The Application Research Of 4BS In Lead-acid Batteries

With the clean energy and communications technology industry's rapid progress and development, there has been a great progress of energy storage, as follows, people will have higher and higher requirement for all kinds of rooms, base station construction, mainly manifested in the battery consistency, high power performance,cycle performance, free maintenance and high security requirements.Lead-acid battery, as one of the major energy storage products in the rooms and base station, in order to adapt to the new application environment, also need improvement on the technique and technology, the composition and structure of the active substance was one of the main factors influencing the battery performance,thus to this aspect of the study is very necessary.Tetrabasic lead sulfate?4BS, 4PbO.PbSO₄?, as an intermediate product of the positive plate in lead-acid batteries' s manufacturing process, and its production and the transformation process has a great impact on the final battery performance; different green plate production process will have a direct impact on 4BS; this research have used XRD?X-ray diffraction? and SEM?scanning electron microscope? to study the microstructure and material components of the positive plate, through making experimental battery under industrial production conditions, it verified that different factors on 4BS related application process have an effect on capacity, power, cycle performance and consistency of battery; it also indicated that in paste process if the ratio of Pb O and H2SO₄ is too high or too low, it will reduce the content of 4BS within the active material, so the range between 5:1 to 7:1 will be the optimal ratio; experiments have shown that the ratio of Pb O and H2SO₄ has no effect on the particle size of 4BS within the active material on crystal, and curing temperature also has no obvious effect on generation of 4BS within the active material, but the impact on the crystal grain size is larger, 4BS's crystal particles has a tendency to decrease gradually following with rise of the curing temperature.Curing time also has a certain impact on the 4BS's production and crystal particle size during curing process.Usually at industrial production conditions extremely it is difficult to control intraplate 4BS content and crystal size of consistency, this study mainly use 4BS additives to improve the product's consistency. It found that the content, composition and distribution of 4BS within the green plate, the ambient temperature during formation, formation current density, specific gravity of acid could affect the structure and composition of Pb O2 after formation,which affected the final performance;After formation of the green plate that add 4BS, its active substances skeleton structure is obvious, it can significantly improved battery cycle performance, as ?-Pb O2 / ?-Pb O2 have different crystal structure and surface area,the final ratio between the two within active substance have more apparent effect on initial capacity of the battery.The results showed that reasonable 4BS generation technology and process can effectively improve the surface area of the active material, so as to enhance highpower performance and capacity performance, also robust skeletal structure can improve battery cycle performance; So adding right amount of 4BS in the paste process can effectively improve the consistency and cycle performance of the battery.