For the 8 years I've had this pack my practice has been to charge it at a C/15 rate and stop when the first cell hits 3.45V. Its a 18kWh CALB.
You could watch the cells go from ~3.32V to 3.45V pretty quickly, once they left 3.32V they'd be at 3.45V in <2mins and the charge stops. It's been hot, central Texas. I just got back from a range test and it's at 20 miles now. When the pack was new I claimed it had a 50 mile range, but I never went more than about 40 miles. I somewhat eliminated the parasitic load issue (reducing range?) by not letting it sit long after charge. But I plan to borrow a meter from work to check it. I'm going to cycle it a few more times, to see if capacity recovers after the lockdown sitting period, I think someone suggested that. 26236 miles total -Chris ps. I must confess, my EV grin is wider driving our Chevy Bolt, even if it does plan to catch fire someday.. On Saturday, July 24, 2021, 11:21:27 PM CDT, Michael Ross via EV <[email protected]> wrote: For LiFePO, a parasitic load might be protective. It's that full charge that is destructive. On Sat, Jul 24, 2021 at 11:40 PM EVDL Administrator via EV < [email protected]> wrote: > On 24 Jul 2021 at 21:04, Michael Ross via EV wrote: > > > The worst thing you can do to LiFPO is to charge it fully, and let it sit > > around, especially in a hot location. > > Isn't that the case for lithium batteries of any chemistry? I'm not a > lithium expert by any means; I'm just asking. > > It occurs to me that some of Chris's parasitic loads could be coming from > "inside the house," so to speak. That is, they might be from the BMS. > > I have 24v and 36v 10ah LiFePO4 batteries with a BMS with logic that's > powered by a 12v tap (not the optimum design), and the 4 cells that power > the BMS always take longer than the others to reach full charge. For long > term storage I have read a suggestion to disconnect the BMS if possible - > but don't forget to reconnect it when taking the battery out of storage. > > David Roden, EVDL moderator & general lackey > > To reach me, don't reply to this message; I won't get it. Use my > offlist address here : http://evdl.org/help/index.html#supt > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > First they came for the journalists. We don't know what > happened after that. > > -- Unknown > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > -- Michael E. Ross (919) 585-6737 Land (919) 901-2805 Cell and Text (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Tablet, Google Phone and Text -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210725/a87a408c/attachment.html> _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
