Recently, the Machinery Research Institute of Beijing Institute of Machinery Industry, "unidirectional stretch film production line" a successful trial, becoming the only one dry lithium battery separator equipment, technology and technology service providers to solve the key components of lithium batteries - Lithium battery diaphragm production of key technologies to achieve China's development and production of new power key breakthroughs in key technologies, application requirements and huge market space, environmental protection and economic value significantly. The main product of "unidirectional stretch film production line" is lithium battery separator. Lithium battery has the advantages of high energy density, long cycle life, light weight and small volume as well as its advantages of safety, reliability and quick charge and discharge. To the new power technology research hot and difficult. According to reports, the high value-added products in the field, the market demand increased year by year, the General Machinery Institute will continue to tap the field of thin film production technology, promote the development of new energy manufacturing in our country.