| 摘要 |
PROBLEM TO BE SOLVED: To provide a protective device for secondary battery capable of preventing abnormal overcharge of a secondary battery.SOLUTION: A protective device for secondary battery includes a battery module including a plurality of unit cells connected in series with each other between a positive electrode terminal and a negative electrode terminal, and charged by coupled with a charger through a first external port coupled with the positive electrode terminal and a second external port coupled with the negative electrode terminal, a pack fuse formed in a current path between the battery module and charger, and a coupling section forming a bypass pathway through which a current flowing between first and second unit cells, out of a plurality of unit cells, can flow through the fuse pack depending on the internal pressure of the battery module. |
