Mathematical Modeling for Enhanced Properties

Abstract

The solid-state battery is one in which both electrodes and electrolytes are solid substances. In general, the solid-state battery has low power density and high energy density. Because of the higher power-to-weight ratio of solid-state batteries, they are highly desirable batteries for electric vehicles and other high-power devices. Solid-state batteries have attracted extensive attention and increased research on their enhanced properties because of their great advantages in safety, thermal stability, and high energy density. The solid-state batteries work on a similar mechanism as liquid batteries, but their electrolyte is solid, and its density and structure can allow more charged ions to congregate around one end, conducting more curren, and increasing battery capacity. As a result, a solid-state battery becomes smaller for the same power level. Solid-state batteries are more easily sealed because they do not have liquid electrolytes. This results in lower costs and reduces the weight of the entire battery pack, making it suitable for larger devices such as automobiles. This can eliminate the need for additional cooling tubes, electronic controls, and other devices. The modeling of solid-state batteries is mainly separated into three categories: the electrochemical model, the intelligent mathematical model, and the equivalent circuit model. These will be elaborated in this chapter.