| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance safety and reliability by suppressing the occurrence of short-circuiting caused when the end face edge part of a winding end part of a positive electrode sheet damages a separator, in a nonaqueous electrolyte battery having an electrode winding body formed by winding a short and thick positive electrode like a sheet together with a negative electrode and a separator as a battery element. <P>SOLUTION: Two positive electrode sheets 20, 21 composing the positive electrode 3 are wound so that their winding end parts E are brought under an uneven and dislocated condition. Since the outwardly stretched width of the winding end part E of the positive electrode 21 on the outer periphery side can be suppressed small by providing a level difference between the positive electrode sheets 20, 21, a damage of a separator 5 which is caused when the edge part 21a of the winding end part E of the positive electrode sheet 21 on the outer periphery side greatly stretches outward, and which has been unavoidable when both positive electrode sheets 20, 21 are made even without dislocating them, is eliminated to prevent short-circuiting from being caused. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
