Lead acid battery Design features Ageing mechanisms Stress factors Categories of stress fac. Testing procedures
The stress factors of over 150 scientifically monitored RES were analysed in the project. The stress factors were visualized by the means of a radar plot in which six intensity evaluated stress factors are depicted. The two temperature-related stress factors were not used in the categorization. The individual stress factors in the radar plots were ordered in accordance to the related ageing mechanisms. Thus the resulting shapes in the radar plots are relatively compact and allow easier visual comparison of the shapes. A significant number of randomly selected data sets were depicted in the radar plots and printed. The radar plot shapes were visually sorted on the base of the resulting shape area appearance. Six categories were recognised and described by the individual stress factors intensity bands. The radar plots with the intensity bands of all the six categories are shown on the pictures in the following table.
Radar plot diagrams for categories of similar use (G1 to G6), based on six stress factors.