LiFePO4 is harder to use for igniton purposes. I mean burning things down. Drawbacks are higher cell count to reach same pack voltages. LiS has 2,1v but let's see how much better it actually is. No doubt LFP will be improved too. LiMn-chemistries have still better wh/kg than LFP. But mainly just due the higher cell voltage. And it eats electrolytes faster. So in 5year/quartal economy LiMn is a choice. For optimal lifetime costs and from user perspective LFP takes the cake. But if continuing tests on LiS give more good news... it'll wipe the floor with LFP. But we eally cannot yet say it. When we have +5years on-road tests with it then we know. I suspect Boeing wanted to optimize the costs. no battery should be in use more than 12 months. On every major service they would replace just the cells. BMS remains with rhe enclosure. At least I would do so. I would thou use LFP and arrange proper 2nd life/recycling for them. Or actually I would not use even newer than 12 mo LFPs in the pack. Only then their formation is complete enough and cell behaviour is more stable. It's dumb to stare just marketing datasheets and cause millions of dollars damage to them selves. It's obvious they are in too deep waters (or flying too near to sun?) with their level of know-how. -akkuJukka
p.s.- sorry for the typos. my cell is sticky. kids. :) torstai, 14. helmikuuta 2013 Bruce EVangel Parmenter <[email protected]> kirjoitti: > After reading what Bill posted > http://electric-vehicle-discussion-list.413529.n4.nabble.com/Boeing-787-battery-fire-caused-by-shorted-cell-tp4661251p4661254.html > > I wonder why any other type of Li-ion battery is sold? > It sounds like LiFePO4 is the only way to go, right? > > ... > Now I am curious. I personally have a need to replace a couple of 12V > group 24 deep cycle PbSO4 house batteries. These are not only used for > emergency 12VDC power for an .5 hour @1kW-load, but also start a small > 1kW genset. > > I have tried in the past two 6V traction batteries in series, but had to > put a 12V deep-cycle in series-parallel to be able to start the genset. > > *My question is why not use one 12VDC LiFePO4 battery. My small house > rack can handle one or two group 27, or 24 batteries. > > I was looking at > http://www.ebay.com/itm/12V-40Ah-LiFePO4-Lithium-Prismatic-Battery-Pack-with-AC-Charger-LP500-/250996143478?pt=Laptop_Batteries&hash=item3a70893576 > > This one comes with a compatible charger. I have seen these in the past, > but would like to know > -are there better ones to consider, > > -has anyone tried these. > > If I did find one, > - should I disconnect the 12VDC recharging leads from the genset as the > voltages will be wrong for LiFePO4, right? > > I request evdl members to post their ideas, corrections, or any other > thoughts on my questions. > > > {brucedp.150m.com} > > -- > http://www.fastmail.fm - Accessible with your email software > or over the web > > _______________________________________________ > 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) > > -- http://www.google.com/profiles/jarviju#about -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130214/7e12a2cd/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)
