| abstract |
Provide one: can effectively prevent the evaporation of electrolyte and waternIn addition, in the case of intrusion into the inside of the battery, the battery characteristics are not deteriorated in a high-temperature environment, and a sufficient discharge capacity can be maintained, and the discharge capacity is high, and a nonaqueous electrolyte secondary battery having excellent storage characteristics is provided.nThe system has a bottomed cylindrical positive electrode can (12), andnThe negative electrode can (22) fixed to the opening portion (12a) of the positive electrode can (12) is interposed by a gasket (40), and the opening portion (12a) of the positive electrode can (12) is riveted to the negative electrode can. (22) side, the housing space is sealed, and the shortest distance between the riveting front end portion (12b) and the negative electrode can (22) in the opening portion (12a) of the positive electrode can (12) L1) is 70% or less with respect to the average thickness (t) of the positive electrode can (12), and the shortest distance between the front end portion (22a) of the negative electrode can (22) and the positive electrode can (12). (L2) is 60% or less with respect to the average thickness (t) of the positive electrode can (12), the front end portion (22a) of the negative electrode can (22), and the bottom portion (12c) of the positive electrode can (12). The distance (L3) between the two is 110% or less with respect to the average thickness (t) of the positive electrode can (12). |