Investigation of Reversible and Irreversible Heat Sources and Entropic Coefficient in a Lithium-Ion Battery by Employing Isothermal Calorimeter

摘要

The main objective of the paper is to quantify the reversible and irreversible heat sources in a 13 Ah pouch type commercial Lithium Titanate Oxid battery by using isothermal calorimeter. Lithium-ion batteries are the most appropriate technology for electrified vehicles applications. Isothermal battery calorimeters are precise devices, which are used to determine the heat generated by the batteries. The heat generation in a functioning lithium-ion battery during the discharge and charge process is usually estimated by the aggregate of two fundamental sources, which are the irreversible and reversible heat. The reversible heat generation rate could be determined from the entropy variation. The irreversible heat is a complicated parameters to be determined and is characterized in dissimilar procedures in various heat analysing models. The results will assists on a precise thermal model of the battery.