Abstract
The dynamic behavior of the lithium-ion battery is evaluated by simulating the full battery system and each corresponding component, including the jellyroll and thin-foil electrodes. The thin-foil electrodes were evaluated using a novel design of split Hopkinson tensile bar (SHTB), while the jellyroll was evaluated using the split Hopkinson pressure bar (SHPB). A new stacking method was employed to strengthen the stress wave signal of the thin-foil electrodes in the SHTB simulation. The characteristic of the stress–strain curve should remain the same regardless of the amount of stacking. The jellyroll dynamic properties were characterized by using the SHPB method. The jellyroll was modeled with Fu-Chang foam and modified crushable foam and compared with experimental results at the loading speeds of 20 and 30 m/s. The dynamic behavior compared very well when it was modeled with Fu-Chang foam. These studies show that the dynamic characterization of Li-ion battery components can be evaluated using tensile loading of stacked layers of thin foil aluminum and copper with SHTB methodology as well as the compressive loading of jellyroll using SHPB methodology. Finally, the dynamic performance of the full system battery can be simulated by using the dynamic properties of each component, which were evaluated using the SHTB and SHPB methodologies.
Highlights
Understanding the mechanical properties of lithium-ion batteries and how each subcomponent can contribute to the failure of the overall system by causing a short circuit is one of the subjects of interest in the broad field of research on the mechanical integrity of lithium-ion batteries
The damage that may be sustained from a road accident must be considered when designing an electric car, because even a slight deformation of the battery may cause short-circuiting with potentially
Equations (6) and (7) where σ is the principal stress, d is the damage parameter, hysteretic unit (HU) is the hysteretic unloading unit, S is the shape factor for unloading, and W corresponds to the hyperelastic energy per unit undeformed volume, which can be useful to model the effect of unloading after the foam is compressed dynamically [27]
Summary
Hafiz Fadillah 1,2 , Sigit Puji Santosa 1,2, *, Leonardo Gunawan 1,2 , Akbar Afdhal 1 and. Lightweight Structure Laboratory, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi. Received: 11 July 2020; Accepted: 23 September 2020; Published: 26 September 2020
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