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Numerical study of battery thermal management based on transverse fin-casing composite structure

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Publicado en:Ionics vol. 31, no. 6 (Jun 2025), p. 5737
Autor principal: Cui, Mengting
Otros Autores: Zhu, Zhiwei, Yang, Donghan, He, Zhiqiang, Liu, Yi, Li, Ling
Publicado:
Springer Nature B.V.
Materias:
Temperature distribution
Heat transfer
Discharge
Thermal conductivity
Cooling
Air flow
Conductive heat transfer
Performance evaluation
Temperature gradients
Fins
Temperature
Electric vehicles
Conduction heating
Aluminum
Phase change materials
Composite structures
Batteries
Thermal management
Heat conductivity
Energy consumption
Lithium
Management systems
Thickness
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Resumen:In phase change material-based battery thermal management systems (PCM-BTMS), heat buildup around the battery is more pronounced at high discharge rates due to the lower thermal conductivity of the PCM. To address this challenge, a transverse fin-casing composite structure (TFCCS) is added in PCM-BTMS, and its thermal performance is evaluated in comparison with BTMS without fins (PCM-BTMS) and BTMS with conventional transverse fins (TF-PCM-BTMS). Numerical simulations reveal that TFCCS enhances both longitudinal and transverse heat conduction by constructing a “T-shaped” heat conduction network, which makes the temperature distribution and PCM melting in the system more uniform. Compared with the PCM-BTMS and TF-PCM-BTMS, TFCCS-PCM-BTMS reduces the maximum battery temperature (Tmax) by 24.4% and 9.5%, and the battery temperature difference (ΔT) by 53.1% and 71.0%, respectively, at 5C discharge rate. The effect of the TFCCS structural parameters on the thermal performance of BTMS is further discussed. It is found that the thickness of TFCCS (transverse fin thickness δt and casing thickness δc) mainly affects ΔT, and increasing the number of transverse fins (N) does not always lead to better performance. Moreover, compared to conventional longitudinal fins, TFCCS enhances synergy and reduces entropy production.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-025-06261-w
Fuente:Materials Science Database