Dynamic suppression of temperature buildup in coin batteries via PCM utilization
Applied Thermal Engineering, cilt.301, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 301
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.applthermaleng.2026.131589
- Dergi Adı: Applied Thermal Engineering
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, DIALNET, Business Source Ultimate (EBSCO)
- Anahtar Kelimeler: Battery thermal management, Phase change material, Radial conduction, Axial dissipation
- Boğaziçi Üniversitesi Adresli: Evet
Özet
Predicting and avoiding the thermal runaway in the rechargeable batteries during the peak of operation is essential, which arises from the accumulation of the generated heat within the flammable organic electrolyte. Particularly during dynamic mode, the accumulation of the generated heat necessitates engineering a heat dissipating mechanism to avoid a catastrophic temperature spike. In this regard, a phase change material (PCM), could be a suitable candidate, which, as a heat-buffer component, could absorb the heat (and melt), and release it later during temperature drop (and solidify). Regarding the coin batteries with rounded geometry, the central zone is farthest from the heat dissipation radial boundaries, and in the absence of axial dissipation through the electrodes, the generated heat gets the least possibility to escape to the environment, where it could demand planting/designing a PCM component. In this work, initially an analytical derivation has been developed for the quasi-steady state temperature profile, versus the cell geometry, physical properties of the involved components and charging condition, assuming radial dissipation, for both the absence of PCM (conventional) and its presence (design). Subsequently an implicit numerical algorithm is developed to obtain the temperature profile when accompanying axial heat dissipation. Consequently, the melting interface of PCM has been tracked in real time and its correlation with the axial conductivity and the extent of PCM melting has been addressed. For verification, an experimental setup has been established to trace the steady-state temperature profile, which showed visual agreement with the analytical derivation. Additionally, series of finite element simulations have been performed to record the maximum temperature, both in terms of location and magnitude, where the agreement has been observed with the model derivations. Further characterization quantifies the role of cell scale and thermo-physical properties of PCM on the temperature drop. The proposed design and characterization could be used for engineering of phase change materials during the transient operation of the rechargeable batteries, both in terms of scale and material selection, particularly for utilization during high power perturbations.