Direct soldering might be a little risky - if memory serves, Lithium
batteries are prone to exploding in rather a nasty fashion if they get too
hot. Whenever we put (NiCad) batteries onto a board, they are put into
sealed carriers with higher-than-normally-rated spring clips. The carriers
are are soldered to the board, the batteries inserted and the edges of the
battery bonded to the carrier for added security when operating in harsh
environments. The carriers are closed up and the boards are coated. So far
there haven't been any contact failures.

Pete Duncan




                    "Bissonnette,
                    Jean-Francois"         To:     [log in to unmask]
                    <JBissonnette@W        cc:     (bcc: DUNCAN Peter/Asst Prin Engr/ST Aero/ST Group)
                    ABTEC.COM>             Subject:     [TN] Soldering batteries on boards
                    Sent by:
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                    <[log in to unmask]
                    G>


                    05/25/01 04:06
                    AM
                    Please respond
                    to "TechNet
                    E-Mail Forum.";
                    Please respond
                    to
                    "Bissonnette,
                    Jean-Francois"






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


WABTEC CORPORATION CONFIDENTIALITY NOTE
The content contained in this e-mail transmission is legally privileged and
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copying of this transmission is strictly prohibited.
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


WABTEC CORPORATION CONFIDENTIALITY NOTE
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 dissemination, distribution, or
copying of this transmission is strictly prohibited.

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