The PE separator can be penetrated by the electrolyte in a very short time, has very good mechanical strength, has good chemical stability and low resistance;There are many varieties of PE materials, including partitions with a thickness of 2-3mm. The selection of raw materials is very critical, which will directly affect the normal use of PE separators;When the raw material particles are coarse, it is easy to cause the hole diameter of the separator to be too large, and it is not suitable for battery use.
Because the separator does not have sufficient mechanical strength, it is easy to be mechanically damaged or pierced by deformation, resulting in a short circuit between the positive and negative electrodes and the failure of the batteryDue to the loose assembly, the pressure between the plate and the separator is small, so that the separator with low density floats in the acid and causes the battery to short-circuit failureThe PE separator is not aligned during the assembly process, which makes the battery short circuit and fails, and the corrosion resistance of the separator is poor, and the oxidation resistance is not good, resulting in the separator perforating or breaking in the acid.
Due to the large pore size of the separator, the active material suspended in the electrolyte penetrates and causes a short circuit in the battery. Due to the insufficient porosity, the separator has poor water permeability, resulting in large internal resistance of the battery. The pulp fiber separator is easy to rot, and the separator is very tolerant of poor wettability and high resistanceThe active material on the plate falls off and accumulates at the bottom of the battery, and when it reaches a certain amount, it will cause a short circuit;
PE separator uses molecular weight polyethylene and silica as the main raw materials, with good raw material performance, not easy to wear, strong oxidation resistance and sulfuric acid corrosion resistanceDue to the special process treatment, the PE separator has low resistance and can be encapsulated into a bag, which completely isolates the positive and negative plates, thus completely eliminating the battery short circuit phenomenon caused by the deposition of active materials and overcoming the defects of the traditional separator in the process of use.