Thanks for sharing. For LFP after charging to 100%, then down to what % within how long time would be a good for the battery health? For example, may be back to 90% or lower within 10 hours?
There is a steep step in LFP at ~70%. 72% technically in the upper picture. Depends on the central graphite peak).
This is just one test on a specifik cell a few years back.
The exact number might vary little between different LFP’s.
This is a more recebt test.
100 and 87.5% has the same calendar aging at 15C, ( but a slight difference at 45C)
75% has slightly less calendar aging at 15C, but you need below that to reduce calendar aging more.
The resolution is not very high in this test (but still better than many other tests).
Theslas use ~ 4.5% buffer and LFP vary the buffer with BMS uncertiness.
The buffer means that the true SOC is higher than the displayed SOC.
With the lowest buffer, true SOC is around 1.5% more than you read on the display at around 70%.
So 70% is good according to the research on the upper picture (does not show the sharp limit at 72% on the picture but the research report had the data).
It could be a good idea to aim to reduce the time above 70% displayed.