Due to the low prices and the avaliability of Li-ion batteries, their usage is very common in todays energy storage applications and promising for the emerging electrical vehicle technology. The usage of computational tools in understanding the response dynamics of Li-ion batery cells are expanding in recent years, since the experimental techniques are more expensive than the simulation techniques. Especially, open source libraries developed with python language are commonly used in the literature for understanding the energy storage system dynamics under various operation conditions. In battery usage, the temperature and the dynamics of long term discharging and charging cycles are important parameters for obtaining longer operation times. In this numerical study, we first describe the working principle of Li-ion batteries with relatively simple approach named as equivalent cell circuit model. Then, a python-based battery simulation library PyBaMM is utilized for simulating and discussing the effect of temperature and discharging current overtime on the response dynamics of battery cell. It is observed that in the long term discharging cycles, the response magnitude of the battery cell becomes stronger with the increasing discharging current and decreasing temperature. This causes the Li-ion battery to reach a higher voltage value in long-term-cycles and provides a longer operation time.
Anahtar Kelimeler: Li-ion Battery, PyBaMM, Discharge Current, Temperature, Long-Term-Cycle