| 摘要 |
PURPOSE:To obtain a separator having no leakage of an electrolyte by a method, in which holes are formed on the manifold forming part of a porous film and electrolyte non-transmissive round materials are fitted into said holes while piling up homogeneous frame members on both sides of the film for being heat- pressed. CONSTITUTION:Holes 23 are formed on the manifold forming part of a porous film 21, while round plates 24 made of the electrolyte non-transmissive polyolefin system resin homogeneous to the film 21 are fitted into the holes 23. Next, an electrolyte non-transmissive frame members 22 homogeneous to the film 21 are put on and under the film 21 for being molded en bloc by heat pressing. Subsequently, the manifolds 9, 9' and 10, 10' as well as bolt holes are formed on the monifold forming part. A separator with a frame of a layer-built secondary battery obtained in this way is excellent in flatness of the frame part while not generating leakage of the electrolyte and a short circuit of the liquid. |
