Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Modeling of the lifetime prediction of a 12-V automotive lead-acid battery

차량용 납축전지의 수명 예측 모델링

  • 김성태 (아주대학교 화학공학과) ;
  • 이정빈 (아주대학교 에너지시스템 학과) ;
  • 김의성 (아주대학교 에너지시스템 학과) ;
  • 신치범 (아주대학교 에너지시스템 학과)
  • Received : 2013.06.07
  • Accepted : 2013.11.08
  • Published : 2013.12.31
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Abstract

The conventional lead acid battery is optimized for cranking performance of engine. Recently electric devices and fuel economy technologies of battery have influenced more deep cycle of dynamic behavior of battery. I also causes to reduce battery life-time. This study proposed that aging battery model is focused for increasing of battery durability. The stress factors of battery aging consist of discharge rate, charging time, full charging time and temperature. This paper considers the electrochemical kinetics, the ionic species conservation, and electrode porosity. For prediction of battery life cycle we consider battery model containing strong impacts, corrosion of positive grid and shedding. Finally, we validated that modeling results were compared with the accelerated thermal measurement data.

일반 납축전지는 차량의 시동 성능 위주로 최적 설계되어 있다. 최근 차량 전장 시스템과 납축전지를 활용한 연비기술 적용의 증가로 납축전지의 사용 빈도가 늘어나고 있다. 연비기술 적용은 납축전지의 잦은 충방전 반응을 일으켜 납축전지 내구 수명을 단축시키고 있다. 본 연구에서는 납축전지의 노화 수명 모델 구현을 통해 배터리 내구 수명을 예측하는 방법을 제시하고자 한다. 납축전지의 노화에 영향을 미치는 요인은 방전율, 충전 시간, 완충 시간, 온도 조건 등이 있다. 본 논문에서는 납축전지의 동적 거동을 예측하기 위하여 전기화학반응 속도론, 이온의 전달현상, 전극 공극률의 시간에 따른 변화를 고려하였다. 수명 예측을 위해서 노화 메커니즘 중 노화에 가장 큰 영향을 주는 극판 부식 현상과 활물질 탈락을 노화 모델링에 반영하였다. 개발된 납축전지의 노화 모델을 검증하기 위하여 납축전지의 가속 충방전 시험을 수행하였다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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