对锂离子电池隔膜技术在中、美、欧的专利申请进行了检索、去噪,在此基础上梳理锂离子电池隔膜技术发展生命周期、主要专利权人、技术研发方向,并通过技术功效分析,找到锂离子电池隔膜技术分布和技术效果。从专利分析的结果来看,锂离子电池隔膜技术经历3个阶段,即技术起步期、技术缓慢发展期以及技术快速增长期;锂离子电池隔膜领域的专利主要集中在H01M2/14、H01M2/16、C08J9/00及B32B27/32四大类,主要涉及隔膜的结构、材质及制备工艺;从整体来看,锂离子电池隔膜未来发展方向主要集中在提高隔膜耐热性、研制超薄隔膜、提高隔膜的吸液性能以及研发聚合物电解质隔膜、纤维隔膜等新型隔膜上;并对标东丽、旭化成、帝人、Celgard、住友化学等全球锂离子电池隔膜技术领先公司,建议我国相关研究单位充分发挥在湿法基膜、改性涂布膜研发上的技术优势,优化湿法制膜工艺、拉伸工艺、涂覆改性工艺,提高隔膜安全性、充放电高效性、使用寿命,抢占制高点,针对技术疏松区或技术空白区进行突破。

The patent applications of lithium-ion battery separator technology in China,the United States,and Europe were searched and de-noised.Based on this,the development life cycle of lithium-ion battery separator technology,the main patent owners,the direction of technology research and development were sorted out,and the distribution of lithium-ion battery separator technology and technology effects were found through technology efficacy analysis.From the results of patent analysis,lithium-ion battery separator technology went through three stages,namely the technology start-up period,the technology slow development period and the technology rapid growth period.The patents in the field of lithium-ion battery separator were mainly concentrated in four major categories,namely H01M2/14,H01M2/16,C08J9/00 and B32B27/32,covering the structure,material and preparation process of the separator.From the overall perspective,the future development direction of lithium-ion battery separator should focus on improving the heat resistance of the separator,developing ultra-thin separator,improving the liquid absorption performance of the separator,developing new separators such as polymer electrolyte separator and fiber separator,and benchmarking Toray,Asahi Kasei,Teijin,Celgard,Sumitomo Chemical and other global leading companies in lithium-ion battery separator technology.it is recommended that relevant research institutions in China give full play to their technological advantages in wet base film,modified coating film research and development.It was also recommended that the relevant Chinese research institutions should give full play to their technical advantages in wet base film and modified coating film research and development,optimize the wet film manufacturing process,stretching process and coating modification process,improve the safety,charging and discharging efficiency and service life of the separator,seize the high ground,and make breakthroughs for the technical laxity or technical gap.