I doubt this too. I've never heard of these cells being damaged or overheating through *correct* charging, although I'm only familiar with the water-cooled variety.
I have heard of one Saft pack being cooked. IIRC it was a Manzanita PFC charger, something to do with it restarting as the voltage dropped, then thermal runwaway at bulk charge current. This is not charging to spec though. On Wed, Apr 2, 2014 at 3:08 PM, EVDL Administrator <[email protected]> wrote: > On 31 Mar 2014 at 2:54, Jan Steinman wrote: > > > he person I got these batteries from fried individual batteries -- I > > mean internally melted! -- by charging them to spec in a 144V string! > > I've heard of this happening from gross overcharging, but NEVER when they > were "charged to spec" (in accordance with Saft's specifications). > > I don't recommend it, but you can gas these batteries all day at 7 amps > with > no significant harm, just like you can trickle charge small (AA-D) NiCd > cells forever with little or no effect on cycle life. > > There were problems with early STM5-100MRs and I think also with STM5- > 140MRs. When used at anything over 2C5 to 2.5C5, the separators would > fail, > IIRC, often with catastropic results. However, Saft STM5-180s are strudy > batteries. > > You do not need regulators at the battery or cell level. > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/help/ . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140402/ed5136e3/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
