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From: John Larkin
Subject: Re: Reducing contact resistance for low volt use?
Date: Tue, 10 Dec 2002 19:14:44 -0800
Organization: Posted via Supernews, http://www.supernews.com
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On Tue, 10 Dec 2002 23:01:08 GMT, jmuchow@SPAMMENOTcamlight.com (John
>I've been moving forward with designing a constant-current battery
>discharger (thanks to a lot of help from this group) but realized that
>I'm going to run into problems unless I can reduce the resistance
>between the contacts of the discharger and the battery cell terminals.
>One of the discharger's functions is to discharge individual NiCd and
>NiMH cells at levels from 0.25A to 100A (and feed voltages to data
>logging software for plotting). Keeping the resistance of the
>discharger low enough to get 100A from a 1.2V cell is one heck of a
>I don't think that merely pressing spring loaded (or screw-tightened)
>metal contacts against the cell terminals will work well enough. And
>soldering 4AWG wire to each cell being tested is a huge PITA (and can
>easily fry the cell if not done properly).
>I was wondering if an electrically conductive compound might be the
>solution? I've seen silver-filled conductive epoxies, but not a
>"grease" or similar non-adhesive compound.
>Does anyone have any conductive compound recommendations or ideas as
>to how I might be able to reduce the resistance between the discharger
>contacts and the battery terminals?
there's lots of stuff like this...
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