BMS의 위험우선순위 분석과 기능안전을 고려한 설계 = Analysis of Risk Priority Number and Functionally Safe Design of Battery Management System

다국어 초록 (Multilingual Abstract)

In recent years, as ESS has become very popular, BMS related electric fires have occurring frequently. In this research we performed analysis of risk priority number (RPN) using Failure Mode and Effects Analysis (FMEA) technique to analyze the safety of BMS, which accounts for the most part in ESS electric fires. And the functional safety concept was used to eliminate or reduce failure modes that may cause overvoltage, overcurrent, and overheating for higher risk priorities of the analyzed BMS. The BMS hardware was redesigned so that the safety mechanism works for the high-priority risk modes, and the main firmware procedures were designed to control the battery against potential malfunctions. And we implemented the improved BMS hardware and experimentally verified that the safety mechanism works as designed. The test results have confirmed that the safety mechanism works normally and the battery can be controlled even if overvoltage, overcurrent and overheating occurs in the BMS, or major firmware procedures malfunction. Therefore we are confident that electric fires related to ESS can be prevented in advance by analyzing the safety of BMS in the way we used in this research to find high-priority risk factors and applying the concept of safety functions to the hardware and software design of BMS.

참고문헌 (Reference)

1 장홍제, "에너지저장장치(ESS)의 안전성 확보를 위한 화재요인 분석 및 표준․안전기준 개발방향 연구" 표준인증안전학회 9 (9): 25-49, 2019

2 김두현, "계통연계형 에너지저장시스템의 위험우선순위 분석" 한국안전학회 31 (31): 10-17, 2016

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6 Michael R. Beauregard, "The Basics of FMEA" Productivity Press 2008

7 Reiner Korthauer, "Lithium-Ion Batteries : Basics and Applications" Springer 2019

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9 E.S. Kim, "Fire Risk Assessment based on Risk Priority Number for Components of ESS" Chungbuk National University 2020

10 김두현, "FTA를 적용한 태양광 발전 및 ESS 연계형 PCS의 안전성 평가" 한국안전학회 34 (34): 14-20, 2019

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14 B.W. Lee, "A study on the Analysis and Solution of ESS System Fire Cause" Hanyang University 2020