Cable-type secondary battery

摘要

The present disclosure provides a cable-type secondary battery, comprising: an inner electrode; a separation layer surrounding the outer surface of the inner electrode to prevent a short circuit between electrodes; and a sheet-form outer electrode spirally wound to surround the separation layer or the inner electrode.

主权项

1. A cable-type secondary battery, comprising: an inner electrode;
a separation layer surrounding an outer surface of the inner electrode to prevent a short circuit between electrodes; and a sheet-form outer electrode helically wound to surround the separation layer, wherein the sheet-form outer electrode is helically wound so that it does not overlap itself, wherein the inner electrode has a hollow structure whose central part is empty; and wherein the sheet-form outer electrode comprises a sheet-form outer current collector and an outer electrode active material layer formed on a surface of the sheet-form outer current collector.