| 摘要 |
PROBLEM TO BE SOLVED: To provide a security mechanism having no protection circuit wherein no current is made to flow in an abnormal state in which there is a generation of gas, in an electrochemical device such as a lithium secondary battery or the like using a flexible film as a sheath bag. SOLUTION: In the electrochemical device having a flexible sheath bag 2 and an electrochemical element to be enclosed in the sheath bag 2, the electrochemical element has an inner electrode 4 and an outer electrode 3 which is electrically connected to the inner electrode 4 and led outside of the sheath bag 2, and the outer electrode 3 and the inner electrode 4 are connected at an adhesive part 11. In some kind of an abnormal state in which gas is generated and the sheath bag 2 is swollen, the outer electrode 3 and the inner electrode 4 receive a stress so as to be peeled off at the adhesive part 11. When such a state is further advanced, the adhesive part 11 is destroyed and the current is shut off so that the safety is ensured. |
