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| Date: | Thu, 24 May 2001 15:25:51 -0500 |
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I had an experience like this in a past life. We found out that the battery was intialized when installed. We changed the process to add the battery at the last possible production step.
We also modified our handling proceudres for the following issues:
1) Material staging for the assembly line had the parts being removed from the orignal packaging and then put into a bin for use on the line. We had to change this to maintain the use of the original egg carton.
2) Boards carried had to minimized to one at a time. I saw several operators who might hold two boards and then the batteries were allowed to short to another assembly.
3) Racking ethods allowed the battery leads to touch the rails. We had to go to flat foams. We tried a vertical rack but the assemblies were pretty long and had a high risk of touching when 10 or more were put onto a rack.
Hope this helps. Good luck
Kathy
>>> [log in to unmask] 05/24/01 03:06PM >>>
Hello Technetters,
Is there any knowledgeable person that can tell me the do's and the don't of soldering
a lithium battery on a PCB? Is there any manipulation that could shorten the life
of the battery (other than the obvious leads short....)
We assemble a PCB with such a battery on it and it seems that some of them die
after 50% to 75% of their expected life span. The board are coated with silicone coating
after assembly, and their does not seem to be any leaking according to the tests perform
before shipping.
Thank for any input
JF
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<DIV>I had an experience like this in a past life. We found out that the
battery was intialized when installed. We changed the process to add the
battery at the last possible production step. </DIV>
<DIV> </DIV>
<DIV>We also modified our handling proceudres for the following issues: </DIV>
<DIV> </DIV>
<DIV>1) Material staging for the assembly line had the parts being removed from
the orignal packaging and then put into a bin for use on the line. We had
to change this to maintain the use of the original egg carton. </DIV>
<DIV>2) Boards carried had to minimized to one at a time. I saw several
operators who might hold two boards and then the batteries were allowed to short
to another assembly. </DIV>
<DIV>3) Racking ethods allowed the battery leads to touch the rails. We
had to go to flat foams. We tried a vertical rack but the assemblies were
pretty long and had a high risk of touching when 10 or more were put onto a
rack. </DIV>
<DIV> </DIV>
<DIV>Hope this helps. Good luck</DIV>
<DIV>Kathy <BR><BR>>>> [log in to unmask] 05/24/01 03:06PM
>>><BR></DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>Hello
Technetters,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=796155819-24052001></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>Is there any
knowledgeable person that can tell me the do's and the don't of
soldering</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>a lithium battery on
a PCB? Is there any manipulation that could shorten the
life</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>of the battery
(other than the obvious leads short....)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=796155819-24052001></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>We assemble a PCB
with such a battery on it and it seems that some of them die</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>after 50% to 75% of
their expected life span. The board are coated with silicone
coating</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>after assembly, and
their does not seem to be any leaking according to the tests
perform</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>before
shipping.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=796155819-24052001></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=796155819-24052001>Thank for any
input</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=796155819-24052001></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=796155819-24052001>JF</SPAN></FONT></DIV><CODE><FONT size=3><BR><BR>WABTEC
CORPORATION CONFIDENTIALITY NOTE<BR>The content contained in this e-mail
transmission is legally privileged and confidential information intended only
for the use of the individual or entity named herein. If the reader of this
transmission is not the intended recipient, you are hereby notified that any
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prohibited.<BR></FONT></CODE></BODY></HTML>
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