The performance characteristics of a lead acid battery are investigated with the content of Sodium Perborate Tetrahydrate (SPT, NaBO3·4H2O) in a positive plate active material. SPT, which reacts with water to form hydrogen peroxide, is applied as an additive in the positive plate active material to increase adhesion between the substrate (positive plate) and the active material; this phenomenon is caused by a chemical reaction on the surface of substrate. A positive plate with the increasing content of SPT is prepared to compare its properties. It is confirmed that the oxide layer increases at the interface between the substrate and the active material with increasing content of SPT; this is proven to be an oxide layer through EDS analysis. Battery performance is confirmed: when SPT content is 2.0 wt%, the charging acceptance and high rate discharge properties are improved. In addition, the lifetime performance according to the Standard of Battery Association of Japan (SBA) S0101 test is improved with increasing content of SPT.

ISG (Idle Stop & Go) 시스템이 적용되는 자동차에 적합한 납축전지를 개발하기 위해 전극 재료인 3BS (3PbO·PbSO4·H2O)와 4BS (4PbO·PbSO4)의 생성조건과 활물질의 화성 방법에 따른 납축전 지 초기 성능과 심방전에 미치는 영향에 대해 연구 하였다. 양극과 음극 활물질을 숙성반응 중 온도 제 어로 최종 생성 활물질의 상이 변하며, 납축전지의 수명에 영향을 미친다는 것을 알 수 있었다. 초기 성 능에는 3BS 활물질을 적용한 AGM 납축전지와 Flooded 납축전지가 우수한 성능을 나타내는 반면 4BS 활물질을 적용한 AGM 납축전지는 상대적으로 낮은 성능을 나타내었다. 또한, 활물질 화성 효율을 비교 분석하기 위해 화성을 3 step과 9 step으로 구분하여 시험한 결과, 3BS로 제작된 AGM 납축전지에 비 해 4BS 활물질을 적용한 AGM 납축전지의 초기 성능이 우수 하였다. DOD17.5% 수명시험으로 수명 성능을 비교한 결과, 잦은 심방전이 요구되는 ISG 시스템에서 Flooded 납축전지는 적합하지 않았으나, AGM 납축전지는 적합한 결과를 나타내었다. 결론적으로 AGM 납축전지가 ISG 시스템 적용 자동차에 적합하였고, AGM 납축전지의 숙성, 화성 방법에 따라 수명 성능이 80% 차이를 나타내는 것으로 확인 되었다.

This study investigates the paste mixing of positive active materials which, affect the life cycle of batteries in Pb-Ca-Sn grids, and generation of 4BS in a curing process and considers the effects of these things on the initial charge characteristics and life cycle. In the results of the experiments applied in this study, it was possible to reduce the curing time in which the fine 4BS was formed by the mixing of the positive active materials of lead acid battery applied at high temperature compared to that of the existing coarse 4BS and that represented some improvements in the life cycle performance.

In this study, positive plates of lead acid battery of Pb-Ca alloy and Pb-Ca-Sn alloy were fabricated and the mechanical characteristics of positive plates were measured. This study observed how the changes of content of Ca & Sn affect interface corrosion which is located in between grid & active materials and lead acid batteries as well. The mechanical characteristics of grid alloy is better when Ca is 0.05 wt.% then 0.1 wt.%. This study said that the corrosion rate between the active material based on the charge/discharge cycle of lead acid battery and grid interface is much faster than a grid which contains Sn. And furthermore, according to the study the rate 30 of Sn/Ca which is added to grid shows the best performance.

This study was conducted to made a grid alloy (Pb-Ca-Sn-Al) which has a temporary composition ratio in order to improve the efficiency of lead acid batteries. The positive activity material made a 3BS(tri-basic lead sulfate; 3PbO·PbSO4·H2O) by a low temperature curing and it evaluates the plate efficiency through the life cycle testing. The initial current capacity of low temperature curing plate was excellent but the life cycle was not good (S1). As for the S2 plate, however, the initial current capacity and the life cycle were superior.

Generally, it has been known that positive plate efficiency is the most influential effect on the initial current capacity of lead acid battery. Thus, in this study, we have investigated the curing effect of the positive plate, which is one of the important lead acid battery processes. The curing process of the positive plate is performed either with the separation of each plate with 1mm gap or with no gap of plate. As a result, when there is no interval between each plate, the higher temperature current happened than expected, resulting in the changes in the initial current efficiency of the lead acid battery. The chemical composition and crystal structure of a material coated on the positive plate were identified with XRD and SEM. It was resulted that were only there not a lot of 4BS (tetrabasic-lead sulfate, 4PbO·PbSO4) on the plate in case of curing of plates without interval, but a large quantity of Pb3O4 also formed on the surface. On the other hand, it was observed that 3BS (tribasic-lead sulface, 3PbO·PbSO4·H2O) was the main product on the plate in case of typical curing process with some interval. From the initial current capacity test, the positive plate having 3BS was approximately 40% higher in initial current capacity than that having 4BS. It was concluded that 4BS and Pb3O4 on the plate surface were harmful to the initial current capacity of lead acid battery.