In today's society, the role played by the battery separator has been increasingly valued, and it is called the "third electrode".  According to the latest research, it is increasingly recognized that separators play a crucial role in battery performance. People are particularly concerned about the impact of separator compression on battery performance. Most studies have shown that compressing separators can not only inhibit or delay the early capacity loss phenomenon.  occurs, and can prolong the deep cycle life of the battery.  It is specially used to add silica to ultra-high molecular weight polyethylene battery separators. PE separators have low resistance, high porosity, improved starting performance, oxidation resistance, small pore size and greatly prolong battery life, high strength, and can avoid polar plates.  The material falls off to cause a short circuit, and the battery can also be miniaturized.