[논문]셀소재를 고려한 리튬2차전지 제조공정 위험성 평가 방법 연구

김태훈

doi:10.14346/jkosos.2022.37.2.76

셀소재를 고려한 리튬2차전지 제조공정 위험성 평가 방법 연구
Research on Risk Assessment of Lithium-ion Battery Manufacturing Process Considering Cell Materials 원문보기

한국안전학회지 = Journal of the Korean Society of Safety, v.37 no.2, 2022년, pp.76 - 87

김태훈 (인천대학교 안전공학과)

Abstract ▼ AI-Helper

Lithium-ion batteries (LIBs) have attracted much interest for their high energy density (>150 mAh/g), high capacity, low self-discharge rate, and high coulombic efficiency. However, with the successful commercialization of LIBs, fire and explosion incidents are likely to increase. The thermal runaway is known as the major factor in battery-related accidents that can lead to a series of critical conditions. Considering this, recent studies have shown an increased interest in countering the safety issues associated with LIBs. Although safety standards for LIB use have recently been formulated, little attention has been paid to the safety around the manufacturing process for battery products. The present study introduces a risk assessment method suitable for assessing the safety of the LIB-manufacturing process. In the assessment method, a compensation parameter (Z-factor) is employed to correctly evaluate the process's safety on the basis of the type of material (e.g., metal anode, liquid electrolyte, solid-state electrolytes) utilized in a cell. The proposed method has been applied to an 18650 cell-manufacturing process, and three sub-processes have been identified as possibly vulnerable parts (risk index: >4). This study offers some crucial insights into the establishment of safety standards for battery-manufacturing processes.

주제어

표/그림 (12)

그림 Fig. 1. Tesla Megapack factory fire (source: The Sydney Morning Herald, 2021)¹⁸⁾.
그림 Fig. 2. Illustration of a lithium-ion battery working principle.
그림 Fig. 3. Chain reactions of thermal runaway process.
그림 Fig. 4. Schematic of a lithium-ion battery manufacturing process.
표 Table 1. Severity ranking for risk assessment
표 Table 2. Probability ranking for risk assessment
표 Table 3. RAC matrix for process safety assessment
표 Table 4. Safety assessment for lithium-ion battery manufacturing process
그림 Fig. 5. A commercial 18650 cell.
표 Table 5. Key specifications and components of a commercial 18650 cell
표 Table 6. Risk assessment of a commercial 18650 cell manufacturing process
표 Table 6. Continued

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