Chris Bott - Moderator Posted January 9, 2009 Share Posted January 9, 2009 I have my hands on a battery tab welder, but I'm having lots of trouble sourcing any Pure Nickel tabs. They need to be thin sheet or strip but a bit bigger than the ones used on AA batteries, because I want to use them on A123's which are 25mm diameter. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted January 9, 2009 Share Posted January 9, 2009 Ooooo nice one Chris - have you tried John Emms ' Puffin Models ? Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted January 9, 2009 Author Share Posted January 9, 2009 Thanks Timbo thats a thought I'll send him an email.I've had some from Overlander but they are small offcuts, will be fine for AA's but a bit small for my application Quote Link to comment Share on other sites More sharing options...
Wendy hall Posted May 19, 2010 Share Posted May 19, 2010 Chris, Where did you get a battery tab welder from? Trying to find somewhere that sells them.. Thanks Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted November 2, 2010 Author Share Posted November 2, 2010 Wendy So sorry, I must have completely missed your question. I am in fact attempting to make my own. Not a route I would recommend. I am having a little success but it is just not predictable enough yet. Quote Link to comment Share on other sites More sharing options...
StarLoc FiveStar Adhesives Posted November 3, 2010 Share Posted November 3, 2010 We bought the strip from the cell manufacturers that supply the cells, most manufacturers of cells will supply it. Its not going to be easy to make a welder with decent welds to a cell every time . As well as the weld time and power you need to be able to alter the pressure it pushes down with as well , any change in one needs a change of the rest, The welder we have has a lot of settings (no idea whats inside!) , we bought it off PowerMax back round 1998 it was used to do nicad packs and also put the elements in glowplugs Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted November 5, 2010 Author Share Posted November 5, 2010 Hi 5* (Of the absolutely excellent cellulose dopes) I've now had some nickel tabs arive in the post and have managed some decent welds. The problem now is that they are very inconsistent. This is probably due to all your reasons above. I can change the weld power easily enough, the weld time is purely down to how long my capacitor takes to discharge. At the moment I'm using two hand held copper prods, so I can alter pressure, but only by feel. As you can imagine, I'm getting some interesting fireworks now and again. Especially if I don't keep cleaning the probes, or don't apply much pressure. Next will be something to hold the batteries still, and a footswitch so I have two hands free.... Quote Link to comment Share on other sites More sharing options...
StarLoc FiveStar Adhesives Posted November 5, 2010 Share Posted November 5, 2010 They can produce some interesting sparks....ours has a foot pedel that pulls down the prongs, as they push onto the cell theres a spring loaded adjustable thingamy on the top that as it gets to the correct pressure triggers the weld and then automaticaly releases the pressure after the set time , so theres no need to release your foot off the pedle untill it pops and clicks back up. So you stuff the cell underneath, pull the pedel down and its all done automaticaly , the weld is set on the dials on the box with the circuits in and the pressure on the top right above the electrodes it can be interesting setting it up with too much pressure as you blow holes in the cell, too little pressure you blow the strip to bits Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted November 5, 2010 Author Share Posted November 5, 2010 mmm... I'm a long way off that much automation. And unfortunately the incentive has gone away for the time being as those yellow cells, bought on ebay as genuine A123 1100's are certainly not genuine... They are pretty good physical copies, but performance is very poor. I've been robbed again But thanks, I can see how a spring drill type stand with a cord through the bench to a pedal would help a great deal Edited By Chris Bott on 05/11/2010 17:45:25 Quote Link to comment Share on other sites More sharing options...
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