, 2012 at 18:18
Its probably bad for any battery given the large and intermittent currents being drawn, but unless you were planning to build the queen mary I dont see that its a huge issue for the odd repair.
AnswerID: 487726

Reply By: Cravenhaven - Tuesday, Jun 05, 2012 at 18:18

Tuesday, Jun 05, 2012 at 18:18
This post has been read by the moderation team and has been moderated due to a breach of The Double-up Post Removed Rule .

Forum Moderation Team
AnswerID: 487727

Reply By: olcoolone - Tuesday, Jun 05, 2012 at 18:44

Tuesday, Jun 05, 2012 at 18:44
A battery is a battery and in most cases when you have to weld this way it's in an emergency situation.

AGM's are fine for very high current discharge as long as you don't do it all the time.

2 x 100 amp hour batteries will give you about 3 hours of constant weld time on 3mm material using 2.5mm rods...... that's a hell of a lot of welding.

If your going to use batteries with a threaded post all you do is make up a bridging lead with two battery lugs on it and do the same for the negative and positive.

If welding under 3mm material use the positive for the earth clamp and negative for the electrode holder...... 3mm and over use the negative for the earth and positive for the electrode holder.

Don't worry about trying to make it variable.

The other option is to use the welder another member (Mick O) has..... a hand held mig welder.
AnswerID: 487734

Reply By: Peter_n_Margaret - Tuesday, Jun 05, 2012 at 19:43

Tuesday, Jun 05, 2012 at 19:43
I carry (and use) a ''Ready Welder 2'' which is a 24V or 36V DC MIG.
It is spectacularly good and can also weld aluminium (with gas). Over 200A of welding power if required.

Cheers,
Peter
OKA196 Motorhome
AnswerID: 487744

Reply By: Member - Redbakk (WA) - Tuesday, Jun 05, 2012 at 19:45

Tuesday, Jun 05, 2012 at 19:45
I found that 3 batteries in series I was able to get a better strike and contiuous weld.

Also I make the positive the earth and the stick the negative.

That's just me though.
AnswerID: 487745

Follow Up By: Member - Redbakk (WA) - Tuesday, Jun 05, 2012 at 19:47

Tuesday, Jun 05, 2012 at 19:47
I have made the leads and connectors required as a kit which is part of my gear.
0
FollowupID: 762987

Reply By: Mick O - Tuesday, Jun 05, 2012 at 21:28

Tuesday, Jun 05, 2012 at 21:28
We managed to weld a two piece trailer into a one piece trailer with a couple OF agm's (screw in terminal type as mentioned above). The greatest difficulty is actually regulating the current. We've used jumper leads for this adding length or number 8 fencing wire for resitance ( it turns to plasma pretty quickly). Three batteries will often run things too hot. What ever the results, they don't have to be pretty, just effective. AGM"s will be fine unless your trying to weld peace in the middle east....that'll probably take a fourth battery!!



The back half of this video has some interesting snippets of the Ready Welder 2 and that trailer I mentioned above (sorry Scotty!).




Ah bush welding....may you never need to use it!

A day of bush welding


Cheers Mick



''We knew from the experience of well-known travelers that the
trip would doubtless be attended with much hardship.''
Richard Maurice - 1903

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 487756

Reply By: ingo57 - Friday, Jun 08, 2012 at 10:26

Friday, Jun 08, 2012 at 10:26
Thanks guys,

Will go ahead and make one up.

Cheers
AnswerID: 487925

Sponsored Links

Popular Products (13)