Original scientific paper
https://doi.org/10.5599/jese.2013.0040
Mathematical modeling and reliability analysis of a 3D Li-ion battery
Richard Llang
; Raffles Science Institute, Raffles Institution, One Raffles Institution Lane, Singapore 575954
Tangsheng Zou
; Raffles Science Institute, Raffles Institution, One Raffles Institution Lane, Singapore 575954
Karthik Somasundaram
; Department of Mechanical Engineering, National University of Singapore, Singapore 117576
Wei Tong
; Department of Mechanical Engineering, National University of Singapore, Singapore 117576
Erik Birgersson
; Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576
Abstract
The three-dimensional (3D) Li-ion battery presents an effective solution to issues affecting its two-dimensional counterparts, as it is able to attain high energy capacities for the same areal footprint without sacrificing power density. A 3D battery has key structural features extending in and fully utilizing 3D space, allowing it to achieve greater reliability and longevity. This study applies an electrochemical-thermal coupled model to a checkerboard array of alternating positive and negative electrodes in a 3D architecture with either square or circular electrodes. The mathematical model comprises the transient conservation of charge, species, and energy together with electroneutrality, constitutive relations and relevant initial and boundary conditions. A reliability analysis carried out to simulate malfunctioning of either a positive or negative electrode reveals that although there are deviations in electrochemical and thermal behavior for electrodes adjacent to the malfunctioning electrode as compared to that in a fully-functioning array, there is little effect on electrodes further away, demonstrating the redundancy that a 3D electrode array provides. The results demonstrate that implementation of 3D batteries allow it to reliably and safely deliver power even if a component malfunctions, a strong advantage over conventional 2D batteries.
Keywords
3D batteries; Li-ion battery; mathematical model; reliability analysis; thermal model
Hrčak ID:
119470
URI
Publication date:
25.1.2014.
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