@Pajda I have a special request.
Can your set your charger to turn on and off at X interval?
You could test mild pulse charging like I've seen in 2 scientific articles recently discussing of adding low complexity charging algorithms to existing devices:
The capacity fade of lithium-ion batteries (LIBs) are intimately dependent upon charging–discharging strategies. In this work, a pseudo-two-dimensional model coupled with thermal effects was developed to investigate the effects of pulse current charging–discharging strategies on the capacity...
link.springer.com
To make it short, mild pulse charging uses low frequency charging/relaxation steps.
Opposite to high frequency pulse charging switching at 1Hz-10kHz, we go sub 1Hz with intervals of up to 25s charging-25s relaxation.
This increases battery efficiency a bit, increasing cycle life and being very easy to implement. It doesn't have the larger gains fully optimized frequency (fzmin) charging has, but it doesn't have the downsides of a complex implementation or the possibility of not being better at all than mild CC-CV charging.
In summary, I would like for you to (if you can of course):
- Do a normal 4.2V cycle life test with 0.5C CCCV charging.
- Do a tweaked 4.2V cycle life test with 25s 1C charging/25s relaxation mild pulse charging.
You could also try 20s 1C charging/20s relaxation mild pulse charging to exactly mirror other litterature (0.05Hz).
Both would use a run of the mill >=5Ah cell to test an average cell.
This would be a hard test for such a cell, but doable and would allow us to see if there are benefits with the types of cells that we like to use.
Thank you again for everything you do.
)
