I found this tidbit while reading on TMC:
Impedance normally directly correlates with capacity.
Anecdotal evidence with LEAF Spy typically shows a small bump in Ah and Health readings after a "100%" charge and I discharge to below to LBW, but this typically goes away within a couple days.
Anyway thought this was interesting and may provide for some discussion. Of course, the battery used in this study is not the same lithium chemistry as is used in the LEAF.
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stopcrazypp said:You have to be careful on that. Calendar and cycling losses are not additive. The NREL battery degradation model (which has been matched to actual cell behavior of the same NCA chemistry) says to take which one is worse, but not to add the losses together. The reason for this is because cycling suppresses electrolyte film growth, which is the main cause of degradation from storage (see page 11 here):
http://www.nrel.gov/vehiclesandfuels/energystorage/pdfs/45048.pdf
Impedance normally directly correlates with capacity.
Anecdotal evidence with LEAF Spy typically shows a small bump in Ah and Health readings after a "100%" charge and I discharge to below to LBW, but this typically goes away within a couple days.
Anyway thought this was interesting and may provide for some discussion. Of course, the battery used in this study is not the same lithium chemistry as is used in the LEAF.
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