Abstract:

This paper documents the experimental characterization of a Li-ion battery cell during the charging/discharging cyclic operations. The study of the battery cell is conducted in the absence of a cooling aid system and provides thermal and electrical insights. After describing the experimental set-up, the temperature changes are presented, highlighting the nonuniform temperature distribution on the battery cell surface. The findings indicate that the maximum temperature difference on the investigated battery cell surface may reach up to 11 C at 3C and 17 ⁰C at 5C at the end of the discharge in the natural convection case. These space changes come with temporal variations that are also documented. Voltage curves are provided during charging and discharging operations. The impact of the discharge rate and ambient temperature are then investigated together with the capacity fade after 500 cycles. Results showed that ventilation and low ambient temperatures allow alleviating the battery capacity fade by 3%.