1. Put on shelf in garage. 2. Come back several years later.
3. End of story. Please do not ruin your cells by charging them with a 12v bat charger as suggested. They will not be balanced and the higher cells will be damaged. I have not heard of LifePo4 discharging, even when left for several years. Many projects take a year or two to put together. The batts may be 2-3 years old before they even get on the road. No worries, that's why you bought LifePo4! Cheers, On Sat, Dec 28, 2013 at 5:01 AM, Willie2 <[email protected]> wrote: > On 12/28/2013 05:43 AM, matt lacey wrote: > >> Hi Buddy, >> >> are these cells brand new - never used? >> >> if so, they are already at 50% soc - they come from the factory like that >> after the capacity test and sort process >> >> just store them as is - they don't discharge (I have cells that have been >> in storage for 3 years that are all still exactly 3.30v) >> > > I generally agree. They come about 50% charged. There is no practical > way to determine state of charge without cycling them. Which is not very > practical. I have not had cells go bad from being stored several years. > I've been tempted to connect them in parallel and put a small charger and > a single bypass module on them. I'm sure they do self discharge, it just > seems to be not very significant. Apparently, it is less than the > generally advertised rate of 1% per month. > > I think it is safe to store them for 3+ years without replenishing the > charge. > > OTHO, I have had cells go bad after being stored in a car for only a few > months with the BMS modules active. > > _______________________________________________ > 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) > > -- Marcus Reddish -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131228/b99286e8/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)
