The chemical composition of glass fiber is an important factor that affects the performance of the separator and directly affects the chemical performance of the separator. The influence of the diameter and length of the ultra-fine glass fiber cotton on the diameter of the ultra-fine glass fiber. The smaller the diameter of the ultra-fine glass fiber, the larger the surface area and the better the wetting performance. Therefore, the smaller the pore size of the separator, the resistance to dendrite penetration The stronger, the higher the resistance value. The length of the glass fiber also affects the performance of the separator. The cotton yarn is long, the fiber is not easy to disperse, causing flocculation, making the separator uneven; the cotton yarn is short, which can improve the uniformity of the separator, but the strength is low, so you should choose a suitable length range. The effect of harmful impurities in the glass fiber cotton is that the harmful impurities directly affect the performance of the diaphragm. The presence of metal ions such as cotton, copper, and nickel leads to increased battery self-discharge and gas evolution. Less harmful impurities are selected to ensure excellent partition performance.

Its impact on battery performance directly affects battery capacity, charge-discharge cycle life and self-discharge performance. The main factors that determine the cycle life of the battery are the pore size, pore size distribution and thickness of the battery. When charging and discharging, the lead powder gradually enters the negative electrode side through the separator, and the negative electrode dendrites may penetrate the separator and cause a long-term short circuit of the battery. Cell anatomy showed that at the end of life, the separator on the negative side turned reddish brown, indicating the presence of a small amount of lead powder. It should be pointed out that the quality of the selected separator plays a key role in preventing the battery from short-circuiting for a long time. Its good permeability and oxidation resistance, small and uniform pore size, moderate porosity, can significantly reduce the charge termination current, extend the battery life, and reduce the self-discharge rate. The resistance of the separator directly affects the discharge voltage and capacity. When the battery is discharged, the greater the resistivity, the smaller the working pressure and discharge capacity. Therefore, we must use a small battery separator resistance. Through the above discussion, it is believed that the quality of the battery pack is an important factor that affects the charge and discharge life, self-discharge size, and capacity of lead batteries. Therefore, in the production process, the required battery separator should be reasonably selected according to the characteristics of different batteries.