An overvoltage protection device is adopted, which is provided with a conductive polymer that runs away thermally when the resistance value becomes V/P or higher, given that the power consumption when actuated is P and the voltage of the secondary battery ...

In a current conducting terminal in contact with the positive electrode of a battery (A) and with the negative electrode of a battery (B) in order to conduct current between the two batteries (A), (B), a conductive polymer is placed between the positive el...

A PTC device formed integrally on a PCB substrate, such a PCB substrate, a secondary battery protection circuit device comprising such PCB substrate provided with a circuit to control the voltage and current of secondary batteries, and a secondary battery ...