Well, as I said recently, I have some headway cells I have stored for 6 months or so, one dropped to 0.8V. the spec says 5% per month self discharge but generally it does seem to be close to zero self discharge.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of matt lacey Sent: Sunday, 29 December 2013 12:44 a.m. To: Electric Vehicle Discussion List Subject: Re: [EVDL] Storing / charging LiFePO4 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) Matt ----- Original Message ----- From: "Buddy Mills" <[email protected]> To: "'Electric Vehicle Discussion List'" <[email protected]> Sent: Saturday, December 28, 2013 6:48 AM Subject: [EVDL] Storing / charging LiFePO4 What is a low cost way to keep/store batteries. I have 18 LiFePO4 cell left over from my switch from lead setting in a box. I got extras for backup and need to store them until I might need them. I know they should be a stored at ½ charge but is there anything else I need to do. I also would like recommendation on a low cost way to charge them for their respite. I would prefer something out of the box that I can purchase. I would be willing to charge them in parallel, individual or groups. And last but not least can someone tell me how I know that they are at ½ charge for storage. The specs are 40ah with 3.6 volt max, 2.5 volt min and nominal of 3.2. Thanks in advance, Buddy Mills <mailto:[email protected]> [email protected] Look mom, no gas. <http://www.evalbum.com/2887> http://www.evalbum.com/2887 Disclaimer: No animals were harmed or killed in the process of writing this email. Any stories to the contrary are, for the most part, either fictional or greatly exaggerated. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131227/cd7d1c89 /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) _______________________________________________ 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) _______________________________________________ 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)
