It's good to hear confirmation. I have said this for years. Sent from my iPad
> On May 30, 2016, at 3:40 PM, Hoegberg via EV <[email protected]> wrote: > > > > ---------------------------------------- >> Date: Mon, 30 May 2016 01:11:12 -0700 >> To: [email protected] >> Subject: Re: [EVDL] Old packs as powerwalls @L3 EVSE sites to help smoothout >> the grid, +more >> From: [email protected] >> >> I don't think battery's self-discharge is any significant factor, if >> that is what you are talking about. Typical self-discharge of Li packs >> is less than 0.1% per day so for a storage that should be able to bridge >> a couple days as in grid storage, this issue is irrelevant. >> Otherwise, people would not be doing just this... >> >> Cor van de Water > > > > I just tried some Lipo cells that have been on the shelf for..about 16 years,, > without any charging > > They had almost full voltage.. !! Wow, thats interesting > Some day I will do a voltage capacity plot of them, I have 3pcs > > Sony Energytech from Ericsson Phones, > size code VP383562A A1 > > year/Date code:(??) > WHK16B > > > I also had some russian NiMh AAcells from 1992, they > also had ok voltage still, after about 10 years now without a charge.. > > The Powercells from Honda Civic hybrid (NiMh, D-size) > seems to have a *very* high self discharge, some months before they are low > on energy. > but they seems to always recover great with some overcharging. > > > And I also have some chinese HY-power(?) White 100Ah LiFePo4 pack > (20 Ah bags inside) that have not seen charge since 2008, > They was also not dead now 2016, in fact it had a lot of Ah left, > > (and they had been shorted/overcharged > back in 2009, badly. And only 5 of 16 cells was not big balloon-ed back > then,, > > 1 was slightly swollen > > I have seen a slight increase of the balooning over > the years now on the bad cells. But the 4 non-balooned cells have stayed > flat and fine over the years. > > / John > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
