A multi scale multi domain model for large format lithium-ion batteries

A multi scale domain (MSMD) model for large format lithium-ion battery (LIB) cells is presented. In our approach the homogenization performed on two scales (i) from particulate electrodes to homogenized electrode materials using an extended Newman and (ii) individual cell layer a material with anisotropic electrical thermal transport properties. Both intertwined homogenizations are necessary considering electrochemical-thermal details related microstructural features of electrolyte layers at affordable computational costs. Simulation results validate MSMD compared isothermal cases. The strength demonstrated non-isothermal conditions, namely 120 Ah discharged four different cooling concepts: without base plate (iii) tab (iv) side cooling. As one result, temperature gradients cause local peak discharge up 2.8 C global 2 rate.