Hillhater wrote:Is copper corrosion a real problem ?
It certainly forms a greenish corrosion layer quite quickly in damp atmosphere, but that also becomes a protective layer such that its common for copper to be used as a long lasting cladding and roofing on some quality buildings..
I dont imagine we would expect our battery packs to be exposed to any significant harsh environments.
I will be interested to see how much the Nickle plating improves the weldability...are you planning to test weld soon ?
On a similar front, has anyone considered or attempted using spot welded Aluminium strip ?
I realise spot welding may be difficult, but i wonder if it is realistic to consider with better weld systems now available ?
looks good... but what is the tool in use there ?Matador wrote: [youtube]**URBtCgzV9NQ[/youtube]
Seems very feasable with aluminium... And I think alus is 60-65% IACS which is more than enough...
A remotely possible problem is aluminium is more prone to fatigue than copper... at least I heard that somewhere...
..If you mean like a conventional "clamp electrode " spot welder,..i dont think so...spinningmagnets wrote:The other electrode is directly underneath the two sheets that are being welded together.
The corrugated aluminum sheet is attached to the base sheet using the CD630DPM2 set at 380ws energy. The PASP-HP is configured with 1awg cables and an 1/8" copper electrode with a slightly tapered tip. Welds are quick and easy to perform as can be seen in the video. It is helpful to keep the flat tip of the electrode level with the work piece during the weld since uneven pressure can cause sticking or blow through.
Resulting welds are strong and a pull test shows good nugget size with some flagging.
The CD630DPM2 is ideal for performing your aluminum sheet welds. The PASP-HP allows operators to quickly place welds in hard to reach locations but an opposed type weld head such as the WH1125A would be ideal since there is greater control over electrode positioning and force (less chance of operator error).
https://es.wikipedia.org/wiki/%C3%81cid ... C3%ADdricoSalfumant - Spanish - English Translation and Examples - MyMemory
Salfumant, Hydrochloric acid,
Hydrochloric acid, muriatic acid , salt spirit , marine acid , acid salt or even occasionally called hydrochloric acid (imprecise and unnecessary translation of English hydrochloric acid ), strong water or salfumán (in Spain), is an aqueous solution of the gas Hydrogen chloride (HCl).
..just to save me searching for this test....has anyone verified the actual effects of the plating when spot welding copper ?spinningmagnets wrote:Copper is very difficult to spot-weld, but makes a good conductor. Readily available and cheap. Many home battery pack builders already have a spot-welder, so...if nickel-plating can make copper buses easy to spot-weld, that would be helpful to many builders here.