Patent ID: 7998614

Claim:
A lithium ion rechargeable cell that is constructed by the steps of forming a cell unit by packing an electrode group, in which a plate-like positive electrode plate and a plate-like negative electrode plate and a plate-like separator are superposed in layers, in a cell case and sealing the electrode group together with an electrolyte; and forming a module by aligning and packing a plurality of cell units in a module case, wherein the cell case is made of a laminated film, and a porous spacer made of an insulating material is interposed in between the entire circumferential surface or partial surface of the electrode group and the laminated film, wherein the porous spacer is made of hard resin that is not elastically deformable, and has a large number of microscopic pores formed through the porous spacer and capable of storing the electrolyte, and wherein the porous spacer and the laminated film are tightly attached together.