Curious to know ?

M

mowhoong

Guest
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
 
In article <0070a1f6-8f2a-49f0-be76-
4bcb851762ce@b10g2000pbd.googlegroups.com>, mowhoong@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
Click to expand...
Mechanical stiffness, perhaps, or maybe
nickel-plated is cheaper than copper as
a commodity right now?
 
On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
<mowhoong@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
Click to expand...
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
 
Randy Day wrote:

In article <0070a1f6-8f2a-49f0-be76-
4bcb851762ce@b10g2000pbd.googlegroups.com>, mowhoong@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?
Click to expand...

Jamie
 
On Sun, 29 Jan 2012 11:28:49 -0800, John Larkin
<jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
mowhoong@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.
Click to expand...
....and doesn't corrode as badly.
 
On Sun, 29 Jan 2012 18:29:26 -0500, "krw@att.bizzzzzzzzzzzz"
<krw@att.bizzzzzzzzzzzz> wrote:

On Sun, 29 Jan 2012 11:28:49 -0800, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sun, 29 Jan 2012 08:12:14 -0800 (PST), mowhoong
mowhoong@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.
Click to expand...
.... 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
 
"Peter Bennett"

The nickel spot welds better.

...and doesn't corrode as badly.

... and the resistance of the short bit of nickel is insignificant.
Click to expand...

** 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
 
On Jan 29, 6:29 pm, "k...@att.bizzzzzzzzzzzz"
<k...@att.bizzzzzzzzzzzz> wrote:
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.
Click to expand...
Spot welding copper is a PITA...
(having made many type T? copper constantan TC's
with and without spot welder.)

George H.
 
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