Lithium-ion batteries

Tema ovoga rada su litij-ionske baterije. U radu je objašnjen način rada litij-ionskih baterija, njihove tehničke karakteristike, kakav utjecaj imaju na okoliš te je odrađen praktični dio punjenja i pražnjenja dvije vrste litij-ionskih baterija: Panasonic NCR18650B i Samsung INR18650-15M. Grafičkom analizom opisane su pojave prilikom punjenja i pražnjenja navedenih baterija pomoću uređaja Junsi iCharger 4010 Duo. Prikazane su ovisnosti struje i napona o vremenu, kapaciteta o vremenu te snage o vremenu punjenja i pražnjenja. Analizom je utvrđeno da se punjenje litij-ionskih baterija odvija u dvije faze: faza konstantne struje te faza konstantnog napona. Za razliku od punjenja, pražnjenje se odvija u jednoj fazi, odnosno struja pražnjenja je konstantna dok napon ne dosegne donju vrijednost pražnjenja.The topic of this paper is lithium-ion batteries. The paper explains the operation of lithium-ion batteries, their technical characteristics, their impact on the environment and the practical part was done as charging and discharging of two types of lithium-ion batteries of: Panasonic NCR18650B and Samsung INR18650-15M. Graphical analysis described the occurrences when charging and discharging these batteries using the Junsi iCharger 4010 Duo. The dependences of current and voltage and time, capacity and time and power and time of charging and discharging are shown. The analysis showed that the charging of lithium-ion batteries takes place in two phases: the phase of constant current and the phase of constant voltage. Unlike charging, the discharge takes place in one phase, i.e. the discharge current is constant until the voltage reaches the lower value of the discharge