Characterization and Comparison Among Different Lithium Based Batteries: LiFeMgPO4, LiFePO4,Lithium Polymers

The electrochemical storage systems are increasingly employing in stationary, automotive and naval applications. The lithium-ion battery is the technology that has now the best features and future development's prospects. Battery details that allow a right choice in relation to final application are not always available in literature. Among the most used Lithium technologies in stationary and automotive sectors, the CNR-ITAE of Messina (Italy) has selected three different Lithium technologies: Lithium-Iron-Magnesium-Phosphate (LiFeMgPO4), Lithium-Iron-Phosphate(LiFePO4) e Lithium-Polymers to be tested and compared. Different characterization tests were carried out in order to investigate the features of the single technology. In particular the work reports the results coming from tests where different C-rate values were applied, cycling tests with fast charging and discharging using the maximum admitted power, tests with deep charging using different C-rate values, relax tests and working tests without BMS (Battery Management System). The batteries were subjected to different load profile mainly used in stationary and automotive applications. These tests have allowed to analyze the batteries performance in different load conditions and to point out electrochemical performance reductions or packing damage caused by tests reported above. A final analyze was carried out, comparing the main performance indicators (Capacity, Amperometric and Energetic Efficiency, working temperature, etc.)