Hello Dave, now I want to see the 5Ah cell tested to full 20C specs
As for the storage, I have read about the problem somewhere,
but now I cannot find any reliable source, but also I could not
find any reliable info about the real difference betweeen the high
rate RC so-called li-po and the low rate normal li-ion cells.
What could be a decent protocol if one would try to make own
aging tests?
I was thinking something like n groups for n test voltages,
each group will be maintained at the test voltage, periodically
part of the cells in group will be tested with a pair of
charge-discharge cycles, and restored to the voltage it had
before the last test. Each group could be 2 or more cells.
A possible scenario could be:
Initial stabilization of 20 cycles to full capacity,
3 groups 2 cells each, 3 voltages: 4.2 4.05 3.9V
every month one cell per group will be tested for residual
capacity and full capacity, and then recharged to the same
voltage it had before the last test.
In one year, half of the cells will experience 24 cyles and
half will be tested only in the beginning and in the end of
the test, so we could try to separate the cycling effects
from the plain aging effects.
Minimum requirements: 6 cells, and one year of time
Fabio.
edit:
Dave, reading the comments on youtube, big
single cell Li-iron cells can be found around,
cylindrical and prismatic, in eu there is ev-power.eu