Impact of Numerical Methods in Thermal Modeling of Li‐Ion Batteries on Temperature Distribution and Computation Time. Issue 6 (6th January 2021)

• Record Type: Journal Article
• Authors: Veszelka, Zoltan; Queisser, Oliver; Gontscharow, Martin; Wetzel, Thomas; Dörfler, Willy
• Other Names: Wetzel Thomas guestEditor.; Bessler Wolfgang G. guestEditor.; Kamlah Marc guestEditor.; Nirschl Hermann guestEditor.
• Is Part Of: Energy technology. Volume 9:Issue 6(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-06
• Subjects: heterogeneous multiscale method -- lithium-ion batteries -- numerical methods -- temperature distribution -- thermal modeling; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.202000906
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : Thermal battery modeling is important for further battery development and optimization. The temperature strongly influences the performance and aging behavior. In the cell stack, electrochemical processes take place resulting in a large amount of heat release, which, in turn, affects the temperature distribution. Therefore, the main focus is on the cell stack, the most complex structure inside the cell. In particular, the discontinuous and anisotropic material properties represent a major challenge for simulations due to the layering. This work proposes self‐developed methods, based on the Finite Volume Method and the Finite Element Method, taking on these challenges. First, for both methods the functionality is verified and numerical convergence is validated. These, and also classical methods, are compared based on test problems with a known analytical solution in view of numerical errors as well as computing time. It if found that their accuracy and efficiency depends strongly on the specific problem, which makes their numerical investigation necessary and inevitable. Second, the methods are evaluated on a specific battery problem. Their results are plausible and correspond to the physical phenomena. Abstract : The convergence behavior of numerical methods for thermal simulation of Li‐ion batteries and the impact of numerical aspects on them is studied. Therefore, six different methods are investigated regarding error and computation time. Moreover, they are evaluated on a specified battery problem. The results confirm the importance of numerical method development and rigorous convergence analysis.