Meaning
Computational method that divides a single battery cell into distinct spatial regions to simulate localized thermodynamic and chemical behavior. Employing multi-zone cell modeling improves the accuracy of heat generation forecasts in high-power packs. This approach allows engineers to identify regional differences within the same cell.
Spatial Segmentation
Large format cells are divided into discrete volumes along their height, width, and thickness. Utilizing multi-zone cell modeling enables the simulation of localized temperature gradients that occur during rapid discharge. These regional divisions capture the thermal insulation effects of the cell layers.
Parameter Assignment
Each zone within the simulation is assigned its own set of temperature-dependent parameters, such as diffusion coefficients and charge-transfer resistances. This detail is what makes multi-zone cell modeling superior to single-node lumped models. It allows the simulation to reflect how local state of charge varies as a function of temperature, preventing the underestimation of localized aging effects that typically occur near the battery terminals.
Output Resolution
The simulation outputs a map of state of charge, temperature, and degradation across the entire volume of the cell. High-fidelity maps generated by multi-zone cell modeling guide the design of thermal management plates. This spatial accuracy ensures that cooling is applied where the heat generation is greatest.
