公开(公告)号：US06200706B1

公开(公告)日：2001-03-13

申请号：US08940988

申请日：1997-09-30

申请人： Tetsuya Ashida ,  Takahiro Tsukuda

发明人： Tetsuya Ashida ,  Takahiro Tsukuda

IPC分类号： H01M216

CPC分类号： D04H1/541 ,  D04H1/54 ,  D21H13/14 ,  D21H13/18 ,  D21H13/24 ,  D21H13/26 ,  D21H13/40 ,  D21H13/46 ,  D21H13/48 ,  D21H15/10 ,  D21H25/04 ,  H01M2/1606 ,  H01M2/1613 ,  H01M2/162 ,  H01M2/1626 ,  H01M6/16

摘要： The object of the present invention is to provide a nonwoven fabric for separators of non-aqueous electrolyte batteries which is superior in adhesion to electrodes, causes no breakage of the separator and neither slippage nor space between electrode and the separator at the time of fabrication of battery, provides superior battery processability such as rollability with electrodes, causes no internal short-circuit due to contact between electrodes caused by shrinking or burning of the nonwoven fabric even when electrodes generate heat owing to external short-circuit, whereby ignition of the battery can be inhibited, has no pin holes and is superior in retention of electrolyte and penetration of electrolyte, and which can give non-aqueous electrolyte batteries superior in capacity, battery characteristics and battery storage characteristics. Specifically, the nonwoven fabric for separators of non-aqueous electrolyte batteries according to the present invention has a thickness non-uniformity index (Rpy) of 1000 mV or less or a center surface average roughness SRa of 6 &mgr;m or less in whole wavelength region as measured using a tracer method three-dimensional surface roughness meter.

摘要翻译： 本发明的目的是提供一种非水电解质电池用隔膜用无纺布，其与电极的密合性优异，不会发生隔膜的破损，并且在制造时不会发生电极与隔板之间的滑动和间隔 电池提供优异的电池加工性，例如具有电极的滚动性，即使当电极由于外部短路而产生热量时，也不会由于无纺布的收缩或燃烧而导致由于电极之间的接触而导致的内部短路，由此电池的点火 被阻止，没有针孔，并且在电解质的保留和电解质的渗透方面优异，并且可以赋予非水电解质电池容量，电池特性和电池存储特性优异。 具体而言，本发明的非水电解质电池用隔膜用无纺布的厚度不均匀指数（Rpy）为1000mV以下，中心面平均粗糙度SRa为6μm以下，全波长范围为 用示踪法测量三维表面粗糙度计。