Hello Miro
Best deal is to use an activated flux (acid) you need so little flux on the tip of the solder that you can't even see it. Just tin the nickel plate or stainless of the cell and finish the job with the usual 63/37. The stainless conducts so poorly that it takes practically no heat (in calories) to get the job done. The admonishment not to solder to nicads must have been started by a guy who tried to do it with a 500 watt iron and rosin core solder, will never happen that way. Acid core solder doesn't work very well by the way but the flux that tastes like lemon juice (we use it on our SMT line) works great.
Eric
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At 04:07 PM 3/20/04, Miroslav Pokorni wrote:
Hello everyone,
Does anyone have an experience with spot welding tabs on a subC size NiCd
batteries? I have a stack of ten batteries which were connected with nickel
plated iron (?) tabs, welded at four spots at each end of tab, but a tab
came loose on one cell.
I was thinking of using large cap (10,000 mictoF or so), charged to 50 V or
so, a suitable switch (perhaps mercury displacement) and short, thick and
solid wires as electrodes. I need to make only four welds, so 'electrodes'
can be consumable.
I do not intend to break any new grounds, looking for someone's prior
experience.
Thank you in advance,
Miroslav Pokorni
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