| 摘要 |
PROBLEM TO BE SOLVED: To detect the highest temperature in a battery in an abnormality, quickly cut off the internal circuit of the battery, improve safety, and miniaturize the battery itself by arranging a current cutoff mechanism in the hollow core section of an electrode, and cutting off the internal circuit of the battery via the action of the current cutoff mechanism. SOLUTION: This nonaqueous electrolyte secondary battery 1 is provided with an electrode 2, a temperature fuse 3 serving as a current cutoff mechanism arranged in the core section 2a of the electrode 2, a negative electrode can 4 loaded with the electrode 2, and a cap 5 closing the opening 4a of the negative electrode can 4. A radial type small alloy temperature fuse is used for the temperature fuse 3, for example, a temperature-sensitive element (fusible alloy) is provided in its main body 3a, and a pair of lead wires connected to the temperature-sensitive element are extracted to the outside of the main body 3a to form positive electrode leads 9a, 9b. The tip section of the positive electrode lead 9b is fixed to the back face of a rapture disk 10. |
