나노 사이즈 입자가 포함된 양극 활물질 함량에 따른 차량용 AGM 연축전지 성능특성
Performance characteristics of AGM lead acid battery with the content of positive plate incorporating nano-size additive material
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초록
AGM 연축전지(Absorbent Glass Mat Lead-Acid Battery)의 수명 특성을 결정짓는 양극 활물질(Active Material)의주요 구성 결정인 4BS(Tetrabasic lead Sulfate)의 입자 크기를 제어하기 위해 4BS Nano Seed(NS)를 적용 중에 있다. 4BSNS 적용 시, 나노 입자 특성상 분산 안정성이 저하되어 제 기능을 다하지 못한다. 이를 개선하기 위해 기존 첨가제인 광명단(Red Lead)에 나노 입자의 4BS seed가 포함된 Incorporated Nano Seed(INS)를 함량별로 첨가하여 양극판 분석과 제품 성능을 평가하였다. INS 함량이 증가할수록 4BS 입자 크기는 작아지면서 균일해지는 특성을 확인할 수 있었으며, 반응 비표면적 증가에 따른 고율 방전 특성도 향상되는 것을 알 수 있었다. 극판 제조 공정에서의 개별 극판에 대한 입도 분포의 편차를 확인하기 위해, AGM 연축전지 200 대 대한 내부 저항 및 전압 검사를 진행하였으며 제품 제조 공정 품질 편차가 감소하는 것을 확인하였다.
Abstract
Nano seed incorporated in micro-sized 4BS (Tetrabasic lead Sulfate) seed was applied to the positive electrodeactive material and compared with Nano 4BS seed (NS). The dispersion of NS decreased due to the aggregationphenomenon, while the nano seed incorporated in micro-sized 4BS seed (INS) could confirm excellent dispersion. As thecontent of INS increased, the particle size of the active material became small and constant, which was confirmed throughSEM and particle size analysis. The specific surface area for the reaction was increased and the high-rate discharge andlifetime characteristics were improved. In order to confirm the variation in particle size distribution in the platemanufacturing process, internal resistance and voltage were measured for 200 AGM lead-acid batteries, and it wasconfirmed that batteries quality variation decreased.
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