LITHIUM-ION BATTERY

摘要

The present invention is a cylindrical lithium-ion secondary battery. This lithium-ion battery has a structure in which the value of B/A is optimized in the case where the distance between the pole to which reed strips are welded, the reed strips being formed intermittently in the winding direction (which is the lengthwise direction of the strip electrode) and the inner wall of the battery can is taken as A, and the distance between the pole and the wound electrode group is taken as B, in order to secure an exhaust passage of gas generated upon the occurrence of an abnormality in the battery.