중대형 배터리의 재사용을 위한 내부저항 평가에 관한 연구

정재범; 임민규; 김남현; 김현재; 노대석

doi:10.5370/KIEE.2023.72.6.717

주제분류

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저널정보

대한전기학회
전기학회논문지 학술저널
전기학회논문지 제72권 제6호
2023.6 717 - 723 (7page)
DOI : 10.5370/KIEE.2023.72.6.717

저자정보

정재범 (Korea University of Technology and Education)
임민규 (Korea University of Technology and Education)
김남현 (Korea Testing Laboratory)
김현재 (Korea Testing Laboratory)
노대석 (Korea University of Technology and Education)

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초록·키워드

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Recently, used batteries are expected to dramatically increase according to the expansion of the EV(electric vehicle) market. Accordingly, Korean government has improved the supporting systems for the recycling of used batteries, and in particular, in the field of repurposing, various studies are being conducted for effective evaluation methods that can secure the performance and safety of batteries after use. Repurposing of used batteries is mostly adapted in the field of ESS(energy storage system) for normally used EV batteries and a total inspection before repurposing is required due to battery characteristics. Therefore, this paper investigates the operating mechanisms of the IR(internal resistance) test method, and implements a test device for middle and large sized cell and pack. Based on the proposed method, the IR of NMC-type commercial batteries is analyzed with various conditions, and it is confirmed that the proposed method is effective in IR measurement and safety evaluation for the repurposing battery.

#ESS #Li-ion Battery #Used Battery #Re-purpose #Recycle #Resistance #DC IR #AC IR