[KYHAM] Properly wiring up a battery pack

Tue, 9 Jul 2002 06:44:53 -0700

O' My!

It may be wise to get a custom made insert for a hand held battery pack in
order to rebuild it.  The commercial way is to use a low energy spot welder
to weld a stainless strap between the cells wired plus to minus in a series.
A capacitive discharge spot welder would be possible to home brew.  In the
instrumentation industry, we use small special spot welders to attach strain
gages pre mounted on 0.005-inch stainless shim stock to thick steel
structures.  The maximum energy is only 50 joules or watt-seconds.

Soldering cells is generally difficult and can damage the cells.  I don't
know of any hams that are set up to spot weld the cells straps, but someone
may read this and give you some hints.

Dave W8YZ

David Smith W8YZ
Technical Coordinator
Michigan Section ARRL
Monroe, Michigan 48162-2943
Phone 734-242-5589
Fax 734-242-8413
Cell 734-479-4686
E-Mail: [email protected]
OR: [email protected]
Please visit our websites at:
http://www.arrl.org/sections/index.html?sect=MI
Or:
http://www.msp.state.mi.us/division/emd/staff.html

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of John Betner
Sent: Monday, July 08, 2002 8:45 PM
To: [email protected]
Subject: [KYHAM] Properly wiring up a battery pack

I have just bought some replacement batteries for a battery pack thing is I
don't know how to put them in order and which to go + + or - + or +- or - -
lol and what kind of solder do I need to get it to stick properly any help
would be greatly greatly appreciated

73s

John Betner
Custer Area Vol. Fire & Rescue
Ham Radio Operator: KG4LHQ

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