聚烯烃多层锂电池隔膜专利技术分析

A review of the patents of lithium-ion battery polyolefin multilayer separator

从专利角度梳理了聚烯烃多层锂电池隔膜的技术输出国和申请人分布,并总结归纳了聚烯烃多层锂电池隔膜的技术手段和技术功效分布。结果表明,日本、中国、韩国和美国是目前全球聚烯烃多层锂电池隔膜的主要技术来源国,日本的东丽、旭化成、住友,韩国的LG公司以及中国的深圳星源材质和中国科学院是主要申请人。采用特定的层组分、改性层的设计以及拉伸和造孔工艺的调控,以改进锂电池隔膜的透气性、孔隙率、孔隙均匀性,耐热性、热收缩性,热关闭性能,机械强度和离子渗透性是主要的研究方向。

The nationality distribution,applicant distribution and the technical means and technical efficacy distribution of lithium-ion battery polyolefin multilayer separator were investigated from the view of patents.The result shows that Japan,China,South Korea and the United States are main technology exporter,Toray,Asahi,Sumitomo from Japan,LG from South Korea,Senior technology material Co.,LTD and Chinese academy of science from China are the main applicants.Using a specific components in a layer,the design of modified layer,as well as the regulation of pore-forming process are the main technical approaches,aiming at the improvement of permeability,porosity,pore uniformity,heat resistance,heat shrinkage,heat closed performance,mechanical strength and ion permeability.