[논문]상변화물질을 활용한 원통형 리튬이온 배터리 셀의 냉각성능 및 등온유지성에 관한 연구

윤재형; 현수웅; 정희준; 신동호

doi:10.5407/jksv.2023.21.2.034

[국내논문] 상변화물질을 활용한 원통형 리튬이온 배터리 셀의 냉각성능 및 등온유지성에 관한 연구
Study on cooling performance and isothermal maintenance of cylindrical type lithium-ion battery cell using phase change material 원문보기

한국가시화정보학회지= Journal of the Korean society of visualization, v.21 no.2, 2023년, pp.34 - 45

윤재형 (Department of Mechanical Engineering, WKU) , 현수웅 (Department of Mechanical Engineering, WKU) , 정희준 (Department of Smart Automotive Engineering, WKU) , 신동호 (Department of Smart Automotive Engineering, Wonkwang University (WKU))

Abstract ▼ AI-Helper

When lithium-ion batteries operate out of the proper temperature range, their performance can be significantly degraded and safety issues such as thermal runaway can occur. Therefore, battery thermal management systems are widely researched to maintain the temperature of Li-ion battery cells within the proper temperature range during the charging and discharging process. This study investigates the cooling performance and isothermal maintenance of cooling materials by measuring the surface temperature of a battery cell with or without cooling materials, such as silicone oil, thermal adhesive, and phase change materials during discharge process of battery by the experimental and numerical analysis. As a result of the experiment, the battery pack filled with phase change material showed a temperature reduction of 47.4 ℃ compared to the case of natural convection. It proves the advanced utility of the cooling unit using phase change material that is suitable for use in battery thermal management systems.

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표/그림 (25)

그림 Fig. 1. (a) Surface temperature distribution of battery cells after 2C discharging with thermal imaging camera and (b) Thermocouple points at battery cell
표 Table 1. Specifications of Samsung INR 18650 - 30Q
그림 Fig. 2. Images of battery pack filled with cooling materials: (a) Thermal adhesive, (b) PCM, (c) Silicone oil
그림 Fig. 3. Schematic of experimental set up for battery test
표 Table 2. Properties of cooling materials
표 Table 3. Experimental devices and resolution
그림 Fig. 4. Domain and boundaries of numerical setup
그림 Fig. 5. Temperature of battery surface by time with cooling materials during 2C discharging process
$Fig. 6. Photos of PCM melting fraction in the battery pack after 2C discharging process: (a) Side view and (b) Top view$ 그림 Fig. 6. Photos of PCM melting fraction in the battery pack after 2C discharging process: (a) Side view and (b) Top view
표 Table 4. Boundary conditions in numerical set up
그림 Fig. 7. Temperature of battery surface by time with cooling materials after 2C discharging process
그림 Fig. 8. Temperature of battery pack distribution by time with cooling materials during 2C discharging process
그림 Fig. 9. Temperature of battery cell distribution by time with cooling materials during 2C discharging process
그림 Fig. 10. Mesh independence test for battery temperature
그림 Fig. 11. View of a grid, adopted for the computations of the present study: (a) Front view; (b) Top view
그림 Fig. 12. Time step independence test for battery temperature
그림 Fig. 13. Experimental and numerical results of battery temperature by time during discharging process
그림 Fig. 14. Numerical monitoring plane of PCM battery pack: (a) Top view and (b) Side view
$Fig. 15. Numerical and experimental results of melting fraction of solid PCM after discharging processe: (a) Side view and (b) Top view$ 그림 Fig. 15. Numerical and experimental results of melting fraction of solid PCM after discharging processe: (a) Side view and (b) Top view
$Fig. 16. Numerical results of volume fraction of solid PCM and tempeature scalar field after discharging processe: (a) Side view and (b) Top view$ 그림 Fig. 16. Numerical results of volume fraction of solid PCM and tempeature scalar field after discharging processe: (a) Side view and (b) Top view
그림 Fig. 17. Numerical monitoring plane of PCM battery pack inside: (a) Top view and (b) Side view
$Fig. 18. Numerical results of volume fraction of solid PCM in discharging processes of Top view$ 그림 Fig. 18. Numerical results of volume fraction of solid PCM in discharging processes of Top view
$Fig. 19. Numerical results of volume fraction of solid PCM in discharging processes of Side view$ 그림 Fig. 19. Numerical results of volume fraction of solid PCM in discharging processes of Side view
그림 Fig. 20. Contours of the magnitude of the velocity and streamlines for PCM battery pack
그림 Fig. 21. Contours of the temperature for PCM battery pack

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