21700 : Voltage [V] vs Charge (Capacity) [A•h] Discharge Curve : Samsung 50E, LG M50LT

[itsko]

Does anyone know where I could find Voltage [V] vs Charge (Capacity) [A•h] discharge plots for lithium ion cells,
particularly high capacity (low continuous discharge rating) cells in the 5 [A•h] range,
such as Samsung 50E, LG M50LT?

(Unrelated: These cells are available on 18650 Battery Store — is there anything wrong or notable with the cells on this site?)

 

[TDA78]

Samsung 50E test results
LG M50LT test results

18650 Battery Store / Bulk Battery only sells new grade A cells. I have a very well matched pack made with their 50E2 cells.

 

[docw009]

I recently built two 13S-3P using 50R and ML50T cells. WIth a 3A load, both packs tested out at 4,67AH per cell, running from 54.6V til the BMS shut off around 42V. I thought that was pretty good. WOuld have been happy at 4.5AH.

I usually see at least a 10% drop in the running AH from the advertised AH, but I;m also shutting them down with a bms at 3V.cell, plus the voltage sag in my packs raises that to 3,2V,