The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: jmuchow@SPAMMENOTcamlight.com (John Muchow)
Subject: Re: Reducing contact resistance for low volt use?
Date: Sat, 14 Dec 2002 07:49:32 GMT
Organization: MindSpring Enterprises
References: <email@example.com> <firstname.lastname@example.org> <email@example.com> <3DF7101A.694E609E@juno.com> <firstname.lastname@example.org> <email@example.com>
X-Server-Date: 14 Dec 2002 07:49:18 GMT
X-Newsreader: Forte Free Agent 1.21/32.243
>>>Better to spring load some properly machined terminals, then just use
>>>silver or tin plated soft copper foil as the interface between battery
>>>surface and contacts.
I agree that the fusible alloy might not be the best idea...but it is
a fascinating one and solves a big problem.
I am hoping to avoid having to machine a large pile of terminals.
Almost every manufacturer has a slightly different contour for each
cell face and we'll be testing several cells (different sizes and
capacities) from each manufacturer. But, it may be inevitable.
Machining concave rounded faces will not be fun though...heck, we
probably wouldn't even try it. The problem is that a lot of cells
have convex NEG terminals.
If the contact is machined fairly well, won't the foil just prevent a
better connection between the battery and the contact since it will
scrunch/crumple/wrinkle up on the POS terminal end (trying to follow
the contour of the "nub") and maybe on the negative terminal end too
(that face is usually slightly rounded)?
What advantages would the foil interface have?
>>>This can even be used effectively between aluminum and steel hardware.
>>>If the device being tested doesn't have terminals that can withstand
>>>the test, I think the operation is pretty pointless.
Yup. The design of these contacts has turned into a pretty big
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup