Patent ID: 7687195
Filing Date: 2010-03-30
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A nonaqueous electrolyte secondary battery in which a grooved portion provided in the upper portion of the outer casing thereof protrudes toward the inner portion of the outer casing, a group of electrodes being housed in the outer casing, a positive electrode and a negative electrode being wound in a spiral manner while facing each other through a separator in the group of electrodes, and a sealing member is placed on the upper portion of the grooved portion through insulated packing to seal the opening of the outer casing in an airtight manner, wherein a circular insulating plate provided with an opening and a cut portion is arranged between the upper region of the said group of electrodes and the lower surface of the said grooved portion, the said cut portion extending from an end portion of the opening, and an inner peripheral side of the cut portion of the circular insulating plate is raised from an outer peripheral side of the cut portion.