| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery being highly safe even when aiming at high capacity. <P>SOLUTION: In the lithium-ion secondary battery which houses an electrode body of a winding structure for winding a positive electrode where at least a part of a positive electrode collector forms a positive electrode active material containing coated film on both sides and a negative electrode where at least a part of a negative electrode collector forms a negative electrode active material containing coated film on both sides via a separator in a battery can, the positive electrode active material containing coated film is not formed on an external surface side of the positive electrode collector at least on the most external periphery, a section of the positive electrode where the positive electrode active material containing coated film is not formed faces to an internal wall surface of the battery can via the separator, a section forming no negative electrode active material containing coated film is arranged on the negative electrode collector at the most external periphery of the negative electrode, a lead body of the negative electrode is mounted on the negative electrode collector at a section where the negative electrode active material containing coated film is not formed, and the lead body of the negative electrode and the positive electrode are not directly faced with each other via the separator. <P>COPYRIGHT: (C)2009,JPO&INPIT |
