The protective function of the battery separator in the operation of the battery

Its function is to prevent the positive and negative poles from contacting and short-circuit, so that the electrode plates can react normally. Therefore, the battery polyethylene separator should have the characteristics of high porosity, guarantee of ion transmission electric energy, less impurities, acid resistance, and high mechanical strength. In addition, the rubber battery separator can prevent the antimony ions dissolved in the positive grid alloy from migrating to the negative plate surface, thereby reducing the self-discharge of the battery. The battery box is made of hard rubber or plastic with acid resistance and high mechanical strength. It is a container for holding plates, separators and electrolyte. The volume determines the battery capacity. The role of the diluted sulfuric acid electrolyte is to introduce ions into the battery through electrochemical reactions during the conversion process of electrical energy and chemical energy, and during the charging and discharging process of the battery.

With the continuous updating of battery technology, the molding technology of polyethylene separators is becoming more and more mature, and UHMWPE separators have gradually become the mainstream. American Grace has developed polyethylene separators. Polyethylene separator has become an alternative material for traditional separators because of its low resistance, good toughness, resistance to wear, oxidation resistance, corrosion resistance, small pore size, and good sealing. At present, polyethylene partition walls have been widely used in battery production in Europe, the United States, and Australia. To be sure, the use of polyethylene separators will promote battery production.

Polyethylene separators have been in use for more than ten years since the early 1990s. Today, polyethylene separators have been used by most battery manufacturers. The starter batteries produced by some large domestic manufacturers have adopted polyethylene separators. However, due to the difficulty of UHMWPE production and processing, the production technology has always been in the hands of large European and American manufacturers, and China has always been a blank. Until 1996.