Efficient and Extensible Quasi-Explicit Modular Nonlinear Multiscale Battery Model: GH-MSMD. Issue 6 (1st January 2017)

• Record Type: Journal Article
• Authors: Kim, Gi-Heon; Smith, Kandler; Lawrence-Simon, Jake; Yang, Chuanbo
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 6(2017)
• Page Start: A1076
• Page End: A1088
• Publication Date: 2017-01-01
• Subjects: 3D -- battery -- lithium-ion battery -- model -- multi-scale -- multiscale -- simulation -- transport; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0571706jes
• Languages: English
• ISSNs: 0013-4651

Abstract

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.