Simplified model of charge and discharge of Lithium-ion battery. Study of the influence of the electrode materials.

HENQUÍN, E.R.; AGUIRRE, P.A.

San Luis Potosi, Mexico

Congreso; International Minerals Engineering Congress IMEC 2014; 2014

International Minerals Engineering Congress

The potential for use of lithium ion batteries has been extensively tested, not only in small devices, but in electric or hybrid vehicles and in stationary applications such as energy reservoir of houses, public buildings and even neighbourhoods. The optimized design of such units depends, among other factors, on patterns of use of power needed to operate the device under study, and the technology used in the lithium battery (gel or liquid electrolyte, for example). To accomplish an appropriate design, it is necessary to have mathematical models representing the batteries from the microscopic level (design of materials) to macroscopic studies incorporating mass and energy transfers. Traditional modelling of these units involves coupling different domains of space and time to represent the phenomena occurring during charge and discharge, demanding considerable resources for resolution. The representation of the state of charge of the particles of the electrodes is essential for the purpose of an appropriate mathematical modelling. In this work an analytical simplified mathematical model capable of predicting charge and discharge of lithium batteries is presented. A sensitivity analysis of design parameters and electrode materials for lithium batteries with liquid and gel electrolytes was performed.