Packaging for cable-type secondary battery and cable-type secondary battery comprising the same

A cable-type secondary battery, comprising:

• an electrode assembly having a horizontal cross section of a predetermined shape and extending longitudinally, which comprises an inner current collector, an inner electrode active material layer, an outer electrode active material layer, an electrolyte layer interposed between the inner electrode active material layer and the outer electrode active material layer, and an outer current collector foil formed on the outer surface of the outer electrode active material layer;
• and
• a packaging configured to surround the electrode assembly,
• wherein the packaging comprises a hollow metal foil layer;
• a first polymer resin layer formed on one surface of the metal foil layer;
• and a second polymer resin layer formed on the other surface of the metal foil layer.

A cable-type secondary battery, comprising:

• an electrode assembly having a horizontal cross section of a predetermined shape and extending longitudinally, which comprises an inner current collector, an inner electrode active material layer, an outer electrode active material layer, and an electrolyte layer interposed between the inner electrode active material layer and the outer electrode active material layer;
• and
• a packaging configured to surround the electrode assembly,
• wherein the packaging comprises a hollow metal foil layer acting as an outer current collector;
• a first polymer resin layer formed on one surface of the metal foil layer;
• and a second polymer resin layer formed at both ends of the other surface of the metal foil layer.