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)
