Otro interesante estudio de IOP. Esta vez sobre degradación de celdas LFP que viene a corroborar lo que ya se sabía.
Mantener el SOC por encima del 75% degrada sensiblemente más las celdas LFP. Es el factor más importante por encima de la temperatura o de la profundidad de los ciclos de carga y descarga. Insisto: mantener. No subir si es necesario.
Cycling near the top of charge (75%–100% SOC) is detri-
mental to LFP/graphite cells. Our results show a correlation
between the average SOC of battery operation and capacity fade
rate, meaning that the lower the average SOC, the longer the
lifetime, in these 2500 h of testing. The average SOC was found
to be the most critical factor influencing capacity fade for LFP
cells, over the factors of temperature, depth of discharge,
electrolyte salt choice or graphite choice. Cells cycled in the
conventional 0%–100% SOC window showed capacity fade rates
intermediate to 0%–25% and 75%–100%. Therefore, the time
spent cycling at high states of charge is critical to minimize. The
degradation mode of LFP/graphite cells can be summarized as
lithium inventory loss from electrolyte reduction on the negative
electrode, also called shift loss.
https://iopscience.iop.org/article/10.1149/1945-7111/ad6cbd/pdfEnviado desde mi 21051182G mediante Tapatalk