锂离子电池隔膜专利分析与发展趋势

Patent Analysis of Separator for Li-ion Batteries and Its Development Tendency

随着科学技术的日新月异，作为绿色电池之一的锂离子电池已成为储能最重要的途径，亦是移动信息和日常生活中不可或缺的产品．锂离子电池隔膜是锂离子电池的重要组成部分，隔膜在正负电极之间起物理隔离作用，可以有效防止电路短路，同时隔膜允许锂离子从中通过，使电池充放电功能得以实现．因此，锂离子电池隔膜对锂电池性能和安全性有着重要的影响．为了了解锂离子电池隔膜技术在世界范围及国内的分布及发展趋势，通过德温特（oH）数据库以及国家知识产权局专利检索与服务系统分别对近十年（2005～2014年）国际范围内及国内专利情况进行了检索和统计，并对其知识产权的发展趋势进行分析和预测．

With the rapid development of science and technology nowadays, Li-ion battery, as one kind of green batteries,has been an important approach for energy storage and indispensible for mobile information and daily life as well. eparator is a necessary component of Li-ion battery. It is a physical barrier between the positive and negative electrodes preventing electrical short circuits,the transport of ions making the charging and discharging cycles available. Therefore, the separator has critical effect on the performance and safety of Li- ion batteries. In order to understand the tendency of technology for separator preparation all over the world and in China,the relevant patents （2005 to 2014） from the Derwent Innovations Index and the Patent Search and Service System of SIPO are reviewed.