Crash Models for Advanced Automotive Batteries: A Review of the Current State of the Art

Evaluation of Modelling and Simulation Strategies to Investigate the Mechanical Integrity of a Battery Cell Using Finite Element Methods

“…The component layers are assigned with individual thicknesses and distinct mechanical material properties such as density, modulus of elasticity, yield, strength etc. The anode or cathode are made up of active materials and current collectors [12]. In one method the current collectors (e.g., copper foil, aluminium foil and active materials) are also modelled separately as shown in Figure 4a.…”

“…In this method a single part is modelled representing the complete jellyroll or stack of the battery cell components. Thicknesses and material properties of individual layers are combined and assigned to this single part [12]. To determine the modulus of elasticity for the homogeneous material (E jellyroll ) the mean value method of Voight can be used.…”

“…To determine the modulus of elasticity for the homogeneous material (E jellyroll ) the mean value method of Voight can be used. This procedure considers the respective volume ratios (v) and the modulus of elasticity (E) of the individual cell components [12] as shown in Equation ( 1).…”

“…The resolved layer area is assigned with individual properties and a homogeneous part with combined properties. Turner et al [12] evaluated this modelling method with a different number of resolved layers. They reported that in their model, when four out of eight sets of stack layers were resolved, the results were consistent.…”

“…The modelling of the battery cell is categorised by the structure of the jellyroll as well as by the behaviour of the materials under different load directions. The structural modelling of the battery cell with a finite element method can be done with mainly two modelling approaches, namely homogeneous or macroscopic and heterogeneous or microscopic modelling [12]. Furthermore, there are some other techniques to build the FE model such as hybrid modelling and sandwich modelling as shown in Figure 3.…”