Recently, a scientific innovation project named Lithium-ion battery separator Project undertook by ChinaHaisum has moved forward.Two inventions which named "Preparation method of modified polyethylene diaphragm for lithium ion battery" and "Device for pre-dried film transfer coating of lithium ion battery membrane and the method",were successfully won the patents issued by State Intellectual Property Office.
So far, China Haisum has received 5 national patents in the diaphragm of lithium ion battery technology research field.