/diy/ - Do It Yourself

>>2499237
>>2499237
I have read about the finishing voltage thing with li-ion, actually this pdf is linked to at the top of this post:
http://www.elteconline.com/download/pdf/SAFT-RIC-LI-ION-Safety-Recommendations.pdf

Hmm can't copy-paste so I've make a screenshot, pic related. I figure leaving a li-ion connected 24/7 at 4V is ok (actually battery university frequently mention 3.92V as a li-ion charge voltage, something like the military use that voltage for maximum power recovered from the batteries taking into account their state of charge and the number of cycles they'll last iirc). Similarly I suppose li-fepo permanently connected at 3.3V or something should be o k

Because it seemed to me all that you'd do by leaving li-ion connected at 4.2V for days would be similar to charging it to 4.3V for hours, just you let more current trickle charge in than a normal 4.2V charge with the days of trickle charging. So I imagine an advanced charging algorithm for li-ion would skip the CV stage of charging altogether, eg what if you CC to 4.2V then stop the charger. Is that equivalent to a CC-CV charge to 4.05V or something depending on the battery internal resistance?

I suppose li-ion at 3.92V would give you many of the advantages of and maybe a similar capacity to li-fepo.