[논문]Thermal stability characteristics of high-power, large-capacity, reserve thermal batteries with pure Li and Li(Si) anodes

Cho, Jang-Hyeon; Im, Chae Nam; Choi, Chi Hun; Ha, Sang-hyeon; Yoon, Hyun-Ki; Choi, Yusong; Bae, Joongmyeon

doi:10.1016/j.electacta.2020.136612

[해외논문] Thermal stability characteristics of high-power, large-capacity, reserve thermal batteries with pure Li and Li(Si) anodes

Electrochimica acta, v.353, 2020년, pp.136612 -

Cho, Jang-Hyeon (Department of Mechanical Engineering, KAIST) , Im, Chae Nam (Agency for Defense Development) , Choi, Chi Hun (Agency for Defense Development) , Ha, Sang-hyeon (Agency for Defense Development) , Yoon, Hyun-Ki (Agency for Defense Development) , Choi, Yusong (Agency for Defense Development) , Bae, Joongmyeon (Department of Mechanical Engineering, KAIST)

Abstract ▼ AI-Helper

Abstract High-power, large-capacity reserve thermal batteries are useful power sources for the actuators of guided weapons and propulsion for the underwater vehicles. However, unexpected thermal runaway and explosions can occur due to the thermal design error. Preventing such accidents is crucial and arduous challenge in developing high capacity, reliable thermal batteries. To do so, the heat balance between the heat source and the electrode/solid-electrolyte components must be carefully considered when designing a thermal battery. Herein, the optimal discharge temperatures and heat balances of thermal batteries are obtained through the discharge experiment of unit cells with Li(Si) and pure-Li anodes (LAN): (Li(Si): 500 °C/100 cal g⁻1, LAN: 550 °C/110 cal g⁻1). The thermal properties of two types of thermal batteries (150 V, 80 cells, 1 kWh) with Li(Si) and LAN are also analyzed using COMSOL Multiphysics software. Furthermore, to compare the performance, two high-power, large-capacity thermal batteries with the same heat-source energy (110 cal g⁻1) are fabricated and discharged at 40 A over 600 s. The experimentally evaluated temperatures of the cathodes, electrolytes, heat sources, and other components are found to be consistent with the simulation results suggesting that this study provides a complete and accurate computational methods to design high capacity thermal batteries. Highlights Li(Si) and pure Li anodes were evaluated through discharge testing of unit cells. Large-capacity thermal batteries were fabricated and discharged. COMSOL Multiphysics software was used for thermophysical data analyses. Internal discharge temperatures compared well with simulated results. COMSOL-analysis program is recommended to design large-capacity thermal batteries.

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참고문헌 (25)

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[해외논문] Thermal stability characteristics of high-power, large-capacity, reserve thermal batteries with pure Li and Li(Si) anodes

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[해외논문] Thermal stability characteristics of high-power, large-capacity, reserve thermal batteries with pure Li and Li(Si) anodes

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