Abstract
Complex physics and long computation time hinder the adoption of computer aided engineering models in the design of large-format battery cells and systems. A modular, efficient battery simulation model—the multiscale multidomain (MSMD) model—was previously introduced to aid the scale-up of Li-ion material & electrode designs to complete cell and pack designs, capturing electrochemical interplay with 3-D electronic current pathways and thermal response. This paper enhances the computational efficiency of the MSMD model using a separation of time-scales principle to decompose model field variables. The decomposition provides a quasi-explicit linkage between the multiple length-scale domains and thus reduces time-consuming nested iteration when solving model equations across multiple domains. In addition to particle-, electrode- and cell-length scales treated in the previous work, the present formulation extends to bus bar- and multi-cell module-length scales. Example simulations are provided for several variants of GH electrode-domain models.
Original language | American English |
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Pages (from-to) | A1076-A1088 |
Journal | Journal of the Electrochemical Society |
Volume | 164 |
Issue number | 6 |
DOIs | |
State | Published - 2017 |
Bibliographical note
Publisher Copyright:© The Author(s) 2017. Published by ECS.
NREL Publication Number
- NREL/JA-5400-67202
Keywords
- 3D
- battery
- lithium-ion battery
- model
- multi-scale
- simulation
- transport