| abstract |
Disclosed is an electrochemical device comprising an electrode assembly having a cathode, anode and an electrolyte, and a casing surrounding the electrode assembly, which further comprises a protection device to which either or both of a cathode lead for connecting a cathode with an outer terminal and an anode lead for connecting an anode with an outer terminal are connected electrically, wherein the protection device is disposed in the inner space of 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 the electrode lead is present. |