Thermal simulation analysis of a lithium-ion battery group

doi:10.19799/j.cnki.2095-4239.2019.0214

Abstract

Abstract:

The thermal characteristics of the lithium-ion battery packs are of considerable significance for their operation and maintenance. In this study, a cell thermal model is simplified into a uniform heating unit to simplify the computation during the simulation process. The novel model structure is validated through thermal simulation using a lithium-ion battery pack, and its accuracy can be experimentally verified. Further, the thermal characteristic parameters of the lithium-ion cells are acquired via an accelerating rate calorimeter. Subsequently, a lithium-ion battery pack thermal model is constructed and solved using computational fluid dynamics and computer-aided design programs based on the simplified cell thermal model and considering an air cooling scenario. The internal flow field distribution and in-service temperature data of the battery pack are analyzed. Finally, the accuracy of the simulation result is verified through a prototype experiment. When charged and discharged at a constant current of 0.5C, the simulated temperature of this battery pack exhibits the same variation profile as that exhibited by the experimental measurement with an error of 0.9 °C being observed with respect to the maximum temperature and 0.2 °C being observed with respect to the temperature difference in case of the simulation and experimental results.

Key words: CFD simulation, Li-ion battery group, flow field, temperature field

CLC Number:

TM 911

TIAN Gangling, LIU Hao, YANG Kai, ZHANG Huiqing, LUO Jun. Thermal simulation analysis of a lithium-ion battery group[J]. Energy Storage Science and Technology, 2020, 9(1): 266-270.

Figures/Tables 10

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