[논문]동일 형태의 NCM/LFP 배터리의 열폭주 현상에 대한 수치해석적 비교 연구

강명보; 김우영; 김남진

doi:10.17664/ksghe.2022.18.4.001

동일 형태의 NCM/LFP 배터리의 열폭주 현상에 대한 수치해석적 비교 연구
Numerical Comparative Study on the Thermal Runaway of NCM/LFP Batteries of the Same Geometry 원문보기

한국지열·수열에너지학회논문집 = Journal of the Korean Society for Geothermal and Hydrothermal Energy, v.18 no.4, 2022년, pp.1 - 11

강명보 (제주대학교 기계공학과) , 김우영 (한국폴리텍대학 전북캠퍼스 스마트전기자동차과) , 김남진 (제주대학교 기계공학과)

Abstract ▼ AI-Helper

In this study, the thermal runaway of NCM and LFP batteries were compared and analyzed through numerical analysis under various conditions. Comparing the thermal runaway of the NCM622 (18650) battery cell and the LFP (18650) battery cell through oven test simulation, the LFP battery did not show thermal runaway, whereas the NCM622 battery temperature increased to 710℃ in 12 minutes. To observe the thermal runaway and propagation of the prismatic LFP battery cell, the internal temperature was set at 200℃ and the oven test simulation was conducted. It was found that thermal runaway occurred at 391℃ after 47 minutes. As a result of observing thermal runaway propagation by placing five NCM622 and LFP battery cells, the thermal runaway propagation was clearly observed in the case of the NCM622 battery, but in the case of the LFP battery, thermal runaway was not observed after the first cell. From the third battery cell, it was confirmed that the temperature change was very insignificant, and through this, it is considered that the LFP battery is relatively safe compared to the NCM battery in terms of the thermal runaway propagation of the battery.

주제어

표/그림 (14)

그림 Fig. 1. Global cumulative energy storage installations
표 Table 1. Parameters for numerical analysis
그림 Fig. 2. Thermal runaway of cylindrical LFP battery cell for oven test of 180°C
그림 Fig. 3. Thermal runaway numerical analysis of cylindrical LFP battery of 180°C
그림 Fig. 4. LCO battery thermal runaway comparison to verify the accuracy of simulation
그림 Fig. 5. Thermal runaway of cylindrical LFP battery cell and NCM622 battery cell at oven temperatures of 180℃
그림 Fig. 6. Dimension of prismatic battery cell
표 Table 2. Time required to maximum temperature of LFP battery
그림 Fig. 7. Thermal runaway analysis of NCM622 battery module
그림 Fig. 9. Thermal runaway propagation over time of NCM battery module
그림 Fig. 8. Thermal runaway analysis of prismatic LFP battery module
표 Table 3. Thermal runaway propagation of NCM622 battery module
표 Table 4. Thermal runaway propagation of Prismatic LFP battery module
그림 Fig. 10. Thermal runaway propagation over time of LFP battery module

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