| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrode assembly with structurally stable for an external shock, preventing an electrode pushing phenomenon and improving wettability of the electrode assembly to electrolyte solution, capable of ultimately improving safety, performance and life characteristics of a battery, and a secondary battery containing it. <P>SOLUTION: The electrode assembly has a structure winding a plurality of laminated unit cells by a separation film of a long sheet shape, a plurality of through-holes for making it easy for electrolyte solution to go in and out are formed at a part of the separation film surrounding a side face of the electrode assembly in the separation film. <P>COPYRIGHT: (C)2008,JPO&INPIT |
