公开(公告)号：EP2075126A1

公开(公告)日：2009-07-01

申请号：EP08022337.3

申请日：2008-12-23

申请人： SK Energy Co., Ltd.

发明人： Rhee, Jang-Weon ,  Jung, Inhwa ,  Kang, Gwigwon ,  Lee, Youngkeun

IPC分类号： B32B27/32 ,  C08J5/22 ,  H01M2/16

CPC分类号： B32B27/32 ,  B32B37/153 ,  B32B38/0032 ,  B32B2038/0028 ,  B32B2305/30 ,  C08J9/28 ,  C08J2201/0543 ,  C08J2201/0546 ,  C08J2323/06 ,  H01M2/1653 ,  H01M2/1686 ,  Y10T428/1379 ,  Y10T428/249978 ,  Y10T428/249979 ,  Y10T428/249981 ,  Y10T428/249986

摘要： The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.

摘要翻译： 本发明涉及用于电池隔膜的多层微孔聚烯烃膜及其制备方法。 本发明的微孔多层膜具有由聚乙烯赋予的低关闭温度和由聚丙烯和耐热填料赋予的高熔融断裂温度两者的特性。 此外，它具有由湿法制备的微孔赋予的高强度和稳定性，以及由干法制备的大孔赋予的高渗透性和高强度。因此，该多层膜可以有效地用于制造具有 高容量和高功率。

公开(公告)号：EP2065953A1

公开(公告)日：2009-06-03

申请号：EP08019522.5

申请日：2008-11-07

申请人： SK Energy Co., Ltd.

发明人： Kang, Gwigwon ,  Rhee, Jang-Weon ,  Jung, Inhwa ,  Lee, Youngkeun ,  Kim, Yong Kyoung

IPC分类号： H01M2/16 ,  C08J5/18 ,  C08L23/06 ,  B01D69/02 ,  B01D71/28

CPC分类号： H01M2/1653 ,  B01D71/28 ,  B01D2325/02 ,  B01D2325/04 ,  B01D2325/20 ,  B01D2325/24 ,  C08J5/18 ,  C08J2323/06 ,  Y10T428/24

摘要： The present invention relates to a microporous polyolefin film suitable as a separator for batteries and thermal properties thereof. A microporous polyolefin film according to the present invention has a film thickness of 5-40 µm, a porosity of 30%-60%, a permeability of 2.0x10 -5 -8.0x10 -5 Darcy, a maximum pore size determined by the bubble point method of not more than 0.1 µm, a puncture strength of 0.20 N/µm or more at room temperature and 0.05 N/µm or more at 120°C, and a maximum shrinkage ratio in the transverse direction (TD) when subjected to a thickness-normalized external force in TMA (thermo-mechanical analysis) of not more than 0%. With excellent thermal stability at high temperature as well as superior puncture strength and gas permeability, the microporous polyolefin film according to the present invention is suitable for high-capacity,and high-power batteries.

摘要翻译： 本发明涉及适合作为电池用隔膜的微孔性聚烯烃膜及其热性质。 根据本发明的微孔聚烯烃膜具有5-40μm的膜厚度，30％-60％的孔隙率，2.0×10 -5 -8.0×10 -5达西的渗透率，由气泡确定的最大孔径 在室温下的穿刺强度为0.20N /μm以上，在120℃下为0.05N /μm以上且在横向方向（TD）的最大收缩率为 TMA（热机械分析）中的厚度归一化外力不大于0％。 本发明的微孔聚烯烃膜在高温下具有良好的热稳定性以及优异的穿刺强度和气体渗透性，适用于大容量和大功率电池。

公开(公告)号：EP2036699A8

公开(公告)日：2009-05-06

申请号：EP08016152.4

申请日：2008-09-12

申请人： SK Energy Co., Ltd.

发明人： Jung, Inhwa ,  Rhee, Jang-Weon ,  Kang, Gwigwon ,  Lee, Youngkeun ,  Kim, Yongkyoung

IPC分类号： B29C55/00 ,  C08J5/18 ,  H01M2/16

CPC分类号： H01M2/1653 ,  B29C55/14 ,  B29C55/16 ,  B29K2023/065 ,  B29K2105/0073 ,  B29K2105/04 ,  C08J5/18 ,  C08J2323/06 ,  Y10T428/249953 ,  Y10T428/249978

摘要： The present invention relates to a microporous polyethylene film for use as battery separator. The microporous polyethylene film according to the present invention is characterized by having a film thickness of 5-40 µm, a porosity of 35-55%, a permeability from 2.5×10 -5 to 10.0×10 -5 Darcy, a puncture strength of at least 0.10 N/µm at 90 °C, a puncture angle of at least 30° at 90 °C, and a permeability from 2.0×10 -5 to 8.0×10 -5 Darcy after shrinking freely at 120 °C for 1 hour. The microporous polyethylene film in accordance with the present invention has very superior puncture strength and thermal stability at high temperature and takes place of less decrease of permeability due to low thermal shrinkage at high temperature, as well as superior permeability. Therefore, it can be usefully applied in a high-capacity, high-power battery to improve thermal stability and long-term stability of the battery.