Thermal Battery for Electric Vehicles: High-Temperature Heating System for Solid Media Based Thermal Energy Storages

Thermal energy storage systems open up high potentials for improvements in efficiency and flexibility power plant industrial applications. Transferring such technologies as basis thermal management concepts battery-electric vehicles allow alternative ways heating the interior avoid range limitations during cold seasons. The idea of is to generate heat electrically (power-to-heat) parallel charging battery, store it efficiently discharge at a defined temperature level. successful application requires two central prerequisites: higher systemic densities compared today’s battery-powered PTC heaters well discharging powers. A promising approach both requirements based on solids storage. These an efficient transfer gaseous medium (air) due wide geometric configurations with specific surfaces use ceramic materials suitable operating temperatures. However, small dimensions are needed, allowing homogeneous solid powers An appropriate technology this purpose resistance wires integrated inside channel shaped solids. promise wire 1300 °C transport via radiation. Such heated have been known long time stationary applications, e.g., domestic heaters, but new mobile For evaluation regard density identify preferred extensive investigations necessary. purpose, transient models relevant mechanisms whole system were created. In order time-efficient simulations studies electrical system, novel correlation effective radiation coefficient Fourier Number was derived. This includes effects conduction resistances enables through its dimensionless parameterization investigation process geometrical configurations. Based application-typical specifications derived correlation, variation regarding performed evaluated respect densities, surface loads dimensions. favored design option selected here, maximum 201 Wh/kg 4.6 W/cm2 achieved showing significant benefits battery powered heaters. Additionally, proofing confirming concept, test rig erected focusing experimental process. first setup-up including all components, mean temperature-related deviations between simulative results 4.1% detected temperatures 870 reached. systematically confirm feasibility, efficiency, thermodynamic synergies potential reach current solutions.