....OK..practical reasons: gas from the batteries had some negative impact
on the boards. Corrosion, if I remember right.
Inge
----- Original Message -----
From: "Hfjord" <[log in to unmask]>
To: "TechNet E-Mail Forum" <[log in to unmask]>
Sent: Monday, June 26, 2006 10:07 PM
Subject: Re: [TN] Plating Recomendation?


> Many  a good advice,. We have done several remarkable designs with
> batteries, finding finally that one had to keep battery and PWB apart
> (speaking big batteries). Practical reasons.
>
> Douglas Brook wrote this about copper traces:
>
> delta T (C)          Trace width (mil)       Trace thickness (oz/sqft)
> Location              Max current (amps)
>
> 20                                50                                    1
> external                            2
> 20                                50                                   10
> "                                  9
> 20                              500                                    1 "
> 14
> 20                              500                                   10 "
> 50
> 20                            2000                                    1 "
> 48
> 20                            2000                                   10 "
> 167
> 50                               50                                    1 "
> 4
> 50                                50                                   10
> "                                 13
> 50                              500                                    1 "
> 22
> 50                              500                                   10 "
> 77
> 50                            2000                                    1 "
> 73
> 50                            2000                                   10 "
> 254
>
> I have this copied into a map with 'good rules'. Think he works at some
> big battery industry in the US.
> It's interesting to see what enormous current capacity copper has, also,
> how important it is to keep an eye on the
> temperature.
>
> Ingemar Hernefjord
> Ericsson Microwave Systems
>
>>
>> Happy Monday!
>>
>>
>>
>> I have a customer (we are a fabricator) asking the following question;
>>
>>
>>
>> "..we are looking at making a board that is intended to be bolted to some
>> batteries through 6mm and 8mm nuts and bolts. I was wondering if you have
>> any recommendations on what sort of plating should be on the pads these
>> nuts
>> are going to screw down onto? The batteries are fairly heavy and the
>> apparatus may be subject to some vibration and shock. Thanks for your
>> insight."
>>
>>
>>
>> I am thinking HASL has been used for years in similar applications but
>> does
>> anyone have any experience or are there any studies on the matter?
>>
>>
>>
>> Regards
>>
>>
>>
>> John Parsons
>>
>>
>>
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 1.8e
>> To unsubscribe, send a message to [log in to unmask] with following text in
>> the BODY (NOT the subject field): SIGNOFF Technet
>> To temporarily halt or (re-start) delivery of Technet send e-mail to
>> [log in to unmask]: SET Technet NOMAIL or (MAIL)
>> To receive ONE mailing per day of all the posts: send e-mail to
>> [log in to unmask]: SET Technet Digest
>> Search the archives of previous posts at:
>> http://listserv.ipc.org/archives
>> Please visit IPC web site
>> http://www.ipc.org/contentpage.asp?Pageid=4.3.16
>> for additional information, or contact Keach Sasamori at [log in to unmask]
>> or
>> 847-615-7100 ext.2815
>> -----------------------------------------------------
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 1.8e
>> To unsubscribe, send a message to [log in to unmask] with following text in
>> the BODY (NOT the subject field): SIGNOFF Technet
>> To temporarily halt or (re-start) delivery of Technet send e-mail to
>> [log in to unmask]: SET Technet NOMAIL or (MAIL)
>> To receive ONE mailing per day of all the posts: send e-mail to
>> [log in to unmask]: SET Technet Digest
>> Search the archives of previous posts at:
>> http://listserv.ipc.org/archives
>> Please visit IPC web site
>> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
>> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
>> ext.2815
>> -----------------------------------------------------
>

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------