mowhoong
Guest
Sun Jan 29, 2012 6:12 pm
When I dismantled the battery pad, I noticed there were spot welded on
to the nickel plate on the battery terminal. This nickel plate is used
to connect the batteries in series or parallel.
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
Randy Day
Guest
Sun Jan 29, 2012 7:27 pm
In article <0070a1f6-8f2a-49f0-be76-
4bcb851762ce_at_b10g2000pbd.googlegroups.com>, mowhoong_at_hotmail.com says...
[snip]
Quote:
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
Mechanical stiffness, perhaps, or maybe
nickel-plated is cheaper than copper as
a commodity right now?
John Larkin
Guest
Sun Jan 29, 2012 8:28 pm
On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
<mowhoong_at_hotmail.com> wrote:
Quote:
When I dismantled the battery pad, I noticed there were spot welded on
to the nickel plate on the battery terminal. This nickel plate is used
to connect the batteries in series or parallel.
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
The nickel spot welds better.
--
John Larkin, President Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com
Precision electronic instrumentation
Picosecond-resolution Digital Delay and Pulse generators
Custom timing and laser controllers
Photonics and fiberoptic TTL data links
VME analog, thermocouple, LVDT, synchro, tachometer
Multichannel arbitrary waveform generators
Jamie
Guest
Sun Jan 29, 2012 8:38 pm
Randy Day wrote:
Quote:
In article <0070a1f6-8f2a-49f0-be76-
4bcb851762ce_at_b10g2000pbd.googlegroups.com>, mowhoong_at_hotmail.com says...
[snip]
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
Mechanical stiffness, perhaps, or maybe
nickel-plated is cheaper than copper as
a commodity right now?
galvanic electrolysis?
Jamie
krw@att.bizzzzzzzzzzzz
Guest
Mon Jan 30, 2012 12:29 am
On Sun, 29 Jan 2012 11:28:49 -0800, John Larkin
<jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
Quote:
On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
mowhoong_at_hotmail.com> wrote:
When I dismantled the battery pad, I noticed there were spot welded on
to the nickel plate on the battery terminal. This nickel plate is used
to connect the batteries in series or parallel.
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
The nickel spot welds better.
....and doesn't corrode as badly.
Peter Bennett
Guest
Mon Jan 30, 2012 1:47 am
On Sun, 29 Jan 2012 18:29:26 -0500, "krw_at_att.bizzzzzzzzzzzz"
<krw_at_att.bizzzzzzzzzzzz> wrote:
Quote:
On Sun, 29 Jan 2012 11:28:49 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
mowhoong_at_hotmail.com> wrote:
When I dismantled the battery pad, I noticed there were spot welded on
to the nickel plate on the battery terminal. This nickel plate is used
to connect the batteries in series or parallel.
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
The nickel spot welds better.
...and doesn't corrode as badly.
.... and the resistance of the short bit of nickel is insignificant.
--
Peter Bennett, VE7CEI
peterbb (at) telus.net
GPS and NMEA info:
http://vancouver-webpages.com/peter
Vancouver Power Squadron:
http://vancouver.powersquadron.ca
Phil Allison
Guest
Mon Jan 30, 2012 1:57 am
"Peter Bennett"
Quote:
The nickel spot welds better.
...and doesn't corrode as badly.
... and the resistance of the short bit of nickel is insignificant.
** The resistance is what makes it spot weld nicely - but it is not
entirely insignificant, if the pack is used at a high enough discharge rate.
Spot welds in thin steel tend to vary in quality and some have high enough
resistance to cause voltage drop and localised heating of a pack of NiCd or
NiMH cells.
RC plane, car and boat enthusiasts tend to avoid them and prefer soldered,
thick copper wire links between cells.
..... Phil
George Herold
Guest
Tue Jan 31, 2012 6:03 am
On Jan 29, 6:29 pm, "k...@att.bizzzzzzzzzzzz"
<k...@att.bizzzzzzzzzzzz> wrote:
Quote:
On Sun, 29 Jan 2012 11:28:49 -0800, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
mowho...@hotmail.com> wrote:
When I dismantled the battery pad, I noticed there were spot welded on
to the nickel plate on the battery terminal. This nickel plate is used
to connect the batteries in series or parallel.
I do not understand why copper wire was not use instead ,as copper
wires are commonly use in electronic circuits. Is there any reason ?
Appreciate your explanation.
Regards
The nickel spot welds better.
...and doesn't corrode as badly.
Spot welding copper is a PITA...
(having made many type T? copper constantan TC's
with and without spot welder.)
George H.
