ELECTROCHEMICAL DEVICE COMPRISING ELECTRODE LEAD HAVING PROTECTION DEVICE

摘要

Disclosed is an electrochemical device comprising an electrode assembly havi ng a cathode, anode and an electrolyte, and a casing surrounding the electrode assembly, which further comprises a protection device to which either or bot h of a cathode lead for connecting a cathode with an outer terminal and an ano de lead for connecting an anode with an outer terminal are connected electrically, wherein the protection device is disposed in the inner space o f the casing and the electrode lead equipped with the protection device is folded at both sides of the protection device so that the largest surface of the protection device is layered on a lateral surface of the casing where th e electrode lead is present.